盐卡泵站工程主泵房深基坑开挖实践

Deep Foundation Pit Excavation of the Main Pump House of Yanka Pump Station Project

基于盐卡泵站工程主泵房开挖基坑深且地质条件复杂等特点,提出了基坑土方开挖采用分三层、阶梯状、全断面的施工方案。方案对工程地质条件、基坑边坡稳定性、渗透变形进行了分析;对基坑降水、排水、支护、开挖、监测、应急预案等进行了阐述。实践表明:方案应用效果达到设计要求,满足了泵站工程的施工需要。

Based on the characteristics of deep foundation pit and complex geological conditions for the main pump house of Yanka Pumping Station,a three-storey,step-shaped,full-section construction scheme was proposed for the earthwork excavation of the foundation pit.In the scheme the engineering geological condition,the stability of the foundation pit slope and the seepage deformation were analyzed.The dewatering,drainage,support,excavation,monitoring and emergency plan of foundation pit were described.The practice showed that the application effect of the scheme reached the design requirements and met the construction needs of the pumping station project.