牡丹桥引桥支座更换方案研究  

Study on Bearing Replacement Plan of Mudan Approach Bridge

作　　者：李杰[1] 陈淮[1] 朱建强 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]河南省交通规划勘察设计院有限责任公司,河南郑州450052

出　　处：《施工技术》2009年第S2期252-256,共5页Construction Technology

摘　　要：以洛阳牡丹桥引桥为研究对象,详细分析引起桥梁支座病害的原因,针对支座更换提出三个方案:逐墩顶升更换;同墩横向同步,纵向分步顶升相邻2个墩;同墩横向同步,纵向分步顶升相邻5个墩。在此基础上利用有限元方法建立梁单元整体模型和实体单元局部模型,就这些支座更换方案进行计算与分析。通过计算可知三个方案均可行,考虑顶升施工的方便、安全等因素,推荐施工时采用方案一逐墩顶升更换支座。For Luoyang Mudan approach bridge,the paper analyzes bearing disease causec in detail.Based on analysis,aiming at bearing replacement,three plans are respectively put forward.The three plans are every pier bearing step by step to be replaced,transverse bearings synchronously and longitudinal adjacent two bearings respectively to be replaced,transverse bearings synchronously and longitudinal adjacent five bearings respectively to be replaced.At last,using finite element method to build Luoyang Mudan approach bridge integrate and partial finite element model,it analyzes and checks replacement plans.Through analysis,it is come to conclusion that the plans of bearing replacement are all feasible.Considering convenience and security of construction,the plan of every pier bearing step by step to be replaced is recommended.

关 键 词：预应力混凝土连续桥梁 V形墩 桥梁加固 支座更换 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]