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Construction method of large-span overhead steel-structure truss

A technology of steel structure and steel truss, applied in the field of construction method of large-span aerial steel structure truss, can solve the problems of heavy hoisting weight, inconvenient construction, large hoisting radius, etc., so as to improve work efficiency, save construction cost, and speed up construction progress. Effect

Active Publication Date: 2016-12-07
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the installation and construction of steel structure trusses, it is usually completed by hoisting by construction cranes or single-piece assembly by the bracket method. However, for high hoisting heights, heavy hoisting weights, and large hoisting radius, only large-tonnage cranes can be used, which leads to high project costs. It has a great impact on the control of construction cost, especially for the narrow construction site, it cannot be hoisted by crane; when the bracket method is used for construction, the strength of the top surface cannot meet the requirements, and the higher the installation height, the more complicated the construction; First, it will seriously affect the control of on-site construction period, cost and construction safety, and bring great inconvenience to the construction

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  • Construction method of large-span overhead steel-structure truss

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Comparison scheme
Effect test

Embodiment 1

[0043] A construction method of a large-span aerial steel structure truss in this embodiment, such as figure 1 As shown, it is mainly realized through the following technical solutions, including the following steps:

[0044] Step 1: Preparatory work before construction;

[0045] Step 2: Hoist the pre-embedded steel columns and pre-embedded steel beams of each section;

[0046] Step 3: Installation of hoisting equipment:

[0047] Step 31: Install the two winches on the topmost floors of the two main buildings;

[0048] Step 32: Use the corbels of the topmost steel beam protruding from the building as the support point during hoisting, and place the supporting truss on the corbels for welding and fixing;

[0049] Step 33: Weld and fix the cantilever truss on the supporting frame, and hang the cable on the embedded steel column in the floor;

[0050] Step 34: Weld and fix the lifting truss on the cantilever truss;

[0051] Step 35: Fix the pulley block on the lifting truss;...

Embodiment 2

[0061]This embodiment is further optimized on the basis of the above embodiments. Further, a construction method of a large-span aerial steel structure truss, the first step specifically includes the following steps:

[0062] Step 11: Transport the small structural parts manufactured in sections to the assembly platform on the construction site, conduct inspection and acceptance according to the specification requirements, and assemble the small structural parts into a single-piece truss after passing the test; the assembly platform is set in the middle of the floor where the steel truss needs to be installed On the floor; the assembled platform is installed on the platform pier on the main beam; the platform pier is arranged on the main beam every 3 to 5 meters; the upper surface of the platform pier is on the same horizontal elevation;

[0063] Step 12: Transport the assembled single-piece steel truss to the bottom of the lifting point through the sliding track, and the slidi...

Embodiment 3

[0068] This embodiment is further optimized on the basis of the above embodiments. Further, a construction method of a large-span aerial steel structure truss includes the following steps:

[0069] Step 1: Preparatory work before construction;

[0070] Step 11: Transport the small structural parts manufactured in sections to the assembly platform on the construction site, conduct inspection and acceptance according to the specification requirements, and assemble the small structural parts into a single-piece truss after passing the test; the assembly platform is set in the middle of the floor where the steel truss needs to be installed On the floor; the assembled platform is installed on the platform pier on the main beam; the platform pier is arranged on the main beam every 3-5 meters; the upper surface of the platform pier is on the same level;

[0071] Step 12: Transport the assembled single-piece steel truss to the bottom of the lifting point through the sliding track, and...

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Abstract

The invention discloses a construction method of a large-span overhead steel-structure truss. The construction method comprises the first step of preparation before construction, the second step of hoisting of embedded steel column bones and embedded steel beams of all sections; the third step of mounting of hoisting equipment; and the fourth step of field hoisting of the steel-structure truss. Compared with the prior art, by the adoption of the construction method, provided by the invention, of the large-span overhead steel-structure truss, the problem that in the hoisting process of the steel-structure truss, the construction period, the construction cost and the safety are seriously affected due to the facts that the hoisting work face is small, the mounting height is excessively high, the hoisting weight is too large, and the hoisting radius is excessively large can be solved,

Description

technical field [0001] The invention relates to the technical field of steel structure truss construction, in particular to a construction method of a large-span aerial steel structure truss. Background technique [0002] During the installation and construction of steel structure trusses, it is usually completed by hoisting by construction cranes or single-piece assembly by bracket method. However, for high hoisting height, heavy hoisting weight, and large hoisting radius, only large-tonnage cranes can be used, so the project cost is high. It has a great impact on the control of construction costs, especially for the narrow construction site, it cannot be hoisted by crane; when the bracket method is used for construction, the strength of the top surface cannot meet the requirements, and the higher the installation height, the more complicated the construction; Firstly, it seriously affects the control of on-site construction period, cost and construction safety, and brings ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/14
CPCE04G21/14
Inventor 梁朋刚苏春生何十美汤振亚
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP OF THE FIFTH ENG
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