Ground Improvement (rigid inclusions)
Ground Improvement (rigid inclusions)
(OP)
I'm looking for standards and good references to use for analysing rigid inclusions (e.g. CMC's, stone columns, piles, etc) to reduce consolidation settlements in soft clay after placement of fill + other surcharge loads. More specifically, I'm interested in calculating the average modulus between soil and structure (another method rather than obtaining a weighted average?) and designing the bridging platform at the top of these rigid inclusions.





RE: Ground Improvement (rigid inclusions)
http://www.presses-des-ponts.fr/notre-librairie/32...
It is the result of a national research project in France called ASIRI.
RE: Ground Improvement (rigid inclusions)
RE: Ground Improvement (rigid inclusions)
http://www.geotechtools.org/
This website has very good info for all kind of soil improvement techniques.
The FHWA manuals also have information about different type of soil improvements.
RE: Ground Improvement (rigid inclusions)
RE: Ground Improvement (rigid inclusions)
Grout strength can vary from 1,000psi to 4,0000psi.
Will there be a load transfer platform above the top of the inclusions?
For comparing stiffness, keep in mind that short term stiffness ratio will be different than long term stiffness ratio. Over time, the Rigid Inclusion will attract more load.
Will the rigid inclusion be reinforced with steel rebar? If not, you will have a very stiff axial element with little or no flexural stiffness, which will limit the applicability for any installation with lateral loads or lateral strain.
RE: Ground Improvement (rigid inclusions)
RE: Ground Improvement (rigid inclusions)
RE: Ground Improvement (rigid inclusions)
If the depth of treatment is greater than 15m or load greater than 5 tons/m2 go for rigid inclusions.
If the cohesion is lower than 15 KPa use precast rigit inclusion, stone columns or cast in place concrete inclusions won't make it (impossible to compact the stone due to lack of lateral resistance from soil and the weight of fresh concrete will be too much for the surrounding ground and caus large concrete overbreak leading to question inclusion integrity).