山区公路高切坡岩土安全分区研究

将统一强度理论和Lode应力参数进行耦合，建立计算山区公路高切坡局部安全稳定的数学模型。基于ArcGIS9.3对高切坡数据进行前期处理和分析，采用有限元分析软件对高切坡研究断面进行数值模拟，得到断面各节点的相关参数，利用ArcGIS9.3对数值模拟结果进行后期分析与可视化，最终得到研究断面岩土安全分区图。以重庆市两巫（巫山－巫溪）路高切坡K88＋680为实例，模拟得到K88＋660、K88＋680和K88＋700三个断面的安全分区图，并在此基础上通过空间插值方法得出该路段坡面的安全分区图。研究结果与实际相吻合，可用于指导该高切坡的开挖及防治，同时研究方法对于高切坡的局部安全研究具有重要的参考价值。

Safety zoning of high-cutting slope along highway in mountainous area

Through coupling the unified strength theory and the Lode stress parameters, a mathematical model is established for calculating the local safety and stability of high-cutting slopes along highway in mountainous area. Based on ArcGIS9.3, the high-cutting slope data are pre-processed and analyzed. And by using the finite element analysis software, the study profiles of high-cutting slope are numerically simulated. The relevant parameters of each node of the studied profiles are acquired. Then the stimulation results are further analyzed and visualized by ArcGIS9.3. Finally, the safety zoning maps of the study profiles are obtained. The K88+680 high-cutting slope of Wushan-Wuxi mountain road in Chongqing is taken as an example profile. The safety zoning maps of three different profiles at K88+660, K88+680 and K88+700 are stimulated respectively. And the safety zoning map of the mountain road from K88+660 to K88+700 is obtained by spatial interpolation. Overall, the study result coincides with the actual information very well. The result can be used to guide the excavation and control of the high-cutting slope mountain road. And the research method has an important reference value to the local high-cutting slope mountain road security research as well.