Construction Technology of Steel Box Arch Bridge with Single Arch under Bearing Diagonal Span Space Cable Plane
The steel box arch bridge with single arch under bearing diagonal span space cable plane is beautiful in appearance and strong in span,but the special structure of the single arch rotating in the air makes the construction more difficult.According to Kelan River Bridge project,on the basis of the construction of conventional steel box arch bridge,temporary supporting structures such as inclined supports and columns are added to the steel pipe support system,which can improve the supporting effect and reduce the use of steel.In addition,in order to ensure the stability of the construction,the project also simulated the internal force analysis of the single arch through the finite element model software Midas/Civil,and set the wind cable at the position of the main beam 1/4 L and the main beam 3/4 L with the greatest deformation and displacement,to enhance the stability of the single arch.The results show that after the above construction,the construction period is completed 20 days ahead of schedule,and about 30 t of steel is saved.The steel box arch closing construction is smooth,the single arch line is in line with the design,and the project construction is stable,which effectively verifies the economic rationality of this construction technology and has significant application value.
NETL
NSTL
万方数据
