藏东南地区高陡边坡堆积土力学特性试验研究

通过对藏东南地区高陡边坡堆积土的实地调研和大型三轴试验:高陡边坡因为地震作用和降雨容易发生滑坡地质灾害;高陡边坡堆积土试样三轴剪切后,土样应力~应变特性为应变硬化型,土样的抗剪强度包络线为直线,符合莫尔库仑强度准则。在三轴试验中,试样沿着抗剪强度最弱的剪切面发生破坏,剪切面位于试样底部与圆柱土体的侧面呈近似45°的斜面上。

According to the field investigation and large-scale triaxial test of the pileup soil of the high and steep slope in the southeast of Tibet, it can be concluded. The high and steep slope is prone to geological disasters because of earthquake action and rainfall. Triaxial specimens of piled soil on high and steep slopes have a fusiform shape after shear. The stress-strain characteristic of soil sample is strain hardening type. The soil sample conforms to the Mohr coulomb strength criterion. Triaxial test sample middle-earth along the shear strength of the weak shear plane damage occurs, piled high and steep slope soil shear plane located at the base of the soil sample with cylindrical soil profile was approximately 45° incline.