冻土长期强度的衰减特征及屈服准则

申明德, 周志伟, 马巍

Long-term strength attenuation characteristics and yield criterion of frozen soil

Mingde SHEN, Zhiwei ZHOU, Wei MA

表6 不同松弛历时下的强度面拟合参数

Table 6 Fitting parameters of strength surface at various relaxation durations

编号 t/h qm/MPa pm/MPa b a1 a2/MPa qcr/MPa pcr/MPa t0 0 4.214 2.904 0.149 3.300 0 3.00 11 t1 0.01 3.652 2.708 0.160 2.210 1.20 t2 0.0236 3.470 2.666 0.161 2.097 0.90 t3 0.10 3.257 2.587 0.174 1.861 0.75 t4 0.25 3.100 2.534 0.178 1.781 0.66 t5 0.70 2.938 2.479 0.193 1.767 0.60 t6 1.32 2.824 2.440 0.199 1.721 0.50 t7 2.42 2.719 2.407 0.212 1.722 0.41 t8 4.59 2.644 2.382 0.238 1.689 0.27 t9 8.26 2.517 2.336 0.256 1.648 0.30 t10 14.49 2.366 2.289 0.241 1.646 0.21 t11 21.90 2.302 2.269 0.264 1.526 0.19