Construction control of a long-span single pylon cable-stayed bridge

ABSTRACT: Long-span single pylon steel-concrete hybrid cable-stayed bridges have wide range of application in the engineering field because of its own advantages. The line and internal force of hybrid cable-stayed bridge after completion are highly coupled with its construction method and installation procedure, thus the method of construction control being of vital importance. Determination of reasonable completion state of bridge and key technologies of the application of backward calculation method are described on the engineering background of Haihe bridge, so does the analysis of non-closure factors and adjustment of cable force. Measured results show that the stress, line and cable force of final state of hybrid cable-stayed bridge are controlled at standard range by adopting backward calculation method, as well as timely adjustment of cable force and line given non-closure factors.