JP2001323800A - Tunnel ventilating method and apparatus for use therein - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel ventilating method and an apparatus therefor which can trace excavation is simple in construction and can prevent spread of particulate matter in a pit. SOLUTION: An air duct (1) is suspended from a ceiling of a tunnel (T), and an expandable air duct (2) is inserted into the air duct (1). The suction port (15) arranged at a rear portion of the air duct (1) is connected to an air blower (22) mounted on a carriage (21), and the tip of the expandable air duct (2) is opened to a tunnel excavated face (C), so that it is expanded according to the excavation, whereby ventilation takes place. When the expandable air duct (2) is expanded to a predetermined distance, the air duct (1) and the air blower (22) are advanced, and a following air duct (17) is additionally connected to the air duct (1). Further, the expandable air duct (2) is withdrawn into the interior of the air duct (1) and covered, and then blasting is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation method and an apparatus for use in tunnel excavation work.

[0002]

2. Description of the Related Art In a conventional tunnel ventilation system, if air is blown from a ventilation device on the ground to a vicinity of a face by a duct, dust is diffused in the tunnel, and the duct is continuously extended in accordance with excavation. Was not easy.

[0003] Therefore, Japanese Patent No. 2802579 discloses,
Japanese Patent Application Laid-Open No. H11-287100 discloses a technique in which a blower is installed on a trolley and air is sucked from a face of the shield machine through a suction pipe. Technology for adding wind tubes or Japanese Patent Laid-Open No. 10-1
No. 8798 discloses a technique in which a plurality of cylinders are nested and slidably extended to connect a moving air pipe and a fixed air pipe to follow the excavation.

However, these techniques involve mounting a wind pipe or a blower on a bogie following a shield machine in a shield construction method, and can be easily applied to ordinary tunnel excavation. Is not something that can be prevented.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tunnel ventilation method and a tunnel ventilation method capable of following a digging with a simple structure and preventing the diffusion of dust in a pit.

[0006]

A tunnel ventilation method according to the present invention is directed to a ventilation method used for tunnel excavation work.
Insert an expandable telescopic air tube inside the air tube, connect the end of the air tube to a movable blower, open the end of the air tube to an arbitrary location for tunnel excavation, extend it according to the excavation, and ventilate Perform (telescopic wind tube advance process).

[0007] When the telescopic air tube extends to a predetermined distance, the air tube and the blower are advanced to add a subsequent air tube (air tube advance step).

[0008] Further, the telescopic air tube is retracted into the air tube and covered with a lid to perform blasting (blasting step).

A tunnel ventilation device according to the present invention is a ventilation device used for tunnel excavation work, wherein a wind pipe is suspended from a tunnel ceiling and movably disposed, and a tip is opened at an arbitrary position in the wind pipe to perform excavation. A telescopic air tube, which can be extended together, is inserted, and the suction port at the end of the air tube is connected to a movable blower.

Therefore, according to the present invention, a ventilation device is constituted by the air tube, the telescopic air tube inserted into the air tube, and the blower connected to the end suction port of the air tube. The telescopic air tube follows the tunnel excavation by the advancing process, and the wind tube and the blower follow the advancing process in the air tube advancing process every time a predetermined distance is advanced, so that the air tube is continuously provided from the opening provided at the tip of the telescopic wind tube. Inhalation and ventilation can be performed without diffusion of dust.

In the case of blasting, the telescopic air tube is retracted, and the cover is closed to prevent invasion of flying stones and the like into the air tube.

Further, these air tubes are suspended from the ceiling of the tunnel and can be easily moved. For example, if a lighting device is attached, the burden of maintenance and repair of the equipment can be reduced.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire configuration of the ventilation device, in which a wind tube 1 (hereinafter, referred to as an outer tube) (for example, having a diameter of 1500 mm) extends from a tunnel ceiling T in a longitudinal direction of the tunnel.
A telescopic air tube 2 (having a diameter of, for example, 1200 mm) (hereinafter referred to as an inner tube) is slidably inserted in the longitudinal direction and suspended, and the end of the inner tube 1 has a face C (or an arbitrary portion in a tunnel). ).

As shown in FIGS. 2 and 3, the suspension structure of the outer and inner tubes 1 and 2 is such that the main rail 3 extends from the tunnel ceiling T through a plurality of hanger rollers 7 via a height-adjusting turnbuckle 11 to extend the tunnel. The outer rail 4 for the inner pipe is suspended from the main rail 3 by a plurality of hanger rollers 8 so as to be slidable along the main rail 3.

[0015] The outer tube 4 is attached to the outer rail 4.
Further, an inner rail 5 fixed to an upper portion of the inner tube 2 is slidably locked below the inner rail 2 along the outer rail 4. The portion of the inner tube 2 protruding from the outer tube 1 is movably locked to the main rail 3 via a plurality of hanger rollers 9. Note that a baby winch (not shown) or the like is used for sliding the outer and inner tubes 1 and 2.

At the lower ends of the outer tube 1 and the inner tube 2,
The lighting hanger rails 6, 6 are fixed to each other, and a plurality of hanging lights 12 and a floodlight 13 are suspended.

Returning to FIG. 1, a plurality of (three in the illustrated example) suction ports 15 are provided at the rear of the outer tube 1, and one of them (selected by the position of the inner tube 2) has Transport cart 2
The blower 22 mounted on 1 is connected, and is further exhausted out of the tunnel by the subsequent air duct 17 (see FIGS. 4 and 5). In addition, in FIG. 4, the code | symbol X has shown the highway of two lanes, and Y has shown the tunnel cross section of the Shinkansen, respectively.

With the above configuration, ventilation in the tunnel T
The air passes through the inner pipe 2 opened to the face C, passes through the outer pipe 1, is drawn out from the suction port 15 by the blower 22, and is discharged out of the tunnel by the subsequent wind pipe 17. Then, along with the excavation of the tunnel T, the inner pipe 2 is slid and extended along the rails 3 and 4, and is constantly ventilated from the face C (a telescopic wind pipe advance step). After excavating a predetermined distance (for example, 30 m) in this way, the suction port 15 is once removed, and the entire outer tube 1 is advanced along the main rail 3 and the blower 22 is advanced by the bogie 21 by a predetermined distance (wind tube advance step). At this time,
The inner tube 2 is returned into the outer tube 1. Then, the subsequent wind pipe 17 is added and connected, and ventilation and excavation are resumed.

In the case of blasting, the inner tube 2 is retracted into the outer tube 1 and a lid (not shown) is closed, so that invasion of stepping stones and the like into the tubes 1 and 2 is prevented (blasting step). .

[0020]

The present invention is configured as described above and has the following effects. (1) Dust can be prevented from diffusing because it is sucked into the air duct by the face which is the dust generation source. (2) The excavation can be followed by the telescopic wind tube at the tip. (3) Therefore, since a local ventilation blower is unnecessary, the number of noise sources is reduced, and the power cost can be reduced. (4) Since there is no diffusion of dust and there is no need to consider the exhaust gas of the face machine, the amount of ventilation air can be reduced. (5) A lighting fixture can be attached to the wind pipe, in which case the burden of maintenance and repair of the equipment can be reduced. (6) The extension of the device is of the slide type, and can be performed automatically except for driving the anchor.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a tunnel showing an overall configuration of the present invention.

FIG. 2 is a side view showing details of a slide wind tube.

FIG. 3 is a sectional view of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a plan view showing a rear part of a slide wind tube (blower connection part).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Outer pipe (wind pipe) 2 ... Inner pipe (expandable wind pipe) 3 ... Main rail 4 ... Outer rail 5 ... Inner rail 6 ... Hanger rail for lighting 7, 8 9 hanger roller 11 turnbuckle 12 hanging light 13 floodlight 15 suction port 17 follower air duct 21 bogie 22 blower T ··tunnel

Claims (4)

[Claims] In a ventilation method used for tunnel excavation work, an extendable telescopic air tube is inserted into an air tube, an end of the air tube is connected to a movable blower, and a tip of the telescopic air tube is excavated in a tunnel. A tunnel ventilation method, characterized by opening at an arbitrary location of the tunnel and extending it in line with the excavation to perform ventilation. 2. The tunnel ventilation method according to claim 1, wherein when the telescopic air tube extends to a predetermined distance, the air tube and the blower are advanced to add a subsequent air tube. 3. The tunnel ventilation method according to claim 2, wherein the blast is performed by retracting the telescopic air tube into the air tube and closing the air tube. 4. A ventilation device used for tunnel excavation work, wherein a wind pipe is suspended from a tunnel ceiling and movably disposed, and a tip thereof is opened at an arbitrary position in the wind pipe so as to be extensible according to excavation. A tunnel ventilation device wherein a wind pipe is inserted and a suction port at an end of the wind pipe is connected to a movable blower.