JP2000328871A - Facilities for tunnel widening construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide facilities inclusive of a frame, which are for use in tunnel crushing and excavating work of the surrounding ground in order to widen an existing mountain tunnel, the frame being free from hindrance by crushed pieces and excavated pieces when it progresses. SOLUTION: Facilities for use in crushing of an existing mountain tunnel and excavation of the surrounding ground includes a protector 16, a frame, and a leading means 34. The protector 16 is arranged on a road surface in a tunnel 10, for defining a traffic passage. The frame has a device mounted thereon, which device is for use in crushing the tunnel and excavating the surrounding ground. The frame is arranged so as to be stretched across the protector and can travel on the road surface in the tunnel. The leading means 34 is arranged in the tunnel, for leading crushed pieces of the tunnel and excavated pieces of the surrounding ground on both sides of the frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility used for widening an existing mountain tunnel penetrating mountains and hills.

[0002]

2. Description of the Related Art In order to widen a narrow existing mountain tunnel, after crushing the existing tunnel and excavating the ground around the tunnel using mechanical devices or blasting, a cross section larger than the existing tunnel is formed at the excavation site. A new tunnel is constructed to replace the existing tunnel with the new tunnel.

When crushing the existing tunnel and excavating the ground around the tunnel, a traffic path surrounded by a protector for securing traffic of pedestrians, vehicles and the like is provided in the existing tunnel, and a breaker and a cutting machine are provided. A gantry on which a crushing and excavating device including a rock drill, a drilling machine and the like is installed and which can travel on the road surface of the existing tunnel is used.

[0004] Incidentally, there is an obstacle that the crushed pieces of the existing tunnel and the excavated pieces of the ground around the tunnel fall on the road surface in the existing tunnel, and these crushed pieces and excavated pieces hinder the traveling of the gantry. Was.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a facility including a gantry used for crushing the existing mountain tunnel and excavating the ground surrounding the tunnel, which is performed to widen the existing mountain tunnel. An object of the present invention is to provide a facility in which the progress of the gantry is not hindered by crushed pieces and excavated pieces.

[0006]

According to the present invention, a facility for crushing an existing mountain tunnel and excavating a ground around the tunnel for widening an existing mountain tunnel is provided on a road surface in the tunnel. A protector that defines a traffic path and a gantry on which a device used for crushing the tunnel and excavating the ground around the tunnel is installed, and is disposed so as to straddle the protector in the tunnel and travels on a road surface in the tunnel. A mount that can be provided and guide means disposed in the tunnel for guiding crushed pieces of the tunnel and excavated pieces of the surrounding ground to both sides of the mount, respectively.

The guiding means includes a discharge plate supported at a front portion of the gantry and a pair of first side guards disposed below the discharge plate and supported on both sides of the protector. A pair of first side guards that partially overlap the dump plate in a transverse direction of the tunnel, and are disposed below the first two side guards and supported on a road surface in the tunnel; And a pair of second side guards each partially overlapping the first side guards in the transverse direction.

The dumping plate is swingable about a transverse axis of the tunnel, and the first side guard is further supported by the second side guard, and is disposed in the axial direction of the tunnel. Can be movable.

The gantry can be run on a protector arranged in the tunnel, and has a front portion for guiding the crushed pieces and excavated pieces from the protector to both sides thereof. It may have guidance means. This guiding means may also be swingable about the transverse axis of the tunnel, like the dump plate.

[0010]

According to the present invention, an existing tunnel is crushed by using a crushing and excavating device mounted on a gantry or by using a blast mounted on the gantry as a working table, and the ground around the existing tunnel is crushed. When excavated, the falling crushed pieces and excavated pieces are guided to both sides of the gantry via the guiding means, so that the crushed pieces and the digging pieces are moved between the both sides of the gantry to the next crushing and excavation site. A necessary traveling path of the gantry can be secured.

[0011] When the guiding means is constituted by a discharging plate, a first side guard and a second side guard, the discharging plate and the first side guards below the discharging plate and the first side guards are provided. Since the guard and the lower second side guards partially overlap each other in the transverse direction of the tunnel, the crushed pieces and the excavated pieces can be removed by the dumping plate and the first side guard. And the second side guard can be guided to the side of the gantry along these in this order, and since the second side guard is supported on the road surface in the tunnel, the gantry It is possible to prevent the crushed pieces and excavated pieces after being guided to the side from entering the space between both sides of the gantry.

The excavating plate which can be swung around the transverse axis of the tunnel is swung from the horizontal state to the vertical state, so that the excavating plate may be scattered during excavation by blasting. The shield can be used as a shield, which can prevent the crushing and excavating device on the gantry and workers from danger.

[0013] Further, by supporting the first side guard on the second side guard, the supporting stability can be enhanced. In addition, since the tunnel can be moved in the axial direction, the positional relationship of the gantry after the movement with respect to the earth removal plate can be easily established.

[0014] In the case of a gantry capable of traveling on the protector, crushed fragments and excavated fragments that hinder the traveling thereof are removed from the protector to both sides by guide means supported at a front portion thereof. Can be.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a part of an existing mountain-shoe tunnel 10 and a new horseshoe-shaped horseshoe having a larger cross section than the existing tunnel 10 are newly constructed for widening the tunnel. A portion of the tunnel 12 is shown by imaginary lines.

The new tunnel 12 is an existing tunnel 10
That is, the lining is crushed and the surrounding ground 14
After excavating (FIG. 2), it is built along the excavation wall. If necessary, an invert 15 (FIG. 3) is installed as a part of the new tunnel 12.

In order to crush the lining of the existing tunnel 10 and secure the traffic at the excavation site of the surrounding ground 14,
A protector 16 for defining a traffic path in the existing tunnel 10
And a gantry 18 used for crushing and excavation (including excavation by blasting). The protector 16 and the gantry 18 form part of the equipment of the present invention used for widening the existing tunnel 10.

The illustrated protector 16 has an inverted U-shaped cross-sectional shape, and along the existing tunnel 10, the above-mentioned crushing / digging site and its front and rear (the left is the front in FIG. 2).
Extending over.

The protector 16 is disposed substantially at the center of the existing tunnel 10 in the transverse direction, and
Is fixed to the inner road surface 20 by, for example, bolting. The protector 16 can secure a work space above the protector 16 and has a size determined so that a person or a car can pass through. The protector 16 is moved in the existing tunnel 10 in the axial direction according to the movement of the crushing / digging point, that is, the advance. The movement is performed by removing the bolt.

The gantry 18 has a base plate 22 located above the protector 16 and a plurality (three pairs in the illustrated example) of columns 24 for supporting the base plate 22 on the road surface 20.

The base plate 22 has a rectangular planar shape extending in the axial direction of the existing tunnel 10. The base plate 22 has a width dimension larger than the protector 16, that is, the existing tunnel 10
Has a transverse length of

Each pair of columns 24 is located on both sides of the base plate 22 and faces both sides of the protector 16, respectively. Thereby, the gantry 18 is arranged so as to straddle the protector 16. A plurality of columns 24 on the side of the base plate 22
Are interconnected and reinforced by a reinforcing member 23 composed of a vertical member, a horizontal member and a diagonal member.

The base plate 22 of the gantry includes breakers, rock drills, and the like used for crushing the lining of the existing tunnel 10, excavating the surrounding ground 14, charging the surrounding ground 14, and the like.
A crushing / digging device (not shown) including an excavator, a drilling machine, and the like is installed. These devices are operated on the base plate 22 so that the lining and the ground 1
4 can have a crushing / digging action. Reference numeral 25 denotes crushed or excavated pieces that have fallen and accumulated on the top surface of the protector 16 in front of the base plate 22 due to the crushing / digging operation. Reference numeral 26 indicates a pair of ramps provided for an operator to move up and down the base plate 22. Reference numeral 27 denotes a retaining plate that functions to retain the crushed pieces or excavated pieces so as not to move forward when the crushed pieces or excavated pieces are removed by the below-described earth discharging plate 42.

A pair of wheels 28 for traveling on a rail and a pair of outriggers 30 are attached to the lower ends of the columns 24, respectively.

The wheels 28 are mounted on a pair of rails 32 laid on the road surface 20 and extending in the axial direction of the existing tunnel 10, and can roll on the rails. The two rails 32 are arranged on both sides of the protector 16 at a distance from the protector. Therefore,
The gantry 18 straddling the protector 16 has a rail 32
The vehicle can travel on the road surface 20 in the axial direction thereof with human power or mechanical power. The gantry 18 may be replaced with the road surface 2 without passing through the rail 32 in place of the illustrated example.
It may be one that travels directly on zero.

Further, the outrigger 30 can be extended downward at the lower end thereof to contact the road surface 20,
Thereby, the base plate 22 during the crushing / digging operation is
And reduce the load on the wheels 28 and rails 32.

The facility of the present invention used for the widening work of the tunnel further has a guiding means 34.

The guiding means 34 is used to move the crushed pieces or excavated pieces 25 generated and dropped by the
To the both sides 35 of. Thereby, the crushed pieces or excavated pieces 25 are prevented from accumulating on and near the rails 32, and the traveling obstacle of the gantry 18 due to this is avoided.

The guiding means 34 shown in the figure comprises a discharge plate 36, a pair of first side guards 38, and a pair of second side guards 40 (see FIGS. 2 and 3). The first and second side guards 38 and 40 are not shown in FIGS. 1 and 4 in order to avoid complication of the drawing.

The earth discharging plate 36 is disposed horizontally in front of the base plate 22 and is supported at the front of the base plate 22. Earth removal plate 36
Consists of a plow-shaped member 42 projecting forward in a mountain shape.

The plow-shaped member 42 removes the crushed pieces or excavated pieces 25 from the protector 16 to both sides while scooping the crushed pieces or excavated pieces 25 on the protector 16 when the gantry 18 moves forward.

The illustrated plow member 42 is supported at its rear portion on the front portion of the base plate 22 so as to be swingable about an axis extending in a transverse direction of the existing tunnel 10 (transverse axis). Reference numerals 37 and 39 (FIGS. 2 and 4) denote brackets provided on the front portion of the base plate 22 and the rear portion of the plow member 42, respectively, and partially overlapping each other.
Reference numeral 41 denotes a pair of brackets 3 facing each other.
7 and 7 show a plurality of pins penetrating the existing tunnel 10 in the transverse direction and defining the axis.

More specifically, the plow member 42 can swing between a horizontal state shown in which the front end faces forward and a vertical state in which the front end faces upward. When the plow-shaped member 42 is kept in the vertical state, the plow-shaped member 42 can be used as a shield that protects the worker on the base plate 22 and the above-mentioned device from flying of excavated pieces when excavating the surrounding ground 14 by blasting. The swinging movement of the plow member 42 can be generated manually or by actuation of, for example, a hydraulic jack (not shown).

As shown in FIG. 5, the first side guard 3
Each of the eighth and second side guards 40 is formed of a plate extending in the axial direction of the existing tunnel 10 and having a generally U-shaped cross section. First side guard 38
Has a shorter length dimension than the second side guard 40,
The first side guard 38 and the second side guard 40 are both arranged so as to bulge toward the side wall of the existing tunnel 10.

The first side guards 38 are respectively
It is supported on both sides 44 of the protector 16. In the illustrated example, the first side guard 38 is suspended at the upper end thereof at a position above the side portion 44 of the protector 16.

More specifically, the side 44 of the protector 16
A groove 46 extending in the longitudinal direction (the axial direction of the existing tunnel 10) is provided in the first side guard 38, and the upper end of the first side guard 38 is inserted into the groove 46. First side guard 38
A plurality of wheels 48 are attached to the upper end of the wheel at a distance from each other in the longitudinal direction, and the wheels 48 can roll in the axial direction in contact with the wall surface in the groove 46. . Thus, the first side guard 38 is hung on the side portion 44 of the protector 16 so as to be movable in the longitudinal direction.

Further, a plurality of wheels 50 and another pulley-shaped wheel 52 are rotatably supported at the lower end of the first side guard 38. The pulley-shaped wheel 52 and the wheel 50 are rotatably supported by a shaft member 49 extending in the transverse direction of the existing tunnel 10 and another shaft member 53 fixed to one end of the shaft member and extending in the vertical direction. . The shaft member 49 is fixed to the lower end of the first side guard 38 at the other end, and is supported above the first side guard 38 via a support member 55 at an intermediate portion thereof.

The wheel 50 is in contact with the side portion 44 of the protector 16 so as to be able to roll in the longitudinal direction, and the wheel 52 is mounted on the upper end of the second side guide 40 so as to be able to roll in the longitudinal direction. ing. Thereby, the posture of the first side guard 38 with respect to the protector 16 is stably maintained.

The first side guard 38 is located below the earth discharging plate 36 supported by the base plate 22 because it is supported by the side portion 44 of the protector. Further, the first side guard 38 is provided in the transverse direction of the tunnel,
Partially overlap (see FIG. 3). For this reason,
The upper part of the first side guard 38 is partially covered with the earth discharging plate 36, and the crushed or excavated pieces 25 scraped off by the earth discharging plate 36 travel along the first side guard 38 between the two rails 32. It is guided outside, ie between the first side guard 38 and the side wall of the tunnel.

The first side guard 38 can be positioned and moved by manually pushing it in the axial direction of the tunnel.

The lower part of the second side guard 40 is fixed to the road surface 20 by, for example, bolting (not shown).
It is fixed to. The position of the second side guard 40 can be changed by removing the bolt.

The second side guard 40 is located below the first side guard 38 and partially overlaps with the first side guard 38 in the transverse direction of the existing tunnel 10. Accordingly, similarly to the relationship between the earth discharging plate 36 and the first side guard 38, the second side guard 40 has a part thereof whose upper part is covered by the first side guard 38, and The crushed or excavated pieces 25 that fall along the second side guard 40 are guided between the second side guard 40 and the side wall of the tunnel. Thereby, it is possible to prevent the crushed pieces or excavated pieces 25 from falling to the rail 32 and the vicinity thereof, and to ensure the traveling of the gantry 18 along the rail 32.

6 and 7 in place of the gantry 18 shown in FIGS. 1 to 5, that is, the gantry 18 that can travel on the road surface 20.
As shown in the figure, a gantry 56 that can run on the protector 16, more specifically on the flat top 54 of the protector 16.
Can be provided.

The gantry 56 has a base plate. This base plate is the same as the base plate 22 of the gantry 18, and the same reference numeral 22 is given to the same to avoid duplication of description. Also,
For the same reason, when the other elements constituting the equipment having the gantry 56 are the same as those in the equipment having the gantry 18, the same reference numerals as those assigned to the elements constituting the equipment are used. A detailed description thereof will be omitted.

A plurality of running wheels 58 are mounted on the bottom surface of the base plate 22 of the gantry 56 so as to be in contact with the top portion 54 of the protector and to be able to roll it in the longitudinal direction.

The base plate 22 has a plurality of side members 60 arranged on both sides thereof at intervals from each other and fixed and extending downward. Each side member 60 terminates at a position above the road surface 20 so as not to contact the road surface 20.

Each side member 60 is provided with a plurality of wheels 62 (FIG. 7) which are in contact with the respective side portions 44 of the protector 16 and are capable of rolling in the longitudinal direction. The wheels 62 limit the movement of the base plate 22 in the width direction of the protector 16 so that the base plate 22 moves straight along the protector 16.

At the lower end of each side member 60, a pair of outriggers 30 is attached. Outrigger 30
As in the case of the gantry 18, the lower end can be extended downward to contact the road surface 20, thereby maintaining the stability of the base plate 22 during the crushing / digging operation and running Wheel 58 and protector 1
6 is reduced.

The equipment having the gantry 56 includes, in addition to the gantry 56, a protector 16 and a guiding means including only the earth discharging plate 36.

The earth discharging plate 36 falls onto the protector 16 and scrapes off the accumulated crushed pieces or excavated pieces 25 on both sides of the protector 16 when the gantry 56 moves on the protector 16 in the longitudinal direction. Thereby, traveling of the gantry 56 on the protector 16 can be ensured. Needless to say, the gantry 56 is different from the gantry 18,
First and second side guards 3 for eliminating falling of the crushed pieces or excavated pieces onto the rails 32 required by the equipment having the gantry 18 because they do not travel on the road surface 20
8, 40 are unnecessary.

The earth discharging plate 36 is, as in the gantry 18,
It can be maintained in a horizontal state and a vertical state, respectively, and can swing between these states.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a gantry and a part of a guiding means which form part of the equipment of the present invention.

FIG. 2 is a longitudinal sectional view of the equipment of the present invention.

FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a plan view of the equipment.

FIG. 5 is an enlarged cross-sectional view of the first and second side guards.

FIG. 6 is a longitudinal sectional view of another example of equipment.

FIG. 7 is a cross-sectional view taken along line 7-7 of FIG.

[Description of Code 8] 10 Existing Mountain Tunnel 12 New Tunnel 14 Surrounding Ground 16 Protector 18, 56 Mount 20 Road Surface in Tunnel 22, 24 Mount and Support of Mount 34 Guide Means 36, 38, 40 Dump Plate, First and second side guards

Continued on the front page (72) Inventor Mitsuo Masuda 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Headquarters in Tokyo, Japan (72) Inventor Yukio Kakiuchi 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Tokyo, Kumagaya Gumi Headquarters (72) Inventor Seiro Kitahara 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Tokyo Kumagaya Gumi Tokyo headquarters (72) Inventor Yoshiaki Ishida 4- 12-20 Nihonbashi Honcho, Chuo-ku, Tokyo Inside Sato Kogyo Co., Ltd. (72) Inventor Kozo Imaoka 4-12-20 Nihonbashi Honcho, Chuo-ku, Tokyo Inside Sato Kogyo Co., Ltd. (72) Inventor Yasuhiro Tanaka 4-12-20 Nihonbashi Honcho, Chuo-ku, Tokyo Sato Kogyo Co., Ltd. 72) Inventor Akira Komori 2nd Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. (72) Inventor Toshiharu Sakurai 2nd Sanbancho, Chiyoda-ku, Tokyo Tobishima Construction Co., Ltd. (72) Inventor Kensaku Ichikawa 2 Tobanjima Construction Co., Ltd., Sanbancho, Chiyoda-ku, Tokyo

Claims (6)

[Claims] 1. A facility provided for crushing an existing mountain tunnel and excavating the ground surrounding the tunnel, the protector being arranged on a road surface in the tunnel and defining a traffic path. A gantry on which a device used for crushing the tunnel and excavating the ground around the tunnel is installed, and the gantry is arranged so as to straddle the protector in the tunnel and can travel on a road surface in the tunnel; Guidance means disposed in the tunnel for guiding crushed pieces of the tunnel and excavated pieces of the surrounding ground to both sides of the gantry, respectively. 2. The guide means comprises: a discharge plate supported on a front portion of the gantry; and a pair of first sides disposed below the discharge plate and supported on both side portions of the protector. A pair of first side guards which are guards and partially overlap with the earth removal plate in a transverse direction of the tunnel, and are disposed below the first side guards and supported on a road surface in the tunnel; The facility of claim 1, comprising a pair of second side guards each partially overlapping the first side guards in a transverse direction of the tunnel. 3. The facility according to claim 2, wherein the dump plate is pivotable about an axis extending transversely of the tunnel. 4. The facility according to claim 2, wherein the first side guard is further supported by the second side guard and is movable in an axial direction of the tunnel. 5. A facility provided for crushing of an existing mountain tunnel and widening of ground surrounding the tunnel to widen an existing mountain tunnel, the protector being arranged on a road surface in the tunnel and defining a traffic path. A gantry on which a device used for crushing the tunnel and excavating the ground around the gantry is mounted on the protector and is operable on the protector, and is supported on a front portion of the gantry. Guiding means for guiding crushed pieces of the tunnel and excavated pieces of the surrounding ground from above the protector to both sides thereof. 6. The installation according to claim 5, wherein said guidance means is pivotable about an axis extending transversely of said tunnel.