Deep excavation risk evaluation method based on network reasoning

A risk assessment and deep foundation pit technology, applied in excavation, infrastructure engineering, electrical digital data processing, etc., can solve problems such as inability to accumulate and reason case data, and inability to perform accurate and quantitative risk assessment

Inactive Publication Date: 2010-09-22
SHANGHAI JIANKE ENG CONSULTING
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Problems solved by technology

[0005] The purpose of the present invention is to solve some problems existing in the existing risk assessment methods, including the inability to conduct accurate and objective quantitative risk assessment, the inability to accum

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  • Deep excavation risk evaluation method based on network reasoning
  • Deep excavation risk evaluation method based on network reasoning
  • Deep excavation risk evaluation method based on network reasoning

Examples

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Example Embodiment

[0108] Example: A construction quality and safety accident investigation was conducted on 72 deep foundation pits that have been built and under construction in a rail transit in a certain area. The quotient of the number of occurrences and the total number of foundation pits was used as the natural probability of occurrence, and the number of occurrences of risk events at the same level was used The ratio of is normalized as the importance of the event to the upper-level risk event.

[0109] For a deep foundation pit of a newly opened project, such as the deep foundation pit project of Shengli Road Station of the third phase of rail transit line X in a certain area, the risk assessment is generally carried out before the start of construction. Before the construction, deep foundation pit engineering may occur The risk events and their corresponding risk levels are unknown. However, by investigating and analyzing the deep foundation pit projects that have been built and under con...

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Abstract

The invention discloses a deep excavation risk evaluation method based on network reasoning, in particular to a deep excavation engineering risk evaluation method based on a risk tree network for probabilistic reasoning, which comprises the following steps: establishing a deep excavation engineering risk evaluation and computation model according to risk identification and analysis; taking preliminary statistic deep excavation engineering quality safety accident data as basis for probabilistic computation and loss assessment, and adopting the risk tree network to conduct the linear reasoning of risk event occurrence probability and the dynamic update of the probability; adopting expert investigation and historical experience to conduct the assessment of losses caused by risks; and combining the established risk evaluation model to evaluate deep excavation risks to obtain the overall risk level of the deep excavation engineering and the average risk level of each risk event. The invention has the advantages that the method can be used for conducting deep excavation engineering construction risk evaluation and dynamic risk evaluation, the risk evaluation is enabled to more accurate and objective, the dynamic risks in the whole construction process can be reflected, the relevant prevention, control and reduction of the construction risks are facilitated and the safety is guaranteed.

Description

technical field [0001] The invention relates to a construction risk assessment method for deep foundation pit engineering of housing construction, rail transit, municipal facilities and the like, in particular to a deep foundation pit risk assessment method based on network reasoning. Background technique [0002] In recent years, foundation pit projects at home and abroad have shown a trend of "big, deep, tight, and close". The construction of deep foundation pit projects has the characteristics of large investment, long construction period, complex technology, many unforeseen risk factors, and great impact on the social environment. , is a high-risk construction project. Therefore, deep foundation pit accidents occur frequently, and cause huge economic losses and casualties. [0003] Only by evaluating the risk of deep foundation pit engineering more accurately through reasonable risk assessment methods can we control the risk of engineering construction in a targeted man...

Claims

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Application Information

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IPC IPC(8): E02D17/02G06F19/00
Inventor 周红波张辉蔡来炳高文杰姚浩
Owner SHANGHAI JIANKE ENG CONSULTING
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