Device for locally increasing soil bearing strength - for temporary foundations and counteracting settlement

摘要

Process for increasing locally the bearing strength of light soils in preparation for the laying of foundations which will eventually support a heavy load, also allows any settlement which may occur in the soil below the foundations to be compensated for. Its use avoids the necessity for driving piles where foundations may only be temporary, e.g. erection of large cranes. The process consists of sinking a rectangular box (4) open at both ends vertically into the ground. While the box is being sunk a lubricant is applied to its lower ends. The soil (3) which is enclosed by the box is compressed and compressible material is then placed on top under pressure and the foundation laid.