单桩独柱墩多跨连续刚构桥合龙方案与水平顶推力研究  

Closure Scheme and Horizontal Jacking Force of the Single-pile-column Pier Multi-span Continuous Rigid Frame Bridge

作　　者：夏培华[1] 杜松[1] 

机构地区：[1]中交第二航务工程局有限公司长大桥梁施工技术交通行业重点实验室,湖北武汉430014

出　　处：《中国港湾建设》2011年第1期48-51,共4页China Harbour Engineering

摘　　要：结合嘉绍大桥南岸引桥工程实例,开展多跨连续刚构桥合龙方案优化及顶推力取值研究,得出了顶推力估算公式。分析认为七跨一联的连续刚构桥,边跨、中跨、次中跨、次边跨的合龙顺序与常规的边跨到中跨的合龙顺序比较,更有利于改善主梁与桥墩的变形,且能有效地改善桥墩底部的受力。Combining the engineering project of approach bridge in the south of Jiashao Bridge,the research on the closure scheme optimization and the jacking force value of the multi-span continuous rigid frame bridge is carried out,the formulae for estimating the jacking force is obtained.Analysis indicates that the closure order about the sidespan,midspan,infra-midspan,and infra-sidespan,which are the structure of the seven-span continuous girder rigid frame bridge,is better for improving the transforms between girder and pier and can effectively improve the stress of the pier bottom than the traditional closure order from sidespan to midspan.

关 键 词：多跨连续刚构桥 合龙方案 顶推力 水平位移 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]