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Frost damage proofed pile

  • US 4,585,681 A
  • Filed: 06/26/1984
  • Issued: 04/29/1986
  • Est. Priority Date: 06/03/1983
  • Status: Expired due to Fees
First Claim
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1. In a frost damage proofed pile installed in a frigid area where the pile is subjected to a frost heaving force, the improvement comprising a tubular sheath member fitted over the pile surface, said sheath member having a length longer than the thickness of an active or seasonally frozen soil layer of the terrain in which the pile is installed, at least a portion of said length defined by a series of ribs extending transversely outwardly of said sheath member relative to a lengthwise axial line as an extensible section, the lower end of said sheath member being secured to the pile at or below a position corresponding to the bottom region of said active or seasonally frozen soil layer, the upper end of the sheath member being secured to the pile at a position above the ground surface, and a fluid material being filled in a space defined between said pile and the sheath member.

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