Hydraulic connectivity analysis of wrinkle network for 
geomembrane as composite liner

CHEN Cheng; ZHAN Liang-tong; XU Wen-jie; CHEN Yun-min

doi:10.16285/j.rsm.2017.0192

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Hydraulic connectivity analysis of wrinkle network for geomembrane as composite liner

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- Hydraulic connectivity analysis of wrinkle network for geomembrane as composite liner
- Vol. 39, Issue 10, Pages: 3685-3694(2018)
- 作者机构：
  
  1. 浙江大学岩土工程研究所,浙江,杭州,310058
  2. 浙江大学软弱土与环境土工教育部重点实验室,浙江,杭州,310058
  3. 浙江省建筑设计研究院,浙江,杭州,310006
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.0192
  CLC： TU472.2
- Online First：04 November 2018，
  
  Published：2018
- 稿件说明：
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CHEN Cheng, ZHAN Liang-tong, XU Wen-jie, et al. Hydraulic connectivity analysis of wrinkle network for geomembrane as composite liner[J]. 2018, 39(10): 3685-3694.
DOI：

CHEN Cheng, ZHAN Liang-tong, XU Wen-jie, et al. Hydraulic connectivity analysis of wrinkle network for geomembrane as composite liner[J]. 2018, 39(10): 3685-3694. DOI： 10.16285/j.rsm.2017.0192.

摘要

褶皱的水力连通长度是复合褶皱渗漏量评估的关键参数，褶皱网络的水力连通性分析还缺乏客观高效的分析方法。基于对漏洞周围水头分布的简化，提出以搜索长度为标准判定褶皱间水力连通性。通过将褶皱线段化，建立了褶皱网络连通性数字化分析方法，并编制了相应的分析程序，研究了该方法在文献报道的褶皱网络和处于良好状态的GM/GCL（土工膜/土工复合膨润土垫）衬垫中的应用。结果表明：搜索长度的定义给出了判定褶皱间水力连通性的客观标准，能反映衬垫的不同参数（如水头、界面导水系数以及渗透系数等）对褶皱间水力连通性的影响。褶皱线段化使褶皱位置和尺寸的描述更容易，数字化的水力连通分析简便且高效。基于该水力连通性分析方法的渗漏量评估结果偏保守。在进行渗漏量计算时，若假定统一的长度来描述褶皱网络，则需要根据漏洞频率的不同选择不同值。该水力连通性分析方法作为渗漏量评估完全数字化的关键环节，具有重要的应用前景。

Abstract

The hydraulically connected wrinkle length is a crucial parameter for evaluating leakage through composite liner. Rare objective and efficient hydraulic connectivity analysis method for wrinkle network exists. Based on the simplification of head distribution around a hole

search length is proposed as the criterion to determine the connectivity between wrinkles. A digitized hydraulic connectivity analysis method for wrinkle network is proposed by simplifying wrinkles into line segments. The proposed method has been programed and applied to both wrinkle networks reported in the literature and a GM/GCL liner in a good condition. The results indicate that the definition of search length gives an objective criterion for determine the hydraulic connectivity between wrinkles and can reflect the influence of different parameters of the liner (e.g.

hydraulic head

interface transmissivity

hydraulic conductivity

etc.) on the hydraulic connectivity between wrinkles. The location and dimension of a wrinkle are easier described by simplifying wrinkles into line segments. The application of the proposed method is simple and efficient. The results of leakage evaluation based on hydraulic connectivity analysis are conservative. In the process of leakage calculation

the determination of hydraulically connected wrinkle length is dependent on the hole frequency when a unified hydraulically connected wrinkle is used to describe the wrinkle network. The proposed method has a promising application future of acting as a key link of completely digitized leakage evaluation.

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