干湿循环增湿与脱湿过程中高液限粘土强度变化

对高液限原状粘土进行了增湿和脱湿两种不同干湿循环路径中不同含水量变化的高液限粘土快剪试验．试验结果表明，干湿循环增湿和脱湿过程中含水量的增加或减少对粘土抗剪强度具有较为相同的弱化或强化效应，具体表现为含水量的增加会导致高液限粘土的粘聚力呈近似幂函数形式衰减，内摩擦角呈近似二次函数形式衰减；对于相同的含水率，增湿和脱湿过...

Change of high liquid limit clay intensity during humidification and dehumidification process of the dry-wet cycle

High liquid limit undisturbed clay quick shear tests with different moisture were carried out through different dry-wet cycle path, including humidification and dehumidification process of the dry-wet cycle. Test results show that, with moisture content of high liquid limit clay increasing or decreasing in the process of humidification and dehumidification of dry-wet cycle, the shear strength of clay soil exhibits similar trend of weakening or strengthening effect. The specific performance is that the increase of the moisture content can lead to reduction of the cohesive force of the high liquid plastic clay in the form of approximate power function and the internal friction angle is approximately in the form of quadratic function decay. For the same moisture content, the shear strength of undisturbed high liquid limit clay is quite different in humidification and dehumidification process tests. Usually, the results tested in humidification orocess are higher than that in dehumidification process.