Construction Safety Risk Assessment of Subway Station Foundation Pit Excavation Based on CRITICAL-TOPSIS Method:Taking Kaiyuan Road Station of Jinan Metro Line 9 as an Example
The foundation pit of subway station usually becomes the key link in subway station construction because of its large scale,close to the structure and high demand for deformation control.It is of vital significance to evaluate the excavation of subway station foundation pit scientifically and effectively,optimize and guide the construction method and technology,and reduce the risk of subway station construction.An objective weight weighting method CRITIC(criteria importance through intercrieria correlation)is introduced,Combined with the method TOPSIS(technique for order preference by similarity to an ldeal solution),the evaluation is carried out based on the foundation pit project of subway station under construction.The analysis results show that the surrounding environment and insufficient support have become the main risk sources for the excavation of subway station foundation pit.For the narrow and long subway station foundation pit,the end well is more prone to danger.During the excavation of foundation pit,the monitoring and measurement should be strengthened,the construction parameters should be adjusted in time,and the construction method should be optimized.
risk assessmentfoundation pitCRITIC-TOPSIS(criteria importance through intercrieria correlation-technique for order preference by similarity to an ldeal solution)assessment method
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