| In the process of arch bridge’s development, due to the structual capacity, the Concrete-Filled Steel Tube(CFST) tied arch bridge provides practical solutions to problems such as light weight, contradiciton between construction and span, thus it is developing rapidly in recent years. Tied arch bridge is externally statically determinated and internally higher order statically indeterminated. In the process of construction, some key issues, such as collar beam and arch rib line, tie bar and derrick tensile force, structual internal force, can be solved by using construction control. Taking Pangcunxi concrete-filled steel tubes tied arch bridge as an example, based on the theory and method of the CFST tied arch bridge, the thesis combined the site construction conditions and built an effective construction control system. The article also colleted the data to ensure that everything is in line with the requirements, which will provide some references to bulid a perfect construction monitor system of the CFST tied arch bridge.In this thesis, the main contents are as follows:1. The article first elaborates the development situation and development trends and then it investigates the purpose, contents, methods of the CFST tied arch bridge construction monitor. According to the construction scheme of this project, it introduces the implementation of the construction monitor.2. A bridge model is built by using MIDAS/Civil software. The whole process of the construction is analyzed and the results of each construction stage is given, which ensures the structural safety of each stage.3. Contrasting the theoretical value with the data gathered in the actual construction field, the article analyzes the construction monitor. The results show that the stress state of collar beam and arch rib is in a good condition, the linetype is in line with the design requirements and the measured value of derrick axial force is close to the theoretical value, the error is within5%. |
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