Pile type comparisons
Pile type comparisons
(OP)
I am a new engineer trying to design a pile foundation system for a ped bridge. The soild is mainly silty sand with a water level roughly 10 feet below grade. The area is relatively high seismic zone and liquifaction is a possibility. I was hoping someone would be able to either tell me or guide me in choosing what type of pile, i.e. drilled, battered, cast in place, would be best for this type of site with regards to performance and cost. Thanks.





RE: Pile type comparisons
RE: Pile type comparisons
RE: Pile type comparisons
In addition to driven piling, an auger-cast pile system could also be considered. This uses a hollow stem auger that drills into the soil and injects grout through the tip of the auger as it is removed - thus the sandy soil doesn't present a problem with installation.
You might want to contact local foundation contractors to see what is the regional, common, types of foundations in the area of the project. This will allow locals to bid on it and help keep costs in line.
RE: Pile type comparisons
(as it is common in the area) but we simply feel it won't work due to the train. If you could provide some additional feedback about this, I would greatly appreciate it. thanks.
RE: Pile type comparisons
If it is directly adjacent to the rail, the only alternative would be to use a high-early strength grout in the piling - at least it would minimize the effect of any lateral movement or disturbance - but again, if the rail has been there a while, the vibration you are talking about is high frequency that doesn't carry a lot of energy and therefore would not "move" your pile or the earth around it - rather, simply vibrate through it.
RE: Pile type comparisons
RE: Pile type comparisons