穿越软土盾构地铁车站基坑施工安全控制措施

摘要

以某软土地基地铁车站深基坑施工为例,研究了影响施工安全的降水方案、开挖方案和支撑设计方案,提出了纵坡防失稳应急措施、围护结构变形超标应急、流砂及管涌的应急处理、支撑失稳的应急措施、基坑大幅度变形应急措施等应急预案,确保了施工过程的有序进行。%Taking the deep foundation construction of the soft soil subway station as an example, the paper studies dewatering scheme, excavation scheme and bearing design scheme influencing construction security, and puts forward emergent longitudinal slope instability protection measures, emergent enclosure structure deformation, emergent treatment of fluid sand and piping, emergent measure of bearing instability, emergent scheme of large-span foundation deformation. As a result, it ensures orderly construction process.