JP2001020691A - Tunnel freezing damage prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem of costs and a setting work time in the case where setting is performed as a double layer plate or spraying of a material is performed by setting a nonflammable waterproof heat insulation plate being a single layer plate body having minute water absorption, non-flammability and heat insulation. SOLUTION: A nonflammable waterproof heat insulation plate 1 is attached to a tunnel lining 2 by using an anchor bolt or the like. A spacer may be attached in order to secure a gap in a water passing purpose between a wall face and the nonflammable waterproof heat insulation plate 1. Thereby a cost can be reduced and a setting work time can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to preventing frost damage in a tunnel. Freezing damage is caused by water leakage from a lining in a cold zone tunnel. Icicles, side wall ice, ice floes, etc., are obstacles to traffic.

[0002]

2. Description of the Related Art Countermeasures have been taken by installing a multi-layer board as a waterproof heat insulating board or a plurality of materials in order in a hollow space inside a tunnel lining.

[0003]

In this case, a water-impermeable material,
A heat insulating material and a non-combustible material are appropriately combined, installed as a multi-layer plate, or sprayed with a material. Therefore, there was a problem in cost and installation work time.

[0004]

In view of the above, an object of the present invention is to provide a non-combustible waterproof and heat-insulating plate which is a single-layer plate having a small water absorption and a non-combustible and heat-insulating property.

[0005]

As a result, the cost can be reduced and the installation work time can be shortened.

[0006]

[Performance of waterproof insulation board] It is desirable that a single-layer non-combustible waterproof insulation board satisfy the following requirements. (A) The water absorption is 2 g / 100 cm ² or less. (B) The heat insulating property is a thermal conductivity of 0.03 Kcal / m · h ·
About ℃. (C) Non-combustible materials are non-combustible materials specified in Article 2, Item 9 of the Building Standards Act. (D) It has some flexibility and is easy to fit into the tunnel wall.

[0007]

[Installation of waterproof insulation board] The waterproof insulation board is installed on the tunnel lining using anchor bolts or the like. A spacer may be installed between the wall and the waterproof insulation board to secure a gap for the purpose of water flow.

[0008]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a tunnel. FIG.

[Explanation of symbols]

 1 Incombustible waterproof insulation board 2 Tunnel lining 3 Inside of tunnel

Claims (1)

[Claims] 1. A non-combustible waterproof and heat-insulating plate, which is a non-combustible and heat-insulating single-layer plate-like material, having a very small or zero water absorption, is installed continuously and in a plane on the inner space side of a tunnel lining. Device to prevent frost damage in tunnels.