| 基于单、双重渗透介质降雨边界处理的改进 |
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| 引用本文： | 窦智,刘一民,周志芳,庄超,卫云波.基于单、双重渗透介质降雨边界处理的改进[J].岩土力学,2022,43(3):789-798. |
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| 作者姓名： | 窦智 刘一民 周志芳 庄超 卫云波 |
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| 作者单位： | 河海大学 地球科学与工程学院，江苏 南京 211100 |
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| 基金项目： | 国家重点研发计划项目（No.2019YFC1804303）；;国家自然科学基金项目（No.41877171）~~； |
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| 摘 要： | 在降雨入渗模拟中，现有研究无法准确实现复杂降雨条件下降雨边界在流量与压力两类边界之间的双向动态转换。基于饱和?非饱和渗流理论，将降雨补给流量与实际入渗流量的差值作为两类边界动态转换的判别条件，改进了单重渗透介质降雨边界动态转换控制方程，并进一步提出了双重渗透介质降雨边界处理方法及控制方程，在此基础上进行了数值试验及工程实例验证。结果表明：改进的降雨边界动态转换控制方程克服了传统降雨边界只能实现流量到压力边界单向转换的局限性，可准确实现流量边界与压力边界的双向动态实时转换；案例边坡的降雨入渗模拟结果说明了改进后降雨边界的正确性和工程适用性。
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| 关 键 词： | 降雨边界 双向动态实时转换 单重渗透介质 双重渗透介质 |
| 收稿时间： | 2021-06-07 |
| 修稿时间： | 2021-12-13 |
Improvement of rainfall boundary treatment based on single
and double permeable media |
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| DOU Zhi,LIU Yi-min,ZHOU Zhi-fang,ZHUANG Chao,WEI Yun-bo.Improvement of rainfall boundary treatment based on single
and double permeable media[J].Rock and Soil Mechanics,2022,43(3):789-798. |
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| Authors: | DOU Zhi LIU Yi-min ZHOU Zhi-fang ZHUANG Chao WEI Yun-bo |
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| Institution: | School of Earth Science and Engineering, Hohai University, Nanjing, Jiangsu 211100, China |
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| Abstract: | In the simulation of rainfall infiltration, current studies cannot realize the real-time conversion between the flow boundary and pressure boundary so as to accurately capture the groundwater movement characteristics under complicated rainfall conditions. Based on the saturated-unsaturated seepage theory, the difference between the rainfall recharge flow and actual infiltration flow on the boundary was used as a new judgment condition to distinguish the flow and pressure boundaries. The governing equation of dynamic transformation for the rainfall boundary in the single permeability medium was modified. Furthermore, the treatment method and governing equation were proposed to deal with the rainfall boundary in double permeability media. Numerical experiments and field application were conducted to verify and demonstrate the robustness of the newly proposed approaches. The simulation results suggest that the improved governing equation of dynamic transformation regarding rainfall boundary overcomes the limitations of traditional rainfall boundary processing methods, and can accurately realize the dynamic and real-time conversion between flow boundary and pressure boundary. The simulation results of rainfall infiltration on an in-situ slope illustrate the correctness and engineering applicability of the improved rainfall boundary. |
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| Keywords: | rainfall boundary bidirectional dynamic real-time conversion single permeable medium double permeable medium |
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