基于三剪强度准则的库伦土压力计算

基于三剪强度准则研究了库伦土压力计算问题。(1)采用能反映岩土在三向应力作用下强度特征的三剪强度准则代替莫尔-库伦强度准则,该准则表达的是一个强度准则系列,莫尔-库伦强度准则仅为其特例。(2)基于三剪强度准则所得到的库伦土压力计算式可适用于不同的工程岩土,以往基于莫尔-库伦强度准则的土压力计算式也仅为其特例。(3)实例计算结果表明,岩土应力状态和力学特性对土压力值有一定影响。另外,采用莫尔-库伦强度准则时,库伦主动土压力值可能会因没有考虑中间主应力效应而高估,库伦被动土压力值则相反。

Calculation of Coulomb's Earth Pressure Based on Triple Shear Failure Criterion

The Coulomb's earth pressure is researched based on the triple shear failure criterion.(1)The Mohr-Coulomb failure criterion is replaced by the triple shear failure criterion in which the failure properties of the rock and soil under the three dimensional stress states can be reflected better than the Mohr-Coulomb failure criterion used before.The triple shear failure criterion takes the Mohr-Coulomb failure criterion only one of its special cases.(2)The Coulomb's earth pressure deduced from the new failure...