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A construction method for off-site hoisting of super-large-span tension truss

A string truss and construction method technology, applied in the processing of building materials, construction, building construction, etc., can solve the problems of structural damage of water delivery corridors, unsuitable for large-scale hoisting equipment, etc., to achieve cost-saving measures, considerable Economic and social benefits, high positioning accuracy

Active Publication Date: 2019-05-31
NO 1 CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its interior is equipped with a nearly 1000m water delivery corridor with a depth of 2.5m-3.0m. The water delivery corridor divides the indoor site into irregular multiple small sites, which is not suitable for large hoisting equipment to walk and carry heavy loads at the same time. It will also cause damage to the structure of the water delivery corridor, therefore, the method of hoisting outside the site must be considered

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] An off-site hoisting construction method of a super-large-span string truss comprising the following steps:

[0043] (1) Precisely blank and process the upper chord, lower chord, and web of the tension truss through the structural form-finding method, and send it to the construction site outside the construction site;

[0044] (2) According to the span of the string truss to be constructed, the truss sections are assembled in sections on the tooling tire frame in a horizontal manner, and the adjacent truss sections are assembled into a complete single truss through connecting plates and bolts; then Install sliding shoes at the bottom of the supports at both ends of each truss;

[0045] (3) According to the length and span of the string truss to be constructed, two parallel rows of concrete columns are first poured on the construction site, and the sliding beam is installed in the gap between the two concrete columns so that the sliding beam and the concrete column Equal ...

Embodiment 2

[0060] The structural plane size of the Port Channel Sediment Engineering and Transportation Industry Key Laboratory of Estuary and Coastal Deep Water Channel Test Hall is 121.6m×201.2m. m, mid-span spacing is 12m, the steel roof is composed of 18 horizontal string beam trusses and 9 longitudinal connection secondary trusses, and all trusses and roof supports are composed of steel pipe members.

[0061] The specific off-site hoisting construction method is as follows:

[0062] (1) Precisely blank and process the upper chord, lower chord, and web of the tension truss through the structural form-finding method, and send it to the construction site outside the construction site;

[0063] (2) According to the span of the string truss to be constructed, 9 truss sections are assembled on the tooling frame in a horizontal manner, and the adjacent truss sections are assembled into a complete single truss through connecting plates and bolts Truss; then install sliding shoes at the bot...

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Abstract

The invention discloses an extra-large-span truss string off-site hoisting construction method. The method comprises the steps that accurate blanking and machining are carried out, and single trusses are spliced; a sliding track is laid, and a supporting jig frame and a temporary supporting frame are built; a track hoist is used for hoisting the first truss to the temporary supporting frame and hoisting the second truss to the supporting jig frame, and the second truss and the first truss are connected into a rigid whole; an in-situ synchronous symmetrical graded tensioning method is adopted for detecting that tension slow coordinated deformation achieves the self-balance system deformation of a truss string; the temporary supporting frame is detached after an auxiliary truss is installed; the first truss and the second truss are integrally moved forwards by one unit through a hydraulic crawl device; in the same way, all the following trusses are installed one by one in an accumulated sliding mode; and finally unloading is carried out. Splicing is carried out outside a building site and does not affect other professional synchronous construction; hoisting and sliding construction is adopted, the number of the supporting jig frames and large hoisting machines is reduced, and economic benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to an off-site hoisting construction method of a super-large-span string tension truss. Background technique [0002] In the existing large-span space structure, the theoretical research and construction technology of tension string structure have been developed. The string tension truss adopts a semi-rigid structure composed of upper chord rigid truss, lower chord flexible cables and struts. The structure is self-balanced through prestressed cable stretching, making full use of the excellent properties of various materials. In the field of large-span and ultra-large-span structures, It has a good prospect of use. [0003] With the progress of society, the space structure is booming, the building span is getting bigger and bigger, the structure is getting more and more complex, and the technical requirements for installation and construction are getting higher and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G21/14
CPCE04G21/14
Inventor 肖畅
Owner NO 1 CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU CO LTD
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