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Analysis of the triggering mechanism of landslide in the village Podi, Montenegro
Arabian Journal of Geosciences ( IF 1.827 ) Pub Date : 2021-01-12 , DOI: 10.1007/s12517-020-06285-8
Slobodan Zivaljevic , Zvonko Tomanovic , Milan Radulovic

Frequent landslides in the flysch zones along the Adriatic coast commonly develop on the contact between the sound flysch and Quaternary sediments. The reason for this is most often the increased pore pressure and degradation of material due to inadequately regulated surface and groundwater. A case of one such landslide in the south-western part of Montenegro is presented in this paper. The disposal of construction waste materials above the location of the village Podi was followed by the occurrence of a landslide which affected 3.5 ha of slope and damaged 27 houses in the village. In the course of legal proceedings initiated against the contractor, a question arose of whether the deposited material could have triggered the landslide. Response to this complex question required a multidisciplinary approach, including also a numerical parametric analysis. The results of such analysis indicated that the improper depositing of material above the village induced the landslide activation for two reasons: an increase in shear stress and a change in the natural groundwater regime, which in turn affected elevation in the pore water pressure. Numerical analyses indicated that with a moderate water table rising, the factor of safety decreased by some 20%, which in case of an already conditionally stable slope is sufficient to initiate the terrain movement and formation of a landslide on a wider area.



中文翻译:

黑山Podi村滑坡的触发机制分析

沿着亚得里亚海沿岸的复理带频发的滑坡通常发生在复理的复理带和第四纪沉积物之间的接触上。其原因通常是由于未适当调节的地表水和地下水导致孔隙压力增加和材料降解。本文介绍了一个在黑山西南部发生此类滑坡的案例。在Podi村上空处置建筑废料之后,发生了滑坡,影响了3.5公顷的斜坡,并损坏了该村的27栋房屋。在对承包商提起法律诉讼的过程中,提出了一个问题,即所存放的材料是否可能引发了滑坡。要回答这个复杂的问题,需要采取多学科的方法,还包括数值参数分析。这种分析的结果表明,村庄上方物质的不适当沉积引起了滑坡的活化,其原因有两个:剪应力的增加和天然地下水状况的变化,这反过来又影响了孔隙水压力的升高。数值分析表明,随着地下水位的适度上升,安全系数降低了约20%,这在已有条件的稳定斜坡的情况下足以启动地形运动并在更宽的区域形成滑坡。反过来又影响了孔隙水压力的升高。数值分析表明,随着地下水位的适度上升,安全系数降低了约20%,这在已有条件的稳定斜坡的情况下足以启动地形运动并在更宽的区域形成滑坡。进而影响孔隙水压力的升高。数值分析表明,随着地下水位的适度上升,安全系数降低了约20%,这在已有条件的稳定斜坡的情况下足以启动地形运动并在更宽的区域形成滑坡。

更新日期:2021-01-12
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