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High-stiffness monolithic prestress assembly type foundation pit bracing inner-supporting system

A foundation pit support and support system technology, which is applied in infrastructure engineering, excavation, construction, etc., can solve the problems of low rigidity of buttresses or corner braces, and achieve small deformation of foundation pits, high overall stability, and predictable prestress tune effect

Inactive Publication Date: 2013-04-03
SHANGHAI STRONG FOUND ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a high-rigidity integral prestressed assembled internal support system for foundation pit support by overcoming the shortcomings of the purlins, buttresses or corner braces of the supporting structure in the existing foundation pit support.

Method used

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  • High-stiffness monolithic prestress assembly type foundation pit bracing inner-supporting system
  • High-stiffness monolithic prestress assembly type foundation pit bracing inner-supporting system
  • High-stiffness monolithic prestress assembly type foundation pit bracing inner-supporting system

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Embodiment Construction

[0020] 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.

[0021] see figure 1 , the support structure in this embodiment is mainly composed of four parts: steel purlin 1, corner brace or counter brace 2, prestress loading device 3, steel purlin and corner brace or counter brace connection integral connection key 4, etc. .

[0022] see figure 2 , Steel purlin structure, including a lower chord beam 11, steel strand 12, web bar 13,, special anchorage 14 components.

[0023] The web bar 13 is arranged on the string beam 11, the two ends of the steel strand 12 are connected to the two ends of the lower string beam 11, and the middle part of the steel strand 12 is supported by the web bar 13 in a fish-belly or arc shape. Assemble the section steel and steel strands into a purlin with a fish-belly struct...

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Abstract

The invention provides a high-stiffness monolithic prestress assembly type foundation pit bracing inner-supporting system, which comprises an opposite brace, an angle brace and a prestress enclosing purlin, wherein the opposite brace can apply prestress to the outer side of a foundation pit along an axis of the foundation pit; the prestress enclosing purlin is connected with the angle brace and the opposite brace into a whole, and the stressing axes are on the same plane; and finally, the high-stiffness monolithic prestress assembly type foundation pit bracing inner-supporting system is formed. The system has the advantages of high stiffness, large span, controllable deformation, convenience in construction and the like, and materials can be recycled.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a high-rigidity overall prestressed assembled foundation pit support internal support system. Background technique [0002] In deep foundation pit engineering in soft soil, reinforced concrete or steel pipe supports the support structure. In order to reduce the deformation of the foundation pit and increase the stability, the commonly used methods are: increase the section size of the reinforced concrete purlin, increase the number of steel supports, reduce small spacing etc. But this will greatly increase the amount of construction materials used. Since the steel support structure currently used mainly uses a single section steel or steel pipe as a support beam, there is no effective connection between each section steel or steel pipe, and it cannot work as a composite structure, so their support stiffness is relatively low. For For foundation pits with a span greate...

Claims

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Application Information

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IPC IPC(8): E02D17/02E02D17/04
Inventor 刘全林宋伟民赵元一陈伟宏
Owner SHANGHAI STRONG FOUND ENG
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