Facts have revealed that vacuum suction is a natural physical phenomenon in covered Karst areas.
许多事实证明，真空吸蚀作用是覆盖型岩溶地区一种自然物理作用。
Based on the principle of suction, a natural aeration method is proposed for prevention of Karst collapse, which has been tried in some areas in China with satisfactory results.
在真空吸蚀原理的基础上，提出了防治塌陷的自然充气法，在中国某些地区试验效果良好。
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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