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Method for monitoring safety status of foundation pit

A safety state and safety state assessment technology, which is applied in the fields of foundation structure engineering, foundation structure testing, construction, etc. question

Active Publication Date: 2010-02-10
SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this safety state evaluation method can only evaluate the safety state of individual monitoring items, such as inclination deformation, support axial force or house settlement, and does not systematically evaluate the overall safety state of the entire foundation pit.
[0003] Since there is no quantitative method to evaluate the current safety state of the foundation pit, nor to predict the safety state of the next step based on the data, and ignore the processing of the data, it is difficult to determine the current danger level of the foundation pit and the degree of danger during the construction of the next working condition
This is the main shortcoming of the current foundation pit monitoring and safety assessment

Method used

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  • Method for monitoring safety status of foundation pit
  • Method for monitoring safety status of foundation pit
  • Method for monitoring safety status of foundation pit

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Embodiment Construction

[0013] The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:

[0014] attached figure 1 The middle is a monitoring section of the foundation pit, and the labels 1-4 represent the supporting axial force 1, column uplift 2, inclination deformation 3, and wall bending moment 4.

[0015] First introduce method principle of the present invention and implementation process below:

[0016] First determine the monitoring items of the foundation pit, and set monitoring points on the same section of the foundation pit; monitor the monitoring values ​​of each monitoring item when the foundation pit is constructed to the current working condition, such as supporting axial force T, column uplift Δ, inclination deformation x And the surface subsidence behind the wall, etc.

[0017] In order to achieve the...

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Abstract

The invention relates to underground engineering construction, in particular to a method for monitoring safety status of a foundation pit. Monitoring points which are capable of mutually corroboratingare arranged on a same section of the foundation pit in the invention method to monitor and obtain monitoring values of each monitoring project when the foundation pit is constructed to the current working condition; the safety status of the foundation pit at present can be quantitatively measured by comparing the monitored data with a limit status; deformation and force condition of foundation pit in next step is obtained through prediction; the safety status of the foundation pit in the next step of construction is evaluated by the way of comparing with the limit status, thus realizing theprediction the of safety status of the foundation pit and transforming the safety status evaluation of the foundation pit from post-evaluation to pre-evaluation. The invention has the advantages thatdynamic monitoring evaluation of the safety status of the foundation pit is realized by replacing absolute evaluation with relative evaluation and combing the data evaluation result obtained by monitoring with evaluation result obtained by adopting prediction; the quantitative monitoring evaluation of the safety status of the foundation pit is realized and the specific risk points are confirmed; the safety status of the foundation pit in the current and in the next step of construction is predicted systematically; the invention has great significance to the safety control over the constructionof the foundation pit.

Description

technical field [0001] The invention relates to underground engineering construction, in particular to a method for monitoring the safety state of foundation pits. Background technique [0002] The safety status monitoring of foundation pit engineering has not yet found a scientific and reasonable method. At present, during foundation pit monitoring, the alarm value is generally proposed based on design and construction experience. If the monitoring result of the foundation pit reaches the alarm value, it is considered that the foundation pit is in an unsafe state, and attention should be paid, or corresponding countermeasures should be taken. Generally, the set alarm value is low, and the monitoring value can easily reach the alarm value during actual construction, and most of the foundation pits have no safety problems. This situation causes the construction unit to lack analysis and judgment on the monitoring results, and it is easy to reach the alarm value, which makes ...

Claims

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Application Information

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IPC IPC(8): E02D33/00
Inventor 葛以衡王洪新李波陈立生叶可炯
Owner SHANGHAI URBAN CONSTRUCTION MUNICIPAL ENGINEERING (GROUP) CO LTD
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