Pipe pile to plate connection on bridge cap beam
Pipe pile to plate connection on bridge cap beam
(OP)
When connecting a pipe pile to an embedded plate on a cap beam of a bridge pier, which type of weld works best? fillet or a groove weld with a steel backing ring?
I was told it is difficult to get a proper weld because of the difficulty in getting all the pile tops level enough to get each plate flush with the pile. Any thoughts?
I was told it is difficult to get a proper weld because of the difficulty in getting all the pile tops level enough to get each plate flush with the pile. Any thoughts?





RE: Pipe pile to plate connection on bridge cap beam
Respect buildability, certainly a field situation won't help to get perfect levels even with sawing someway upon a works' slab on the ground.
Respect behaviour, a complete penetration weld properly mechanized is likely to behave better in any instance movement and fatigue (even if short term cycle) may be of interest. Remember how we break wires in just a dozen of large plastic deformation cycles. Full penetration welds lack the prebuilt extant fisure angle welds leave in the unfused thickness, and so are better at fatigue.
RE: Pipe pile to plate connection on bridge cap beam
RE: Pipe pile to plate connection on bridge cap beam
The first sketch requires the workers to cut each of the pilings to the exact length and perfectly square to obtain the proper fit for welding. Remember, if the root opening is more than 1.6 mm, the fillet weld size has to be increased. The increased fillet size increases the volume of weld metal required and the time it takes to weld by the square of the weld leg. In other words, the volume of weld in a 13 mm is four times that required to deposit a 6.4 mm weld. If the root opening exceeds 5 mm, the base metal has to be repaired by depositing weld on the edge to close the root opening. Costly process that takes time to complete.
The groove weld, with backing is probably the best way to proceed. However, the groove shown appears to be a square groove, very difficult in the best of circumstances. A bevel groove with a 45 degree bevel would be easier to weld.
Best regards - Al
RE: Pipe pile to plate connection on bridge cap beam
Very helpful
RE: Pipe pile to plate connection on bridge cap beam