Comparative Analysis of the Slope Stability Using Slide and Plaxis 2D Software: A Case Study of Tombel Pozzolan Quarry (South-West Cameroon)

IF 2.1 Q3 SOIL SCIENCE

Applied and Environmental Soil Science Pub Date : 2024-05-21 DOI:10.1155/2024/8260177

Mambou Ngueyep Luc Leroy, O. Kenmoe, H. T. Tchognia Nkuissi, Sylvain Lawou Kouayep, Gael Nkenwoum Chebou, André Chéagé Chamgoué, Innoua Mohamadou

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引用次数: 0

Abstract

The presented study attempted to use coupled finite element numerical (FEM) and analytical limit equilibrium (LEM) procedures to provide comparative graphical charts demonstrating the geometry, the groundwater condition, the safety factor, and the characteristics of the support, which were implemented in the Dangote Pozzolan quarry at Tombel to preventing the slope instability’s occurrence. Field and laboratory work have been carried out to collect and characterize data. The results obtained with the LEM procedure via Slide 2D showed a safety factor of 0.87, indicating an unstable slope compared to a safety factor of 1.0 obtained with the FEM procedure via Plaxis 2D corresponding to a limited equilibrium state of the slope. The characteristics of the support that can be used to stabilize the slopes are geotextile support of 100% strip coverage, a tensile strength of 100 kN/m, an adhesion property of 4 kPa, and a frictional angle of 40°. The geotextile is anchored at the slope surface. After the support has been introduced, and the new safety factor calculated, the support automatically increased the safety factor value from 0.87 to 1.51 by using Slide 2D and from 1.0 to 1.98 by using Plaxis 2D, which is from an unstable state to a very stable state.

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使用 Slide 和 Plaxis 2D 软件对边坡稳定性进行比较分析：Tombel Pozzolan 采石场（喀麦隆西南部）案例研究

本研究试图使用耦合有限元数值（FEM）和分析极限平衡（LEM）程序，提供比较图表，展示位于 Tombel 的 Dangote Pozzolan 采石场的几何形状、地下水条件、安全系数和支撑物特征，以防止斜坡失稳的发生。为了收集数据并确定其特征，我们开展了实地和实验室工作。通过 Slide 2D 的 LEM 程序得出的结果显示安全系数为 0.87，表明斜坡不稳定，而通过 Plaxis 2D 的 FEM 程序得出的安全系数为 1.0，表明斜坡处于有限平衡状态。可用于稳定斜坡的支撑物的特点是土工织物支撑物的条带覆盖率为 100%，抗拉强度为 100 kN/m，粘附性能为 4 kPa，摩擦角为 40°。土工织物锚固在斜坡表面。引入支撑物并计算新的安全系数后，使用 Slide 2D 时，支撑物自动将安全系数值从 0.87 提高到 1.51；使用 Plaxis 2D 时，安全系数值从 1.0 提高到 1.98，即从不稳定性状态提高到非常稳定的状态。

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来源期刊

Applied and Environmental Soil Science Earth and Planetary Sciences-Earth-Surface Processes

CiteScore

4.00

自引率

4.50%

发文量

审稿时长

18 weeks

期刊介绍： Applied and Environmental Soil Science is a peer-reviewed, Open Access journal that publishes research and review articles in the field of soil science. Its coverage reflects the multidisciplinary nature of soil science, and focuses on studies that take account of the dynamics and spatial heterogeneity of processes in soil. Basic studies of the physical, chemical, biochemical, and biological properties of soil, innovations in soil analysis, and the development of statistical tools will be published. Among the major environmental issues addressed will be: -Pollution by trace elements and nutrients in excess- Climate change and global warming- Soil stability and erosion- Water quality- Quality of agricultural crops- Plant nutrition- Soil hydrology- Biodiversity of soils- Role of micro- and mesofauna in soil