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，但不随应变速率而变化 Under the conditions of high confining pressure, the triaxial compression tests of frozen Lanzhou sand at different temperatures and different strain rates were carried out. The experimental results show that the increase of confining pressure and strain rate obviously increase the plasticity of frozen soil. At the same time, with the increase of confining pressure, the shear strength of frozen soil increases, but with the further increase of confining pressure, it appears There is a tendency to reduce the critical confining pressure, which varies with temperature but not with strain rate