Preloading Construction Technology of Reaction Frame of 0#～1# Block Bracket of High Pier Continuous Rigid Frame Bridge
In order to solve the problems of unsafe,difficult to implement and complex high-altitude operation in the traditional mate-rial preloading method to pressurize the 0#～1#blocks of high-pier and long-span continuous rigid frame,taking the 0#～1#blocks of high-pier continuous rigid frame of Youlian Honghe Bridge in the new project of Yinkun Expressway as an example,the character-istics,difficulties and improvement measures of preloading construction are analyzed,and a kind of preloading construction technology suitable for the 0#～1#blocks of high-pier and long-span continuous rigid frame is put forward,that is,the load-bearing brackets are buried on the top and side of the bridge pier,and the observation points and reaction frames are set up to carry out reverse load pre-loading on the brackets.In addition,it is necessary to arrange the distribution beam to achieve the balanced distribution of load.
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