Comparison of modulus equations of frozen soil based on spherical template indenter: Fid-Bau Portal

Comparison of modulus equations of frozen soil based on spherical template indenter

Huang, Can-Jie / Zhang, Ze / Jin, Hui-Jun / Li, Xin-Yu / Chen, Xin / Feng, Wen-Jie

Abstract In order to provide reliable modulus estimating equation, based on Spherical template indenter test and linear elastic theory, it obtained two different modulus formulations, called as strict solution and modified solution relatively. Following then, a general equation group was provided to illustrate the reason causing the difference of those two solutions. Using the testing data of frozen samples, the simulation was built to examine those two solutions with result that modified solution was better consistent with simulation and experimental data. Simulation results indicated that the frictionless hypothesis used for analysis was approximately correct within specific contacting area. By comparison with other experiment results, it found that the modified solution gave more safety value while the strict solution overestimated the compression modulus of frozen soil. Therefore, the modified solution is a feasible and reliable function applied for determining compression modulus of frozen soil.

Highlights • Two compression modulus equations are deduced according to elastic theory and spherical template indenter test. • A function group is given to show difference of two compression modulus equations and higher accurate calculation of modulus. • Some simulation is made to comparing which compression modulus equation is better. • Traditional test results of modulus are compared with that given by modulus equations to find the better modulus equation.