Analysis of the genetic mechanism of ground fractures along Xi’an metro line 2

The ground fractures along Xi’an metro line 2 include Xi’an ground fractures,Chang’an ground fractures and geotectonic ground fracture No.f0.Xi’an ground fractures,generally trending NE,move in the way that the southeast block subsides relatively.They all distribute on the upper block of Lintong-Chang’an fault belt.Chang’an ground fractures are moving weekly,lying in the way of buried.The basic information of ground fractures along Xi’an metro line 2 has been briefly introduced.The genetic mechanism of ground fracture has been analyzed based on the result of ground fractures investigation.The formation of Xi’an ground fractures is mainly caused by geotectonic movement,and the extraordinary movement is mainly resulted from uneven ground subsidence that caused by the excessive pumping of deep-seated confined groundwater.Chang’an ground fractures have two kinds of genetic mechanism,one is tectonic genesis and the othe is gravity genesis.