| 降雨条件下滑坡排水沟排水数值模拟 |
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| 引用本文： | 田东方,刘德富,郑宏,王世梅.降雨条件下滑坡排水沟排水数值模拟[J].岩土力学,2011,32(4):1255-1261. |
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| 作者姓名： | 田东方 刘德富 郑宏 王世梅 |
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| 作者单位： | 三峡大学 水利与环境学院，湖北 宜昌 443002 |
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| 基金项目： | 国家自然基金重点项目，三峡大学青年科学基金 |
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| 摘 要： | 地表排水沟是滑坡治理常见措施之一。在降雨入渗与坡面径流有限元耦合模型中，通过调整径流方程中的坡度参数，实现地表排水沟排水模型。模型具有易于理解、实现简单的优点。以地表排水模型为基础，对5种典型滑坡在设与不设排水沟情况下坡体渗流场、坡面径流场、坡体入渗量和入渗过程进行了数值模拟。结果表明，当降雨强度相对土体渗透性较小时，排水沟设置在坡体渗透性由小变大的位置，才能有效地截断上游径流，减小入渗量；而当降雨强度相对土体渗透性较大时，排水沟排水效果并不明显。
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| 关 键 词： | 降雨入渗 坡面径流 排水沟 数值模拟 滑坡 |
| 收稿时间： | 2010-01-29 |
Numerical simulation of drain on landslide surface under rainfall condition |
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| TIAN Dong-fang,LIU De-fu,ZHENG Hong,WANG Shi-mei.Numerical simulation of drain on landslide surface under rainfall condition[J].Rock and Soil Mechanics,2011,32(4):1255-1261. |
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| Authors: | TIAN Dong-fang LIU De-fu ZHENG Hong WANG Shi-mei |
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| Institution: | College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443002, China |
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| Abstract: | The surface drain is one of the widely used measures in landslides control. Based on the coupling model of infiltration and runoff under rainfall, the drain model of surface drain ditch is realized by adjusting the slope gradients of the runoff control equation. The model is easy to understand and program composition. Furthermore, the seepage field, runoff field, the infiltration capacity and infiltration process are simulated for five typical landslides. The results show that when the rainfall intensity is smaller compared to infiltration rate of the soil, the surface drain should be set in front of the more penetrable slope segment to cut off the runoff in the upper and reduce the infiltration capacity; while the rainfall intensity is larger compared to infiltration rate of the soil, the effect of drain is not evident. |
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| Keywords: | rainfall infiltration slope surface runoff drain numerical simulation landslide |
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