粉砂土地区高敏感环境下基坑施工对邻近隧道影响研究

Study on the Influence of Foundation Pit Construction on Adjacent Tunnel in High Sensitive Environment in Silty Soil Area

文中结合杭州地区元福巷历史地段南片西湖大道11号地块工程实践,进行了某项目深基坑支护对邻近隧道的影响研究。项目周边地质环境复杂敏感,北侧为运营地铁隧道,为保障既有地铁隧道的安全运营,文中详细介绍了该项目基坑支护设计方案,并采取有限元方法对邻近隧道进行了预先研究。经与监测数据对比,模拟结果与实测数据接近,进一步证明了有限元模型的可靠性,最后根据分析结果提出合理化建议,相关结论可为粉砂土地区高敏感环境下基坑工程的设计和施工提供经验借鉴和实践指导。

Combined with the engineering practice of the block No.11 Xihu Avenue in the south of Yuanfu Lane historical section in Hangzhou area,the study on the effect of adjacent tunnel induced by deep foundation pit support is carried out.Due to the complex and sensitive surrounding environment of the project,the north side is the operation of the subway tunnel.In order to keep safety of the existing tunnel,the design scheme of foundation pit support of the project is introduced in detail,and the finite element method is adopted to carry on the preliminary study of the underground tunnel.By comparing with the monitoring data,the simulation results are close to the measured data,which further proves the reliability of the finite element model.Then the reasonable suggestions are put forward according to the analysis results,and the relevant conclusions can provide experience reference and practical guidance for the design and construction of foundation pit engineering in the highly sensitive environment of silty soil area.