Hazard Zoning Of Xi’an Line Project About Ground Fissure And Land Subsidence

The area of Xi’an is located in the Weihe River Basin，central of GuanzhongPlain, the geological environment is complex, geological structure is active in thiszone, geological disasters occur frequently, affect the social stability seriously.This dissertation is conducted on the basis of combination of Xi’an fifth subwayline project progress, first of all, the geo-environmental back ground, thecharacteristics and formation mechanisms of the ground fissures and landsubsidence in the study area of Xi’an fifth subway line were analyzed and evaluationfactors were selected, Formulate the hazard grading standards of ground fissure andland subsidence. And then Present situation and prediction risk zoning of groundfissure sand land subsidence were assessed. Finally, the assessment of ground fissurezones integrated ground subsidence hazard zoning, due to more factors of groundfissure sand land subsidence, in order to make more reasonable comprehensivezoning, this article uses Analytic Hierarchy Process, carry the risk aboutcomprehensive zoning of ground fissures and land subsidence on the fifth subwayline assessment district based on Arc GIS software. Make comprehensive hazardzoning map about ground surface and land subsidence of assessment district aboutfifth subway line according to the results of regionalization. Further, carry on riskdivisions through Arc GIS software, obtained divisions map of ground fissure andland subsidence about Xi’an fifth subway line，risk divisions map.