冻融循环对GCL渗透特性的影响

doi:10.12068/j.issn.1005-3026.2020.07.018

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (7): 1027-1032.DOI: 10.12068/j.issn.1005-3026.2020.07.018

冻融循环对GCL渗透特性的影响

刘志彬¹，刘锋¹，张书建²，白梅¹

(1.东南大学交通学院，江苏南京211189； 2.吉林省高等级公路建设局，吉林长春130062)

收稿日期:2019-08-29 修回日期:2019-08-29 出版日期:2020-07-15 发布日期:2020-07-15
通讯作者: 刘志彬
作者简介:刘志彬(1976-)，男，河北灵寿人，东南大学副教授，博士生导师.
基金资助:
国家自然科学基金资助项目(41877240，41672280)；吉林省交通运输科技项目(2016-1-16-2)；国家重点研发计划项目(2018YFC1802300)；江苏省研究生科研与实践创新计划项目(SJCX18_0052).

Effect of Freeze-Thaw Cycles on Hydraulic Permeability of GCL

LIU Zhi-bin¹， LIU Feng¹， ZHANG Shu-jian²， BAI Mei¹

1. School of Transportation， Southeast University， Nanjing 211189， China; 2. Jilin Provincial High Class Highway Construction Bureau， Changchun 130062， China.

Received:2019-08-29 Revised:2019-08-29 Online:2020-07-15 Published:2020-07-15
Contact: LIU Zhi-bin
About author:-
Supported by:
-

摘要/Abstract

摘要： 为探究土工复合膨润土垫(GCL)在长期冻融循环作用下的防渗性能，以6h的冷冻和6h的融化为冻融周期对GCL进行冻融循环试验，研究了经历不同冻融次数后GCL渗透系数和自由膨胀率的变化规律.试验结果表明:4h内GCL可以达到冻胀稳定状态；GCL经历冻融循环作用后，再经历冻结时易产生不均匀冻胀；GCL在经历较少(≤30次)冻融循环次数情况下，渗透系数随冻融循环次数增加而减小，其最终渗透系数的量级在10^-11~10^-10m/s之间；随着冻融循环次数的增加，GCL中膨润土的自由膨胀率先增大后减小，最后趋于稳定.

关键词: 土工复合膨润土垫, 冻融循环, 渗透特性, 膨润土, 自由膨胀率

Abstract: To analyze the anti-seepage performance of geosynthetic clay liner (GCL) after long-term freeze-thaw cycles， the 6-hour freezing and 6-hour thawing cycle tests on GCL material were carried out. The permeability coefficient and free swelling ratio of GCL after different freeze-thaw cycles were studied. The results show that the frost heave of GCL can reach a stable state within 4h， and when frozen again， differential frost heave can occur in the GCL sample after freeze-thaw cycles. When the number of freeze-thaw cycles is low (≤30times)， the permeability coefficient of GCL decreases with increase of the number of freeze-thaw cycles， and the permeability coefficient is between 10^-11m/s and 10^-10m/s. As the number of freeze-thaw cycles increases， the free swelling ratio of bentonite in GCL increases first， then decreases and finally reaches a steady value.

Key words: GCL(geosynthetic clay liner), freeze-thaw cycle, hydraulic permeability, bentonite, free swelling ratio

中图分类号:

TU57

刘志彬，刘锋，张书建，白梅. 冻融循环对GCL渗透特性的影响[J]. 东北大学学报:自然科学版, 2020, 41(7): 1027-1032.

LIU Zhi-bin， LIU Feng， ZHANG Shu-jian， BAI Mei. Effect of Freeze-Thaw Cycles on Hydraulic Permeability of GCL[J]. Journal of Northeastern University Natural Science, 2020, 41(7): 1027-1032.

参考文献

[1]周正兵，王钊，王俊奇.GCL——一种新型复合土工材料的特性及应用综述［J］.长江科学院院报，2002，19(1):35-38.(Zhou Zheng-bing，Wang Zhao，Wang Jun-qi.An overview about properties and application of a new geocomposite—GCL［J］.Journal of Yangtze River Scientific Research Institute，2002，19(1):35-38.)
[2]Feng S J，Peng M Q，Chen H X，et al.Fully transient analytical solution for degradable organic contaminant transport through GMB/GCL/AL composite liners［J］.Geotextiles and Geomembranes，2019，47(3):282-294.
[3]Hewitt R D，Daniel D E.Hydraulic conductivity of geosynthetic clay liners after freeze-thaw［J］.Journal of Geotechnical and Geoenvironmental Engineering，1997，123(4):305-313.
[4]Rowe R K，Mukunoki T，Bathurst R J.Hydraulic conductivity to jet-A1 of GCLs after up to 100 freeze-thaw cycles［J］.Géotechnique，2008，58(6):503-511.
[5]Makusa G P，Bradshaw S L，Berns E，et al.Freeze-thaw cycling concurrent with cation exchange and the hydraulic conductivity of geosynthetic clay liners［J］.Canadian Geotechnical Journal，2014，51(6):591-598.
[6]中华人民共和国水利部.土工试验方法标准:GB/T 50123—1999［S］.北京:中国计划出版社，1999:10-13.(Ministry of Water Resources of the PRC.Standard for soil test method:GB/T 50123—1999［S］.Beijing:China Planning Press，1999:10-13.)
[7]Qi J，Vermeer P A，Cheng G.A review of the influence of freeze-thaw cycles on soil geotechnical properties［J］.Permafrost and Periglacial Processes，2006，17(3):245-252.
[8]Ghazavi M，Roustaie M.The influence of freeze-thaw cycles on the unconfined compressive strength of fiber reinforced clay［J］.Cold Regions Science and Technology，2010，61(2):125-131.
[9]ASTM International.Standard test method for measurement of index flux through saturated geosynthetic clay liner specimens using a flexible wall permeameter:ASTM D5887/D5887M-16［S］.West Conshohocken:ASTM International，2016:1-8.
[10]ASTM International.Standard test method for swell index of clay mineral component of geosynthetic clay liners:ASTM D5890-19［S］.West Conshohocken:ASTM International，2019:1-7.
[11]严晗，王天亮，刘建坤.粉砂土反复冻胀融沉特性试验研究［J］.岩土力学，2013，34(11):3159-3165.(Yan Han，Wang Tian-liang，Liu Jian-kun.Experimental study of repeated frost heave and thaw settlement properties of silty sand［J］.Rock and Soil Mechanics，2013，34(11):3159-3165.)
[12]Podgorney R K，Bennett J E.Evaluating the long-term performance of geosynthetic clay liners exposed to freeze-thaw［J］.Journal of Geotechnical & Geoenvironmental Engineering，2006，132(2):265-268.
[13]Kraus J F，Benson C H，Erickson A E，et al.Freeze-thaw cycling and hydraulic conductivity of bentonitic barriers［J］.Journal of Geotechnical & Geoenvironmental Engineering，1997，123(3):229-238.
[14]刘志彬，王康达，刘松玉，等.冻融循环对GCL材料中膨润土粒径分布及膨胀指数的影响［J］.东南大学学报(自然科学版)，2015，45(5):964-968.(Liu Zhi-bin，Wang Kang-da，Liu Song-yu，et al.Influence of freeze-thaw cycles on particle size distribution and swell index of bentonite in geosynthetic clay liner［J］.Journal of Southeast University (Natural Science Edition)，2015，45(5):964-968.)
[15]Ghazavi M，Roustaei M.Freeze-thaw performance of clayey soil reinforced with geotextile layer［J］.Cold Regions Science and Technology，2013，89(7):22-29.
[15]关守平，房少纯.一种新型的区间-粒子群优化算法［J］.东北大学学报(自然科学版)，2012，33(10):1381-1384.(Guan Shou-ping，Fang Shao-chun.A new interval particle swarm optimization algorithm［J］.Journal of Northeastern University(Natural Science)，2012，33(10):1381-1384.)

冻融循环对GCL渗透特性的影响

Effect of Freeze-Thaw Cycles on Hydraulic Permeability of GCL

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 6

编辑推荐

Metrics

本文评价

[1]	张景科，刘盾，马雨君，张瀚. 弱胶结砂岩水岩作用机制——以庆阳北石窟为例[J]. 东北大学学报（自然科学版）, 2022, 43(7): 1019-1033.
[2]	武亚军，李俊鹏，姜海波，孔纲强. 不同颗粒级配透明黏土的固结与渗透特性[J]. 东北大学学报:自然科学版, 2020, 41(6): 875-880.
[3]	曾新发，彭振斌，何杰，彭凯. 泥皮条件下土与结构接触面弹塑性本构模型[J]. 东北大学学报:自然科学版, 2014, 35(6): 890-893.
[4]	陈晓龙;孙永升;韩跃新;田泽峰;. 有机膨润土改性沥青的微观结构特性及DSC分析[J]. 东北大学学报(自然科学版), 2012, 33(5): 743-747.
[5]	刘学贵;付建飞;邵红;王恩德;. 一种新型膨润土类建筑密封膏的研究[J]. 东北大学学报(自然科学版), 2008, 29(8): 1192-1195.
[6]	朱一民;王忠安;苏秀娟;魏德洲;. 钙基膨润土对水相中铜离子的吸附[J]. 东北大学学报(自然科学版), 2006, 27(1): 99-102.