Albert A Mathews
Engineers in Auburn, WA
License number
Colorado 25892
Issued Date
Nov 21, 1988
Renew Date
Dec 1, 2000
Expiration Date
Dec 1, 2000
Type
Professional Engineer
Address
Address
PO Box 4039, Auburn, WA 98063
Professional information
Prestressed Tunnel Lining
US Patent:
4615644, Oct 7, 1986
Filed:
Jan 22, 1986
Appl. No.:
6/821284
Inventors:
Renon M. Hoge - Gates Mills OH
Albert A. Mathews - Federal Way WA
Albert A. Mathews - Federal Way WA
Assignee:
Mole Constuction Company - Solon OH
International Classification:
E21D 1102
US Classification:
405151
Abstract:
The invention provides a tunnel lining and a method of constructing the tunnel lining by aligning prestressed resilient lining panels of uniform thickness, such as plywood sheets, where longitudinal edges of the panels abut to form a ring. The longitudinal edges of the panel correspond to, and impose thrust against a second longitudinal edge of an adjacent panel. The thrust causes bending of the panels to form an arc about the longitudinal axis of the panels and to cause internal stresses within the ring to counteract loads applied at the exterior of the panels. The ring can consist of multiple layers of panels.