文档介绍：上海交通大学
硕士学位论文
连续刚构桥施工监控技术应用与研究
姓名:谢伟东
申请学位级别:硕士
专业:建筑与土木工程
指导教师:赵金城;王慧东
20070101
上海交通大学工程硕士学位论文第一章绪论
连续刚构桥施工监控技术应用与研究
摘要
随着我国科学技术和交通事业的发展,近几年预应力混凝土连续
刚构桥以其施工简便、造价经济、受力合理、行车舒适等独特优势得
到了广泛应用。而在预应力混凝土连续刚构桥悬臂施工过程中,己建
成梁段的线形在后期施工中是不可调节的,因此为了保证大桥的顺利
合龙及成桥线形满足设计要求,同时成桥内力控制在设计容许范围
内,必须在桥梁施工过程中进行施工控制工作。
悬臂浇筑桥梁的施工监控主要包括结构线形和结构应力两方面
的内容,必须进行全面跟踪控制才能使桥梁施工顺利进行,达到设计
状态。通过建立大桥结构分析模型,选择合适结构参数识别,充分考
虑各种影响因素,经计算监测、预测,实现大桥线形和应力的不断调
整和控制,达到了预定的目标。
本文以长新高架桥为工程实例,根据大跨径预应力混凝土连续梁
桥的施工控制的特点,提出了合理的施工控制方案,建立了全面的监
测系统。运用这一监测系统,在施工控制过程中,成功采集了施工过
程中结构变位及主要控制断面截面应力等数据,在此基础上,对比分
析实测值与理论值差异,根据最小二乘法正确计算出了桥梁在施工过
程中的阶段预抛高,保证了桥梁顺利合龙,并且在全桥施工完毕,成
桥线形与设计线形误差在允许范围之内。通过理论计算和实测值的比
较,分析在施工阶段,混凝土收缩徐变对桥梁施工控制的影响。
关键词: 连续刚构桥,施工控制,预抛高,徐变,收缩
第 I 页
上海交通大学工程硕士学位论文第一章绪论
APPLICATION AND STUDY OF THE CONSTRUCATION
CONTROL TECHNOLOGY ON CONTINUOUS RIGID BRIDGE
ABSTRACT
With the development of science technology and traffic enterprise in
our country, the prestressed concrete continuous rigid frame bridge has
been growing up rapidly in the recent years with it's unique predominance
of handy construction, economical cost, reasonable internal force and
comfortable traveling. During the cantilever construction of the
prestressed concrete continuous rigid frame bridge, the beam axis shape
of formed blocks can not be regulated during the subsequent
constructions. To ensure the essful closure of the bridge, and make
sure that the axis shape and the internal force of the bridge accord with
the design request, construction control is of great importance during the
bridge construction.
There are two important contents-structure line shape and structure
stress in construction monitoring and controlling of bridge of cantilever
construction. They must be put into practise all-round to making
construction propitious and reaching the design point. after establishing
the analytic model of the bridge, choosing appropriate structure
parameters,