云南哀牢山某滑坡滑体与滑带土工程性质试验研究

A study on the engineering properties of sliding-body and sliding-zone soil at Ailaoshan in Yunnan Province

摘要: 由于降雨诱发,云南哀牢山地区浅层滑坡时有发生。本文通过获取该区某一滑体上部与滑带处残-坡积土试样,利用KTG全自动三轴剪切仪,在剪切速率为0.5%/min条件下对残-坡积土应力-应变关系、强度随含水率的变化规律进行了试验研究,对试验结果的分析表明:滑体土与滑带土的应力-应变关系在塑限含水率之前呈加工软化的形态,而在塑限含水率之后呈加工硬化的形态。两种土的强度参数随含水率的增大而衰减,但是滑体土强度参数衰减速度较快。内聚力与内摩擦角随含水率变化规律,较好地符合指数函数关系和线性关系。

Abstract: As a result of rainfall,shallow landslides occur from time to time at Ailaoshan areas.In this paper,the stress-strain relationships and the strength parameters of the soil on the change in moisture content at shear rate of 0.5% /min are studied by gaining the soil from the upper infiltration area and sliding zone of one slip and taking advantage of the automatic KTG triaxial shear device.The experimental results show that the stress-strain relationships of landslide and sliding zone soil appear ...