高地震烈度地区超宽超大跨斜拉桥主塔基础施工技术应用

Construction Technology Application of Main Tower Foundation of Super Wide and Super Long Span Cable-Stayed Bridge in High Seismic Intensity Area

以通过巴拿马运河第四大桥工程为例,结合项目高地震烈度、大跨等特点,总结了项目东主塔扩大基础和西主塔桩基基础施工技术要点,详细介绍了咬合桩支护、扩大基础施工、栈桥平台设计及施工、锁扣钢管桩围堰施工、桩基及承台施工,为类似高地震烈度地区超宽超大跨斜拉桥主塔基础施工提供参考。

Taking the fourth Panama Canal Bridge project as an example, combined with the characteristics of high seismic intensity and large span, the paper summarizes the key points of the construction technology of the expanded foundation of the east main tower and the pile foundation of the west main tower, and introduces in detail the support of the occluded pile, the construction of the expanded foundation, the design and construction of the trestle platform, the construction of the cofferdam of the locked steel pipe pile, the construction of the pile foundation and the pile cap. It provides a reference for the construction of main tower foundation of super wide and super long span cable-stayed bridge in similar high seismic intensity area.