基于GIS平台的太原南部区域地壳稳定性评价

Evaluation of crustal stability in southern Taiyuan based on GIS platform

为了开展山西太原南部(清徐县、榆次区、太谷县)地区的区域地壳稳定性评价工作,在野外调查和广泛收集资料的基础上,分析了控制和影响区域地壳稳定性的影响因素和特征,选取了地震峰值加速度、地震活动性、断裂的活动性、地块特征、重力布格异常、地热流、工程岩土组、地质灾害、构造地貌等10个评价指标,并对指标进行了分类赋值。基于GIS平台,采用多因素加权叠加分析方法,通过构造稳定性评价和地表稳定性评价,建立了区域地壳稳定性评价模型和定量化评价,将研究区划分为次稳定区、次不稳定区和不稳定区3个等级。介绍了各等级地质特征、防治措施、利用措施,对今后的城市规划及工程建设具有重要指导意义。

In order to carry out the evaluation of regional crustal stability in the south of Taiyuan in Shanxi Province(Qingxu county,Yuci district and Taigu county),based on the field investigation and extensive data collection,the influencing factors and characteristics of controlling and influencing regional crustal stability are analyzed.Ten evaluation indexes(seismic peak acceleration,seismic activity,fault activity,block characteristics,gravity Bouguer anomaly,geothermal flow,engineering geotechnical group,geological disaster,structural landform),are selected and classified.On the basis of GIS platform,the regional crustal stability evaluation model and quantitative evaluation are established by using the multi factor weighted superposition analysis method,through the evaluation of structural stability and surface stability.The study area is divided into three grades:sub stable area,sub unstable area and unstable area.This paper introduces the geological characteristics,prevention and control measures and utilization measures of each grade,which is of great guiding significance for urban planning and engineering construction in the future.