CN111764289B - Cast-in-situ suspension bracket with overhanging light structure and use method thereof - Google Patents
Cast-in-situ suspension bracket with overhanging light structure and use method thereof Download PDFInfo
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- CN111764289B CN111764289B CN202010589284.8A CN202010589284A CN111764289B CN 111764289 B CN111764289 B CN 111764289B CN 202010589284 A CN202010589284 A CN 202010589284A CN 111764289 B CN111764289 B CN 111764289B
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- 239000000725 suspension Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000011065 in-situ storage Methods 0.000 title description 19
- 238000009826 distribution Methods 0.000 claims description 35
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- 238000005452 bending Methods 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000004746 geotextile Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims 7
- 239000002002 slurry Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 21
- 239000000463 material Substances 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 abstract description 3
- 238000011900 installation process Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 2
- 238000012876 topography Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
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- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
本发明公开了一种悬挑轻结构现浇悬挂支架及其使用方法，针对U梁顶角处的特殊形态设计L型承重管套设在三角架上作为整个悬挂支架的支撑体系，对三角架起到限位、支撑的作用并将竖直及水平方向的受力传递给U梁，可拆卸地将三角架固定在U梁腹板外侧用以铺设底模、浇筑桥面板，待桥面板浇筑完成后，只需拧开限位螺栓、切割连接筋就能拆除L型承重管、三角架，整体材料设备投入小，同时引入吊绳在安装过程中保护三角架、在拆卸时牵引回收三角架，整个施工过程便捷、灵活、高效，还针对性地解决了马来西亚等国家不允许使用吊篮进行高空作业的法律要求，能够适应复杂、危险地形的桥梁施工，显著提高了施工作业的安全性。
The present invention discloses a cantilever light structure cast-in-place suspension bracket and a use method thereof. According to the special form of the top corner of the U-beam, an L-shaped load-bearing pipe sleeve is designed and arranged on a tripod as a support system of the entire suspension bracket, which plays a role of limiting and supporting the tripod and transmits the forces in the vertical and horizontal directions to the U-beam. The tripod is detachably fixed to the outer side of the web of the U-beam for laying the bottom mold and casting the bridge deck. After the casting of the bridge deck is completed, the L-shaped load-bearing pipe and the tripod can be removed by only unscrewing the limit bolts and cutting the connecting ribs. The overall material and equipment investment is small. At the same time, a suspension rope is introduced to protect the tripod during the installation process and to pull and recover the tripod during disassembly. The entire construction process is convenient, flexible and efficient. It also specifically solves the legal requirements of countries such as Malaysia that do not allow the use of hanging baskets for high-altitude operations. It can adapt to bridge construction in complex and dangerous terrains and significantly improves the safety of construction operations.
Description
Technical Field
The invention relates to the technical field of bridge construction. More particularly, the invention relates to a cast-in-situ suspension bracket with a cantilever light structure and a use method thereof.
Background
The conventional cast-in-situ bracket is cast-in-situ by a traditional hanging die in China, mainly comprises section steel as an upper bearing beam and a lower bearing beam, wherein the section steel is connected with the upper bearing beam and the lower bearing beam through hanging rods, a distribution beam and a bottom die are paved on the lower bearing beam for cast-in-situ, a traditional tripod in foreign countries such as malaysia is cast-in-situ, the tripod is mainly formed by welding flat iron and steel with a mouth, the tripod is fixed to a U beam web through expansion bolts, and the distribution beam and the bottom die are paved on the tripod for cast-in-situ work. The conventional cast-in-situ brackets are required to assist in construction by a ladder truck and a crane in the mounting and dismantling processes, the construction efficiency is low, and according to Malaysia law, the basket is not allowed to be used for high-altitude operation, and because the topography condition of a mountain area is limited, part of bridge construction areas are positioned in the mountain area and span the existing expressway and MRT, and the construction of the ladder truck and the crane cannot be satisfied. The upper structure of the bridge ramp in Malaysia is mainly a prefabricated U beam with a notch at the top angle, and the edge beam is designed without a flange plate, and the bridge deck is cast-in-situ on the U beam, so that the construction of a cast-in-situ bracket is carried out aiming at a specific U beam structure, and the requirement of not using equipment such as a hanging basket, a crane and the like is met.
Disclosure of Invention
It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.
The invention also aims to provide the overhanging light-structure cast-in-situ suspension bracket and the application method thereof, which solve the technical problems of inconvenient installation and detachment and low construction efficiency of the existing cast-in-situ suspension bracket.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a cantilever light structure cast-in-place suspension bracket comprising:
the L-shaped bearing pipes are respectively arranged at the top corners of the U beams and are uniformly distributed along the length direction of the U beams, the top corners of the U beams are outwards provided with notches along the length direction of the U beams, the L-shaped bearing pipes are provided with horizontal parts and vertical parts, the horizontal parts of the L-shaped bearing pipes are perpendicular to the length direction of the U beams, one ends of the L-shaped bearing pipes far away from the vertical parts are positioned in the notches, the vertical parts are provided with through holes vertical to the directions, the length of the vertical parts is slightly larger than the pouring thickness of bridge decks on the U beams, the side walls of the vertical parts above the pouring thickness of the bridge decks are horizontally provided with bolt holes communicated with the through holes, and the bolt holes are internally provided with limiting bolts;
The triangular supports are respectively arranged corresponding to one L-shaped bearing tube and comprise a first supporting rod, a second supporting rod and a third supporting rod which are sequentially and fixedly connected, wherein the second supporting rod is horizontally arranged, the first supporting rod is vertically arranged, the upper end of the first supporting rod extends upwards out of the second supporting rod and then upwards penetrates out of the through hole, the third supporting rod is fixedly connected with the lower end of the first supporting rod, and a bearing block is welded on the side wall of the upper end of the first supporting rod, which is positioned outside the through hole;
The plurality of gate-type embedded ribs are vertically arranged on one end, close to the L-shaped bearing tube, of the upper surface of the U beam respectively and are uniformly distributed along the length direction of the U beam, two ends of each gate-type embedded rib are embedded and fixed in the U beam, and the plane direction of each gate-type embedded rib is the same as the width direction of the U beam;
The upper ends of the connecting ribs are first U-shaped bent parts which face the U-beam in the notch direction and are horizontally arranged, two ends of each first U-shaped bent part are respectively bent downwards twice to form second U-shaped bent parts, the notch direction of each second U-shaped bent part is opposite to the U-beam, and each first supporting rod is positioned at the bottom of the notch of one first U-shaped bent part;
the tensile bars are horizontally arranged and two ends of the tensile bars are respectively inserted into the notches of the two second U-shaped bending parts of one connecting bar, and each tensile bar is also respectively positioned in the notch of the door-shaped embedded bar at the corresponding position on the U beam.
Preferably, the side wall of the first support rod above the bearing block is also provided with a pair of opposite perforations, and a safety pin is penetrated in the pair of opposite perforations.
Preferably, at least 2 pre-buried bars of door type are provided corresponding to each connecting bar, and the tensile bars corresponding to each connecting bar penetrate into the notch of 2 pre-buried bars of door type and the notch of two second U-shaped bending parts of the connecting bar at the same time.
Preferably, a supporting leg is further arranged at the bottom of the tripod, one end of the supporting leg is fixedly connected with the lower end of the first supporting rod, and the other end of the supporting leg is abutted to the surface of the web plate of the U beam.
Preferably, the tripod is formed by machining steel with a mouth of 50mm 25mm 3mm, the bearing block is made of flat iron with a mouth of 50mm 20mm 6mm, the L-shaped bearing tube is made of steel with a mouth of 65mm 35mm 3mm, and the length of the limit bolt is 25mm.
The invention also provides a use method of the overhanging light structure cast-in-situ suspension bracket, which comprises the following steps:
S1, uniformly arranging a plurality of gate-type embedded ribs along the length direction of a U beam on one side of the upper surface of the U beam, which is close to a position to be installed, wherein the gate-type embedded ribs are vertically arranged and are positioned in the same plane direction as the width direction of the U beam, the vertex angle of the U beam is provided with a notch which is outwards opened, and the notch extends along the length direction of the U beam;
S2, respectively binding a lifting rope on a gate-type embedded rib corresponding to each tripod to-be-installed position, binding and fixing the other end of the lifting rope with one end of the tripod far away from the U beam, sleeving an L-shaped bearing tube at the upper end of the tripod and relatively fixing the L-shaped bearing tube and the tripod, integrally hanging the L-shaped bearing tube and the tripod to the outer side of a web plate of the U beam, and vertically installing the L-shaped bearing tube at the vertex angle of the U beam, wherein the horizontal part of the L-shaped bearing tube is vertical to the length direction of the U beam, and one end of the horizontal part far away from the vertical part is positioned in a notch and is in contact with the surface of the notch;
s3, hooking the vertical part of the L-shaped bearing pipe by using the first U-shaped bending part of the connecting rib, then inserting a tensile steel bar in the second U-shaped bending part of the connecting rib, inserting the tensile steel bar into the notch of the door-shaped embedded rib at the corresponding position, and respectively closely contacting the L-shaped bearing pipe with the connecting rib, the tensile steel bar with the connecting rib and the tensile steel bar with the door-shaped embedded rib, so as to provide a supporting force for the L-shaped bearing pipe in the horizontal direction;
S4, arranging a row of distribution beams on the second support rods of all the triangular frames at intervals, wherein the length directions of the distribution beams are consistent with the length directions of the U beams, paving bottom dies on all the distribution beams, pouring bridge decks after paving the bottom dies, and setting protection areas for the L-shaped bearing pipes to prevent cement paste from entering the L-shaped bearing pipes during pouring;
s5, after pouring of the bridge deck, the bottom die and the distribution beam are sequentially removed, then the tripod and the L-shaped bearing pipes are released from fixation, the tripod is pulled from the outer side of the bridge deck to be retrieved after being completely separated from the L-shaped bearing pipes by utilizing the lifting ropes to drop the tripod, then all the connecting ribs are cut, all the L-shaped bearing pipes are taken out, and finally all the lifting ropes are recovered.
Preferably, in step S1, when the L-shaped load-bearing tube is sleeved at the upper end of the tripod and is fixed relatively, the first support rod of the tripod vertically penetrates out of the through hole of the L-shaped load-bearing tube upwards until the bearing block is positioned above the L-shaped load-bearing tube, then the position of the tripod is adjusted to enable the bearing block to be in full contact with the top end surface of the L-shaped load-bearing tube, then the limit bolt is screwed down, and when the tripod is released from the L-shaped load-bearing tube, the limit bolt is unscrewed first, and then the position of the tripod is adjusted to enable the first support rod with the bearing block to be moved out of the through hole of the L-shaped load-bearing tube downwards.
Preferably, a pair of opposite through holes are formed in the side wall of the tripod above the bearing block, a safety pin is penetrated through the opposite through holes, and when the tripod is released from the L-shaped bearing pipe, the safety pin is pulled out first and then the limit bolt is unscrewed.
Preferably, when the protection area is set for the L-shaped bearing tube in the step S4, a PVC pipe is sleeved on the L-shaped bearing tube, and then geotextile is filled in the PVC pipe.
Preferably, before setting up the distribution beam and laying the die block, welding a lug respectively at the both ends of every distribution beam earlier, open a hole in the outside of die block, connect a lifting rope respectively in every lug, the downthehole of die block, the other end and the pre-buried muscle fixed connection of a door-type of corresponding position of lifting rope, when demolishing die block and distribution beam, utilize the lifting rope to pull die block and distribution beam outwards along the width direction of U roof beam in proper order until completely leaving the bottom of decking, pull to retrieve die block and distribution beam on the decking again.
The cantilever light-structure cast-in-situ suspension bracket and the use method thereof have the advantages that the L-shaped bearing tube is designed to be used as a supporting system of the whole suspension bracket aiming at the special form of the U Liang Dingjiao, the triangular bracket plays a role in limiting and supporting and transmits the stress in the vertical direction and the horizontal direction to the U beam, the through holes and the limiting bolts are arranged on the L-shaped bearing tube, the triangular bracket is detachably fixed on the outer side of a U beam web and used for paving a bottom die and pouring a bridge deck, after the bridge deck is poured, the L-shaped bearing tube and the triangular bracket can be removed only by unscrewing the limiting bolts and cutting connecting ribs, the investment of integral material equipment is small, meanwhile, the triangular bracket in the installation process is prevented from falling accidentally by introducing a lifting rope in the construction process, the triangular bracket is pulled away from the bottom of the bridge deck by the lifting and recycling in the disassembly process, the whole construction process is convenient, flexible and efficient, the national requirements of not allowing overhead operation by using the lifting basket to be carried out in the malaysia state are also solved, and the safety requirements of bridge construction operation on dangerous topography are remarkably improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a front view block diagram of the present invention;
FIG. 2 is a side elevational view of the present invention disposed on a U-beam;
FIG. 3 is an enlarged block diagram of the present invention at A in FIG. 1;
FIG. 4 is a top view of the connecting bar of the present invention;
FIG. 5 is a side view of the upper end of the first support bar of the present invention;
fig. 6 is a front view of the L-shaped load bearing tube of the present invention.
The specification reference numerals indicate that 1, U-beam, 2, notch, 3, bridge deck, 4, horizontal part, 5, vertical part, 6, through hole, 7, bolt hole, 8, limit bolt, 9, tripod, 10, first support bar, 11, second support bar, 12, third support bar, 13, bearing block, 14, door-type embedded rib, 15, connecting rib, 16, first U-shaped bending part, 17, second U-shaped bending part, 18, tensile reinforcement, 19, opposite perforation, 20, safety pin, 21, supporting leg, 22, lifting rope, 23, distribution beam, 24, bottom die, 25, protection area, 26, lifting lug.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It should be noted that, in the following embodiments, unless otherwise specified, the experimental methods are conventional methods, and the reagents and materials are commercially available, unless otherwise specified, and in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
As shown in fig. 1 to 6, the present invention provides a cast-in-situ suspension bracket of a cantilever light structure, comprising:
The U-shaped beam comprises a plurality of L-shaped bearing pipes which are respectively arranged at the top angle of the U-shaped beam 1 and uniformly distributed along the length direction of the U-shaped beam 1, wherein a notch 2 is outwards formed at the top angle of the U-shaped beam 1 along the length direction of the U-shaped beam 1, the L-shaped bearing pipes are provided with a horizontal part 4 and a vertical part 5,L, the horizontal part 4 of the L-shaped bearing pipes is perpendicular to the length direction of the U-shaped beam 1, one end far away from the vertical part 5 is positioned in the notch 2, the vertical part 5 is provided with a through hole 6 in the direction, the length of the through hole is slightly greater than the pouring thickness of a bridge deck 3 on the U-shaped beam 1, a bolt hole 7 communicated with the through hole 6 is horizontally formed in the side wall of the vertical part 5, and a limit bolt 8 is arranged in the bolt hole 7;
The triangular frames 9 are respectively arranged corresponding to one L-shaped bearing tube, each triangular frame 9 comprises a first supporting rod 10, a second supporting rod 11 and a third supporting rod 12 which are sequentially and fixedly connected, each second supporting rod 11 is horizontally arranged, each first supporting rod 10 is vertically arranged, the upper end of each first supporting rod extends upwards out of the corresponding second supporting rod 11 and then upwards penetrates out of the corresponding through hole 6, each third supporting rod 12 is fixedly connected with the lower end of each first supporting rod 10, and a bearing block 13 is welded on the side wall, located outside the corresponding through hole 6, of the upper end of each first supporting rod 10;
the plurality of gate-type embedded ribs 14 are vertically arranged on one end, close to the L-shaped bearing tube, of the upper surface of the U beam 1 respectively and are uniformly distributed along the length direction of the U beam 1, two ends of each gate-type embedded rib 14 are embedded and fixed in the U beam 1, and the plane direction of each gate-type embedded rib 14 is the same as the width direction of the U beam 1;
the connecting ribs 15 are respectively arranged corresponding to one L-shaped bearing tube, the upper ends of the connecting ribs 15 are first U-shaped bent parts 16 which face the U-beam 1 in the notch direction and are horizontally arranged, two ends of each first U-shaped bent part 16 are respectively bent downwards twice to form second U-shaped bent parts 17 of which the notch direction is opposite to the U-beam 1, and each first supporting rod 10 is positioned at the bottom of the notch of one first U-shaped bent part 16;
the tensile bars 18 are horizontally arranged, two ends of each tensile bar 18 are respectively inserted into the notches of the two second U-shaped bending parts 17 of one connecting bar 15, and each tensile bar 18 is also respectively positioned in the notch of the corresponding gate-type embedded bar 14 on the U beam 1.
When the overhanging light-structure cast-in-situ suspension bracket is used, the concrete steps are as follows:
S1, a plurality of gate-type embedded ribs are uniformly arranged on one side, close to the position to be installed, of the upper surface of the U beam along the length direction of the U beam, the gate-type embedded ribs are vertically arranged, the plane direction of the gate-type embedded ribs is identical to the width direction of the U beam, the vertex angle of the U beam is provided with an outwards-opened notch, and the notch extends along the length direction of the U beam.
S2, sleeving the L-shaped bearing tube at the upper end of the tripod and fixing the L-shaped bearing tube relatively, specifically, enabling the first supporting rod of the tripod to vertically upwards penetrate through the through hole of the L-shaped bearing tube until the bearing block is located above the L-shaped bearing tube, then adjusting the position of the tripod to enable the bearing block to just rest at the top end of the L-shaped bearing tube, screwing the limit bolt to limit the tripod, guaranteeing that the L-shaped bearing tube is fully contacted with the bearing block on the tripod to play a force transmission role, then hanging the L-shaped bearing tube and the tripod to the outer side of the web plate of the U beam integrally, and vertically installing a plurality of L-shaped bearing tubes at the top angle of the U beam, wherein the horizontal part of the L-shaped bearing tube is perpendicular to the length direction of the U beam, and one end of the horizontal part far away from the vertical part is located in the notch and is in contact with the surface of the notch.
S3, the vertical part of the L-shaped bearing pipe is hooked by using the first U-shaped bending part of the connecting rib, then a tensile steel bar is inserted into the second U-shaped bending part of the connecting rib, and meanwhile the tensile steel bar is inserted into the notch of the door-shaped embedded rib at the corresponding position, and the L-shaped bearing pipe is in close contact with the connecting rib, the tensile steel bar is in close contact with the connecting rib, and the tensile steel bar is in close contact with the door-shaped embedded rib, so that a supporting force in the horizontal direction is provided for the L-shaped bearing pipe.
S4, a row of distribution beams are arranged on the second support rods of all the triangular frames at intervals, the length directions of the distribution beams are consistent with the length directions of the U beams, bottom dies are paved on all the distribution beams, after the bottom dies are paved, bridge decks are poured, and protective measures are taken for the L-shaped bearing pipes to prevent cement paste from entering the L-shaped bearing pipes during pouring.
S5, after pouring of the bridge deck, the bottom die and the distribution beam are removed in sequence, then the tripod and the L-shaped bearing pipes are released from fixation, the tripod is recovered, then all connecting ribs are cut, and all the L-shaped bearing pipes are taken out.
According to the overhanging light-structure cast-in-place suspension bracket, an L-shaped bearing tube is designed for a special form at a U Liang Dingjiao part to serve as a supporting system of the whole suspension bracket, through holes and limit bolts are arranged on the L-shaped bearing tube, a tripod is detachably fixed on the outer side of a U-beam web for paving a bottom die and pouring a bridge deck, the L-shaped bearing tube plays a role in limiting and supporting the tripod, then the stress in the vertical direction and the horizontal direction is transmitted to the U-beam, after the bridge deck is poured, connecting ribs, tensile steel bars and gate-type embedded ribs are reserved in the bridge deck to strengthen the internal shearing strength of the bridge deck, meanwhile, the gate-type embedded ribs are matched with the connecting ribs and the tensile steel bars to play a role in transversely supporting and stabilizing the L-shaped bearing tube and the tripod, when the device is required to be disassembled, the L-shaped bearing tube and the tripod can be disassembled only by unscrewing the limit bolts and cutting the connecting ribs, so that the whole material equipment investment is small, the safety and the flexibility are simple, and the construction operation efficiency are high.
In another technical solution, as shown in fig. 1,2,3 and 5, a pair of holes 19 is further formed on the side wall of the first support rod 10 above the bearing block 13, and a safety pin 20 is inserted into the pair of holes 19.
The safety pin is additionally arranged at the top of the tripod and is used for providing double safety of vertical supporting force for the tripod when the tripod is hung and dismantled during installation, so that the hidden danger that the whole tripod leaves the through hole of the L-shaped bearing tube due to the fact that the limit bolt is not locked or the bearing block is not completely contacted with the top of the L-shaped bearing tube to slide is avoided.
In another technical solution, as shown in fig. 1 and 3, at least 2 door-shaped embedded bars 14 are provided corresponding to each connecting bar 15, and the tensile bars 18 corresponding to each connecting bar 15 simultaneously penetrate into the notches of the 2 door-shaped embedded bars 14 and the notches of the two second U-shaped bent portions 17 of the connecting bar 15. Every two gate-type embedded bars are arranged to balance the stress at two ends of one tensile bar respectively.
In another technical scheme, as shown in fig. 1, a supporting leg 21 is further disposed at the bottom of the tripod 9, one end of the supporting leg 21 is fixedly connected with the lower end of the first supporting rod 10, and the other end of the supporting leg abuts against the web surface of the U beam 1.
The support feet are welded at the bottom of the tripod and used for adjusting the transverse gradient and further stabilizing the tripod.
In another technical scheme, as shown in fig. 1 and 3, the tripod 9 is formed by machining 50mm 25mm 3mm steel, the bearing block 13 is 50mm 20mm 6mm flat iron, the L-shaped bearing tube is 65mm 35mm 3mm steel, and the limit bolt 8 is 25mm long.
The rigid supporting force is provided by utilizing the processing and forming of the square steel, the integral light weight of the overhanging light-structure cast-in-situ suspension bracket is facilitated, the transportation and the position adjustment are facilitated, the specifications of the square steel, the flat iron and the limit bolt are common, the materials are conveniently obtained, the production cost is reduced, and the construction efficiency is improved.
The invention also provides a use method of the overhanging light structure cast-in-situ suspension bracket, which is shown in combination with fig. 1 to 6, and comprises the following steps:
S1, uniformly arranging a plurality of gate-type embedded ribs 14 along the length direction of the U beam 1 on one side, close to the position to be installed, of the upper surface of the U beam 1, wherein the gate-type embedded ribs 14 are vertically arranged and are located in the same plane direction as the width direction of the U beam 1, a notch 2 which is outwards formed in the vertex angle of the U beam 1 is formed, and the notch 2 extends along the length direction of the U beam 1;
S2, respectively binding a lifting rope 22 on a gate-type embedded rib 14 corresponding to the position to be installed of each tripod 9, binding and fixing the other end of the lifting rope 22 and one end of the tripod 9 far away from the U beam 1, sleeving an L-shaped bearing tube at the upper end of the tripod 9 and relatively fixing the L-shaped bearing tube, integrally hanging the tripod 9 to the outer side of a web plate of the U beam 1, and vertically installing the L-shaped bearing tube at the top angle of the U beam 1, wherein the horizontal part 4 of the L-shaped bearing tube is perpendicular to the length direction of the U beam 1, and one end of the horizontal part 4 far away from the vertical part 5 is positioned in the notch 2 and is in contact with the surface of the notch 2;
S3, hooking the vertical part 5 of the L-shaped bearing pipe by using the first U-shaped bending part 16 of the connecting rib 15, then inserting a tensile steel bar 18 in the second U-shaped bending part 17 of the connecting rib 15, inserting the tensile steel bar 18 into a notch of the door-shaped embedded rib 14 at a corresponding position, and tightly contacting the L-shaped bearing pipe with the connecting rib 15, the tensile steel bar 18 with the connecting rib 15 and the tensile steel bar 18 with the door-shaped embedded rib 14 respectively, so as to provide a supporting force for the L-shaped bearing pipe in the horizontal direction;
S4, arranging a row of distribution beams 23 on the second support rods 11 of all the triangular frames 9 at intervals, wherein the length direction of the distribution beams 23 is consistent with the length direction of the U-shaped beams 1, paving bottom dies 24 on all the distribution beams 23, starting to pour the bridge deck plate 3 after the bottom dies 24 are paved, and arranging a protection area 25 for the L-shaped bearing pipes to prevent cement paste from entering the L-shaped bearing pipes during pouring;
S5, after pouring of the bridge deck 3 is completed, the bottom die 24 and the distribution beam 23 are sequentially removed, then the tripod 9 and the L-shaped bearing pipes are unfixed, the tripod 9 is completely separated from the L-shaped bearing pipes by using the lifting ropes 22, the tripod 9 is pulled and retrieved from the outer side of the bridge deck, then all the connecting ribs 15 are cut, all the L-shaped bearing pipes are taken out, and finally all the lifting ropes 22 are retrieved.
Before pouring the bridge deck, utilize L type bearing tube detachably to install fixed suspension support to set up the protection area to L type bearing tube, preset lifting rope for the tripod in the installation prevents that the tripod in the installation from accidentally dropping, the lifting rope can select nylon rope, wait that bridge deck pours the back and cuts the splice bar, unscrew limit bolt and remove the fixed to the tripod, start lifting rope traction tripod and lift up again and retrieve the bottom of leaving the bridge deck, whole construction process is convenient, nimble, high-efficient, the country such as malaysia has been purposefully solved and has been disallowed to use the basket to carry out the legal requirement of aerial work, can adapt to the bridge construction of complicacy, dangerous topography, the security of construction operation has been showing and has been improved.
In another technical scheme, as shown in fig. 1,2 and 3, in step S1, when the L-shaped bearing tube is sleeved at the upper end of the tripod 9 and is fixed relatively, the first support rod 10 of the tripod 9 vertically passes through the through hole 6 of the L-shaped bearing tube upwards until the bearing block 13 is positioned above the L-shaped bearing tube, then the position of the tripod 9 is adjusted so that the bearing block 13 is fully contacted with the top surface of the L-shaped bearing tube, then the limit bolt 8 is screwed, and when the tripod 9 and the L-shaped bearing tube are released from fixation, the limit bolt 8 is unscrewed first, and then the position of the tripod 9 is adjusted so that the first support rod 10 with the bearing block 13 is moved downwards out of the through hole 6 of the L-shaped bearing tube.
Before the limit bolt is screwed up, the bearing block and the first support rod can smoothly pass through the through hole, and the bearing block is transversely arranged on the outer surface of the first support rod to be matched with the limit bolt, so that the bearing block can completely transmit the stress of the tripod to the L-shaped bearing pipe, the horizontal displacement of the tripod can be adjusted according to the screwing-up degree of the limit bolt, and the bolt structure is convenient to mount and dismount.
In another technical scheme, as shown in fig. 1, 2,3 and 5, a pair of opposite perforations 19 are formed on the side wall of the tripod 9 above the bearing block 13, a safety pin 20 is penetrated in the perforations 19, and when the tripod 9 is released from the L-shaped bearing pipe, the safety pin 20 is pulled out first and then the limit bolt 8 is unscrewed.
The safety pin is additionally arranged at the top of the tripod and is used for double safety of stress when the tripod is hung and dismantled in the installation stage, so that the hidden danger that the whole tripod falls down due to the fact that a limit bolt is not locked and a bearing block is not completely contacted with the top of an L-shaped bearing tube is avoided, and if the tripod moves downwards in advance, the two ends of the safety pin just touch the top end surface of the L-shaped bearing tube to bear the gravity of the tripod.
In another technical scheme, as shown in fig. 1 and 3, when the protection area 25 is set for the L-shaped bearing tube in step S4, a PVC pipe is sleeved on the L-shaped bearing tube, and then geotextile is filled in the PVC pipe.
The PVC pipe is arranged to isolate and seal the periphery of the L-shaped bearing pipe when the bridge deck slab is poured, so that cement paste is prevented from contacting the L-shaped bearing pipe and affecting subsequent disassembly work, and the L-shaped bearing pipe can be directly taken out from the PVC pipe upwards when the L-shaped bearing pipe is disassembled due to the PVC pipe, so that the construction is convenient and quick.
In another technical scheme, as shown in fig. 1 and 2, before the distribution beams 23 and the bottom die 24 are arranged, two ends of each distribution beam 23 are welded with a lifting lug 26 respectively, the outer side of the bottom die 24 is provided with holes, each lifting lug 26 and the holes on the bottom die 24 are respectively connected with a lifting rope 22, the other ends of the lifting ropes 22 are fixedly connected with a gate-type embedded rib 14 at the corresponding position, when the bottom die 24 and the distribution beams 23 are dismounted, the bottom die 24 and the distribution beams 23 are sequentially pulled outwards along the width direction of the U-shaped beam 1 until the bottom of the bridge deck 3 is completely separated, and then pulled to the bridge deck 3 to recycle the bottom die 24 and the distribution beams 23.
The bottom die and the distribution beam are removed by the aid of the lifting ropes, the operation is convenient, the construction cost is low, and the method is particularly suitable for bridge construction projects in countries such as malaysia, which have laws for prohibiting the use of cranes and hanging baskets.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
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| CA2306295A1 (en) * | 2000-04-20 | 2001-10-20 | Bot Construction Limited | Bridge structure with concrete deck having pre-cast slab |
| CN205576746U (en) * | 2016-04-14 | 2016-09-14 | 中交第二航务工程局有限公司 | A new support for U type flange board is cast -in -place |
| CN205604719U (en) * | 2016-05-11 | 2016-09-28 | 北京城建建设工程有限公司 | Superelevation, jumbo size board structural template braced system that encorbelments |
| KR101941942B1 (en) * | 2018-07-03 | 2019-04-11 | 김문홍 | Integrated form structure for constructing cantilever slab and protective wall of bridge, and construction method using the same |
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