The Study Of Ground Fissures In The Southern Of Jiangyin

Since the reform and opening up,industry in the towns of jiangyin relys on its good regional advantages,GDP rapidly grows year by year.As the reform becomes further,the economic in the southern of Jiangyin development also faster and faster,as well as comprehensive economic strength.However,with the change of natural environment and the effect of human activities,geological disaster in the regional of Suzhou Wuxi and Changzhou have become increasingly prominent,especially in the south of Jiangyin,excessive exploit of groundwater is very serious,the groundwater level continues to decline,causing a series of geological environment problems,such as the problems of the ground subsidence,ground fissures and so on,which have become a threat to the people's life and property safety,as well as causing a great economic losses to the water conservancy project,transportation infrastructure,urban construction and agricultural productionAccording to investigation in the field and the collected data(including regional hydrogeology conditions,topography,rocks,geological structure,and the distribution of cracks,the material of the borehole data,and ground subsidence,)this paper will do some analysis about the cracking mechanism and the geological environment background of the ground-fissure.In addition,this paper will use the method of grey degree of association evaluation combining with gis to make comments on the risk of the ground-fissure in the area of Yangshuli village,and make reasonable division to the dangerous zone,by making use of the results of other researchers,the monitoring data of crack,hydrogeology material,.Make full use of the current monitoring data of land subsidence in calendar year and the material of ground fissures to do a reasonable forecast of the trend of the development of the fissures in the south of Jiangyin.From the result of evaluation,the dangerous zone of ground fissure disaster is mainly distributed in the waved bedrock surface,the shallow of groundwater region,the serious of underground water level,and region with the serious mutations of the thickness of aquifer and lithological characters.In these areas,the rise and fall of the bedrock surface lead to the different changes of the quaternary sedimentary structure.Because of the effect ofthe excessive exploit of groundwater and the level of the underground water,the aquifer and overlying viscous soil layer engender the water pressure release,which lead to the uneven settlement,so cracks disaster occurred in the formation ofthe most concentrated stress.