Method for preparing in-ground tunnel structures

E - Fixed Constructions – 21 – D

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E21D 9/00 (2006.01) E02D 29/00 (2006.01)

Patent

CA 2542535

The present invention provides an improved method for repairing in-ground tunnel structures (6). The method involves applying a first curable resin over a cementitious liner (18) which lines the interior wall surfaces (14) of the tunnel (6), drilling drainage holes (30) in the cementitious liner (18), and filling the drainage holes (30) with a second curable resin. The resins are allowed to cure and harden. The cured resins seal the wall surfaces (20) and drainage holes (30) to provide a composite tunnel structure (6) having high mechanical strength and resistance to fluid leaks.

La présente invention a trait à un procédé amélioré pour la réparation de structures de tunnel souterraines (6). Le procédé comprend l'application d'une première résine apte à la cuisson sur un revêtement à base de ciment (18) qui recouvre les surfaces intérieures des parois (14) du tunnel (6), le forage de trous d'évacuation (30) dans le revêtement à base de ciment (18), et le remplissage des trous d'évacuation (30) avec une deuxième résine apte à la cuisson. On permet le séchage et le durcissement des résines. Les résines séchées scellent les surfaces des parois (20) et les trous d'évacuation (30) pour la réalisation d'une structure de tunnel composite (6) présentant une tenue mécanique et une résistance aux fuites de fluides élevées.

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