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Static-load bracket preloading construction method of continuous beam

A construction method and preloading technology, which is applied to bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as high construction costs and affecting construction progress, and achieve the effects of light structure, convenient disassembly and assembly, and safe and reliable operation

Inactive Publication Date: 2012-06-13
NO 6 ENG CO LTD OF CHINA RAILWAY NO 3 ENG GRP
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Problems solved by technology

[0003] In order to solve the problem that the preloading of existing brackets is mainly carried out by sand bags, which affects the construction progress and the construction cost is high, the invention provides a construction method for static load preloaded brackets of continuous beams

Method used

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  • Static-load bracket preloading construction method of continuous beam
  • Static-load bracket preloading construction method of continuous beam
  • Static-load bracket preloading construction method of continuous beam

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Embodiment Construction

[0021] The specific embodiments of the present invention will be further described with reference to the accompanying drawings.

[0022] 1. Construction method of continuous beam static load preload bracket, the steps are as follows:

[0023] 1. Pre-embedded fine-rolled threaded steel bar

[0024] During the construction of the bearing platform 12, according to the bracket preload anchor point layout diagram in the bearing platform 12 (according to the vertical corresponding position of each part of the continuous beam in the bearing platform, the number of finishing threaded steel bars at the corresponding position of the continuous beam part The maximum tensile force of ×85% finishing threaded steel bar is ≥ 1.2 times the construction load of the continuous beam part, and the finishing threaded steel bar is pre-embedded. When pre-embedding, the anchor plate 7 and the nut are used at the lower part of the finishing threaded steel bar 11 as the Reinforce anchor points. W...

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Abstract

The invention belongs to the technical field of bracket preloading construction of continuous beams, in particular to a static-load bracket preloading construction method of a continuous beam, solving the problems the construction progress is influenced and the construction cost is high in the traditional bracket preloading. The static-load bracket preloading construction method comprises the following steps of: pre-embedding finished deformed bars, and paving a front joist and a rear joist on the top surface of a bracket; installing bottom module systems on the top surfaces of the front joist and the rear joist; installing longitudinal and transverse distribution beams on the top surfaces of the bottom module systems; introducing the top ends of the finished deformed bars into the top surfaces of the transverse distribution beams through connectors; installing a tensioning system; carrying out fractional preloading on the finished deformed bars; and unloading step by step after preloading. The static-load bracket preloading construction method disclosed by the invention has the beneficial effects that materials related to a hanging bracket and a beam body of the continuous beam are effectively used as loading load, transfer force and distribution force; the advantages of convenience and simpleness for operation, light structure, convenience for assembly and disassembly and short circulation cycle are achieved; rapid and safe bracket preloading can be realized; the stress state of the bracket can be simulated more accurately; and safer and more reliable operation and better economic benefit are achieved.

Description

technical field [0001] The invention belongs to the technical field of continuous beam bracket preloading construction, and particularly relates to a continuous beam static load preloading bracket construction method. Background technique [0002] With the rapid development of high-speed railways and expressways, continuous beams of high bridge piers across highways, railways and rivers have gradually increased. The original construction method of bracket preloading is to use the method of hoisting sandbags for preloading. This construction method has many disadvantages. First, the amount of sand and sandbags in the preloading process is large, and the cost is relatively high. Second, it cannot be used. It is a good simulation of the real load conditions during concrete pouring. The final construction period is relatively long. Generally, it takes 3 days to hoist the sand bag, and it also takes 2 to 3 days to unload. SUMMARY OF THE INVENTION [0003] In order to solve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 吴初福李冠东秦德进李存虎郝四旺游中建王建亮袁晓红樊为民王振宇
Owner NO 6 ENG CO LTD OF CHINA RAILWAY NO 3 ENG GRP
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