Method for coupling axially aligned tunnel sections and apparatu

Details Method for coupling axially aligned tunnel sections and apparatu Method for coupling axially aligned tunnel sections and apparatu

1976-06-30

1977-09-13

Shapiro, Jacob

Joints and connections

Interfitted members with external bridging piece

403305, E21D 1108

Patent

active

040473880

ABSTRACT:
A method for coupling together two generally axially aligned structures, preferably concrete tunnel sections, is disclosed. The method includes mounting coupling apparatus including coupling means having an outwardly facing socket with a tapered thread therein to a first structure, mounting a coupling tendon having a tapered threaded end dimensioned to mate with the socket to a second structure, coupling the tendon to the coupling means and applying an axial tension force to the tendon and coupling means. The method and apparatus enables coupling together of substantially misalignment structures which could not be accomplished if conventional cylindrical threads were employed.

REFERENCES:
patent: 2135812 (1938-11-01), Gray
patent: 3850000 (1974-11-01), McBean
patent: 3850535 (1974-11-01), Howlett et al.

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