boulders backfill with concrete binder for overcut foundation?
boulders backfill with concrete binder for overcut foundation?
(OP)
Our hospital project has deep foundation.Overcut of more less 1.8 m below pile cap was made due to space problem. Depth of water is about 80 cm. I want to backfill first with boulders mixed with concrete binder up to the water level. But I doubt the stability of subgrade foundation of the pile cap. Please any expert can give me opinion on this, highly appreciated.





RE: boulders backfill with concrete binder for overcut foundation?
Stability of the material directly under the pile cap should not matter, as the vertical load is supported by the piles and the lateral load is braced by the slab. However, I don't understand why the undercut was made. What does a space problem have to do with it? I trust this was for one column only.
RE: boulders backfill with concrete binder for overcut foundation?
tnx to your reply, greatly appreciated.Our foundation is clustered piles in different pile caps, it is located the edge of building with adjacent existing structure,on one side and a deeper pile cap on the other so overcut was made. In this case, I want to place boulders first with concrete binder up to the level of water, then backfil with selected fill materials. However, because of deep overcut, I doubt if stability of subgrade level below the cap might be affected. Hope you can explain further.tnx a lot.
RE: boulders backfill with concrete binder for overcut foundation?
RE: boulders backfill with concrete binder for overcut foundation?
RE: boulders backfill with concrete binder for overcut foundation?