苏丹膨胀土的工程性质与处理方法

Engineering Properties and Mitigation Methods of Expansive Soil in Munga,Sudan

以苏丹Munga地区某输电线路岩土工程勘察项目为背景,分析了该区膨胀土的工程性质,并针对该区膨胀土的胀缩性能提出了膨胀土危害的防灾思路,建立了该区膨胀土塑性指数与液限的相关方程,对膨胀力与初始含水量的相关性进行了分析,研究成果对该地区工程建设地基基础设计及我国膨胀土的研究具有一定参考价值。

Expansive soils are mainly composed of highly hydrophilic clay minerals such as montmorillonites and illites. They have typical characterizations of expansive soils., high plasticity clay with typical expansive structures, fissures, strong swell- contraction and strength reduction with increase of moisture content. This paper presents the case history of the geotechnical investigation for a power transmission line project in Munga, Sudan. The engineering properties of the expansive soils in the re- gion are evaluated and the methods for mitigating the hazards induced by the expansive soils are compared. The empirical corre- lations among the expansive soil properties and plastic index as well as liquid limits are established. The paper also evaluates the correlation between the expansion force and the initial moisture content. These results can provide guide lines for the foundation constructions in Munga region as well as the research of expansive soils in China.