JPH07127373A - Method and apparatus for constructing tunnel - Google Patents

Abstract

PURPOSE:To ensure smooth blasting for the excavated surface of a tunnel by applying adjustment only to two elements of forward and rearward sliding movement of a drill and the direction of a drifter. CONSTITUTION:A movable truck 16 is arranged movably on a guide frame 15, shaped similarly to the outer peripheral shape of a tunnel and attached to the foremost part of a truck main body 11. At least one drill 18 that is installed on the truck main body 11 and transferable to the movable truck 16 and at least one spray gun 22 installed likewise on the truck main body 11 and transferable to the movable truck 16 are put on drawing trucks 19, 20 and 21 that are slidably installed on the truck main body 11. As occasion demands, the drill and the spray gun are transferred selectively from the drawing trucks 19, 20 and 21 on the truck main body 11 to the movable truck 16 and put in operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a tunnel and an apparatus therefor, and more specifically, for example, a large number of holes are formed on a planned tunnel excavation line by a hole punching machine, and an explosive is charged into these holes. However, the present invention relates to a tunnel construction method and apparatus for mainly performing primary lining by cutting out rock excavating smoothly outside the planned excavation line so as not to damage it, and then spraying concrete or the like on the excavation surface.

[0002]

2. Description of the Related Art Conventionally, a tunnel construction device is generally called a jumbo, and a device having a gate type carriage body is called a gantry jumbo. For example, the short bench construction method and the mini bench construction method are mainly used for the construction of mountain tunnels and the like, and the gantry jumbo described above is partially used in the mini bench construction method. As shown in FIGS. 7 and 8, a conventional jumbo device includes a trolley main body 2 having a gate-shaped (gantry) section that can be moved forward and backward on a rail 1, and a support assembly is provided on the trolley main body 2. A work cage machine 3, a hole drilling machine 4, a spraying machine 5 and the like for carrying, for example, a charge and various materials are mounted.

The inside space 6 of the trolley body 2 having such a gate-shaped cross section serves as a passage and a working space for the loader and the dump truck, and the various machines described above on the trolley body 2 are the machines inside the trolley body 2. At the same time, work is being done to enable efficient excavation.

Specifically, for example, several boring machines 4 mounted on the bogie main body 2 are responsible for boring holes on the outer peripheral face A of the face as shown in FIG. A plurality of drilling machines 4 working in the section 6 were in charge of the cutting face central portion B, and each of these drilling devices 4 appropriately drilled the cutting face thereof.

The movement of the jumbo operates the jack device 7 provided at an appropriate position below the carriage body 2 to temporarily lift the carriage body 2 from the rail 1,
After that, the rail 1 which the trolley body 2 itself holds
Is moved forward with respect to the trolley body 2 by using an appropriate drive device, the jack device 7 is retracted again, the wheels of the trolley body 2 are placed on the rail 1, and the operation of advancing to the tip of the rail 1 with excavation is repeated. This is what you do.

[0006]

In such a conventional gantry jumbo, as described above, the entire cross section of the face is A-shaped.
The area is divided into the area B and the area B, and each area is drilled by several drilling machines. However, in the conventional arrangement of the boring machine using the jumbo, it is very difficult to perform the boring accurately along the planned excavation line and in the planned excavation direction, which causes a problem that there are many extra trenches.

That is, smooth blasting (drilling so that the excavation position is almost exactly on the planned excavation line and the excavation surface is relatively smooth) is used to control the excess of the tunnel to a minimum. It is necessary to do this, and for that purpose, the position and directionality of the tunnel outer peripheral hole are extremely important factors. However, the drilling machine is usually composed of a drifter for drilling, a guide cell and a boom for mounting the drifter, and the vertical position of the drilling machine is used to determine the position of the drilling machine and the drilling direction. , The left and right position, the rotation direction (direction), the front and rear sliding position, and the drifter direction must be adjusted accurately.

In the conventional drilling machine, for the adjustment of these five elements, seven drive or seven freely operating parts, that is, the moving parts of up and down, left and right, extension and rotation of the guide cell 4, and the boom 3 are used.
With respect to the above, a multi-joint mechanism having up, down, left and right, and extension and contraction operation parts is provided, and the operator appropriately determines each of these free operation parts. This adjustment relies solely on the operator's feeling, and accurate adjustment requires a high degree of skill, so if you try to quickly determine the drilling position and direction, the accuracy will decrease, and There was a problem that the tip position) of the hole was not aligned in the tunnel axis direction, the excavation cycle length changed, or irregularities were generated on the face face when the holes were charged and blown.

The object of the present invention is to solve the above-mentioned conventional problems, and to obtain smooth blasting by only adjusting the two elements, that is, the front-back sliding by a drilling machine and the direction of the drifter. (EN) Provided is a tunnel construction method and an apparatus therefor.

[0010]

The present invention is a tunnel construction method, and has the following constitution in order to solve the above-mentioned technical problems. That is, in the tunnel construction method of the present invention, the boring machine 11 is provided with the boring machine 18 and the spraying machine 22 mounted on the pulling carriages 19, 20 and 21 slidably mounted on the carriage body 11. A common moving carriage 16 movably arranged on the guide frame 15 having a shape similar to the outer peripheral shape of the tunnel arranged on the face side.
The hole boring machine 18 transferred to the moving carriage 16 forms a large number of holes in the face along the planned tunnel excavation line by the movement of the moving carriage 16 and thereafter, Primary lining in the tunnel by the spraying machine 22 transferred to the moving carriage 16 in lieu of the piercing machine 18 during or after the blasting by charging explosives into the piercing hole to explode. It is characterized by performing.

Further, the present invention is a tunnel construction device,
As its configuration, the guide frame 1 having a shape similar to the outer peripheral shape of the tunnel attached to the frontmost portion of the bogie main body 11
5, a movable carriage 16 movably arranged on the guide frame 15, and at least one drilling machine 1 mounted on the carriage main body 11 and capable of transferring to the movable carriage 16.
8 and the movable carriage 16 mounted on the carriage main body 11.
At least one spraying machine 22 that can be transferred to the carriage, and the drilling machine 18 and the spraying machine 22 are respectively mounted on the retractable carriages 19, 20, 21 slidably mounted on the carriage main body 11. The boring body 11 is selectively operated by the boring machine 18 and the spraying machine 22 as needed.
From the upper pulling carriages 19, 20, 21 to the moving carriage 16
It is characterized by moving to and operating.

[0012]

According to the tunnel construction method of the present invention, the drilling machine and the spraying machine mounted on each of the retractable carriages slidably mounted on the carriage main body are provided on the outer circumference of the tunnel on the face side of the carriage main body. It is possible to selectively transfer to a common moving carriage that is movably arranged on a guide frame having a shape similar to the shape.

First, a boring machine is transferred to the moving carriage from the drawing carriage, and by moving along the guide frame of the moving carriage, a large number of drilling holes are formed in the face along the planned tunnel excavation line and at predetermined intervals. To do. Then, explosives are loaded into each drilled hole to explode, and sliding is performed in accordance with the usual method.
The boring machine mounted on the moving carriage is returned to the top of the retracting carriage mounted on the main body of the truck, and instead, the spraying machine is transferred from the retracting carriage to the moving carriage.

A primary lining is carried out by moving a moving carriage on which a spraying machine is mounted during or after the slide-out to spray concrete on the inner surface of the excavation tunnel. When this primary lining is completed, the spraying machine is returned from the moving carriage to the retracting carriage again, and instead, the boring machine is transferred from the retracting carriage to the moving carriage and returns to the first step.

In the construction apparatus of the present invention, since the whole boring machine moves along the planned excavation outer peripheral line of the tunnel, it is not necessary to adjust the vertical position, the lateral position and the rotating direction, and the front and rear position and the direction of the drifter are eliminated. Drilling can be performed in the correct direction simply by adjusting.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The tunnel construction apparatus of the present invention will be described below in more detail with reference to the embodiments shown in the drawings. 1 and 2
The whole of the tunnel construction apparatus 10 according to the embodiment of the present invention is shown in FIG. Such a tunnel construction device is called a jumbo as described above. The tunnel construction device 10 according to this embodiment is particularly referred to as a gantry jumbo because it is provided with the gate type carriage main body 11. The trolley body 11 is provided with a moving means at its lower portion as in the conventional one.

This moving means is a rail 12 held by the bogie main body 11 itself and extending in the tunnel axis direction, and a plurality of wheels provided on both sides of the lower part of the bogie main body 11 so as to be movable on the rail 12. 13, a driving device (not shown) such as a hydraulic motor for rotating at least one of the wheels 13, a bogie body 11 for temporarily lifting the wheel 13 from the rail 12 when moving the rail 12 forward or backward. It is mainly configured by a hydraulic jack device 14 provided on the side of the rail, a drive device (not shown) for moving the rail 12 forward or backward, and the like.

A guide frame 15 having a shape similar to the outer peripheral shape of the tunnel is attached to the upper half of the front part of the bogie main body 11. The shape of the guide frame 15 in this embodiment is an arch shape as is clear from FIG. The guide frame 15 includes two H-shaped arched frame members 15a and 15b arranged in parallel in the front and rear direction on the outer peripheral side and the inner peripheral side as shown in an enlarged view in FIGS. It is formed by connecting and fixing with the plates 15c and 15d arranged at.

Two movable carriages 16 are attached to the guide frame 15 so that the movable carriage 16 can move using the guide frame 15 as a rail. Since each moving carriage 16 has the same configuration, one of the moving carriages 16 will be described in detail. The moving carriage 16 includes a pedestal 16a located on the plate 15c and both sides of the pedestal 16a along the front and rear surfaces of the guide frame 15. The hanging flange 16b and the rotating shaft are rotatably supported by being rotatably supported by the flanges 16b, respectively.
Guide rollers 16c positioned in the side grooves 15e of the shaped frame members 15a, 15b, as well as each flange 1
6b is rotatably supported and has an H-shaped frame member 15a,
The side roller 16d is in contact with the side surface of the side groove 15e of 15b.

The moving carriage 16 further includes a hydraulic motor 16e attached to the lower end of the one flange 16b,
The pinion 1 is attached to the rotary shaft extending from the hydraulic motor 16e.
6f is attached, and this pinion 16f meshes with the rack 15f attached to the inner peripheral side plate 15d that constitutes the guide frame 15. As a result, the moving carriage 16 can freely move along the guide frame 15 by operating the hydraulic motor 16e.

As shown in FIG. 4, flanges 16h having grooves 16g formed on the inner surface thereof are provided at both ends (the ends in the moving direction) of the upper surface of the pedestal 16a constituting the moving carriage 16. The groove portion 1 of the flange portion 16h facing each other
6g functions as a guide slot when a yoke base 17 described later is transferred onto the pedestal 16a, and both sides of the support plate 17a forming the yoke base 17 are inserted.

The yoke table 17 is designed to mount a hole punching machine 18 directly on a supporting plate 17a thereof for fixed support, and the supporting plate 17a is provided with an appropriate mounting plate 17b for that purpose.
The boring machine 18 is fixed by an appropriate means using the support plate 17a, the mounting plate 17b, etc. (FIG. 2). Of course, the fixing may be removable. 4 and 5, the boring machine attached to the yoke base 17 is omitted.

On the other hand, at the top of the carriage main body 11, as shown in FIGS. 1 and 2, three retractable carriages 19, 20 and 21 are slidably arranged at the center and both sides thereof. Retractable trolley 19 arranged in the center of the trolley body 11
Is for moving the spraying machine 22 to the retracted position behind the carriage main body 11, and the other two retractable carriages 20 and 21.
Are for moving the two boring machines 18 described above to the retracted position behind the bogie body 11.

Since the pull-in carriages 20 and 21 on which the boring machine 18 is mounted are the same, only one of the pulling carriages 20 will be described. The retractable carriage 20 is slidably mounted on two guide rails 23a and 23b fixed to the carriage main body 11, and a hydraulic motor 24 mounted on the retractable carriage 20.
And the guide rail 23a by the chain 25 for transmitting the rotational force to the wheels of the pull-in carriage 20 and the like.
Slide on 23b.

A pedestal 26 for mounting the boring machine 18 is attached to the front end of the retractable trolley 20, and the upper portion of the pedestal 26 is the upper surface of the pedestal 16a of the movable trolley 16 sliding on the guide frame 15. It is configured in exactly the same way. Therefore, when the retracting carriage 20 is adjacent to the moving carriage 16 and is positioned so that the upper surface of the receiving stand 26 and the upper surface of the pedestal 16a of the moving carriage 16 are substantially flush with each other, the yoke to which the boring machine 18 is attached is attached. The table 17 slides so that both can freely come and go.

A hydraulic cylinder device 27 for moving the yoke base 17 back and forth is attached to the retracting carriage 20 via a base 28. This hydraulic cylinder device 27
As a configuration in which the yoke base 17 is slid by the piston rod 27a in FIG. 5, a U-shaped connecting box 29 that opens rearward is attached to the rear part of the yoke base 17 as shown in FIG.

The connecting box 29 is a hydraulic cylinder device 27.
The tip end of the piston rod 27a is attached to a position where it can enter inward from the open portion. A lock hydraulic cylinder 30 is further attached to the upper part of the connecting box 29, and the piston rod 30a thereof enters into the connecting box 29 so as to cross the central axis of the piston rod 27a of the hydraulic cylinder device 27. It is growing.

As a result, when the yoke base 17 to which the hole drilling machine 18 is attached is moved, the hydraulic cylinder device 27 provided on the retracting carriage 20 is operated to attach the tip end portion of its piston rod 27a to the yoke base 17. Into the connection box 29, and then the lock hydraulic cylinder 3
0 is operated to bring the end portion of the piston rod 30a into contact with the piston rod 27a of the hydraulic cylinder device 27 so as to engage each other.

As a result, the piston rod 27a of the hydraulic cylinder device 27 and the yoke base 17 are firmly connected. Therefore, thereafter, the yoke base 17 can freely move back and forth by the expansion and contraction operation of the piston rod 27a. If the lock hydraulic cylinder 30 is released after the yoke base 17 is mounted on the movable carriage 16, the piston rod 3
0a is separated from the yoke carriage 17, and the movable carriage 16 can freely slide on the guide frame 15.

A hydraulic oil tank 31 is mounted on the pull-in carriage 20. The hydraulic oil tank 31 includes a hydraulic cylinder device 27 for moving the hydraulic motor 24 for moving the pulling carriage 20 and the yoke base 17 for self-propelling.
It is installed to circulate hydraulic oil.

By the way, the boring machine 18 attached to the yoke stand 17 is placed on the receiving stand 26 of the retracting carriages 20 and 21 when not in use, and the retracting carriages 20 and 21 are located at the rear retracted position of the carriage body 11. It has been moved. Then, at the time of use, the retracting carriages 20 and 21 are moved forward so that the receiving stand 26 comes close enough to contact the moving carriage 16 on the guide frame 15, and the yoke stand 17 is pushed out by the piston rod 27a of the hydraulic cylinder device 27. Then, the mobile carriage 16 is transferred onto the mount 16a.

For this purpose, as already described, the gantry 1 of the moving carriage 16 is set in the transfer operation position of the drilling machine 18.
6a and the pedestal 26 of the retracting carriages 20 and 21 (to be precise, the groove portions of both side flange portions into and out of which the side edge portions of the support plate 17a of the yoke base 17 come in and out) must be located on the same plane.

However, as is apparent from FIG. 3, since the guide frame 15 has an arched shape, the mount 16a of the movable carriage 16 inclines at positions other than the central portion. for that reason,
As shown in FIGS. 3 and 6, when the moving carriage 16 is at the set stop position for moving the drilling machine 18, the retracting carriage 20 is adjusted so as to match the inclination and height of the platform 16a. , 21 and the pedestal 26 and the pedestal 2
The inclination and height of each upper surface of No. 8 are designed.

Next, the retracting carriage 19 for the spraying machine 22 arranged between the two retracting carriages 20 and 21 for the boring machine is basically the same as the retracting carriages 20 and 21. , Guide rails 32a, 32b installed on both sides
Is slidably mounted on the pedestal, and the pedestal 3 is attached to the upper end of the pedestal.
3, a hydraulic cylinder device 34 is installed in the central part, a hydraulic motor 35 is installed in the rear part, and a hydraulic oil tank 36 is installed.

However, since the retracting carriage 19 is located in the center of the carriage body 11 as described above, the mount 16a of the moving carriage 16 at the transfer position of the guide frame 15 to the moving carriage 16 is substantially horizontal. . Therefore, the respective upper surfaces of the pedestal 33 installed on the retractable carriage 19 and the pedestal 37 for the hydraulic cylinder device 34 are designed to be substantially horizontal in accordance therewith.

The spraying machine 22 is also fixed to and supported by another yoke base 17 having the same shape as the drilling machine 18. Therefore, the spraying machine 22 can be transferred to the moving carriage 16 on which the drilling machine 18 has been lowered. When all of the yoke bases 17 that fixedly support the boring machine 18 and the spraying machine 22 are transferred to the frame 16a of the moving carriage 16, and the pulling carriages 19 and 2,
A locking hydraulic cylinder 38 is attached so as not to accidentally drop off when the vehicle is moved to the cradle 26 of 0 or 21.

The lock hydraulic cylinder 38 is inverted on the support plate 17a of the yoke base 17 so that the piston rod 38a thereof can penetrate the support plate 17a and extend downward as clearly shown in FIG. And is installed.
On the other hand, the pedestal 16a of the movable carriage 16 and the retractable carriage 19,
On the upper surface of each of the receiving bases 26 of 20 and 21, the tip end of the rod 38a is fitted on the axis of the cylinder rod 38a of the lock hydraulic cylinder 38 extending at a predetermined stationary position when the yoke base 17 is transferred to each of them. A locking hole is provided.

As a result, the yoke stand 17 is moved to the movable carriage 16
Of the piston rod 38 by operating the lock hydraulic cylinder 38 at a predetermined stationary position.
By extending a and inserting the tip end portion into each locking hole, the yoke base 17 is moved to the moving carriage 1 of the transfer destination.
7 or the pedestal 26.

In addition, the above-described drilling machine 18 and spraying machine 2
2 itself is a known one, and the drilling machine 18 is composed of a drifter and a guide cell. In addition, the spraying machine 22 includes a spraying nozzle 22a and a nozzle expansion / contraction jack 2.
2b, a nozzle direction operation lever 22c, and the like.

The operation of the tunnel construction apparatus 10 of the present embodiment thus constructed will be described in detail later, but generally, the movement of the arch-shaped guide frame 15 provided in the front part of the carriage main body 11 is moved. The boring machine 18, which has been transferred to the bogie 16 from the pulling bogies 20 and 21, forms a large number of boring holes at predetermined intervals slightly inside the planned tunnel excavation line for the upper half A of the cutting face shown in FIG. And holes for radial rock bolts are formed.

In the lower half B of the face shown in FIG. 9, a dedicated drilling machine 40 for forming a large number of drilling holes at a predetermined interval slightly inside the planned tunnel construction line is provided on the carriage main body 11. It is installed in the lower half. Although the hole drilling machine 40 does not move as a whole, a large number of hole drilling holes are formed in the vertical direction by making full use of the seven articulated mechanisms of the hole drilling machine 40.

Further, the tunnel construction device 10 of this embodiment
2, the work cages 41 are supported by the trolleys 43 slidably installed on the guide rails 42a and 42b on both sides of the middle portion of the trolley body 11 in the height direction. It is made possible to perform various tunnel excavation work and inspection of the excavation surface. In addition, the inner space portion of the gantry body 11 is utilized as a passage and a work space for the loader and the dump truck as in the conventional case.

Next, the operation of the tunnel builder 10 according to the above embodiment will be described in detail. First, the cradle 2
The two bogies 20 and 21 on which the boring machine 18 is mounted on 6 and retracted to the rear position of the bogie body 11 are moved forward by the operation of the hydraulic motor 24, and the guide frame 1
Two mobile carriages 16 stopped in advance at the setting position 5
Approach.

At this time, the yoke base 17 has its supporting plate 17a.
The electromagnetic cylinder device for locking 38 attached to is in an operating state and is locked to the receiving table 26, so that it is released to make it movable. Then, the piston rod 27a of the hydraulic cylinder device 27 has already entered the connection box 29 of the yoke base 17 when the yoke base 17 carrying the hole drilling machine 18 is unloaded from the moving carriage 16 in the previous stage, and is connected. Since the lock hydraulic cylinder 30 attached to the box 29 is locked with the piston rod 30a, the hydraulic cylinder device 27 is operated to further extend the piston rod 27a, and the yoke base 17 is received. Two
6 is pushed out and transferred to the pedestal 16a of the moving carriage 16.

Next, the lock hydraulic cylinder 38 of the yoke base 17 is actuated to fix the yoke base 17 to the movable carriage 16, and then the other lock hydraulic cylinders 30 are deactivated, whereby the hydraulic cylinder device is released. 27 is released from the engagement with the piston rod 27a, and the piston rod 27a
Is drawn into the cylinder. As a result, the yoke base 17 holding the hole drilling machine 18 is completely disconnected from the connection relationship with the retracting carriages 20 and 21, and moves depending on the moving carriage 16.

The moving carriage 16 is provided with the hydraulic motor 1
By the operation of 6e, it moves along the guide frame 15, and during that time, a large number of drilled holes are formed in the face by the drilling machine 18 supported by the moving carriage 16 along the planned tunnel excavation line and at predetermined intervals. After that, explosives are loaded into each drilled hole to explode, and sliding is performed according to the usual method.
The moving carriage 16 is returned to the transfer position to the retracting carriages 20 and 21 at an appropriate time between the charging to the drilling hole and the start of sliding.

After that, the hole drilling machine 18 mounted on the moving carriage 16 is returned to the receiving table 26 of the retracting carriages 20 and 21 in the reverse order of the transfer order, and receives the drilling machine 18. Each of the retractable carriages 20 and 21 is self-propelled and the carriage body 11
It is returned to the rear evacuation position. Next, one of the two emptied moving carriages 16 moves to the top of the center of the guide frame 15 and stands by here to mount the spraying machine 22.

The retractable carriage 19 on which the spraying machine 22 is placed on the pedestal 26 is at the retracted position behind the carriage main body 11. Therefore, when the spraying machine 22 is in the use stage, the pull-in carriage 19 moves by itself and moves to the front of the carriage main body 11, and
6 is moved to the moving carriage 16. Spraying machine 2 after this
The transfer of No. 2 to the movable carriage 16 is exactly the same as in the case of the boring machine 18 described above, and therefore its explanation is omitted.

The spraying machine 22 transferred to the movable carriage 16
Performs a primary lining by spraying concrete or the like from the spray nozzle 22a along with the movement of the movable carriage 16 and spraying it onto the inner surface of the excavation tunnel. When this primary lining is completed, the spraying machine 22 is returned from the moving carriage 16 to the retracting carriage 19 again, and instead of this, the hole drilling machine 18 is installed in the retracting carriage 2.
Transfer from 0 and 21 to each mobile carriage 16 and return to the first step.

The device designated by the reference numeral 44 in FIGS. 1 and 2 is a support hoisting crane installed at the rear portion of the carriage main body 11, and the support work 45 lifted by the crane 43 is as described above. First, the work cage 42 transports the work cage 42 to the face, and the work person on the work cage 42 assembles it. Further, the charge of explosives into the drilled holes or the installation of rock bolts is also carried out by a worker on the work cage 42.

[0051]

As described above, according to the tunnel construction method and the apparatus thereof of the present invention, the outer periphery of the tunnel is drilled on the moving carriage of the guide frame having a shape similar to the outer circumference of the tunnel installed in front of the main body of the carriage. Because it is designed to move while carrying a dedicated drilling machine, in other words, moving along the outer peripheral shape of the tunnel,
Accurate drilling can be performed at least by adjusting the front-rear sliding position of the drilling machine during drilling and adjusting the rod direction.

As a result, although many adjustments were required when making a hole with a hole drilling machine, the drilling work becomes very efficient because only two elements need to be adjusted, and the drilling accuracy is improved. It is possible to improve. Further, since the spraying machine can also be moved along the outer circumference of the tunnel by using the moving carriage that moves the guide frame, it is possible to perform the spraying work efficiently and accurately, and this spraying work may occur conventionally. Rebound can also be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a tunnel construction device according to an embodiment of the present invention.

FIG. 2 is a plan view of the tunnel building device shown in FIG.

FIG. 3 is a front view of the tunnel building device shown in FIG.

FIG. 4 is a front view showing a movable carriage slidably attached to a guide frame which constitutes the tunnel building device shown in FIG. 1.

5 is a cross-sectional view of the mobile carriage taken along line AA of FIG.

6 is a front view showing the front end portion of the bogie body without the guide frame in the tunnel building device shown in FIG. 1. FIG.

FIG. 7 is a side view schematically showing a conventional gantry jumbo or tunnel building device.

FIG. 8 is a front view of the conventional tunnel building device shown in FIG. 7.

FIG. 9 is a front view schematically showing a face of an excavation tunnel.

[Explanation of symbols]

 10 tunnel construction device 11 bogie main body 12 rail 13 wheels 14 hydraulic jack device 15 guide frame 15a frame member 15b frame member 15c outer peripheral side plate 15d inner peripheral side plate 15e side groove 15f rack 16 moving bogie 16a frame 16b flange 16c guide roller 16d Side roller 16e Hydraulic motor 16f Pinion 16g Groove portion 16h Flange portion 17 Yoke stand 17a Support plate 17b Mounting plate 18 Drilling machine 19 Retracting carriage 20 Retracting carriage 21 Retracting carriage 22 Spraying machine 22a Spraying nozzle 22b Nozzle expansion and contraction nozzle 22c Lever 23a Guide rail 23b Guide rail 24 Hydraulic motor 25 Chain 26 Stand 27 Hydraulic cylinder device 27a Piston rod 28 Pedestal 29 Connection 30 Lock Hydraulic Cylinder 30a Piston Rod 31 Hydraulic Oil Tank 32a Guide Rail 32b Guide Rail 33 Cradle 34 Hydraulic Cylinder Device 35 Hydraulic Motor 36 Hydraulic Oil Tank 37 Pedestal 38 Lock Hydraulic Cylinder 38a Piston Rod 40 Drilling Machine 41 Working Cage 42a Guide rail 42b Guide rail 43 Carriage 44 Support work Lifting crane 45 Support work

Claims (2)

[Claims] 1. A drilling machine and a spraying machine, which are mounted on respective retractable carriages slidably mounted on a carriage body, have shapes similar to the outer peripheral shape of a tunnel arranged on the face of the carriage body. It is possible to selectively transfer to a common moving carriage that is movably arranged on a guide frame, and the boring machine transferred to the moving carriage moves a number of holes along a tunnel excavation planned line by the movement of the moving carriage. Form a hole in the face, and then charge each hole with explosive to explode,
A method for constructing a tunnel, characterized in that during slipping out or after slipping out, a primary lining in a tunnel is performed by the spraying machine that is transferred to the moving carriage in lieu of the boring machine. 2. A guide frame attached to the foremost part of the trolley body and having a shape similar to the outer peripheral shape of the tunnel, and a movable trolley arranged movably on the guide frame.
At least one drilling machine mounted on the carriage body and transferable to the moving carriage, and at least one spraying machine mounted on the carriage body and transferable to the moving carriage, Each of the boring machine and the spraying machine is mounted on a retractable carriage slidably mounted on the bogie body, and the boring machine and the spraying machine are selectively mounted on the bogie body as needed. A tunnel construction device, wherein the device is moved from a retractable carriage to the movable carriage to be operated.