合肥地铁更新统黏土崩解特性试验研究

Experimental Study on Disintegration Characteristics of Clay in the Pleistocene Series along Hefei Metro

针对合肥地铁更新统黏土崩解特性,采用室内模拟,进行天然、风干、烘干三种不同状态下的浸水崩解试验,研究崩解性与土体失水程度的关系。试验研究结果表明:失水越多,失水过程越剧烈,崩解量就越大,崩解速率就越大;而土体风干后浸水崩解过程可分为三个阶段:初期的慢速崩解,中期的快速崩解和后期的慢速崩解。

In relation to the disintegration characteristics of clay in the Pleistocene Series along Hefei Metro, the water-disintegration tests under the states of nature, air drying and oven drying were conducted by indoor simulation so as to study the relation between the disintegration characteristics and the water loss content of soil mass. The results show that as the water loss increases, the loss process is more severe, the disintegration amount is larger, and the disintegration rate is faster; in addition, the water-disintegration process of the soil mass after air drying may be divided into three stages： slow disintegration in the early stage, fast disintegration in the middle stage, and slow disintegration in the late stage.