Method for increasing the bearing capacity of foundation soils for built structures

  • US 6,634,831 B2
  • Filed: 09/02/1999
  • Issued: 10/21/2003
  • Est. Priority Date: 12/02/1996
  • Status: Expired due to Term
First Claim
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1. A method for increasing the bearing capacity of foundation soils for built a structures comprising:

  • providing a plurality of holes spaced from each other, under the foundation of a built structure, deep in the foundation soil;

    injecting into the foundation soil, through said holes, a substance which expands as a consequence of a chemical reaction;

    producing compaction of the foundation soil contiguous to the injection one due to the expansion of said substance injected into the soil;

    constantly monitoring level variations of the soil and/or built structures overlying the injection zone to detect the moment when the built structures and/or the soil surface, overlying injection zone, begins to raise which is the moment in which the compaction of the foundation soil has reached levels generally higher than a required minimum value at which the soil lying below and around said injection zone withstands and rejects dynamic and static weights exerted thereon by said built structures and by overlying and adjacent soil masses, and wherein the expansion of the injected substance is cry fast with a potential increase in volume of the expanded substance being at least five times the volume of the substance before expansion.

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