大跨径PC连续刚构桥施工监测控制分析

发布时间：2018-05-09 05:50

本文选题：连续刚构桥 + 施工监测与控制　；参考：《重庆交通大学》2015年硕士论文

【摘要】：本文根据李家堡3#大桥,跨径布置:65+3×120+65 m的多跨悬浇预应力混凝土连续刚构桥,结合桥梁博士3.0有限元计算分析软件对该桥的结构线形和控制截面内力进行计算分析、复核。将桥梁施工监测控制手段与挂篮悬臂施工相结合,配合施工阶段中的实测参数混凝土弹性模量E、管道摩阻系数u、管道偏差k等,对有限元分析模型进行实时动态的修整。确保李家堡3#大桥在挂篮悬臂施工阶段的结构线形和截面控制应力符合施工设计文件、规范和标准的要求。本文结合李家堡3#大桥主要研究了以下内容:(1)桥梁施工监测与控制是桥梁施工技术的重要组成部分。从对有限元计算模型与实测数据之间的误差的分析、识别、调整、预测来说明桥梁施工监控的重要性和必要性。(2)从李家堡3#大桥的施工监控方案入手,对多跨悬浇预应力混凝土连续刚构桥的施工控制的方法、施工监控的原则以及施工监控的技术流程进行分析。主要分析了开环控制法、闭环控制法以及自适应监控方法,并指出PC连续刚构桥的施工监控要灵活多变的结合多种分析理论,有效的控制结构的线形和应力的发展。(3)结合施工控制理论,对李家堡3#大桥进行设计复核计算和施工控制计算。分别对立模标高控制理论、影响因素、计算公式以及预拱度的设置曲线等进行对比分析。(4)针对多跨悬浇PC连续刚构桥挂篮悬臂施工的特殊阶段:T构施工的最大悬臂阶段、中跨合拢阶段、全桥二期铺装和全桥10年运营阶段,对比并分析了对应桥梁结构的线形和控制截面的应力,为李家堡3#大桥挂篮悬臂施工的顺利合拢和结构线形和截面控制应力满足设计文件及相关规范的要求贡献了力量。
[Abstract]:In this paper, according to the structure of Lijiapu2# Bridge, a multi-span prestressed concrete continuous rigid frame bridge with overpass of 65 3 脳 120 m is arranged, and the linear structure and internal force of control section of the bridge are calculated and analyzed in combination with the finite element calculation and analysis software of the bridge doctor 3.0, and the internal forces of the control section are calculated and checked. The bridge construction monitoring and control means are combined with the cantilever construction of the hanging basket, and the finite element analysis model is trimmed in real time and dynamic with the measured parameters of concrete elastic modulus E, pipeline friction coefficient u, pipeline deviation k and so on in the construction stage. To ensure that the structural alignment and cross section control stress of Lijiapu2# Bridge in the cantilever construction stage accord with the requirements of construction design documents, codes and standards. This paper mainly studies the following contents: 1) the monitoring and control of bridge construction is an important part of bridge construction technology. Based on the analysis, identification, adjustment and prediction of the error between the finite element calculation model and the measured data, the importance and necessity of bridge construction monitoring and control are explained. The method of construction control, the principle of construction monitoring and the technical flow of construction monitoring of multi-span prestressed concrete continuous rigid frame bridge are analyzed. This paper mainly analyzes the open-loop control method, closed-loop control method and adaptive monitoring method, and points out that the construction monitoring of PC continuous rigid frame bridge should be flexible and changeable combined with various analysis theories. Based on the theory of construction control, the design review and construction control calculation of Lijiapu2# Bridge are carried out. The control theory of vertical formwork elevation, influencing factors, calculating formula and setting curve of pre-arch degree are compared and analyzed respectively. (4) aiming at the special stage of cantilever construction of multi-span continuous PC rigid frame bridge with hanging basket, the maximum cantilever stage of the construction of T-frame structure is discussed. In the middle span closure stage, the whole bridge second stage pavement stage and the whole bridge 10 years operation stage, the corresponding bridge structure linear shape and the control section stress are compared and analyzed. It contributes a lot to the successful closure of the cantilever construction of Lijiapu2# Bridge and the control stress of the structure line and section to meet the requirements of the design documents and related codes.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.4

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