Thermal insulation, waterproofing and drainage system for tunnel of alpine region

Abstract

The invention discloses a thermal insulation, waterproofing and drainage system for a tunnel of an alpine region. The system comprises a tunnel arch wall, a tunnel invert and an invert filling layer and also comprises a waterproofing and drainage system of the arch wall and an internal drainage system of the tunnel, wherein the waterproofing and drainage system of the arch wall comprises a self-adhesive type waterproofing board, an annular blind pipe and a longitudinal water-permeable pipe for arch feet; the internal drainage system of the tunnel comprises a center drainage pipe, an inspectionwell, a longitudinal water-permeable pipe for an arch bottom, an unidirectional thermal insulation and drainage pipe and side ditches; and both the tunnel arch wall and the tunnel invert are internally provided with VIP thermal insulation and waterproofing boards. By arranging fully-covered VIP thermal insulation and waterproofing boards between primary support and secondary lining of the tunnelinvert, on the premise of ensuring the temperature in each water-permeable pipe, deeply-buried center ditches are lifted to shallow positions, thereby improving the safety of tunnel construction and greatly reducing the construction quantity; and in a new design scheme, VIP thermal insulation, waterproofing and drainage materials are adopted in the tunnel arch wall, so that the waterproofing and drainage capabilities and efficiency in the tunnel can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of drainage of railway tunnels, in particular to a heat preservation, waterproof and drainage system for tunnels in alpine regions. Background technique [0002] Such as figure 1 with figure 2 As shown, it shows the current design scheme of railway tunnels in cold regions using the design scheme of deep-buried central water ditch: [0003] The arch wall is waterproofed with EVA waterproof board and geotextile. The circular blind ditch is set outside the initial support of the tunnel, in a groove 1.2m away from the inner edge of the tunnel lining and 0.4m wide. The longitudinal spacing of the circular blind ditch is 6~ 12m; the tunnels are equipped with double-sided thermal insulation ditches, and the thermal insulation ditches are equipped with double-layer covers, and polyurethane insulation materials are filled between the double-layer covers; The buried ditch is placed below the freezing line, and the...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a thermal insulation and drainage system for tunnels in alpine regions, which solves the engineering hidden dangers, large amount of engineering, difficult construction, slow progress and time-consuming existing in the current methods of waterproofing, drainage and thermal insulation of railway tunnels in cold regions strength defect

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