Application of analogy method in the study of triaxial compressive test on frozen soil at low temperatures

The technology and key problems of analogy method applied in the triaxial compressive test study of frozen soil are presented. Based on the theorem of Bockingham π which is widely applied at present, using the dimensional analysis method, and considering the relation of frozen soil's constitutive equation, water content and density, the analogical variables relations are studied and analogy relationships of shear strength indexes are obtained. Therefore, the analogical value of shear strength indexes at different test conditions can be deduced from a test result. Test results also validates that the deduced analogy relations of frozen soil shear strength indexes have good precision and can be adopted in frozen engineering and other relative study field. For the low temperature test with shortcomings of higher energy consuming, the longer time occupied, the higher money cost and the more difficulty to control test conditions, the study results presented here can reduce the same tests and have significance in practice.