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在海、河中修建大桥,桥墩深水基础施工通常有土围堰、钢套箱、钢板桩围堰等三种方案,这三种方案各有优缺点。土围堰方案虽然投资少,施工难度小,简单、易行,但其用土量大,易堵塞河道,抗冲刷能力弱,不可回收。钢套箱方案虽然安全、可靠,工艺成熟,但投资大,不易操作,设备要求多,工期长,回收率低。钢板桩围堰方案虽然比较简便、易行,安全性优于土围堰,投资小于钢套箱,回收率高,但一
In the sea, the river to build bridges, pier deep foundation construction usually soil cofferdam, steel box, steel sheet cofferdam three kinds of programs, these three programs have their own advantages and disadvantages. Although the earth cofferdam project is less investment, construction difficulty is small, simple, easy, but its large amount of soil, easy to plug the river, anti-erosion ability is weak, can not be recycled. Although the steel box mesa program safe, reliable, mature technology, but the investment, not easy to operate, equipment and more long duration, low recovery rate. Although the scheme of steel sheet pile cofferdam is simple, easy and safe, it is better than earth cofferdam, the investment is less than that of steel box, the recovery rate is high, but one