典型滨海平原城市地下空间地质适宜性评价

Evaluation of Geological Suitability of Underground Space in Typical Coastal Plain Cities

地下空间地质适宜性评价是城市地下空间资源开发利用的重要前提。滨海平原城市因其特定的城市类型,需建立特定的地质适宜性评价体系来指导地下空间地质适宜性评价。本文以我国典型滨海平原城市日照市为研究区,深入分析了影响地下空间开发的地质环境因素,提出了基于基础性地质和约束性地质条件的滨海平原城市地质适宜性评价指标体系,进一步采用经验分值法、熵权法和综合评价模型厘定了研究区浅层(0~15m)和次浅层(15~30m)地下空间地质适宜性分区。结果显示,评价指标中水位埋深、断裂带、地面沉降和海水入侵等对地下空间地质适宜性的影响较大。研究区浅层和次浅层地下空间地质适宜性以适宜和较适宜为主,约占研究区面积的90%,不适宜区域约占研究区面积的10%。

Geological suitability evaluation of underground space is a critical condition for the development and utilization of urban underground space resources.Because of the unique characteristics of coastal plain cities,a particular geological suitability assessment approach is required to guide the geological suitability evaluation of underground space.Using Rizhao City as the research site,this work thoroughly examined the geological environment factors influencing underground space development and proposed an evaluation index system of coastal plain urban geological suitability based on basic geology and constrained geological conditions.The empirical score technique,entropy weight method,and comprehensive assessment model were used to determine the geological suitability zoning of shallow(0~15 m)and sub-shallow(15~30 m)subterranean space in the research region.Results indicate that the geological suitability of underground space is significantly influenced by the depth of water table,fault zones,land subsidence,and seawater intrusion.About 90%of the study region belongs to shallow and sub-shallow subterranean spaces,which are mainly suitable and relatively suitable.Approximately 10%of the research area is comprised of the inappropriate area.