CN107905554A - Fabricated shear wall superimposed sheet connecting integration support system and installation method - Google Patents

Abstract

The invention provides a prefabricated shear wall laminated plate connection integrated support system and its installation method. The prefabricated laminated plate is supported by the nut embedded in the prefabricated shear wall as a fulcrum without depending on the edge of the shear wall. Width, cancel the vertical support of the lower part of the floor, thereby reducing the difficulty of formwork support and saving costs, and can meet the construction accuracy. At the same time, the support of this support structure is concentrated on the top of the structure, without bottom support, there can be a large amount of space for the activities of people at the bottom. The supporting frame of the supporting structure requires few installers, and the on-site operation is relatively simple, which can effectively solve construction problems such as shear wall-laminated slab connection and support slab support.

Description

Prefabricated shear wall laminated plate connection integrated support system and installation method

technical field

The invention belongs to the technical field of building structures, and in particular relates to a prefabricated shear wall laminated plate connection integrated support system and an installation method.

Background technique

With the increasing development of prefabricated buildings, the connection of various components of prefabricated buildings will also become frequent and important. In the connection of prefabricated building structural components, the shear wall-laminated slab connection is a very common existence. In this connection form, one end of the laminated slab is lapped on the edge of the shear wall, the upper part of the slab is lifted by a crane, and the bottom is supported vertically.

However, there are three main problems in the shear wall-laminated slab joint:

First, the problem of the length of the support of the laminated plate. As far as the shear wall is concerned, the protective layer is generally 15-20mm. In the actual structural lap joint, due to many factors such as the size error of the components, the operating level of the construction personnel, and the construction environment on site, it is usually difficult to complete the lap joint accurately and smoothly. It often requires the cooperation of multiple departments and repeated adjustments to achieve Complete, but it is difficult to guarantee the quality of lap joints.

Second, the post-casting problem at the joint after the shear wall-laminated slab is lapped. After the laminated slab is lapped on the shear wall, the side formwork can be applied with cross bolts, but the support of the bottom formwork will be very complicated. If the lap joint quality cannot be guaranteed, the support effect of the bottom formwork cannot be guaranteed, which will ultimately affect node stiffness.

Third, the installation and removal of the vertical support under the laminated slab. In order to ensure safety, the vertical support of laminated slabs is often very complicated, and the installation procedures are many and complicated. At the same time, a large number of vertical supports reduces the activity space at the bottom.

Contents of the invention

Aiming at the above-mentioned technical problems such as insufficient wall lap length at the connection node of the prefabricated shear wall laminated slab, cumbersome installation and removal of the post-casting formwork support at the node, and cumbersome installation and removal of the support under the slab, the present invention provides a method for connecting the prefabricated shear wall laminated slab. The supporting structure and installation method. It is connected to the side of the shear wall through embedded nuts to extend the length of the lap and connect and adjust the formwork support at the top, and has good mechanical performance to meet the requirements of lap precision.

Technical scheme of the present invention is as follows:

The prefabricated shear wall laminated plate connection integrated support system includes a support frame (3) symmetrically arranged on the inner side of the two shear walls (5), and an adjusting bolt ( 4) and support plate (6); two support frames (3) are arranged side by side along the side of the shear wall (5). The section of the support frame (3) is an irregular frame, and its right-angled sides correspond to the (5) and laminated plate (1); Bolt connection holes are set on the right-angled side of the support frame (3) on the side of the shear wall (5), and are connected to the shear force through the bolts matched with the embedded nuts (2). The embedded nut (2) provided on the wall (5); the adjusting bolt (4) is connected to the right angle side of the support frame (3) on the laminated plate (1); when in use, the lower part of the laminated plate (1) The support frame (3) is provided with a support plate (6), and the support frame (3) and the support plate (6) are connected by adjusting bolts (4). By adjusting the distance between the support frame (3) and the support plate (6) Adjust the bolt (4) to adjust the height of the support plate (6).

Further, the support frame (3) is an irregular frame made of equilateral angle steel welded into two long right-angle sides and steel plates, and the two support frames (3) of the same shear wall (5) are adjusted by adjusting bolts (4 ) is connected with the supporting plate (6), thereby supporting the laminated plate (1).

Further, the overall stability is increased by welding two strip-shaped steel plates parallel to the laminated plate (1) between the two support frames (3) on the same shear wall (5). Strip steel plates are welded at 1/3 and 2/3 of the upper height direction.

Further, the support plate (6) is a groove-shaped thick plate welded by steel plates. The bottom of the support plate (6) is double-layered, and an oval-shaped reserved hole with internal threads is left in the middle of the lower layer to connect and adjust bolts (4).

Further, embedded nuts (2) are arranged on the shear wall (5), and the embedded nuts (2) are connected with the support frame (3) through matching bolts, and are used to fix the support frame (3) on the shear wall. Force wall (5).

Further, the support frame (3) is provided with oval-shaped reserved holes on the same straight line, and the supporting bolts of the embedded nuts (2) are connected with the embedded nuts (2) through the reserved holes, and the embedded nuts (2) Connect with the shear wall (5) through U-shaped tendons (7).

Further, the inclination angle of the U-shaped rib (7) relative to the horizontal plane is 30-45°.

Further, the end of the embedded nut (2) that is not connected to the bolt has a stopper (8), and the stopper (8) is arranged in a cross shape along the circumference of the end.

The installation method of the prefabricated shear wall laminated plate connection integrated support system includes the following steps:

a. The pre-embedded nut (2) is pre-embedded in the standard position of the shear wall (5), the shear wall (5) is installed, and the supporting bolts of the pre-embedded nut (2) pass through the support frame (3) The reserved holes are connected with the embedded nuts (2), so that the support frame (3) is fixed on the shear wall (5), and the bolts do not need to be tightened;

b. Use a level to measure the top surface of the support frame (3) to ensure that the gap between the top surfaces of the four support frames (3) is less than 5mm, and then tighten the bolts;

c. Connect the support plate (6) to the support frame (3) through the adjustment bolt (4), and perform the second level measurement;

d. Fine-tune by adjusting the bolt (4), and then measure the two support plates (6) with a level gauge to ensure that the error range is within 5mm;

e. Lift the laminated board (1) and place it on the support board (6), and place the wooden strips at the same height as the support board (6) at the right angles of the support frame (3) to prevent the grout leakage of the node pouring, and then Pour the joints of the laminated slab (1) and the shear wall (5);

f. When the joint reaches the strength required by the specification, the supporting frame (3) can be removed. When removing, first loosen the adjusting bolt (4), then take out the supporting plate (6) and wooden strips, and remove the two supporting frames ( 3) Connect two strips of steel plates, and finally remove the support frame (3);

g. Seal the embedded nut (2) with plastic bolts for the next use.

Compared with prior art, the beneficial effect of the present invention is:

1. The present invention uses the nut embedded in the prefabricated shear wall as a fulcrum at the junction of the shear wall and the laminated slab in the prefabricated concrete building to support the prefabricated laminated slab, which does not depend on the edge width of the shear wall and cancels The lower part of the floor is supported vertically, thereby reducing the difficulty of formwork support and saving costs, and can meet the construction accuracy. At the same time, the support of this support structure is concentrated on the top of the structure, without bottom support, there can be a large amount of space for the activities of people at the bottom. The support frame of the support structure requires few installers, and the on-site operation is relatively simple, which can effectively solve construction problems such as shear wall-laminated slab connection and support slab support.

2. The present invention is aimed at prefabricated buildings, and the problem of formwork support at post-cast joints of shear walls and laminated slabs can be completed at one time by adopting the structure of the present invention. The on-site operation is simple, and it can effectively solve the problems of construction difficulties when wallboards are lapped, reinforcement, support, and removal of post-cast joint formwork. On the premise of a reasonable structure, the entire supporting structure has the necessary bearing capacity and rigidity, and meets the safety requirements of on-site construction.

Description of drawings

Fig. 1 is a schematic diagram of the connection between the bracing frame of the present invention and the laminated slab of the shear wall.

Fig. 2 is a sectional view of A-A in Fig. 1 .

Fig. 3 is a schematic diagram of the installation of the present invention between two shear walls.

Fig. 4 is a schematic structural view of the support frame of the present invention.

Fig. 5 is a left side view of Fig. 4 .

Fig. 6 is a top view of a shear wall support frame and a support plate on one side of the present invention.

Fig. 7 is a structural schematic diagram of the connection between the support plate and the adjusting bolt in Fig. 1 .

Fig. 8 is a plan view of the adjusting bolt cap in Fig. 7 .

Fig. 9 is a plan view of the adjusting bolt in Fig. 7 .

Fig. 10 is a plan view of the embedded nut 2 of the present invention.

Fig. 11 is a plan view of the cross-shaped stopper 8 where the embedded nut 2 is not connected to the bolt end.

Figure 12 is a top view of the support frame and the support plate between the two shear walls.

Fig. 13 is a schematic diagram of the standard position of the embedded nut 2 of the present invention installed in the shear wall.

In the figure: 1. Laminated plate, 2. Embedded nut, 3. Support frame, 4. Adjusting bolt, 5. Shear wall, 6. Support plate, 7. U-shaped rib, 8. Block.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1

As shown in Figures 1 to 6, an integrated support system for the connection of assembled shear wall laminated slabs according to the present invention includes a support frame 3 symmetrically arranged on one side of the shear wall 5, and between the support frame 3 and the laminated slab 1 Adjusting bolts 4 and support plates 6 are set, and two support frames 3 are arranged side by side along each side of the shear wall 5. The cross section of the support frame 3 is an irregular frame, and its right-angled sides correspond to the shear wall 5 and the laminated plate 1 respectively. , the right-angled side opposite to the shear wall 5 is provided with a bolt connection reserved hole, which is connected to the embedded nut 2 provided on the side of the shear wall 5 through bolts; the adjusting bolt 4 is connected to the right-angled side of the laminated plate 1, During use, the adjustment bolt 4 on the support frame 3 on the same side of the shear wall 5 is connected to the support plate 6, and the laminated plate 1 is placed above the support plate 6 on the two adjacent support frames 3 of the shear wall 5 on one side. The adjusting bolt 4 between the support plate 6 and the support frame 3 adjusts the height of the support plate 6 .

As shown in Figures 4-6, the support frame 3 is composed of two irregular frames connected by connecting plates to form a whole, the right-angled sides of the irregular frames are welded by equilateral angle steel, and the others are made of steel plates Welding; the support frame 3 is used to support the upper laminated plate 1 .

As shown in FIGS. 7-9 , the adjusting bolt 4 is installed between the support plate 6 and the support frame 3 , and the level of the support plate 6 can be fine-tuned by adjusting the height of the adjusting bolt 4 .

As shown in Fig. 1, Fig. 12 and Fig. 13, the outer periphery of the embedded nut 2 provided on the shear wall 5 is also respectively provided with symmetrically inclined U-shaped ribs 7 for reinforcement; the U-shaped ribs 7 are inclined relative to the horizontal plane. The angle is 30-45°, and 45° is selected in this example.

As shown in Figure 1, four embedded nuts 2 are arranged on each side of the shear wall 5, and the embedded nuts 2 on both sides are located on the same horizontal line; On the nut 2, the load on the laminated plate 1 is transmitted to the embedded nut 2 through the support frame 3, and further transmitted to the shear wall 5; there are two connection holes for the embedded nut 2 on the support frame 3, and the appropriate embedded nut is selected 2. Use the bolts matched with the embedded nut 2 to connect the embedded nut 2 through the reserved hole at the corresponding position, so as to fix the support frame 3; a single connection hole for the embedded nut 2 can ensure convenient construction, but there is a support frame 3 to rotate However, when there are too many connecting holes of the embedded nut 2, it will undoubtedly increase the difficulty of connecting the connecting holes of the embedded nut 2 during construction. Therefore, the use of oval-shaped embedded nut 2 connecting holes can prevent the rotation of the support frame 3 , the height of the support frame 3 can also be fine-tuned, and the construction difficulty can be effectively reduced.

As shown in Fig. 2 and Fig. 3, the use method of the support frame 3 for the connection of the assembled shear wall laminated slabs of the present invention includes the following steps:

(1) The supporting frame 3 is symmetrically arranged on both sides of the shear wall 5, and one side of the supporting frame 3 is respectively connected to the side of the shear wall 5 through the matching bolts of the embedded nut 2. The bolts do not need to be tightened fixed;

(2) Measure the top surface of the support frame 3 with a level gauge to ensure that the gap between the top surfaces of the four support frames 3 is less than 5mm, and then tighten the bolts;

(3) Connect the support plate 6 to the support frame 3 through the adjusting bolt 4, place the support plate 6 on the two support frames 3, and then perform the second level measurement;

(4) Fine-tune by adjusting the bolt 4 to ensure that the support plate 6 is parallel to the floor;

(5) Hoist the laminated slab 1 and place it on the support plate 6, connect the laminated slab 1 and the 5 nodes of the shear wall, and perform pouring.

When the poured joint reaches the strength required by the code, the support structure shall be removed; the method is as follows:

(1) Loosen the adjusting bolt 4 on the support plate 6 and remove the support plate 6;

(2) Loosen the embedded nut 2 connecting the support frame 3 with the shear wall 5 and the supporting bolts of the embedded nut 2, and remove the support frame 3.

The force transmission path of the present invention is: from the laminated plate 1 to the support frame 3, then from the support frame 3 to the embedded nut 2, and from the embedded nut 2 to the shear wall 5. Therefore, the bearing capacity of the support frame 3 depends on the self-strength of the embedded nut 2 and the concrete strength at the embedded nut 2. In order to make the embedded nut 2 mainly bear the force of drawing, the adjusting bolt 4 and the support plate 6 are arranged on the The far end of the scaffolding system; at the same time, the pre-embedded bolts at the 5 places of the shear wall are reinforced with U-shaped ribs 7 .

Example 2

The difference between this example and Example 1 is that the outer periphery of the embedded nut 2 provided on the shear wall 5 in this example is provided with a U-shaped rib 7 with an inclination angle of 30° relative to the horizontal plane. What the support plate 6 of this example adopted was a channel frame made by welding steel plates. As shown in Fig. 10 and Fig. 11, the end of the pre-embedded nut 2 described in this example which is not connected to the bolt has a stopper 8, and the stopper 8 is arranged along the circumference of the end in a cross-shaped structure, which is convenient for installation and fixation.

Example 3

The difference between this example and Example 1 is that the outer periphery of the embedded nut 2 provided on the composite beam 5 in this example is provided with a U-shaped rib 7 with an inclination angle of 40° relative to the horizontal plane.

Claims (9)

1. The integrated support system for the connection of laminated plates of prefabricated shear walls is characterized in that it includes support frames (3) symmetrically arranged on the inner sides of the two shear walls (5), and the support frame (3) and the laminated plates (1) Adjusting bolts (4) and supporting plates (6) arranged between them; two supporting frames (3) are arranged side by side along the side of the shear wall (5), and the section of the supporting frame (3) is an irregular frame, and its right The sides correspond to the shear wall (5) and the laminated plate (1); bolt connection holes are set on the right-angle side of the support frame (3) on the side of the shear wall (5), and are matched with the embedded nuts (2). The bolts are connected to the pre-embedded nuts (2) set on the shear wall (5); the adjustment bolts (4) are connected to the right-angled side of the support frame (3) on the laminated plate (1); when in use, the laminated The support frame (3) under the plywood (1) is provided with a support plate (6), and the support frame (3) and the support plate (6) are connected by adjusting bolts (4). By adjusting the support frame (3) and the support Adjusting bolts (4) between the plates (6) adjust the height of the support plate (6). 2. The prefabricated shear wall laminated slab connection integrated support system according to claim 1, characterized in that: the support frame (3) is formed by welding equilateral angle steel into two long right-angle sides and steel plates In an irregular frame, the two support frames (3) of the same shear wall (5) are connected to the support plate (6) through adjusting bolts (4), thereby supporting the laminated plate (1). 3. The prefabricated shear wall laminated plate connection integrated support system according to claim 1, characterized in that: the two support frames (3) on the same shear wall (5) are welded between two parallel The strip-shaped steel plates of the laminated plate (1) are used to increase the overall stability, and the strip-shaped steel plates are welded at 1/3 and 2/3 of the height direction of the support frame (3). 4. The prefabricated shear wall laminated plate connection integrated support system according to claim 1, characterized in that: the support plate (6) is a groove-shaped thick plate welded by steel plates, and the support plate (6) The bottom is double-layered, and an oval-shaped reserved hole with internal thread is left in the middle of the lower layer for connecting the adjusting bolt (4). 5. The prefabricated shear wall laminated plate connection integrated support system according to claim 1, characterized in that: the shear wall (5) is provided with embedded nuts (2), and the embedded nuts (2) pass through Matching bolts are connected with the support frame (3) for fixing the support frame (3) on the shear wall (5). 6. The prefabricated shear wall laminated plate connection integrated support system according to claim 1, characterized in that: the support frame (3) is provided with oval-shaped reserved holes on the same straight line, pre-buried The supporting bolts of the nut (2) are connected with the embedded nut (2) through the reserved hole, and the embedded nut (2) is connected with the shear wall (5) through the U-shaped rib (7). 7. The prefabricated shear wall laminated slab connection integrated support system according to claim 6, characterized in that: the inclination angle of the U-shaped rib (7) relative to the horizontal plane is 30-45°. 8. The prefabricated shear wall laminated plate connection integrated support system according to claim 1, characterized in that: the end of the embedded nut (2) that is not connected to the bolt has a stopper (8), and the stopper (8) It is arranged in a cross shape along the circumference of the end. 9. The installation method of the integrated support system for the connection of prefabricated shear wall laminated plates, which is characterized in that it includes the following steps: a. The pre-embedded nut (2) is pre-embedded in the standard position of the shear wall (5), the shear wall (5) is installed, and the supporting bolts of the pre-embedded nut (2) pass through the support frame (3) The reserved holes are connected with the embedded nuts (2), so that the support frame (3) is fixed on the shear wall (5), and the bolts do not need to be tightened; b. Use a level to measure the top surface of the support frame (3) to ensure that the gap between the top surfaces of the four support frames (3) is less than 5mm, and then tighten the bolts; c. Connect the support plate (6) to the support frame (3) through the adjustment bolt (4), and perform the second level measurement; d. Fine-tune by adjusting the bolt (4), and then measure the two support plates (6) with a level gauge to ensure that the error range is within 5mm; e. Lift the laminated board (1) and place it on the support board (6), and place the wooden strips at the same height as the support board (6) at the right angles of the support frame (3) to prevent the grout leakage of the node pouring, and then Pour the joints of the laminated slab (1) and the shear wall (5); f. When the joint reaches the strength required by the specification, the supporting frame (3) can be removed. When removing, first loosen the adjusting bolt (4), then take out the supporting plate (6) and wooden strips, and remove the two supporting frames ( 3) Connect two strips of steel plates, and finally remove the support frame (3); g. Seal the embedded nut (2) with plastic bolts for the next use.