Assembly type protection platform for construction of overpass expressway bridge deck system

Abstract

An assembly type protection platform for construction of an overpass expressway bridge deck system is of an assembly type structure and comprises anchoring parts and a cantilever protection platform, the anchoring parts comprise anchoring main beams and anchoring bolts, and the cantilever protection platform is composed of cantilever bearing main beams, protection handrails, protection cross beams, protection plates, skirting board fixing rod pieces and vertical connecting rod pieces; the anchoring main beam is anchored on a bridge deck in advance, the cantilever protection platform is integrally hoisted to the cantilever end of the anchoring main beam after being machined, and then the cantilever protection platform and the anchoring main beam are connected and installed in place through bolts. The protection platform is simple in structure, low in cost, easy to machine and light in structural dead weight, the overhanging protection platform only needs to be hoisted to the end of the anchoring main beam to be connected through high-strength bolts in the installation procedure, only one procedure is needed for installation and detachment, the procedure is extremely simple, installation can be in place at a time, the construction efficiency is greatly improved, and the construction cost is reduced. The protective shed erecting measure and the traffic control operation measure are reduced, the construction measure cost is saved, and the construction cost is reduced.

Description

Technical field:

[0001] The invention discloses an assembled protective platform for the construction of a bridge deck system over a highway, belonging to the technical field of bridge construction, and in particular relates to safety protective measures for the construction of a bridge deck system over an existing road. Background technology:

[0002] With the rapid development of the national expressway network, new expressways often cross existing expressways multiple times. During the construction of the bridge deck system of the expressway under construction, it is very easy to have accidents caused by falling materials and other objects, which has a certain impact on the safe operation of the existing expressway. For conventional methods, safety protection measures such as setting up protective sheds are taken on existing expressways. Traffic control construction is required during the installation and removal process. The installation and removal of protective sheds require a long construction period, and the operation and maintenance costs of safety protection and traffic control measures are high. The installation and removal of the protective shed itself is a dangerous project. During the installation and removal of the protective shed, there is cross-operation with vehicles passing through the existing expressway, and the safety risk is extremely high. Summary of the invention:

[0003] The problem that the utility model aims to solve is to provide an assembled protection platform for the construction of a bridge deck system across a highway in response to the above needs and problems.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides an assembled protection platform for construction of a bridge deck system over a highway. The protection platform is an assembled structure, which consists of two parts: an anchor piece and a cantilevered protection platform. The anchor piece includes an anchoring main beam and an anchoring bolt. The anchoring bolt is pre-buried in the bridge concrete. The anchoring main beam is connected to the bridge deck by the anchoring bolt. One end of the anchoring main beam cantilevers out of the bridge deck. The anchoring main beam is arranged along the width direction of the bridge deck and several anchoring main beams are arranged in parallel along the length direction of the bridge deck. The cantilevered protection platform is detachably connected to the cantilevered ends of several anchoring main beams. The cantilevered protection platform includes a cantilevered load-bearing main beam, a protective railing, a protective crossbeam, a protective plate, a skirting board fixing rod, and a vertical connecting rod. The cantilevered load-bearing main beam, the protective railing, the protective crossbeam, the vertical connecting rod and the anchoring main beam are connected to each other. The beams are arranged correspondingly, and several of them are arranged in parallel along the length direction of the bridge deck; the cantilever load-bearing main beam is horizontally arranged at the cantilever end of the corresponding anchor main beam, and is detachably connected to the cantilever end of the anchor main beam; the protective crossbeam is arranged in parallel under the corresponding cantilever load-bearing main beam, and is respectively fixedly connected to the protective railing and the vertical connecting rod as a whole; the two ends of the vertical connecting rod are respectively connected to the cantilever load-bearing main beam and the protective crossbeam; the protective railing is arranged vertically, and is respectively connected to the end of the cantilever load-bearing main beam and the end of the protective crossbeam; the skirting board fixing rod is arranged under the bottom of the bridge and arranged along the length direction of the bridge, and the skirting board fixing rod is fixed to the end of several protective crossbeams; the protective plate is vertically installed and fixed on several protective railings, and horizontally laid on several protective crossbeams and skirting board fixing rods.

[0006] The number of the anchored main beams, cantilevered load-bearing main beams, guardrails, protective cross beams, and vertical connecting rods is matched.

[0007] The anchoring main beam is made of I32 I-steel, the length of the anchoring main beam is ≧1.5 times the length of the cantilevered protection platform, the length of the anchoring main beam is 2m, the anchoring main beam passes through the bridge deck drainage system at the bottom of the anti-collision guardrail of the bridge deck, and the drainage holes are reserved horizontally to cantilever out of the bridge deck by 0.2m, and the length anchored on the bridge deck is 1.8m; the anchoring bolts are U-bolts made of Q235 carbon steel, and the U-bolt openings are embedded downward in the prefabricated beams of the bridge, and 4 are arranged along the length direction of each anchoring main beam. Each anchoring main beam is connected to the bridge deck by crossing 4 anchor bolts, and the distances between the ends of the 4 anchor bolts away from the cantilevered end of the anchoring main beam are 0.2m, 0.4m, 0.9m, and 1.5m respectively.

[0008] The cantilever load-bearing main beam is made of I30 light hot-rolled I-beam, with a length of 1m. Through holes are correspondingly arranged at the connection between the cantilevered end of the cantilever load-bearing main beam and the anchoring main beam. The cantilevered end of the cantilever load-bearing main beam and the anchoring main beam are connected by M8.8 grade high-strength connecting bolts.

[0009] The protective crossbeam is made of [10# channel steel and is welded together with the protective railing and vertical connecting rods.

[0010] The vertical connecting rod is made of [12# channel steel, which is vertically arranged with the cantilevered load-bearing main beam and the protective cross beam and is welded into one.

[0011] The guardrail is made of [10# channel steel, which is welded and fixed to the cantilevered load-bearing main beam and the guard beam.

[0012] The skirting board fixing rod is made of ∠75# angle steel, and the height is set at 30cm. The skirting board fixing rod is welded to the end of each protective beam.

[0013] The protective plate is a two-layer composite system structure, using a composite component of a steel mesh + patterned steel plate. The first layer is paved with a steel mesh with a diameter of Φ8mm and a grid size of 10cm×10cm, and the second layer is paved with a 3mm thick patterned steel plate. It is fully laid on the guardrail, protective beam, and skirting board fixing rods, and is firmly fixed by welding.

[0014] A lifting lug is fixedly arranged at the top of the cantilever load-bearing main beam. The lifting lug is made of a δ=2cm thick steel plate, and a through hole is arranged on the steel plate. Two lifting lugs are symmetrically arranged on each cantilever load-bearing main beam.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model has the advantages of simple structure, low cost, easy processing and light weight.

[0017] 2. The utility model is an assembled composite component, which is mainly composed of two parts: an anchor and a cantilevered protective platform. It only needs to be hoisted to the end of the anchored main beam and connected with high-strength bolts. Installation and removal only require one process, which is extremely simple and can be installed in place at one time, greatly improving construction efficiency and saving construction time.

[0018] 3. The utility model saves the measures for erecting protective sheds and traffic control operation measures, greatly saves the construction measures fee, and reduces the construction cost.

[0019] 4. The utility model can effectively prevent bridge deck materials from falling, prevent accidents caused by objects hitting the bridge, and effectively control safety risks.

[0020] 5. The anchored main beam and cantilevered protective platform of the utility model can be reused.

[0021] In summary, the utility model reduces safety protection measures such as protective sheds and traffic control operations, saves costs and reduces safety risks, while saving construction time. The utility model is processed into uniform specifications, which is convenient for on-site assembly and construction, effectively controls construction costs, and has obvious economic benefits. Description of the drawings:

[0022] Figure 1 This is a cross-sectional view of the structure of the utility model in a transverse arrangement;

[0023] Figure 2 It is a plan view of the longitudinal arrangement of the structure of the utility model;

[0024] Figure 3 It is a structural cross-sectional view of the utility model;

[0025] Figure 4 This is a layout diagram of the anchored main beam of the utility model structure.

[0026] Reference numerals in the figures:

[0027] 1-anchoring main beam, 2-cantilevered load-bearing main beam, 3-anchoring bolts, 4-connecting bolts, 5-protective beam, 6-protective railing, 7-protective plate, 8-vertical connecting rod, 9-skirting board fixing rod, 10-lifting ear, 11-anti-collision guardrail. Specific implementation method:

[0028] The present invention is further described below in conjunction with specific implementation methods. The specific implementation methods are further descriptions of the principles of the present invention and do not limit the present invention in any way. Technologies identical or similar to the present invention do not exceed the scope of protection of the present invention.

[0029] See also Figure 1-Figure 4 The utility model provides an assembled protection platform for the construction of a bridge deck across a highway. The protection platform is an assembled structure, which consists of two parts: an anchor and a cantilevered protection platform. The anchor is anchored on the bridge deck in advance. After the cantilevered protection platform is processed, it is hoisted as a whole to the cantilevered end of the anchor and then connected to the anchor with high-strength bolts and installed in place.

[0030] The anchoring device includes an anchoring main beam 1 and anchoring bolts 3. The anchoring bolts 3 are pre-buried in the bridge concrete. The anchoring main beam 1 is connected to the bridge deck through the anchoring bolts 3. One end of the anchoring main beam 1 is cantilevered out of the bridge deck. The anchoring main beam 1 is arranged along the width direction of the bridge deck and several anchoring main beams are arranged in parallel along the length direction of the bridge deck. In this embodiment, the anchoring main beam 1 is made of I32 I-steel, the length of the anchoring main beam 1 is greater than or equal to 1.5 times the length of the cantilevered protection platform, the length of the anchoring main beam 1 is 2m, the anchoring main beam 1 passes through the bridge deck drainage system at the bottom of the anti-collision guardrail 11 of the bridge deck, and the drainage holes are reserved horizontally to cantilever out of the bridge deck by 0.2m, and the length of anchoring on the bridge deck is 1.8m; the anchoring bolts 3 are U-bolts made of Q235 carbon steel, and the U-bolt openings are embedded downward in the prefabricated beams of the bridge, and 4 are arranged along the length direction of each anchoring main beam 1, and each anchoring main beam 1 is connected to the bridge deck by crossing 4 anchoring bolts 3, and the spacing between the ends of the 4 anchoring bolts 3 away from the cantilevered end of the anchoring main beam 1 is 0.2m, 0.4m, 0.9m, and 1.5m respectively.

[0031] The cantilevered protection platform is detachably connected to the cantilevered ends of several anchored main beams 1 by connecting bolts 4. The cantilevered protection platform includes a cantilevered load-bearing main beam 2, a guardrail 6, a protective crossbeam 5, a protective plate 7, a skirting board fixing rod 9, and a vertical connecting rod 8. The cantilevered load-bearing main beam 2, the guardrail 6, the protective crossbeam 5, and the vertical connecting rod 8 are arranged corresponding to the anchored main beam 1, and several of them are arranged in parallel along the length direction of the bridge deck. The number of the anchored main beam 1, the cantilevered load-bearing main beam 2, the guardrail 6, the protective crossbeam 5, and the vertical connecting rod 8 matches each other. The cantilevered load-bearing main beam 2 is horizontally arranged at the cantilevered end of the corresponding anchored main beam 1, and is detachably connected to the cantilevered end of the anchored main beam 1. The cantilevered load-bearing main beam 2 is made of I30 light hot-rolled I-beam, with a length of 1m. Through holes are correspondingly arranged at the connection between the cantilevered load-bearing main beam 2 and the cantilevered end of the anchored main beam 1. The cantilevered load-bearing main beam 2 and the cantilevered end of the anchored main beam 1 are connected by M8.8 grade high-strength connecting bolts 4. The protective crossbeam 5 is arranged in parallel below the corresponding cantilevered load-bearing main beam 2. The protective crossbeam 5 is made of [10# channel steel, and is welded to the corresponding protective railing 6 and vertical connecting rod 8 as a whole, and a fillet weld is adopted. The vertical connecting rod 8 is made of [12# channel steel, and its two ends are respectively arranged vertically with the cantilevered load-bearing main beam 2 and the protective crossbeam 5, and are welded as a whole, and a fillet weld is adopted. The guardrail 6 is vertically arranged with [10# channel steel, and is respectively welded and fixed to the end of the cantilevered load-bearing main beam 2 and the end of the protective beam 5 as a whole, and a full-welding method of fillet welds is adopted. The skirting board fixing rod 9 is arranged below the bottom of the bridge and along the length direction of the bridge. The skirting board fixing rod 9 is made of ∠75# angle steel, and the height is set at 30cm. The skirting board fixing rod 9 is welded to the end of each protective beam 5, and a full-welding method of fillet welds is adopted. The protective plate 7 is vertically installed and fixed on several guardrails 6, and horizontally laid on several protective beams 5 and the skirting board fixing rod 9. The protective plate 7 is a two-layer combined system structure, and adopts a steel mesh + patterned steel plate composite component. The first layer is paved with a steel mesh with a diameter of Φ8mm and a mesh size of 10cm×10cm. The second layer is paved with a 3mm thick patterned steel plate, which is fully laid on the guardrail 6, the protective beam 5, and the skirting board fixing rod 9, and is firmly fixed by welding. A lifting lug 10 is fixedly provided at the top of the cantilever load-bearing main beam 2. The lifting lug 10 is made of a δ=2 cm thick steel plate with a through hole. Two lifting lugs 10 are symmetrically provided on each cantilever load-bearing main beam 2. The lifting lug 10 is fully welded and fixed to the cantilever load-bearing main beam 2.

[0032] The construction of the protective platform mainly includes the following steps:

[0033] 1) Prepare the cantilever protection platform in advance. The cantilever protection platform mainly includes the cantilever load-bearing main beam 2, the protection beam 5, the protection railing 6, the protection plate 7, the vertical connecting rod 8, the skirting board fixing rod 9, and the lifting lug 10;

[0034] 2) Install the anchoring main beam 1, the anchoring main beam 1 crosses the anchor bolts 3 anchored in the prefabricated beams of the newly built highway bridge, and the anchoring main beam 1 is cantilevered 20 cm out of the bridge deck through the transverse reserved holes corresponding to the bridge deck drainage system;

[0035] 3) Use a crane to lift the prepared cantilever protection platform to the cantilever end of the anchor main beam 1, and connect the cantilever load-bearing main beam 2 of the cantilever protection platform with the corresponding anchor main beam 1 using high-strength connecting bolts 4;

[0036] 4) After the cantilever protection platform is installed, cast the anti-collision guardrail 11 and other structures of the bridge deck system;

[0037] 5) After the bridge deck system is poured, a crane is used to load the cantilever protection platform in advance, the high-strength connecting bolts 4 are removed, the cantilever protection platform is hoisted and removed, and then the anchor main beam 1 is pulled out.

Claims

1. An assembled protection platform for construction of a bridge deck over a highway, characterized by: The protective platform is an assembled structure, which consists of two parts: an anchoring piece and a cantilevered protective platform; the anchoring piece comprises an anchoring main beam (1) and an anchoring bolt (3); the anchoring bolt (3) is pre-buried in the bridge concrete; the anchoring main beam (1) is connected to the bridge deck via the anchoring bolt (3); one end of the anchoring main beam (1) is cantilevered out of the bridge deck; the anchoring main beam (1) is arranged along the width direction of the bridge deck; and several anchoring main beams (1) are arranged in parallel along the length direction of the bridge deck; the cantilevered protective platform is detachably connected to the cantilevered ends of the several anchoring main beams (1); the cantilevered protective platform comprises a cantilevered load-bearing main beam (2), a protective railing (6), a protective cross beam (5), a protective plate (7), a skirting board fixing rod (9), and a vertical connecting rod (8); the cantilevered load-bearing main beam (2), the protective railing (6), the protective cross beam (5), and the vertical connecting rod (8) are arranged corresponding to the anchoring main beam (1) and along the length direction of the bridge deck. Several of them are arranged in parallel with each other; the cantilevered load-bearing main beam (2) is arranged horizontally at the cantilevered end of the corresponding anchoring main beam (1), and is detachably connected to the cantilevered end of the anchoring main beam (1); the protective crossbeam (5) is arranged in parallel below the corresponding cantilevered load-bearing main beam (2), and is respectively fixedly connected to the protective railing (6) and the vertical connecting rod (8) as a whole; the two ends of the vertical connecting rod (8) are respectively connected to the cantilevered load-bearing main beam (2) and the protective crossbeam (5); the protective railing (6) is arranged vertically, and is respectively connected to the end of the cantilevered load-bearing main beam (2) and the end of the protective crossbeam (5); the skirting board fixing rod (9) is arranged below the bottom of the bridge, and is arranged along the length direction of the bridge, and the skirting board fixing rod (9) is fixed to the ends of several protective crossbeams (5); the protective plate (7) is vertically installed and fixed on several protective railings (6), and horizontally laid on several protective crossbeams (5) and the skirting board fixing rod (9).

2. The assembled protection platform for construction of a bridge deck over a highway according to claim 1 is characterized by: The number of the anchoring main beam (1), the cantilevered load-bearing main beam (2), the guardrail (6), the guard crossbeam (5), and the vertical connecting rods (8) matches each other.

3. The assembled protection platform for construction of a bridge deck over a highway according to claim 1 is characterized by: The anchoring main beam (1) is made of I32 I-beam, the length of the anchoring main beam (1) is ≧1.5 times the length of the cantilevered protection platform, the length of the anchoring main beam (1) is 2m, the anchoring main beam (1) passes through the bridge deck drainage system at the bottom of the anti-collision guardrail (11) of the bridge deck, and the bridge deck is cantilevered 0.2m from the bridge deck with a drainage hole reserved horizontally, and the length of the anchoring on the bridge deck is 1.8m; the anchoring bolts (3) are U-shaped bolts made of Q235 carbon steel, the U-shaped bolt openings are embedded downward in the prefabricated bridge beams, and 4 are arranged along the length direction of each anchoring main beam (1), and each anchoring main beam (1) is connected to the bridge deck by crossing 4 anchoring bolts (3), and the distances between the ends of the 4 anchoring bolts (3) away from the cantilevered end of the anchoring main beam (1) are 0.2m, 0.4m, 0.9m, and 1.5m respectively.

4. The assembled protection platform for construction of a bridge deck over a highway according to claim 1 is characterized by: The cantilever load-bearing main beam (2) is made of I30 light hot-rolled I-beam and has a length of 1m. Through holes are correspondingly arranged at the connection between the cantilevered ends of the cantilever load-bearing main beam (2) and the anchoring main beam (1). The cantilevered ends of the cantilever load-bearing main beam (2) and the anchoring main beam (1) are connected by M8.8 grade high-strength connecting bolts (4).

5. The assembled protection platform for construction of a bridge deck over a highway according to claim 1 is characterized by: The protective crossbeam (5) is made of [10# channel steel and is welded together with the protective railing (6) and the vertical connecting rod (8).

6. The assembled protection platform for construction of a bridge deck over a highway according to claim 1 is characterized by: The vertical connecting rod (8) is made of [12# channel steel, and is vertically arranged with the cantilevered load-bearing main beam (2) and the protective cross beam (5), and is welded into one.

7. The assembled protection platform for construction of a bridge deck over a highway according to claim 1 is characterized by: The guardrail (6) is made of [10# channel steel and is welded and fixed to the cantilevered load-bearing main beam (2) and the guard cross beam (5) as a whole.

8. The assembled protection platform for construction of a bridge deck over a highway according to claim 1 is characterized by: The skirting board fixing rod (9) is made of ∠75# angle steel, and the height is set at 30cm. The skirting board fixing rod (9) is welded to the end of each protective beam (5).

9. The assembled protection platform for construction of a bridge deck over a highway according to claim 1 is characterized by: The protective plate (7) is a two-layer composite system structure, using a steel mesh + patterned steel plate composite component. The first layer is paved with a steel mesh with a diameter of Φ8mm and a mesh size of 10cm×10cm, and the second layer is paved with a 3mm thick patterned steel plate. It is fully paved on the protective railing (6), the protective beam (5), and the skirting board fixing rod (9), and is firmly fixed by welding.

10. The assembled protection platform for construction of a bridge deck over a highway according to claim 1 is characterized by: The top of the cantilevered load-bearing main beam (2) is fixedly provided with a lifting lug (10), which is made of a δ=2 cm thick steel plate with a through hole, and each cantilevered load-bearing main beam (2) is symmetrically provided with two lifting lugs (10).

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