Sri Lanka, Soil Improvement on Swamp Reclamation

[sykimm]

Hi,

I'm working in Soil Improvement Proposal in Sri Lanka.
The land was reclamated on 4m thick peat (N value about 3) and swamp, using beach sand 2m thick (N value about 7). Below peat stratum there exists 6 m thick silty clay (N value about 8 to 16). Weathered rock is 16m below ground level.

Is there any body to tell me about local practice and/or availability of equipement for soil improvement in Sri Lanka.

I'm now considering Paper Drain.

Any comments on Sri Lanka would be very much helpful to me.

 

[Hookem]

Consider piles to the load bearing rock. I once participated in the evaluation of various foundations for a small refinery in Sri Lanka. Good luck.

chesney@uei-houston.com

 

[HKBeaver]

Unless the proposed structure can take large settlements for over a long period (and I mean long) you should not consider vertical drains for the peat.

Piles may be a good solution but don't forget nsf. Also, removal and replacement will work for some structures, you might consider bog blasting.

Regards.

 

[ashjun]

Hi,
Just to add in; peats can NEVER EVER be stabilised/consolidated if thats what you are trying to do.
Please look up any ground imporvement text book on the subject
Regards

 

[dirtsqueezer]

I worked on a project very similiar to yours, though I'm not sure you'd have the same equipment, and there was no peat. It was a retail outlet with parking lot and gas station built on previously unused swamp-land. The soil profile was approximately 6' of compacted fill (above 90%) over 50' of very soft clay (liquid, at some depths). Stabilization consisted of reinforced augercast piles to competent soil and a structural foundation to accomodate pile locations. Again, we had virtually no peat, and still the parking lot was projected to settle on the order of feet in the first two years. Settling was to be compensated for by repeated overlays during the life of the building. A very nice structure as it turned out, though I can't say much about the asphalt...