裂隙诱导各向异性对边坡降雨入渗的影响

袁俊平; 蔺彦玲; 丁鹏; 韩春雷

doi:10.11779/CJGE201601007

裂隙诱导各向异性对边坡降雨入渗的影响 English Version

袁俊平^{1, 2},
蔺彦玲^{1, 2},
丁鹏^{1, 2},
韩春雷^{1, 2}

1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210098;
2. 河海大学岩土工程研究所,江苏南京 210098

基金项目: 国家自然科学基金项目（41172116,U1261212,51134005）; 高等学校博士学科点专项科研基金项目（2013102020016）; 国家自然科学基金项目（51378008）; “十二五”国家科技支撑计划（2011BAB10B04）; 中央科研业务费（B15020060）

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- 收稿日期: 2014-12-23
- 发布日期: 2016-01-19

Influence of anisotropy induced by fissures on rainfall infiltration of slopes

YUAN Jun-ping^{1, 2},
LIN Yan-ling^{1, 2},
DING Peng^{1, 2},
HAN Chun-lei^{1, 2}

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
2. Geotechnical Engineering Research Institute of Hohai University, Nanjing 210098, China

摘要

摘要: 裂隙破坏了土体的完整性,使土体渗透性在不同方向上呈现出明显差异,从而显著地影响了边坡降雨入渗规律。为了揭示裂隙诱导各向异性对边坡降雨入渗的影响规律,利用Seep/W软件进行了数值模拟分析,分别就各向异性方向、各向异性程度、各向异性分布区域等因素进行了讨论。最后结合工程实例分析了计算结果的合理性。结果表明:裂隙诱导各向异性方向、各向异性程度、各向异性分布等因素均对边坡降雨入渗有一定的影响,在边坡排水设计与稳定分析时须予以考虑,降雨强度大于顺裂隙方向渗透系数时,裂隙诱导各向异性的影响才会表现出来。裂隙诱导各向异性主要影响降雨初期渗流场,随降雨历时增大,裂隙诱导各向异性的影响逐渐减小,长历时降雨条件下可不考虑这种影响。
- 裂隙 /
- 各向异性 /
- 边坡 /
- 降雨入渗
Abstract: Fissures destroy the integrity of soil mass, which makes the permeability of soil in different directions vary greatly and thereby significantly affects the rainfall infiltration laws of slopes. In order to reveal the influence of anisotropy induced by fissures on the rainfall infiltration slopes, the software Seep/W is used to conduct a series of numerical simulation analyses, and the factors such as the anisotropic direction, degree of anisotropy and anisotropic distribution are discussed. Finally, based on engineering examples, the rationality of the calculated results are analyzed. It is concluded that the anisotropic direction, degree of anisotropy and anisotropic distribution all have a certain influence on the rainfall infiltration of slopes, and they should be considered in the drainage design and stability analysis of slopes. Only when the rainfall intensity is greater than the permeability coefficient along the direction of the main fractures, the anisotropy induced by fissures will exert an effect. And the anisotropy mainly affects the rainfall infiltration of slopes in the initial period or the slope soil with lower water content, and as the rainfall duration increases to a degree, the influence of the anisotropy on the rainfall infiltration of slopes can be ignored.
- fissure /
- anisotropy /
- slope /
- rainfall infiltration

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参考文献(18)

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裂隙诱导各向异性对边坡降雨入渗的影响 English Version

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Influence of anisotropy induced by fissures on rainfall infiltration of slopes

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