Ground fissures along Xi'an subway line 4:hazard analysis and countermeasures

Xi'an ground fissure is a regional geological disaster,which is growing 14 ground fissures.Xi'an subway line 4 will passing through 13 ground fissures,causing many tests in tunnel construction.The author selects ground fissures along Xi'an subway line 4 as the study object,then discusses the factors affected to tunnel projects and hazard characteristics,finally puts forward many countermeasure to hazards of ground fissures aiming at engineering characteristics.The results have important directive to study characteristics of ground fissures scientifically and control them.