Side formwork for synchronous construction of arch bridge suspender anchoring cross beam and suspended pouring section

Abstract

The utility model discloses a side formwork system for synchronous construction of an arch bridge suspender anchoring cross beam and a suspended pouring section. The side formwork system is suitable for municipal, railway and highway bridge engineering. In the prior art, a cross beam structure and a suspended pouring section cannot be constructed synchronously, so that concrete cannot be poured integrally, meanwhile, forward movement of a template is blocked, and the construction efficiency is influenced. The side formwork system is divided into the fixed part and the movable part, and the detachable cross beam formwork is adopted, so that the formwork system can meet the requirements of different construction stages, synchronous pouring of cross beam and suspended pouring section concrete is achieved, construction joints are avoided, and the construction quality is improved. According to the utility model, the construction difficulty is reduced, the construction safety is improved, and the high-altitude operation time is shortened.

Description

Technical Field

[0001] This patent relates to steel formwork equipment used in arch bridges of municipal engineering, railway engineering, and highway engineering. Background Technology

[0002] A hanging basket is an assembly and disassembly device. Its individual components are lightweight, allowing for smooth assembly and disassembly without the need for large lifting machinery. Due to its ease of assembly and disassembly, it is frequently used by technicians in the field for long-span bridge construction. This process involves segmental cast-in-place concrete pouring, followed by prestressing and then moving the formwork forward on guide rails. Currently, in beam-arch composite bridge structures using the "beam-first, arch-later" method, concrete crossbeams are often installed on the beam flanges for anchoring the hangers. However, the crossbeam structure and the cantilevered segments cannot be synchronously aligned, leading to problems such as the crossbeams and segment concrete not being poured simultaneously, and the hanging basket system being unable to move forward due to obstruction. Utility Model Content

[0003] The technical problems to be solved by this utility model are: 1) Conventional hanging basket side formwork is a flat formwork, which cannot complete the installation of the reinforcing bars and concrete pouring of the protruding suspension beams, and cannot guarantee the integral pouring of the suspension beams and the beam concrete, which will lead to quality defects. 2) For cantilever segments with suspension beams, a separate integral hanging basket side formwork is made, which is difficult to install and dismantle, has high safety risks, and low work efficiency. 3) When conventional hanging basket formwork moves forward, the protruding beams hinder the forward sliding of the side formwork.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: modify the side formwork and inner formwork of the hanging basket, and divide them into a fixed part and a movable part; adjust the movable formwork to adapt to the requirements of steel bar binding and concrete pouring of beam segments with or without crossbeams.

[0005] The side formwork includes the front formwork of the crossbeam, the formwork at the crossbeam, and the rear formwork of the crossbeam. Specifically: the front formwork of the crossbeam is considered L-shaped and is connected to the side formwork of the crossbeam with bolts; the formwork at the crossbeam is considered rectangular; the rear formwork of the crossbeam is also considered L-shaped and is connected to the formwork at the crossbeam with bolts. The formwork system uses channel steel as longitudinal and transverse back ribs, and the formwork panels are made of steel plates. The back of the side formwork is provided with longitudinal and transverse back ribs, which are made of No. 8 channel steel with a spacing of 40cm. The formwork panels are made of 5mm steel plates. 10mm thick splicing plates are set around the formwork and spliced ​​and fixed with No. 10 equilateral angle steel.

[0006] Compared with the existing technology, the advantages of this utility model are: it reduces the problem of synchronous construction of the cantilevered beam segments, solves the problems of inconvenience of the hanging basket system moving along the longitudinal direction of the beam, the need to repeatedly adjust the hanging basket system according to the presence or absence of the beam, and the poor overall quality of the beam. It also reduces the difficulty and labor intensity of installation, dismantling and hoisting, shortens the high-altitude operation time, and improves construction safety. Attached Figure Description

[0007] Figure 1 A schematic diagram of the arrangement of the suspension beam and the cantilever section of this utility model.

[0008] Figure 2 A schematic diagram of the cross-section of the suspension beam of this utility model.

[0009] Figure 3-1 Schematic diagram of the front end template of the cantilever section crossbeam of this utility model.

[0010] Figure 3-2 A schematic diagram of the formwork at the crossbeam of the cantilever section of this utility model.

[0011] Figure 3-3 Schematic diagram of the rear end formwork of the cantilever section crossbeam of this utility model.

[0012] Figure 4 A schematic diagram of the side formwork assembly of the cantilever section at the position of the crossbeam in this utility model.

[0013] Figure 5 A schematic diagram of the side formwork assembly for the suspended section at the beamless location of this utility model. Detailed Implementation

[0014] The side formwork uses [8 channel steel as the template back rib, and the template panel uses 5mm steel plate; the side formwork and flange plate template are processed and manufactured separately at the outer sliding beam and connected with high-strength bolts; the side formwork is set to 3 pieces in the longitudinal direction.

[0015] The side formwork includes the front formwork of the crossbeam, the formwork at the crossbeam, and the rear formwork of the crossbeam. The front formwork of the crossbeam is L-shaped from the side and is bolted to the No. 10 equilateral angle steel at the contact surface with the side formwork of the crossbeam. The formwork at the crossbeam is rectangular from the side. The rear formwork of the crossbeam is L-shaped from the side and is bolted to the No. 10 equilateral angle steel at the contact surface with the side formwork of the crossbeam.

[0016] The three templates can be combined and merged. The front and rear sections of the templates for the crossbeam can be bolted together. The back of the steel template is equipped with longitudinal and transverse back ribs, which are made of No. 8 channel steel and set at a spacing of 40cm. No. 10 equilateral angle steel and 10mm thick splicing plate are set at the ends.

[0017] In the cantilever section where there is no crossbeam, the side formwork of the box girder is assembled by combining the front formwork of the crossbeam, the formwork at the crossbeam, and the rear formwork of the crossbeam. After the concrete pouring of the cantilever section is completed, the side formwork is moved forward as a whole to the next segment (the segment with the crossbeam). The formwork at the crossbeam is removed, while the front formwork and the rear formwork of the crossbeam are retained. The side formwork, bottom formwork, and end formwork of the crossbeam are assembled at the crossbeam position. Then, the segment and the crossbeam concrete are poured. The segment and the crossbeam concrete are poured at the same time without leaving construction joints. After the concrete pouring is completed, the side formwork, bottom formwork, and end formwork of the crossbeam are removed. The front formwork of the crossbeam is slid to the next segment. After the rear formwork of the crossbeam is removed, auxiliary facilities are used to move the rear formwork of the crossbeam to the next segment.

[0018] The present invention will be further described in detail below with reference to the drawings.

[0019] Figure 1 This is a schematic diagram of the arrangement of the suspender beam and the cantilever section of this utility model. In the construction of the hanging basket method, the concrete beam is poured in segments by cantilever. The segment length of the concrete of the box girder segment (3) is between 3 and 5m. The suspender (2) of the arch bridge and the concrete box girder segment (3) are connected by the crossbeam (1).

[0020] Figure 2 This is a schematic diagram of the cross-section of the suspender beam of this utility model. In the hanging basket construction, the concrete beam is poured in segments using a cantilever method. The segment length of the concrete box girder segment (3) is between 3 and 5 m. The arch bridge suspender (2) and the concrete box girder segment (3) are connected by a crossbeam (1). The concrete box girder segment (3) is connected to the arch rib (4) through the crossbeam (1) and the suspender (2).

[0021] Figure 3-1 This is a schematic diagram of the front end formwork of the cantilever section beam of this utility model. The side formwork includes the front end formwork of the beam, the formwork at the beam, and the rear end formwork of the beam. The front end formwork of the beam is L-shaped from the side and is connected to the side formwork of the beam with equilateral angle steel by bolts. The angle steel is provided with bolt holes. The front end side formwork of the beam uses [8 channel steel as the vertical back rib (2) and the horizontal back rib (1) of the formwork. The formwork panel (6) is made of 5mm steel plate. The four sides of the formwork are spliced ​​plates (3) with a thickness of 10mm and spliced ​​plates (4, 5) with No. 10 equilateral angle steel.

[0022] Figure 3-2 This is a schematic diagram of the formwork for the cantilever section beam of this utility model. The side formwork includes the front formwork of the beam, the formwork at the beam, and the rear formwork of the beam. The formwork at the beam is viewed as a rectangle from the side. The side formwork uses [8 channel steel as the vertical back rib (2) and the horizontal back rib (1) of the formwork. The formwork panel (6) is made of 5mm steel plate. The four sides of the formwork are made of 10mm thick splicing plate (3) and No. 10 equilateral angle steel splicing plate (4).

[0023] Figure 3-3This is a schematic diagram of the rear end formwork of the cantilever section beam of this utility model. The side formwork includes the front end formwork of the beam, the formwork at the beam, and the rear end formwork of the beam. The rear end formwork of the beam is viewed as L-shaped, and the contact surface with the side formwork of the beam is connected by equilateral angle steel with bolts. Bolt holes are provided on the angle steel. The rear end side formwork of the beam uses [8 channel steel as the vertical back rib (2) and the horizontal back rib (1) of the formwork. The formwork panel (6) is made of 5mm steel plate. The four sides of the formwork are spliced ​​plates (3) with a thickness of 10mm and spliced ​​plates (4) with No. 10 equilateral angle steel.

[0024] Figure 4 This is a schematic diagram of the side formwork assembly of the cantilever section at the position of the crossbeam of this utility model. The front end of the crossbeam (1) is the front template (2) of the crossbeam, and the rear end of the crossbeam (1) is the rear template (3) of the crossbeam. The front template (2) of the crossbeam and the rear template (3) of the crossbeam are connected by bolts through No. 10 equilateral angle steel (4).

[0025] Figure 5 This is a schematic diagram of the side formwork assembly for the cantilever section without a crossbeam according to this utility model. The front end of the crossbeam is the front crossbeam formwork (2), the rear end of the crossbeam is the rear crossbeam formwork (3), and the formwork at the crossbeam is (1). The side formwork for the cantilever section without a crossbeam includes the front crossbeam formwork (2), the formwork at the crossbeam (1), and the rear crossbeam formwork (3), and the formwork is connected by bolts using No. 10 equilateral angle steel.

Claims

1. A side formwork for synchronous construction of arch bridge suspender anchorage cross beam and cantilever segment, characterized in that: it comprises a cross beam front end formwork, a cross beam position formwork and a cross beam rear end formwork, wherein: the cross beam front end formwork is L-shaped in side view and is connected to the cross beam side formwork by bolts; the cross beam position formwork is rectangular in side view; the cross beam rear end formwork is L-shaped in side view and is connected to the cross beam position formwork by bolts; channel steel is used as longitudinal and transverse back strakes, and the formwork panel is made of steel plate; the side formwork can be disassembled according to construction requirements, and when there is no cross beam segment, the whole is moved forward, and when there is a cross beam segment, the cross beam position formwork is disassembled and the cross beam side form, bottom form and end form are installed to realize synchronous pouring of the cross beam and the segment concrete.

2. The side formwork according to claim 1, characterized in that: longitudinal and transverse back strakes are arranged on the back side, the longitudinal and transverse back strakes are made of No. 8 channel steel with a spacing of 40 cm; the formwork panel is made of 5 mm steel plate; 10 mm thick splicing plates are arranged around the formwork, and No. 10 equal leg angle steel is used for splicing and fixing. ​ ​ ​ ​ ​ ​ ​

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