CAJ | 학술논문

抽水蓄能电站上水库坝体和库盆的变形会影响其防渗结构和效果。某抽水蓄能电站上水库大坝为混凝土面板堆石坝，库底平台利用复合土工膜防渗。针对该坝体和库盆，建立三维非线性有限元模型，模拟坝体和库底回填料的施工填筑过程及水库蓄水过程，分析了蓄水期坝体、库底回填料和土工膜的变形应力情况，论证了该库结构设计的合理性。计算结果表明，蓄水期坝体的位移分布规律性较好，应力分布合理；土工膜的安全系数满足规范要求，选型合理；土工膜能较好地适应回填料的变形，不会出现脱空现象；在库盆中回填料与基岩的分界区，土工膜的法向位移等值线梯度较大，拉应力也较大，需要重点关注。
추수축능전참상수고패체화고분적변형회영향기방삼결구화효과。모추수축능전참상수고대패위혼응토면판퇴석패，고저평태이용복합토공막방삼。침대해패체화고분，건립삼유비선성유한원모형，모의패체화고저회전료적시공전축과정급수고축수과정，분석료축수기패체、고저회전료화토공막적변형응력정황，론증료해고결구설계적합이성。계산결과표명，축수기패체적위이분포규률성교호，응력분포합리；토공막적안전계수만족규범요구，선형합리；토공막능교호지괄응회전료적변형，불회출현탈공현상；재고분중회전료여기암적분계구，토공막적법향위이등치선제도교대，랍응력야교대，수요중점관주。
The deformation of dams and reservoir basin of upper reservoir at the pumped storage power station can affect the an-ti-seepage structure and effects .The dam of upper reservoir at a pumped storage power station is a concrete faced rockfill dam and the impermeable material of reservoir bottom is composite geo-membrane .Aiming at the dam and the reservoir basin ,the 3-D non-linear finite element model was developed to simulate the filling process of the dam and backfill and the storage process of the reservoir .The deformation and stress of the dam ,backfill ,and composite geo-membrane were analyzed ,and the rationality of the structural design was demonstrated .The results showed that the displacement distribution and stress distribution of the dam were reasonable .The option on composite geo-membrane was reasonable as the safety factors met standard requirements .The composite geo-membrane can adapt to the deformation of the backfill very well without the occurrence of disengaging phenome-non .Emphasis should be put in the dividing area of backfill and bedrock as the gradient of the normal displacement equipotential line of composite geo-membrane was large and tensile stress was high .