深水基础的PLC桩围堰设计

围堰作为现代桥梁基坑施工中常见的临时围挡结构被广泛采用，对围堰进行设计研究是确保安全的必要程序。采用PLC桩围堰作为桥墩基础的挡水结构，既增强了锁口钢管桩的止水效果，又能节约钢材、降低施工成本。以海南某景观桥主墩施工时采用的PLC桩围堰为例，对深基坑中的PLC桩围堰进行分析。结合有限元计算方法及理论公式对设计方案进行分析，确保深基坑在施工当中结构的安全性和稳定性。

Design of PLC Pile Cofferdam in Deep Water Foundation

Cofferdam is widely used as a common temporary enclosure structure in the construction of modern bridge foundation pit. It is necessary to design and study cofferdam to ensure the safety. The PLC pile cofferdam is used as the water retaining structure of the pier foundation, which not only enhances the water sealing effect of the locked steel pipe pile, but also saves the steel and reduces the construction cost. Taking the PLC pile cofferdam used in the construction of the main pier of a landscape bridge in Hainan as an example, the PLC pile cofferdam in the deep foundation pit is analyzed. Combined with the finite element method and theoretical formula, the design scheme is analyzed to ensure the safety and stability of the deep foundation pit structure in the construction.