饱和(图论)
岩土工程
多孔性
弹性模量
地质学
饱和度
材料科学
土壤科学
数学
复合材料
土壤水分
组合数学
作者
Shibing Huang,Chen Cai,Shilin Yu,Yingbo He,Xianze Cui
标识
DOI:10.1177/10567895221106241
摘要
Freeze-thaw action of rocks has caused many engineering geological disasters in cold regions. Estimation of the freeze-thaw damage degree and strengths loss of rocks are crucial for the prevention of freeze-thaw disasters. The main aim of this research is to investigate the influence of water saturation on the deterioration of rocks under freeze-thaw and find the best evaluation index. P-wave velocity, elastic modulus and porosity, as the widely used indexes, were adopted to define the freeze-thaw damage variables and predict the UCS loss under freeze-thaw. The change law of these three indexes shows that the critical water saturation for causing a considerable freeze-thaw damage of sandstones is approximately 60%∼80%. P-wave velocity is proved to be a competitive nondestructive parameter, which can be measured easily and correctly without any time-consuming mechanical test. In addition, P-wave velocity can be well used to predict strength loss of rocks under freeze-thaw by performing a statistical analysis of experimental data. It is suggested that the P-wave velocity may be the primary and best index to quantify the freeze-thaw damage degree of rocks with different water saturations comparison with the other two indexes. This study can provide a better understanding of the deterioration of physico-mechanical properties for unsaturated rocks and give a reference for the selection of freeze-thaw evaluation indexes.
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