三轴压缩试验中活塞摩阻和橡皮膜的影响  

INFLUENCE OF PISTON FRICTION AND RUBBER MEMBRANE IN TRIAXIAO TESTS

作　　者：方涤华[1] 夏怀祖 

机构地区：[1]河海大学

出　　处：《大坝观测与土工测试》1989年第5期27-32,36,共7页Dam Observation and Geotechnical Tests

摘　　要：本文利用原状块样通过三轴压缩试验和无侧限抗压强度试验检验了活塞摩阻和橡皮膜对软粘土强度特性的影响.活塞摩阻和橡皮膜的约束将增加试样的不排水强度和应力—应变曲线的初始刚度;在固结不排水剪试验中主要影响总应力强度线的截距,对倾角的影响不大.Triaxial compression tests and unconfined compression tests on the undisturbed samples are performed to examine the influence of piston friction and rubber membrane on the strength property of soft clay. The friction of piston and the confinement of rubber membrane increase the strength and the initial stiffness of stress-strain curves in undrained tests. In consolidated undrained tests, they mainly influence the intercept of the total stress strength line, but they do not have significant influence on its slope angle.

关 键 词：三轴压缩试验 活塞摩阻 橡皮膜 

分 类 号：TU411.5[建筑科学—岩土工程]