The failure of engineering slopes may cause great property loss and casualties, against which the slope deformation monitoring and instrumentation are needed. To investigate the relationship between safety factors and the displacements/strains of slopes, ten synthetic numerical models with different slope heights, slope angles, ranges of loading and soil parameters were designed and tested via finite difference code FLAC. By applying incremental load on the top of slope, the distribution of strain field and safety factor of slope were analyzed. The results indicated that there are three different modes of strain development inside the slope under uniform strip loading. During failure progress, the factors of safety and the corresponding total strain amounts at different loading stages have been analyzed. Based on the results, a modified empirical formula relating safety factor to the average maximum horizontal strain was proposed, which can be used as a theoretical guidance for preliminary slope stability check based on the instrumented strains.

工程边坡的破坏可能会造成巨大的财产损失和人员伤亡，因此需要对边坡变形进行监测和检测。为了研究安全系数与边坡位移/应变之间的关系，设计了十个具有不同边坡高度，边坡角度，荷载范围和土壤参数的合成数值模型，并通过有限差分法FLAC进行了测试。通过在边坡顶部施加增量荷载，分析了边坡的应变场​​分布和安全系数。结果表明，在均匀条形荷载作用下，边坡内部存在三种不同的应变发展模式。在失效过程中，已经分析了不同加载阶段的安全因素和相应的总应变量。根据结果​​，