四川红层区软基工程地质特性分析  

Analysis on Engineering Properties of Red Layer Soft Foundation in Sichuan Province

作　　者：王东[1] 王运生[1] 孙刚[1] 谢春庆[2] 

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

出　　处：《南水北调与水利科技》2011年第5期115-119,共5页South-to-North Water Transfers and Water Science & Technology

摘　　要：四川红层区软基是一种特殊的土类,具有独特的工程地质特性。本文以四川某红层机场为例,利用钻孔资料、相关实验数据,及线性回归方法,系统地分析了四川红层软基的物理力学性质及相互间的线性关系,并结合另外两处川内红层机场,与沿海地区软土进行对比。结果表明:四川红层软基厚度较小、横向变化大;含水率、孔隙比与沿海地区软土相比偏小而抗剪强度则偏高;压缩性中等,灵敏度低;塑性指数与液限以及含水率与孔隙比、液限、压缩系数均存在较好的线性关系,同时含水率对黏聚力、内摩擦角也存在显著影响。Red layer soft foundation is a special soil type, having unique geological features in Sichuan province. This paper took the red layer of an airport in Sichuan province as an example, using drilling data, experimental data and linear regression methods, analyzed systematically the physical and mechanical properties of the Sichuan red layer soft foundation and their linear relationship, and compared with soft soil in coastal areas, combined with two other red layer airports in Sichuan. The results showed that, the thickness of Sichuan red layer soft foundation is smaller while the lateral variation of it is larger. Compared with the soft soil in coastal areas,its water content and void ratio is smaller but shear strength is higher,and it has a medium compression with a low sensitivity. A good linear relationship exists between plasticity index, liquid limit, and water content with void ratio, liquid limit and compressibility. Its water content significantly affected the cohesion and internal friction angle.

关 键 词：红层区软基 发育特征 工程地质特性 四川 

分 类 号：TU471.8[建筑科学—结构工程]