Deep foundation Recomendation

[deemtocomply]

I'm currently designing foundations for a three-storey apartment building located near the coast. The geotechnical report indicates sandy soil conditions with a high water table (approximately 1.5 meters below ground level). I'm considering the use of concrete piles, but I’m unsure whether this is still a suitable option under these conditions.


If concrete piles are viable, what additional factors should I take into account? One concern is the potential for reinforcement corrosion due to the aggressive environment. To mitigate this, I'm planning to increase the concrete cover and possibly control the crack widths in the piles. Would these measures be sufficient, or should I consider an alternative foundation system?

 

[HTURKAK]

I'm considering the use of concrete piles, but I’m unsure whether this is still a suitable option under these conditions.

IMO, suitable but if precast driven pile since the compactness and quality control better than bored piles.
You may consider steel driven piles with choosing thickness with suitable corrosion allowance together with corrosion coating and CP .

 

[jhnblgr]

What does the geotechnical report say and what were the characteristics and depth of the borings?

Did you get any at grade bearing capacity?

Research galvanized or epoxy coatings, also maybe call up a supplier to see what they typically run into.

 

[phamENG]

Lean on the geotech for pile recommendations. They'll know if you need them for bearing/settlement considerations, and they should know if you need them for scour if you're that close to the coast - but you may need to nudge them in that direction if there's a regulatory reason that goes beyond site specific engineering.