西南地区全-强风化红层砂岩工程特性试验研究  

Experimental Study on Engineering Properties of Fully-heavily Weathered Red Bed Sandstone in Southwest China

作　　者：廖崇高 谢春庆 潘凯 王健 王伟 

机构地区：[1]西部战区空军勘察设计院,成都610041

出　　处：《路基工程》2016年第6期117-124,共8页Subgrade Engineering

摘　　要：全-强风化红层砂岩作为工程地基或填筑体材料,由于其特殊的工程特性已造成了众多房屋倾斜、边坡失稳和填筑地基垮塌等工程事故。结合多个机场的大型工程建设,通过大量的室内试验及现场大型试验,系统地研究了西南地区全-强风化红层砂岩原岩和填筑体的工程特性。结果表明:原岩和填筑体均具有较高的地基承载力、变形模量和良好的抗剪性能,但均存在遇水后软化、崩解,物理力学性能急剧降低,对工程影响极大等问题,并针对性地提出了处理措施和建议。Fully-heavily weathered red bed sandstone is inevitably taken as the material for engineering foundation or fill body, however, due to its special engineering property, it has caused many engineering accidents, such as building inclination, slope failure and fill foundation collapse. Combined with the large- scale engineering construction in several airports, the engineering property of fully-heavily weathered red bed sandstone original rock and fill body . in southwest China, was studied systematically through large amount of laboratory and field tests. The result shows that both the original rock and fill body have high bearing capacity of foundation, deformation modulus and good shearing performance, but will be softened and disintegrated when wet, and have dramatically decrease of physical and mechanical properties, influencing the engineering to a great extent. At last, the countermeasures and suggestions were put forward herein.

关 键 词：红层砂岩 全-强风化 工程特性 崩解 填筑地基 毛细水 

分 类 号：TU45[建筑科学—岩土工程]