南京长江第四大桥北锚碇工程施工关键技术

摘要

南京长江第四大桥北锚碇为重力式锚碇，大体积混凝土结构，在国内悬索桥中首次采用了分布式锚固系统。本文详细介绍了北锚碇工程施工中大体积混凝土温度控制技术、锚固系统安装施工技术以及高精度测量定位关键技术。%North anchorage of the Fourth Nanjing Yangtze River Bridge is a kind of gravity anchor. Distributed mortise-tenon anchor system of Reinforced Concrete is designed for its anchor system structure first time in China. Thermal stress and temperature control is the key technique in large mass concrete construction of this anchorage. This article will introduce large mass concrete temperature control method,anchor system fixing technology and high-accuracy survey technology of North anchorage of the Fourth Nanjing Yangtze River Bridge.