喀麦隆西海岸硬土的水理特性研究

为了加强对非洲西海岸硬土水理特性的规律性认识,提高硬土勘察设计准确性,以喀麦隆西海岸的地质调查、钻探、现场测试和室内试验成果为基础,重点研究硬土的胀缩性、崩解性和软化性等水理性质。结果表明,研究区硬土呈现无胀缩性、弱崩解-无崩解性,多面卸荷及临水状态下软化程度高,顶面卸荷及临水状态下无软化,可直接作为重力式码头基础持力层。经过研究,初步确立了非洲西海岸硬土的水理性质指标特征,提供了硬土工程设计的参考性基础资料。

On water-physical property of hard clay at coast of Cameroon

In order to fully find out water-physical characteristics of hard clay and improve the accuracy of geotechnical design in the west coast of Africa, water-physical properties of hard clay in the west coast of Cameroon are analyzed according to the results of surface geological survey, drilling, in-situ test and laboratory test, focusing specially on properties of swelling and shrinkage, collapse and softening. In hard clay, the analysis demonstrates that there is no swelling and shrinkage, slightly to non collapse, strong softening based on the status of unloading and facing water under multiple directions and unsoftening based on the status of surface unloading and facing water. The hard clay can be the bearing stratum of shallow foundation directly. According to the research, primarily waterphysical characteristics of hard clay are established in the west coast of Africa, reference data on the geotechnical design of hard clay are formed.