Importance

Loading Importance Indicators...

Abstract

A method of repairing foundations utilizes precast concrete cylinders which are sequentially driven into the soil and connected by tubular connectors to prevent deflection of the column which forms an underground pier. The tubular connectors maintain the cylindrical members in straight alignment during and after the driving operation and prevent shifting as a result of changing soil conditions. The present method relies upon the skin friction of the precast concrete pier with the soil for its strength. The precast concrete pier may be further strengthened by using hollow cylinders in forming the pier and adding concrete or mud pumped into its center and into the surrounding soil. The soil surrounding the precast concrete pier may be further stabilized and strengthened by pumping a lime, concrete, or mud slurry through the column into the soil surrounding the pile at critical areas where soil shrinkage and shifting often occurs. The present method has the advantage of being faster since the precast concrete cylinders do not have to cure and precasting allows better control of the concrete strength.

Loading the Abstract Image...

First Claim