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Identification and evaluation of deep foundation pit construction risks based on Grey-DEMATEL-Fuzzy comprehensive
Hu Hao1, He Jian1, Liu Peiling1
1College of Civil Engineering, Chongqing University of Arts and Sciences, Chongqing, China.
Plos One
|August 27, 2024
Summary
Deep foundation pit construction faces frequent accidents due to complex risks. A new Grey-DEMATEL-Fuzzy method effectively evaluates these risks, identifying excessive lateral earth pressure as a key factor for safer deep foundation pit projects.
Area of Science:
- Civil Engineering
- Risk Management
- Geotechnical Engineering
Background:
- Deep and large-scale foundation pit construction is increasing, leading to more frequent accidents.
- Construction environments are complex, with high risks and interconnected risk factors.
Purpose of the Study:
- To develop a reliable risk evaluation model for deep foundation pit construction.
- To identify key accident-causing factors and assess overall risk levels.
Main Methods:
- Determined 23 main accident-causing factors based on six major risk accident types.
- Introduced the Grey-DEMATEL-Fuzzy comprehensive evaluation method for risk assessment.
- Calculated indicator weights using Grey-DEMATEL and evaluated risk levels with fuzzy comprehensive evaluation.
Main Results:
- Excessive lateral earth pressure on the pile wall was identified as the most prominent risk factor.
- The overall risk level for the studied deep foundation pit project was determined to be medium.
- The identified risks were found to be within a controllable range.
Conclusions:
- The Grey-DEMATEL-Fuzzy method provides reliable risk evaluation even with incomplete information.
- Findings support the formulation of targeted preventive measures for deep foundation pit projects.
- This approach enhances safety and controllability in complex construction environments.
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