When dewatering in deep foundation pit

the uncertainty of the leakage point location

size

and so on in the rock-socketed underground diaphragm in deep foundation pit cause the numerical simulation and prediction of the groundwater flow field very difficult to handle. Based on the analysis of the sealing effect of the rock-socketed underground diaphragm in Xunlimen station of Wuhan subway line No. 2

a method of longitudinal translation and put together is used to deal with the leak point in diaphragm while numerical simulation calculating. The results through 3D numerical simulation by this method are very close to the results obtained from actual measurement

it shows the possibility of using the method to deal with the problems of simulation and prediction of change process of the groundwater flow field in the case of dewatering in the rock-socketed underground diaphragm while it exists leakage point; it provides an approach to solve the problem. In the meantime

the actual sealing effect of the rock-socketed underground diaphragm is analyzed and discussed. The analytical procedure discussed for the project instance can be used for reference to the similar engineerings.