【摘要】 用三向胀缩仪对南阳陶岔重塑膨胀土做了12个三向膨胀力试验,9个湿胀干缩试验和9个控制变形的膨胀力试验。试验结果表明,三向膨胀力不等,水平膨胀力小于竖向膨胀力;湿胀干缩使重塑膨胀土的膨胀力降低,第一次干湿循环后膨胀力减小最多;微小的位移可以使膨胀力大大降低,膨胀力与位移呈对数关系;给出了膨胀力与初始含水率和干密度的关系式。更多还原

【Abstract】 A series of tests were conducted for the unsaturated expansive soil using three-dimensional swell-shrinking device.The three-dimensional swell-shrinking characteristics of remolded expansive soils was studied.According to the test results,three-dimensional swelling pressures are unequal.The lateral swelling pressure is smaller than vertical swelling pressure.The swelling pressure of remolded expansive soil is decreasing with wet-dry cycles.And a small strain could bring obvious decreasing of swelling pressure.The logarithmic relation between lateral pressure and strain is proposed.A formula of vertical swelling pressure with initial water content and dry density is given.更多还原