永州湘江1号特大桥主墩沉井施工技术

On key pier caisson construction technique of No.1 Super-large bridge of Xiangjiang in Yongzhou

以湘桂铁路扩能改造工程Ⅲ标永州湘江1号特大桥,主桥主墩4号、5号墩基础沉井施工为例,介绍一种水下钻孔爆破法炸礁和就地下沉沉井施工的方法,从而使施工对水域航道的影响降到最低,创造了良好的效益。

Taking No. 4 and No. 5 pier foundation caisson construction with the key pier of No. 1 Super-large bridge of Xiangjiang in Yongzhou of the reconstruction project Ⅲ along Hu＇ nan to Guangxi railway, the paper introduce the underwater drilling blasting method to have the reef explosion and the method for underwater drilling construction method, so as to reduce the construction＇s influence on water areas and channels to create better effect.