砂改良土干湿循环下胀缩性研究

STUDY ON SWELLING SHRINKAGE OF SAND IMPROVED SOIL UNDER DRYING-WETTING CYCLE

在有荷载条件下,通过模拟干湿循环过程的试验,研究了李渡红土加入掺和料砂后的胀缩性,得到砂改良土胀缩变形变化规律。在荷载条件下,砂改良土的绝对和相对胀缩率比素土的绝对和相对胀缩率明显低,且含砂量在一定范围内,土样的绝对和相对胀缩率随土料中含砂量增多而减小。

By employing the experiment to simulate the drying-wetting cycle, we have studied the swelling shrinkage of Lidu laterite added with sand under the condition of loading, getting the variation law of swelling shrinkage of sand improved soil. The absolute and relative inflation rates of sand im- proved soil are obviously lower than that of pure soil under the load conditions. With the increase of the content of the soil, the absolute and relative inflation rates decrease when the content of the sand is in a certain range.