CN118561137A - Beam structure hoisting method - Google Patents

Abstract

The application discloses a beam structure hoisting method, which comprises the following steps: a foundation point structure is arranged on the building structure above the pre-hoisting layer; setting the hoisting equipment on the base point structure; moving the beam structure over the hole; hoisting the beam structure to a pre-hoisting layer through hoisting equipment; wherein, the pre-hoisting layer is the floor that needs to be hoisted for the beam structure. The beam structure hoisting scheme can successfully realize hoisting of the beam structure above the holes, and improves the safety in the hoisting process.

Description

Beam structure hoisting method

Technical Field

The application relates to the technical field of building structure hoisting, in particular to a beam structure hoisting method.

Background

In the related art, the traditional hoisting method of the indoor beam structure is that a beam is hoisted integrally or hoisted in blocks, and is usually supported by steel columns at the lower part, and then the beam is hoisted in sections through a hoisting machine and then assembled. However, when holes are arranged below the steel columns, the steel columns cannot be erected above the span as usual, and the beam structures are arranged on the steel columns; and especially when the hole span is large, the beam weight exceeds the weight that the hoisting machine can hoist on the ground on the hole side, the method cannot be used for installation. Therefore, how to hoist the beam structure above the hole is a problem that needs to be solved at present.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides the beam structure hoisting method, which can successfully realize hoisting of the beam structure above the hole and improve the safety in the hoisting process.

According to an embodiment of the first aspect of the present invention, a beam structure hoisting method includes the steps of:

a foundation point structure is arranged on the building structure above the pre-hoisting layer;

setting the hoisting equipment on the base point structure;

moving the beam structure over the hole;

hoisting the beam structure to a pre-hoisting layer through hoisting equipment; wherein,

The pre-hoisting layer is a floor of the beam structure which needs to be hoisted.

The beam structure hoisting method provided by the embodiment of the application has at least the following beneficial effects: the beam structure hoisting method mainly comprises the following steps: a foundation point structure is arranged on a building structure above a floor where the beam structure needs to be hoisted so as to be arranged by hoisting equipment, so that the foundation point structure is used as a foundation point of the hoisting equipment; in addition, the beam structure can be moved to the hole at the same time, so that the two ends of the beam structure are erected on the ground at the two sides of the hole, and then the beam structure is hoisted to the corresponding pre-hoisting layer through hoisting equipment, so that the beam structure is hoisted above the hole; therefore, the beam structure hoisting scheme can successfully realize hoisting of the beam structure above the hole, and improves the safety in the hoisting process.

According to some embodiments of the invention, the step of hoisting the beam structure to the pre-hoisting layer by means of a hoisting device comprises the steps of:

suspending the beam structure to the corresponding height of the pre-suspending layer through a lifting device;

Adjusting the horizontal position of the beam structure through first traction equipment;

And installing the beam structure with the adjusted vertical position and horizontal position on the pre-hoisting layer.

According to some embodiments of the invention, the base point structure is a pre-buried structure disposed on an upper building structure of the pre-hoisted layer.

According to some embodiments of the invention, the foundation structure comprises a rope arranged on the building structure above the pre-hoisting level, the rope being used for hanging and guiding the hoisting device.

According to some embodiments of the invention, the steps of: the horizontal position of the beam structure is adjusted by the first traction device, and the method further comprises the following steps:

Pulling the hoisting device along the rope by a first pulling device to adjust the beam structure to a desired horizontal position;

rope clamps are respectively arranged on two sides of the position of the hoisting equipment hung on the rope so as to fix the position of the hoisting equipment.

According to some embodiments of the invention, the steps of: moving the beam structure over the hole, further comprising the steps of:

Arranging beam units on the ground at one side of the hole in sequence;

sequentially welding the beam units to form a beam structure;

The beam structure is moved so that the beam structure is suspended above the hole on the ground on both sides and below the pre-lifting layer.

According to some embodiments of the invention, the step of arranging beam units on the ground at one side of the hole in sequence comprises the steps of:

Respectively placing the beam units on the transport means;

Diagonal bracing structures are arranged on two sides of the beam unit in the width direction, so that the transportation means, the beam unit and the diagonal bracing structures form a moving unit;

and arranging the mobile units orderly by a traction device.

According to some embodiments of the invention, the transportation means is a ground flat wagon, and the traction device comprises a second traction device, a fixed pulley assembly and a second traction rope, wherein the second traction rope is sequentially connected with an output end of the second traction device, the fixed pulley assembly and the moving unit, so that the second traction device can move the moving unit to a required position through the second traction rope and the fixed pulley assembly.

According to some embodiments of the invention, the steps of: a movable beam structure comprising the steps of:

Removing the transportation tool and the diagonal bracing structure in the middle of the beam structure;

Moving one end of the beam structure so that the one end of the beam structure is positioned on the ground at one side of the hole and corresponds to the lower part of one end of the pre-hoisting layer;

and the other end of the beam structure is moved so that the other end of the beam structure is positioned on the ground at the other side of the hole and corresponds to the lower part of the other end of the pre-hoisting layer.

According to some embodiments of the invention, the beam structure is an i-beam, the diagonal brace structure comprises a first diagonal brace group and a second diagonal brace group, the first diagonal brace group comprises a plurality of first diagonal braces, the first diagonal braces are obliquely arranged, the lower ends of the first diagonal braces are fixedly arranged on the ground flat car and are positioned on one side of a lower flange of the i-beam, the upper ends of the first diagonal braces are abutted to one side of a web plate of the i-beam, the second diagonal brace group comprises a plurality of second diagonal braces, the second diagonal braces are obliquely arranged, the lower ends of the second diagonal braces are fixedly arranged on the ground flat car and are positioned on the other side of the lower flange of the i-beam, and the upper ends of the first diagonal braces are abutted to the other side of the web plate of the i-beam.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The invention is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of a beam unit on a vehicle in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of a beam unit according to an embodiment of the present invention;

FIG. 3 is a schematic view showing the arrangement of beam units on the ground at one side of the hole in order according to the embodiment of the present invention;

FIG. 4 is a schematic view of one end of a walking beam structure in accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of the other end of the walking beam structure in accordance with an embodiment of the present invention;

FIG. 6 is a schematic diagram of a mobile unit according to an embodiment of the present invention;

FIG. 7 is a schematic view of a structure for hoisting a beam structure to a pre-hoisting layer according to an embodiment of the present invention;

FIG. 8 is a schematic view of a beam structure hoisted to a pre-hoisted layer according to an embodiment of the invention;

FIG. 9 is a schematic diagram of a pre-buried structure in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a first traction device for adjusting a horizontal position of a beam structure when a base point structure is an embedded structure in the embodiment of the present invention;

FIG. 11 is a schematic view of the structure of the first traction device for adjusting the horizontal position of the beam structure when the base point structure is a rope in the embodiment of the present invention;

FIG. 12 is a schematic view of a lifting device in accordance with an embodiment of the present invention;

fig. 13 is a schematic view showing the structure of a hanger and an extension cord according to an embodiment of the present invention.

Reference numerals:

Pre-hoisting layer 110; an superstructure 120; a lifting apparatus 200; a beam structure 300; a beam unit 310; a first beam lifting lug 320; second Liang Diaoer 330,330; a hole 400; a first traction device 510; a first traction rope 520; pre-buried structure 600; a pre-buried plate 610; pre-buried reinforcing bars 620; an ear plate 630; a through hole 640; a support plate 650; a rope 710; rope clip 720; an embedment 730; a conveyance 800; a second traction device 910; a fixed pulley assembly 920; a second traction rope 930; a first diagonal strut 1001; a second diagonal brace 1002; a hanging piece 1101; lengthening the cord 1102.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the description of the present application, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The beam structure lifting method according to the embodiment of the present invention is described below with reference to fig. 1 to 13.

As shown in fig. 1 to 13, the beam structure hoisting method according to the embodiment of the invention includes the following steps:

providing a base point structure on the building structure 120 above the pre-hoisting layer 110;

Disposing the lifting apparatus 200 on the base point structure;

moving the beam structure 300 over the hole 400;

Hoisting the beam structure 300 to the pre-hoisting layer 110 by the hoisting device 200; wherein,

The pre-hoist floor 110 is the floor where the beam structure 300 needs to be hoisted.

It can be appreciated that the beam structure hoisting method mainly comprises the following steps: a base point structure is arranged on the building structure 120 above the floor where the beam structure 300 needs to be hoisted for the hoisting equipment 200 to be arranged, so that the base point structure is used as a base point of the hoisting equipment 200; in addition, the beam structure 300 can be moved to the hole 400 at the same time, so that two ends of the beam structure 300 are erected on the ground at two sides of the hole 400, and then the beam structure 300 is hoisted to the corresponding pre-hoisting layer 110 through the hoisting equipment 200, thereby hoisting the beam structure 300 above the hole 400; therefore, the beam structure 300 hoisting scheme of the application can successfully realize hoisting of the beam structure 300 above the hole 400, and improves the safety in the hoisting process.

Specifically, the lifting apparatus 200 may be an electric hoist, a hoist, or the like.

The steps are as follows: hoisting the beam structure 300 to the pre-hoisting layer 110 by the hoisting device 200 comprises the steps of:

Suspending the beam structure 300 to a corresponding height of the pre-hoist layer 110 by the hoisting apparatus 200;

adjusting the horizontal position of the beam structure 300 by the first traction device 510;

the beam structure 300, which is adjusted in vertical and horizontal positions, is installed at the pre-hoist layer 110.

It will be appreciated that, for example, as shown in fig. 7 to 11, in the present embodiment, the step of hoisting the beam structure 300 to the pre-hoisting layer 110 by the hoisting apparatus 200 mainly includes the steps of: the girder construction 300 is first suspended to the height of the pre-hoist layer 110 by the hoisting apparatus 200, and then the horizontal position and posture of the girder construction 300 are adjusted by the first traction apparatus 510 so that the corresponding positions of the girder construction 300 and the pre-hoist layer 110 are aligned, so that the girder construction 300 is then accurately installed to the corresponding position of the pre-hoist layer 110.

Specifically, the first traction apparatus 510 may be a hoist, an electric hoist, or the like, as long as traction of the beam structure 300 can be achieved to achieve adjustment of the horizontal direction and posture.

It will be appreciated that the base structure is a pre-buried structure 600 disposed on the building structure 120 above the pre-hoist floor 110. For example, as shown in fig. 7 to 9, in the present embodiment, when a corresponding building structure is provided right above the pre-hoisting position of the pre-hoisting layer 110 so as to set the pre-buried structure 600, the pre-buried structure 600 is pre-buried before the building structure 120 is cast above the pre-hoisting layer 110, so that the pre-buried structure 600 is used as a base point of the hoisting apparatus 200 so as to facilitate the hoisting apparatus 200 to be suspended. For example, in this embodiment, the pre-buried structure 600 may be disposed on the left upper building structure 120 by having the upper building structure 120 directly above the left side of the pre-hoisting layer 110.

Specifically, as shown in fig. 9, the pre-embedding structure 600 includes a pre-embedding plate 610, pre-embedding bars 620, an ear plate 630 and a supporting plate 650, where the pre-embedding bars 620 and the ear plate 630 are respectively located at two sides of the pre-embedding plate 610, and the ear plate 630 is formed with a through hole 640 for hanging the lifting device 200, the ear plate is provided with the supporting plate 650 respectively up and down to improve strength of the ear plate, the supporting plate above is obliquely connected between the upper end of the pre-embedding plate and the ear plate, the supporting plate below is obliquely connected between the ear plate and the lower end of the pre-embedding plate, and when the upper building structure 120 is poured, the pre-embedding process of the pre-embedding structure 600 in the upper building structure 120 is realized by pouring the pre-embedding bars 620 together in the upper building structure 120.

It will be appreciated that the base structure includes a rope 710 disposed on the building structure 120 above the pre-hoist floor 110, the rope 710 being used to suspend and guide the lifting apparatus 200. For example, as shown in fig. 7 to 11, in the present embodiment, when there is no corresponding building structure right above the pre-hoisting position of the pre-hoisting layer 110, ropes 710 may be provided on the upper building structure 120 on both sides of the pre-hoisting position of the hoisting layer, the ropes 710 may be used as a base point for the suspension of the hoisting apparatus 200, and the adjustment of the horizontal position of the beam structure 300 may be achieved by moving the hoisting apparatus 200 at different positions on the ropes 710. For example, in this embodiment there is no upper building structure 120 directly above the right side of the pre-hoist floor 110, so that ropes 710 are provided on the upper building structure 120 on both sides (i.e., in the front-rear direction) of the right side of the pre-hoist floor 110 in order to set up the hoisting apparatus 200.

Specifically, both ends of the rope 710 may be disposed at the crossing positions of the columns of the upper building structure 120, or the rope 710 may be fixed by disposing the embedments 730 on the upper building structure 120 and fixing the ends of the rope 710 to the embedments 730.

The steps are as follows: the adjustment of the horizontal position of the beam structure 300 by the first traction device 510 further comprises the steps of:

Traction of the lifting apparatus 200 along the ropes 710 by the first traction apparatus 510 to adjust the beam structure 300 to a desired horizontal position;

rope clamps 720 are provided on both sides of the position on which the lifting apparatus 200 is hung on the rope 710, respectively, to fix the position of the lifting apparatus 200.

It will be appreciated that, for example, as shown in fig. 7 to 8, in this embodiment, when the base point structure is a rope 710, after the beam structure 300 is suspended to a desired height, the beam structure 300 is first adjusted to a desired horizontal position and posture by the first traction device 510, and during the adjustment, the lifting device 200 slides along the rope 710, and after the adjustment, rope clips 720 are provided on the ropes 710 on both sides of the lifting device 200 to fix the position of the lifting device 200, that is, to fix the position of the beam structure 300, so that no positional deviation occurs during the installation of the beam structure 300 to the pre-hoisting layer 110.

Specifically, as shown in fig. 11, when the base structure is the rope 710, the superstructure 120 is provided with two first traction devices 510 in addition to both ends of the rope 710, and the two first traction devices 510 may be connected to both sides of the lifting device 200 through the first traction ropes 520, respectively, thereby realizing adjustment of the horizontal position of the lifting device 200 so that the lifting device 200 moves along the rope 710.

As in fig. 1-6, the steps are: moving the beam structure 300 over the hole 400 further comprises the steps of:

the beam units 310 on the ground at one side of the hole 400 are sequentially arranged;

sequentially welding the beam units 310 to form the beam structure 300;

The beam structure 300 is moved so that the beam structure 300 is suspended on the ground on both sides above the hole 400 and below the pre-hoist layer 110.

It will be appreciated that the step of moving the beam structure 300 over the hole 400 mainly comprises the steps of: the beam units 310 are sequentially arranged on the ground at one side of the hole 400, and then the orderly arranged beam units 310 are sequentially welded, thereby forming the beam structure 300, moving the beam structure 300, and making both ends of the beam structure 300 to be erected on the ground at both sides of the hole 400 and positioned under the pre-lifting layer 110, thereby facilitating the subsequent suspension of the lifting apparatus 200.

Referring to fig. 1,2 and 6, the steps of arranging the beam units 310 on the ground at one side of the hole 400 in sequence include the steps of:

Placing the beam units 310 on the transportation means 800, respectively;

Diagonal bracing structures are provided on both sides of the beam unit 310 in the width direction so that the transportation means 800, the beam unit 310 and the diagonal bracing structures constitute a moving unit;

and arranging the mobile units orderly by a traction device.

It will be appreciated that, for example, as shown in fig. 1, 2 and 6, in this embodiment, the steps of arranging the beam units 310 on the ground on one side of the hole 400 sequentially further include the steps of: the beam units 310 are first placed on the transportation means 800, and diagonal bracing structures are provided at both sides of the beam units 310 in the width direction, so as to prevent the beam units 310 from tilting during movement, so that the transportation means 800, the beam units 310 and the diagonal bracing structures form one moving unit, and then the moving units are orderly arranged by a traction device.

It is understood that the transportation means 800 is a ground flat car, the traction device includes a second traction device 910, a fixed pulley assembly 920 and a second traction rope 930, and the second traction rope 930 is sequentially connected to the output end of the second traction device 910, the fixed pulley assembly 920 and the moving unit, so that the second traction device 910 can move the moving unit to a desired position through the second traction rope 930 and the fixed pulley assembly 920. For example, as shown in fig. 3 to 6, in the present embodiment, the transportation means 800 is a ground wagon, and the traction device includes a second traction apparatus 910, a fixed pulley assembly 920 and a second traction rope 930, and the second traction rope 930 is sequentially connected to the second traction apparatus 910, the fixed pulley assembly 920 and the moving unit, so that the second traction apparatus 910 can move by traction of the moving unit by the second traction rope 930 and sequentially arrange them.

The steps are as follows: the moving beam structure 300 includes the steps of:

removing the conveyance 800 and the diagonal bracing structure in the middle of the beam structure 300;

one end of the beam structure 300 is moved so that the one end of the beam structure 300 is positioned on the ground at one side of the hole 400 and below the one end of the pre-hoisting layer 110;

The other end of the beam structure 300 is moved so that the other end of the beam structure 300 is positioned on the ground at the other side of the hole 400 and corresponds to the lower side of the other end of the pre-hoist layer 110.

It will be appreciated that, for example, as shown in fig. 4 to 5, in the present embodiment, the step movement beam structure 300 mainly includes the steps of: firstly, the transportation means 800 and the diagonal bracing structure in the middle of the beam structure 300 are removed, then one end of the beam structure 300 is lifted by a jack, and the direction of the horizontal wheel at the bottom of one end of the beam structure 300 is adjusted, so that one end of the beam structure 300 can move in a desired direction, then the other end of the beam structure 300 is lifted by the jack, and the direction of the wheel of the horizontal wheel at the bottom of the other end of the beam structure 300 is adjusted, so that the other end of the beam structure 300 can move in a desired direction, and finally the two ends of the beam structure 300 are suspended on the ground at two sides of the hole 400.

It is to be appreciated that the beam structure 300 is an i-beam, the diagonal brace structure includes a first diagonal brace 1001 set and a second diagonal brace 1002 set, the first diagonal brace 1001 set includes a plurality of first diagonal braces 1001, the first diagonal brace 1001 is obliquely disposed, the lower end of the first diagonal brace 1001 is fixedly disposed on the ground flat car and is located at one side of a lower flange of the i-beam, the upper end of the first diagonal brace 1001 is abutted to one side of a web of the i-beam, the second diagonal brace 1002 set includes a plurality of second diagonal braces 1002, the second diagonal brace 1002 is obliquely disposed, the lower end of the second diagonal brace 1002 is fixedly disposed on the ground flat car and is located at the other side of the lower flange of the i-beam, and the upper end of the first diagonal brace 1001 is abutted to the other side of the web of the i-beam. For example, as shown in fig. 6, in the present embodiment, the beam structure 300 is an i-beam, the beam unit 310 is an i-beam unit 310, the diagonal brace structure includes a first diagonal brace 1001 group and a second diagonal brace 1002 group respectively located at two sides of the beam unit 310 in the width direction, the first diagonal brace 1001 group includes a plurality of first diagonal braces 1001, and the lower end of the first diagonal brace 1001 is fixed on the ground flat car and one side of the lower flange of the i-beam, and the upper end of the first diagonal brace 1001 abuts against one side of the web of the i-beam; the second diagonal bracing 1002 set includes a plurality of second diagonal bracing 1002, and the lower extreme of second diagonal bracing 1002 is fixed firmly on the ground flat car and the opposite side of I-beam bottom flange, and the upper end of second diagonal bracing 1002 supports and holds in the opposite side of I-beam web to prevent I-beam or I-beam unit 310 to take place to topple in the removal process.

Specifically, the second Liang Diaoer is disposed at the front and rear sides of the beam unit, so that in the process of moving the beam unit 310, the second traction rope 930 can be connected with the second Liang Diaoer to achieve traction on the beam unit 310, and before welding the beam units which are sequentially arranged, the second Liang Diaoer between the adjacent beam units is removed and then welded; the first beam lifting lugs 320 are provided at the upper ends of the beam units 310, so that the first traction ropes 520 can facilitate traction of the beam structure 300 by connecting the first beam lifting lugs 320 in the process of moving the beam structure 300.

It will be appreciated that when the length of the wire rope in the lifting apparatus 200 is insufficient, or when the hook size of the wire rope end does not match the first beam lifting lug 320 size of the beam structure 300, as shown in fig. 12, 13, the length of the wire rope in the lifting apparatus 200 may be lengthened by lengthening the rope 1102 and the connection of the extension rope and the hook may be achieved by the hanger 1101 matching the hook size of the wire rope end.

A specific embodiment of the calculation process for calculating some key parameters will now be described.

In order to determine the diameter of the rope 710 and the bearing capacity of the embedded part 730, the following calculation steps are performed:

Step one: the factor of greater than 1 is multiplied by half the total weight of the assembled back beam structure 300 (since the beam structure may tilt during lifting, and is heavy at one end and light at the other end, with a factor of greater than 1 being selected to improve safety). The diameter of the hoisting extension cord 1102 is initially selected.

Step two: the force of the extension cord 1102 is calculated based on the force borne by the lifting apparatus 200, and the diameter of the extension cord 1102 is initially selected, and then the force of the ear panels 630 on both sides and the force of the pre-buried structure 600 connected to the upper building structure 120 are calculated. If the parameters are not matched, the parameters are adjusted to be recalculated.

Step three: according to the force borne by the rope 710, the force of the embedded part 730 is calculated, and the thickness, the material and the welding parameters of each steel plate (the embedded part and the embedded structure are the same, the ear plate and the supporting plate are made of steel plates, hereinafter the steel plates refer to the ear plate and the supporting plate)) of the embedded part 730 are preliminarily assumed, and then the stress of the ear plate (the embedded part and the embedded structure are the same, and the ear plate of the embedded part is referred to as the parameters of the embedded part 730 connected with the upper building structure) are checked. If the parameters are not matched, the parameters are adjusted to be recalculated.

Step four: and checking the result, properly considering the safety coefficient larger than 1, and ensuring the safety.

To facilitate understanding of the above calculation process, an example (mainly calculating the rope and the embedded part between the rope and the building structure above) will now be given, and for the second step, the calculation can be performed in the following manner:

Calculating:

The purpose of calculation is as follows: 1. calculating the diameter of the rope 710; 2. calculating the bearing capacity of the ear plate; 3. calculating the bearing capacity of the embedded part;

Basic conditions: the span of the beam structure is 37m, and the weight of the beam structure is 20 tons; the welding adopts split welding; q345 steel plate; the steel wire rope adopts a steel wire rope with the diameter of 52mm, the weight of the steel wire rope is 11.3KG/m, and the span of the steel wire rope is 17m (namely the distance between two upper building structures); the hoisting equipment is that the hanging point of the electric hoist is at the position of 7 m. The vertical height l1=300 mm between the center of the through hole of the ear plate and the upper end of the supporting plate; the height of the supporting plate in the vertical direction is L2, the height of the ear plate in the vertical direction is L3, and L2=L3=200mm; all steel plates have a thickness of 30mm; shear bearing capacity of steel plate: 170mpa; bearing capacity under bending, tension and compression: 295mpa;

considering hoisting safety, the force on one side is 1.05 (power coefficient) ×200/2×1.2 (expansion coefficient) =126 KN; rope 710 sags 3.5m (due to the suspension of the electric hoist);

step one: selecting the diameter of the extension cord 1102

The load capacity of the extension cord is 126KN, and considering the safety factor of 6 times, according to 126 multiplied by 6=756 KN, the extension cord with the diameter of 40mm is selected to meet the requirement.

Step two: the diameter of the rope 710 is calculated, as well as the bearing capacity of the ear plate and the embedment connected between the ear plate and the superstructure.

1. Calculating the diameter of the rope 710

Looking up the relevant manual, the pulling force of the rope 710 needs to be more than 12.6 tons, and a steel wire rope with the diameter of 52mm is initially selected.

Then the left side: (20-7)/20×126=81.9 Kn

Tangent: tan θ=3.5/7, θ=26.56 ° (rope sagging 3.5m, electric hoist hanging 7m long from rope)

T×sin 26.56=81.9+0.113 x7=82.69 KN (expression 1)

T=184.9kn, considering the safety factor, a wire rope with a diameter of 52mm meets the requirements (a breaking force of 1555KN of 6×39, a safety factor of 8.4).

2. Calculating the bearing capacity of the ear plate of the embedded part (the bearing capacity of the embedded structure can also be calculated by referring to the implementation)

The following are given according to equation 1: vertical shear v= 82.67Kn

The horizontal pulling force is: t=165.3 KN

Bending moment=0.3× 82.67 =24.8 kn.m

Cross-sectional area of the steel sheet: 200×30=6000 mm2

The section moment of inertia of the steel plate=30×200≡3/12=2×10000000mm4

Cross-sectional moment resistance of steel plate=2×10000000/100=200000 mm3

The shear bearing capacity of the steel plate is rechecked: 82.67 ×1000/6000=13.77 mpa, less than 170mpa;

the bending load bearing capacity of the steel plate is rechecked: 24.8x1000x1000/200000=124 mpa, less than 295mpa;

In fact, two blocks are adopted, so that the corresponding bearing capacity under shearing and bending meets the requirement.

Weld joint of embedded part:

the steel plates are connected by adopting equal-strength welding seams, and then the comprehensive stress is as follows: (13.77≡2+124≡2) ≡0.5=124.6 mpa; less than 295mpa; meets the requirements.

The 4 block 1404 steel plate is a further reinforced steel plate.

3. And calculating the bearing capacity of the embedded bars of the embedded part.

The following are given according to equation 1: vertical shear v=184.9 x sin 26.56= 82.67Kn

The horizontal pulling force is: t=184.9×cos 26.56=165.3 KN

The embedded bars adopt 25 HPB300, then: shearing resistance and tensile resistance of single embedded bars: 0.25 x 3.14 x 25 x 25×270=132 KN

Then n1=2 and n2=2 are adopted, and a total of 4 embedded bars meet the requirement. 4×132=528 Kn, more than 165.3Kn, n1=4, n2=4 being practically used.

The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application. Furthermore, embodiments of the application and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. The beam structure hoisting method is characterized by comprising the following steps of:

a foundation point structure is arranged on the building structure above the pre-hoisting layer;

setting a lifting device on the base point structure;

moving the beam structure over the hole;

hoisting the beam structure to the pre-hoisting layer by the hoisting equipment; wherein,

The pre-hoisting layer is a floor where the beam structure needs to be hoisted.

2. The beam structure hoisting method according to claim 1, wherein the step of hoisting the beam structure to the pre-hoisting layer by the hoisting device comprises the steps of:

suspending the beam structure to a corresponding height of the pre-suspending layer by the hoisting equipment;

adjusting the horizontal position of the beam structure by a first traction device;

and installing the beam structure with the adjusted vertical position and horizontal position on the pre-hoisting layer.

3. The beam structure hoisting method according to claim 2, wherein the foundation point structure is a pre-buried structure provided on an upper building structure of the pre-hoisting layer.

4. A method of hoisting a beam structure according to claim 2, characterized in that the foundation point structure comprises ropes arranged on the building structure above the pre-hoisting level, which ropes are used for suspending and guiding the hoisting device.

5. The method of lifting a beam structure according to claim 4, wherein the step of adjusting the horizontal position of the beam structure by means of a first traction device further comprises the steps of:

Pulling the hoisting device along the rope by the first pulling device to adjust the beam structure to a desired horizontal position;

rope clamps are respectively arranged on two sides of the position of the hoisting equipment hung on the rope so as to fix the position of the hoisting equipment.

6. The method of lifting a beam structure according to claim 1, wherein the step of moving the beam structure over the hole further comprises the steps of:

Arranging beam units on the ground at one side of the hole in sequence;

Sequentially welding the beam units to form the beam structure;

and moving the beam structure so that the beam structure is suspended on the ground on two sides above the hole and is positioned below the pre-hoisting layer.

7. The beam structure lifting method according to claim 6, wherein the step of arranging the beam units on the ground at one side of the hole in sequence comprises the steps of:

Placing the beam units on a transport means respectively;

Diagonal bracing structures are arranged on two sides of the beam unit in the width direction, so that the transportation means, the beam unit and the diagonal bracing structures form a moving unit;

and arranging the mobile units orderly by a traction device.

8. The beam structure hoisting method according to claim 7, wherein the transportation means is a ground wagon, and the traction device comprises a second traction device, a fixed pulley assembly and a second traction rope, and the second traction rope is sequentially connected with the output end of the second traction device, the fixed pulley assembly and the moving unit, so that the second traction device can move the moving unit to a required position through the second traction rope and the fixed pulley assembly.

9. The beam structure lifting method according to claim 8, wherein the step of moving the beam structure comprises the steps of:

removing the transport means and the diagonal bracing structure in the middle of the beam structure;

moving one end of the beam structure so that the one end of the beam structure is positioned on the ground at one side of the hole and below one end of the pre-hoisting layer;

and moving the other end of the beam structure so that the other end of the beam structure is positioned on the ground at the other side of the hole and corresponds to the lower part of the other end of the pre-hoisting layer.

10. The beam structure hoisting method according to claim 9, wherein the beam structure is an i-beam, the diagonal brace structure comprises a first diagonal brace group and a second diagonal brace group, the first diagonal brace group comprises a plurality of first diagonal braces, the first diagonal braces are obliquely arranged, the lower ends of the first diagonal braces are fixedly arranged on the ground flat car and are positioned on one side of a lower flange of the i-beam, the upper ends of the first diagonal braces are abutted to one side of a web of the i-beam, the second diagonal brace group comprises a plurality of second diagonal braces, the second diagonal braces are obliquely arranged, the lower ends of the second diagonal braces are fixedly arranged on the ground flat car and are positioned on the other side of the lower flange of the i-beam, and the upper ends of the first diagonal braces are abutted to the other side of the web of the i-beam.