论文部分内容阅读
本文广泛评价了孟加拉三角洲冲积平原地基土岩土工程特性,为开发规划和建设提供有用的指导。地基土一般由砂质土组成,这种砂质土在侧向短距离内,会相当频繁而无规律地出现可压缩的有机粉砂和泥炭的混合层。上部6～10m的地基承载力已评定为低至很低。具有中到高承载能力的均质细砂一般为该地基土剖面的主要部分,深度20m以下尤其如此。而这种细砂层在沼泽区是完全缺失的。按岩土和环境的分类,对潜在的建筑问题作了描述。这种问题包括建筑物、桥梁、水工构筑物等的地基问题,是由于表层土的软弱和无规律的性质引起的。岩土问题经常和这个国家的自然地理和地貌环境有关。洪水和河岸冲蚀是主要的环境问题,对生命、财产和建筑构成多方面威胁。本文提出了解决这些问题的建议。
This article has extensively evaluated the geotechnical characteristics of foundation soil in the alluvial plain of the Bengal Delta, and provided useful guidance for development planning and construction. Ground soils are generally composed of sandy soils, which, within a short lateral distance, can be a mixture of compressible organic silt and peat quite frequently and irregularly. The foundation bearing capacity of the upper 6 to 10m has been rated as low to very low. Homogeneous fine sand with medium to high load carrying capacity is generally the main part of the ground soil profile, especially below the depth of 20m. This fine sand layer is completely missing in the marsh area. According to the classification of rock and soil and environment, the potential construction problems are described. Such problems include the foundation problems of buildings, bridges, hydraulic structures, etc., which are caused by the weak and irregular nature of the topsoil. Geotechnical issues are often related to the country’s natural geography and landscape environment. Floods and riverbank erosion are major environmental problems that pose multiple threats to life, property and buildings. This article proposes solutions to these problems.