Permanent and temporary combined steel-concrete composite beam cast-in-place bridge deck flange plate truss formwork support system

Abstract

The utility model relates to a permanent and temporary combined steel-concrete composite beam cast-in-place bridge floor flange plate truss formwork support system which comprises a plurality of steel truss assemblies arranged at the top of a steel box beam at equal intervals in the longitudinal bridge direction, each steel truss assembly comprises two steel trusses, and the two steel trusses are symmetrically arranged on jacking steel plates on the two sides of the top of a web of the steel box beam. Steel formworks are welded to the bottoms of the steel trusses on the same side, and the inner sides of the steel formworks are welded to the outer sides of the jacking steel plates. The steel truss comprises a first rod piece, a second rod piece, a third rod piece, a fourth rod piece, a fifth rod piece, a sixth rod piece, a hanging rod, a cushion block and a plurality of gusset plates. The device is high in practicability, simple in structure, convenient to install, high in working efficiency and low in cost; the load of the flange part of the cast-in-place bridge deck slab is transmitted to the steel beam body, so that the problem that a scaffold full framing is inconvenient to erect on an operation site is solved, and the problems that the machining workload of the framing is large, and the mounting and dismounting operation difficulty is large are solved; and the permanent-temporary combined structure is adopted, and later-stage dismantling is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a cast-in-place deck flange plate truss formwork support system for a steel-concrete composite beam with permanent and temporary combination. Background Art

[0002] With the accelerating urbanization process and the rapid development of transportation infrastructure, the steel-concrete composite beam structure bridge, as a superior structural form to meet the requirements of large-span crossing projects, has been widely used in bridge engineering. However, in the existing construction practice, the cast-in-place construction of the steel-concrete composite beam bridge deck faces many challenges and difficulties.

[0003] In the existing construction of the flange cantilever support of the steel-concrete composite beam bridge deck, common forms include traditional full hall scaffolds, beam-column scaffolds, triangular cantilever scaffolds formed by welding steel sections, and cantilever beam hanging structures, etc. However, these support structures all have certain limitations and defects, such as occupying the space under the bridge, large welding volume, difficult scaffold removal, complex construction operations, low construction efficiency, and requiring a lot of manpower, material resources and construction period, etc., which restrict the development of modern bridge construction. Summary of the Utility Model

[0004] The utility model aims to solve the deficiencies of the existing technology and provide a cast-in-place deck flange plate truss formwork support system for a steel-concrete composite beam with permanent and temporary combination, which can carry out the cast-in-place construction of the bridge deck flange more efficiently, safely and economically.

[0005] In order to achieve the above object, the utility model adopts the following technical solutions:

[0006] A cast-in-place deck flange plate truss formwork support system for a steel-concrete composite beam with permanent and temporary combination, comprising a plurality of steel truss components arranged at equal intervals along the longitudinal bridge direction on the top of the steel box girder. Each steel truss component includes two steel trusses, and the two steel trusses are symmetrically arranged on the top support steel plates on both sides of the web of the steel box girder. A steel formwork is welded at the bottom of a plurality of steel trusses on the same side, and the inner side of the steel formwork is welded to the outer side of the top support steel plate;

[0007] The steel truss includes a first rod, a second rod, a third rod, a fourth rod, a fifth rod, a sixth rod, a suspension rod and a cushion block;

[0008] The first rod is horizontally arranged in the inner area of the steel bar skeleton of the bridge deck. The outer end of the first rod is welded to the steel formwork. The second rod is welded to the left side position at the bottom of the first rod. One end of the third rod is welded to the middle position at the bottom of the first rod, and the other end is obliquely welded to the top bearing steel plate. The fourth rod and the fifth rod are welded to the right side position at the bottom of the first rod. The other end of the fourth rod is vertically welded to the top bearing steel plate, and the other end of the fifth rod is vertically welded to the top bearing steel plate. The other end of the second rod is welded to the fourth rod. A number of suspender rods are welded between the second rod and the steel formwork. The sixth rod is welded between the middle position at the bottom of the first rod and the position corresponding to the suspender rod of the second rod. The cushion block is welded to one end of the top of the first rod close to the center line of the steel box girder, and the top of the cushion block is welded to the transverse steel bars of the bridge deck.

[0009] A first gusset plate is provided at the welding joint of the first rod and the second rod.

[0010] A second gusset plate is provided at the welding joints of the first rod with the third rod and the sixth rod.

[0011] A third gusset plate is provided at the welding joints of the first rod with the fourth rod and the fifth rod.

[0012] A fourth gusset plate is provided at the welding joints of the second rod with the sixth rod and the suspender rod.

[0013] A fifth gusset plate is provided at the welding joint of the second rod and the fourth rod.

[0014] The number of suspender rods provided for each steel truss is 1 - 2.

[0015] The suspender rods are arranged in the gaps between the longitudinal steel bars at the bottom layer of the bridge deck.

[0016] A number of steel trusses on the same side are arranged in the middle of the shear stud gaps on the top bearing steel plate.

[0017] The beneficial effects of the present utility model are as follows: The present utility model has strong practicability, simple structure, convenient installation, high working efficiency and low cost; by transferring the load of the cast-in-place bridge deck flange part to the steel beam body, it solves the problem that it is inconvenient to erect a full hall scaffold at the operation site, and solves the problems of large processing workload of the scaffold, difficult installation and removal operations; it belongs to a permanent and temporary combined structure and does not need to be demolished later. Description of the Drawings

[0018] Figure 1 It is a schematic installation cross-section view of the present utility model;

[0019] Figure 2 It is a schematic installation plan view of the present utility model;

[0020] Figure 3 It is a schematic enlarged view of the partial structure of the present utility model;

[0021] In the figure: 1 - steel truss; 2 - steel formwork; 3 - steel box girder; 4 - bridge deck;

[0022] 101 - first member; 102 - second member; 103 - third member; 104 - fourth member; 105 - fifth member; 106 - sixth member; 107 - suspender; 108 - spacer; 109 - first gusset plate; 110 - second gusset plate; 111 - third gusset plate; 112 - fourth gusset plate; 113 - fifth gusset plate;

[0023] 301 - top bearing steel plate; 302 - shear stud; 303 - steel box girder web;

[0024] 401 - transverse reinforcement; 402 - longitudinal reinforcement;

[0025] The following will describe in detail with reference to the accompanying drawings in conjunction with the embodiments of the present invention. Specific embodiments

[0026] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. The present invention will be described more specifically by way of example in the following paragraphs. The advantages and features of the present invention will be clearer according to the following description. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the objectives of the embodiments of the present invention.

[0027] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] As Figures 1 to 3As shown in the figure, the cast-in-place deck slab truss formwork support system of the steel-concrete composite beam with permanent and temporary combination is a steel structure system, including several steel truss components arranged at equal intervals along the longitudinal bridge direction on the top of the steel box girder 3. Each steel truss component includes two steel trusses 1, and the two steel trusses are symmetrically arranged on the top bearing steel plates 301 on both sides of the top of the steel box girder web 303. The bottoms of several steel trusses 1 on the same side are welded with steel formwork 2, and the inner side of the steel formwork 2 is welded to the outer side of the top bearing steel plate 301.

[0031] A plurality of steel truss components are arranged at a certain interval along the longitudinal bridge direction. The two steel trusses 1 of the steel truss component are symmetrically arranged about the beam center line. The interval distance along the longitudinal bridge direction needs to be determined through force analysis. Several steel trusses 1 on the same side are arranged in the middle of the shear studs 302 gaps on the top bearing steel plate 301.

[0032] The steel truss 1 includes a first member 101, a second member 102, a third member 103, a fourth member 104, a fifth member 105, a sixth member 106, a suspender 107, a spacer 108, a first gusset plate 109, a second gusset plate 110, a third gusset plate 111, a fourth gusset plate 112, and a fifth gusset plate 113.

[0033] All members are made of angle steel or channel steel and are welded and connected through multiple gusset plates to form a structure with an overall triangular shape. The section steel models of all members need to be determined through force calculation.

[0034] The first member 101 is horizontally arranged in the internal area of the steel bar cage of the bridge deck 4. The outer end of the first member 101 is welded to the steel formwork 2. The second member 102 is welded to the left side position at the bottom of the first member 101. One end of the third member 103 is welded to the middle position at the bottom of the first member 101, and the other end is obliquely welded to the top bearing steel plate 301. The fourth member 104 and the fifth member 105 are welded to the right side position at the bottom of the first member 101. The other end of the fourth member 104 is vertically welded to the top bearing steel plate 301. The other end of the fifth member 105 is vertically welded to the top bearing steel plate 301. The other end of the second member 102 is welded to the fourth member 104. Several suspenders 107 are welded between the second member 102 and the steel formwork 2. The sixth member 106 is welded between the middle position at the bottom of the first member 101 and the position corresponding to the suspender 107 of the second member 102. A first gusset plate 109 is provided at the welding joint of the first member 101 and the second member 102. A second gusset plate 110 is provided at the welding joints of the first member 101 with the third member 103 and the sixth member 106. A third gusset plate 111 is provided at the welding joints of the first member 101 with the fourth member 104 and the fifth member 105. A fourth gusset plate 112 is provided at the welding joints of the second member 102 with the sixth member 106 and the suspender 107. A fifth gusset plate 113 is provided at the welding joint of the second member 102 and the fourth member 104.

[0035] The spacer block 108 is welded to one end of the top of the first rod member 101 near the center line of the steel box girder 3. The top of the spacer block 108 is welded to the transverse reinforcement 401 of the bridge deck 4, and the tension between the steel trusses 1 on both sides of the bridge is realized through the transverse reinforcement 401.

[0036] The number of suspension rods 107 provided for each steel truss 1 is 1 - 2. The suspension rods 107 are arranged in the gaps between the longitudinal reinforcements 402 at the bottom layer of the bridge deck 4 to avoid conflicts with the bridge deck reinforcement.

[0037] The steel formwork 2 is made of steel plates, and its thickness needs to be determined through force calculation. The shape of the steel formwork 2 needs to fit the lower side and the end of the flange of the bridge deck 4.

[0038] The utility model has the characteristics of strong practicability, simple structure, convenient installation, high working efficiency, low cost, etc. By transferring the load of the cast - in - place bridge deck flange part to the steel beam body, it solves the problem that it is inconvenient to set up full - hall scaffolds at the operation site, solves the problem of large workload of scaffold processing, and solves the problem of great difficulty in the installation and removal operations of the scaffolds.

[0039] The utility model combines permanent and temporary uses and does not need to be demolished later. After the bridge deck concrete is poured, the steel truss 1 and the bridge deck 4 become an integral body, which can improve the bearing capacity of the bridge deck flange and reduce the amount of reinforcement of the bridge deck 4.

[0040] The above has made an exemplary description of the utility model in conjunction with the drawings. Obviously, the specific implementation of the utility model is not limited by the above - mentioned methods. As long as various improvements are made by adopting the method concept and technical solution of the utility model, or directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. The permanent and temporary combined steel-concrete composite beam cast-in-place bridge deck flange truss formwork support system is characterized by: It comprises a plurality of steel truss assemblies arranged equidistantly on the top of a steel box girder (3) along the longitudinal bridge direction, each steel truss assembly comprises two steel trusses (1), and the two steel trusses are symmetrically arranged on the top supporting steel plates (301) on both sides of the top of the steel box girder web (303), and a steel template (2) is welded to the bottom of the plurality of steel trusses (1) on the same side, and the inner side of the steel template (2) is welded to the outer side of the top supporting steel plate (301); The steel truss (1) comprises a first rod (101), a second rod (102), a third rod (103), a fourth rod (104), a fifth rod (105), a sixth rod (106), a suspension rod (107) and a pad (108); The first rod (101) is horizontally arranged in the inner area of ​​the steel skeleton of the bridge deck (4); the outer end of the first rod (101) is welded to the steel formwork (2); the second rod (102) is welded to the left side of the bottom of the first rod (101); one end of the third rod (103) is welded to the middle of the bottom of the first rod (101) and the other end is welded obliquely to the top supporting steel plate (301); the fourth rod (104) and the fifth rod (105) are welded to the right side of the bottom of the first rod (101); the other end of the fourth rod (104) is welded vertically to the top supporting steel plate (301); the fifth rod (105) is welded to the right side of the bottom of the first rod (101); the other end of the fourth rod (104) is welded vertically to the top supporting steel plate (301); The other end of the second rod (105) is vertically welded to the top supporting steel plate (301), the other end of the second rod (102) is welded to the fourth rod (104), a plurality of suspension rods (107) are welded between the second rod (102) and the steel formwork (2), the sixth rod (106) is welded between the middle position of the bottom of the first rod (101) and the position of the suspension rod (107) corresponding to the second rod (102), the pad (108) is welded to the top of the first rod (101) at one end close to the center line of the steel box girder (3), and the top of the pad (108) is welded to the transverse reinforcement (401) of the bridge deck (4).

2. The permanent and temporary combined steel-concrete composite beam cast-in-place bridge deck flange truss formwork support system according to claim 1 is characterized in that: A first node plate (109) is provided at the welding point between the first rod member (101) and the second rod member (102).

3. The permanent and temporary combined steel-concrete composite beam cast-in-place bridge deck flange truss formwork support system according to claim 2 is characterized in that: A second node plate (110) is provided at the welding point between the first rod (101) and the third rod (103) and the sixth rod (106).

4. The permanent and temporary combined steel-concrete composite beam cast-in-place bridge deck flange truss formwork support system according to claim 3 is characterized in that: A third node plate (111) is provided at the welding point between the first rod (101) and the fourth rod (104) and the fifth rod (105).

5. The permanent and temporary combined steel-concrete composite beam cast-in-place bridge deck flange truss formwork support system according to claim 4 is characterized in that: A fourth node plate (112) is provided at the welding point between the second rod (102), the sixth rod (106) and the suspension rod (107).

6. The permanent and temporary combined steel-concrete composite beam cast-in-place bridge deck flange truss formwork support system according to claim 5 is characterized in that: A fifth node plate (113) is provided at the welding point between the second rod member (102) and the fourth rod member (104).

7. The permanent and temporary combined steel-concrete composite beam cast-in-place bridge deck flange truss formwork support system according to claim 6 is characterized in that: The number of suspension rods (107) provided on each steel truss (1) is 1-2.

8. The permanent and temporary combined steel-concrete composite beam cast-in-place bridge deck flange truss formwork support system according to claim 7 is characterized in that: The suspension rod (107) is arranged in the gap between the longitudinal steel bars (402) of the bottom layer of the bridge deck (4).

9. The permanent and temporary combined steel-concrete composite beam cast-in-place bridge deck flange truss formwork support system according to claim 8 is characterized in that: A plurality of steel trusses (1) on the same side are arranged in the middle of the gaps between the shear studs (302) on the top supporting steel plate (301).

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