E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
E21D 20/00 (2006.01) E21D 9/00 (2006.01) E21D 20/02 (2006.01) E21D 21/00 (2006.01)
Patent
CA 2286025
Cracks round a bore hole (19) are sealed while at the same time a rock bolt (20) is anchored in the bore hole by injecting a sealing material (23) through an injection nozzle. This comprises a sealing sleeve (10-14) with a through hole and a nonreturn valve device and is left in the bore hole after injection. The rock bolt (20) is inserted through the through hole of the valve nozzle and through the nonreturn valve device (16, 20). According to the invention, one sealing element of the non return valve device is formed of the rock bolt (20) and its other sealing element is formed of a sealing socket (16). This is pressed in a yielding and sealing manner against the rock bolt. The injection of the sealing material (23) is carried out through a gap (21) between the rock bolt and the sealing sleeve (10-14) and through the non return valve device (16, 20) during elastic deformation of the sealing socket (16).
Pour colmater les fissures autour d'un trou foré (19), alors qu'un boulon d'ancrage (20) est ancré dans le trou foré, on injecte un matériau de colmatage (23) au moyen d'une buse d'injection. Cette buse comprend un manchon étanche (10-14), pourvu d'un trou traversant et d'un dispositif de clapet antiretour, et elle est laissée dans le trou foré après l'injection. Le boulon (20) est introduit dans le trou traversant de la buse du clapet et dans le dispositif de clapet antiretour (16, 20). Selon l'invention, le boulon (20) constitue un premier élément d'étanchéité du dispositif de clapet antiretour et l'autre élément d'étanchéité est constitué d'une douille d'étanchéité (16). Cette dernière est comprimée en étanchéité contre le boulon. L'injection du matériau de colmatage (23) s'effectue à travers un espacement (21) entre le boulon (23) et le manchon étanche (10-14) et à travers le dispositif de clapet antiretour (16, 20), lors de la déformation élastique de la douille d'étanchéité (16).
Fetherstonhaugh & Co.
Skanska Anlaggning Ab
Skanska Sverige Ab
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