【摘要】 本文以正在新建的武汉地铁四号线一期地铁换乘站——岳家嘴站深基坑降水工程为实例,结合该工程的实际特点:复杂的基坑结构围护设计、工程地质、水文地质和周边环境等,详细介绍了武昌临长江和沙湖地区承压水位较高、地层渗透系数大等工程地质与水文地质特性。然后针对该工程的实际特点进行了详细的基坑降水计算与设计,制定了该基坑工程的降水方案,评估了基坑降水对周边环境的影响,并对降水井的构造、施工工艺流程以及运行时的保障措施进行了简要介绍。最后,通过对施工降水运行期间的各种监测点的合理布置以及监测数据的采集、整理与分析,对整个基坑的降水效果与基坑安全风险进行了全面分析,实证了该基坑施工降水方案的可行性,希望能对类似大型工程基坑降水施工提供参考。更多还原

【Abstract】 This paper illustrates the geological characteristics near Yangtze River and Sand Lake area in Wuchang with the dewatering technology of deep foundation pit at the Yuejiazui Tansfer Station on the newly built Metro Line 4 in Wuhan.The geological characteristics contain high confined water level and large permeability coefficient.The project features include complex foundation pit enclosure structure design,engineering geology,hydrogeology and surrounding environment.The detailed calculations and design of dewatering concerning the aforementioned features are carried out and a dewatering plan is made based on the assessment of the dewatering influence on the surrounding environment.The structure of dewatering well,construction method and preventive measures are also introduced.Finally,the pit dewatering effect and induced safety risk are analyzed based on the monitoring data that collected from appropriate monitoring network.This paper demonstrates the feasibility of the dewatering plan and provides a reference for the pit dewatering design and construction to similar Large-scale projects.更多还原