Consolidation construction for improving soft, unstable foundation

摘要

Consolidation construction for soft, unstable foundation for improving the bearing strength in order to fill earth thereon as in land reclaiming or to build structural construction thereon including dikes and roads. Examples of such unstable foundation requiring consolidation are: sea bottom with soft unsolid sedimentation heap as often referred to recently in Japan as HEDORO, muddy swamp land, layer of slimy industrial waste sludge of much water content and the like. Consolidation is effected on the spot by admixing hardening agent, such for instance as cement, with the slimy mud heap constituting the soft, unstable foundation. The construction is featured by a large number of consolidated walls juxtaposed one after another, each extending along the direction coinciding with the direction in which the maximum sliding, shearing rupture stress appears under the gravity load of the superstructure, namely the fill-soil or the edifice, built on the soft, unstable foundation improved by this consolidation construction; and ensures dynamically very stable consolidation effect, with quite large bearing strengths both for the vertical gravity load from the above and for the sliding, shearing rupture stress.