Pipe compression ring
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United States of America Patent
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Dec 1, 1998
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N/A
app pub date -
Mar 28, 1996
filing date -
Mar 28, 1996
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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.
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