Pipe compression ring

Details Pipe compression ring Pipe compression ring

1996-03-28

1998-12-01

Graysay, Tamara L.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Repair, replacement, or improvement

285335, E03F 304, F16L 100

Patent

active

058428178

ABSTRACT:
A compression or jacking ring includes a first component constructed of two layers of a material that is comparatively non-elastic and has a Poisson's ratio preferably not greater than 0.3. A second component that is comparatively elastic and has a comparatively high Poisson's ratio is sandwiched between sections of the first component. The compression ring is sized and shaped to be positioned between facing surfaces of pipe sections in a string of pipe sections utilized for forming a pipe within a pipe receiving tunnel. In particular, the compression ring is constructed to transfer a load between adjacent pipes during insertion of the pipes into a tunnel so as to spread the load over a comparatively large surface area if the pipe sections become non-axially aligned relative to one another during insertion so as to reduce the likelihood of breakage.

REFERENCES:
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patent: 4552485 (1985-11-01), Hammer
patent: 4898498 (1990-02-01), Akesaka
patent: 5165822 (1992-11-01), Hein
patent: 5316352 (1994-05-01), Smith
Kevin John Ripley, Ph.D.; Thesis, University of Oxford; Hilary Term, 1989; "The Performance of Jacked Pipes".
G.W.E. Milligan; K.J. Ripley; Proc.; 4th Int. Conf. on Trenchless Technology, London; Int, Soc. For Trenchless Technology; London, 1989; Paper 2.1; "Packing Material in Jacked Pipe Joints".
P Norris; G.W. E. Millgian; Proc., NO-DIG 92, Washington, D.C., N. Amer. Soc. for Trenchless Technology; Chicago, 1992; Paper H3; "Pipe End Load Transfer Mechanisms During Pipe Jacking".
Robert Lys, Jr., P.E.; Thomas M. Garrett, Ph.D.; Microtunneling Forces; The Pipe's Perspective; Underground Pipeline Engineering; Jun. 25-28, 1995.
No Dig Microtunneling Pipe; Division of MCP Industries, Inc.; Apr. 28, 1995 Brochure.
Pipe Bursting With No Dig Pipe Brochure.

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