学科：工程地质学 词目：临界孔隙比 英文：critical void ratio 释文：松砂受剪切时体积变小，即孔隙比减小。密砂受剪切时发生剪胀现象，使孔隙比增大。在密砂与松砂之间，总有某个孔隙比使砂受剪切时体积不变，称临界孔隙比。
从松散与密实的概念入手，提出用临界孔隙比等参数判断散料的振动松散与密实效应，并进行了相关的实验研究和理论分析。
Beginning with the concept of loosening and compacting, the paper determines effect of vibration on loosening and compacting of dispersed media using such parameters as critical porosity.
通过动力三轴试验，给出了饱和砂的残余孔隙水压力的全量表达式和不同液化破坏阶段的临界孔隙水压力比的表达式。
Expressions of total residual pore pressure and critical ratio of pore pressure in different failure stages of liquefaction in saturated sand are deduced based on the dynamic tri-axial tests.
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