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Super-large-span roof steel truss and high-altitude floor support-free construction method

A construction method and technology for steel trusses, which are applied in the directions of truss-type structures, house structure supports, house structure supports, etc., can solve the problems of complex construction measures, large amount of assembled brackets, and increased construction costs, so as to improve engineering construction efficiency and engineering. quality, solve the upper construction problems, and reduce the effect of installation difficulty

Pending Publication Date: 2021-11-26
CHINA CONSTR EIGHT ENG DIV CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-altitude sliding method is generally used for roof trusses during positive sequence construction, but the construction measures are complicated, the construction efficiency is low, and the safety risk is relatively large
When the roof truss is constructed in reverse order, the high-altitude assembly method or the overall installation method can be used. Due to the large number of truss members, the high position, and the rigid connection of the nodes, the high-altitude assembly method uses a large amount of assembly support, low construction efficiency, and many high-altitude operations; The installation method has high requirements on the site and high technical difficulty, and the rigid column structure must be adopted in the reverse sequence construction, and the construction cost will increase significantly

Method used

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  • Super-large-span roof steel truss and high-altitude floor support-free construction method
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  • Super-large-span roof steel truss and high-altitude floor support-free construction method

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Experimental program
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Embodiment 1

[0040] see Figure 1-6 , the present invention provides a super-long-span roof steel truss, including a roof structure and a floor slab 1, the roof structure is composed of a plurality of single trusses 3, the top of the floor slab 1 corresponds to the two ends and the middle of the single truss 3 The truss columns 2 are arranged at each place, the truss columns 2 are fixedly connected to the bottom of the single truss 3, the top of the floor plate 1 is paved with a temporary road 4, the bottom of the single truss 3 is provided with a detachable temporary support 5, two adjacent The single trusses 3 are fixedly connected by the secondary beams 6 to form a stable system, and the top between two adjacent single trusses 3 is laid with a profiled steel plate 7;

[0041]Temporary support 5, the temporary support 5 includes a positioning base 51 and a lattice column 52, the positioning base 51 is fixedly installed on the top of the floor plate 1 according to the design requirements,...

Embodiment 2

[0047] Such as Figure 7 As shown, a high-altitude floor unsupported construction method of a super-large-span roof steel truss includes the following steps:

[0048] Step S1, preparation before installation, interspersed with pre-embedded steel structure embedded parts in the superstructure civil engineering professional steel bar binding process, after the concrete pouring is completed and the curing strength meets the requirements, two 10-ton forklifts are hoisted to the floor slab with a 100-ton truck crane , Lay 2cm steel plates on the hoisting and walking routes to protect the waffle board from direct damage to the board surface;

[0049] Step S2, hoisting of the single truss 3. In step S2, the single truss 3 is arched 20mm as a whole during the installation process, and the secondary beam 6 between the truss unloading units is measured according to the actual measurement of the distance between two single trusses 3 When the height difference is less than 10mm, the inst...

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Abstract

The invention belongs to the technical field of building material preparation, and particularly provides a super-large-span roof steel truss which comprises a roof structure and a floor plate, wherein the roof structure is formed by combining a plurality of single trusses. High-altitude floor support-free construction of the ultra-large-span roof steel truss comprises the following steps: S1, conducting preparation before installation; conducting pre-embedding of steel structure embedded parts in the upper-layer structure civil engineering professional steel bar binding process; and after concrete pouring is completed and the maintenance strength meets the requirement, hoisting two 10-ton forklift trucks to a floor plate through a 100-ton truck crane; laying a 2cm steel plate on a floor plate to serve as a temporary road; and hoisting the two 25-ton truck-mounted cranes and the four 50-ton crawler cranes to the floor plate by combining the 200-ton truck-mounted cranes, wherein all hoisting equipment can conduct construction on an upper floor, so that the installation difficulty of the roof super-large-span truss is lowered, and the construction period is shortened.

Description

technical field [0001] The invention belongs to the technical field of building material preparation, and in particular relates to a super-long-span roof steel truss and an unsupported construction method for a high-altitude floor. Background technique [0002] The clean room of the electronic factory has a large space requirement, and the roof is generally designed in the form of a long-span steel truss. There are two methods of building structure: positive sequence construction and reverse sequence construction (first construct the roof structure, and then construct the internal floor structure). The high-altitude sliding method is generally used for roof trusses during positive sequence construction, but the construction measures are complicated, the construction efficiency is low, and the safety risk is relatively large. When the roof truss is constructed in reverse order, the high-altitude assembly method or the overall installation method can be used. Due to the large...

Claims

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Application Information

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IPC IPC(8): E04G21/14E04G21/16E04C3/11E04G25/02E04G1/15E04G5/10E04G5/14
CPCE04G21/14E04G21/16E04G21/162E04C3/11E04G25/02E04G1/15E04G5/10E04G5/14
Inventor 王耀龙李连文詹永芳张健健李浩肖瑶时红亮刘桂山
Owner CHINA CONSTR EIGHT ENG DIV CORP LTD