Academic Journal of Engineering and Technology Science, 2024, 7(2); doi: 10.25236/AJETS.2024.070214.
Zhao Zhihao1, Wang Haitao1, Wang Meng1, Zhang Zhiwei2
1School of Civil Engineering, Dalian Jiaotong University, Liaoning, Dalian, 116028, China
2China Railway No.14 Group Corporation Tunnel Engineering Co. Ltd, Jinan, Shandong, 250002, China
The construction of three-dimensional underground transportation systems has made the expansion of existing lines increasingly common. However, there has been limited practical engineering research on new stations closely adjoining existing ones. Such projects are characterized by their uniqueness, complexity, and high risk. Establishing a risk assessment system for construction close to existing structures can aid in risk control for similar projects. This paper, based on the actual project at Wudaokou Station on Beijing Metro Line 13, evaluates the risks during the excavation stage of a foundation pit close to existing structures. It thoroughly analyzes the factors affecting the safety of foundation pit excavation construction adjacent to existing structures. Based on this analysis, a risk assessment system for foundation pit excavation construction close to existing structures is established. The Analytic Hierarchy Process (AHP) is used to determine the weights of the risk factors at different levels. Furthermore, based on fuzzy mathematics theory, a risk assessment model for foundation pit excavation construction close to existing structures is constructed. The model calculates and scores each factor, concluding that the accident possibility level for foundation pit excavation construction close to existing structures is Level 3, indicating a high-risk project. The assessment results are reliable, consistent with practical engineering, and can serve as a reference for similar projects.
Deep foundation pit excavation, risk assessment, Analytic Hierarchy Process (AHP), Fuzzy comprehensive evaluation method
Zhao Zhihao, Wang Haitao, Wang Meng, Zhang Zhiwei. Safety Risk Assessment of Deep Foundation Pit Excavation Adjacent to Existing Railway Stations. Academic Journal of Engineering and Technology Science (2024) Vol. 7, Issue 2: 88-95. https://doi.org/10.25236/AJETS.2024.070214.
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