Requirements for bridge deck on steep slope
Requirements for bridge deck on steep slope
(OP)
I'm currently looking at a highway bridge with a longitudinal slope of as much as 14%, which is more than I--or anyone else in my office--can ever recall seeing. I think I generally have my head wrapped around it with the exception of the deck. I'm concerned that it could be difficult to construct. I'm sure that a method to pull the paving machine up the bridge can be devised. However, I'm wondering if we're going to end up with bad results because of the plastic concrete heaving slightly behind the machine when the concrete is vibrated in front of the machine, or perhaps something else I'm not thinking of.
I'm also wondering if some special finish is going to be needed to provide some extra skid resistance.
Anyone ever do a bridge this steep?
I'm also wondering if some special finish is going to be needed to provide some extra skid resistance.
Anyone ever do a bridge this steep?






RE: Requirements for bridge deck on steep slope
As for skid resistance, I believe that grooved finish would help. Wet weather and winter conditions could be a very big problem, however.
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RE: Requirements for bridge deck on steep slope
Anyway you do need to be careful to instruct the sequence of pours to be from the low to high end.
As for bearings, you may want to bolt some angles on the downhill side of the bearings as a stop. This will depend on what type of bearing your using of course.
Regards,
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Qshake
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RE: Requirements for bridge deck on steep slope
Qshake: we have laminated bearing pads, and they're detailed so that they can't "walk off".
RE: Requirements for bridge deck on steep slope
A solution to this may bevelled plate of some sort during casting, external to the flange.
HTH