Effects of Injection Grouting (Below Slab) on Soil Subgrade Modulus
Effects of Injection Grouting (Below Slab) on Soil Subgrade Modulus
(OP)
I have looked into repair methodologies for filling voids below an industrial slab on grade for the purpose of providing continuous support under the slab. Injection grouting is one possibility that is being considered. My question is, does the grout (cementitious) provide an increase in the subgrade modulus (k-value of the soil)? Or, does the grout just help provide a more uniform surface to evenly distribute the load onto the subgrade? If it does provide an increase, is there a way to quantify the increase to the k-value in order to calculate load carrying capacity of the slab after the repair is completed? Any thoughts, or recommended references would be much appreciated!
Thanks!
Thanks!





RE: Effects of Injection Grouting (Below Slab) on Soil Subgrade Modulus
RE: Effects of Injection Grouting (Below Slab) on Soil Subgrade Modulus
RE: Effects of Injection Grouting (Below Slab) on Soil Subgrade Modulus
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Effects of Injection Grouting (Below Slab) on Soil Subgrade Modulus
f-d
¡papá gordo ain’t no madre flaca!
RE: Effects of Injection Grouting (Below Slab) on Soil Subgrade Modulus
RE: Effects of Injection Grouting (Below Slab) on Soil Subgrade Modulus
1. In areas where your grouting compacts but does not infuse the existing soil, you will get a change in the modulus as the modulus is somewhat dependent on density (though its effect can be relatively small)
2. You will have voids filled directly under the slab with all grout material which has a much higher modulus than the surrounding soil (a hard spot)
3. You will have soil that is infused with cementitious material that will have a modulus somewhere between the grout modulus and the original soil modulus
4. You will have soil that gets no treatment at all, thus no change in its modulus.
These conditions will serve to create an irregular bearing condition. This will induce differing subgrade restaint and thus more random cracking, and if the slab is heavily loaded, will respond differently to the loading based on the variable hard and soft spots.
RE: Effects of Injection Grouting (Below Slab) on Soil Subgrade Modulus
Intrusion Prepakt /marineconcrete.com