The tensiometer can measure the suction of soil reliably, and its structure is simple. But it has certain difficulty in monitoring the sectional suction of the soil.
张力计结构简单，能可靠地测量土壤吸力，但是监测土壤的剖面吸力有一定的困难。
Regardless of preventing evaporation or not, soil water suction decreased firstly and then increased with the increase of soil depth, and soil water suction at the same depth increased with time.
无论在隔绝蒸发还是在自然蒸发条件下，短期内土壤水吸力有随土层深度的增加呈先下降后升高的趋势，而同一深度土层水吸力则随时间的推移而升高；
The dilation and softening characteristics of natural expansive soil while shearing under low net mean stress and suction are mainly caused by the evolution of damage structure.
原状膨胀土在吸力和净围压较低时的剪胀和软化特性主要是由于结构损伤的演化引起。
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