JPS63189600A - Method of cooling inside of tunnel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Technical field of invention) The present invention relates to a cooling method within a sinus tract.

(Technical Background of the Invention) The inside of a tunnel in which high-voltage cables and the like are laid becomes extremely high temperature due to the heat generated by the cables due to electricity.

As a conventional method for cooling inside a tunnel, a method is known in which a blower is placed inside the tunnel to blow cooling air. However, this cooling method has the disadvantage that it is difficult to blow cooling air over the entire length of the tunnel, so a sufficient cooling effect cannot be expected, and furthermore, constant maintenance and inspection is required.

Therefore, the present applicant has proposed a method for cooling the inside of a tunnel (see Japanese Patent Publication No. 60-2593) in which a heat pipe is joined to the reinforcing steel and the reinforcing steel is used as a heat collecting medium, thereby effectively cooling the inside of the tunnel. Moreover, it made cooling possible at low cost.

(Problems with the background technology) By the way, cracks occur in the concrete walls that make up the tunnels after long-term use, and on the other hand, large water pressure from groundwater is applied to the walls of the tunnels. Therefore, when a crack occurs in a wall, groundwater enters the tunnel through the crack, causing adverse effects such as deterioration of the installed cables.

(Object of the Invention) An object of the present invention is to provide a method for cooling the inside of a tunnel, which can effectively cool the inside of a tunnel and can also effectively prevent groundwater from entering through cracks formed in the wall. be.

(Summary of the Invention) The present invention is characterized in that an introduction path is provided in advance on the wall of a tunnel to actively introduce groundwater into the tunnel, and the introduced groundwater is made to flow within the tunnel.

(Embodiments of the Invention) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIGS. 1A and 1B, 1 indicates a concrete tunnel, and this tunnel 1 is composed of side walls IA, IA, a top wall IB, and a bottom wall 1C. A pedestal 2 protrudes from the inner wall surface of the side walls LA, IA, and a high voltage cable 3 is laid on each pedestal 2.

An introduction pipe 4 is embedded in each side wall IA so as to penetrate in the thickness direction. These introduction pipes 4 are provided at equal intervals along the longitudinal direction of the tunnel l, and are buried so as to be inclined downward toward the inside of the tunnel l. A water receiver member 5 for receiving groundwater is attached to the inner wall surface of each side wall IA. The members 5 of these water receptacles are formed into a double-shaped cross section and are arranged along the longitudinal direction of the tunnel 1. One end of each water receptacle is fixedly supported at an arbitrary position of the member 5 via a wire mesh 7. Each guide vibro extends downward along the side wall LA, and the other end extends along the bottom wall LC to its center. There is a U-shaped flow groove 8 in the bottom wall Ic.
is provided along the longitudinal direction of the tunnel l, and the other end of the guide vibro is inserted into the flow groove 8.

Now, if groundwater is flowing in the vicinity of the tunnel I, the groundwater will be introduced into the introduction pipe 4 due to its water pressure. Therefore, the introduced groundwater is inside the tunnel 1 and the water receiver is member 5.
The flow flows into the flow groove 8, is guided by the guide vibro, and further flows into the flow groove 8.
flows into. The groundwater that has flowed into the flow groove 8 is discharged to the outside of the tunnel l through a drainage port (not shown) provided on the downstream side. Therefore, even if the high-voltage cable 3 generates heat when energized, the heat is dissipated by the heat of vaporization of the underground water, so the tunnel l
It is possible to cool the inside.

Furthermore, since groundwater is actively introduced into the tunnel 1 through the introduction pipe 4, even if a crack occurs in the side wall IA, etc., most of the groundwater will be introduced into the introduction pipe 4, following the predetermined route described above. It flows into the flow groove 8.

Therefore, since moisture does not adhere to the high-voltage cable 3, etc., deterioration thereof can be prevented.

In addition, since the guide vibro is supported on the water receiver member 5 through the wire mesh 7, the guide vibro is not clogged with pebbles or the like introduced together with groundwater.

Another embodiment of the invention is shown in FIG. That is,
In this embodiment, a disaster prevention trough 9 is disposed within the tunnel 1, and a high voltage cable 3 is laid within the disaster prevention trough 9. Flow pipes 10 are arranged, and each flow pipe 10 is communicated with an introduction pipe 4. A wire mesh 7 is provided inside the introduction pipe 4 to prevent pebbles and the like from entering the flow pipe 10.

Also in this embodiment, groundwater flows into the flow pipe 10 in the disaster prevention trough 9 in the tunnel 1 through the introduction pipe 4, so that the inside of the tunnel 1 (disaster prevention trough 9) can be cooled. Also,
If a fire occurs in the tunnel 1, the disaster prevention trough 9 can prevent the fire from spreading to the high voltage cable 3, and the underground water flowing through the flow pipe 10 can cool and heat the high voltage cable 3. Deterioration can be prevented.

(Effects of the Invention) According to the present invention, an introduction path for introducing groundwater is provided in the wall of the tunnel, and the groundwater introduced through this introduction path is made to flow within the tunnel. Not only can the inside of the tunnel be reliably cooled, but groundwater will not enter the tunnel through cracks, preventing deterioration of cables, etc. Moreover, since groundwater is simply allowed to flow, it is economically possible to cool the tunnel. can be cooled.

[Brief explanation of the drawing]

FIGS. 1(A) and 1(B) are a vertical cross-sectional view and a cross-sectional view schematically showing one embodiment of the method for cooling inside a tunnel according to the present invention, and FIG. 2 is a schematic diagram showing another embodiment of the present invention. FIG. 1-1-------Cinus, IA------m-Side wall. 3----------High voltage cable, 4----------1 Introductory pipe, 5-------1 Water receiver member, 6---------- --Guide pipe, 7--Wire mesh, 8--Flow groove, 9--Disaster prevention trough, (1 other person) 1 -------------1 Cave Encounter IA-----1 side wall 3-----11-1 high voltage cable 4-----Introduction vibe 5----- −−−− − Ice and [Su #A46−
------ --------Flow tube Figure 1 ``4・'-・

Claims (1)

[Scope of Claims] 1. A method for cooling inside a tunnel, characterized in that an introduction path for introducing groundwater is provided in a wall of the tunnel, and the introduced groundwater is made to flow within the tunnel. 2. An introduction pipe is buried in the wall, and the groundwater introduced through the introduction pipe is guided to a flow groove provided at the lower part of the tunnel. The method of cooling inside the sinus tract described.