9WANG J X, HU L S, WU L G, et al. Hydraulic barrier function of the underground continuous concrete wall in the pit of subway station and its optimization[J]. Environmental Geology, 2009, 57(2): 447 - 453.
10Shearer T R, A numerical model to calculate land subsidence, applied at Hangu in China [ J ]. Engineering Geology, 1998, 49(2) : 85 -93