尉氏县城区地下空间利用地质环境适宜性评价

Evaluation of Geological Environment Suitability for Underground Space Utilization in Weishi County

为了科学合理地开发利用城市地下空间资源,以尉氏县为例,分析影响冲积平原型城市地下空间利用的地质环境因素,以地形地貌、工程地质、水文地质为准则层,结合层次分析法确定权重,建立评价模型,并借助GIS技术,对研究区不同深度地下空间资源利用的地质环境适宜性进行评价.结果表明:研究区内影响地下空间利用的地质环境因素主要有地貌类型、土质均匀性、主持力层厚度、地下水埋深、地下水腐蚀性、含水层富水性.尉氏县中心城区浅层地下空间资源利用地质环境适宜性较差区占22.55%,中层适宜性较差区占12.18%.在适宜性较差区建设地下工程时,应采取有针对性的工程措施.通过评价尉氏县城地下空间资源利用的地质环境适宜性,可为冲积平原型城市地下空间资源利用提供地学支撑.

For scientifically and reasonably exploiting and utilizing the urban underground space(UUS)resources,taking Weishi County as an example,this paper analyzed the geological environment factors that could influence the utilization of alluvial plain-type urban underground space. Selecting topography,engineering geology and hydrogeology as the criterion layer,the evaluation model was established by combining the analytic hierarchy process(AHP)to determine the weights. With the aid of GIS technology,the geological environment suitability for utilization of underground space resources at different depths in the study area was evaluated. The results showed that the main geological environmental factors affecting the development and utilization of underground space in the study area are geomorphic type,soil uniformity,thickness of main bearing layer,groundwater depth,groundwater corrosivity,and aquifer rich water. In the central urban area of Weishi County,the area with poor geological environment suitability for shallow underground space resources accounted for 22.55%,and the area with poor suitability for middle layer accounted for 12.18%. Targeted engineering measures should be taken when underground projects are constructed in areas with poor geological environment suitability. By evaluating the suitability of geological environment for the utilization of underground space resources in Weishi County,it can provide geological support for the utilization of underground space resources in alluvial plain cities.