| 泡沫流体对堤基土体渗流特性影响分析 |
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| 引用本文： | 邱昊天,王媛,巩佳琨,祁天,张淑君.泡沫流体对堤基土体渗流特性影响分析[J].河海大学学报(自然科学版),2023,51(5):70-78. |
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| 作者姓名： | 邱昊天 王媛 巩佳琨 祁天 张淑君 |
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| 作者单位： | 河海大学力学与材料学院,江苏 南京210098;河海大学水利水电学院,江苏 南京210098 |
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| 基金项目： | 国家自然科学基金资助项目(U2240210,52279098)；江苏省水利科技项目(521049312)；江苏省自然科学基金资助项目(BK20200525) |
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| 摘 要： | 针对泡沫流体对土体渗流的影响机制仍不清晰的问题，开展了室内无泡沫流体渗透破坏试验与泡沫流体抑制渗透破坏试验，对土体渗流特征及泡沫流体对土体渗流的影响进行了研究。试验结果表明：泡沫流体对堤基土体渗流具有显著调控作用，可通过滞留在孔隙中的气泡增大渗流阻力，将局部土体转变为非饱和状态，增强土体抗渗性能；泡沫流体可延长渗流路径，降低水力梯度，抑制土体渗透破坏的发展。
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| 关 键 词： | 堤基土体 渗透破坏 泡沫流体 压力梯度 渗流调控 |
| 收稿时间： | 2023/1/29 0:00:00 |
Effect of foam fluid on seepage characteristic in embankment foundation |
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| QIU Haotian,WANG Yuan,GONG Jiakun,QI Tian,ZHANG Shujun.Effect of foam fluid on seepage characteristic in embankment foundation[J].Journal of Hohai University (Natural Sciences ),2023,51(5):70-78. |
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| Authors: | QIU Haotian WANG Yuan GONG Jiakun QI Tian ZHANG Shujun |
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| Affiliation: | College of Mechanics and Materials, Hohai University, Nanjing 210098, China;College of Water Conservancy & Hydropower Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | The influence mechanism of foam fluid on the seepage in the embankment foundation and the development of embankment seepage failure are unclear. In this study, the seepage failure experiment without foam fluid and the seepage failure experiment with foam fluid are carried out to investigate the characteristics of seepage in soil during the development of seepage failure and the influence of foam fluid on soil seepage. The experimental results show that foam fluid has a significant impact on the seepage in soil. The flow resistance greatly increased by the foam bubble trapped in pores, while the soil is turned to unsaturated state, which leads to the enhanced impervious performance. Besides, the flow path becomes longer due to the existence of foam fluid, which reduces the hydraulic gradient, and in turn significantly restrains the development of seepage failure of the embankment foundation. |
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| Keywords: | embankment foundation seepage failure foam fluid pressure gradient seepage regulation |
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