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Concrete repair of tubbings

a tubbing and concrete technology, applied in the field of lining, can solve the problems of affecting the impermeability of the same, damage to the lining, and rare use in practi

Inactive Publication Date: 2011-06-02
AGRU KUNSTSTOFFTECHNIK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0008]It is therefore the goal of the invention to avoid this problem by suitable measures, especially damage to the lining and impairm

Problems solved by technology

Although mechanical fixing would be possible, it is rarely used in practice due to high costs.
This leads to the problem in practice that as a result of the pressure exerted on the lining the lining is pressed into the recesses of the surface of the tubbings such as the erector cones and the screw pockets, which might lead to damage to the lining and thus to an impairment in the impermeability of the same.
Although the recesses can be filled, mortared or plugged, such a measure is very work-intensive because an inside surface of a tunnel made of tubbings usually comprises several thousand such recesses.

Method used

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Embodiment Construction

[0016]Reference is made at first to FIG. 1, which shows a schematic view of a tunnel profile, as was obtained by excavation by blasting or by special boring machines which drill a tunnel tube through the rock. The tunnel tube is then either provided with a layer of spray concrete or lined with tubbings 4. These concern prefabricated concrete parts which are lifted by special working machines to the tunnel tube and are screwed together. Erector cones 6 are provided for this purpose on the one hand, in which the mandrels of the working machines engage in order to enable handling with the heavy tubbings 4, and on the other hand trapezoid screw pockets 5 which are used for accommodating the connecting screws (also see FIG. 3). The tubbings 4 which are screwed together form a first shell 1, on which a water-impermeable lining 2 is subsequently fastened, mostly by means of gluing. The lining 2 concerns a flexible plastic material such as PVC, a flexible polyolefin, a softly set polyethyle...

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Abstract

A lining (2) for an inside surface of a tunnel, preferably the inside surface of tubbings, wherein it is provided in accordance with the invention that it comprises at least two layers of different tensile strength and extensibility.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]Applicant claims priority under 35 U.S.C. §119 of Austrian Application No. GM 285 / 2008 filed May 19, 2008. Applicant also claims priority and this application is a continuation under 35 U.S.C. §120 of International Application No. PCT / EP2009 / 056000 filed May 18, 2009, which claims priority under 35 U.S.C. §119 of Austrian Application No. GM 285 / 2008 filed May 19, 2008. The international application under PCT article 21(2) was not published in English.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a lining for an inside surface of tunnels, especially the inside surface of tubbings, according to the preamble of claim 1.[0004]2. Description of the Related Art[0005]In tunneling, excavation is performed either by blasting or with special tunnel boring machines. So-called tubbings are frequently used in mechanical tunnel construction with tunnel boring machines. These concerns prefabricated concrete par...

Claims

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Application Information

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IPC IPC(8): E21D11/00B32B7/022
CPCB32B27/12B32B5/024B32B7/12B32B27/304B32B27/32B32B2262/0253B32B2262/0276B32B2262/101B32B2262/106B32B2307/51B32B2307/54B32B2307/546B32B2307/726B32B2419/00B32B2581/00B32B2607/02B32B7/022
Inventor NEUMUELLER, WALTER
Owner AGRU KUNSTSTOFFTECHNIK
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