摘要
水电工程广泛采用的围堰型式主要包括土石围堰和混凝土围堰。在唐家渡电航枢纽工程施工中,充分考虑土石围堰就地取材、结构简单和施工方便等优点,结合混凝土围堰结构稳定可靠、抗冲刷和防渗效果好等优点,通过对混凝土围堰及土石围堰的改良,最终采用混凝土挡墙与台后回填的组合围堰结构。组合围堰结合土石围堰和混凝土围堰的优点,实现缩短施工工期、保证堰体防渗质量、减少河道污染、易于拆除和降低施工成本等工程目标。
At present,the types of cofferdams widely used in hydropower projects mainly include the earth-rockfill cofferdam and concrete cofferdam.The advantages of earth-rockfill cofferdam are local materials,simple structure and convenient construction.The advantages of concrete cofferdam are stable and reliable structure,anti-scouring and good anti-seepage effect.During the construction of Tangjiadu hydropower and navigation project,through the improvement of concrete cofferdam and earth rock cofferdam,the combined cofferdam structure of concrete retaining wall and back filling behind abutment is adopted to overcome the shortcomings of earth-rockfill cofferdam and concrete cofferdam,so as to shorten the construction period,ensure the anti-seepage quality of cofferdam body,reduce river pollution,facilitate removal and reduce the construction cost.
作者
吴仍芳
WU Rengfang(Road and Bridge Co.,Ltd.of China Gezhouba Group,Yichang 443002,China)
出处
《电力勘测设计》
2022年第9期68-73,共6页
Electric Power Survey & Design
关键词
电航枢纽工程
组合围堰
混凝土挡墙
台后回填
hydropower and navigation project
combined cofferdam
concrete retaining wall
back filling behind abutment
