Among the different techniques usually employed to stabilize landslide bodies, the use of one or more rows of piles firmly embedded in the stable portion of the slope is commonly considered a reliable and effective measure. Nevertheless, a landslide may still be reactivated by an increase in the groundwater level due to rainfall. In this context, a novel method is proposed in the present study for a preliminary evaluation of the rainfall-induced movements of landslides in the presence of stabilizing piles. This method uses a water balance equation to evaluate the groundwater level changes due to rainfall, and the motion equation to relate these changes to landslide displacements. The piles contrast the landslide movements by a passive resistance force the value of which depends on the pile–soil failure mode and pile arrangement. The proposed method appears attractive from an engineering viewpoint, since it can be readily implemented in a common electronic sheet and requires few parameters as input data. Most of these parameters can be obtained from conventional geotechnical tests, whereas the remaining ones should be calibrated on the basis of available measurements of rainfall, groundwater level and soil displacement. After performing this parameter calibration, the method may be employed for predictive purposes to relate future landslide movements to expected rainfall scenarios. The predictive capability of the present approach is assessed by comparing the results with those observed in a published case study concerning a landslide body periodically reactivated by rainfall, in which a row of stabilizing piles was installed.

在通常用于稳定滑坡体的不同技术中，通常认为将一排或多排桩牢固地嵌入斜坡的稳定部分是一种可靠而有效的措施。尽管如此，由于降雨导致地下水位增加，滑坡可能仍会重新活化。在这种情况下，本研究提出了一种新方法，用于在稳定桩存在下对降雨引起的滑坡运动进行初步评估。该方法使用水平衡方程式评估降雨引起的地下水位变化，并使用运动方程式将这些变化与滑坡位移联系起来。桩通过被动阻力与滑坡运动形成对比，被动阻力的大小取决于桩​​-土的破坏模式和桩的布置。从工程的观点来看，所提出的方法似乎很有吸引力，因为它可以容易地在普通电子纸中实现并且需要很少的参数作为输入数据。这些参数中的大多数可以从常规岩土测试中获得，而其余参数应根据可用的降雨，地下水位和土壤位移的测量结果进行校准。在执行该参数校准之后，该方法可以用于预测目的，以将未来的滑坡运动与预期的降雨情况相关联。通过将结果与已发表的案例研究中观察到的结果进行比较，评估该方法的预测能力，该案例研究涉及因降雨而周期性地重新激活的滑坡体，其中安装了一排稳定桩。