| 防渗墙质量缺陷对土石坝渗流控制的影响 |
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| 作者姓名： | 李少明 |
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| 作者单位： | 杭州市水利规划设计研究院,杭州310016 |
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| 摘 要： | 以吴家园水库大坝为例,采用渗流有限元分析方法,分析混凝土防渗墙的质量缺陷对大坝渗流控制的影响,比如出现裂缝、墙体渗透系数增大、墙体悬挂等情况。分析结果表明,若防渗墙正常,防渗能满足工程安全要求;若防渗墙出现缺陷,则对坝体各部位的渗透坡降都有很大影响。其中防渗墙出现裂缝的位置比裂缝的宽度对渗流控制的影响更大,防渗墙悬挂比墙体渗透系数增大对渗流控制的影响更大。
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| 关 键 词： | 防渗墙 渗流 土石坝 渗透稳定性 吴家园水库 |
Effects of Quality Defects in Anti-seepage Wall on Seepage Control of the Earth-rock Dam |
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| Authors: | LI Shao-ming |
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| Affiliation: | LI Shao-ming(Hangzhou Water Resources Planning and Design Institute,Hangzhou 310016,China) |
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| Abstract: | In this paper,the seepage finite element method is used to investigate the effects of quality defects in the concrete anti-seepage wall on the seepage control of the dam in the Wujiayuan Reservoir.The quality defects include the cracks in the concrete anti-seepage wall,increasing of the permeability coefficient,and suspension of the anti-seepage wall.The results show that if the anti-seepage wall is in good condition,then the seepage control can satisfy the safety requirements of the engineering project;however,if there are defects in the anti-seepage wall,they can have significant effects on the seepage gradient in different parts of the dam.In particular,the location of the crack in the anti-seepage wall has higher effects than the size of the crack on the seepage control,and the anti-seepage wall suspension has higher effects than the increasing of the permeability coefficient on the seepage control. |
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| Keywords: | anti-seepage wall seepage earth-rock dam seepage stability Wujiayuan Reservoir |
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