Method and apparatus for tunnel lining
First Claim
1. A tunnel liner segment comprising a formed body having two end walls and two substantially parallel sidewalls, at least two pins extending from one sidewall intermediate its length in the median plane of the body and transverse to said sidewall, a like number of openings in the other sidewall each adapted to receive one of said at least two pins from two adjacent interfitting segments, friction locking means in each said opening permitting insertion of said at least two pins in said openings of adjacent segments and lockingly engaging the same against removal and urging said two adjacent segments into tight end to end engagement and a fracturable container of hardenable fluid plastic resin components in each said opening in an amount sufficient to fill completely the opening when a pin is inserted therein whereby when said pins are inserted in said openings, the friction locking member immediately engages said pin against removal and the fracturable container is fractured by said pin releasing and mixing the hardenable plastic resin components within said opening and around the pin and friction locking member to harden in situ therearound to hold the pin against removal and to seal the pin in said opening.
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Accused Products
Abstract
A method and apparatus for tunnel lining is provided made up of arcuate liner segments having a formed body with two end walls and two substantially parallel sidewalls, at least two pins extending from one sidewall intermediate its length in the median plane of the body and transverse to said sidewall, a like number of openings in the other sidewall each adapted to receive one of said at least two pins from two adjacent interfitting segments and locking means in said opening permitting insertion of said at least two pins in said openings of adjacent segments and lockingly engaging the same against removal and urging said two adjacent fittings into tight end to end engagement.
35 Citations
16 Claims
- 1. A tunnel liner segment comprising a formed body having two end walls and two substantially parallel sidewalls, at least two pins extending from one sidewall intermediate its length in the median plane of the body and transverse to said sidewall, a like number of openings in the other sidewall each adapted to receive one of said at least two pins from two adjacent interfitting segments, friction locking means in each said opening permitting insertion of said at least two pins in said openings of adjacent segments and lockingly engaging the same against removal and urging said two adjacent segments into tight end to end engagement and a fracturable container of hardenable fluid plastic resin components in each said opening in an amount sufficient to fill completely the opening when a pin is inserted therein whereby when said pins are inserted in said openings, the friction locking member immediately engages said pin against removal and the fracturable container is fractured by said pin releasing and mixing the hardenable plastic resin components within said opening and around the pin and friction locking member to harden in situ therearound to hold the pin against removal and to seal the pin in said opening.
- 10. A tunnel lining ring made up of a combination of parallelogram and trapezoidal shaped liner segments, each segment having two end walls and two parallel sidewalls, at least one pin extending from one sidewall intermediate its length in the median plane of the segment and transverse to said sidewall, a like number of openings in the other sidewall adapted to receive said at least one pin from an adjacent interfitting segment, friction locking means in said opening permitting insertion of said at least one pin in said opening and lockingly engaging the same against removal, and a fracturable container of hardenable fluid plastic resin components in each said opening in an amount sufficient to fill completely the opening when a pin is inserted therein whereby when said pins are inserted in said openings, the friction locking member immediately engages said pin against removal and the fracturable container is fractured by said pin releasing and mixing the hardenable plastic resin components within said opening and around the pin and friction locking member to harden in situ therearound to hold the pin against the removal and to seal the pin in said opening.
Specification