地铁车站高渗透砂性地层深大基坑降水控制技术研究

Research on Dewatering Control Technology for Deep and Large Foundation Pits in High Permeability Sandy Strata of Subway Stations

文章结合地铁车站工程实例,剖析在高渗透砂性地层中开展深基坑施工的难点,提出了具体的应对措施,并重点探讨了承压含水层降水设计、成井施工工艺。经过科学的设计和规范的施工后,有效控制了承压水的水位,减小了水文条件对工程及周边环境的影响,地下水问题得到妥善的解决,有利于地铁车站建设工作的高效开展。

Combined with the engineering example of the subway station,this paper analyzes the difficulties to conduct deep foundation pit construction in high permeability sandy strata,puts forward specific countermeasures,and focuses on the dewatering design of confined aquifer and the well drilling construction technology.After scientific design and standardized construction,the water level of confined water is effectively controlled,the influence of hydrological conditions on the engineering and surrounding environment is reduced,and the groundwater problem is properly solved,which is conducive to the efficient development of subway station construction.