首页 > 过刊浏览>2022年第42卷第4期 >45-50. DOI:10.3880/j.issn.1006-7647.2022.04.008
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土工膜防渗低水头平原水库渗流场及膜体稳定性
作者:
作者单位:

(1.河海大学水利水电学院,江苏 南京210098;2.南京水利科学研究院水工水力学研究所,江苏 南京210029;3.广东省水利电力勘测设计研究院有限公司,广东 广州510635)

作者简介:

甘磊(1987—),男,教授,博士,主要从事工程渗流分析研究。E-mail:ganlei2015@hhu.edu.cn

中图分类号:

TU44

基金项目:

国家自然科学基金


Seepage field and membrane stability of a low-head plain reservoir with geomembrane anti-seepage measures
Author:
Affiliation:

(1.College of Water Conservancy and Hydropower Engineering, Hohai University,Nanjing 210098, China;2.Hydraulic Engineering Department, Nanjing Hydraulic Research Institute,Nanjing 210029,China;3.Guangdong Hydropower Planning & Design Institute Co., Ltd., Guangzhou 510635,China)

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    摘要:

    针对平原水库土工膜稳定及渗漏等问题,结合珠江三角洲某土工膜防渗平原水库实际工程,建立渗流有限元模型,模拟施工和运行过程中土工膜破损和缺陷情况,分析土工膜缺陷对库底土工膜膜体稳定性和渗漏量的影响。结果表明:平原水库库内未储水时,土工膜缺陷对平原水库渗流场和库底土工膜稳定性的影响甚微；当库内及外江水位均处于高水位时,缺陷处膜下压力水头最大,但土工膜仍可维持稳定；当土工膜缺陷距离排水盲管30.m,且缺陷孔径为0.5~3.0.cm时,孔径变化对缺陷处渗漏量的影响较小,但缺陷数量和位置对缺陷处总渗漏量影响显著。

    Abstract:

    Aiming at the prominent problems of stability and leakage of geomembrane in plain reservoirs, a seepage finite element model was established in combination with a practical project of a plain reservoir with geomembrane in the Pearl River Delta. The damage and defects of geomembrane during construction and operation were simulated to analyze the influence of geomembrane defects on the seepage stability and leakage at the bottom of the reservoir. The results show that when there is no water in the plain reservoir, the geomembrane defects have little influence on the seepage field and the stability of the geomembrane at the bottom of the plain reservoir. When the water level inside the reservoir or in the outside river is in a high level, the pressure head under the defect membrane is the highest, but the geomembrane can still be stable. When the geomembrane defect is 30 m away from the blind drainage pipe and the diameter of the defect hole is 0.5 to 3.0 cm, the diameter variation of the defect hole has little effect on the leakage. However, the number and location of defects have a significant influence on the total leakage. Keywords: plain reservoir; geomembrane; defects; seepage field 〖FL

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甘磊,刘静楠,谭海劲,等.土工膜防渗低水头平原水库渗流场及膜体稳定性[J].水利水电科技进展,2022,42(4):45-50.(GAN Lei, LIU Jingnan, TAN Haijin, et al. Seepage field and membrane stability of a low-head plain reservoir with geomembrane anti-seepage measures[J]. Advances in Science and Technology of Water Resources,2022,42(4):45-50.(in Chinese))

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  • 收稿日期:2021-06-23
  • 在线发布日期: 2022-07-07

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