地震作用下复合土工膜心墙堆石坝应力变形分析
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摘要
复合土工膜心墙堆石坝是为了防止堆石坝渗流和应力变形问题而设计的一种新型坝体。以白龙江某复合土工膜心墙堆石坝为例,建立三维有限元模型,并利用MIDAS/GTS大型岩土分析软件,对正常蓄水期、正常蓄水期加8度地震烈度和无膜情况三种工况下坝体和复合土工膜心墙的应力变形进行了模拟,分析了地震作用下复合土工膜对坝体应力变形的影响。比较发现,复合土工膜在很大程度上抑制了坝体的应力变形。
Geomembrane wall rock-fill dam is a new rock-fill dam to prevent the seepage and stress deformation.A three-dimensional finite element model was developed for a composite geomembrane wall rock-fill dam in Bailongjiang.The large geotechnical analysis software MIDAS/GTS was used to simulate the stress deformation of the composite geomembrane wall rock-fill dam under three working conditions,including the normal storage period,normal storage period with 8-degree earthquake,and normal storage period with 8-degree earthquake but without membrane.The effects of composite geomembrane on the stress deformation of the rock-fill dam were analyzed under earthquake.The results showed that the composite geomembrane restrains the stress deformation of the rock-fill dam.
Geomembrane wall rock-fill dam is a new rock-fill dam to prevent the seepage and stress deformation.A three-dimensional finite element model was developed for a composite geomembrane wall rock-fill dam in Bailongjiang.The large geotechnical analysis software MIDAS/GTS was used to simulate the stress deformation of the composite geomembrane wall rock-fill dam under three working conditions,including the normal storage period,normal storage period with 8-degree earthquake,and normal storage period with 8-degree earthquake but without membrane.The effects of composite geomembrane on the stress deformation of the rock-fill dam were analyzed under earthquake.The results showed that the composite geomembrane restrains the stress deformation of the rock-fill dam.
引文
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[13]陈俊喜,赵鹏飞,郝明.德日苏宝冷水库土工膜心墙堆石坝设计[J].东北水利水电,2012(5).(CHEN Jun-xi,ZHAO Pengfei,HAO Ming.Teilhard de Su Bao cold reservoir geomembrane rockfill dam design[J].Northeast Water Resources and Hydropower,2012(5).(in Chinese))
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[15]谢红强,肖明砾,何江达,等.强震区心墙土石坝地震反应三维非线性分析[J].水力发电学报,2009(5):108-113.(XIE Hong-qiang,XIAO Ming-li,HE Jiang-da,et al.Three-dimensional nonlinear analysis of seismic response for core earthrock dam in meizoseismal area[J].Hydroelectric Engineering Journal,2009(5):108-113.(in Chinese))
[2]GIROUD J P,Morel N,BEECH J F.Stability of geosynthetics on slopes[M].To published in Geotextiles and Geomembranes,1991:165-172.
[3]尚层,李玉建,徐千军,等.复合土工膜不同锚固型式对膜应力变形的影响研究[J].中国农村水利水电,2012(10):72-75.(SHANG Ceng,LI Yu-jian,XU Qian-jun,et al.Different anchorage types of composite geomembrane effect on stress deformation of geomembrane[J].China Rural Water and Hydropower,2012(10):72-75.(in Chinese))
[4]杜善义,王彪.复合材料细观力学[M].北京:科学出版社,1998.(DU Shan-yi,WU Biao.Composite micromechanics[M].Beijing:Science Press,1998.(in Chinese))
[5]柳青祥、罗碧玉.复合土工膜在大坝工程应用中的力学计算探究[J].水利与建筑工程学报,2003(3):43-46.(LIU Qingxiang,LUO Bi-yu.Study of mechanics calculating of comgeomembrane applicating in dam egineering[J].Water and Architectural Engineering,2003(3):43-46.(in Chinese))
[6]DL 507322000,水工建筑物抗震设计规范[S].(DL 507322000,Seismic Sesign of Hydraulic Structures[S].(in Chinese))
[7]顾淦臣.复合土工膜或土工膜堤坝的实例评述(续)[J].水利规划设计,2011(3):65-68.(GU Gan-chen.Dynamic test and modal parameterIdentification of fuziling multi-arch dam[J].Water Resources Planning and Design,2011(3):65-68.(in Chinese))
[8]Gross B A,Bonaparte R,Grioud J P.Evaluation of flow from landfill leskage detection layers[C].Proceeding of the fourth International Conference on Geotextiles,Geomembranes and Relate Products,The Hague,The Netherlands,1990(2):481-486.
[9]吴英杰,申向东,张文怡.哈拉沁水库土石坝静动力分析[J].水力发电,2008(5):38-40.(WU Ying-jing,SHEN Xiang-dong,Zhang Wen-yi.Static and Dynamic Analysis for the Earth-rockfill Dam in Halaqin Reservoir[J].Journal of hydroelectric power,2008(5):38-40.(in Chinese))
[10]Grossmann,S F Sanger.Experience with thermoplastic waterproofing systems in dam construction in the German Democratic republic[C].Proceedings of the 16#Congress on Large Dams,San Francisco,USA,1988,15(61):251-261.
[11]顾淦臣,沈长松,朱展,等.塘房庙复合土工膜心墙堆石坝的设计、施工和应力应变有限元分析[J].水力发电学报,2009,23(l):21-26.(GU Gan-chen,SHEN Chang-song,ZHU Zhan,et al.Design&construction and stress strain analysis by FEM for Tangfangmiao Rockfill Dam with composite geomembrane core[J].Journal of hydroelectric power,2009,23(l):21-26.(in Chinese))
[12]岑威钧,沈长松,童建文.复合土工膜防渗堆石坝力学特性有限元分析[J].水电能源科学,2008.(CEN Wei-jun,SHEN Chang-song,TONG Jian-wen.Anomaly analysis and treatment of hydro-power generator switchgear[J].Water Power Resources and science,2008.(in Chinese))
[13]陈俊喜,赵鹏飞,郝明.德日苏宝冷水库土工膜心墙堆石坝设计[J].东北水利水电,2012(5).(CHEN Jun-xi,ZHAO Pengfei,HAO Ming.Teilhard de Su Bao cold reservoir geomembrane rockfill dam design[J].Northeast Water Resources and Hydropower,2012(5).(in Chinese))
[14]吝江峰.基于FLAC<′3D>的复合土工膜防渗堆石坝三维应力变形研究[D].南京:河海大学,2008.(LING Jiang-feng.A composite geomembrane rockfill dam based on FLAC<3D>three-dimensional stress and deformation[D].Nanjing:Hohai University,2008.(in Chinese))
[15]谢红强,肖明砾,何江达,等.强震区心墙土石坝地震反应三维非线性分析[J].水力发电学报,2009(5):108-113.(XIE Hong-qiang,XIAO Ming-li,HE Jiang-da,et al.Three-dimensional nonlinear analysis of seismic response for core earthrock dam in meizoseismal area[J].Hydroelectric Engineering Journal,2009(5):108-113.(in Chinese))
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