METHOD OF STRENGTHENING NATURAL SOFT GROUND, ARTIFICIAL FILLS MADE IN THE GROUND OR IN RECLAIMED LAND AND THE LIKE, FOR BUILDING HOUSES OR OTHER STRUCTURES.

摘要

A method of strengthening natural soft ground, artificial fills made in the ground or in reclaimed land and the like, for building houses, embankments, walls and other structures, which comprises in forming a section of pre-compacted granular column above the ground by providing a ring or a short length of a sheath around a hollow rod to the lower end of which a sboe is fitted, fixing a former made of sheet iron or steel around the said sheath and externally thereto, arranging granular materials such as crushed or broken stones, sand, gravel, brick bats, slag and the like with fibrous admixtures such as wood shavings, hemp fibres, if required, within the sheath in a compacted form, further compacting the said granular materials and the fibrous admixtures if used, if necessary, by fitting a vibrator on the former and by actuating the said vibrator, lowering the sec tion of pre-compacted granular column so formed into the ground or artificial fills by jetting and hammering, forming and lowering a second section of pre-compact-ed granular column as aforesaid on top of the said first section, repeating the sequence of these steps un-til the required depth of the column is attained and finally compressing the entire length of the pre-com-pacted granular column by applying force at the top of the column. if necessary.