全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
-  2018 

坝基帷幕防渗性能衰减的数值模拟 Numerical simulation of anti-seepage performance attenuation of dam curtain

Keywords: 帷幕,防渗性能,多场耦合模型,细观结构

Full-Text   Cite this paper   Add to My Lib

Abstract:

大坝长期运行条件下,帷幕受到坝基水的侵蚀作用,其矿物组成的溶失使得帷幕细观结构发生改变,进而引起防渗性能衰减,可能造成渗流安全隐患.为反映帷幕防渗性能衰减机理及其造成的影响,依据地下水动力学、溶质运移以及化学动力学的相关理论,建立了渗流场、化学场以及固相介质细观结构等多物理场耦合的数学模型,以帷幕中的主要组成Ca(OH)2作为目标矿物,研究其溶失引起的帷幕自身孔隙度和防渗性能改变以及对渗流等的影响.模拟结果表明,模型能较好地反映帷幕细观结构改变发生的部位及其程度.同时,模型还可预测由于防渗性能衰减而引起的渗流量的增加以及幕后目标离子浓度的变化

References

[1]  许孝臣,盛金昌,何淑媛,等.防渗帷幕随机缺损的模拟及对坝基渗流的影响[J].河海大学学报:自然科学版,2009,37(5):582-585.Xu Xiaochen,Sheng Jinchang,He Shuyuan,et al.Simulation of random damage of grouting curtain and its influence on seepage flows in dam foundation[J].Journal of Hohai University(Natural Sciences),2009,37(5):582-585.
[2]  Trotignon L,Didot A,Bildstein O,et al.Design of a2-D cementation experiment in porous medium using numerical simulation[J].Oil&Gas Science and Technology,2005,60(2):307-318.
[3]  Huo J X,Song H Z,Wu Z W.Multi-component reactive transport in heterogeneous media and its decoupling solution[J].Journal of Contaminant Hydrology,2014,166(28):11-22.
[4]  Cochepin B,Trotignon L,Bildstein O,et al.Approaches to modelling coupled flow and reaction in a 2Dcementation experiment[J].Advances in Water Resources,2008,31(12):1540-1551.
[5]  李新宇,方坤河.混凝土渗透溶蚀过程中钙离子迁移过程数值模拟[J].长江科学院院报,2008,25(6):96-100.Li Xinyu,Fang Kunhe.Numerical simulation of Caion transportation during concrete leaching dissolution[J].Journal of Yangtze River Scientific Research Institute,2008,25(6):96-100.
[6]  廖华胜,高明军,李连侠.沙湾水电站左岸坝肩“地窗式”防渗方案优化计算与分析[J].四川大学学报(工程科学版),2005,37(4):1-6.Liao Huasheng,Gao Mingjun,Li Lianxia.Optimal simulation and analyzing to“lower window”type seepage control scheme in left abutment of Shawan hydropower station[J].Journal of Sichuan University(Engineering Science Edition),2005,37(4):1-6.
[7]  霍吉祥,宋汉周,彭鹏,等.水化学图示法及其在坝基帷幕体防渗性能评价中的应用[J].水力发电学报,2011,30(5):73-79.Huo Jixiang,Song Hanzhou,Peng Peng,et al.Hydrochemistry diagrams and their application for assessing anti-seepage behavior of dam foundation curtain[J].Journal of Hydroelectric Engineering,2011,30(5):73-79.
[8]  Steefel C I,Lasaga A C.A coupled model for transport of multiple chemical species and kinetic precipitation/dissolution reactions with application to reactive flow in single phase hydrothermal systems[J].American Journal of Science,1994,294:529-592.
[9]  彭鹏,单治钢,王永明,等.基于饱和指数模型的坝基帷幕体防渗效果及耐久性研究[J].岩土力学,2013,34(1):221-226.Peng Peng,Shan Zhigang,Wang Yongming,et al.Anti-seepage effect of curtain under dam foundation and its durability based on saturation index model[J].Rock and Soil Mechanics,2013,34(1):221-226.
[10]  Schiopu N,Tiruta-Barna L,Jayr E,et al.Modelling and simulation of concrete leaching under outdoor exposure conditions[J].Science of the Total Environment,2009,407:1613-1630.
[11]  杨永祥,徐建光,郭张军.坝基帷幕体防渗效果及其时效多指标评价体系研究[J].西安理工大学学报,2008,24(4):455-461.Yang Yongxiang,Xu Jianguang,Guo Zhangjun.Study on the multi-indel evaluation system in antiseepage performance and time effectiveness of dam foundation curtain-grouting[J].Journal of Xi'an University of Technology,2008,24(4):455-461.
[12]  彭鹏,单治钢,宋汉周,等.反映坝基帷幕体防渗时效的多场耦合数值模拟[J].岩土工程学报,2011,33(12):1847-1853.Peng Peng,Shan Zhigang,Song Hanzhou,et al.Coupling model for assessing anti-seepage behaviors of curtain of dam foundation[J].Chinese Journal of Geotechnical Engineering,2011,33(12):1847-1853.
[13]  徐建伟,徐青.灌浆帷幕耐久性数值仿真分析[J].武汉大学学报(工学版),2016,49(2),206-211.Xu Jianwei,Xu Qing.Numerical simulation analysis of durability of grouting curtain[J].Engineering Journal of Wuhan University,2016,49(2),206-211.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133