Please wait a minute...
浙江大学学报(工学版)
土木与交通工程     
膨润土泥饼渗透系数及对隔离墙渗透性的影响分析
潘倩, 陈云敏, 李育超, 文一多
1. 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
2. 浙江大学 建筑工程学院 岩土工程研究所,浙江 杭州 310058
Hydraulic conductivity of bentonite filter cake and its impact on permeability of cutoff walls
PAN Qian, CHEN Yun min, LI Yu chao, WEN Yi duo
1. Key Laboratory of Soft Soils and Geoenviromental Engineering, Zhejiang University, Ministry of Education, Hangzhou 310058, China; 
2.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
 全文: PDF(1563 KB)   HTML
摘要:

为了研究防污隔离墙膨润土泥饼的渗透系数,采用美国石油协会(API)压滤试验方法,根据实际工程泥浆沟槽中水压力差范围,测得压滤压力为20~80 kPa工况下膨润土泥饼的渗透系数为4.0×10-10~1.3×10-9 m/s,比在压滤压力为69~690 kPa工况下得到的泥饼渗透系数大1~2个数量级.将得到的泥饼渗透系数应用于分析隔离墙等效渗透性,分析了泥饼渗透系数、泥饼厚度和墙体材料渗透系数对隔离墙渗透性的影响,结果表明:当墙体材料渗透系数较大(大于等于1.0×10-7 m/s)时,隔离墙渗透性主要受泥饼参数控制;隔离墙渗透系数随墙体材料渗透系数的增大而增大,但由于泥饼厚度小且渗透性低,隔离墙渗透系数会趋近于一极限值.

Abstract:

The American Petroleum Institute (API) fluid loss test was applied to investigation of hydraulic conductivity of bentonite cake in cutoff walls. According to the hydraulic pressure in field, 20 kPa to 80 kPa was used in compression pressure to estimate the hydraulic conductivity of bentonite cake. The measured hydraulic conductivity ranged from 4.0×10-10 m/s to 1.3×10-9 m/s, which is 1 to 2 magnitude larger than those obtained at the pressure of 69 kPa to 690 kPa. The hydraulic conductivity of filter cake was applied to analyze the equivalent permeability of cutoff wall. The impacts of hydraulic conductivity,and thickness of filter cake and hydraulic conductivity of backfill on wall permeability were analyzed. It can be concluded that permeability of cutoff wall is controlled by filter cake when the hydraulic conductivity of backfill is high (equal or greater than 1.0×10-7 m/s); the permeability of cutoff wall increases with an increase in hydraulic conductivity of backfill; the wall permeability has a limit due to low thickness and permeability of filter cake.

出版日期: 2017-03-06
CLC:  TU 94  
基金资助:

国家”973”重点基础研究发展计划资助项目(2012CB719800);国家自然科学基金资助项目(51378465);浙江省公益技术应用研究资助项目(2016C31G2010015).

通讯作者: 李育超,男,副教授. ORCID:0000-0002-3636-5007.     E-mail: liyuchao@ zju.edu.cn
作者简介: 潘倩(1988—),女,博士生,主要从事环境岩土工程方面等研究. ORCID:0000-0003-1771-7350. E-mail: panqian@zju.edu.cn
服务  
把本文推荐给朋友
加入引用管理器
E-mail Alert
作者相关文章  

引用本文:

潘倩, 陈云敏, 李育超, 文一多. 膨润土泥饼渗透系数及对隔离墙渗透性的影响分析[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2017.02.002.

PAN Qian, CHEN Yun min, LI Yu chao, WEN Yi duo. Hydraulic conductivity of bentonite filter cake and its impact on permeability of cutoff walls. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2017.02.002.

[1] 陈云敏.环境土工基本理论及工程应用[J].岩土工程学报,2014,36(1): 1-46.
CHEN Yunmin. A fundamental theory of environmental geotechnics and its application [J]. Chinese Journal of Geotechnical Engineering, 2014, 36(1): 1-46.
[2] 张文杰,陈云敏,詹良通.垃圾填埋场渗滤液穿过垂直防渗帷幕的渗漏分析[J].环境科学学报,2008,28(5):925-929.
ZHANG Wenjie, CHEN Yunmin, ZHANG Liangtong. Transport of leachate through vertical curtain grouting in landfills [J]. Acta Scientiae Circumstantiae, 2008, 28(5): 925-929.
[3] FILZ G M, BOYER R D, DAVIDSON R R. Bentonitewater slurry rheology and cutoff wall trench stability [J]. Geotechnical Special Publication, 1997, 71: 139-153.
[4] HENRY L B, FILZ G M, DAVIDSON R R. Formation and properties of bentonite filter cakes [J]. Geotechnical Special Publication, 1998, 78: 69-88.
[5] SOROUSH A, SOROUSH M. Parameters affecting the thickness of bentonite cake in cutoff wall construction: case study and physical modeling [J]. Canadian Geotechnical Journal, 2005, 42(2): 646-654.
[6] NGUYEN T B, LEE C, CHOI H. Slug test analysis in vertical cutoff walls with consideration of filter cake [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2010, 137(8): 785-797.
[7] NGUYEN T B, LEE C, KIM S, et al. Modification of the bouwer and rice method to a cutoff wall with a filter cake [J]. Ground Water, 2010, 48(6): 898-902.
[8] 游朝阳.广州同和地铁站地下连续墙设计与施工关键技术[D].广州: 华南理工大学, 2009.
YOU Chaoyang. Key techniques of diaphram wall design and construction at Tonghe metro station in Guangzhou [D]. Guangzhou: South China University of Technology, 2009.
[9] 杨勇.复合钠基膨润土泥浆护壁机理及其工程应用[J].地下空间与工程学报,2010,6(4): 838-844.
YANG Yong. Stability maintaining mechanism of compound sodiumbased bentonite slurry and its applicationin practical engineering [J]. Chinese Journal of Underground Space and Engineering, 2010, 6(4): 838-844.
[10] 韩晓瑞,朱伟,刘泉维,等.泥浆性质对泥水盾构开挖面泥膜形成质量影响[J].岩土力学,2008,29(S1):288-292.
HAN Xiaorui, ZHU Wei, LIU Quanwei, et al. Influence of slurry property on filter cake quality on working face of slurry shield [J]. Rock and Soil Mechanics, 2008, 29(S1): 288-292.
[11] 韦良文.泥水盾构隧道施工土体稳定性分析与试验研究[D].上海:同济大学, 2007.
WEI Liangwen. Stability analysis of soil body in slurry shield tunneling and test research [D]. Shanghai: Tongji University, 2007.
[12] 王云岗,章光,胡琦.钻孔灌注桩孔壁稳定性分析[J].岩石力学与工程学报,2011,30(S1): 3281-3287.
WANG Yungang, ZHANG Guang, HU Qi. Analysisof stability of bored pile holewall [J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(S1): 32813287.
[13] 时仓艳.钻孔灌注桩孔壁稳定性分析及后压浆应用研究[D].南京:东南大学, 2006.
SHI Cangyan. Analyses on stbaility of bored piles and researeh on it by base postgrouting [D]. Nanjing: Southeast University, 2006.
[14] 陈良.钻井液防塌封堵评价方法及封堵机理研究[D].成都:西南石油大学, 2013.
CHEN Liang. Studies evaluation methods of sealing and sealing mechanism of drilling fluid [D]. Chengdu: Southwest Petroleum University, 2013.
[15] 薛玉志.超低渗透钻井液作用机理及其应用研究[D].青岛:中国石油大学, 2008.
XUE Yuzhi. Study on the interaction mechanisms and application of ultralow permeable drilling fluid [D]. Qingdao: China University Of Petroleum, 2008.
[16] CHUNG J, DANIEL D E. Modied fluid loss test as an improved measure of hydraulic conductivity for bentonite [J]. Geotechnical Testing Journal, 2008, 31(3): 19.
[17] NGUYEN T B, LEE C, LIM J, et al. Hydraulic characteristics of bentonite cake fabricated on cutoff walls [J]. Clays and Clay Minerals, 2012, 60(1): 40-51.
[18] MAHDI F M, HOLDICH R G. Laboratory cake ltration testing using constant rate [J]. Chemical Engineering Research and Design, 2013, 91(6): 1145-1154.
[19] IRITANI E, KATAGIRI N, KANETAKE S. Determination of cake ltration characteristics of dilute suspension of bentonite from various ltration tests [J]. Separation and Purication Technology, 2012, 92: 143-151.
[20] 刘承帅,万洪富,侯梅芳,等.我国主要产地膨润土颗粒组成和蒙脱石含量研究[J].非金属矿,2005,28(1):40-43.
LIU Chengshuai, WAN Hongfu, HOU Mei fang, et al. Study on particle size distribution and montmorillonite content of bentonite in main deposits [J]. NonMetallic Mines, 2005, 28(1): 4043.
[21] 夏新兴,彭毓秀,李忠正,等.膨润土改性方法的研究[J].中国造纸,2003,22(2): 20-23.
XIA Xinxing, PENG Yu xiu, LI Zhong zheng, et al. Modified method of bentonite [J]. China Pulp and Paper, 2003, 22(2): 20-23.
[22] FOX P J, BAXTER C D P. Consolidation properties of soil slurries form hydraulic consolidation test [J]. Journal of Geotechnical and Geoenvironmental Engineering, 1997, 123(8): 770-776.

[1] 杨松松,王梅,杜建安,郭勇,耿炎. 管幕预筑法顶管施工顺序对地表沉降的影响[J]. 浙江大学学报(工学版), 2020, 54(9): 1706-1714.
[2] 钟润辉, 王立忠, 王湛, 王体. 海底取水盾构隧道管片力学性状的数值研究[J]. J4, 2012, 46(4): 672-680.