METHOD FOR MAKING CEMENT/SOIL PILES IN CAVED-IN SOILS Russian patent published in 1996 - IPC

FIELD: civil engineering. SUBSTANCE: drill-mixer is deepened in soil with concurrent supply of clay mud to rock- fracturing tool in non-sagging stratum, and to nozzles of drill-mixer in non-sagging stratum down to the design pile depth. Cement slurry is fed through drill-mixer nozzles when withdrawn. Before mixing cement with water in slurry-mixer the cement is milled additionally in wet condition. Cement is aftermilled with sand or other inert filler before introducing in soil with clay particles exceeding 30 % in non-sagging stratum. EFFECT: increased bearing capacity of the piles like this. 2 cl, 5 dwg