Pile and System for Repairing a Foundation

Abstract

A pile segment for building supports to level foundations, e.g., slabs, has a generally cylindrical body made of concrete, the outer vertical surface of the cylindrical body being comprised of alternating spaced crests and troughs.

What is claimed is: 
     
         1 . A pile segment comprising:
 a generally cylindrical concrete body having a first end, a second end, and a generally vertical, annular outer surface between said first and second ends, said outer surface comprising vertically extending, circumferentially spaced cogs defining vertically extending, circumferentially spaced, alternating crests and troughs, the vertical surface having an area of from about 250 to about 350 in 2 .   
     
     
         2 . The pile segment of  claim 1 , wherein said crests have radially outwardly facing surfaces, the cumulative area of said radially outwardly facing surfaces being from about 30% to about 70% of the vertical surface area of said body. 
     
     
         3 . The pile segment of  claim 1 , wherein the body has a weight of at least about 24 lbs. 
     
     
         4 . The pile segment of  claim 3 , wherein the body has a weight of about 26 lbs. to 30 lbs. 
     
     
         5 . The pile segment of  claim 1 , wherein the surface of the crests lie in the surface of a first imaginary cylinder circumscribing said crest surface and said troughs have radially inner surfaces which lie in the surface of a second imaginary cylinder circumscribing said trough surface, said first and second imaginary cylinders being concentric, said first imaginary cylinder having a greater diameter than said second imaginary cylinder. 
     
     
         6 . The pile segment of  claim 1 , wherein said cogs are equally circumferentially spaced. 
     
     
         7 . The pile segment of  claim 1 , wherein said body has a diameter as measured from a first crest surface to a second crest surface 180° displaced from said first crest surface of from about 5.0 to about 7.0 inches. 
     
     
         8 . The pile segment of  claim 7 , wherein said diameter is from about 5.5 to about 7.0 inches. 
     
     
         9 . The pile segment of  claim 1 , wherein each crest surface forms an arc having a circumferential length of from about 0.25 to about 1.0 inches. 
     
     
         10 . The pile segment of  claim 9 , wherein said arc has a circumferential length of from about 0.25 to about 0.7 inches. 
     
     
         11 . The pile segment of  claim 1 , wherein the troughs have radiused surfaces having a radius of from about 0.1 to about 0.25 inches. 
     
     
         12 . The pile segment of  claim 1 , wherein the distance between adjacent crest surfaces is from about 0.25 to about 1.0 inches. 
     
     
         13 . The pile segment of  claim 12 , wherein the distance is from about 0.25 to about 0.75 inches. 
     
     
         14 . The pile segment of  claim 1 , wherein said body has a height of from about 8.0 to about 14.0 inches. 
     
     
         15 . The pile segment of  claim 14 , wherein said height is from about 9.0 to about 13.0 inches. 
     
     
         16 . The pile segment of  claim 2 , wherein the distance between the crest surface and the innermost surface of the radiused trough is from about 0.063 to about 0.25 inches. 
     
     
         17 . The pile segment of  claim 16 , wherein the distance between the crest surface and the innermost surface of the radiused trough is from about 0.1 to about 0.035 inches.