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Long-span pre-stress fish belly sill for foundation pit support and mounting method thereof

A foundation pit support and installation method technology, applied in excavation, foundation structure engineering, construction, etc., can solve the problems of small span, low rigidity of steel purlins, inconvenient connection, etc., and achieve large span, shortened construction period, and convenient construction Effect

Active Publication Date: 2012-12-26
上海新强劲工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the disadvantages of low rigidity, small span and inconvenient connection with opposite braces of the steel purlins of the support structure in the existing foundation pit support, and the use of prestressed fish-belly beams will be the direction of research and development

Method used

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  • Long-span pre-stress fish belly sill for foundation pit support and mounting method thereof
  • Long-span pre-stress fish belly sill for foundation pit support and mounting method thereof
  • Long-span pre-stress fish belly sill for foundation pit support and mounting method thereof

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Embodiment Construction

[0046] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0047] see image 3 , the long-span prestressed fish-belly girder structure, including a lower chord beam 1, steel strand 2, web bar 3, two support points 4 for purlins, and special anchorage 5.

[0048] Its lower string beam 1 is assembled from section steel materials; its steel strand 2 is composed of multiple high-strength and low-relaxation steel wires, and each steel strand is covered with a plastic tube and filled with grease for protection and isolation;

[0049] Its web bar 3 is assembled from section steel materials into a wooden or straight shape; its supporting point 4 is assembled from section steel materials into a triangle; its prestressed loading locking mechanism is composed of special anchors 5 .

[0050] The web bar 3 is arran...

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Abstract

The invention provides a long-span pre-stress fish belly sill. The long-span pre-stress fish belly sill is used for overcoming the defects of low rigidity, small span and insecure connection with opposite support of an encircling purlin of a supporting structure in the present foundation pit support. The encircling purlin has the advantages of high rigidity, long span, control deformation reliability, convenience in construction, reusability, and the like. The purposes of increasing the degree of safety of the foundation pit support, shortening the construction period and lowering the construction cost are achieved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to an inner support structure for foundation pit support, in particular to a support structure for material recovery and an installation method for the structure. Background technique [0002] In the foundation pit support structure, the purlins commonly used in the internal support structure mainly include reinforced concrete purlins and section steel purlins. In order to reduce the number of braces and angle braces in the supporting structure and increase the construction space of the foundation pit, it is necessary to increase the span of the purlins. For this reason, the reinforced concrete purlin is realized by increasing the section size, and the section steel purlin is realized by increasing the number of layers of the steel structure, but these methods will greatly increase the amount of supporting materials. As a result, various side truss structures have appeare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02
Inventor 刘全林陈伟宏宋伟民毕平均
Owner 上海新强劲工程技术有限公司
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