초록 ▼

An internally reinforced extruded plastic pipe which is adapted for use as an underground infiltration, collection, or transport conduit for liquids and gases. The pipe is provided with at least one integral reinforcing stem and the critical mode of failure is buckling rather than deflection. The pi

An internally reinforced extruded plastic pipe which is adapted for use as an underground infiltration, collection, or transport conduit for liquids and gases. The pipe is provided with at least one integral reinforcing stem and the critical mode of failure is buckling rather than deflection. The pipe is not dependent upon surrounding backfill for lateral support as with conventional pipe or conventional reinforced pipe. The same amount of plastic is usable per lineal unit as is used in comparable conventional pipe sizes, however, the cross-section is redistributed, which achieves greater loading capacity.

대표청구항 ▼

An internally reinforced pipe for use in a buried environment comprising extruded synthetic resin thermoplastic having a modulus of elasticity no less than about 35,000 p.s.i., the pipe having wall means, defining the external shape of the pipe and internal reinforcing plate means having opposite en

An internally reinforced pipe for use in a buried environment comprising extruded synthetic resin thermoplastic having a modulus of elasticity no less than about 35,000 p.s.i., the pipe having wall means, defining the external shape of the pipe and internal reinforcing plate means having opposite ends thereof integrally formed with the wall means at connections thereto, the connections forming end contraints for the reinforcing plate means and said reinforcing plate means extending generally in a plane between said connections for substantially the full length of the pipe, said connections and the reinforcing plate means designed whereby to cooperatively act so that the design loading strength of the pipe is defined by the critical buckling strength of said reinforcing plate means so that when the pipe is used in buried environments the pipe provides a greatest resistance to loading failure upon orienting the plate means substantially parallel to the direction of maximum loading along the pipe whereby the critical mode of pipe failure is by buckling of the plate means rather than solely by deflection of the wall means and wherein said pipe exhibits semi-rigid response characteristics to loading therealong.