bridges - trestle
bridges - trestle
(OP)
I would like to know what maximum deflection of steel trestle with concrete pile cap supporting concrete bridge.What kind of bearings do you have to use (neoprene, roller...)?
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RE: bridges - trestle
RE: bridges - trestle
The deflection tolerable or otherwise I would believe to be governed by the foundation capacity and as such I can't really give you an answer. But if you're driving the pile our battered members of the trestle to bedrock then I would like to believe that the deflection is negligible. Low Profile bearings are used mainly today although if this is for a railroad I hesitate to say neoprene unless it has a pretty high durometer.
If this is for a highway or road then the bent is just called a "pile bent" or "pile cap bent" and 60 or 70 durometer neoprene pads are typically used. Again, the deflection is likely to be based on the soil-pile interaction and would need to be evaluated by COM-624 or equal. But if driven to refusal - nothing need to be evaluated.