Hoisting method for long-span asymmetrical rectangular spatial twisted pipe truss

A technology of space distortion and hoisting method, which is applied in the processing of building materials, construction, building construction, etc., can solve the problems of laborious, high-altitude installation safety hazards, time-consuming and other problems, and achieve shortened construction period, reduced construction cost, and simple installation work Effect

Active Publication Date: 2013-03-06
MCC TIANGONG GROUP
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Problems solved by technology

[0003] For the hoisting of large-span asymmetrical rectangular space twisted pipe trusses, due to the irregularity of its structure and shape, one crane often cannot meet its installa

Method used

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  • Hoisting method for long-span asymmetrical rectangular spatial twisted pipe truss
  • Hoisting method for long-span asymmetrical rectangular spatial twisted pipe truss
  • Hoisting method for long-span asymmetrical rectangular spatial twisted pipe truss

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Embodiment Construction

[0020] A hoisting method for a large-span asymmetrical rectangular space-distorted pipe truss is completed according to the following steps:

[0021] ① Establish the space solid model of the hoisting section of the space twisted truss, such as figure 1 shown;

[0022] ② Find out the position of the space center of gravity in the twisted state in the truss construction drawing, such as figure 2 , 3 shown;

[0023] ③ Use the center of gravity and a certain point on the vertical line 1 of the horizontal plane as the center to draw a straight line to the upper chord of the truss to ensure that the angle between the straight line and the vertical line is controlled between 30 and 60 degrees, such as Figure 4 , 5 shown;

[0024] ④According to the determined lifting point position, analyze each binding point of the truss, that is, the maximum value of the force state of each point during the lifting process of the truss lifting point, so as to determine the type and length of ...

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Abstract

The invention relates to a hoisting method for a long-span asymmetrical rectangular spatial twisted pipe truss. The hoisting method comprises the following steps of: 1) building a spatial solid model of spatial twisted truss hoisting sections; 2) finding out the position of a spatial gravity center under a twisted condition in a truss construction drawing; 3) drawing straight lines towards truss top chord binding points by taking the gravity center and certain points on a horizontal plane perpendicular as centers, wherein included angles between the straight lines and the perpendicular are guaranteed to be 30-60 degrees; 4) analyzing maximum stress of truss binding points during lifting according to the positions of determined lifting points, so as to determine the specifications and the length of steel wire ropes at the truss lifting points; 5) using hand chain hoists with the same specification for two lifting points with minimum stress; and 6) lifting the truss from an assembling state to an installation state, conducting three-dimensional measurement and conducting fine tuning in cooperation with the hand chain hoists. The hoisting method for the long-span asymmetrical rectangular spatial twisted pipe truss has the advantages that the asymmetrical rectangular spatial twisted pipe truss can be installed in place in one step during high-altitude installation, the entire installation work is simple and practical, the construction period can be greatly shortened and the construction cost is reduced.

Description

Technical field: [0001] The invention belongs to the installation technology of a steel structure building, in particular to a hoisting method of a large-span asymmetric rectangular space twisted pipe truss. Background technique: [0002] With the development of social economy and construction technology, designers are using their imagination more and more in stadium buildings, making many conceptual things that could not be realized before become reality, such as the National Stadium (Bird's Nest), Beijing Phoenix International Media Center and other buildings. This type of building gives full play to the designer's rich imagination, organically combining plane, space, regular and irregular, forming a perfect visual effect of the building. But at the same time, such buildings also bring great challenges to the structural installation. [0003] For the hoisting of large-span asymmetrical rectangular space twisted pipe trusses, due to the irregularity of its structure and s...

Claims

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Application Information

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IPC IPC(8): E04G21/14
Inventor 张伟兰小龙
Owner MCC TIANGONG GROUP
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