RESEARCH ON INTEGRAL LIFTING SPLIT CONSTRUCTION TECHNOLOGY OF DOUBLE-LAYER STEEL CONTINUOUS BRIDGE WITH SUPER HIGH-RISE LONG-SPAN CANTILEVERED STRUCTURE
The long-span cantilevered double-deck steel bridge of Hengqin railway construction plaza project is set at an altitude of nearly 100 meters,there are many special-shaped members,and it also has the characteristics of large weight of single member and high welding quality requirements.Considering the factors of tight construc-tion period,difficult construction and high precision control of the steel structure project,the conventional hoisting method is difficult to meet the actual demand.In order to solve the above problems,a kind of multi-turnover mov-able steel structure assembly tire frame is developed in this project.I-steel is used as temporary connecting fixed member to assemble the truss of two-story steel bridge on the tire frame as a whole.The hydraulic integral lifting method is used to synchronously lift the integral truss.After the lower steel bridge truss is in place,it is fixed and the temporary connecting member is removed,and the upper steel bridge truss continues to be lifted.The integral lift-ing split construction and synchronous lifting asynchronous unloading of double-layer steel bridge are realized.It is proved by engineering practice that the construction technology ensures the construction quality,improves the con-struction safety and saves the construction period,and can provide a reference basis for the construction of similar projects.
super high-rise buildinglong spancantilevered structureoverall promotionasynchronous un-loading
NETL
NSTL
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