Mechanisms of hydraulic fracturing in cohesive soil |
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| Jun-jie WANG, Hui-ping ZHANG, Ming-jie ZHAO, Xin LIN. 2009: Mechanisms of hydraulic fracturing in cohesive soil. Water Science and Engineering, 2(4): 95-102. doi: 10.3882/j.issn.1674-2370.2009.04.009 |
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| Authors: | Jun-jie WANG Hui-ping ZHANG Ming-jie ZHAO Xin LIN |
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| Affiliation: | 1. School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China;2. Key Laboratory of Hydraulic and Waterway Engineering of Ministry of Education, Chongqing Jiaotong University, Chongqing 400074, P. R. China |
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| Abstract: | Hydraulic fracturing in the soil core of earth-rockfill dams is a common problem affecting the safety of the dams. Based on fracture tests, a new criterion for hydraulic fracturing in cohesive soil was suggested. Using this criterion, the mechanisms of hydraulic fracturing in cubic soil specimens were investigated. The results indicate that the propagation of the crack in a cubic specimen under water pressure occurs in a mixed mode I-II if the crack face is not perpendicular to any of the principal stresses, and the crack most likely to propagate is the one that is perpendicular to the minor principal stress and propagates in mode I. |
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| Keywords: | hydraulic fracturing cohesive soil crack propagation mixed mode I-II |
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