基于场变量的公路边坡稳定分析

Stability Analysis of Highway Slope Based on Field Variables

利用ABAQUS中场变量对时间增量步控制的优势,提出了一种公路边坡稳定性分析新方法—基于场变量的强度折减法。对该方法应用于公路边坡稳定性分析的可行性进行验证,并与极限平衡法以及二分法计算得出的最小安全系数进行比较,分析其相对误差。结果表明:该方法用于公路边坡稳定性分析是有效、可靠的,提高了计算效率,对于公路工程边坡稳定性分析具有重要意义。

Using field variable provided by ABAQUS,which could take advantage of controlling the time incremental step,this paper come up with a new method-strength reduction finite element method based on field variables.Combined with some literatures,the feasibility of this method for slope stability analysis has been verified,and the minimum safety coefficient obtained by this method has been compared with the method of limit equilibrium and dichotomy,and analyzed the relative errors.It also analyze the reliability of the highway slope safety coefficient calculation under the different slope angles. The results show that the minimum safety coefficient obtained by this method is effective and reliable,and this could simplify the calculational process,so it is of great significance for slope stability analysis in practical engineering.