Composition for improving strength of soft ground containing organic matter, and method of improving strength of soft ground by utilizing said composition

A method of improving the structural strength of soft ground containing organic matter utilizing a composition including at least cement, bentonite, water and a lightweight finely divided inert material, said method having improvement in combination therewith comprising:

• the steps of replacing at least one portion of the ground by consolidation injecting said composition at prescribed locations, said composition being self-consolidating in situ after injection, and as a consequence of said replacement and consolidation causing the surrounding portions of said ground that have not been replaced to be compressed so that ground water is squeezed from the soil that is dehydrated as well as consolidated and those portions become compacted so that in principle improvement is involved for the ground herewith as generally catagorized into compaction/dehydration, draining, solidification and substitution as four aspects thereof applied at the same time.