Patent
1976-10-07
1978-06-20
Taylor, Dennis L.
61 45R, E21D 700
Patent
active
040954331
ABSTRACT:
Structure for supporting the excavated wall of a tunnel comprises a plurality of unit pipe support members connected in end-to-end relation by pipe couplings with lap joints, or by flanges on the ends of the support members, to form a plurality of sub-assemblies which are then connected by a closure member to form a pipe support having a periphery substantially conforming to the periphery of the tunnel wall, and having ports through which the pipe support can be filled with mortar or concrete. The unit pipe support members are substantially the same size and shape for mass production from ductile cast iron or cast steel and are provided with integral reinforcing ribs.
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Honda Juntaro
Nagasaki Katsumi
Seto Yoshito
Yamamoto Minoru
Farley Joseph W.
Kubota Ltd.
Taylor Dennis L.
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