Process for providing a foundation pile for alternating compressive and tractive stresses and a pile thus provided
AssigneeFondedile S.p.A.
InventorWolf Chitis
Life of this patent
Estimating the term…
Abstract
The invention is related to a process according to which at the end of reinforcement bars inserted in a pile a nearly cylindrical and elongated chamber is inserted in the ground, said chamber having rigid impervious walls as to the fluids tending to enter from the outside, while when injecting cement grout into said chamber through appropriate tubes, the side walls will break and allow for grout expansion into the ground. The injection operation can be repeated for several times after as many scavengings or washings of the chamber.
Claims6
A process for providing a foundation pile for alternating compressive and tractive stresses, comprising the steps of forming a bore in the ground, inserting in said bore an assembly of reinforcement bars, the lower end of which has secured thereto a chamber comprising two nearly flat discs vertically spaced apart from each other by a substantial distance, a perforated generally cylindrical and rupturable side wall extending between said discs and externally thereof an impervious coating, said assembly including at least two tubes extending into said chamber, casting concrete about said assembly and allowing it to set, whereupon injecting grout through at least one of said tubes into said chamber at such a pressure that the side walls of the chamber will break and the grout will expand laterally into the ground, then after a determined period, scavenging the chamber and then repeating said injections and scavenging until the volume taken up by the injections is minimized.
For use in a concrete foundation pile, an insert device comprising an assembly of reinforcement rods having at one end means defining a loading cell, the top and lower walls of which comprise nearly flat discs fixedly secured to said reinforcement bar and arranged at a substantial distance apart, and the side walls of said cell comprising a perforated rupturable wall covered by an impervious coating.
Dependencies are inferred from the claim text.