| Jilin City is an important transportation hub and a new industrial base in Jilin Province.In recent years,with the rapid development of economical construction,the scale of urban construction has been expanded,and the construction of infrastructure projects such as roads and railways has also developed rapidly.The development of mineral resources,deforestation and land reclamation have become increasingly serious,and geological disasters have occurred.Property poses a serious threat.so geological disaster investigation and research work is imminent.This paper relies on the Jilin Provincial Department of Land and Resources,Jilin Provincial Department of Finance Project "Jilin City Urban Geological Hazard Investigation and Division(1: 50000)project",first of Jilin City urban geological disasters conducted a comprehensive investigation to identify the city of Jilin City Geology Disaster distribution status,condition of pregnancy,development law and development trend.Through the comprehensive study of the degree of geological disasters and the degree of risk of zoning,and finally the geological disaster prevention and control of the partition and put forward the prevention and treatment recommendations.It provide basic scientific basis for the Jilin municipal government to develop geological disaster prevention planning and implementation of geological disaster warning project and have advantage to reduce the loss of disaster and protect the safety of people's lives.Conclusions are as follows:(1)Through the investigation,the general developmental characteristics of the geological disasters in urban area of Jilin City are:There are 3 types of geological disasters,geological collapse as main geological disasters,65,accounting for 91.55% of the total number of geological disasters;sub-ground subsidence geological disasters,there are 5,accounting for 7.04% of the total number of geological disasters;Crack geological hazard point 1,accounting for 1.41% of the total number of geological disasters.Unstable slope(geological hazard points)17.Among the conditions and influencing factors of geological disasters,the geological environment conditions change slowly,and the dual role of human engineering activities and heavy rainfall is the most active factor of causing geological disasters.(2)According to the geological disaster cause analysis method,the area is divided into three areas through the quantitative calculation of the division of elements in the prone area: high geological disaster prone area,middle prone area and low prone area,and then divided according to different distribution location,high geological disaster area is divided into five sub-district,the prone area is divided into 11 sub-regions.(3)The threat object elements be added to the division in the prone area,the study area will be divided into high-risk geological disasters,dangerous areas and low-risk areas.And then according to the difference of the location and the main content of the threat,it was divided into five high-riskareas of geological disasters,three geological disasters in the dangerous sub-area and a low geological hazard area.(4)According to the results of division in urban area which geological disasters prone to happen,taking into account the importance of socio-economic factors,the study area will be divided into key areas of geological disasters prevention and control,sub-key prevention and control areas and general control area.According to the location and prevention and control of the main content of the different,divided into five key geological disasters prevention and control sub-area,three geological disasters sub-key prevention and control areas and a geological disaster prevention and control area,and put forward the geological disaster prevention and treatment recommendations. |
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