城市岩溶地质调查及评价方法探讨——以浙江杭州市为例

A tentative discussion on methods for urban karst geological survey and evaluation:a case study of Hangzhou City in Zhejiang Province

中国城市地质调查中的岩溶地质调查及评价方法处于探索阶段,目前尚缺技术规范与工作指南。笔者基于杭州城市的岩溶地质特征和杭州经济社会对岩溶地质调查的需求,以基本查明城区岩溶地质特征、岩溶塌陷重点区的稳定性评价为目标,采用充分利用前人资料、补充调查、重点解剖的工作思路,地质、物探及钻探、模糊层次分析评价相结合的工作方法,较大地提高了本区岩溶地质特征、岩溶塌陷预测的研究程度。并在开展调查及评价实践的同时,对工作方法进行了积极探索与初步研究。

Karst geological survey and evaluation methods for urban geological survey remain in the exploring stage in China, and there exist no available technical codes and guidelines. On the basis of Hangzhou urban karst geological characteristics and the demands of Hangzhou economic society for karst geological survey, the authors tried to find urban karst geological characteristics and evaluate the stability of the key karst subsidence blocks. Data from previous work were fully used, supplementary investigation and dissection of key points were made, and the combination of geology, geophysical exploration, drilling and fuzzy layers analysis were implemented. These measures have greatly promoted the research level of karst geological characteristics and the forecast of karst subsidence in this area. The working methods are also actively studied in this paper.