| Hong Kong-Zhuhai-Macao Bridge sea-river-through ship channel bridge tower is 110 meters high and 2650 tons weight whole steel structure, whose modular lifting construction is a large project, sea hoisting environment is more complex, the construction of the tower construction risk factor is higher, lifting more difficult, and its construction is one of the largest construction projects among the bridge construction. Because tower preset lifting point can not meet the security needs for lifting, in view of tower’s interior, exterior structural characteristics and specific construction conditions, the use of composite truss and special combination spreader for tower hoisting,at the same time in order to convenient install spreader and high altitude demolition operations, spreader and tower use equal-intensity rod and high-strength bolts group fastening to connect, the composite truss and special combination of high-strength bolts group spreader stress analysis become a key for tower’s safe lifting.To ensure that the composite truss and special combination spreader of the components are reasonable structure and tower hoisting connectivity solutions meets the requirements for modular hoisting, this article based on finite element analysis software to build the tower structure construction parameters, conducts the strength and stiffness of overall structural components analysis, stability analysis and contact the lifting process analysis. After repeated simulation spreader structure strengthening and connectivity solutions lifting to optimize, the results show that the composite truss overall tower construction of modular construction and special combination spreader structural model and its parameter settings are reasonably practicable, conducting spreader numerical simulation analysis is necessary to lay a solid foundation for the modular construction of the tower lifting. |
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