| The increasing level of national urban development quickly soared, many urban roads and traffic arteries gradually can not meet the transport needs of the city. Which increase the height of existing bridges to increase clearance under the bridge reconstruction project in the area has become a major focus. But the design and construction of bridge jacking project mainly depends on the experience, the lack of systematic, scientific theory, a lot of issues to be studied.The project monitoring and analysis provide guarantee construction safety aspects of decision-making basis for the construction of great significance, but also as a new engineering design theory and construction technology means. With the continuous development of monitoring technology, engineering monitoring and analysis of construction play an increasingly large role.In this paper, Xianyue Road and success Avenue Interchange Improvement Project to enhance the background to monitor and study the whole process of lifting stress and displacement analysis. The bridge lifting larger space, the maximum lifting height of 3.122 m, and a rotary lifting, jacking after the end of the longitudinal bridge from-4.53% to 2.74% transfer in the process of lifting the entire bridge force the situation has changed. Because the proportion of three-span synchronous lifting, each pier below needs a lot of jacks, each jack while the proportion of lifting, and jack lifting of different sections of different heights, the same cross-section jack may also appear around the track. The monitor is lifting the whole process real-time monitoring, analysis using ANSYS finite element software calculations may be a variety of the most unfavorable force conditions, as well as bridge the stress variation in power lifting process and make comparison with the measured data to achieve security, stability, controlled lifting goals. |
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