Maowan Bridgein Zhongshan Jack-upabutment Replacement Technology Research

Bridge jack-up its essence is in full or basic without changing the original structure performance under the premise of using hydraulic sync jack-up principle component section or the whole top to control level.For bridge did not meet the requirements of navigable clearance,can through the whole synchronous jack-up improve navigation clearance,restore navigation ability;For bridge operation in good condition,can through the jack-up technique to let its linear high requirements,and to reinforce,to continue to be put into use,save cost;For basic deviation caused by natural disasters,the bridge pier subsidence,technology can make use of jack lifting shall be resumed.Based on the jack-up replacement MaoWan bridge engineering,zhongshan city,guangdong province,study on jack-up technique.First of all,for the entire construction process and the jack-up order the mechanical calculation and scheme comparison,determine the safety and reasonable jack-up scheme.Second,to ensure the smooth implementation of jack-up Maowan bridge engineering,study the feasibility of steel clamp under this kind of construction method,the structural design of steel hoop and is verified through experiments.In order to ensure the safety and economy in the process of jack-up,prevent the jack-up caused by jack synchronization error in the process of longitudinal beam stress is too large,and vertical and horizontal offset,in the process of starting process of bridge construction monitoring.According to the monitoring data to timely feedback of construction,to ensure the safe and orderly construction work.For subsequent jack-up construction to provide theoretical and practical guiding significance.