Muhammad Ameen Ali

Thankyou Sir for your suggestion i answers below your all points according to site condition. 1. partly cohesive soil. 2. At site Soil compaction possible. 3. water table depth about 500feet. 4.Yes 5. Already 30feet excavation was done long time ago, there is no secant piles for the retaintion of letarel soil pressure, if i go for piling . and at that 30feet bearing capacity is 0.75tsf. 7. Yes this building is supported by Raft footing, there is no other option. 8. how you can total load on column is 0.8tsf Sir i am searching for the solution that how to compact the soil to increase the bearing pressure upto atleast 1.5tsf and what is the methodology of compaction.

Piling is impossible due to site conditions.

Building two basement+Groumd+Four Floor How to improve bearing capacity of soil soil from 0.75tsf to 1.8 tsf?? and what technique or method should follow to improve the bearing capatcity for raft footing