Low-clearance lower pier top steel-concrete combined section encased steel plate accurate mounting structure

Abstract

The utility model discloses a low-clearance lower pier top steel-concrete combined section encased steel plate accurate installation structure which comprises a boss arranged on the pier top of a pier, the cross section area of the boss is smaller than that of the pier, a steel reinforcement framework is reserved on the boss of the pier, and the steel reinforcement framework is arranged on the boss of the pier. The outer wrapping plate is arranged on the boss in a sleeving mode and located outside the steel reinforcement framework. The connecting structure has the effects that the connecting strength of the outer wrapping plate and the bridge pier is improved, and then the supporting strength of the support is improved.

Description

Technical Field

[0001] The invention relates to the field of engineering construction, and in particular to a precise installation structure of an outer steel plate of a steel-concrete combined section at a low-headroom lower pier top. Background Art

[0002] When building a viaduct under an existing bridge, it is difficult to directly lift the steel girder of the viaduct onto the piers due to the obstruction of the existing bridge. In order to smoothly place the steel girder on the piers, workers build a bracket outside the piers where the steel beam can be directly lifted. After the steel beam is lifted onto the bracket, an electric hoist is installed on the bracket. The electric hoist is connected to the steel girder through a steel wire rope. The electric hoist tightens the steel wire rope to drag the steel girder to make it slide on the bracket until the steel girder slides to the pier and is placed, thereby achieving the purpose of installing the steel girder under the existing bridge.

[0003] With respect to the above-mentioned related technologies, when using a bracket, in order to connect the pier and the bracket and provide the bracket with stable tensile strength, an outer plate will be set on the pier of the concrete structure to facilitate workers to use a connecting frame to connect the bracket and the pier. However, if the outer plate is directly put on the pier, the connection strength between the outer plate and the pier body is insufficient, and it is difficult to provide stable support for the bracket. Summary of the invention

[0004] In order to improve the connection strength between the outer cladding plate and the bridge pier, and further improve the support strength of the bracket, the present application provides a precise installation structure for the outer cladding steel plate of the steel-concrete joint section at the top of the pier with low clearance.

[0005] The present application provides a precise installation structure of the outer steel plate of the low headroom lower pier top steel-concrete joint section, which adopts the following technical solution:

[0006] A precise installation structure for an outer steel plate of a steel-concrete joint section at the top of a low-headroom lower pier, the installation structure is used in conjunction with a pier and an outer steel plate, the installation structure comprises a boss arranged on the top of the pier, the cross-sectional area of ​​the boss is smaller than the cross-sectional area of ​​the pier, the pier is provided with a steel skeleton reserved on the boss, the outer steel plate is sleeved on the boss and is located outside the steel skeleton.

[0007] By adopting the above technical solution, the outer covering plate is installed on the unfinished steel frame of the pier. When pouring concrete into the outer covering plate, the outer covering plate is directly cast together with the pier as a template, thereby improving the connection between the outer covering plate and the pier, thereby providing stronger support for the bracket.

[0008] Preferably, the pier is provided with a mounting groove at the pier top and along the circumference of the boss, and the outer covering plate is inserted into the pier along the vertical direction through the mounting groove.

[0009] By adopting the above technical solution, after the outer covering plate is inserted into the installation groove, the shape of the outer covering plate after connection is fixed by the fixing groove, thereby reducing the bottom deformation of the outer covering plate and thus reducing the occurrence of gaps that cause concrete leakage.

[0010] Preferably, the outer covering plate comprises a pair of splicing monomers, and the outer covering plate is provided with a splicing assembly for splicing the two splicing monomers installed on the pier.

[0011] Because a steel frame is reserved on the top of the pier and the construction site is located under the existing bridge, there is a low-clearance construction environment, which makes it difficult to directly install the outer cover plate. By adopting the above technical solution, the outer cover plate is divided into two monomers, and the two spliced ​​monomers are moved from the side to the top of the pier and spliced ​​together to form a complete outer cover plate. This installation method avoids the problem of insufficient space in the vertical direction to install the outer cover plate, thereby reducing the construction difficulty for workers.

[0012] Preferably, the splicing assembly includes a locking rod, which includes a first locking rod and a second locking rod, and each of the locking rods is fixed to the top of the pier; each of the locking rods is provided with a first locking groove and a second locking groove, and one side of a splicing monomer is installed on the first locking rod through the first locking groove of the first locking rod, and the other side is installed on the second locking rod through the second locking groove of the second locking rod; the splicing assembly also includes a locking piece for locking the splicing monomer installed on the locking rod.

[0013] By adopting the above technical solution, after the splicing unit is hoisted into place, it is installed on the locking rod through the installation groove, thereby achieving the pre-positioning of the splicing unit. At the same time, the splicing unit is connected to the locking rod to improve the stability of the splicing unit on the pier; the workers then use the locking piece to lock the splicing unit to complete the installation of the outer panel.

[0014] Preferably, the locking member comprises a bidirectional threaded rod, and different threaded sections of the bidirectional threaded rod are respectively threadedly connected to the two splicing units.

[0015] By adopting the above technical solution, workers only need to twist the two-way threaded rod to lock the two splicing units, which facilitates quick construction.

[0016] Preferably, the bridge pier is pre-buried with a sleeve, the sleeve is provided with an internal thread, the locking rod is provided with an external thread, and the locking rod is threadedly connected to the sleeve.

[0017] By adopting the above technical solution, when installing the locking rod, the worker aligns the locking rod with the sleeve and twists it, which can quickly fix the locking rod on the pier, facilitate the subsequent construction of the outer panel, and speed up the construction.

[0018] Preferably, a plurality of anti-pullout nails are provided on the inner wall of the outer covering plate.

[0019] By adopting the above technical solution, after pouring concrete, the anti-pullout nails are located in the concrete, thereby increasing the contact area between the outer cover plate and the concrete, thereby improving the stability of the outer cover plate on the bridge pier.

[0020] Preferably, a fixing plate is provided at one end of the anti-pullout nail away from the connection point.

[0021] By adopting the above technical solution, the surface of the fixed plate is parallel to the surface of the outer cladding plate, and after pouring concrete into the outer cladding plate, the pull-out resistance of the outer cladding plate in the horizontal direction can be improved.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The outer cover plate is placed on the unfinished steel frame of the pier. When pouring concrete into the outer cover plate, the outer cover plate is directly cast with the pier as a template, which improves the connection between the outer cover plate and the pier, thereby providing stronger support for the bracket;

[0024] 2. Divide the outer cladding plate into two units, move the two units from the side to the top of the pier and splice them together to form a complete outer cladding plate; this installation method avoids the problem of insufficient vertical space to install the outer cladding plate, and reduces the difficulty of construction for workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the state when the bridge pier and the bracket are connected in the embodiment of the present application.

[0026] Figure 2 It is a structural schematic diagram of the connection between the bridge pier and the outer cladding plate in an embodiment of the present application.

[0027] Figure 3 This is a top view of the outer covering plate of the embodiment of the present application when installed.

[0028] Description of reference numerals:

[0029] 1. Bridge pier; 11. Boss; 12. Mounting groove; 2. Outer plate; 21. Anti-pullout nail; 22. Fixing plate; 23. Splicing unit; 3. Splicing assembly; 31. Locking rod; 311. First locking rod; 312. Second locking rod; 32. Bidirectional threaded rod; 33. First locking groove; 34. Second locking groove. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The embodiment of the present application discloses a precise installation structure for the outer steel plate of the steel-concrete joint section of the pier top with low clearance, and the installation structure is used in conjunction with the pier and the outer steel plate. Figure 1 and Figure 2 The installation structure includes a boss 11 arranged on the top of the pier 1, the cross-sectional area of ​​the boss 11 is smaller than the cross-sectional area of ​​the pier 1, a steel skeleton is reserved on the boss 11 of the pier 1, and an outer plate 2 is sleeved on the boss 11 and is located outside the steel skeleton; a mounting groove 12 is opened at the top of the pier 1 and along the outer circumference of the boss 11, and the outer plate 2 is inserted into the pier 1 in the vertical direction through the mounting groove 12; when constructing the pier 1, the outer plate 2 is directly used as a template for part of the pier body, and concrete is poured into the outer plate 2. The concrete firmly combines the outer plate 2 with the pier body, so that the connecting frame can be stably connected to the pier body of the pier 1, thereby strengthening the pull-out strength of the bracket, and providing a good foundation for dragging the steel cap beam.

[0032] Reference Figure 2 A plurality of anti-pullout nails 21 are arranged on the inner wall of the outer cover plate 2, and a fixing plate 22 is arranged at the end of each anti-pullout nail 21 away from the connection, and each fixing plate 22 is parallel to the side wall of the outer cover plate 2 where the corresponding anti-pullout nail 21 is located; the contact area between the outer cover plate 2 and the concrete is increased by the anti-pullout nails 21 and the fixing plates 22, and the resistance of the concrete to the outer cover plate 2 is increased when the outer cover plate 2 tilts outward, thereby enhancing the connection stability between the outer cover plate 2 and the pier 1.

[0033] Reference Figure 2 and Figure 3 The outer cladding plate 2 includes a pair of splicing monomers 23. The cross-sectional shape of the splicing monomers 23 can be L-shaped, arc-shaped or other shapes. In the present embodiment, the cross-sectional shape of the splicing monomers 23 is L-shaped. One side of each splicing monomer 23 is connected to the other side of another splicing monomer 23. The outer cladding plate 2 is provided with a splicing assembly 3 for splicing two splicing monomers 23 installed on the pier 1.

[0034] Reference Figure 3The splicing assembly 3 includes a locking rod 31, which includes a first locking rod 311 and a second locking rod 312. Each locking rod 31 is fixed to the top of the pier 1; each locking rod 31 is provided with a first locking groove 33 and a second locking groove 34. One side of a splicing monomer 23 is installed on the first locking rod 311 through the first locking groove 33 of the first locking rod 311, and the other side is installed on the second locking rod 312 through the second locking groove 34 of the second locking rod 312; the splicing assembly 3 also includes a splicing monomer 23 installed on the locking rod 31. A locking piece for locking; the locking piece includes a bidirectional threaded rod 32, which is simultaneously passed through the two splicing monomers 23; during installation, the two splicing monomers 23 are respectively slid into the pier 1 from opposite ends in the horizontal direction until they are inserted into the locking rod 31, thereby avoiding the vertically extending steel bar skeleton and being installed on the pier 1, and then the bidirectional threaded rod 32 is twisted to drive the splicing monomers 23 at both ends of the bidirectional threaded rod 32 to move towards each other and press against the boss 11, and the bidirectional threaded rod 32 gradually tightens the splicing monomers 23 on both sides to fix them on the locking rod 31.

[0035] The pier 1 is pre-buried with a sleeve, the sleeve is provided with an internal thread, the end of the locking rod 31 is provided with an external thread, and the locking rod 31 is threadedly connected to the sleeve. When installing the locking rod 31, the locking rod 31 can be fixed by directly screwing it into the sleeve, thereby speeding up the construction speed.

[0036] The implementation principle of the precise installation structure of the outer steel plate of the steel-concrete joint section at the pier top with low clearance in the embodiment of the present application is as follows: when workers build the pier 1, they first set a boss 11 and a sleeve on the pier top, and after the concrete solidifies, they align the locking rod 31 with the sleeve and twist the locking rod 31 to fix the locking rod 31 on the pier 1; at this time, the workers wedge the two splicing monomers 23 of the outer plate 2 into the locking rod 31 respectively, and then twist the two-way threaded rod 32 to move the two splicing monomers 23 towards each other, thereby locking them on the locking rod 31; finally, concrete is poured into the outer plate 2 so that the outer plate 2 and the pier 1 are connected as a whole.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A precise installation structure for the outer steel plate of the steel-concrete joint section of the lower pier top with low clearance, the installation structure is used in conjunction with the pier (1) and the outer steel plate (2), and is characterized in that: The mounting structure comprises a boss (11) arranged on the top of the pier (1), the cross-sectional area of ​​the boss (11) being smaller than the cross-sectional area of ​​the pier (1), the pier (1) being provided with a steel reinforcement frame reserved on the boss (11), and the outer covering plate (2) being sleeved on the boss (11) and located outside the steel reinforcement frame.

2. According to claim 1, a precise installation structure of the outer steel plate of the steel-concrete joint section of the low headroom lower pier top is characterized in that: The bridge pier (1) is provided with a mounting groove (12) at the top of the pier and along the circumference of the boss (11), and the outer covering plate (2) is inserted into the bridge pier (1) in a vertical direction through the mounting groove (12).

3. According to claim 2, a precise installation structure of the outer steel plate of the steel-concrete joint section of the low clearance lower pier top is characterized in that: The outer cladding plate (2) comprises a pair of splicing monomers (23), and the outer cladding plate (2) is provided with a splicing assembly (3) for splicing the two splicing monomers (23) installed on the pier (1).

4. According to claim 3, a precise installation structure of the outer steel plate of the steel-concrete joint section of the low clearance lower pier top is characterized in that: The splicing assembly (3) comprises a locking rod (31), wherein the locking rod (31) comprises a first locking rod (311) and a second locking rod (312), and each of the locking rods (31) is fixedly mounted on the top of the pier (1); a first locking groove (33) and a second locking groove (34) are provided on the rod body of each of the locking rods (31); one side of a splicing monomer (23) is mounted on the first locking rod (311) through the first locking groove (33) of the first locking rod (311), and the other side is mounted on the second locking rod (312) through the second locking groove (34) of the second locking rod (312); the splicing assembly (3) also comprises a locking member for locking the splicing monomer (23) mounted on the locking rod (31).

5. According to claim 4, a precise installation structure of the outer steel plate of the steel-concrete joint section of the low headroom lower pier top is characterized in that: The locking member comprises a bidirectional threaded rod (32), and different threaded sections of the bidirectional threaded rod (32) are respectively threadedly connected to the two splicing units (23).

6. The precise installation structure of the steel-concrete joint section of the low-headroom lower pier top according to claim 4 is characterized in that: The bridge pier (1) is pre-buried with a sleeve, the sleeve is provided with an internal thread, the locking rod (31) is provided with an external thread, and the locking rod (31) is threadedly connected to the sleeve.

7. The precise installation structure of the steel-concrete joint section of the low-headroom lower pier top according to claim 1 is characterized in that: A plurality of anti-pullout nails (21) are arranged on the inner wall of the outer covering plate (2).

8. The precise installation structure of the steel-concrete joint section of the low-headroom lower pier top according to claim 7 is characterized in that: A fixing plate (22) is provided at one end of the anti-pullout nail (21) away from the connection point.

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