基于三剪统一强度准则的路基临界填土高度计算

Computing roadbed fill critical height based on the Triple-shear unified failure criterion

路基临界填土高度是高速公路中一个很重要的问题,是路基处理和施工期稳定控制的重要依据。应用三剪统一强度准则对路基的临界填土高度进行计算,结果表明:采用三剪强度准则相对于没有考虑中主应力的Mohr-Coulomb准则来说,可使地基承载力提高17%~50%,证明了采用该准则计算路基临界高度的准确性。并得出在考虑b值的情况下,所得的解更加符合实际情况。

Critical roadbed filling height is an important basis tor the roatlDetl treatment a,~u t^v ^- bility control of construction. The Triple - shear unified failure criterion was used to compute road- bed fill critical height. The results show that compared with the Mohr - Coulomb criterion, which does not consider intermediate principal stress, the Triple - shear unified failure criterion can in- crease foundation bearing capacity from 17% to 50%. The Triple - shear unified failure criterion is proved more accuracy. In the case of considering b,the solution closes to actual situation.