长河坝水电站上游过水围堰堰面防护方式试验研究

Small Hydro Power(2015)

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Abstract
长河坝水电站过水围堰在初期过流时基坑为干地状态且基坑壅水时间较长,上游围堰上下游水位差大,因而适当的堰面防护方式是确保过水围堰顺利度汛的制约因素.试验比较了3种上游围堰堰面防护方式,量测了上游围堰范围内水力学特性指标,检验了上游围堰的过流稳定状况.试验表明:在堰面防护材料与垫层料之间设置防冲透水材料(如网状土工织物),可以防止水流淘刷堰体料,有效地增强上游围堰的过流稳定性;上游围堰度汛安全可得到保证.图3幅,表1个
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