下部土壤含水率等值线分布由底部向上都呈递增趋势，表明本次试验土壤水分动态变化不受地下水位的影响。
The distributing trend of soil moisture contour map in under soil is rising up from bottom to surface, which indicates that ground water level has no influence on soil moisture variation.
通过生石灰对膨胀土的改性作用，在相同初始含水率的条件下，比较改性前后膨胀力、膨胀率的变化趋势，寻求最佳掺灰率；
The test results indicate: the beginning water content and dried density of expansive soil are the main outside factors that influence the magnitude of their expansibility and swelling quantity;
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