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。
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.
作者
陈成
詹良通
徐文杰
陈云敏
CHEN Cheng;ZHAN Liang-tong;XU Wen-jie;CHEN Yun-min(Institute of Geotechnical Engineering,Zhejiang University,Hangzhou,Zhejiang 310058,China;Key Laboratory of Soil Soils and Geoenvironmental Engineering of Ministry of Education,Zhejiang University,Hangzhou,Zhejiang 310058,China;Zhejiang Province Institute of Architectural Design and Research,Hangzhou,Zhejiang 310006,China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2018年第10期3685-3694,共10页
Rock and Soil Mechanics
基金
国家自然科学基金(No.51378466
No.51508504)~~
关键词
复合衬垫
褶皱
水力连通分析
渗漏量
composite liner
wrinkle
hydraulic connectivity analysis
leakage
