CONSTRUCTION METHOD FOR A SEMI-INTEGRAL ABUTMENT BRIDGE USING A STEEL BOX GIRDER

摘要

The present invention relates to a construction method for a semi-integral abutment bridge which constitutes a form of bridge embodying a new concept developed in order to bring out as much as possible the advantages of integral abutment bridges in which the abutments and superstructure are integrated and at the same time to compensate for restrictive conditions in use; and in particular it relates to a construction method for a semi-integral abutment bridge using a steel box girder. The present invention provides a construction method for a semi-integral abutment bridge using a steel box girder, characterised in that it comprises: a first stage in which abutment-section banking work is carried out and piles are constructed and then lean concrete for the abutment foundations is cast and pile-head reinforcement is effected; a second stage in which a spread foundation is constructed and the construction of the abutment stem walls and wing walls is completed and then bridge bearings are installed; a third stage in which a steel box girder, which has been manufactured in a factory and transported to the site, is put in place and joining of the steel box girder and crossbeams is carried out on site and then connecting reinforcing bars are put in place for connecting the steel box girder and end partition walls; a fourth stage in which an expansion joint filler is provided on the joining surfaces of the end partition walls and the wing walls in order to separate them; a fifth stage in which the reinforcing bars of the end partition walls are put in place at the same time as the reinforcing bars of the bridge deck panel, and the bridge deck panel and the end partition walls are integrally cast; a sixth stage in which back filling is carried out on the back surfaces of the abutments; a seventh stage in which, after the back filling has been completed, a first and a second support slab are constructed and then the first support slab has constructed on the upper surface thereof a connecting slab which is coupled with the bridge deck panel and a shock-absorbing slab which connects with a main-lane paving section, and the second support slab has constructed on the upper surface thereof a shock-absorbing slab and a main-lane surfacing section; and an eighth stage in which an expansion-regulating device is installed between the connecting slab and the shock-absorbing slab.