Tunnel lining

Details Tunnel lining Tunnel lining

1977-06-15

1978-08-08

Shapiro, Jacob

61 84, 52 89, 52585, E21D 1108

Patent

active

041048857

ABSTRACT:
A concrete segment for a tunnel lining, having an end connectable to an end of another identical segment abutting thereagainst by means of connecting dowels insertable from an end of the segment remote from the abutting end thereof or from one side of the segment into two channels within the segments, each channel extending through an end of the segment and into the end of said abutting segment, the channels being disposed at an angle to one another whereby the segments are held together when the dowels are in position.

REFERENCES:
patent: 640473 (1900-01-01), Kupper
patent: 1381119 (1921-06-01), Hastings
patent: 2328823 (1943-09-01), MacKenzie
patent: 3786611 (1974-01-01), Brown et al.

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