新白沙沱长江特大桥主桥钢梁中跨合龙施工技术探讨  

On Main Girder Midspan Closure Construction Technique of New Baishatuo Yangtze River Bridge

作　　者：王志勇[1] 

机构地区：[1]中铁大桥局集团第一工程有限公司,郑州450053

出　　处：《价值工程》2016年第9期106-108,共3页Value Engineering

摘　　要：新白沙沱长江特大桥为双塔双排双索面、双层铁路钢桁斜拉桥,主跨432m。为尽量减少杆件内力的产生,本桥中跨合龙采用"适配法"的方式进行合龙。根据监控量测数据,严密分析,制定了相关合龙措施,严格按照合龙步骤操作,实现了利用合龙杆件的无应力合龙,为以后类似桥梁的合龙提供了借鉴经验。New Baishatuo Yangtze River Bridge is a twin-tower double-row double cable plane, double railway steel girder cable-stayed bridge with main span of 432 m. In order to reduce member internal force, the midspan closure adopts ＂adaptation method＂. Based on monitoring data and analysis, the closure measures are formulated. The closure steps are strictly followed. Stress free closure with closure bar is realized, which provides reference for similar project in the future.

关 键 词：双塔双排双索面 双层铁路 斜拉桥 无应力合龙 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]