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Method for accurately positioning and quickly assembling dry-connection cantilever bent cap

A precise positioning and precise positioning technology, which is applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., to achieve the effect of improving the matching degree of splicing surfaces, reducing the difficulty of manufacturing, and simplifying the temporary fixing process

Inactive Publication Date: 2021-03-02
SHANGHAI FOUND ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of accurate matching and positioning, fast and simple construction during the manufacture and installation of dry-jointed cantilever cover beams, and provides a method for precise positioning and rapid assembly of dry-joint cantilever cover beams

Method used

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  • Method for accurately positioning and quickly assembling dry-connection cantilever bent cap
  • Method for accurately positioning and quickly assembling dry-connection cantilever bent cap
  • Method for accurately positioning and quickly assembling dry-connection cantilever bent cap

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Embodiment Construction

[0022] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0023] Such as Figure 1 to Figure 5 As shown, this embodiment specifically relates to a dry-joint cantilever cover beam precise positioning and rapid assembly method, which is used to hoist a large tonnage cover beam 9 on the top of the column 5; prefabricate a large cantilever cover beam 9 to the left Cantilever section cover beam 1-2, right cantilever section cover beam 1-3 and a middle section 1-1.

[0024] The method specifically includes the following steps:

[0025] (1) Pouring the middle cover beam 1-1; use the splicing surface A of the middle cover beam 1-1 as a formwork, and match the left cantilever section cover beam 1-2 and the right cantilever section cover beam 1-3 on both sides of the pouring , and then obtain the exact matching male-female matching left shear key 2-1, male-female matching right shear key 2-2, ...

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Abstract

The invention relates to a method for accurately positioning and quickly assembling a dry-connection cantilever bent cap, which realizes accurate positioning and quick assembling of the dry-connectioncantilever bent cap by adopting a matched prefabricated segmented bent cap, an accurate positioning and assembling system and a temporary prestress device, and comprises the following steps of: matching the prefabricated segmented bent cap; hoisting a middle-section bent cap; applying epoxy resin binders on the splicing surfaces of the cantilever section bent caps, and matching with male and female paired shear keys and brackets of the splicing surfaces of the bent caps to form a fine positioning splicing system; hoisting the cantilever section bent cap and assembling on the middle section bent cap; installing a temporary prestress device of the segmental bent cap for temporary fixation; in the same way, installing a cantilever section bent cap on the other side; penetrating a capping beam prestressed steel strand; tensioning the prestressed steel strands in a grading manner; and performing grouting after the prestressed steel strands are tensioned. The matched prefabricated segmentedbent caps are adopted, the manufacturing difficulty of the bent cap splicing face formwork is reduced, and the splicing face coincidence degree is greatly improved; and a precise positioning and assembling system is adopted, so that the effects of quick positioning, high-efficiency shearing resistance and torsion resistance can be achieved.

Description

technical field [0001] The invention relates to a method for precise positioning and fast assembly of dry-joined cantilever cover beams, and is especially suitable for precise positioning and fast assembly construction of multi-section prefabricated cover beams. Background technique [0002] In recent years, viaduct roads have increasingly played a role in transportation, and new viaduct projects have emerged continuously. The traditional on-site pouring construction technology of viaducts has gradually faded out of the historical stage of construction due to the disadvantages of low efficiency, high risk, large pollution, and large loss. The bridge prefabrication and assembly technology is replacing traditional crafts by virtue of industrialization, mechanization, standardization, and green construction. [0003] At present, the application of bridge prefabrication and assembly technology in domestic urban elevated rail transit is relatively new, but the assembly technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 连海建张振华李中言刘兆鹏
Owner SHANGHAI FOUND ENG GRP
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