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在岩溶区存在着多种非可溶性岩石时,即为可溶性岩石与非可溶性岩石混合类地基(简称“可(非)岩溶地基”),是岩溶区最复杂的一种特殊地质现象。如何进行详细勘察,精心分析,推荐经济合理的桩基持力层及基础方案进行优化设计和顺利施工,是勘察最重要的环节。该文结合工程实例,深度剖析了杭州某可(非)岩溶地基桩基施工疑难问题的原因并相应提出了应对措施与防范建议和应注意的事项,旨在为解决问题时参考。
In the karst area there are a variety of non-soluble rocks, which is soluble rock and non-soluble rock mixed foundation (referred to as “kai (non) karst ground”), karst area is the most complex of a special geological phenomenon. How to conduct a detailed investigation, careful analysis, recommend an affordable pile foundation layer and the basic program for optimal design and smooth construction, survey is the most important part. Based on the engineering examples, this paper deeply analyzes the reasons for the difficult construction of pile foundation in a karst ground in Hangzhou and puts forward corresponding countermeasures, precautionary suggestions and matters needing attention, aiming to refer to solve the problems.