摘要
软土中开挖基坑施工难度大、支护造价高,一旦发生事故损失较严重。对于一层地下室的浅基坑,往往由于开挖深度较浅而被建设、设计、施工单位忽视,最后因不严格按图施工、管理不严谨而发生失稳和滑移事故。通过对浙北某上部软土下部圆砾(或硬可塑粉质黏土)地层浅基坑深层滑移事故的原因分析以及对抢险加固设计方案的介绍,为软土地层浅基坑支护设计、施工提供经验和教训。同时设计和施工单位应对施工过程可能出现的危大风险进行预判,制定相应的应对预案和设计措施。
Excavation of foundation pits in soft soil is more difficult,and the support cost is higher.Once an accident occurs,the loss will be more serious.For the foundation pit with only one basement,it is always ignored by the construction,design and building section due to the shallow excavation depth.In the end,instability and slipping accidents happen due to the construction not according to the plan and the lack of rigorous management.Through the analysis and reinforcement design case of the shallow foundation pit in the upper soft soil and the lower round gravel(or hard plastic silty clay)stratum in northern Zhejiang,it can provide experience and lessons for the design and construction of the shallow foundation pit support in the soft soil layer.What’s more,the design and construction unit should predict the dangerous risks that may occur during the construction process,and formulate corresponding response plans and design measures.
作者
王颖
李慧慧
许磊
熊晓亮
黄绯
WANG Ying;LI Huihui;XU Lei;XIONG Xiaoliang;HUANG Fei(Hangzhou Geotechnical Engineering&Surveying Research Institute Co.,Ltd.,Hangzhou 310012,China)
出处
《城市勘测》
2022年第4期205-208,共4页
Urban Geotechnical Investigation & Surveying
关键词
浅基坑
深厚软土
深层滑移
加固
shallow foundation pit
deep silt
deep sliding accident
emergency reinforcement