Abstract
Rainfall-induced landslides are becoming ever more frequent in many regions in the world. In general, the slope failures occur during or immediately after the rainfall. In Tunisia, several regions are concerned by deep or shallow landslides induced by rainwater infiltration, particular in Beja (Tibar). However, due to the high cost of field tests, the quantification of rainwater effects still not adequately clarified. Different small scale slope models were used to study landslide as a result of change in saturation degree. In this paper, we present numerical simulation of rainfall tests on small scale model used clayey soil from a landslide site in Beja, Tibar. The aim of this paper is to study landslide in small scale clayey slope used the same characteristics and conditions of the experimental model realised by Rolando et al. (2004). For this simulation, we will use the numerical approach used to simulate rainfall tests already developed by Rolando et al. (2004). Numerical simulation is conducted using CODE-BRIGHT software.
Highlights
Numerous research studies have been conducted to investigate infiltration of rainwater into a slope and the effect of water infiltration on slope stability
In order to study the landslide as a result of change in saturation degree, and to clarify the rainwater infiltration effects, different small scale models slopes were used
The objective is to study landslide in the clayey soil by numerical simulation of a rainfall test on reduced model using the same geometric characteristics, initial conditions and boundary conditions of the physical model used in the tests realised by Rolando et al (2004), only the soil used to construct the experimental slope is changed with the fact that the similitude conditions are not discussed in this paper
Summary
Numerous research studies have been conducted to investigate infiltration of rainwater into a slope and the effect of water infiltration on slope stability. The physical laboratory model with reduced dimensions has many advantages, like the identification of failure mechanisms, failure initiation and slope movements. In this part, we will present results of numerical simulation of rainfall test on small scale clayey slope model. The objective is to study landslide in the clayey soil by numerical simulation of a rainfall test on reduced model using the same geometric characteristics, initial conditions and boundary conditions of the physical model used in the tests realised by Rolando et al (2004), only the soil used to construct the experimental slope is changed with the fact that the similitude conditions are not discussed in this paper (see Hamrouni et al, 2016).
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