白鹤滩水电站地下厂区渗流控制数值模拟与评价

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英文篇名：Numerical Simulation and Assessment of Seepage Control on Underground Powerhouse of Baihetan Hydropower Station 作者：程普 ; 万祥兵 ; 方丹 ; 李良权 英文作者：CHENG-Pu;WAN Xiang-bing;FANG-Dan;LI Liang-quan;Huadong Engineering Corporation Limited; 关键词：白鹤滩水电站 ; 地下厂房 ; 防渗排水 ; 渗流控制 ; 数值模拟 英文关键词：Baihetan hydropower station;;underground powerhouse;;anti-seepage and drainage;;seepage control;;numerical simulation 中文刊名：YNSD 英文刊名：Yunnan Water Power 机构：中国电建集团华东勘测设计研究院有限公司; 出版日期：2019-02-15 出版单位：云南水力发电 年：2019 期：v.35;No.175 基金：国家自然科学基金资助项目(51309243) 语种：中文; 页：YNSD201901007 页数：6 CN：01 ISSN：53-1112/TK 分类号：13-18

摘要

白鹤滩水电站工程规模巨大,工程地质及水文地质条件复杂。地下厂房采用首部开发方案,水库蓄水后,围岩渗流特性将成为影响地下厂房围岩稳定和正常运行的重要因素,地下厂区防渗排水问题突出。根据水文地质条件及枢纽布置情况,为改善厂房围岩的渗透稳定性并减小厂区渗漏量,将厂区与大坝防渗排水系统连成整体,采取防渗帷幕、排水孔幕相结合、前后分开布置的渗流控制措施。采用非稳定三维渗流场有限元分析方法,对左岸地下厂区运行期地下水渗流场进行模拟分析。研究结果表明:地下厂区防渗排水系统布置方案总体合理、有效,渗流控制效果显著,满足地下厂房系统的运行要求。
        Baihetan hydropower station is a huge project with complex engineering geological and hydrogeological conditions. The header development scheme is adopted for underground powerhouse. After reservoir impoundment,the seepage characteristics of surrounding rock will be an important factor affecting the stability of surrounding rock and the normal operation of the underground powerhouse. Anti-seepage and drainage are protruding problems of the underground powerhouse. In order to improve the seepage stability of surrounding rock and reduce the leakage of powerhouse, the anti-seepage and drainage system of powerhouse and dam are integrated according to the hydrogeological conditions and the layout of hydropower station. The seepage control measures of combination and separation arrangement of anti-seepage curtain and drainage curtain is taken. The unsteady three-dimensional seepage field finite element analysis method is used to simulate and analyze the groundwater seepage field in the operation period of the underground powerhouse on the left bank. The results show that the layout scheme of anti-seepage and drainage system in underground plant area is reasonable and effective, and the seepage control effect is remarkable,which meets the operation requirements of underground plant system.

引文

[1]赵晓峰,范湘蓉,佘鸿翔,等.溪洛渡水电站地下厂区渗控分析与防渗排水系统设计[J].水电站设计,20l1(4):18~22.
    [2]陈尚法,刘晓刚,牛勇.构皮滩水电站地下厂房区防渗与排水系统设计[J].贵州水力发电,2006,20(3):16~19.
    [3]黄影,赵坚,沈振中.两河口水电站地下厂房渗流控制布置方案研究[J].南水北调与水利科技,2009,7(3):35~37,70.
    [4]苏国韶,符兴义,燕柳斌.流场作用下大型地下厂房围岩稳定性分析[J].地下空间与工程学报,2010,6(4):717~723.
    [5]周永发.地下厂房渗流场及其对围岩稳定的影响[J].水力发电学报,2002(1):37~43.
    [6]陈建余.非稳定饱和-非饱和渗流场数值计算关键技术及其应用研究[D].河海大学,2003.
    [7]郑华康,陈益峰,洪佳敏.地下厂房围岩渗控效应精细模拟与评价[J].天津大学学报:自然科学与工程技术版,2014,47(9):823~828.
    [8]陈益峰,周创兵,毛新莹.水布垭地下厂房围岩渗控效应数值模拟与评价[J].岩石力学与工程学报,2010,29(2):308~318.
    [9]刘武,陈益峰,胡冉,等.基于非稳定渗流过程的岩体渗透特性反演分析[J].岩石力学与工程学报,2015,34(2):362~373.