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Deep foundation pit safety assessment method based on utility theory and D-S evidence reasoning

A technology of evidence reasoning and deep foundation pits, applied in data processing applications, instruments, predictions, etc., can solve problems such as difficulty in realizing deep foundation pit safety assessment, inability to provide support for deep foundation pit project intelligent management and long-term risk methods, and achieve Achieve qualitative and quantitative analysis, improve forecasting ability, and improve the effect of accuracy

Active Publication Date: 2019-09-27
NANJING SHENDI INTELLIGENT CONSTR TECH RES INST CO LTD
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AI Technical Summary

Problems solved by technology

The above-mentioned safety assessment methods have certain subjectivity, uncertainty and lag, and it is difficult to achieve timely and effective safety assessment of deep foundation pits, and cannot provide support for intelligent management and long-term risk methods of deep foundation pit projects

Method used

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  • Deep foundation pit safety assessment method based on utility theory and D-S evidence reasoning
  • Deep foundation pit safety assessment method based on utility theory and D-S evidence reasoning
  • Deep foundation pit safety assessment method based on utility theory and D-S evidence reasoning

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Embodiment Construction

[0101] Below in conjunction with embodiment and description the present invention will be further described.

[0102] A method for evaluating the safety of deep foundation pits based on utility theory and D-S evidence reasoning of the present invention is characterized in that the method comprises the following steps:

[0103]Step 1: Use the nonlinear prediction model of the future state based on the third-order Volterra series to predict the future state of the deep foundation pit through historical and current data.

[0104] Among them, the method for predicting the future state of deep foundation pits includes the following steps:

[0105] Step 1.1: The historical data and current observations of deep foundation pit safety indicators are used as model input, as shown in the following formula:

[0106] Z(k)=[z(k), z(k-1),..., z(k-T+1)] T

[0107] Among them, z(k) represents the collection value of the evaluation index at time k, and T represents the length of the time ser...

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Abstract

The invention discloses a deep foundation pit safety assessment method based on utility theory and D-S evidence reasoning. The method depends on deep foundation pit project detection data, predicts the future state of a deep foundation pit based on the third-order Volterra series, and improves the prediction capability of a scheme on project potential risks. The fusion weight of the evaluation index is determined by adopting the variation coefficient and the information entropy, the representation effect of the index variation amplitude and the contained information amount on safety evaluation is considered, and the evaluation accuracy is improved; utilization of utility theories and D S evidence reasoning is used for safety assessment, and qualitative and quantitative analysis of project safety is achieved. According to the method, the finite length unit impulse response filter is used for simplifying the prediction model, model coefficients are reduced, and the state prediction speed is increased. According to the method, a complex evaluation model does not need to be established, a large amount of project risk data is not needed for model training, good scheme realizability and evaluation accuracy are achieved, intervention of too many expert personnel is not needed, and effective use and popularization of the scheme in the later period are facilitated.

Description

technical field [0001] The invention relates to the technical field of safety assessment of deep foundation pit projects, in particular to a deep foundation pit safety assessment method based on utility theory and D-S evidence reasoning. Background technique [0002] During the construction and later use of deep foundation pits, safety factors are complex and changeable. Timely and effective safety assessments and effective countermeasures are of great significance to effectively reduce the safety risks of deep foundation pits. Due to the complexity and differences of deep foundation pits, currently commonly used deep foundation pit project safety assessment methods are mostly based on expert experience or on-site investigation methods to achieve qualitative analysis, combined with some quantitative analysis methods to make a rough safety assessment classification, Or set a certain safety alarm threshold for some important indicators to avoid serious accidents. The above-me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06
CPCG06Q10/04G06Q10/0635G06Q10/06393
Inventor 黄永明章国宝杨雪琪
Owner NANJING SHENDI INTELLIGENT CONSTR TECH RES INST CO LTD
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