No. 0 block construction bracket and reverse tension preloading method thereof

A bracket and tension technology, applied in the field of 0# block construction bracket and its reverse tension preloading, can solve the problem of not being able to clearly determine the retraction amount of the anchor, the retraction amount of the steel strand, the subsidence amount of the bracket, and the process. It is difficult to control the grading pressure, and the difficulty of operation cannot be realized, so as to achieve the effect of expanding the scope of use, reducing the difficulty of construction, and reducing the cost of investment.

Inactive Publication Date: 2019-09-06
中铁二十三局集团第六工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the process of staged tensioning and decompression, the large retraction of the steel strand leads to a large loss of prestress, and the pressure of the process stage is difficult to control. It is impossible to clearly judge the retraction of the anchorage, the retraction of the steel strand and the sinking of the bracket. ;
[0008] When the steel strand is initially installed in place, due to the vertical natural slack and inclination, the stress at multiple points is uneven, resulting in eccentric loads, which will lead to dangerous accidents of the bracket overturning, unless pre-tightening work and equi

Method used

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  • No. 0 block construction bracket and reverse tension preloading method thereof
  • No. 0 block construction bracket and reverse tension preloading method thereof
  • No. 0 block construction bracket and reverse tension preloading method thereof

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Embodiment Construction

[0028] figure 1 It is a structural schematic diagram of the present invention, figure 2 for figure 1As shown in the figure, the 0# block construction bracket in this embodiment includes a bracket body, and the bracket body includes a bracket I21 and a bracket II22 symmetrically arranged on the outside of the two high piers, symmetrically arranged on the Bracket III23 and bracket IV24 inside the two high piers, the bracket I21 and the bracket III23 are relatively arranged on the high pier I11, and the bracket II22 and the bracket IV24 are relatively arranged on the high pier II12 , the high pier I11 is pre-embedded with an upper bracket I111 and a lower bracket I112 for installing the bracket I21 and the bracket III23, and the high pier II12 is pre-embedded with a bracket for installing the bracket The upper frame II121 and the lower frame II122 of the frame II22 and the bracket IV24, the bracket I21 includes a beam I31 mounted on the right end of the upper frame I111 at one...

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Abstract

The invention discloses a No. 0 block construction bracket and a reverse tension preloading method thereof. By virtue of reverse tension of jacks, the measurement of force borne by each important joint and the measurement of elongation of tie rods, the bracket construction is realized gradually and quickly; compared with a traditional construction method, the No. 0 block construction bracket and the reverse tension preloading method thereof save the construction time and reduce the construction difficulty; steel strands are saved and the cost input is reduced; materials and equipment used areall reusable so as to avoid extra waste of the steel strands; the application range is expanded and restrictive conditions are reduced; the No. 0 block construction bracket and the reverse tension preloading method thereof can be applied to all projects which are restricted by the environment and which can not be constructed according to the conventional preloading method; the reverse tension preloading method disclosed by the invention can detect many joints, and can simulate the state more effectively; and the preloading of each key joint is performed through the jacks so as to ensure the engineering quality and effectively solve the preloading problems in the construction process.

Description

technical field [0001] The invention relates to the technical field of high pier construction, in particular to a 0# block construction bracket and a reverse tension preloading method thereof. Background technique [0002] With the rapid development of economy and technology, the construction of transportation infrastructure has also developed rapidly. The development of roads and bridges has promoted the intercommunication between various regions. In more and more bridge constructions, it is necessary to apply preloading to bridges. Do pre-stress tests. [0003] For example, in the construction of the Zaodu River Bridge in Chongqing, the height of the main pier body of the pier is up to 83 meters, and the safety risk of preloading on the top of the pier is high, and the steel strand bundle needs to be installed vertically upwards, which involves anchoring through the bottom of the pier and on the top of the pier The tools are not positioned properly, and there is a risk of...

Claims

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Application Information

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IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 王峰李小军杨建明徐贤德孙长德邓涛张勇王啸白欢熊思平崔永范金生戚晋田王宪明张宏帅
Owner 中铁二十三局集团第六工程有限公司
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