Study On Safety Risk Of Group Buildings Crossed By Shield Tunnel

ABSTRACT:In connection with the practice of the shield tunnel crossing group buildings in Suzhou Metro2, the risk of the shield tunnel crossing group buildings was researched, and risk research contents were put forward. The risk identification and the risk classification of the shield tunnel crossing group buildings were key points.There were four parts in the risk research of shield tunnel crossing group buildings:the influence of shield advancing on ground settlement; information of shield tunnels and group buildings; the risk identification and the risk classification and the risk control. A kind of risk classification of shield tunnel crossing group buildings is presented based on eight risk identification subjects which are horizontal distance, depth of tunnel, shape of tunnel, intersection angle, type of infrastructure, type of upper structure, years of building and use type of building. The aim of risk classification is to control the risk. The risk control measures of the shield tunnel crossing group buildings were discussed in shield machine equipment, monitoring and controlling deformation of ground and buildings and shield tunnelling construction.