Method for mounting ground anchor type suspension bridge prestressed concrete stiffening box girder
A technology for stiffening box girder and installation method, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of no installation method and no elaboration, etc.
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[0036] The installation sequence of the present invention has two kinds: start from the mid-span section and advance symmetrically toward the main towers on both sides, and advance from the section near the main tower to the mid-span and abutment. The steps are as follows:
[0037] 1. The concrete structure stiffened box girder adopts the segmented prefabricated erection method. The erection methods include the erection method of floating crane 2 as shown in Figure 1a and the erection method of cable crane 4 (hoist or continuous jack lifting) shown in Figure 1b. After the flat-bottomed barge 3 loaded with the girder section to be erected is towed by the tugboat to the bridge axis at the predetermined erection position, it is aligned with the lower lifting point blocks of the girder erection crane, and the floating barge is stabilized by the tug force and anchor pull of the tugboat. The connection between the lifting point and the lifting lug of the beam section is lifted after ...
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