摘要
在高围压条件下，对冻结兰州砂土在不同温度和不同应变速率下进行三轴压缩试验。试验结果表明，围压的增大和应变速率的减小明显增强了冻土的塑性性能；同时，随围压的增大，冻土的抗剪强度增加，但随围压的进一步增加，它出现降低的趋势，存在一个临界围压，此临界围压值随温度的变化而变化。
Under high confining pressure, triaxial compressive tests on frozen Lanzhou sandy soil are performed at different temperatures and strain rates. It is revealed that plasticity is strengthened obviously with the increase of confining pressure or decrease of strain rate. The shear strength of frozen sandy soil increases with increase of confining pressure, but decreases gradually with further increase of confining pressure. There exists a critical confining pressure, which changes with temperature but does not change with strain rate. The shear strength of frozen sandy soil increases with decrease of temperature or increase of strain rate.
出处
《冰川冻土》
CSCD
北大核心
1996年第3期268-272,共5页
Journal of Glaciology and Geocryology
基金
国家自然科学基金
关键词
高围压
冻土
强度
冻结砂土
high confining pressure, frozen soil, strength
