新旧空心板桥纵向连接处理方案研究
发布时间：2018-08-22 17:06
【摘要】：随着广州市公路交通事业的迅猛发展，公路交通量不断增加，很多桥梁交通量已远远超过了设计通行能力。由于历史和资金的原因，市内大部分20世纪后期修建的桥梁仍在营运使用，但其桥面宽度已无法满足现代交通的通行要求，成为制约公路运输事业发展的瓶颈。尤其对于广州周边郊区，这种情况更为显著。对这些旧桥如要全部推倒重建，则既不科学，更不现实。对于那些健康情况良好，远没有达到使用寿命的旧桥，采用拓宽改建的办法，提高其通行能力，实则为较好办法。 旧桥拓宽可以利用旧桥单侧或双侧建新桥的办法，这种方法具有工期短，节省费用，并且不会中断交通的特点。当前，由于旧桥拓宽改建的过程中常存在原始资料和图纸不全的客观原因，旧桥拓宽改建设计的制约因素和技术风险远比设计新桥要大得多。加强对旧桥拓宽改建的新材料、新方法、新技术的研究，总结区内旧桥拓宽改建的各种经验，如能为今后旧桥拓宽改建提供一些借鉴，则达到了本论文的研究目的。 该论文主要结合位于广州南沙区省道S111线一涌中桥、二涌中桥两座桥拓宽改建的实例，重点对新旧桥梁桥面纵向连接的处理方法和相关新材料进行研究。通过研究，解决如下问题：1）通过实测一座8米跨径的新旧空心板桥纵向连接处的跨中挠度差，进行桥面铺装层抗弯、抗剪分析与计算，确定桥面连续铺装方案，，经过实施4年后的观察，效果良好；2）提出同类桥型桥面连续铺装的处理方法；3）提出新旧桥纵向、横向连接处1m范围采用高强韧性混凝土连续铺装，其余采用普通混凝土铺装的新型混凝土材料的处理方法；4）提出高强韧性混凝土：水性环氧树脂或丁苯橡胶增强钢纤维混凝土、高强灌注混凝土等新材料特性。
[Abstract]:With the rapid development of highway traffic in Guangzhou, the traffic volume of highway is increasing, and the traffic volume of many bridges has far exceeded the capacity of design. Because of the history and capital, most of the bridges built in the late 20th century in the city are still in operation, but the width of the bridge deck can no longer meet the requirements of modern traffic, which has become the bottleneck restricting the development of highway transportation. Especially for the suburbs around Guangzhou, this situation is more significant. It is neither scientific nor realistic to demolish and rebuild all these old bridges. For those old bridges which are in good health and far from reaching their service life, it is a better way to use the method of widening and rebuilding to improve their capacity. The method of building new bridge on one or both sides of old bridge can be used in widening old bridge. This method has the characteristics of short time limit, saving cost and not interrupting traffic. At present, due to the objective reasons of incomplete original data and drawings in the process of widening and rebuilding old bridges, the restrictive factors and technical risks of widening and rebuilding old bridges are far greater than that of designing new bridges. Strengthening the research on new materials, new methods and new technologies of widening and rebuilding old bridges, summarizing various experiences of widening and rebuilding old bridges in the area, if it can provide some reference for widening and rebuilding of old bridges in the future, then the purpose of this paper is achieved. This paper mainly combines with the examples of widening and rebuilding of the first surge bridge and the second Chung middle bridge along the S111 line of the provincial road in Nansha District of Guangzhou. The emphasis is on the treatment method and the related new materials of the longitudinal connection of the bridge deck between the new and the old bridges. Through the research, the following problem is solved: (1) by measuring the deflection difference in the longitudinal joint of a new and old hollow slab bridge with 8 meters span, the bending resistance, shear resistance analysis and calculation of the deck pavement layer are carried out, and the continuous paving scheme of the bridge deck is determined. After 4 years' observation, the effect is good (2) the treatment method of continuous pavement of similar bridge deck is put forward. (3) the longitudinal and horizontal connection of new and old bridges is proposed, and the continuous paving of high strength and ductile concrete is adopted in the area of 1 m in transverse connection. In addition, the treatment method of new concrete materials with ordinary concrete pavement is presented. The new properties of high strength and toughness concrete, such as waterborne epoxy resin or styrene-butadiene rubber reinforced steel fiber reinforced concrete, high strength cast-in-place concrete and so on, are put forward.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.7
本文编号：2197764
[Abstract]:With the rapid development of highway traffic in Guangzhou, the traffic volume of highway is increasing, and the traffic volume of many bridges has far exceeded the capacity of design. Because of the history and capital, most of the bridges built in the late 20th century in the city are still in operation, but the width of the bridge deck can no longer meet the requirements of modern traffic, which has become the bottleneck restricting the development of highway transportation. Especially for the suburbs around Guangzhou, this situation is more significant. It is neither scientific nor realistic to demolish and rebuild all these old bridges. For those old bridges which are in good health and far from reaching their service life, it is a better way to use the method of widening and rebuilding to improve their capacity. The method of building new bridge on one or both sides of old bridge can be used in widening old bridge. This method has the characteristics of short time limit, saving cost and not interrupting traffic. At present, due to the objective reasons of incomplete original data and drawings in the process of widening and rebuilding old bridges, the restrictive factors and technical risks of widening and rebuilding old bridges are far greater than that of designing new bridges. Strengthening the research on new materials, new methods and new technologies of widening and rebuilding old bridges, summarizing various experiences of widening and rebuilding old bridges in the area, if it can provide some reference for widening and rebuilding of old bridges in the future, then the purpose of this paper is achieved. This paper mainly combines with the examples of widening and rebuilding of the first surge bridge and the second Chung middle bridge along the S111 line of the provincial road in Nansha District of Guangzhou. The emphasis is on the treatment method and the related new materials of the longitudinal connection of the bridge deck between the new and the old bridges. Through the research, the following problem is solved: (1) by measuring the deflection difference in the longitudinal joint of a new and old hollow slab bridge with 8 meters span, the bending resistance, shear resistance analysis and calculation of the deck pavement layer are carried out, and the continuous paving scheme of the bridge deck is determined. After 4 years' observation, the effect is good (2) the treatment method of continuous pavement of similar bridge deck is put forward. (3) the longitudinal and horizontal connection of new and old bridges is proposed, and the continuous paving of high strength and ductile concrete is adopted in the area of 1 m in transverse connection. In addition, the treatment method of new concrete materials with ordinary concrete pavement is presented. The new properties of high strength and toughness concrete, such as waterborne epoxy resin or styrene-butadiene rubber reinforced steel fiber reinforced concrete, high strength cast-in-place concrete and so on, are put forward.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.7
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