土工基础

›› 2011, Vol. 25 ›› Issue (1): 45-.

• 工程实录 • 上一篇    下一篇

绿泥石片岩遇水软化的强度试验及机理研究

周 辉1，2， 杨 鑫1， 胡其志1 ， 程昌炳2   

  1. (1.湖北工业大学土木工程与建筑学院， 武汉 430068； 2.中国科学院武汉岩土力学研究所，武汉 430071)
  • 收稿日期:2010-03-31 出版日期:2011-02-20 发布日期:2014-06-27
  • 作者简介:周辉，男，1973年生,博士后，研究员，主要从事岩石细观力学计算方法、流固耦合和孔隙介质力学理论及岩体非线性动力学方面的研究工作。

Strength Test and Mechanism of Softening of Chlorite Schist

ZHOU  Hui1,2, YANG  Xin1, HU  Qi  zhi1, CHENG  Chang  bing2   

  1. (1. School of Civil Engineering and Architecture, Huhei University of Technology, Wuhan  430068; 
    2. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan  430071, China)
  • Received:2010-03-31 Online:2011-02-20 Published:2014-06-27

摘要： 选取四川省雅砻江锦屏二级水电站地下围岩绿泥石片岩，分别用饱和NaCl溶液和蒸馏水进行饱和，利用RMT试验机和MTS试验机进行单轴和普通三轴的室内强度试验，分别测定绿泥石片岩在两种饱和状态和干燥状态下的强度指标。对比绿泥石片岩力学参数的变化，通过对岩石双电层进行微观机理分析，得出绿泥石片岩遇水后强度有显著的降低，表现出明显的遇水软化特性；软化的主要原因是岩石周围双电层的影响，且双电层厚度越厚,岩石强度降低越多;双电层厚度越薄，岩石强度降低越少。

关键词: 绿泥石片岩, 强度试验, 饱和NaCl溶液, 饱和, 双电层

Abstract: The chlorite schist sample from the Jingping Ⅱ Hhydropower Prjoect on Yalong River was saturated by the saturated NaCl solution and the distilled water, its uniaxial and conventional triaxial test was done in the RMT and MTS test machine, in which the strength index of saturated and dry state in different solutions was obtained. Compared with its mechanical parameters' change and analyzed its micro\|mechanism of electric double layer, results showed that the strength of chlorite schist under water was decreased obviously, which showed its softening under water because of the influence of its electric double layer, the more the thickness of electric double layer was, the more the decrease of the chlorite schist's strength was, vice versa.