郑州市地下空间开发利用潜力评价

Potential Assessment of the Development and Utilization of Underground Space in Zhengzhou

基于GIS平台,从构造地质条件、工程地质条件、水文地质条件、环境地质条件4个方面,对郑州市地下空间开发利用潜力进行了评价。在此过程中,建立了郑州市地下空间开发利用潜力评价指标体系,确定的二级评价指标分别为:断裂分布状况、地震活动性、地层组合条件、岩土体条件、不稳定斜坡、潜水埋深、潜水含水层富水性、第一层承压含水层顶板埋深、崩滑流发育状况、地面塌陷和地裂缝、地面沉降、地下水侵蚀性;然后通过层次分析法来确定模型中各影响因素的权重值。评估结果将郑州市地下空间开发利用潜力分为4个等级:高、较高、中等、较低。该结果能够较为准确地反映区域地质环境开发利用潜力状况,具有实际的应用价值,可以为政府部门的管理和决策提供信息支持。

The potential of development and utilization of the underground space in Zhengzhou was evaluated from the aspects of the structural geological,engineering geological,hydrogeological,and environmental geological conditions based on the GIS tool.An index system of the potential of development and utilization of the underground space in Zhengzhou was established,and the secondary evaluation indexes included the distribution of fracture,seismic activity,strata formation,geotechnical conditions,unsteady slope,depth of water table,water yield of the unconfined aquifer,depth to the top of the first confined aquifer,developmental conditions of landslide,surface collapse and ground fissure,land subsidence,and corrodibility of groundwater.The AHP（Analytic Hierarchy Process） method was used to determine the weight of each factor.The assessment results showed that the potential of development and utilization of the underground space in Zhengzhou can be divided into four levels,i.e.,very high,high,medium,and low.The results can reflect the status of the potential of development and utilization of the regional geological environment accurately,which has practical application values to provide the information support for the management and decision making of the government.