广花盆地覆盖型岩溶发育等级划分探讨  

Discussion on Classification of Overburden Karst Development Grade in Guanghua Basin

作　　者：彭功勋 许韬 李承海 宋健 刘晓婷 PENG Gongxun;XU Tao;LI Chenghai;SONG Jian;LIU Xiaoting(Guangzhou Municipal Engineering Design&Research Institute,Guangzhou 510060,China)

机构地区：[1]广州市市政工程设计研究总院有限公司,广州510060

出　　处：《广东土木与建筑》2023年第3期17-20,29,共5页Guangdong Architecture Civil Engineering

摘　　要：鉴于当前国内几本岩溶技术标准在岩溶发育等级划分上的差异,文章在统计广花盆地灰岩区64个工程项目、4243个钻孔的岩溶发育数据基础上,探讨了广花盆地覆盖型岩溶区的岩溶发育等级划分标准。研究认为,广花盆地覆盖型岩溶的发育等级宜主要以线岩溶率为主要判别指标,以钻孔见洞隙率为次要判别指标;线岩溶率指标宜采用文献[10]的3%、10%界限值;广花盆地工程项目岩溶发育等级划分优先推荐采用文献[10]线岩溶率指标+文献[9]见洞隙率指标的综合方案(方案4),也可考虑采用文献[10]线岩溶率指标+文献[8]见洞隙率指标的综合方案(方案3)。In view of the difference of karst development grade in several domestic karst technical codes,based on the statistics of karst development data of 64 engineering projects and 4243 boreholes in the limestone area of Guanghua Basin,the classification standard of karst development grade in overlying karst area of Guanghua Basin is discussed.The study shows that the development grade of overlying karst in Guanghua Basin should be judged mainly by linear karst rate and be secondly judged by borehole porosity rate.The limit values of 3% and 10% of literature 10 should be used for linear karstification index.The classification of karst development grade of engineering project in Guanghua Basin is preferred to recommend the comprehensive scheme(scheme 4)of using the liner karst rate index of literature 10 and the borehole porosity rate index of literature 9,the comprehensive scheme(scheme 3)of using the liner karst rate index of literature 10 and the orehole porosity rate index of literature 8 is also acceptable.

关 键 词：覆盖型岩溶 岩溶发育等级 线岩溶率 见洞隙率 

分 类 号：TU42[建筑科学—岩土工程]