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土工膜作心墙和铺盖与其作斜墙和铺盖相比可节省工程量，心墙防渗体上游坝坡可以比斜墙上游坝坡陡。能防止冬季冰推坝被引起土工膜的破坏．
The geomembrane for the core wall and bedding cover compared with its oblique walls and bedding can save the amount of engineering, the core wall impervious upstream dam slope slope slope can be steeper than the ramp wall. To prevent winter ice pushed dam caused destruction of geomembrane.