As　an　example　of　the　first　phase　project　of　Chengdu　Subway　Line　2,　use　three-dimensional　numerical　simulation　of　groundwater　flow　to　simulate　the　situation　of　ground　water　table　obstruct,　Simulation　includes　two　cases　of　only　consider　Line　2　and　both　consider　Line　I,　2.　Through　the　analysis　that　Chengdu　Subway　Line　2　project　of　ground　water　table　obstruct　in　0.035　similar　to　0.298m,　Will　be　affected　some　low-rise　or　middle-rise　buildings　safe　and　the　normal　use　of　the　basement　or　underground　car　park　which　relatively　poor　water　resistance.