JP4011526B2 - Tunnel inner wall repair method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for repairing an inner wall surface of a tunnel that has deteriorated due to long-term use, and an apparatus for carrying out the method.
[0002]
[Prior art]
In order to renovate the inner wall of the concrete lining of an aged tunnel, a cutting device has been fixed in the tunnel so that it can be transferred, and this cutting device cuts the inner wall surface of the tunnel by a predetermined thickness. After the cutting is completed, the cutting device is unfixed and moved to the next cutting position. Then, the cutting wall surface is again cut, and the cutting wall surface is cut in the tunnel length direction by repeating this step. A first carriage having a concrete spraying device and a lump-like cut material take-in chamber following this cutting device, and a second dolly having a cut material suction fan and a powder-like cut material collection chamber And a third carriage equipped with a mixer are sequentially arranged, and the cut object by the cutting device is collected by the suction fan through the suction pipe into the massive cut object collecting chamber and the cut object collecting chamber. It has been made to repair the tunnel wall by blowing the cutting wall by supplying ready-mixed concrete in the concrete spraying device from the mixer while (e.g., see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-61-75200 (pages 2 to 4, FIG. 1).
[0004]
[Problems to be solved by the invention]
However, according to such a method for repairing the inner wall surface of the tunnel, the cutting device cuts the inner wall surface portion while being fixed to the inner wall surface of the tunnel, and after the cutting, the fixing to the inner wall surface of the tunnel is released to the next cutting place. Since it must be relocated, there is a risk that the relocation work will require significant effort and labor, and the repair work may be hindered. Therefore, it is necessary to provide equipment for discharging cuts and stock yards, so that the cost of equipment rises and the cuts remain as waste. There was a problem that the processing was expensive and uneconomical.
[0005]
The present invention has been made in view of the above problems, and the object of the present invention is to efficiently renovate the inner wall surface of the tunnel and to effectively repair the inner wall surface of the tunnel by effectively using a cutting piece. The present invention provides a method for repairing an inner wall surface of a tunnel and a repair device therefor.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the tunnel inner wall surface repair method according to the present invention cuts an aged tunnel inner wall surface while moving the tunnel inner wall surface cutting machine in the tunnel length direction. The concrete cut is supplied to a mixer at the rear and mixed with cement milk or mortar to prepare ready-mixed concrete, and this ready-mixed concrete is placed on the cutting wall by the tunnel inner wall cutting machine. To do.
[0007]
further, How to repair the inner wall of this tunnel In tunnel inner wall cutting machine The concrete cuts on the inner wall surface of the tunnel cut by the above are gathered together by the removing means and sent to the rear conveyor, and continuously fed to the vibrating screen from this conveyor, and the cut pieces of the concrete cut not passing through the vibrating screen are boned. It supplies to a mixer as a material, It is characterized by the above-mentioned.
[0008]
Claim 2 The invention according to claim 1 is an apparatus for carrying out the above-described method for repairing the inner wall surface of a tunnel, an inner wall surface cutting machine for cutting the inner wall surface of the tunnel while moving in the tunnel length direction in the tunnel, and the inner wall surface cutting machine A collecting means for collecting the concrete cut material cut by the above, a mixer for kneading the collected concrete cut material with cement milk or mortar to produce raw concrete, and the raw concrete was cut by the inner wall cutting machine The ready-mixed concrete placing means for placing on the cutting wall surface is sequentially arranged rearward in the tunnel length direction.
[0009]
further, Tunnel inner wall repair device constructed in this way In the above tunnel wall cutting machine The concrete cutting object removing means for collecting the concrete cut material from the cutting wall surface and sending it to the collecting means is arranged between the collecting means and the collecting means.
[0010]
Claim 3 The invention according to the present invention is a preferred structure of the collecting means, wherein a hopper mounted on a carriage, a vibrating screen disposed on the hopper, and a concrete cut material discharged from the removing means are received and the vibrating screen is used. It is characterized by comprising a front inclined conveyor to be dropped and a rear inclined conveyor for receiving the cut pieces of the concrete cutting portion screened by the vibrating sieve from the vibrating sieve and transporting them backward.
[0011]
Claims 4 In the invention according to the invention, a storage cart on which a hopper for temporarily storing a concrete cut piece transported from the rear inclined conveyor of the collecting device is interposed between the collecting device and the mixer. A certain amount of concrete cut pieces are put into the mixer.
[0012]
And claims 5 In the invention according to the present invention, the mixer is mounted on a carriage, and the ready-mixed concrete prepared by the mixer is supplied from a supply port provided in the mixer to a cutting wall surface cut by a tunnel inner wall surface cutting machine. It is configured to be placed.
[0013]
[Action]
A cutting machine for cutting the inner wall of the tunnel made of concrete lining is installed in the aging tunnel to be movable in the tunnel length direction. As the structure of this cutting machine, for example, a rod that has a cutting bit attached to the lower end is moved down impactively and a hammer that is cut by striking the inner wall surface of the tunnel with the cutting bit is used in the tunnel length direction. It is arranged on a movable base so as to be able to reciprocate in the tunnel width direction, and moves forward while scraping the aging tunnel inner wall surface by a cutting bit.
[0014]
A collection carriage constituting the means for collecting the concrete cut material scraped off by the cutting bit following the cutting machine for the inner wall surface of the tunnel is disposed, and integrated with the collection carriage on the front side of the collection carriage. There is provided a concrete cut object removing means that moves to the center, and the concrete cut object is gathered from the cutting surface by this removing means and sent to the collecting cart. This collection trolley is provided with a vibration sieve, and the powdered concrete cut material is screened out from the concrete cut material to leave a concrete cut piece of a size suitable for use as a raw concrete aggregate, and the concrete cut piece is vibrated. Feed from the sieve side to the mixer side on the carriage that follows the collection truck.
[0015]
Cement milk or mortar is added to the mixer together with the above-mentioned concrete cut pieces as aggregates, and these are kneaded to prepare ready-mixed concrete, and the cut wall surface cut by the above-mentioned tunnel inner wall cutting machine from the ready-mixed concrete supply port. The concrete will be placed on the wall and the tunnel wall will be repaired.
[0016]
This refurbishment work advances from the tunnel inner wall surface cutting machine arranged on the leading side to the rear mixer carriage in succession following the cutting progress speed of the cutting machine on the tunnel inner wall surface, The tunnel inner wall is to be repaired, but if concrete cut pieces as raw concrete aggregate from the vibrating screen provided in the above collection cart are directly supplied to the mixer, it is necessary for preparation of ready concrete. When the amount of the concrete cut pieces is put into the mixer, the supply must be stopped, and it is necessary to take measures such as cutting work with the cutting machine on the inner wall of the tunnel, removing concrete cuts, and temporarily stopping the collection work. It becomes.
[0017]
Therefore, it is preferable to place a concrete cutting piece storage carriage between the collecting carriage and the mixer mounting carriage, and the concrete cutting pieces from the vibrating screen are temporarily stored in the hopper on the storage carriage. In addition, a fixed amount of concrete cut pieces according to the mixing ratio of cement milk or mortar from this hopper is put into a mixer to prepare ready-mixed concrete, and this ready-mixed concrete is placed on the cut wall to renovate the tunnel inner wall. The work is done efficiently.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. An apparatus for repairing a bottom surface t of an inner wall made of concrete lining of an aged tunnel T includes a cutting machine 1 for cutting the bottom surface t by a certain thickness, and , A removing means 2 for removing the cut concrete cut material from the cutting wall surface t ′ of the bottom surface t, a collecting carriage 3 as a collecting means for collecting the concrete cut material discharged from the removing means 2, and the collecting carriage 3 A storage cart 4 for temporarily storing the concrete cut pieces screened by the vibrating screen 31 disposed in the container, a concrete cut piece as an aggregate supplied from the storage cart 4, and cement milk or mortar. Mixing the mixer truck 5 equipped with the mixer 50 for kneading and preparing the ready-mixed concrete C, and the ready-mixed concrete C placed from the mixer 50 onto the cutting wall t ' The leveling means 6 is arranged in the tunnel T with the cutting machine 1 at the head and sequentially following the cutting machine 1. The “cutting” in the present invention is a concept including not only cutting but also “turning”, “cutting”, and “crushing”, and the inner wall surface of the tunnel is not only the side wall of the tunnel but also the top of the tunnel, The concept includes the bottom of the tunnel.
[0019]
As shown in FIGS. 1 to 3, the cutting machine 1 for cutting the bottom surface t of the tunnel T is formed by integrating the horizontal bases 10 and 10 that are long in the width direction of the tunnel T with a small distance in the front and rear by a connecting piece 10 ′. Are connected to the horizontal rails 11 and 11 which are fixed to the intermediate portions in the height direction of both side wall surfaces of the inner wall surface of the tunnel so as to be movable in the tunnel length direction. And the height of the base 13 with respect to the bottom surface t can be adjusted by suspending the base 13 on the height adjustment jacks 12 and 12 mounted on both sides of the horizontal base 10 so as to be movable up and down. A cutting hammer 14 is attached to the base 13 so as to be reciprocally movable in the tunnel width direction, and the bottom surface t of the tunnel T is scraped to a predetermined thickness by the cutting hammer 14.
[0020]
As a mechanism for moving the cutting machine 1 in the length direction of the tunnel T, rollers 15 and 15 that roll on the horizontal rails 11 and 11 are rotatably supported at both ends of the horizontal mounts 10 and 10, respectively. These rollers 15 and 15 are configured to be rotated by drive motors 16 and 16 attached to both side ends of the horizontal bases 10 and 10, respectively. The horizontal rails 11 and 11 do not have to be disposed over the entire length of the tunnel T, and each time the bottom surface t of the tunnel is cut by the cutting machine 1 by a length corresponding to the length of the horizontal rail 11. The horizontal rail 11 through which the cutting machine 1 has passed may be removed and added to the front horizontal rail 11.
[0021]
As shown in FIG. 3, the mechanism 17 for moving the base 13 up and down fixes and fixes the gate-shaped frame 17a on the upper surface of the central portion in the width direction of the base 13, while A motor 17b is installed on the motor 17b (shown in FIG. 2), and the upper end lower surface 17d of the portal frame 17a can be freely contacted and separated by the arc upper end surface of the elliptical cam plate 17c fixed to the rotating shaft of the motor 17b The base 13 is moved up and down by rotating the cam plate 17c by driving the motor 17b.
[0022]
Further, the radius from the rotation center of the cam plate 17c to the outer peripheral end surface on the long diameter side is set to a constant cutting depth at the bottom of the tunnel by the cutting hammer 14 and the bit 14b of the cutting hammer 14 upward from the bottom surface t of the tunnel not yet cut. The height adjusting jacks 12 and 12 are extended so that the bit 14b of the cutting hammer 14 is brought into contact with and supported by the tunnel on the bottom surface t of the uncut tunnel. When the major axis direction of the cam plate 17c is oriented horizontally, the gap corresponding to the cutting depth of the tunnel bottom by the cutting hammer 14 is provided between the upper surface in the minor axis direction and the lower surface of the portal frame 17a. It is formed so that a (gap) is provided. Instead of such a cam mechanism, a crank mechanism may be employed to move the base 13 up and down.
[0023]
On the other hand, support brackets 10a and 10a project from the upper surfaces of both sides of the horizontal base 10, and the height adjusting jacks 12 and 12 are placed on these support brackets 10a and 10a with their rods 12a facing downward. It is supported. The horizontal pins 12b, 12b fixed to the lower ends of the rods 12a, 12a are moved up and down respectively in the elongated holes 13b, 13b provided in the projecting pieces 13a, 13a fixed to the upper surfaces of the both sides of the base 13. The base 13 is suspended by the height adjusting jacks 12 and 12 so that it cannot be moved further downward by locking these horizontal pins 12b and 12b to the upper ends of the vertically long holes 13b and 13b. I support it. The lengths of the vertically long holes 13b, 13b provided in the projecting pieces 13a, 13a are longer than the cutting depth by the cutting hammer 14.
[0024]
On the lower surface of the base 13, a guide rail 18 formed integrally with the surface shape in the width direction on the tunnel bottom surface t is integrally provided. For example, in FIG. 3, since the surface of the tunnel bottom surface t is formed in a concave arc shape, the guide rail 18 also has a convex arc shape from both ends toward the center so as to be parallel to the bottom surface of the concave arc shape. It is formed on a curved rail. The upper end of the cutting hammer 14 is locked to the guide rail 18 so as to be movable in the tunnel width direction.
[0025]
The moving mechanism 7 of the cutting hammer 14 is provided with a traverse jack 7a at the center of the upper surface of the base 13, and a pulley 7b at the tip of a piston rod projecting from both ends of the traverse jack 7a. 7b is rotatably supported, and a plurality of guide rolls 7c are attached to the front surface or the back surface of the base 13 along the guide rails 18 at appropriate intervals, and these guide rolls 7c and the pulleys 7b, 7b are attached. The traversing wire 7d is connected to the upper end portion of the cutting hammer 14, and when one piston rod of the traversing jack 7a is extended, the other piston rod is contracted to bring the cutting hammer 14 into the guide rail. It is configured to reciprocate along the tunnel width direction along 18.
[0026]
Further, as shown in FIG. 1, a compressed air blowing tube 19 is mounted on the front surface of the cutting hammer 14 and its lower end nozzle 19a is bent backward toward the lower end of the cutting hammer 14 so that the nozzle 19a The concrete cut material of the tunnel bottom t cut by the cutting hammer 14 is pushed backward by the jet air to be jetted. The cutting hammer 14 has a striking force applied to the bottom t of the tunnel made of concrete lining by causing a rod 14a having a cutting bit 14b projecting from the lower end to be impacted downward by pressure as in a known hammer drill. It is comprised so that it may cut by.
[0027]
The exclusion means 2 subsequent to the cutting machine 1 configured as described above is provided with a rotating brush 2b for scraping a concrete cut object from the near side to the rear in a casing 2a opened downward, and the casing 2a. The upper end of the concrete cut material retaining box 3a is connected to and communicated with the rear end of the leading end of the outlet pipe 2c, and the outlet end of the outlet pipe 2c is attached to the lower part of the front end of the collecting carriage 3. To face. Further, a rotation driving motor 2d for the rotating brush 2b is provided on the upper surface of the casing 2a.
[0028]
The concrete cut material retaining box 3a is attached to a support frame 3b fixed to the front end of the collecting cart 3 as a collecting means, and is in sliding contact with the bottom surface which is a cutting wall surface t ′ of the tunnel bottom surface t, and the collecting cart 3 The horizontal bracket portion 2c 'protruding from the rear end portion of the outlet pipe 2c is pivotally attached to the upper end portion of the staying box 3a. . Then, a jack 2e connects between the front end portion of the collecting carriage 3 and the front end portion of the horizontal bracket portion 2c 'so that the casing 2a of the removing means 2 is reciprocally swung in the horizontal direction by the expansion and contraction of the jack 2e. I have to.
[0029]
The collection trolley 3 has a hopper 30 mounted and installed on the trolley, a vibrating screen 31 installed on the hopper 30, and a concrete cut material from inside the concrete cut material retaining box 3a to above the vibrating screen 31. A front inclined conveyor 32 that conveys the slab, and a rear inclined conveyor that receives the cut concrete pieces that have been screened by the vibrating screen 31 and remain on the vibrating screen 31 from the vibrating screen 31 and puts them into the storage hopper 4a of the rear storage cart 4. And 33.
[0030]
The front and rear inclined conveyors 32 and 33 are formed by projecting protruding pieces 32a and 33a for placing a cut product (cutting piece) on the surface of the endless belt at small intervals in the length direction. In the same manner as the inclined conveyor 32, the collecting carriage 3 is inclined obliquely upward toward the rear, the upper end portion thereof is formed in the horizontal transfer portion 33b, and the transfer end portion is set in the storage cart 4. It faces the upper vicinity of the storage hopper 4a.
[0031]
The vibrating screen 31 has its screen surface inclined obliquely downward from the front end toward the rear end, and a vibrator 31a is installed on the rear end portion to vibrate the screen by the vibrator 31a. The concrete cut material put into the sieve 31 is screened into a granular concrete cut material that passes through the sieve screen and a concrete cut piece of a size suitable as an aggregate for ready-mixed concrete, and the powder that passes through the sieve screen. It is configured to drop and collect the granular concrete cut material on the lower hopper 30 while dropping the concrete cut pieces remaining on the sieve screen from the lower inclined end of the vibrating screen 31 onto the rear conveyor 33. .
[0032]
A drainage pipe 34 that receives moisture contained in the concrete cut material put on the vibrating screen 31 and stores it in a suitable position below is attached below the rear end of the sieve screen of the vibrating screen 31. The lower end opening of the hopper 30 is closed by a door 35 so as to be opened and closed.
[0033]
The storage cart 4 is provided with an inclined conveyor 4b having the same structure as the front and rear inclined conveyors 32 and 33 of the collecting cart 3 on the rear end side. The lower end horizontal portion of the inclined conveyor 4b is the lower end of the opening of the storage hopper 4a. And the upper end horizontal part faces the upper end opening of the mixer 50 mounted on the mixer carriage 5. The lower end opening of the storage hopper 4a is also closed by the door 4c so as to be opened and closed.
[0034]
The mixer 50 is composed of an upper mixer 51 and a lower mixer 52 communicating with each other through a passage (not shown) provided at the bottom of the upper mixer 51. These motors 5a are installed on a carriage. The agitating blades 5b that are rotatably disposed in the mixers 51 and 52 are rotated, and a fresh concrete C is produced in the upper mixer 51, and a valve (not shown) provided in the passage. ) Is opened, the ready-mixed concrete C produced by the upper mixer 51 is put into the lower mixer 52 through the passage, and the ready-mixed concrete C is stored in the lower mixer 52. Yes. Further, a ready-mixed concrete supply port 5b made of a pipe for discharging and placing ready-mixed concrete C in the lower mixer 52 to the bottom cutting wall surface t ′ of the tunnel T is provided at the lower end of the rear surface of the lower mixer 52. .
[0035]
As shown in FIG. 4, the leveling means 6 for leveling the ready-mixed concrete C placed on the cutting wall surface t ′ has a lower surface with a thickness of the concrete to be repaired from the cutting wall surface t ′ to the cutting wall surface t ′. There is a leveling plate 61 formed on the curved lower surface 6a parallel to the cutting wall surface t 'over the entire width of the tunnel T with the corresponding dimensions. The horizontal rails 62 and 62 fixed to the intermediate portion in the vertical direction are supported so as to be movable in the tunnel length direction.
[0036]
Specifically, rod-like support members 63, 63 are provided upright at both ends in the tunnel width direction of the leveling plate 61, and the horizontal rails are attached to the support plates 64, 64 fixed to the upper ends of these support members 63, 63. A plurality of rollers 65 and 65 that roll while pinching 62 and 62 are supported, and the roller 65 on one support plate 64 side is driven to rotate by a motor 66 installed on the support plate 64. Furthermore, vibrators 67 and 67 for applying vibration to the leveling plate 61 are provided on both sides of the upper surface of the leveling plate 61. The horizontal rails 62 and 62 are also configured such that rails of a certain length are sequentially replaced or added in the tunnel length direction.
[0037]
Next, a method for repairing the tunnel bottom surface by the repair device for the bottom surface t on the inner wall surface of the tunnel configured as described above will be described. The cart 3, the storage cart 4, the mixer cart 5, and the leveling means 6 are arranged in succession, and the bottom surface t of the tunnel T to be repaired is cut by a certain thickness by the cutting machine 1.
[0038]
To describe this cutting method in detail, the base 13 is moved downward by extending the rods 12a, 12a of the height adjusting jacks 12, 12 disposed on both sides of the horizontal base 10, and the base 13 The cutting bit 14b of the mounted cutting hammer 14 is brought into contact with the upper surface of the bottom surface t so that the base 13 cannot be moved further downward. Further, the cam plate 17c, which is rotatably provided at the central portion of the horizontal frame 10, is set so that its short diameter side is directed in the vertical direction. Then, when the cutting bit 14b of the cutting hammer 14 is in contact with and received by the upper surface of the bottom surface t, it is between the upper end surface on the short diameter side of the cam plate 17c and the arc-shaped lower surface 17d of the portal frame 17a. A gap (interval) equal to the cutting allowance of a certain depth to be cut by the cutting hammer 14 is formed.
[0039]
From this state, the rods 12a and 12a of the height adjusting jacks 12 and 12 are further extended to extend the horizontal pins 12b and 12b fixed to the rods 12a and 12a to the upper surfaces of both sides of the base 13 so that the protruding pieces 13a are fixed. , 13a is moved to the lower end side of the elongated holes 13b, 13b.
[0040]
In this state, the cutting hammer 14 is driven by compressed air to shockly move the rod 14a downward, and the bottom t is cut by striking the tunnel bottom t with the cutting bits 14b and 14b attached to the lower end. . As the cutting of the bottom surface t of the tunnel by the cutting hammer 14 progresses, the base 13 gradually moves downward, and when the bottom surface t is cut to a predetermined depth, the arc-shaped bottom surface 17d of the portal frame 17a becomes short of the cam plate 17c. The base 13 is prevented from further moving down by being brought into contact with and received by the upper end surface on the radial side, and cutting of a part of the bottom of the tunnel by the cutting bit 14b is completed.
[0041]
When the bottom surface t is cut to a certain depth by the cutting hammer 14 in this way, the base 13 is moved upward by rotating the cam plate 17c so that the major axis direction thereof is vertical, and the cutting bit of the cutting hammer 14 is moved. 14b is lifted to a position above the uncut tunnel bottom t. Next, the cutting hammer 14 is moved laterally to the next cutting position in the width direction of the tunnel along the arc-shaped guide rail 18 at the lower end of the base 13 by the operation of the traversing jack 7a of the moving mechanism 7. In the same manner as described above, the base 13 is moved downward and the bottom surface t is cut to a certain depth by the cutting hammer 14, and thereafter, by repeating this operation, the constant length portion of the bottom surface t of the tunnel T is constant over the entire width. Cut to depth.
[0042]
Next, the horizontal frame 10 is advanced to the next cutting position in the tunnel length direction, and the bottom surface t continuous with the cutting wall surface t ′ previously cut by the cutting hammer 14 is cut at that position in the same manner as described above. The cutting operation is repeatedly performed to cut the bottom surface t of the tunnel T over the entire length to form a cutting wall surface t ′ having a constant depth.
[0043]
The cut concrete cut material is sent backward by the air flow ejected from the lower end nozzle 19a of the spray pipe 19 attached to the front surface of the cutting hammer 14, and is rotated by the rotating brush 2b of the removing means 2 subsequent to the cutting machine 1. At the same time, it is scraped and fed into a retention box 3a provided in the collection carriage 3 through the outlet pipe 2c.
[0044]
Further, the concrete cut material is thrown from the staying box 3a onto the vibrating screen 31 disposed above the collecting cart 3 by the front inclined conveyor 32, and the vibrating screen 31 is not suitable for use as a raw concrete aggregate. A small powdered concrete cut is screened into the lower hopper 30. On the other hand, the large piece of concrete remaining on the vibrating screen 31 moves on the inclined surface of the vibrating screen 31 to the lower inclined end side due to the vibration of the vibrating screen 31, and from the lower inclined end onto the rear inclined conveyor 33. It is dropped and put into the storage hopper 4a on the storage cart 4 following the collection cart 3 by the rear conveyor 33, and once stored in the storage hopper 4a.
[0045]
In the case of preparing ready-mixed concrete with the mixer truck 5 subsequent to the storage truck 4, cement milk or mortar and the concrete cut pieces from the storage truck 4 are in a certain ratio in the upper mixer 51 of the mixer 50 of the mixer truck 5. Raw concrete is produced by charging and kneading. In addition, cement mill or mortar is supplied to the mixer 50 through a pipe 8 (shown in FIG. 2) arranged in the tunnel T when preparing ready-mixed concrete. When a certain amount of the concrete cut pieces in the storage hopper 4a is put into the mixer 51 by the inclined conveyor 4b of the staying carriage 4, a certain amount of the above-mentioned cement milk or mortar is supplied into the mixer 50 together with the concrete cut pieces. To do.
[0046]
In this way, the concrete cut material obtained by cutting the bottom surface t of the tunnel is passed through the vibration sieve 31 and a small powdered concrete cut material that is not suitable for use as an aggregate of raw concrete is screened into the lower hopper 30 and discarded. On the other hand, since the large concrete cut pieces remaining on the vibrating screen 31 are used as the inner concrete aggregate, the amount of the concrete cut material discarded as waste can be reduced. In addition, the thickness of the cast concrete on the cutting wall t ′ is set so that the entire amount of the concrete cut pieces obtained by the vibration sieve 31 can be used as the aggregate of the ready-mixed concrete placed on the cutting wall t ′. It is preferable, and if it sets in this way, not only the discard operation | work of a concrete cutting piece can be eliminated, but the necessity of using normal aggregates other than a concrete cutting piece can also be eliminated.
[0047]
Thus, a certain amount of the ready-mixed concrete C is temporarily stored in the lower mixer 52, and when it is placed on the cutting wall t ', the supply port 5b is opened and poured into the cutting wall t'. The leveling plate 61 of the leveling means 6 is vibrated by the vibrators 67 and 67, and the fresh concrete C placed on the cutting wall surface t ′ is leveled to be repaired to a new pavement surface.
[0048]
This repair work is performed by moving the collecting cart 3, the storage cart 4, the mixer cart 5, and the leveling means 6 following the cutting machine 1 as the bottom surface t of the tunnel T is cut in the tunnel length direction by the cutting machine 1. It is carried out continuously while moving. In the above embodiment, the cutting machine 1 is configured to cut only the bottom surface of the tunnel T, but is configured to cut the inner wall surface from both sides of the tunnel T to the top. Then, the inner wall surface of the tunnel T may be entirely renovated.
[0049]
【The invention's effect】
As described above, according to the tunnel inner wall surface modification method of the present invention, as described in claim 1, the tunnel inner wall surface cutting machine is cut while the tunnel inner wall surface cutting machine is moved in the tunnel length direction, The cut concrete cut material is supplied to a rear mixer and mixed with cement milk or mortar to prepare ready-mixed concrete, and this ready-mixed concrete is placed on a cutting wall surface by the tunnel inner wall cutting machine. Therefore, since the concrete cut material obtained by cutting the wall surface of the old tunnel is used as the aggregate of ready-mixed concrete, the amount of waste disposal of the concrete cut material outside the tunnel should be significantly reduced. In addition to being economical, it is possible to feed the concrete cut material to a mixer And reports open produced, since pouring the fresh concrete into the cutting wall, can be performed with good efficiency refurbishment work of the inner wall surface in parallel to the cutting operations of the tunnel wall.
[0050]
How to repair the tunnel wall In tunnel inner wall cutting machine The concrete cuts on the inner wall surface of the tunnel cut by the above are gathered together by the removing means and sent to the rear conveyor, and continuously fed to the vibrating screen from this conveyor, and the cut pieces of the concrete cut not passing through the vibrating screen are boned. Since the material is supplied to the mixer as a material, the concrete cuttings cut by the cutting machine are gathered together by the removing means without interrupting the cutting operation by the cutting machine, and continuously to the vibrating screen at the rear. This vibrating screen can be used to easily sort a concrete cut piece of a size suitable for a raw concrete aggregate, and the concrete cut piece is mixed with cement milk or mortar into a mixer. Ready-mixed concrete can be prepared by supplying in proportions.
[0051]
Claim 2 The invention according to claim 1 is an apparatus for carrying out the above-described method for repairing the inner wall surface of a tunnel, an inner wall surface cutting machine for cutting the inner wall surface of the tunnel while moving in the tunnel length direction in the tunnel, and the inner wall surface cutting machine A collecting means for collecting the concrete cut material cut by the above, a mixer for kneading the collected concrete cut material with cement milk or mortar to produce raw concrete, and this raw concrete was cut by the inner wall cutting machine Since the ready-mixed concrete placing means to be placed on the cutting wall is arranged sequentially in the rearward direction in the tunnel length direction, the inner wall surface of the tunnel is continuously moved while moving the cutting machine in the tunnel length direction. The concrete can be cut, and the concrete cut is collected by a collecting means to be used as a raw concrete aggregate. By supplying this, ready-mixed concrete can be easily produced without using any separate aggregate, and this ready-mixed concrete is cast on the cutting wall surface according to the cutting of the inner wall surface by a cutting machine, and the tunnel inner wall surface is made efficient. Can be repaired well.
[0052]
This tunnel inner wall repair device In tunnel wall cutting machine A concrete cutting object removing means for collecting the concrete cut material from the cutting wall surface and feeding it to the collecting means is arranged between the cutting means and the collecting means. It is possible to automatically feed the concrete cut material to the collecting means, and it is possible to reliably and smoothly remove the concrete cut material from the cutting wall surface.
[0053]
And claims 3 According to the invention, the collecting means includes a hopper mounted on the carriage, a vibrating screen disposed on the hopper, and a front side that receives the concrete cut material discharged from the removing means and drops it on the vibrating sieve. Concrete cutting discharged from the exclusion means, comprising an inclined conveyor and a rear inclined conveyor for receiving a cut piece of the concrete cutting portion screened by the vibrating sieve from the vibrating sieve and transporting it backward. It is possible to select the concrete cut pieces suitable as raw concrete aggregate by continuously putting the objects into the vibrating screen by the front inclined conveyor, and further passing this concrete cut piece to the rear mixer side through the rear inclined conveyor. It can be sent out smoothly.
[0054]
Claims 4 According to the invention according to the above, between the collecting means and the mixer, a storage carriage equipped with a hopper for temporarily storing the concrete cut pieces carried out from the rear inclined conveyor of the collecting means is interposed, Since a fixed amount of concrete cut pieces are put into the mixer from this storage cart, it is stored in the hopper of the storage cart regardless of the amount of cutting of the inner wall surface of the tunnel by the cutting machine and the cutting speed. The concrete cut pieces that are used as the raw concrete aggregate can be supplied to the mixer in an amount of cement milk or mortar at a constant ratio, and ready-mixed concrete suitable for repairing the inner wall surface can be produced.
[0055]
Furthermore, the claims 5 According to the invention, the mixer is mounted on a carriage, and includes a ready-mixed concrete supply port for supplying ready-mixed concrete prepared and kneaded by the mixer to a cut wall surface cut by a tunnel inner wall surface cutting machine. Therefore, a predetermined amount of ready-mixed concrete is placed on the cutting wall surface from the mixer according to the cutting speed of the tunnel inner wall surface by the cutting machine, so that the tunnel inner wall surface can be repaired efficiently.
[Brief description of the drawings]
FIG. 1 is a simplified side view of an entire tunnel wall surface repair device disposed in a tunnel,
FIG. 2 is a simplified plan view thereof.
FIG. 3 is a front view of the cutting machine,
FIG. 4 is a front view of leveling means.
[Explanation of symbols]
T tunnel
t inner wall
t 'Cutting wall
C Ready-mixed concrete
1 Cutting machine
2 Exclusion means
3 collection carts
4 storage cart
4a Storage hopper
5 Mixer truck
6 Leveling device
10 Horizontal mount
13 base
30 hopper
31 Vibrating sieve
32, 33 Front and rear conveyor

Claims (5)

The aged tunnel inner wall surface is cut by the tunnel inner wall surface cutting machine while the tunnel inner wall surface cutting machine is moved in the tunnel length direction, and the cut concrete cuts are gathered together by the exclusion means and sent to the rear conveyor. A raw concrete is produced by continuously supplying a vibrating piece from a conveyor to a vibrating screen and supplying a cut piece of a concrete cut material that does not pass through the vibrating screen to an aft mixer as an aggregate and kneading it with cement milk or mortar. A method for repairing a tunnel inner wall surface, characterized in that ready-mixed concrete is cast on a wall surface cut by the tunnel inner wall surface cutting machine. An inner wall cutting machine for cutting the inner wall surface of the tunnel while moving in the tunnel length direction in the tunnel, a collecting means for collecting the concrete cut material cut by the inner wall cutting machine, and cementing the collected concrete cut material A mixer that kneads milk or mortar to produce ready-mixed concrete, and a ready-mixed concrete placing means for placing the ready-mixed concrete on a cutting wall surface cut by the inner wall cutting machine, in the tunnel length direction toward the rear. Sequentially disposed tunnel inner wall surface refurbishment device, wherein the concrete cut object is removed from the cutting wall surface between the cutting machine and the collecting means of the tunnel inner wall surface and sent to the collecting means to remove the concrete cut object. A device for repairing the inner wall surface of a tunnel, characterized by being arranged . The collecting means is screened by a hopper mounted on a carriage, a vibrating screen disposed on the hopper, a front inclined conveyor for receiving a concrete cut material discharged from the removing means and dropping it on the vibrating screen, and a vibrating screen. The apparatus for repairing the inner wall surface of a tunnel according to claim 2 , further comprising: a rear inclined conveyor that receives a cut piece of the concrete cutting portion that is received from the vibrating screen and conveys the cut piece backward. Between the collecting means and the mixer, a storage cart equipped with a hopper for temporarily storing the concrete cut pieces transported from the rear inclined conveyor of the collecting means is interposed, and a certain amount of concrete is cut from the storage cart. The tunnel inner wall surface refurbishing apparatus according to claim 2 or 3 , wherein the piece is configured to be put into a mixer. The mixer is mounted on a carriage, and is provided with a ready-mixed concrete supply port for placing and supplying ready-mixed concrete kneaded and prepared on a cutting wall surface cut by a tunnel inner wall cutting machine. The tunnel inner wall surface refurbishing apparatus according to claim 2 or 4 .

Images