Construction mechanical characteristics and control technology of rhombic hanging baskets for continuous beam bridges in complex mountainous environments
WANG Leping
SUN Qianyi
YANG Zhiqiang
LI Wenjie
LIANG Bin
Abstract：To study the construction mechanical characteristics and control technology of rhombic hanging baskets during the cantilever pouring process of long-span prestressed concrete continuous beam bridges in complex mountainous environments,this paper takes the Huluba Special Bridge Project of the 9th bid section in the Kangyu section of the Xi'an-Chongqing High-Speed Railway as the engineering background.Midas-Civil is used to establish a finite element model of the rhombic hanging basket during the cantilever pouring construction stage.The stress distribution,deformation behavior,and overall anti-overturning stability of the key parts of the hanging basket are analyzed,and the corresponding hanging basket control technology is proposed and applied to the actual project.The results showed that:The maximum displacement of the main truss of the hanging basket structure is 16.646 mm,which appears at the front top of the main truss;the maximum combined stress of the main truss is 158.2 MPa,occurring in the middle of the front upper inclined member;the maximum combined stress and shear stress of the front upper crossbeam are 129.2 MPa and 62.9 MPa,respectively,both appearing at the junction of the front upper crossbeam with the main truss;the maximum deformation of the front upper crossbeam is 3.321 mm,located at both ends;the anti-overturning safety factor of the hanging basket is greater than 2,meeting the requirements of construction specifications;the hanging basket control technolog could achieve precise control of the bridge alignment in practical application.It can be concluded that the rhombic hanging basket structure is sound in design and fulfills all construction requirements;the proposed corresponding control technology is feasible,providing a valuable reference for similar engineering construction.
Keywords：high-speed railway long-span continuous beam bridgerhombic hanging basketcomplex mountainous environmentconstruction mechanical characteristicscontrol technology of hanging basket
Publication Date：2025-10-25
Online Publishing Date：2025-11-24(First online date of this platform, not the publication date of the document)
Pages：10( 70-79 )