Installation of telescopic device
Anchor width of the expansion device.
Need to sew steel reinforcement embedded in the beam (plate) specification expansion anchor width end and the abutment. Considering the coordination of the construction technology of anchor width expansion device according to the 50cm settings as appropriate, should adopt the abutment back wall width is set, it is convenient for the bridge panel, cast-in-place concrete pavement concrete construction the stability of the telescopic device also has been protected.
Anchorage reinforcement of the expansion device.
In the precast beam (plate) and the end of the back wall embedded within the expansion device of anchor bars is carried out in two different conditions. The general design is given to the width of the bridge in the center of symmetry, beam (plate) is arranged on the end of the pre buried steel, reinforced in each beam (plate) in the the embedded position is not the same, to increase the difficulty of construction, so the anchor bars should be symmetrical to each piece of beam (plate) of the center set, this should be considered in the design.
In order to ensure the construction of anchor bars. Only setting is not desirable in the pouring of concrete bridge deck 8 - 10cm thick, this fact does not allow positioning telescopic device firmly angle and beam (plate) and the back wall concrete connection into a whole, the formation of unstable risks, need construction seriously.