斜河床面上大型承台的一种施工方法

A Construction Method of Large-sized Base Slab on Inclined Riverbed Surface

跨越大江大河经常采用特大桥型式,桥梁基础大且处于复杂的环境中。以清云高速公路西江特大桥云浮侧主墩承台施工为依托进行分析讨论,摸索出了一种在斜河床面上组织大型承台施工的方法。相比传统的钢板桩围堰结构,提出了采用钢管桩挡土、设置强圈梁和内撑系统,有效克服了斜河床面产生的不均衡土压力,保证了围堰施工安全,可为类似项目提供参考依据。

The extra-large bridge is frequently used to span the big rivers. The bridge foundation is large and is located in the complicated environment. The article analyzes and discusses the construction of the base slab of the main pier for Xijiang River Bridge in Qingyun Expressway. A method to implement the construction of large-sized base slab on the inclined riverbed surface is achieved. Compared with the conventional steel sheet pile cofferdam structure, the use of steel pipe pile to retain soil, and the setup of strong ring beam and inner support system can effectively overcome the imbalanced soil pressure caused by inclined riverbed surface, and guarantee the construction safety of cofferdam, which can be referred for the similar projects.