温度对非饱和膨胀土抗剪强度和变形特性的影响  

Research of thermal effects on shear strength and deformation characteristics of unsaturated bentonite soils

作　　者：谢云[1] 陈正汉[1] 李刚[1] 

机构地区：[1]后勤工程学院,重庆400016

出　　处：《岩土工程学报》2005年第9期1082-1085,共4页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(10372115)

摘　　要：共进行了4组12个控制温度、净围压和基质吸力的膨胀土三轴排水剪切试验,分析了温度对重塑非饱和膨胀土抗剪强度和变形特性的影响。试验结果表明,随温度的升高,非饱和土的抗剪强度增加,初始切线杨氏模量增大。根据试验结果建立了考虑温度影响的非饱和土抗剪强度公式和切线杨氏模量公式。A series of temperature-controlled triaxial experiments were conducted. The study of thermal effects on the mechanical behaviour of reconstituted unsaturated bentonite clay was presented. Governing temperatures were 15℃, 30℃, 45℃ and 60℃. Thermal effects on shear strength and Young＇s tangent modulus were discussed. The research results showed that specimens with higher temperatures showed higher shear strengths and Young＇s tangent modulus. The formulas of shear strength and Young＇s tangent modulus taking account of temperature were proposed.

关 键 词：非饱和膨胀土 三轴试验 温度影响 抗剪强度 切线杨氏模量 

分 类 号：TU43[建筑科学—岩土工程]