某大型工程场地碳酸盐岩覆盖层成因类型及分析  

Genetic Types and Analysis of Carbonatite Overburden Layer in a Large Project Site

作　　者：谢春庆[1] 李天华[1] 孙刚[2] 徐鸿彪[2] 

机构地区：[1]成都军区空军勘察设计院,成都市610041 [2]成都理工大学地质灾害与环境保护国家重点实验室,成都市610059

出　　处：《勘察科学技术》2011年第6期19-23,共5页Site Investigation Science and Technology

摘　　要：碳酸盐岩地区覆盖层一般为残坡积的红粘土、次生红粘土,而某大型工程场地碳酸盐岩覆盖层与红粘土、次生红粘土物理力学特性有较大的区别。通过地质测绘、钻探、探井、大型探坑、颗粒与结构分析、物源分析、水文地质条件分析、室内外试验,并结合区域地质与新构造分析,确认其为坡洪积和大面积土洞塌陷堆积,其成因类型对物理力学参数的选用和地基处理具有重要意义。The overburden layer of carbonatite area generally contain the residual slope red clay and the secondary red clay.However,the carbonatite overburden layers in a large project site are very different from the traditional red clay and secondary red clay on their physical mechanics properties.Through the geological surveying,drilling,exploratory well,large trialpit,granules and structure analysis,the provenance analysis,hydrogeological condition analysis,outdoor and indoor test,and in combination with regional geology and new tectonic analysis,it confirms that the overburden layers are a product of diluvial slope or a accumulation of a blanket collapse of soil cave.The genetic type has important significance for the selection of physical and mechanical parameters and ground treatment.

关 键 词：碳酸盐岩 覆盖层 坡洪积 土洞 塌陷 

分 类 号：TU195[建筑科学—建筑理论]