Scholarlink

<p>Mass movements constitute a major geohazard in the Djoundé, Laïndé and Ouro-Hala (DLOH) area of northern Cameroon, where slope instability controls remain poorly documented. This study characterizes geotechnical properties of soils and rocks and identifies mechanisms governing slope instability for hazard assessment and mitigation. Field investigations included seven soil pits (90–130&#xa0;cm deep, ~ 50&#xa0;cm diameter) and three rock samples (~ 10&#xa0;kg each). Laboratory analyses comprised grain-size distribution, Atterberg limits, Proctor compaction, California Bearing Ratio (CBR), and Micro-Deval and Los Angeles abrasion tests. Soils are predominantly coarse-grained, with gravel contents of 44–96%, sand 13–30%, and silt 9–12%, indicating poor grading and high heterogeneity. Liquid limits range from 33.2 to 51.7% and plasticity indices from 12.5 to 21%, reflecting low to moderate plasticity. CBR values (40–54%) indicate good bearing capacity but limited predictive value for slope failure. Rock samples show low Micro-Deval (1.6–2.0%) and Los Angeles (17.9–18.1%) values, indicating high resistance to abrasion, although field observations reveal weathering and fracturing. Results indicate instability is controlled by poorly graded soils, high porosity, weathered volcanic rocks, and moisture variations. Findings support Rockfalls hazard assessment and risk reduction in tropical mountainous environments and provide a basis for sustainable infrastructure planning and engineering design in the region study area.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Geotechnical investigations of mass movements in Djounde, Lainde and Ouro-Hala (Cameroon)

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月28日

查看全文
  • Amza Mfossi,
  • Ghislain Zangmo Tefogoum,
  • Merlin Gountié Dedzo,
  • Simon Ngos III

摘要

Mass movements constitute a major geohazard in the Djoundé, Laïndé and Ouro-Hala (DLOH) area of northern Cameroon, where slope instability controls remain poorly documented. This study characterizes geotechnical properties of soils and rocks and identifies mechanisms governing slope instability for hazard assessment and mitigation. Field investigations included seven soil pits (90–130 cm deep, ~ 50 cm diameter) and three rock samples (~ 10 kg each). Laboratory analyses comprised grain-size distribution, Atterberg limits, Proctor compaction, California Bearing Ratio (CBR), and Micro-Deval and Los Angeles abrasion tests. Soils are predominantly coarse-grained, with gravel contents of 44–96%, sand 13–30%, and silt 9–12%, indicating poor grading and high heterogeneity. Liquid limits range from 33.2 to 51.7% and plasticity indices from 12.5 to 21%, reflecting low to moderate plasticity. CBR values (40–54%) indicate good bearing capacity but limited predictive value for slope failure. Rock samples show low Micro-Deval (1.6–2.0%) and Los Angeles (17.9–18.1%) values, indicating high resistance to abrasion, although field observations reveal weathering and fracturing. Results indicate instability is controlled by poorly graded soils, high porosity, weathered volcanic rocks, and moisture variations. Findings support Rockfalls hazard assessment and risk reduction in tropical mountainous environments and provide a basis for sustainable infrastructure planning and engineering design in the region study area.