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常德沅水大桥是我省最大的公路桥梁。全长1,410米,主桥长528米,为84+3×120+84米五孔预应力钢筋混凝土、单箱截面的连续梁桥。河岸引桥南七孔、北四孔,均为25m预应力简支梁,市内还有36孔16米预应力空心版梁。主桥墩水下基础采用双壁圆形钢围堰施工。本文主要介绍钢围堰施工中结构的改进、就地制作方法和采用缆索起重机整节吊装和拆除40t钢围堰的工艺流程,供大家参考。
Changde Yuanshui Bridge is the largest highway bridge in our province. The total length of 1,410 meters, the main bridge is 528 meters long, for the 84 +3 × 120 +84 meters five holes prestressed concrete, single box section of continuous beam bridge. The south bank of the approach bridge is seven holes and the north four holes are both 25m prestressed simply supported beams. In addition, there are 36 holes of 16-meter prestressed hollow beam in the city. The main bridge pier underwater foundation with double-wall circular steel cofferdam construction. This article mainly introduces the steel cofferdam construction structure improvement, in-situ production methods and the use of cable crane lifting and removal of 40t steel cofferdam process, for your reference.