Landslide Susceptibility in Relation to Correlation of Groundwater Development and Ground Condition

Siti Noor Linda, Binti Taib and Onni Suhaiza, Binti Selaman and Chen, C. L. and Lim, R. and Dayangku Salma, Binti Awang Ismail (2017) Landslide Susceptibility in Relation to Correlation of Groundwater Development and Ground Condition. Advances in Civil Engineering, 2017 (1). pp. 1-7. ISSN 1687-8086

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Abstract

Rainfall is inevitably one of the main factors that trigger landslides. However, not much study has been conducted on the impact of groundwater rise on slope stability. *us, this study is intended to focus on the rise of the groundwater level from the bottom of the slope which would lead to landslides due to pore pressure development by eliminating other landslide-triggering factors (i.e., in2ltration and surface runo3). Saturated sand was used for slope modeling, and sand densities of 1523 kg/m3 , 1562 kg/m3 , and 1592 kg/m3 were tested with a constant slope angle of 45°. Another set of experiments was also performed on slopes having angles of 25°, 45°, and 60° and with a maintained density of sand at 1562 kg/m3 . *rough observation, failure was initiated 2rst at the toe of the slope before minor and major slips or total collapse occurs. Dimensions of slip surfaces were measured and included in SLOPE/W for the computation of the safety factor. In conclusion, safety factors are found to be higher in denser soil and in the lowest slope angle. However, faster occurrence of collapse in denser soil was identi2ed and could be contributed by the faster pore water pressure development.

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