某水电站河床坝基覆盖层渗透稳定性研究

长江科学院院报 ›› 2011, Vol. 28 ›› Issue (6): 45-49.

某水电站河床坝基覆盖层渗透稳定性研究

王志红¹ ，任光明¹ ，赵海营² ，刘艳领²

1. 成都理工大学地质灾害防治与地质环境保护国家重点实验室，成都 610059 ； 2. 中国水电顾问集团西北勘测设计研究院，兰州 730050

出版日期:2011-06-01 发布日期:2012-11-08

Seepage Stability Analysis for the Overburden Layer of Dam Foundation at a Hydropower Station

WANG Zhi-hong¹ , REN Guang-ming¹ , ZHAO Hai-ying² , LIU Yan-ling²

1.State Key Laboratory of Geological Hazard Prevention and Geological Environment Protection,  Chengdu University of Technology, Chengdu 610059, China ；  2.Northwest Investigation Design and Research Institute, Gansu 730050, China

Online:2011-06-01 Published:2012-11-08

摘要/Abstract

摘要： 根据某水电站河床坝基覆盖层的工程地质特性和水文地质特点，通过现场和室内试验获得水文地质参数，初步判定渗透变形类型。再基于水文地质参数和渗流理论，建立坝基覆盖层的三维数值计算模型，得到渗流场和水力梯度特征，进而分析不同工况下库水通过覆盖层的渗漏量。在此基础上，通过分析不同工况下水力坡降的模拟计算结果，评价了坝基的渗透稳定性问题，与初判的结果进行比对，得出最终结论，为大坝的防渗处理提供合理依据。

关键词: 覆盖层 , 渗漏量 , 渗透稳定性 , 水文地质模型 , 水力坡降

Abstract: The seepage stability of the overburden layer of a dam foundation is studied in this paper to provide basis for seepage control for the dam. Firstly, according to the geologic and hydrogeologic characteristics of the dam foundation overburden layer, the seepage deformation type is preliminarily estimated based on hydrogeological parameters obtained from site and indoor tests. A 3-D numerical model of the overburden layer is subsequently built to get the characteristics of seepage field and hydraulic gradient based on the above parameters and seepage theory so as to analyze the leakage amount of reservoir water permeating through the overburden layer under different operation conditions. In view of the above study, the simulation results of hydraulic gradient under different conditions are analyzed to assess the seepage stability of the dam foundation, which is further compared with the preliminary estimate so that the final conclusion can be derived.

Key words: overburden layer, , leakage amount , , seepage stability , hydro-geologic model , hydraulic gradient ,

中图分类号:

TV233.6

王志红，任光明，赵海营，刘艳领. 某水电站河床坝基覆盖层渗透稳定性研究[J]. 长江科学院院报, 2011, 28(6): 45-49.

WANG Zhi-hong , REN Guang-ming , ZHAO Hai-ying , LIU Yan-ling . Seepage Stability Analysis for the Overburden Layer of Dam Foundation at a Hydropower Station [J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2011, 28(6): 45-49.

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