A cumulative slip construction method for space grid truss structures

Abstract

The invention discloses a construction method for accumulative sliding of a truss structure of a space grid. Firstly an assembling platform is arranged in a side span, an assembling support is arranged on the corresponding position of a side seven-truss column mesh, computational analysis is conducted according to sliding conditions, and a counter-pull support and a top-lifting support are arranged on the corresponding position of a second span column mesh; a seven-truss transverse truss and a fourteen-truss longitudinal truss are assembled on the assembling platform, through the arrangement of a horizontal continuous jack and a hydraulic control system at the front end of a slide, the trusses are dragged to achieve unitary sliding, and a span is moved forward when each sliding is conducted; linear is adjusted through the top-lifting support and the counter-pull support, the next span truss is continuously assembled on the assembling support, until all the truss structures are in position trough sliding, after an integral structure is in position through sliding, and a four-upright top-lifting support is arranged under the middle of the vertical and the horizontal directions; and a middle truss is top-lifted, the linear is adjusted, and system transformation is conducted. According to the construction method for accumulative sliding of the truss structure of the space grid, the installation construction of a large-span bi-directional forced structure is achieved on the condition that full supporting frames are not built, the difficult problems that safety risk of a traditional high-altitude scattering assembled method is big, and the measure cost is high are solved.

Description

Technical field: [0001] The invention belongs to the technical field of building construction, and mainly relates to a construction method for accumulative sliding of a space grid truss structure, and is particularly suitable for the installation and construction of the vertical and horizontal truss structure system of large-span venues. Background technique: [0002] Space grid truss structure, as a structural form of long-span space structure, is a two-way force-bearing structural system, which is applied to large and medium-sized stadiums. At present, the construction method of the space grid truss structure mostly adopts the high-altitude loose splicing method. [0003] For a large-span gymnasium roof space grid truss structure with the following specifications, its plane size is 86.63m×77.91m, the maximum height of the lower chord of the truss is 19.5m, the span spacing is 8.7m, and the total weight of the truss structure including roof purlins is 604t. The main struct...

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Problems solved by technology

[0004] The purpose of the present invention is to make up for the defects of the prior art, to provide a construction method of accumulative slippage of a space grid truss structure, to realize the installation and construction of a large-span two-way force-bearing structure without erecting a full hall support frame, and to solve the problem of traditional high-altitude loose construction. Legal security risks are high and the cost of measures is high

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