| 充填管袋堆积体应力-渗流耦合模型试验 |
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| 引用本文： | 詹美礼,梁洪坤,盛金昌,孙孝安. 充填管袋堆积体应力-渗流耦合模型试验[J]. 水利水电科技进展, 2018, 38(3): 48-53 |
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| 作者姓名： | 詹美礼 梁洪坤 盛金昌 孙孝安 |
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| 作者单位： | 河海大学水利水电学院 |
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| 基金项目： | 国家自然科学基金(51579078,51679070)；中央高校基本科研业务费专项(2015B20514) |
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| 摘 要： | 为探讨充填管袋堤坝管袋堆积体渗透各向异性及应力-渗流耦合关系,采用室内大尺度应力-渗流耦合模型试验,研究了多个管袋搭接形成的堆积体采用不同布置方式时上覆应力对管袋堆积体渗透特性以及渗透各向异性的影响。结果表明:管袋间接缝是堆积体渗流的主要通道,管袋按接缝平行渗流方向布置时,堆积体渗透系数远大于垂直方向布置,且易发生渗透破坏;随上覆应力增加,管袋堆积体的渗透系数逐渐减小,渗透各向异性逐渐增强,但不同布置方式时上覆应力的增加对堆积体渗透性的影响程度不同。
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| 关 键 词： | 充填管袋；堤坝；渗透特性；各向异性；应力-渗流耦合 |
| 收稿时间： | 2017-05-24 |
Model experiments on stress-seepage coupling effect of filled geotubes |
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| ZHAN Meili,LIANG Hongkun,SHENG Jinchang and SUN Xiaoan. Model experiments on stress-seepage coupling effect of filled geotubes[J]. Advances in Science and Technology of Water Resources, 2018, 38(3): 48-53 |
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| Authors: | ZHAN Meili LIANG Hongkun SHENG Jinchang SUN Xiaoan |
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| Affiliation: | College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China,College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China,College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China and College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | In order to investigate the permeability anisotropy and stress-seepage coupling effect of the filled tube assemblage for geotube dams, a large-scale model experiment on stress-seepage coupling was used to study the effect of overburden pressure on the permeability and its anisotropy of the geotube assemblage under different arrangement modes. The experimental results show that the joints between geotubes are the main seepage channel of the assemblage. If the joints between geotubes are arranged parallel to the direction of seepage, the permeability coefficient of the assemblage is much larger than that of the vertical arrangement, and seepage damage is easy to occur. With the increase of the overburden stress, the permeability coefficient of the assembly decreases gradually and the anisotropy of permeability gradually increases. The influence of overburden pressure increase on permeability is different for different arrangement modes. |
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| Keywords: | filled geotubes embankment permeability anisotropy stress-seepage coupling |
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