Multi-point pushing cumulative-gliding construction method for steel roof truss

Abstract

The invention provides a multipoint incremental launching accumulative sliding construction method for steel roof truss. First, a slide support system of three chutes and six rails is set up; a high altitude assembly platform is set up beside the main structure; and a temporary support jig of the middle chute is set up along the midline of the main structure, using the concrete trough beam as the side chute. Then steel truss components are assembled on the ground, and are hoisted to the high altitude assembly platform to assemble a first sliding unit, and then the first sliding unit is connected with a hydraulic synchronous multipoint incremental launching mechanism; the hydraulic synchronous multipoint incremental launching mechanism consists of eight hydraulic crawl devices, three hydraulic pump stations and a synchronous incremental launching control system; after the first sliding unit is pushed, a second sliding unit is assembled and connected with the first sliding unit, and then a second time sliding is performed. Via such an assembly structure, the sliding movement is performed for n times, and then the backout bracket is unloaded, the high altitude assembly platform and the temporary support jig of the middle chute are dismounted. The invention solves the difficulty of safe and stable installation and emplacement in synchronous sliding of the steel roof truss, and at the same time reduces the engineering cost and shortens the construction period without affecting the construction of other structures.

Description

(1) Technical field [0001] The invention relates to a sliding construction method of a large steel structure roof truss system. (2) Background technology [0002] The Wukesong Cultural and Sports Center Gymnasium is the basketball venue for the Beijing 2008 Olympic Games, with a construction area of ​​63,429m 2 , can accommodate 18,000 spectators. The roof truss of Wukesong Gymnasium is a spatial truss system composed of two-way orthogonal fishbelly trusses. The axis dimension of the gymnasium is 120m×120m square, the span of the steel truss is 120m, and the spacing is 12m. There are 26 7 types of steel trusses, the height of the end is 6.3m, and the height of the middle is 6.3m~9.3m, and the lower chords are not at the same elevation; Box-shaped or H-shaped, the maximum plate thickness is 50mm, and the weight of the components is relatively large. The heaviest single-truss truss reaches 165t. Such a steel roof truss with a large span and the bottom chord is not at the s...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a multi-point jacking cumulative slip construction method for steel roof trusses, to solve the problems of large-span two-way fish-belly steel truss structure roof system cumulative synchronous and smooth slip, safe and stable installation in place, and also to solve The sliding problem of the lower chord of the truss is not at the same elevation; at the same time, it solves the problems of reducing engineering costs, shortening the construction period, and not affecting the construction of civil structures

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