Prestressed Tensioning Operation Platform for Pier Cap under Confined Space

Abstract

The present invention relates to a prestressed tensioning operation platform for a capping beam in a confined space, which includes an upper cross beam, vertical poles, wire mesh sheets, a lower cross beam, a chassis, and a cantilever beam. The upper cross beam at the top is welded and connected to the lower cross beam by two vertical poles on the left and right. Multiple middle upper cross beams are welded in the middle of the two vertical poles. A wire mesh sheet is welded between the lowermost upper cross beam and the lower cross beam to form a tensioning operation platform sheet frame. The two tensioning operation platform sheet frames are welded together through the chassis to form a tensioning operation platform. By adopting the prestressed tensioning operation platform for the capping beam in a confined space of the present invention, advantages such as simplifying the erection of the operation platform for the capping beam in a confined space, improving the safety during the operation process, and enabling the smooth prestressed tensioning operation of the steel strands can be achieved. It has important reference value for the installation construction of similar prefabricated and assembled elevated bridges and has significant social benefits.

Description

Technical Field

[0001] The present invention relates to a prestressed tensioning operation platform for a precast and assembled elevated bridge capping beam under limited space conditions, which can effectively improve the work efficiency, safety, standardization of prestressed tensioning, and ensure the quality. Background Art

[0002] Prestressed tensioning of precast capping beams is an essential process to ensure that the components eliminate adverse bending moments and make the structure in a better compressive stress state during the construction of precast and assembled elevated bridges. In the past, the operation platforms for capping beam prestressed tensioning under limited space were relatively simple and diverse, and the safety, work efficiency, and tensioning quality of high-altitude construction could not be guaranteed.

[0003] With the development and popularization of the precast and assembled process of elevated bridges, creating a safe and civilized construction site plays an inestimable role in establishing a good corporate image and ensuring construction safety and quality. The concept of green construction has become an important idea guiding engineering construction. Therefore, to improve safety and work efficiency, the operation platform for capping beam prestressed tensioning under limited space is a crucial link and an indispensable part of the whole process. Summary of the Invention

[0004] In view of the above situation, the present invention provides a prestressed tensioning operation platform for a capping beam under limited space of a precast and assembled elevated bridge. By using a small amount of construction materials, this platform improves the safety and work efficiency of capping beam prestressed tensioning under limited space, and is also a symbolic part of standardized construction.

[0005] To achieve the above object, the technical solution of the present invention is: A capping beam prestressed tensioning operation platform under limited space, including an upper cross beam, vertical poles, wire mesh sheets, a lower cross beam, a chassis, and cantilever beams. The upper cross beam at the top is welded and connected to the lower cross beam by two vertical poles on the left and right. Multiple middle upper cross beams are welded in the middle of the two vertical poles. A wire mesh sheet is welded between the lowermost upper cross beam and the lower cross beam to form a tensioning operation platform frame; the two tensioning operation platform frames are welded together by the chassis to form a tensioning operation platform.

[0006] Further, fixed ears are welded at both ends of the upper cross beam.

[0007] Further, the chassis is composed of longitudinal beams and secondary beams. The two longitudinal beams are welded together by multiple parallel secondary beams, and are welded and fixed to the lower cross beam of the tensioning operation platform frame through the longitudinal beams.

[0008] Further, during use, the tensioning operation platform is erected between two capping beams by two cantilever beams inserted under the upper cross beam, and the position of the cantilever beams can be adjusted up and down according to the size of the capping beam.

[0009] The beneficial effects of the present invention are as follows:

[0010] The present invention can improve the prestress tensioning of precast assembled elevated bridge deck girders to ensure construction safety, construction quality and standardization in a restricted space. The tensioning operation platform has the characteristics of simple production, flexibility in use and repeated utilization.

[0011] By using the operation platform for prestress tensioning of girders in a restricted space of the present invention, it is possible to simplify the erection of the operation platform for girders in a restricted space, improve the safety during the operation process and enable the smooth prestress tensioning operation of steel strands. It has important reference value for the installation construction of similar precast assembled elevated bridges and has significant social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional schematic diagram of the structure of the operation platform for prestress tensioning of girders in a restricted space of the present invention;

[0013] Figure 2 is a plan schematic diagram of the structure of the operation platform for prestress tensioning of girders in a restricted space of the present invention;

[0014] Figure 3 is a structural diagram of the bottom of the operation platform for prestress tensioning of girders in a restricted space of the present invention;

[0015] Figure 4 is a schematic diagram of the use state of the structure of the operation platform for prestress tensioning of girders in a restricted space of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following is a detailed description of the case of the present invention in conjunction with the drawings: This case is implemented on the premise of the technical solution of the present invention, and the detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following cases.

[0017] As Figures 1 to 3 shown, the operation platform for prestress tensioning of girders in a restricted space of the present invention includes an upper cross beam 1, fixed ears 2, vertical poles 3, wire mesh sheets 4, a lower cross beam 5, longitudinal beams 6, secondary beams 7, and cantilever beams 8.

[0018] The upper cross beam 1 at the top and the lower cross beam 5 are welded and connected by two vertical poles 3 on the left and right. Multiple middle upper cross beams are welded in the middle of the two vertical poles 3. A wire mesh sheet 4 is welded between the last upper cross beam and the lower cross beam 5 to form a tensioning operation platform frame. The two tensioning operation platform frames are welded together by a bottom frame to form a tensioning operation platform. Fixed ears 2 are welded at both ends of the upper cross beam 1.

[0019] The bottom frame is composed of longitudinal beams 6 and secondary beams 7. The two longitudinal beams 6 are welded together by multiple parallel secondary beams 7 and are welded and fixed to the lower cross beam 5 of the tensioning operation platform frame through the longitudinal beams 6.

[0020] During use, the tensioning operation platform is erected on two capping beams through two cantilever beams 8 connected under the upper cross beam 1. The position of the cantilever beam 8 can be adjusted up and down according to the size of the capping beam.

[0021] As Figure 4 shown, the erection of the capping beam prestressing tensioning operation platform in a confined space. The example of the capping beam prestressing tensioning operation platform in a confined space includes: the operability of the tensioning operation platform, splicing and assembling the tensioning operation platform in the back field according to the limited space of the on-site capping beam, and then transporting it to the erection position required for tensioning of the corresponding capping beam, and using a crane for erection.

[0022] The tensioning operation platform is constructed of steel structure, and the size of the foundation can be designed according to the on-site conditions, and channel steel and wire mesh are selected for welding and assembly.

Claims

1. A prestressed tensioning operation platform for a capping beam in a confined space, characterized in that: It includes an upper cross beam, vertical poles, wire mesh sheets, a lower cross beam, a chassis, and a cantilever beam. The upper cross beam at the top is welded and connected to the lower cross beam by two vertical poles on the left and right. Multiple middle upper cross beams are welded in the middle of the two vertical poles. A wire mesh sheet is welded between the lowermost upper cross beam and the lower cross beam to form a tension operation platform sheet rack; two tension operation platform sheet racks are welded together through the chassis to form a tension operation platform. The chassis includes longitudinal beams and secondary beams. The longitudinal beams are arranged in parallel and are welded and fixed by multiple secondary beams, and the longitudinal beams are welded and connected to the lower cross beam of the sheet rack.

2. The prestressed tensioning operation platform for the lower cover beam in a confined space according to claim 1, wherein: Fixed ears are welded at both ends of the upper cross beam.

3. The prestressed tensioning operation platform for the lower cover beam in a confined space according to claim 1, wherein: The secondary beams are arranged in parallel at intervals and are perpendicularly welded to the longitudinal beams.

4. The prestressed tensioning operation platform for the lower cover beam in a confined space according to claim 1, wherein: During use, the tension operation platform is erected between two capping beams through two cantilever beams threaded under the upper cross beam, and the position of the cantilever beam can be adjusted up and down according to the size of the capping beam.

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