开挖边坡松弛区的确定与数值分析方法

边坡失稳与开挖卸荷在坡体内产生的松弛区有关，正确确定松弛区范围是合理设置加固文档结构的关键．根据应力分析的结果，阐明了边坡开挖后应力与位移向坡体内部呈衰减变化趋势，由此给出了坡体开挖松弛区的概念；提出可以通过沿水平方向或与坡顶地面线平行的参考线的应力或位移变化曲线确定坡体开挖松弛区范围，给出了用数值分析方法确定开挖松弛区的流程图，并通过工程实例详细说明了确定松弛区的方法．

Determination and Numerical Analysis Method of Relaxation Region for Cutting Slope

Slope instability is related to the relaxation region caused by slope cutting. It is very important to properly determine the relaxation region when a cutting slope is remedied. From the theoretical results of stress analyses for a cutting slope, it is pointed out that the stress and displacement of the slope become smaller and smaller away from the slope surface. The concept of relaxation region is given. It can be determined based on the stress or displacement curves for different reference lines horizontal or parallel with the ground line on the slope top. In addition, the numerical analysis flow chart is given, and by taking a practical project as an example, the way to determine the relaxation region is explained.