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Method for designing prestress adjustable support for detecting and strengthening

A design method and prestressing technology, applied in bridge reinforcement, erection/assembly of bridges, bridge construction, etc., can solve the problems of large steel consumption at the lower edge of the bracket, unrealizable load, and occupation of bearing capacity, so as to reduce self-weight and manufacture The assembly process is simple and feasible, and the effect of reducing the amount of materials used

Inactive Publication Date: 2014-07-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to carry the load of its own gravity, various bridge inspection equipment and inspection and maintenance personnel, the general bridge inspection bracket often uses a large amount of steel on the lower edge of the bracket, which further increases the self-weight and occupies most of the bearing capacity of the bridge bracket. Unable to add larger loads
Especially when the bridge is wider, a support with a larger span is required, and when the span of the support becomes larger, the self-weight will increase rapidly, and its operability will be more difficult
Sometimes it is necessary to build an expensive full-scale bracket, and the full-scale bracket is not only expensive, but also has many safety hazards

Method used

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  • Method for designing prestress adjustable support for detecting and strengthening
  • Method for designing prestress adjustable support for detecting and strengthening
  • Method for designing prestress adjustable support for detecting and strengthening

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: as Figure 1-4 Shown, a kind of method for designing the prestressed adjustable support for detection and reinforcement, the specific steps of the method are as follows:

[0025] 1. Position the four pieces of light alloy material II4 through the four pieces of light alloy material I2 at the end to form the basic skeleton of the bridge detection bracket;

[0026] 2. The light alloy material I2 is used to arrange horizontal, vertical and oblique supports on the side and bottom of the support at equal intervals. On the top surface, only two horizontal supports are arranged on the upper edge of the end of the support to form the purlin part of the truss structure. enhance the local stability of the scaffold;

[0027] Three, according to Determining the tensile control stress of the adjustable prestressed steel beam 3 f pd ; where, M x , M y around the same section x axis and y shaft bending moment, , Take 1.0 for the section plastic development...

Embodiment 2

[0036] Embodiment 2: as Figure 1-4 Shown, a kind of design method of prestressed adjustable support for detection and reinforcement, a kind of design method of prestressed adjustable support for detection and reinforcement, the concrete steps of described method are as follows:

[0037] 1. Position the 4 pieces of space aluminum 6061-L100×50×5 through the 4 pieces of space aluminum 6063-L70×50×5 at the end to form the basic skeleton of the bridge detection bracket;

[0038] 2. Use space aluminum 6063-L70×50×5 to arrange horizontal, vertical and oblique supports on the side and bottom of the support at equal intervals. On the top surface, only two horizontal supports are arranged on the upper edge of the end of the support to form a truss structure The purlin part of the bracket enhances the local stability of the bracket;

[0039] Three, according to Determining the tensile control stress of the adjustable prestressed steel beam 3 f pd ; where, M x , M y around the s...

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Abstract

The invention relates to a method for designing a prestress adjustable support for detecting and strengthening, and belongs to the field of detecting and strengthening of bridges and tunnels in civil engineering. According to the method for designing the prestress adjustable support for the detecting and the strengthening, steel wire ropes, light high-strength alloy materials I, adjustable prestressed steel, light high-strength alloy materials II, anchorage devices and anchoring steel plates are included. Through the application of prestress, the material consumption of the lower edge of the support can be reduced so as to achieve the purpose of lowering the self weight; due to the adjustability of the tensile force of prestressed steel bars, a working platform of the support can be economically and widely applied to bridge detecting, strengthening and maintaining tasks with various bearing requirements, the structural deformation is reduced, and the problems of the bearing capability and the safe using of the bridge detecting support are solved fundamentally. The self weight of the working platform of the support is lowered, meanwhile, the self rigidity and the spanning capability of the structure can be improved, the application range of the bridge detecting support can be expanded through the adjustability of the tensile force of the prestressed steel bars, and thus the working platform of the bridge detecting support can be repeatedly used.

Description

technical field [0001] The invention relates to a design method of a prestressed adjustable support for detection and reinforcement, which belongs to the field of detection and reinforcement of civil engineering bridges and tunnels. Background technique [0002] At present, the bridge detection bracket we see is composed of upper fixing device, safety lock, electrical control box, hoist, working platform and suspension cable. Fix the upper fixing device to the upper part of the bridge, pass the steel wire rope through the upper fixed structure, hang the steel wire rope, assemble the detection bracket platform, install the lifting safety cable, check and confirm that the installation is correct, and perform a trial run. In order to carry the load of its own gravity, various bridge inspection equipment and inspection and maintenance personnel, the general bridge inspection bracket often uses a large amount of steel on the lower edge of the bracket, which further increases the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
Inventor 李睿杨琴修振宇康二川
Owner KUNMING UNIV OF SCI & TECH
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