尾矿库中新型复合排渗管排渗特征试验研究

刘胜; 王媛; 冯迪

doi:10.11779/CJGE201912023

尾矿库中新型复合排渗管排渗特征试验研究 English Version

刘胜^1,2,
王媛^1,2, ,,
冯迪^1,2

1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210024;
2. 河海大学江苏省岩土工程技术工程研究中心,江苏南京210024

基金项目: 国家重点研发计划项目（2017YFC0804600）

详细信息

作者简介:
刘胜(1994— ),男,博士研究生,主要从事排渗设施淤堵机理及其应对措施等方向的研究。E-mail: liusheng3131@163.com。

通讯作者:
王媛，E-mail：wangyuanhhu@163.com

中图分类号: TU42
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出版历程
- 收稿日期: 2018-11-04
- 发布日期: 2019-12-24

Experimental study on drainage characteristics of new composite drainage pipes in tailings pond

LIU Sheng^1,2,
WANG Yuan^1,2, ,,
FENG Di^1,2

1. Key Laboratory of the Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210024, China;
2. Jiangsu Research Center for Geotechinical Engineering Technology, Hohai University, Nanjing 210024, China

摘要

摘要: 尾矿库中排渗设施的淤堵是常见的现象,也是影响其安全的重要因素。为提高排渗管的排渗能力和抗淤堵性能,开发了一种新型复合排渗管,新型复合排渗管在土工布和排渗花管之间增加了一层格构网。通过室内模型试验,研究格构网的结构和花管开孔率对新型复合排渗管排渗特征的影响,分析了新型复合排渗管的抗淤堵性能,揭示了新型复合排渗管的排渗机理。试验结果表明：外包格构网增加了排渗管的等效开孔面积,优化了排渗管的排渗路径,提高了排渗管的排渗能力。随着花管开孔率的增加,外包格构网对排渗管排渗能力的影响减小。外包格构网提高了排渗管的抗淤堵能力,随着土工布的淤堵,传统外包土工布排渗管和新型复合排渗管的排渗量均有所降低,传统外包土工布排渗管排渗量降低的程度更大。当单向连通格构网的连通方向与排渗管的纵向方向有夹角时,排渗管的排渗能力不增反减。使用单向连通格构网时,须保证格构网的连通方向与排渗管的纵向方向一致。
- 尾矿库 /
- 复合排渗管 /
- 排渗特征 /
- 试验研究
Abstract: The clogging of the drainage facilities in a tailings pond is a common phenomenon, and is also an important factor affecting its safety. In order to improve the drainage capacity and anti-clogging performance of the drainage pipes, new composite drainage pipes are proposed. A layer of lattice net is added between the geotextile and the perforated pipes in the new composite drainage pipes. The indoor model tests are carried out to study the influences of different lattice net structures and opening ratios of the perforated pipes on the drainage characteristics of the new composite drainage pipes. The anti-clogging performance of the new composite drainage pipes is analyzed, and their drainage mechanism is revealed. The results show that the drainage capacity of the composite drainage pipes increases because of larger equivalent opening area and optimized drainage path. With the increase of the opening rate of the perforated pipes, the influences of the lattice net on the drainage capacity of the drainage pipes become smaller. The outsourced lattice network improves the anti-clogging ability of the drainage pipes. With the clogging of geotextiles, the drainage capacities of the ordinary drainage pipes wrapped only with geotextiles and the new composite drainage pipes both decrease, and the reduction of the drainage capacity of the ordinary drainage pipes is more serious. When the connection direction of unidirectional connected lattice net is at an angle with the longitudinal direction of drainage pipes, the drainage capacity of the drainage pipes does not increase but decreases. When using the unidirectional connected lattice net, it is necessary to ensure that the connection direction of the lattice net is consistent with the longitudinal direction of the drainage pipes.
- tailings pond /
- composite drainage pipe /
- drainage characteristic /
- experimental study

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参考文献(17)

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