岩土工程学报2017，Vol.39Issue(z1)：236-240,5.DOI:10.11779/CJGE2017S1047
粗粒土三轴试样端部约束影响研究
Effects of end restraint in triaxial tests on coarse-grained soil
摘要
Abstract
The end restraint can be eliminated by lubrication sample cap to some extent in the conventional triaxial tests. A comparison is made between the conventional triaxial tests and the end friction reduced triaxial tests in order to study the effects of the end restraint on the test results. The results show that different degrees of dilatancy is shown during the tests. The degree of volume deformation of the conventional triaxial test specimen is smaller. The measures to reduce the end friction have marked effects on the peak strength 13 f ( )σ σ? under low confining pressure. But with the increase of the confining pressure the effects of the lubrication sample cap method to reduce the end friction become worse. Under the same confining pressure, the internal friction angle ? , the initial Young's modulus Ei and the secant modulus E1 of the end friction reduced triaxial tests are smaller than those of the conventional triaxial tests.关键词
粗粒土/三轴试验/端部约束/润滑试样帽Key words
coarse-grained soil/triaxial test/end restraint/lubrication sample cap分类
建筑与水利引用本文复制引用
陆晓平,孙明辉,陈浩锋,褚福永..粗粒土三轴试样端部约束影响研究[J].岩土工程学报,2017,39(z1):236-240,5.基金项目
浙江省自然科学基金项目(LY14E080004) （LY14E080004）
国家自然科学基金项目(51479052) （51479052）
江苏省六大人才高峰项目(JZ-011) （JZ-011）
