Method of connection

Details Method of connection Method of connection

1994-09-02

1996-02-06

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Lining

5239606, 52393, 404 74, 405151, E21D 1108

Patent

active

054891647

ABSTRACT:
The invention relates to a constructional element such as a tunnel lining, part of which is shown in the drawing, comprising adjacent segments which have facing surfaces between which there is a joint which is physically deformable under load. The joint comprises a toroidal body or tube of substantially circular cross section received in complementary or semi-circular facing recesses in the surfaces respectively, and comprises a flexible material such as polypropylene and which means in the form of a nozzle for gaining access to the interior of the body. The body is initially filled with a fluid, which could be a liquid or gas, through the nozzle, which can then be maintained in the body by closing the nozzle as by a valve. When round in which the tunnel is set has settled, the joint is "locked up" by passing a flowable settable material such as a cementitious mortar material from a grout pump into the body, which thereby displaces the fluid which passes out of the body through an outlet which may be part of the nozzle, may be a separate nozzle, or may be the bleed valve.

REFERENCES:
patent: 935376 (1909-09-01), Lennon
patent: 1881421 (1932-10-01), Coyle
patent: 2333826 (1943-11-01), Smith et al.
patent: 3695044 (1972-10-01), Hoshino et al.
patent: 4655638 (1987-04-01), Waring

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