鄂西巴东组红层泥岩的水理性质研究

Research on water-physical property of red bed mudstone of Badong formation

针对红层软岩遇水易软化、崩解的特点,以巴东组红层软岩为例,选取泥岩、粉砂岩进行浸水崩解试验、单轴抗压强度试验,分析红层软岩在不同含水率的情况下的崩解性、软化性。试验结果表明,泥岩水理性质与所含的黏土矿物有关,也与含水率的交替变化程度有关。在天然含水率状态下浸水的岩样,其水理性显现程度较小,而发生干湿交替循环的岩样再浸水后,其水理性就变得极其强烈。

Aiming at red soil＇s characteristics of prone to softening and disintegration, taking the red bed mudstone of Badong formation as an example, the mudstone and sihstone were selected to conduct a soaking- disintegration test and a uniaxial com- pression test, and the disintegration and softening of red bed mudstone under different water contents were analyzed. The test re- sults showed that the water - physical property of mudstone is related with the clayey mineral content and the alternative change degree of water content ; under the condition of natural water content, the water - physical property of soaked rock sample is light, but after dry - moisture cycling process, the water - physical property becomes very strong.