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Construction control method capable of realizing unstressed line shapes of pushing construction beam bodies at high accuracy

A control method and technology of jacking construction, which is applied to bridges, bridge construction, erection/assembly of bridges, etc., and can solve problems such as incomprehensible steps and methods, inconvenient application, etc.

Inactive Publication Date: 2013-01-16
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing methods for realizing the stress-free alignment of the entire length of the jacking beam basically ignore the influence of the above two deviations on the determination of the in-place elevation of the assembled beam section. [9] , but the steps and methods are difficult to understand and inconvenient to apply, so new methods need to be invented

Method used

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  • Construction control method capable of realizing unstressed line shapes of pushing construction beam bodies at high accuracy
  • Construction control method capable of realizing unstressed line shapes of pushing construction beam bodies at high accuracy
  • Construction control method capable of realizing unstressed line shapes of pushing construction beam bodies at high accuracy

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Embodiment Construction

[0115] The present invention will be further described in detail in conjunction with specific implementation examples below.

[0116] 1. Project overview

[0117] The superstructure of the approach bridge in the west of the Xiangjiang River Bridge is a steel-concrete composite structure continuous girder bridge with a single-box single-chamber truss with a large cantilever structure at the same height. The span of the center line of the bridge is (from west to east) 55m+85m+78m+21.785m Figure 5 ), the cross-section of the main beam of the composite structure is as follows Figure 6 shown.

[0118] The approach bridge adopts the construction method of pushing the steel channel girder first and then laying the prefabricated bridge deck: after the steel channel girder is pushed into place, the concrete joint section at the bottom edge of the steel girder on the pier top is poured first, and then the bridge deck is laid in the specified order—now Wet the joints - stretch the ex...

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Abstract

The invention discloses a construction control method capable of realizing unstressed line shapes of pushing construction beam bodies at high accuracy. The construction control method comprises the following steps of: 1) determining in-position real-time phases of a first batch of beam bodies; 2) determining the in-position elevation of the first batch of beam bodies; 3) determining the real-time phases of the first batch of welded beam bodies; 4) solving the conversion elevation of the first batch of welded beam bodies; 5) determining in-position real-time phases of a first batch of beam bodies; 6) determining the in-position elevation of the second batch of beam bodies; 7) determining the real-time phases of the second batch of welded beam bodies; 8) solving the conversion elevation of the second batch of welded beam bodies; and 9) repeating the steps 5) to 8) until all beam sections are spliced on a pushing platform. By the method, the in-position elevation of beam sections to be spliced in real-time phases can be conveniently determined to acquire the actual unstressed line shapes of the spliced beam bodies in interference phases and the deviation between the actual unstressed line shapes and theories, so that the unstressed line shapes of the pushing construction beam bodies can be realized at high accuracy.

Description

technical field [0001] The invention relates to the field of bridge girder construction, in particular to a construction control method for high-precision realization of stress-free alignment of a beam body in jacking construction. Background technique [0002] The beam alignment not only affects the appearance quality of the bridge and the comfort of operation, but also may directly relate to the overall stress status of the bridge, which is one of the key objectives of construction control [1-3] . The beam alignment can be divided into two types: the unstressed alignment of the beam and the stressed alignment of the beam. Once the stress-free line shape of the beam body, the boundary conditions and the external loads it bears are determined, the line shape and stress state of the beam body are determined accordingly. The stress-free line shape of the beam body is determined by the line shape (generally a straight line) of each beam segment that composes the entire length...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/06
Inventor 李传习董创文李尧张玉平柯红军王琛彭亮
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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