广东茂名膨胀土工程性质及胀害分析

Analyses of Engineering Geology and Swelling Damage of Swelling Soil in Maoming, Guangdong Province

本文从实地调查(包括工程地质、水文地质及房裂情况)入手,结合大量的室内试验,对茂名膨胀土的工程特征进行了研究。认为茂名膨胀土属伊利石型膨胀土,同时探讨了膨胀性与粘土矿物类型及含量、微结构类型及阳离子交换量的关系,指出了季节性干湿交替是岩土含水量变化的主要原因,提出了膨胀土地区民房开裂的防治措施。

Beginning from on-the-spot survey (involving engineering geology, hydrogeology and condition of structure fracture) collaborated with large amount of laboratory experiments the engineering characteristics of swelling soil in Maoming city are studied in this paper. The swelling soil in Maoming district is sorted into the type of illite. The relationship among swell property, contents and types of clay minerals, types of microstructure and cation exchange capacities are also studied. It shows that the seasonal alternation of dry and wet is the main reason for the variation of water content in soil. prevention measures for the fracture of civil buildings in swelling soil district are suggested.