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Seepage Behavior and Its Control Scheme of Lianghekou Core-wall Rockfill Dam

Fu Yao

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Abstract

The 3-D seepage finite element model of dam site for Lianghekou water project is set up,and the behavior of stable seepage field of dam body and its foundation is calculated and analyzed for water storage period.The equipotential distribution of the seepage field and seepage gradient of dam body and seepage discharge etc are obtained.The effect of the depth and length of impervious curtain of dam foundation and the dam abutment on seepage field is analyzed,and the seepage parameter of impervious curtain and rock mass of dam foundation on seepage field is analyzed too.It is shown that the seepage control scheme of the dam can satisfied with the design code.In addition the proposal that the impervious curtain cut off the bedrock with seepage coefficient large than 3 Lu only is suggested.And for the impervious curtain of left bank the length may be reduced by 50 m.

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What this paper is about

The 3-D seepage finite element model of dam site for Lianghekou water project is set up,and the behavior of stable seepage field of dam body and its foundation is calculated and analyzed for water storage period.The equipotential distribution of the seepage field and seepage gradient of dam body and seepage discharge etc are obtained.The effect of the depth and length of impervious curtain of dam foundation and the dam abutment on seepage field is analyzed,and the seepage parameter of impervious curtain and rock mass of dam foundation on seepage field is analyzed too.It is shown that the seepage control scheme of the dam can satisfied with the design code.In addition the proposal that the impervious curtain cut off the bedrock with seepage coefficient large than 3 Lu only is suggested.And for the impervious curtain of left bank the length may be reduced by 50 m.

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Available abstract

The 3-D seepage finite element model of dam site for Lianghekou water project is set up,and the behavior of stable seepage field of dam body and its foundation is calculated and analyzed for water storage period.The equipotential distribution of the seepage field and seepage gradient of dam body and seepage discharge etc are obtained.The effect of the depth and length of impervious curtain of dam foundation and the dam abutment on seepage field is analyzed,and the seepage parameter of impervious curtain and rock mass of dam foundation on seepage field is analyzed too.It is shown that the seepage control scheme of the dam can satisfied with the design code.In addition the proposal that the impervious curtain cut off the bedrock with seepage coefficient large than 3 Lu only is suggested.And for the impervious curtain of left bank the length may be reduced by 50 m.

Key concepts: Impervious surface, Geotechnical engineering, Abutment, Geology, Foundation (evidence), Bedrock, Engineering, Geomorphology

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Seepage Behavior and Its Control Scheme of Lianghekou Core-wall Rockfill Dam — Research Paper | ScholarLens