Abstract：The detailed analyses of the geological conditions of the Xiluodu arch dam foundation under stress- seepage coupling are carried out. Based on field monitoring data，the paper tries to understand the mechanism of seepage coupling in the foundation of Xiluodu dam，where seepage pressure and water level fluctuation are considered. In this paper，the seepage parameters and boundary conditions are determined based on the seepage simulations in combination of field monitoring. The relationship between permeability and stress-deformation is established. By using the nonlinear finite element method，the integrity seepage stability of dam foundation in the typical stages of construction period is numerically studied. Based on the deformations and compressive stresses obtained by numerical simulations and field monitoring data，the seepage state of the dam foundation during construction is obtained. Next，seepage stabilities of dam during operation period are predicted，which may be employed for seepage controlling system of the dam site. Finally，it is noted that the safety and construction quality of the dam during impounding process should be ensured.
[1] 林 鹏，王仁坤，康绳祖，等. 特高拱坝基础破坏、加固与稳定关键问题研究[J]. 岩石力学与工程学报，2011，30(10)：1 945–1 958. (LIN Peng，WANG Renkun，KANG Shengzu，et al. Study on key problems of foundation failure，reinforcement and stability for super high arch dams[J]. Journal of Rock Mechanics and Engineering，2011，30(10)：1 945–1 958.(in Chinese))
[2] 王仁坤，林 鹏，周维垣. 复杂地基上高拱坝开裂与稳定研究[J]. 岩石力学与工程学报，2007，26(10)：1 951–1 958.(WANG Renkun，LIN Peng，ZHOU Weiyuan. Cracking and stability problems of high arch dams on complicated rock foundations[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(10)：1 951–1 958.(in Chinese))
[3] 周维垣. 岩体工程结构的稳定性[J]. 岩石力学与工程学报，2010，29(9)：1 729–1 753.(ZHOU Weiyuan. Structure stability of rock mass engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(9)：1 729–1 753.(in Chinese))
[4] 王仁坤，林 鹏. 溪洛渡拱坝建基面嵌深优化的分析与评价[J]. 岩石力学与工程学报，2008，27(10)：2 010–2 018.(WANG Renkun，LIN Peng. Analysis and evaluation of optimizing design for foundation excavation of Xiluodu superhigh arch dam[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(10)：2 010–2 018.(in Chinese))
[5] WU F Q，LIU T. Excavation unloading destruction phenomena in rock dam foundations[J]. Bulletin of Engineering Geology and the Environment，2009，68(2)：257–262.
[6] 林 鹏，康绳祖，李庆斌，等. 溪洛渡拱坝施工期岩体质量评价与大坝稳定分析[J]. 岩石力学与工程学报，2012，31(10)：2 042–2 052. (LIN Peng，KANG Shengzu，LI Qingbin，et al. Evaluation on rock mass quality and stability of Xiluodu arch dam under construction phase[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(10)：2 042–2 052.(in Chinese))
[7] 田开铭，万 力. 各向异性裂隙介质渗透性的研究与评价[M]. 北京：学苑出版社，1989：7–21.(TIAN Kaiming，WAN Li. Research and evaluation of the permeability of anisotropic fractured media[M]. Beijing：Academy Press，1989：7–21.(in Chinese))
[8] 王洪涛，李永祥. 三维随机裂隙网络非稳定渗流模型[J]. 水利水运科学研究，1997，(2)：139–146.(WANG Hongtao，LI Yongxiang. A three-dimensional theoretical model of transient groundwater flow in stochastic network of fractured rock mass[J]. Journal of Nanjing Hydraulic Research Institute，1997，(2)：139–146.(in Chinese))
[9] 王恩志. 岩体裂隙的网络分析及渗流模型[J]. 岩石力学与工程学报，1993，12(3)：214–221.(WANG Enzhi. Network analysis and seepage model of fractures in rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，1993，12(3)：214–221.(in Chinese))
[10] LONG J C S，REMER J S，WILSON C R，et al. Porous media equivalents for networks of discontinuous fractures[J]. Water Resources Research，1982，18(3)：645–658.
[11] DERSHOWITZ W S，EINSTEIN H H. Characterizing rock joint geometry with joint system models[J]. Rock Mechanics and Rock Engineering，1988，1(1)：21–51.
[12] 刘晓丽，王恩志，王思敬. 裂隙岩体表征方法及岩体水力学特性研究[J]. 岩石力学与工程学报，2008，27(9)：1 814–1 821.(LIU Xiaoli，WANG Enzhi，WANG Sijing. Representation method of fractured rock mass and its hydraulic properties study[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(9)：1 814–1 821.(in Chinese))
[13] 仵彦卿，张倬元. 岩体水力学导论[M]. 成都：西南交通大学出版社，1995：10–20.(WU Yanqing，ZHANG Zhuoyuan. A introduction to rock mass hydraulics[M]. Chengdu：Southwest Jiaotong University Press，1995：10–20.(in Chinese))
[14] 周创兵，陈益峰，姜清辉，等. 复杂岩体多场广义耦合分析导论[M]. 北京：中国水利水电出版社，2008：1–10.(ZHOU Chuangbing，CHEN Yifeng，JIANG Qinghui，et al. Introduction to generalized multifield coupling analysis for complex rock masses[M]. Beijing：China Water Power Press，2008：1–10.(in Chinese))
[15] 周创兵，陈益峰，姜清辉，等. 论岩体多场广义耦合及其工程应用[J]. 岩石力学与工程学报，2008，27(7)：1 329–1 340.(ZHOU Chuangbing，CHEN Yifeng，JIANG Qinghui，et al. On generalized multifield coupling for fractured rock masses and its applications to rock engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(7)：1 329–1 340.(in Chinese))
[16] 赵阳升. 多孔介质多场耦合作用及其工程响应[M]. 北京：科学出版社，2010：1–10.(ZHAO Yangsheng. Multi-field coupling in porous media and its engineering response[M]. Beijing：Science Press，2010：1–10.(in Chinese))
[17] 王 媛，徐志英，速宝玉. 复杂裂隙岩体渗流与应力弹塑性全耦合分析[J]. 岩石力学与工程学报，2000，19(2)：177–181.(WANG
Yuan，XU Zhiying，SU Baoyu. Complete coupled analysis of fluid flow and elastoplastic stress in complicated fractured rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(2)：177–181.(in Chinese))
[18] 速宝玉，詹美礼，王 媛. 裂隙渗流与应力耦合特性的试验研究[J]. 岩土工程学报，1997，19(4)：73–77.(SU Baoyu，ZHAN Meili，WANG Yuan. Experimental study on coupling character of joint seepage and stress[J]. Chinese Journal of Geotechnical Engineering，1997，19(4)：73–77 (in Chinese))
[19] 张玉军，张维庆. 三维双重孔隙–裂隙介质热–水–应力–迁移耦合模型及其有限元分析[J]. 中国科学：技术科学，2010，40(12)：1 426–1 436.(ZHANG Yujun，ZHANG Weiqing. 3D thermo-hydro- mechanical-migratory coupling model and FE analyses for dual- porosity medium[J]. Science China：Technological Sciences，2010，40(12)：1 426–1 436.(in Chinese))
[20] 李立刚. 小浪底大坝基础渗流稳定性分析[J]. 水资源与水工程学报，2007，18(3)：39–41.(LI Ligang. Seepage stability analysis for foundation of Xiaolangdi dam[J]. Journal Water Resources and Water Engineering，2007，18(3)：39–41.(in Chinese))
[21] 谢 红，张家发. 三峡大坝基础渗流控制措施效果分析[J]. 长江科学院院报，1998，15(1)：34–38.(XIE Hong，ZHANG Jiafa. Analysis of effects of TGP dam foundation seepage control system[J]. Journal of Yangtze River Scientific Research Institute，1998，15(1)：34–38.(in Chinese))
[22] 史光前. 隔河岩水利枢纽基础渗流控制[J]. 水力发电，1993，(10)：41–44.(SHI Guangqian. Seepage control of the Geheyan hydro basis[J]. Water Power，1993，(10)：41–44.(in Chinese))
[23] 中国水电工程顾问集团成都勘测设计研究院. 金沙江溪洛渡水电站拱坝建基面工程地质条件[R]. 成都：中国水电工程顾问集团成都勘测设计研究院，2009.(HydroChina Chengdu Engineering Corporation. Geo-condition of foundation interface of Xiluodu arch dam[R]. Chengdu：HydroChina Chengdu Engineering Corporation，2009.(in Chinese))
[24] 薛娈鸾，陈胜宏. 岩石裂隙渗流与法向应力耦合的复合单元模型[J]. 岩石力学与工程学报，2007，26(增1)：2 613–2 619.(XUE Luanluan，CHEN Shenghong. Composite element model of seepage- normal stress coupling for rock fractures[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：2 613–2 619.(in Chinese))
2013, Vol. 32 
