Performance evaluation method and system for pile-anchor type support of foundation pit in overdue service

A foundation pit and pile-anchor technology, which is applied in the field of pile-anchor support performance evaluation for overdue foundation pits, can solve problems such as complex environments and threats to the safety of construction personnel and mechanical equipment in foundation pits, and achieve accurate performance evaluation

Active Publication Date: 2022-04-29
CHINA RAILWAY URBAN CONSTR GRP
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Problems solved by technology

[0005] The present invention provides a method and system for evaluating the performance of overdue foundation pit pile-anchor support in consideration of timeliness. Technical issues concerning the safety of construction personnel and machinery and equipment

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  • Performance evaluation method and system for pile-anchor type support of foundation pit in overdue service
  • Performance evaluation method and system for pile-anchor type support of foundation pit in overdue service
  • Performance evaluation method and system for pile-anchor type support of foundation pit in overdue service

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Embodiment Construction

[0089] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0090] Such as Figure 1 to Figure 6 As shown, the first embodiment of the present invention proposes a method for evaluating the performance of pile-anchor support for overdue foundation pits, which includes the following steps:

[0091] Step S100 , according to the triaxial test of the rock and soil and the construction project, determine the rheological characteristics of the soil on the project site, the strength reduction of the reinforced concrete of the supporting structure, and the loss of the prestress of the anchor cable.

[0092] Further, step S100 includes:

[0093] Step S110, obtain the rheological properties of the engineering site soil through the triaxial compression test of the rock and soil, and the relationship between the coh...

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Abstract

The invention discloses a method and system for evaluating the performance of a pile-anchor type support of an overdue service foundation pit, and the method comprises the steps: determining the rheological characteristics of a soil body on an engineering site, the strength reduction of reinforced concrete of a support structure and the loss of the prestress of an anchor cable according to a triaxial test and construction engineering of a rock-soil body; determining expressions of soil pressure and anchor cable prestress changing along with time according to rheological characteristics of a soil body on an engineering site, reinforced concrete strength reduction of a supporting structure and anchor cable prestress loss; determining a deformation coordination relationship between a pile body and an anchor rod in combination with basic assumption of a foundation pit pile-anchor support model; meanwhile, the rheological property of a soil body and the anchor cable prestress loss are considered, the basic theory of an elastic foundation beam is combined, and the evaluation value of the pile-anchor supporting performance of the foundation pit in overdue service considering the aging is deduced. The performance of the temporary foundation pit supporting structure can be evaluated comprehensively, objectively and accurately, and a basis is provided for safe construction of temporary foundation pit engineering.

Description

technical field [0001] The invention relates to the technical field of performance evaluation of foundation pit pile-anchor support, and in particular discloses a method and system for evaluating the performance of foundation pit pile-anchor support for overdue service in consideration of timeliness. Background technique [0002] The rapid development of the national economy, the relative scarcity of land resources, and the accelerated utilization of underground space have produced a large number of foundation pit projects, and the foundation pit projects are also constantly moving towards large areas and large depths in order to meet the needs of various development and use functions. Therefore, in order to meet the construction safety, higher and higher requirements are put forward for the performance of the foundation pit support structure, and the safety of the support structure is becoming more and more important. The pile-anchor foundation pit support structure mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N3/08E02D33/00
CPCG01N3/00G01N3/08E02D33/00G01N2203/0003G01N2203/0019G01N2203/0218G01N2203/0246G01N2203/0256G01N2203/0676G01N2203/0682
Inventor 张鑫全门彬肖金明马彦征曾乐李东东关劼兮余俊陈伟彬邓鹏兵杨鑫歆张志中
Owner CHINA RAILWAY URBAN CONSTR GRP
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