薄壁式小石子混凝土T梁加固设计与施工技术研究

发布时间：2018-05-30 00:23

本文选题：薄壁式小石子混凝土 + T梁　；参考：《燕山大学》2015年硕士论文

【摘要】：伴随着我国社会经济的不断发展,交通量也日益增加,车型多样化,并向大型、重载方面发展,尤其是港口、矿山连接线以及运煤线路,重载交通已日益形成规模。由于车辆重载、超载的作用,使得多数道路、桥梁在早期即出现破坏,缩短了道路与桥梁的使用寿命。T型钢筋混凝土梁是桥梁结构中的一种常用的结构形式,所以,对于混凝土T型桥梁的加固设计与施工技术的研究具有显著的现实意义。本课题依托重载交通特征明显的京秦高速公路青龙连接线上的沙河特大桥实体工程,研究该类普通钢筋混凝土T型梁的加固修复问题与施工工艺。本文首先对沙河大桥的运营交通量及荷载情况进行了调查研究,分析了该桥服役期间实际运营荷载与设计荷载的差异,确定了运营荷载模型,分析了实际运营荷载对桥梁结构的影响。随后,对该桥运营过程中产生的裂缝、腐蚀等病害特征进行了检查分析,确定了该桥主要病害类型,分析各种病害产生的原因,在此基础上确定了该桥承载力缺失的内容。随后,基于加固方案的对比分析,结合该桥的实际工况。从施工、造价等多方面对加固方案进行比较、论证各种加固方案的可行性。考虑到施工工艺与经济问题,确定了该桥的加固方案。设计和选用了一系列施工工艺,保证新旧结构的共同工作。并基于动静载试验测试,评估了该桥的加固效果。
[Abstract]:With the development of our country's social economy, the traffic volume is increasing day by day, the vehicle type is diversified, and develops to the large-scale, the heavy load aspect, especially the port, the mine connection line and the coal transportation line, the heavy haul transportation has formed the scale day by day. Because of the effect of overloading and overloading, most roads and bridges are destroyed in the early stage, which shortens the service life of roads and bridges. T-type reinforced concrete beams are one of the common structural forms in bridge structures. It is of great practical significance to study the reinforcement design and construction technology of T-type concrete bridge. Based on the solid project of Shahe super bridge on the Azure Dragon connecting line of Jingqin Expressway, the problem of reinforcement and repair of this kind of ordinary reinforced concrete T-shaped beam and its construction technology are studied in this paper. In this paper, the traffic volume and load of Shahe Bridge are investigated, the difference between actual operating load and design load is analyzed, and the operating load model is determined. The influence of actual operation load on bridge structure is analyzed. Then, the characteristics of cracks, corrosion and other diseases produced during the operation of the bridge are checked and analyzed, and the main disease types of the bridge are determined, and the causes of the various diseases are analyzed. On this basis, the contents of the lack of bearing capacity of the bridge are determined. Then, based on the comparative analysis of the reinforcement scheme, combined with the actual conditions of the bridge. The feasibility of various reinforcement schemes is demonstrated by comparison of construction cost and other aspects. Considering the construction technology and economic problems, the reinforcement scheme of the bridge is determined. A series of construction techniques are designed and selected to ensure the joint work of new and old structures. The reinforcement effect of the bridge is evaluated on the basis of static and dynamic load test.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.72

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