| 蔚成亮,束一鸣,曹明杰,王小东.管袋坝芯砂体沿袋间接缝流失的试验研究[J].水利学报,2014,45(10): |
| 管袋坝芯砂体沿袋间接缝流失的试验研究 |
| Experimental research on core sand losses through seam between tubes of geotube dam |
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| DOI： |
| 中文关键词: 管袋坝 芯砂体 袋间接缝 输移过程 试验研究 |
| 英文关键词: geotube dam core sand seam between tubes transport process experimental research |
| 基金项目: |
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| 摘要点击次数: 1777 |
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| 中文摘要: |
| 采用室内模型试验与图像分析相结合的方法对单向水流作用下管袋坝芯砂体破坏并沿袋间接缝流失的相关问题进行了较为系统的研究。结合颗粒运动特点和水流水力特性变化特点阐明了单向流作用下颗粒输移模式，包括沟槽模式和全断面整体推移模式两种类型；探究了砂箱（坝芯）砂体失稳区域，试验表明砂箱内的砂体失稳区域主要集中在砂箱出口上部倒锥体区域；详尽地分析了颗粒在管路（袋间接缝）中的输移过程和沟槽的形成特点，发现颗粒运动路径主要集中在管路上表面附近区域，输移过程表明颗粒与水流之间的相互作用贯穿砂体破坏及颗粒输移的整个过程；并分析了管路颗粒输移过程中不同颗粒的空间分布特点。 |
| 英文摘要: |
| Combining laboratory model tests and image analysis， a study on the damage of geotube dam and sand losses through the seam between tubes under the action of unidirectional flow is illuminated in this paper. In connection with the characteristics of particle motion and changes of hydrodynamics， the way of sand losses is illustrated， which include two modes， the groove mode and the full-face integral moving mode. The instable region in sand box which used to simulate the dam core is explored. It is shown that the instable region in sand box concentrates in the inverted cone area above the sand box export. The features of particles transport in pipeline which used to simulate seam between tubes and features of the trench formation are analyzed in detail， and it is found that the motion path of particles in the pipeline concentrates in its surface area. The interaction between particles and water exists throughout the process of damage and core sand losses. Meanwhile，the spatial distribution characteristics of different particles are analyzed in the transport process in pipeline. |
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