| 裂隙面对强膨胀土抗剪强度影响分析 |
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| 引用本文： | 赵 鑫,阳云华,朱瑛洁,张良平,麻 斌.裂隙面对强膨胀土抗剪强度影响分析[J].岩土力学,2014,35(1):130-133. |
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| 作者姓名： | 赵 鑫 阳云华 朱瑛洁 张良平 麻 斌 |
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| 作者单位： | 长江岩土工程总公司（武汉），武汉 430010 |
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| 基金项目： | 国家“十二五”科技支撑计划课题(No. 2011BAB10B02)。 |
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| 摘 要： | 膨胀土作为一种特殊性土,其抗剪强度取值不同于一般的黏性土。实践证明,在进行膨胀土边坡设计时,不仅要考虑土体的土块强度,而且也要考虑裂隙面强度,其抗剪强度在很大程度上受其裂隙面规模与产状的影响,尤其是对裂隙极发育的强膨胀土而言。为了更加真实地模拟强膨胀土在裂隙面控制下的剪切破坏,特在南水北调中线工程南阳段强膨胀土地段进行大剪试验,通过拟合试验数据,对强膨胀土抗剪强度影响因素进行分析。结果表明,裂隙面的发育程度、倾角、裂面的起伏程度都对强膨胀土的抗剪强度有着很大的影响。
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| 关 键 词： | 强膨胀土 抗剪强度 裂隙面 |
| 收稿时间： | 2012-10-09 |
Analysis of impact of crack surface on shear strength of strong expansive soil |
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| ZHAO Xin,YANG Yun-hua,ZHU Ying-jie,ZHANG Liang-ping,MA Bin.Analysis of impact of crack surface on shear strength of strong expansive soil[J].Rock and Soil Mechanics,2014,35(1):130-133. |
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| Authors: | ZHAO Xin YANG Yun-hua ZHU Ying-jie ZHANG Liang-ping MA Bin |
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| Institution: | Changjiang Geotechnical Engineering Corporation, Wuhan 430010, China |
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| Abstract: | Expansive soil as a kind of special soil, its shear strength value is different from the common cohesive soil. In practice, it is proved that in the design of expansive soil slope, not only the soil block strength, but also the crack surface strength must be considered. It is impacted by the crack surface scale and occurrence, in particular, to the strong expansive soil which grows extremely crack surface. In order to simulate more realistic shear failure of strong expansive soil under the control of the crack surface, the in-situ direct shear experiment of strong expansive soil for South-to-North Water Transfer Project in Nanyang section is made; through matching the data of strong expansive soil, and shear strength influencing factors are analyzed. The results show that all of the crack surface development degree, the slope angle and the crack surface fluctuation degree have great influences on the strong expansive soil shear strength. |
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| Keywords: | strong expansive soil shear strength crack surface |
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