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<p>Mbouda is a town at the extremity of the West Region of Cameroon. The town center and outskirts are experiencing rapid expansion, and handling the intricacies of urban growth can be complex in a context where the National Urban Policy is in its infancy. This work aims to provide basic information that could guide planners and developers towards appropriate forms of development while avoiding some form of urban disorder and disaster. Field work involved a grid based, macroscopic observations and identification of rocks and soils for which, disturbed and undisturbed samples were collected for analysis along with laboratory testing including identification (Atterberg limits, specific gravity, water content, granulometry), and mechanical characterization (Proctor test, CBR test, shear box, and oedometer test). The testing results enabled the soils to be classified as high plasticity inorganic silts-MH and silty gravels-GM according to the USCS. In addition, three other classification systems were utilized. The shear strength parameters, compressibility and compaction characteristics revealed that the soils possessed low friction angles with cohesion values of 25 and 19&#xa0;kPa. The clay soils were over-consolidated and&#xa0;the soils having better engineering characteristics possessed a&#xa0;greater percentage of coarse fractions. As such, the lateritic gravels gave the best results. Based on strength, swelling properties, stability, suitability for housing and load-bearing capacity, the preliminary mapping of the area classified the soils as possessing very good, average, and poor geotechnical characteristics, which respectively covered 13.8, 20.8, and 65.4% of the land area.</p>

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Preliminary mapping and geotechnical characterization of the soils of Mbouda, Cameroon

  • 期刊论文

  • 发表日期：

    2025年6月2日

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  • Raoul T Lontsi,
  • Bertille Illalie K Manefouet,
  • Valentine Y Katte,
  • Maurice Kwekam

摘要

Mbouda is a town at the extremity of the West Region of Cameroon. The town center and outskirts are experiencing rapid expansion, and handling the intricacies of urban growth can be complex in a context where the National Urban Policy is in its infancy. This work aims to provide basic information that could guide planners and developers towards appropriate forms of development while avoiding some form of urban disorder and disaster. Field work involved a grid based, macroscopic observations and identification of rocks and soils for which, disturbed and undisturbed samples were collected for analysis along with laboratory testing including identification (Atterberg limits, specific gravity, water content, granulometry), and mechanical characterization (Proctor test, CBR test, shear box, and oedometer test). The testing results enabled the soils to be classified as high plasticity inorganic silts-MH and silty gravels-GM according to the USCS. In addition, three other classification systems were utilized. The shear strength parameters, compressibility and compaction characteristics revealed that the soils possessed low friction angles with cohesion values of 25 and 19 kPa. The clay soils were over-consolidated and the soils having better engineering characteristics possessed a greater percentage of coarse fractions. As such, the lateritic gravels gave the best results. Based on strength, swelling properties, stability, suitability for housing and load-bearing capacity, the preliminary mapping of the area classified the soils as possessing very good, average, and poor geotechnical characteristics, which respectively covered 13.8, 20.8, and 65.4% of the land area.