杭州地铁秋涛路车站深基坑地表沉降监测分析

Monitoring analysis of ground settlement of deep foundation pit at Qiutao Road Station of Hangzhou metro

基坑开挖对周边环境的影响越来越受到人们的重视,施工过程中如何保证基坑周围土层的稳定,减小对周围环境的影响,已成为关注的新焦点。杭州地铁秋涛路车站在施工过程中布设了4条测线监测坑外地表沉降,通过对监测数据的总结分析,探讨了基坑土体开挖过程中开挖进度、支撑架设对地表沉降的影响,标准段南侧出现的渗漏对基坑近处土体位移的影响,存在地面超载时基坑周围不同距离处地表沉降变化趋势。通过对上述问题的分析总结,为杭州地铁后续工程的设计和施工提供了一定的资料参考,同时也为今后软土地区基坑的设计和施工提供了可借鉴的经验。

More and more attention to the influence excavation of deep foundation pits on the surrounding environment has been paid.How to guarantee the stability of soil layers and to reduce the effect of surrounding environment during excavation has become a new focus.Therefore,four measuring lines were set to monitor the ground settlement around the excavation of Qiutao Road Station of Hangzhou metro.Through the summary and analysis of the monitoring data,the fllowing aspects were discussed:the effect of excavation and supporting on ground settlement was discussed;the effect of leakage southern foundation pit on ground settlement;the change trend of ground settlement at different places outside the foundation pit when the ground overload existed.The above analysis can provide reference for the design and construction of subsequent projects of Hangzhou metro.Meanwhile it also provide the preferable experience for the design and construction of excavation in soft soil areas in future.