| Summary: | 碩士 === 明新科技大學 === 土木工程與環境資源管理系碩士在職專班 === 107 === The Zhongzheng Bridge was built in A.D. 1982 in July. It is the main road connecting the Zhudong Town of Xinzhu County and the main forest of the Yulin Country. It is also an important road to and from the Science Park and the Industrial Research Institute. The whole bridge has a total of 17 spans with a span of 40m and a total length of 680m. The two-way two-lane mining line is separated by a total width of 10.1m. The upper part of the bridge is a simple prestressed concrete I-beam bridge structure, and the lower part is an RC cylindrical pier. And the foundation of the sinking box, which was originally the old dangerous bridge of the tube. Since the bridge site is in the scouring section, solid bed workers were built in the early stage to prevent the pier from scouring. However, after several floods, the solid bed workers were destroyed and the source erosion occurred, which endangered the safety of the pier. Therefore, on August 2, 2012, during the typhoon Sula, the flood destroyed the right-hand solid bed worker and brushed the deep riverbed for about 12m, causing the foundation of the caisson of the P8 and P9 piers to be severely exposed and inclined, and there was a dumping at any time. At that time, the government closed the bridge for more than six months. As the current Zhulin Bridge is undergoing construction and reconstruction, it has caused two bridges to cross the head and the front of the river and the two bridges are unable to perform normal traffic functions, thus affecting the traffic.
The content of this research project is based on the analysis of the reconstruction of Zhongzheng Bridge and the comparison of the advantages and disadvantages of related engineering construction, and then proposes the best proposal. The research is expected to achieve the following objectives: 1. Improve the old dangerous bridge: The large span spans the deep trough of the river to solve the problem of bridge pier scouring, reduce long-term maintenance funds and natural disasters, resulting in bridge damage and loss of life and property, increase vehicle safety, and reduce the non-quantitative benefits of passers-by. 2. Meet the design specifications and regulatory requirements: Reconstruction of old bridges to meet the latest requirements for bridge seismic design and river regulations, improve the seismic and flood resistance of bridges, and effectively reduce disasters. 3. Cooperate with local historical and human characteristics: Choosing a bridge type that suits the local landscape and combines usability and aesthetics will make the bridge a prominent landmark to promote local tourism and economic development. 4. Cooperate with the waterfront space plan: The indirect benefits are to match the waterfront space plan in the future, to preserve the ecological wetland as a buffer zone, and to provide the local residents and tourists with a hydrophilic and rest space.
The conclusions of this study can be used for reference and design of subsequent related bridge reconstruction planning and design.
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