Key Technique Of Qingshui River Self–Anchored Suspension Bridge Continuous Box Girder Jacking-up

With the development of our country's society and economy,engineering technology has also been developed.The level of our country's bridge construction has been greatly improved both in theory and in technology.China's transportation industry has also entered an unprecedented period of rapid development.In this context,the new technical standards have higher requirements for new traffic construction both in design and construction.With the development of vehicles and ships,there is a higher demand for line indexes,load levels and clearance limits.Therefore,some existing bridges built according to the old technical standards can no longer meet the needs of the new technical standards.For those unsatisfactory bridges,this part of the bridge is often demolished and then rebuilt.Due to the generally long construction period of the bridge,the newly constructed bridge will greatly affect the operation of the existing railway line.On the other hand,Due to the huge investment in construction,it will cause great waste.Most of the bridges in this part of the bridge are not completed for a long time and their carrying capacity can fully meet the requirements of current technical specifications.Therefore,in order to achieve smooth connection with new lines or increase the height of underpasses and other requirements,can take the upgrade program.On the one hand,the scheme can make maximum use of the existing bridge structure.On the other hand,the scheme can minimize the impact on the existing traffic during the construction.Therefore,using the jacking method to meet the technical requirements of the existing capacity The transformation of the bridge has a very important meaning.In this context,during the transformation of Chengdu Second Ring Expressway,in response to the requirements of energy conservation and emission reduction,six existing flyovers of the Second Ring Road were upgraded and treated.Among them,the Qingshui River Self-anchored Suspension Bridge is in the form of a structure The most special one.Qingshui River Self-anchored Suspension Bridge is a rare special bridge in Chengdu.The upgrade brought new ideas into the utilization of existing bridges in urban construction and played a role in building a resource-saving and environment-friendly society effect.During the construction of Chengdu Second Ring Expressway,the company participated in the jacking construction of the approach bridge of Qingshuihe Self-anchored Suspension Bridge,conducted research on the key construction technologies in the construction process,and participated in the structural inspection of subsequent completion and acceptance and operation phases.The operating status of a detailed assessment.In this thesis,the Qingshuihe self-anchored suspension bridge approach construction of jacking for a detailed discussion and research,and after the transformation through the bridge detection carried out a detailed assessment of its operation on the same type of bridge construction has a strong reference and reference value.