A tunnel waterproofing method

E - Fixed Constructions – 21 – D

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E21D 11/00 (2006.01) E21D 11/10 (2006.01) E21D 11/38 (2006.01)

Patent

CA 2411273

To provide a waterproofing construction method with which excellent waterproofing capacity can be assured. A tunnel waterproofing method characterized in that a primary spray cement concrete is sprayed on the excavation surface of the tunnel, after which a waterproofing sheet having adhesiveness with a secondary coating cement concrete is installed on said primary spray cement concrete surface and a secondary coating cement concrete is established on said waterproofing sheet surface. A buffer-water conducting layer may also be established on said primary spray cement concrete surface and a multilayer waterproofing sheet having adhesiveness with the applied cement concete may also be installed as a waterproofing sheet.

L'invention concerne un procédé de construction imperméabilisée qui permet de garantir une excellente imperméabilisation. Ce procédé est caractérisé en ce qu'on pulvérise un premier béton de ciment pulvérisé sur la surface d'excavation du tunnel. Puis, on place une feuille imperméable présentant une adhésivité à un second béton de ciment de revêtement sur la surface dudit premier béton pulvérisé, et on ajoute un second béton de revêtement sur la surface de feuille d'imperméabilisation. On peut également disposer une couche conductrice d'eau tampon sur la surface du premier béton pulvérisé, et utiliser une feuille d'imperméabilisation multicouche présentant une adhésivité au béton appliqué comme feuille d'imperméabilisation.

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