A deep foundation pit construction scheme safety review knowledge base and automatic safety review method

Abstract

The invention discloses a safety review knowledge base and automatic safety review method for a deep foundation pit construction scheme. The knowledge base comprises a project construction method information sub-base, a safety risk event sub-base, a risk causing factor sub-base, a basic event review rule sub-base, a coupling relationship sub-base and a risk grade evaluation rule sub-base. The knowledge base scientifically and orderly stores and manages all related knowledge needed by safety review on the deep foundation pit construction scheme, therefore, uncertainty caused by current manual review in safety review work is eliminated, and a review result which is stable in quality and has time-spatial information is obtained within a short time so as to support on-site safety management. The safety review knowledge base and automatic safety review method for the deep foundation pit construction scheme can be used for managing safety review knowledge of the deep foundation pit construction scheme to achieve automatic safety review, therefore, the practical difficulty existing in safety review of the construction scheme in the construction preparatory period at present is overcome, the quality and efficiency of safety review work of the deep foundation pit construction scheme are improved, and better decision support is provided for safety management of the construction period in the future.

Description

technical field [0001] The invention belongs to the field of engineering risk identification, and in particular relates to a deep foundation pit construction scheme safety review knowledge base and a safety review method thereof. Background technique [0002] Deep foundation pit engineering has high safety risks, and safety accidents occur from time to time. my country has formulated a strict and meticulous management system for deep foundation pit projects. According to the regulations in the "Safety Management Measures for Sub-item Projects with Greater Risks" (Jianzhi [2009] No. 87), before construction of deep foundation pit projects, Its construction plan must pass the safety review of the expert committee, and if the review fails, the construction cannot start. The safety review of deep foundation pit construction scheme is an important part of deep foundation pit construction safety management, and it is also the starting point of the entire deep foundation pit constr...

AI Technical Summary

Problems solved by technology

More importantly, the safety risk assessment knowledge of deep foundation pit engineering construction has not yet been expressed in a unified and standardized way, which leads to many different angles and methods for the assessment of safety risks, and also affects the quality and stability of the current assessment work.

It is difficult for the experts participating in the review to fully grasp the information of this order of magnitude, so the review results are not completely accurate. In addition, such a large amount of information processing in the risk analysis process also makes the review work consume a lot of time and low efficiency

[0011] To sum up, manual review has difficulties of poor accuracy and low work efficiency

[0012] (2) Lack of an effective mechanism to share and update the safety review knowledge of deep foundation pit engineering construction plans

[0013] Relevant knowledge is scattered in a large amount of various documents, technical materials and experts' minds, and because it is difficult to fully grasp the huge amount of safety review knowledge manually, and the experts participating in the review have their own areas of expertise in deep foundation pit construction safety, It is rare for an expert to have all the knowledge

This knowledge is the accumulation of long-term engineering practice. At present, there is no mature mechanism to organize this knowledge in a standardized manner. This makes it difficult to share the safety review knowledge of deep foundation pit engineering construction plans, which is detrimental to the safety management of deep foundation pit engineering construction. influences

[0014] In addition, as the construction technology of deep foundation pit engineering is constantly being updated and improved, new safety risks and new risk-causing factors will also appear, which makes the safety review knowledge also continuously updated, which also increases the safety risk from the other hand. The Difficulty of Reviewing Knowledge Sharing

[0015] (3) The information provided by the manual review results is not complete, the form is single, and it is difficult for all staff to understand and grasp

[0024] (2) Pay less attention to how to effectively manage relevant safety risk assessment knowledge, making it difficult to share relevant knowledge

[0025] (3) The identification and evaluation of risks lacks a systematic perspective, that is, the risks are evaluated individually, and the mutual influence between risks is less considered

[0026] (4) Evaluation methods are mostly comprehensive evaluations in theory, and it is difficult to evaluate multiple risks with loop characteristics

[0027] (5) There are many studies on evaluation methods, but few studies on how to manage related knowledge

The specific situation of each safety risk event is different, and these associations are quite complicated. It is difficult to reflect the intricate relationship between risk events and risk factors only by assigning a fixed reliability to the value of the risk factor and then calculating the evaluation value with the aggregation function. too in line with engineering principles

[0031] (2) Separate evaluation of security risk events without considering the coupling effect between risk events

For example, the deformation of the enclosure structure will increase the degree of settlement of the surrounding surface, and the increase in the degree of settlement of the surrounding surface will also increase the lateral pressure on the enclosure structure, further aggravating the deformation of the enclosure structure

There are still many such engineering and technical relationships in the construction of deep foundation pit engineering, but this patented technology does not consider the coupling effect between safety risk events, which does not conform to the principles of engineering technology

At present, there are few studies on the safety risk assessment of deep foundation pit engineering construction involving such a relationship.

[0032] (3) The comprehensive evaluation model cannot deal with the risk system with loop characteristics

If the relationship between risk events is considered and a risk system with circuit characteristics is established, the commonly used analysis methods represented by artificial neural network, event number and fault tree are difficult to play a role in this case

[0033] To sum up, there have been many research results and application cases for the identification and evaluation of safety risks in deep foundation pit engineering construction, but the research and specific technical solutions for the scientific management of the huge amount of deep foundation pit construction scheme safety review knowledge have not yet been seen. to report

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