E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
61/64
E21D 11/08 (2006.01) F16L 9/22 (2006.01)
Patent
CA 1108875
ABSTRACT A tunnel lining comprises a plurality of arcuate segments connected to one another by connecting elements. Each connecting element protrudes from one segment and engages in a recess defined by an adjacent segment. Each recess is considerably larger than the connecting element and contains means for clamping the connecting element to one wall of the recess.
325235
Fetherstonhaugh & Co.
Sheridan Contractors (engineering) Limited
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