| 石化波.考虑裂隙影响的边坡降雨入渗有限元模拟[J].矿产勘查,2024,15(S2):268-272 |
| 考虑裂隙影响的边坡降雨入渗有限元模拟 |
| The FEM numerical infiltration simulation considering fractures effect |
| 投稿时间：2024-06-30 |
| DOI：10.20008/j.kckc.2024s2036 |
| 中文关键词: 降雨入渗 裂隙渗流 边坡稳定性 有限元 数值模拟 |
| 英文关键词: infiltration fracture seepage slope stability FEM numerical simulation |
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| 中文摘要: |
| 降雨是滑坡失稳的常见诱发因素之一，边坡降雨入渗是其稳定性分析的重要基础。本文采用一维 Richards方程描述裂隙中水分运移，二维 Richards方程描述边坡土体渗流，以裂隙与边坡土体流量交换为联系，建立考虑裂隙影响的边坡降雨入渗数值模型。编制相应的计算程序，通过两个数值试验，说明了裂隙显著提高了土体渗透性，与不考虑裂隙影响的结果相比，入渗水量有较大增加，裂隙附近土体的基质吸力降低更为显著，当裂隙位于边坡后缘时，对边坡稳定性极为不利。 |
| 英文摘要: |
| Rainfall is one of the most critical factors which induces the landslide. The infiltration numerical simulation of slope is the foundation of slope stability analysis. In this paper，based on Richards’equation，a new FEM numerical model is created by use of FEM which could solute the seepage field of slope and crack simultane.ously. The exchange flux between above two filed are eliminated to avoid the definition of the flux. Furthermore，a finite element program for numerical simulation corresponding to the above model is coded，and two numerical experiments are carried out. It indicates that fractures improve the permeability of soil significantly is the importantsupply of infiltration. Fractures are important factors which should be considered in infiltration numerical simulation. |
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