宁波轨道交通换乘车站基坑施工风险控制

Foundation Pit Construction Risk Control on Ningbo Rail Transit Interchange Station

宁波轨交甬江北站是2号线与3号线的换乘站。分析了换乘站的工程地质及复杂基坑施工中围护结构、基坑降水、开挖、支撑施工中存在的风险;在对周边环境调查的基础上,制订了施工风险控制对策,采用合理的围护结构及地基加固,运用时空效应原理进行基坑开挖;信息化施工及时调整施工参数,控制围护结构位移在安全合理范围内,确保工程保质、保量、按期、安全完成。

North Yongjiang Station is an interchange station of Ningbo Rail Transit L2 and L3.Both the complex engineering geology and the risks in the construction process of foundation pit retaining structure,dewatering,excavation, supporting are analyzed in the article.On the basis of the surrounding environment investigation,some construction risk control measures are developed, which include reasonable retaining structure, foundation reinforcement,and principle of time and space.Besides,information construction technology is used to adjust parameters and to control the displacement value within reasonable limits.All the measures mentioned above ensure the project quality,quantity,schedule and safety.