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Effects of heavy rainfall on the slope stability – A case study on Imogiri Cemetery: The graveyard complex of Mataram Royal Kings

机译:大雨降雨对坡稳定性的影响 - 以伊莫里墓地为例:Mataram Royal Kings的墓地综合体

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Rainfall is the most common cause of landslides in Indonesia. On March 17, 2019, a landslide occurred in the Imogiri Cemetery, Mataram Royal Kings Graveyard Complex. It was expected to have been triggered by heavy rainfall of 148 mm d~(–1)intensity. This research aims to determine the effect of rainfall on the slope stability on the landslide at the Imogiri Cemetery. The study was carried out by slope stability modelling using Geostudio software. Rainfall information and soil characteristics data obtained from testing soil samples in the Soil Mechanics Laboratory, Civil and Environmental Engineering, Universitas Gadjah Mada, were used as input on the software. The output of the analysis is the factor of safety (FS) value, defined as the ratio of the shear strength to the shear stress. Without the rains, the FS value is about 2.44, which means the slope stability is stable. After heavy rainfall, the FS value decreased to 1.209 at the end of the simulation, which indicates happen the slope instability. Based on the simulation, the FS value depends on the volume of water content and hydraulic conductivity of the soil. Result of this study shows that heavy rainfall can trigger slope instability in the Imogiri Cemetery.
机译:降雨是印度尼西亚山体滑坡最常见的原因。 2019年3月17日,Mataram Royal Kings墓地综合体的iMogiri公墓发生了一个山体滑坡。预计将被148毫米D〜(-1)强度的大雨引发。本研究旨在确定降雨对iMogiri公墓的滑坡稳定性的影响。该研究是通过使用GeoStudio软件的斜率稳定性建模进行的。降雨信息和土壤特征从测试土壤样本中的土壤样本,土木工程实验室,民间和环境工程,大学上的Gadjah Mada,被用作软件的投入。分析的输出是安全(FS)值的因子,定义为剪切强度与剪切应力的比率。没有降雨,FS值约为2.44,这意味着坡度稳定性是稳定的。降雨过大后,在模拟结束时,FS值降至1.209,这表明斜坡不稳定。基于模拟,FS值取决于土壤的水含量和水力导电率。本研究的结果表明,大雨可以在iMogiri公墓中触发坡度不稳定。

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