湘潭三大桥主桥运营期调索施工控制技术研究

发布时间：2018-06-01 20:13

本文选题：斜拉桥 + 运营期　；参考：《湖南科技大学》2014年硕士论文

【摘要】：运营多年的斜拉桥，其斜拉索索力、塔梁线形及内力偏离成桥状态，可以通过调索改变其不利受力状态，同时实施调索施工控制确保调索效果与调索过程安全，，而国内外对于既有斜拉桥调索施工控制技术的研究案例较少，研究尚处于发展初期。本文以湘潭三大桥主桥调索工程为背景，对运营期斜拉桥调索施工控制技术展开研究，主要研究内容有：（1）介绍关于斜拉桥调索的国内外研究现状及经典的调索实例；分析运营期斜拉桥梁换索、调索的原因及调索的目的；阐述斜拉桥调索设计常规做法以及调索施工监控的必要性；说明调索施工控制的目的与任务。（2）建立调索施工控制理论及方法，主要包括调索施工控制理论、调索施工控制结构分析方法；阐述调索优化的影响矩阵法，提出调索优化目标以及调索顺序的确定方法。（3）结合湘潭三大桥调索实例，分析调索前主桥技术状态，建立与实际状况相接近的有限元分析模型，确定一个合理的调索目标状态，以影响矩阵理论为基础，求解索力调整量以及调索顺序。（4）建立湘潭三大桥调索施工监测体系，包括塔梁应力监测、斜拉索索力监测、主梁线形及塔偏位监测以及温度监测等。（5）分析湘潭三大桥主桥调索施工监控结果，并对调索施工监控方法进行总结与探讨。通过建立运营期斜拉桥调索施工控制理论及方法，建立湘潭三大桥调索施工监测体系，并应用于湘潭三大桥主桥运营期实际调索过程中，有效改善了湘潭三大桥的内力与线形，缓解了该桥不利受力状态，且调索过程安全，达到了调索预期效果，同时，本文所作研究为类似运营期斜拉桥调索施工控制提供了一个工程借鉴。
[Abstract]:For many years of operation of cable-stayed bridge, its cable-stayed cable force, tower beam line shape and internal force deviate from the bridge state, it can change its unfavorable stress state by adjusting cable, and at the same time, it can carry out the cable adjustment construction control to ensure the effect of cable adjustment and the safety of the process of cable adjustment. At home and abroad, there are few research cases on cable-adjusting construction control technology of existing cable-stayed bridges, and the research is still in the early stage of development. In this paper, based on the main bridge of Xiangtan third Bridge, the construction control technology of cable adjustment of cable-stayed bridge during operation period is studied. The main research contents are as follows: 1) introduce the domestic and international research status of cable adjustment of cable-stayed bridge and the classic example of cable adjustment, analyze the reasons of cable change, the reason and purpose of cable adjustment of cable-stayed bridge, expound the conventional method of cable adjustment design of cable-stayed bridge and the necessity of monitoring and control of cable adjustment construction. The purpose and task of cable-adjusting construction control are explained. 2) establishing the construction control theory and method of cable adjustment, mainly including the construction control theory of cable adjustment, the analysis method of construction control structure of cable adjustment, the influence matrix method of cable adjustment optimization, and the method of determining the optimization objective and the order of cable adjustment. Combined with the example of cable adjustment of Xiangtan third Bridge, the technical state of the main bridge before cable adjustment is analyzed, and the finite element analysis model is established, which is close to the actual situation, and a reasonable target state of cable adjustment is determined, which is based on the theory of influence matrix. The adjustment quantity of cable force and the order of cable adjustment are solved. The monitoring system for the construction of the third Xiangtan Bridge is established, including the stress monitoring of the tower beam, the cable force monitoring, the alignment and tower deflection monitoring of the main beam and the temperature monitoring, etc. This paper analyzes the monitoring results of the construction of the main bridge of Xiangtan third Bridge, and summarizes and discusses the monitoring methods of the construction of the cables. Based on the construction control theory and method of the cable-stayed bridge in operation period, the monitoring system of the cable-adjusted construction of the Xiangtan third Bridge is established, and it is applied to the actual cable-adjusting process of the main bridge of the Xiangtan third Bridge, which effectively improves the internal force and the alignment of the Xiangtan third Bridge. The unfavorable stress state of the bridge is alleviated, and the process of cable adjustment is safe, and the expected effect is achieved. At the same time, the research in this paper provides an engineering reference for the construction control of cable-stayed bridge in similar operation period.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4;U448.27

【参考文献】