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Long-span slow bonded prestressed reinforced concrete beam and its construction method

A slow-bonded prestressed and reinforced concrete beam technology, which is applied in the fields of formwork/formwork/working frame, preparation of building components on site, and processing of building materials, can solve environmental pollution, difficulty in positioning prestressed tendons, and structural problems. Insufficient performance and other problems, to achieve the effect of convenient construction, simple and reasonable node layout, and improve construction efficiency

Active Publication Date: 2022-05-27
CONSTR & INSTALLATION ENG THE THIRD ENG GROUP OF CHINA RAILWAY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a large-span slowly bonded prestressed reinforced concrete beam and its construction method with simple implementation, high positioning accuracy, good construction quality, and green environmental protection, so as to solve the problems raised in the background technology. The unbonded prestressed tendons and the bonded prestressed tendons caused insufficient structural performance of the beam, the difficulty in positioning the prestressed tendons in the long-span slow bonded prestressed beams, and the technical problems that easily caused environmental pollution during construction.

Method used

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  • Long-span slow bonded prestressed reinforced concrete beam and its construction method
  • Long-span slow bonded prestressed reinforced concrete beam and its construction method
  • Long-span slow bonded prestressed reinforced concrete beam and its construction method

Examples

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Effect test

Embodiment 1

[0044] like Figure 1-10 As shown, the large-span slow-bonded prestressed reinforced concrete beam includes a large-span slow-bonded prestressed beam and a prestressed tendon positioning device.

[0045] The long-span slow-bonded prestressed beam includes a formwork system, a support structure 2, a prestressed tension end member, a prestressed fixed end member, a beam reinforcement 4 and a slow-bonded prestressed tendon 7; the formwork system includes a plate. Formwork 1, tensioned end casting formwork 3, beam formwork 8, column formwork 9, beam formwork 8 is set on the side of the prestressed beam, plate formwork 1 is set on the upper part of the prestressed beam, and column formwork 9 is set below the prestressed beam; The formwork 1, the beam formwork 8 and the column formwork 9 are supported and fixed by the support structure 2, and the support structure 2 is erected by steel scaffolding; the tensioned end casting formwork 3 is a steel formwork, including the base plate 10...

Embodiment 2

[0055] The construction method of long-span slow-bonded prestressed reinforced concrete beams, the main steps are as follows:

[0056] S1: Construction preparation: incoming raw materials, acceptance, preparation of formwork system, slow-bonding prestressed tendons 7, non-prestressed steel bars, prestressed anchors, etc. required for construction;

[0057] S2: Bottom form laying: Lay the bottom form of the prestressed reinforced concrete beam, preset the back arch of the bottom form according to the back arch value provided by the design, and the back arch value needs to be adjusted appropriately according to the actual construction and the tension of the beam;

[0058] S3: Installation of non-prestressed steel skeleton: Before binding the steel bars, clean the bottom mold and apply a layer of release agent. The steel bars are installed and bound in a certain order in strict accordance with the construction drawings, and care should be taken to place the pads reasonably to ensu...

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Abstract

The invention relates to a large-span slow-bonded prestressed reinforced concrete beam, which includes a large-span slow-bonded prestressed beam and a prestressed tendon positioning device; the long-span slow-bonded prestressed beam includes a formwork system, a support structure, Prestressed tension end components, prestressed fixed end components, beam reinforcement and slow bonded prestressed tendons; the formwork system includes slab formwork, tension end pouring formwork, beam formwork and column formwork, and the slab formwork, beam formwork Both formwork and column formwork are supported and fixed by supporting structures. The beneficial effects of the present invention are: the node arrangement of slow-bonded prestressed tendons in the present invention is simple and reasonable, no need to reserve holes and pressure drops, and reduces the discharge of pollutants; the present invention has simple components, convenient assembly and construction, and convenient disassembly , the formwork system can be reused many times, and the application form is flexible; the invention can ensure the smoothness of the slow-bonded prestressed reinforcement curve, and significantly improve the site construction efficiency.

Description

technical field [0001] The invention belongs to the technical field of building construction, and particularly relates to a large-span slow-bonding prestressed reinforced concrete beam and a construction method. Background technique [0002] In recent years, with the great improvement of engineering technology level and the growing demand for individualization, the domestic construction market has an increasing demand for open and large space; prestressed beam technology has the characteristics of low self-weight, high stiffness, anti-cracking, and strong anti-deformation ability. It has good adaptability to large-span and large-load structures. [0003] Traditional prestressed beams use unbonded prestressed tendons or bonded prestressed tendons. Unbonded prestressed tendons have the disadvantage of insufficient structural performance, while the construction of bonded prestressed tendons needs to arrange holes and pressure drops. The process is complex and produces a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G13/04E04G21/12E04G13/02E04B1/22
CPCE04G13/04E04G21/12E04G13/02E04B1/22
Inventor 刘洋石建彬徐建陇宋涛秦鹏薛德民郭利红程秀茹
Owner CONSTR & INSTALLATION ENG THE THIRD ENG GROUP OF CHINA RAILWAY
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