彭市汉江特大桥大体积高强编织袋筑岛围堰施工技术

Retaining Cofferdam Construction Technologies with Bulk Mass High-strength Woven Bags in Han River Grand Bridge of Peng City

结合新建汉宜铁路彭市汉江特大桥主墩施工实例,对采用钢结构平台和抽砂筑岛围堰平台施工方案从工期、成本、难易程度、风险等方面进行比选,阐述了大体积高强编织袋抽砂筑岛围堰施工技术及注意事项。抽砂筑岛围堰在彭市汉江特大桥主墩施工中是比较成功的,不仅节约了成本,也缩短了工期,是一项值得推广的技术。

In light of the main abutment construction practice in Han River Grand Bridge of new Hankou-Yibin Railway, this paper makes a comparison between the steel structure platform and the cofferdam platform by pumping and retaining, from the aspects of construction periods, costs, easiness and risks as to determine which method to be selected, and elabo- rates construction technologies and things needing attentions for the pumping and retaining cofferdam which uses bulk mass woven bags of high strength. Cofferdam platform by pumping and retaining has been quite successful in the construction of major abutments of Han River Grand Bridge since this technology has not only reduced the costs but also shortened con- struction period. Therefore, it is worthy being put into more extensive use.