On the San Antonio "Y" bridges the surface drainage from the top of the bridge was carried in ducts cast into the cantilever wings of the
box girder, to the interior of the box and finally discharged through the piers into a storm drainage system.
In order to determine the reliability of reinforced concrete
box girder bridges, three viaducts were chosen in which the flow of moving heavy transport varied from 285 to 332 vpd (Fig.
The normal stress, shear stress and principle tensile stress in the
box girder cross-section of Xintan Bridge is calculated and analyzed by the space frame lattice model.
Selected Bridge Description: A cast*in*place three span continuous
box girder bridge was selected having a total length of 150 m.
the bridge girder span length ranges from 20 to 60 m for both I and
box girder.
The high torsional strength of
box girder makes it particularly suitable for sharp curve alignment so as to accommodate to topography along traffic lines, skewed piers and abutment, superelevation, and transitions such as interchange ramp structures.
Box girder cranes have a light weight-to-span length ratio, engineers note.
Segmental construction techniques will be required to support the designs created for the bridge, and sources suggest a 1,400m segmental twin
box girder bridge will be installed on the Deira side of the project.
Designs for the bridge mean that a segmental construction technique will be necessary, with a 1,400m segmental twin
box girder bridge on the Deira side of the project.
For the suspended portions, the deck superstructure is a
box girder of a triple-cell steel box; prestressed twin-cell boxes are used for the sections over the piers.
The
box girder with a closed cross-section, which has better global behaviour, larger torsion stiffness and an effective top and bottom concrete flange in compression, is widely used in large bridge structures.
It is a pre-stressed post-tensioned balanced cantilever
box girder bridge with a total length of 1116 feet.
