膨润土防水毯搭接方式渗流特性试验研究

杨旭; 盛金昌; 郑忠巍; 孙永军; 杨慧; 詹美礼; 顾洋

doi:10.11779/CJGE201509014

膨润土防水毯搭接方式渗流特性试验研究 English Version

杨旭¹,
盛金昌^1,,
郑忠巍^{1, 3},
孙永军²,
杨慧²,
詹美礼¹,
顾洋⁴

1. 河海大学水利水电学院,江苏南京 210098; 2. 天津市水利科学研究院,天津 300061; 3. 湖州市吴兴区排涝站,浙江湖州 313000; 4. 西南交通大学力学与工程学院,四川成都 610031

基金项目: 国家自然科学基金项目（51474204）

详细信息

作者简介:
杨旭(1990- ),男,浙江绍兴人,硕士研究生,主要从事水利工程渗流研究。E-mail: sh901@sina.com。

通讯作者:
盛金昌

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出版历程
- 收稿日期: 2014-11-03
- 发布日期: 2015-09-17

Experimental study on seepage properties of GCL with different overlap methods

1. College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China; 2. Tianjin Hydraulic Research Institute, Tianjin 300061, China; 3. Huzhou Wuxing Drainage Station, Huzhou 313000, China; 4. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China

摘要

摘要: 为了从渗流量和渗透稳定角度深入研究膨润土防水毯搭接处的防渗问题,开发了由压力控制系统和模型试验系统两部分组成的具有施加法向应力作用的接触面渗流试验装置,建立了真实模拟设计提出的防水毯铺设工序的渗流搭接物理试验方法,并通过不同工况下的膨润土防水毯搭接渗流试验,初步探讨了搭接处膨润土发挥防渗作用的最佳状态。结果表明：防水毯的搭接宽度宜大于30 cm;搭接处的膨润土添加量最好在4000~5000 g/m²之间选取;取防水毯规格型号为5000 g/m²能满足防渗体的要求;围压大小和加载路径对搭接处的渗透性影响均较大,若围压先增大然后再减小,搭接处仍能保持较为密实,其渗透性变化不大。
- 膨润土防水毯 /
- 搭接 /
- 渗流特性
Abstract: For a thorough research on the GCL overlap anti-seepage problem in terms of seepage flux and seepage stability, an overlap seepage physical test method for the simulation of GCL installation process is established by developing an interface seepage experimental apparatus consisting of pressure control system and model test system under normal stress. The optimization of anti-seepage of the overlap bentonite is preliminarily discussed according to the tests under different conditions. The results show that the GCL overlap width should be more than 30 cm. The amount of bentonite added on the overlap should not be less than 4000 g/m², preferably between 4000~5000 g/m². GCL model specification 5000 g/m²is able to meet the requirements of impervious body. The magnitude of confining pressure and the load path both have great impact on the permeability of the overlap. The overlap remains dense and firm and its permeability changes a little if the confining pressure first increases and then decreases.
- geosynthetic clay liner /
- overlap /
- seepage property

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参考文献(14)

[1]	介玉新, 彭涛, 傅志斌, 等. 土工合成材料黏土衬垫的渗透性研究[J]. 土木工程学报, 2009(2): 92-97. (JIE Yu-xin, PENG Tao, FU Zhi-bin, et al. A study on the permeability of geosynthetic clay liners[J]. China Civil Engineering Journal, 2009(2): 92-97. (in chinese))
[2]	PODGORNEY R K, BENNETTE J E. Evaluating the long-term performance of geosynthetic clay liners exposed to freeze-thaw[J]. Journal of Geotechnical and Geo- environmental Engineering, 2006, 132(2): 265-268.
[3]	LANGE K, ROWE R K, JAMIESON H. The potential role of geosynthetic clay liners in mine water treatment systems[J]. Geotextiles and Geomembranes, 2010, 28(2): 199-205.
[4]	SARI K, CHAI J. Self healing capacity of geosynthetic clay liners and influencing factors[J]. Geotextiles and Geomembranes, 2013, 41: 64-71.
[5]	章美文, 侯毅凯. 坝体防渗设计中膨润土防水毯的应用[J]. 水利水电技术, 2008(1): 49-51. (ZHANG Mei-wen, HOU Kai-yi. Application of geosynthetic clay liner to anti-seepage system in dam body[J]. Water Resources and Hydropower Engineering, 2008(1): 49-51. (in Chinese)) 王涛. 膨润土防水毯实际工程问题及应用进展综述[J]. 施工技术, 2010, 39(增刊1): 401-405. (WANG Tao. Review on engineering problems and application prospect of GCL[J]. Construction Technology, 2010, 39(S1): 401-405. (in Chinese))
[6]	XIE X L, HE F, XU D, et al. Application of large‐scale integrated vertical‐flow constructed wetland in Beijing Olympic forest park: design, operation and performance[J]. Water and Environment Journal, 2012, 26(1): 100-107.
[7]	PAN G, ZHANG Z, LI L, et al. A case study of water retention and ecosystem functioning restoration in Wenying Lake (China)[J]. Lakes & Reservoirs: Research & Management, 2012, 17(3): 185-190.
[8]	曲春珑, 周卉鑫. 膨润土防水毯施工技术的研究与应用[J]. 建筑技术, 2011, 42(7): 590-593. (QU Chun-long, ZHOU Hui-xin. Research and application of bentonite waterproof carpit construction technology[J]. Architecture Technology, 2011, 42(7): 590-593. (in Chinese))
[9]	郝富增, 付立中. 膨润土防水毯在新乡医学院人工湖改造工程中的应用[J]. 中国建筑防水, 2011(10): 34-36. (HAO Fu-zeng, FU Li-zhong. Application of bentonite carpet in renovation of man-made lake of Xinxiang Medical University[J]. China Building Waterproofing, 2011(10): 34-36. (in Chinese))
[10]	汪武, 李爱军. 福州档案馆新馆人工湖工程防水技术[J]. 中国建筑防水, 2012(10): 27-29. (WANG Wu, LI Ai-jun. Waterproofing technology of artificial lake project of Fuzhou New Archives [J]. China Building Waterproofing, 2012(10): 27-29. (in Chinese))
[11]	ESTORNELL P, DANIEL D E. Hydraulic conductivity of three geosynthetic clay liners[J]. Journal of Geotechnical Engineering, 1992, 118(10): 1592-1606.
[12]	BENSON C H, JO H Y, ABICHOU T. Forensic analysis of excessive leakage from lagoons lined with a composite GCL[J]. Geosynthetics International, 2004, 11(3): 242-252.
[13]	BRACHMAN R W I, JOSHI P, ROWE R K, et al. Physical response of geomembrane wrinkles near GCL overlaps[C]// Geo-Frontiers 2011:Advances in Geotechnical Engineering. ASCE, Dalls, 2011: 1152-1161.
[14]	EGLOFFSTEIN T A, KALSOW J, VON MAUBEUGE K P, et al. Multi-component geosynthetic clay liners: A product with new possibilities[C]// Current and Future Practices for the Testing of Multi-Component Geosynthetic Clay Liners. ASTM, 2013: 1-14.