采用侧封、底封隔渗体防渗的深基坑土方施工，当隔渗体存在漏水隐患，由于漏水通道沟通了基坑内与隔渗体外承压水的水力联系，在坑内外压力水头差的作用下，承压水会通过隔渗体漏水处涌人基坑内，并对其上上体产生集中渗透力作用。隔渗体漏水造成深基坑工程的主要危害如下... The construction of deep excavation earthwork with side and bottom seal seepage impermeability, when the seepage body has hidden water leakage, because the leakage passage communicates the hydraulic connection between the inside of the foundation pit and the confined water inside the diaphragm, the head pressure difference between inside and outside the pit is poor. Under the effect of pressure, the confined water will seep into the foundation pit through the leaking part of the insulator, and it will have a concentrated penetrating effect on the upper body. The major hazards of the deep foundation pit project caused by leakage of the seepage body are as follows...