JP7587435B2 - Concrete cutting equipment and existing lining concrete cutting method - Google Patents

Description

The present invention relates to a concrete cutting device that cuts concrete lining the inner surface of a tunnel currently in service, and to a method for cutting existing lining concrete.

In tunnels currently in use that have concrete linings on the inside, a long time has passed since the tunnels were constructed, and the concrete lining may have lost its strength or become distorted due to deterioration over time. In tunnels where the concrete lining has lost its strength or become distorted, the concrete lining must be cut.

For example, Patent Document 1 discloses that a high-pressure spray device that sprays treatment liquid at high pressure can be moved up and down and left and right along a guide rail installed on the construction surface. With this device, the construction surface can be cut while the high-pressure spray device is moved up, down, left and right.

However, with the device described in Patent Document 1, once cutting of the construction surface is completed, the guide rails installed on the construction surface must be moved to the next construction surface, making it difficult to use for cutting the lining concrete of tunnels in service where the construction area is large.

JP 2002-133316 A

The present invention aims to provide a concrete cutting device that can efficiently cut existing lining concrete using a high-pressure jet unit, and a method for cutting existing lining concrete.

The present invention relates to a concrete cutting device for cutting existing lining concrete lining the inner surface of a tunnel in service, the device comprising: a portal frame body having a portal-shaped cross section which is arranged inside the tunnel and has an internal passage space through which vehicles can pass and which is movable at least in the direction of the tunnel axis; a high-pressure spray unit which sprays a treatment liquid at high pressure toward the existing lining concrete; and a support frame which supports the high-pressure spray unit so that it can move relative to the inner surface of the existing lining concrete, the support frame being configured to be supported by the portal frame body, the support frame being provided with support frame moving means which is movable in the tunnel axis direction relative to the portal frame body, the support frame being provided with an axial guide rail on which the high-pressure spray unit can run in the tunnel axis direction, and a support frame which supports the high-pressure spray unit so that it can move relative to the existing lining concrete. and a cross-directional guide rail capable of running in a cross-sectional direction along the inner surface of the tunnel concrete, the cross-directional guide rail being formed in an arc shape with a length corresponding to approximately half the cross section of the inner surface of the tunnel, a protective section being provided inside the cross-directional guide rail for protecting cutting debris from being scattered by the spraying of the treatment liquid from the high-pressure spray section, and a transport device being provided below the protective section for collecting the cutting debris and transporting it in the tunnel axial direction, the support frame, the high-pressure spray section and the transport device being provided on both sides of the gate frame body in the tunnel width direction, and a soil accumulation device being provided for collecting the cutting debris transported by the transport device in the tunnel axial direction on one side of the tunnel width direction .

The present invention also relates to an existing lining concrete cutting method for cutting existing lining concrete lining the inner surface of a tunnel in service, the method comprising the steps of cutting the existing lining concrete by spraying a treatment liquid at high pressure onto the existing lining concrete from a high-pressure spray unit movably supported by a support frame provided on a portal frame body having a portal-shaped cross section that is arranged inside the tunnel, has an internal passage space through which vehicular traffic can pass, and is movable at least in the tunnel axial direction, and repeating the steps of cutting the existing lining concrete, movement of the high-pressure spray unit relative to the support frame, and movement of the portal frame body in the tunnel axial direction, the support frame being provided with support frame moving means that is movable in the tunnel axial direction relative to the portal frame body, the support frame being provided with an axial guide rail on which the high-pressure spray unit can run in the tunnel axial direction, and The present invention is characterized in that the high-pressure spray unit and the cross-directional guide rail along which the high-pressure spray unit can run in a cross-sectional direction along the inner surface of the existing lining concrete, the cross-directional guide rail being formed in an arc shape with a length corresponding to approximately half the cross-section of the inner surface of the tunnel, a protective unit being provided inside the cross-directional guide rail to protect against the scattering of cutting debris caused by the spraying of the treatment liquid from the high-pressure spray unit, and a transport device being provided below the protective unit to collect the cutting debris and transport it in the tunnel axial direction, the support frame, the high-pressure spray unit and the transport device being provided on both sides of the gate-type frame body in the tunnel width direction, and the cutting debris transported in the tunnel axial direction by the transport device is collected on one side of the tunnel width direction by a soil accumulation device .

The axial guide rail on which the above-mentioned high-pressure injection section can run in the tunnel axial direction may allow the high-pressure injection section to move in the tunnel axial direction directly relative to the axial guide rail, or the high-pressure injection section may move in the tunnel axial direction via a cross-sectional guide rail which can run in the cross-sectional direction.

In addition, the cross-sectional guide rail along which the high-pressure jet section can run in the cross-sectional direction along the inner surface of the existing lining concrete may allow the high-pressure jet section to move in the cross-sectional direction directly relative to the cross-sectional guide rail, or the high-pressure jet section may move in the cross-sectional direction via an axial guide rail capable of running in the tunnel axial direction.
The conveying device may be a belt conveyor or a pressure feeding device.

This invention makes it possible to efficiently cut existing lining concrete.
In more detail, the high-pressure jet unit can be moved relative to the support frame supported by a portal frame body placed inside the tunnel, and when cutting of the movable range is completed, the existing lining concrete in the next movable range can be cut simply by moving the portal frame body at least in the axial direction of the tunnel without having to replace the support frame. Therefore, the existing lining concrete can be efficiently cut by the high-pressure jet unit.

In addition, because a passage space is provided inside the portal frame body through which vehicular traffic can pass, even when cutting the existing lining concrete of an in-service tunnel, construction can be carried out while vehicles and other vehicular traffic pass through the passage space. In other words, even if the tunnel is in service, the existing lining concrete can be cut and repaired without closing it to traffic.

In addition, since the support frame is provided with a support frame moving means that can move in the tunnel axial direction relative to the portal frame body, the existing lining concrete can be cut even more efficiently.

In more detail, the portal frame body is provided with a support frame moving means capable of moving the support frame in the tunnel axial direction, so that when cutting of the movable range is completed by the high-pressure injection unit supported by the support frame, the existing lining concrete in the next movable range can be efficiently cut by simply moving the support frame relative to the portal frame body without having to move the portal frame body and without replacing the support frame.

In addition, the support frame is equipped with an axial guide rail along which the high-pressure jet section can run in the tunnel axial direction, and a cross-sectional guide rail along which the high-pressure jet section can run in the cross-sectional direction along the inner surface of the existing lining concrete, so that the high-pressure jet section can be moved in both the tunnel axial direction and the cross-sectional direction, and the high-pressure jet section can be moved along the inner surface of the existing lining concrete, thereby efficiently cutting the existing lining concrete.

In addition, the cross-sectional direction guide rail is formed in an arc shape with a length corresponding to approximately half the cross-section of the inner surface of the tunnel, and the support frame and the high-pressure injection section are provided on both sides of the gate frame body in the tunnel width direction. Therefore, it is possible to efficiently cut existing lining concrete on the inner surface of a tunnel having , for example, a horseshoe-shaped cross-section or an approximately three-core circular cross-section.

In addition, a protective section is provided on the inside of the cross-sectional guide rail to prevent cutting debris from being scattered by the spraying of the treatment liquid from the high-pressure spray section, so that it is possible to prevent the cutting debris of the existing lining concrete cut by the spraying of the treatment liquid from being scattered inward.

In addition, a transport device is provided below the protective section to collect the cutting debris and transport it in the tunnel axial direction, allowing the cutting debris to be efficiently collected and transported outside the tunnel.

As a further aspect of the present invention, a radial movement means may be provided for moving the support frame in a cross-sectional radial direction relative to the inner surface of the tunnel.
According to this invention, the high-pressure injection section can be positioned at an appropriate position relative to the existing lining concrete.

In addition, by using the radial movement means to move the support frame in a direction away from the inner surface of the tunnel, a gap can be created between the inner surface of the tunnel and the support frame, making it easy to move the gate frame body in the tunnel axial direction.

As a further aspect of the present invention, wheels that roll on rails laid on the tunnel floor in the tunnel axial direction may be provided at the lower end of the portal frame body.
This invention allows the portal frame to be easily moved in the axial direction of the tunnel, and therefore allows the existing concrete lining to be efficiently cut by the high-pressure jet unit.

The present invention provides a concrete cutting device that can efficiently cut existing lining concrete using a high-pressure jet unit, and an existing lining concrete cutting method.

Flowchart of the existing lining cutting process. FIG. 2 is a schematic diagram of a concrete cutting unit. FIG. 4 is a cross-sectional view of a concrete cutting unit. Cross-sectional view of the cut section of the existing lining. Side view of the existing lining cut section. FIG.

An embodiment of a concrete cutting unit 10 for cutting the existing lining concrete 3 of an existing tunnel 1 will be described below with reference to the drawings.
Figure 1 shows a flow chart of the existing lining cutting process.

FIG. 2 shows a side view of the front portion of the concrete cutting unit 10 (leading section cart 100, cutting section cart 200).
3A and 3B show cross-sectional explanatory views of the concrete cutting unit 10. In detail, Fig. 3A shows a cross-sectional view of the partition wall 20, and Fig. 3B shows a cross-sectional view of the leading bogie 100.

4 shows a cross-sectional view of the cutting section carriage 200, FIG. 5 shows a side view of the cutting section carriage 200, and FIG. 6 shows a partial perspective view of the cutting section carriage 200 from the leading side F and the right side in the width direction WR.
The cross-sectional views shown in Figures 3 and 4 show a direction viewed from the near side toward the leading side in the construction direction in the tunnel axial direction L.

In addition, in the tunnel axial direction L, which is the extension direction of the existing tunnel 1, the near side in the construction direction is referred to as the near side B, and the direction of the unconstructed area relative to the construction area is referred to as the leading side F. In addition, the width direction of the tunnel cross section is referred to as the tunnel width direction W, and the right side of the tunnel width direction W facing the leading side F is referred to as the right side in the width direction WR, and the left side facing the leading side F is referred to as the left side in the width direction WL.

The existing tunnel 1, which is the target of concrete cutting, is a road tunnel in use through which vehicles 5 pass, and is composed of a roughly three-core circular cross section with a roadbed 2 at the bottom. A predetermined thickness of lining concrete 3 (hereinafter referred to as existing lining concrete 3) is wrapped around the inner surface of the circular part above the roadbed 2.

The existing tunnel 1 does not have to be a road tunnel; it may be a railway tunnel through which trains pass, a pedestrian tunnel through which people pass, or a tunnel in which infrastructure facilities such as a water supply system are located.
Furthermore, the cross-sectional shape of the existing tunnel 1 does not have to be the above-mentioned cross-sectional shape, and may be any other appropriate cross-sectional shape, such as a horseshoe shape or a rectangle.
Furthermore, the existing lining concrete 3 may be sprayed concrete, reinforced concrete, or unreinforced concrete.

As described above, the existing lining concrete 3 that lines the inner surface of the tunnel may have deteriorated or become deformed due to aging and other factors as a long time has passed since the tunnel was constructed. The tunnel repair method described in this specification uses a concrete cutting unit 10 to cut the inner surface of the existing lining concrete 3 that has deteriorated or become deformed as described above, pour concrete with the specified performance, and line the inner surface of the tunnel with new lining concrete 4 (see Figure 4) in place of the existing lining concrete 3.

The concrete cutting unit 10 used for this purpose is a leading section carriage 100 having a partition section 20 at the end of the leading side F, a cutting section carriage 200, and an appropriate carriage, which are arranged in this order along the tunnel axial direction L from the leading side F to the near side B.

With the concrete cutting units 10 arranged in this order, on the right side WR of the width direction inside the tunnel 1a, there is a right conveyor belt 40 that transports the cut debris cut from the existing lining concrete 3 by the cutting section cart 200 toward the leading side F, and on the left side WL of the width direction, there is a left conveyor belt 50 that transports the cut debris cut by the cutting section cart 200.

The right transport belt conveyor 40 is arranged in a series of multiple units in the tunnel axis direction L, extending from the cutting section cart 200 to the leading side F of the leading section cart 100. In contrast, the left transport belt conveyor 50 is arranged in a series of multiple units in the tunnel axis direction L, extending from the cutting section cart 200 beyond the partition section 20 to the leading side F. The tip of the left transport belt conveyor 50 is configured to discharge the discharged cutting debris toward the leading side F.

The leading section carriage 100 and the cutting section carriage 200 are equipped with a protection carriage 30.
The protective trolley 30 has a gate-like shape when viewed from the front, forming a passage space 30X inside through which passing vehicles 5 can pass, and at its lower end is provided with wheels 31 that roll on rails 2a (see Figure 4) temporarily installed on the roadbed 2.

The protective cart 30, which is formed in a gate-like shape when viewed from the front, has a predetermined framework structure in which gate-shaped frames are arranged at a predetermined interval and connected by multiple beam members, and the outer surface is covered with steel plates. Note that in Fig. 6, the steel plates are shown through and the internal framework structure is shown by dashed lines.
The protection carriages 30 in the leading section carriage 100 and the cutting section carriage 200 are connected to each other by a connecting portion 32.

As shown in FIG. 3B, the leading bogie 100 is equipped with a soil accumulation device 110 on the leading side F of the protection bogie 30 for collecting cutting debris on one side in the tunnel width direction W.
The soil accumulation device 110 is a device for collecting cutting debris transported by the right transport belt conveyor 40 located on the right side WR of the width direction onto the left transport belt conveyor 50 located on the left side WL of the width direction.

The soil accumulation device 110 is composed of a skip elevator 120 that transports the cutting debris from the right side WR toward the top, and a discharge chute 130 that discharges the debris from the top to the bottom of the left side WL in the width direction toward the left transport belt conveyor 50.

The skip elevator 120 is equipped with a bucket 121 that receives the cutting debris carried out from the end of the right transport belt conveyor 40, a rail 122 that extends from the lower right side of the protective cart 30 to the upper left side, and a drive unit 123 that drives the bucket 121 along the rail 122.

The discharge chute 130 has an inlet 131 that receives cutting debris from the bucket 121 that has been moved by the skip elevator 120 to the upper left side of the protective cart 30, and a discharge outlet 132 that discharges the cutting debris fed from the inlet 131 toward the left transport belt conveyor 50.

The soil accumulation device 110 configured in this manner receives cutting debris transported by the right transport belt conveyor 40 arranged on the right side WR of the width direction of the protective cart 30 in a bucket 121, and transports the bucket 121 along the rail 122 to the upper left side of the protective cart 30 by driving the drive unit 123.

When cutting debris is fed into the inlet 131 from the bucket 121 transported to the upper left side of the protective cart 30, the fed cutting debris falls inside the discharge chute 130 and is discharged from the outlet 132 toward the left conveyor belt 50. This allows the cutting debris transported by the right conveyor belt 40 on the right side WR in the width direction to be collected on the left conveyor belt 50 on the left side WL in the width direction.

In this way, on the leading side F of the leading section cart 100, on which the soil accumulation device 110 is provided on the leading side F of the protection cart 30, a partition section 20 is provided that separates the leading side F from the concrete cutting unit 10.
As shown in Figure 3 (a), the partition section 20 comprises a wall surface 21 that blocks the outside of the upper half of the protective cart 30 that constitutes the leading section cart 100 from the inner surface of the existing lining concrete 3 of the existing tunnel 1 in the tunnel axial direction L, a partition balloon 22 arranged between the inner surface of the existing lining concrete 3 along the outer periphery of the wall surface 21, and a passage surface 23 arranged below the wall surface 21, outside the protective cart 30 in the tunnel width direction W.

The partition balloon 22 is configured to be expandable and contractable depending on the amount of air introduced inside, and during construction, air is introduced to expand it, causing it to adhere to the inner surface of the existing lining concrete 3, blocking the tunnel interior 1a in the tunnel axial direction L. In contrast, when the concrete cutting unit 10 moves, the air inside is discharged to shrink it, creating a gap between the inner surface of the existing lining concrete 3 and the outer edge of the wall surface 21, allowing the concrete cutting unit 10 to move unhindered.

In this way, the partition wall 20 provided at the end of the leading side F of the leading bogie 100 blocks the tunnel interior 1a in the tunnel axial direction L, and the area B in front of the partition wall 20 in the tunnel interior 1a is the construction area.

The cutting section cart 200 is equipped with a protection cart 30 and a concrete cutting device 210.
The concrete cutting device 210 is arranged along the side and top of the protective cart 30 and comprises a running rail 220 capable of running in the tunnel axial direction L relative to the protective cart 30, a movable frame 230 supported by the running rail 220, a connecting jack 240 that connects the movable frame 230 to the running rail 220 so that it can be expanded and contracted in the tunnel width direction W, a water jet 250 provided on the movable frame 230, and a protective unit 260 arranged on the side of the protective cart 30 of the water jet 250 provided on the moving frame 230.

The traveling rails 220 are formed in a roughly V-shape when viewed from the tunnel axial direction L so as to fit along the sides and top of the guard cart 30, and are arranged at a predetermined interval in the tunnel axial direction L. As shown in the enlarged view of Figure 4, the guard cart 30 side of each traveling rail 220 is equipped with multiple drive wheels 221 that roll on the outer surface of the guard cart 30.

The moving frame 230 is equipped with an arc-shaped cross-sectional guide rail 231 that corresponds to the inner surface of the existing lining concrete 3, an axial guide rail 232 that extends in the tunnel axial direction L and to which the water jet 250 is attached, and a drive unit 233 that drives the axial guide rail 232 along the cross-sectional guide rail 231. Note that the drive unit 233 is not shown in FIG. 6.

The cross-sectional direction guide rail 231 is formed in an arc shape with a length corresponding to half the cross-section of the inner surface of the existing lining concrete 3 excluding the upper ceiling portion.
The axial guide rail 232 is configured to be movable along the cross-sectional guide rail 231 by a drive unit 233 .

The connecting jack 240 is a jack that connects the moving frame 230 to the traveling rail 220 so that the frame can expand and contract in the tunnel width direction W. Specifically, the connecting jack 240 connects the traveling rail 220 to the cross-sectional guide rail 231.

The water jet 250 is attached to the axial guide rail 232 so as to be movable in the longitudinal direction, and can spray a treatment liquid at high pressure toward the existing lining concrete 3, cutting the existing lining concrete 3 with the sprayed high-pressure treatment liquid. The treatment liquid may be water, or a liquid mixed with an admixture that can be adjusted to an appropriate viscosity.

The protective section 260 is a sheet-like protective member that is attached to the outside of the moving frame 230 (the side facing the protective trolley 30) to prevent the debris cut by the water jet 250 from scattering inward, and is equipped with a conveying device 261 below that collects the debris.

The transport device 261 is disposed above the right transport belt conveyor 40 and the left transport belt conveyor 50. The protective section 260 is fixed to the moving frame 230, so it moves together with the moving frame 230 when the connecting jack 240 expands and contracts.

The concrete cutting device 210 configured in this manner extends the connecting jack 240, positions the water jet 250 supported by the moving frame 230 at a predetermined position relative to the inner surface of the existing lining concrete 3 (the state of the concrete cutting device 210 shown on the left side in Figure 4), and sprays high-pressure treatment liquid from the water jet 250 to cut the existing lining concrete 3.

At this time, the water jet 250 is moved in the tunnel axial direction L along the axial guide rail 232, and the axial guide rail 232 is moved along the cross-sectional guide rail 231 by the drive unit 233, thereby cutting the existing lining concrete 3 that faces the movable range surrounded by the cross-sectional guide rail 231.
The inner surface of the existing lining concrete 3 is cut by the water jet 250 in the cutting unit cart 200, and the exposed surface is defined as the cut inner surface 1b.

At this time, the debris cut by the water jet 250 can be prevented from scattering toward the protective trolley 30 by the protective section 260, and can be collected by the conveying device 261 and transported away by the right conveyor belt 40 or the left conveyor belt 50.

Then, when cutting of the existing lining concrete 3 facing the movable range surrounded by the cross-sectional guide rail 231 is completed, the connecting jack 240 is shortened to move the moving frame 230 and the protective part 260 away from the inner surface of the existing lining concrete 3 (the state of the concrete cutting device 210 shown on the right side in Figure 4), and the driving wheels 221 run on the outer surface of the guard cart 30, and the running rail 220 moves in the tunnel axial direction L relative to the guard cart 30 toward the part where the existing lining concrete 3 has not been cut.

As the cutting section cart 200 moves, the moving frame 230 and the protection section 260 also move in the tunnel axial direction L. The above cycle is then repeated to cut the existing lining concrete 3 in the area where the protection cart 30 of the cutting section cart 200 is positioned.

In this embodiment, as shown in FIG. 5, the concrete cutting device 210 is arranged on both sides of the protective cart 30 in the tunnel width direction W, and two are arranged at a predetermined distance in the tunnel axial direction L as shown in FIG. 3, but one may be arranged in the tunnel axial direction L.

Other suitable carts include an equipment cart in which equipment for driving the devices mounted on the leading section cart 100 and the cutting section cart 200 is mounted on the protection cart 30, a sheet cart for attaching sheets to the cutting inner surface 1b, or a center cart, and these may be connected to form a tunnel repair device.

The existing lining concrete cutting work, which is a process of cutting the existing lining concrete 3 from the tunnel interior 1a side by the concrete cutting device 210 in the cutting section cart 200 shown in Figures 4 and 5, will be described below.
In the cross-sectional view shown in Figure 4, the left half shows the state in which the existing lining concrete 3 has already been cut in the cut cross section of the existing tunnel 1, and the right half shows the state in which the existing lining concrete 3 is about to be cut.

In detail, as shown in FIG. 1, the existing lining concrete cutting work cuts the existing lining concrete 3 while moving the water jet 250 along the axial guide rail 232 in the tunnel axial direction L, and at the same time, the axial guide rail 232 is moved along the cross-sectional guide rail 231 by the drive unit 233 to cut the existing lining concrete 3 facing the movable range surrounded by the cross-sectional guide rail 231 (step s1). Then, this is repeated until cutting of the existing lining concrete 3 facing the movable range surrounded by the cross-sectional guide rail 231 is completed (step s3).

When cutting of the existing lining concrete 3 facing the movable range surrounded by the cross-sectional guide rail 231 is completed (step s2: Yes), if cutting of the range to be cut by the cutting section cart 200 is not completed, that is, if movement of the movable frame 230 relative to the guard cart 30 is not completed (step s3: No), the drive wheels 221 of the running rail 220 supporting the movable frame 230 are rotated via the connecting jack 240 to move it along the outer surface of the guard cart 30 in the tunnel axial direction L (step s4).

This process is repeated until cutting of the area to be cut by the cutting section cart 200 is completed, that is, when movement of the moving frame 230 relative to the protective cart 30 is completed (step s3: Yes), the existing lining concrete cutting work is completed.

As described above, the cutting section cart 200 that cuts the existing lining concrete 3 lining the inner surface of the existing tunnel 1 is placed inside the tunnel 1a, has a passage space 30X inside where passing vehicles 5 can pass, and is equipped with a guard cart 30 with a gate-shaped cross section that can move at least in the tunnel axial direction L, a water jet 250 that sprays treatment liquid at high pressure toward the existing lining concrete 3, and a moving frame 230 that movably supports the water jet 250. The moving frame 230 is supported by the guard cart 30, so that the existing lining concrete 3 can be cut efficiently.

In more detail, the water jet 250 can be moved relative to the movable frame 230 supported by the protective cart 30 arranged in the tunnel interior 1a, and when cutting of the movable range is completed, the existing lining concrete 3 in the next movable range can be cut simply by moving the protective cart 30 in the tunnel axial direction L, without having to replace the movable frame 230. Therefore, the existing lining concrete 3 can be cut efficiently with the water jet 250.

In addition, a passage space 30X through which passing vehicles 5 can pass is provided inside the protective trolley 30, so even when cutting the existing lining concrete 3 of the existing tunnel 1, construction can be carried out while passing vehicles 5 such as cars through the passage space 30X. In other words, even in the case of an existing tunnel 1, the existing lining concrete 3 can be cut and repaired without closing the tunnel to traffic.

In addition, the tunnel repair method in which the existing lining concrete is cut using the concrete cutting device 210 can efficiently cut the existing lining concrete 3, which is prone to becoming a bottleneck, and can carry out efficient tunnel repair work.
In addition, since the movable frame 230 is equipped with drive wheels 221 of the traveling rails 220 that can move in the tunnel axial direction L relative to the protective cart 30, the existing lining concrete 3 can be cut even more efficiently.

In more detail, the protective trolley 30 is provided with driving wheels 221 of the running rails 220 that can move the movable frame 230 in the tunnel axial direction L. Therefore, when cutting of the movable range is completed by the water jet 250 supported by the movable frame 230, the existing lining concrete 3 in the next movable range can be efficiently cut by simply moving the movable frame 230 relative to the protective trolley 30 without having to move the protective trolley 30 and without replacing the movable frame 230.

The moving frame 230 is also equipped with an axial guide rail 232 along which the water jet 250 can run in the tunnel axial direction L, and a cross-sectional guide rail 231 along which the water jet 250 can run in the cross-sectional direction along the inner surface of the existing lining concrete 3. This allows the water jet 250 to move in both the tunnel axial direction L and the cross-sectional direction, and move along the inner surface of the existing lining concrete 3, thereby efficiently cutting the existing lining concrete 3.

The cross-sectional guide rail 231 is formed in an arc shape with a length corresponding to the half cross-section of the tunnel inner surface excluding the upper ceiling, and the moving frame 230 and the water jet 250 are provided on both sides of the protective cart 30 in the tunnel width direction W, so that the existing lining concrete 3 on the inner surface of the tunnel with a roughly three-core circular cross-section can be efficiently cut.

In addition, a protective section 260 is provided on the inside of the cross-sectional guide rail 231 to prevent the scattering of cutting debris caused by the spraying of the treatment liquid from the water jet 250, so that the cutting debris of the existing lining concrete 3 cut by the spraying of the treatment liquid can be prevented from scattering inward.

In addition, a right conveyor belt 40 and a left conveyor belt 50 are provided below the protective section 260 to collect the cutting debris and transport it in the tunnel axial direction L, allowing the debris to be efficiently collected and transported outside the tunnel.

In addition, a connecting jack 240 is provided to move the moving frame 230 in the cross-sectional radial direction relative to the inner surface of the tunnel, so that the water jet 250 can be positioned at an appropriate position relative to the existing lining concrete 3.

In addition, by using the connecting jack 240 to move the movable frame 230 in a direction away from the inner surface of the tunnel, a gap can be created between the inner surface of the tunnel and the movable frame 230, making it possible to easily move the protective trolley 30 in the tunnel axial direction L.

In addition, the lower end of the protective cart 30 is provided with wheels 31 that roll on rails 2a laid on the roadbed 2 in the tunnel axial direction L, so the protective cart 30 can be easily moved in the tunnel axial direction L. Therefore, the existing lining concrete 3 can be efficiently cut by the water jet 250.

As described above, in the configuration of the present invention and the correspondence with the above-mentioned embodiment, the tunnel in service of the present invention corresponds to the existing tunnel 1,
Similarly,
The existing lining concrete corresponds to the existing lining concrete 3,
The concrete cutting device corresponds to the concrete cutting device 210,
The inside of the tunnel corresponds to the inside of the tunnel 1a.
The passing body corresponds to a passing vehicle 5,
The passage space corresponds to the passage space 30X,
The tunnel axis direction corresponds to the tunnel axis direction L,
The gate frame is adapted to accommodate the protective trolley 30.
The high pressure jet unit is compatible with water jet 250.
The support frame corresponds to the moving frame 230,
The support frame moving means corresponds to the driving wheels 221 of the running rail 220,
The axial guide rail corresponds to the axial guide rail 232;
The cross-sectional guide rail corresponds to the cross-sectional guide rail 231,
The protection unit corresponds to protection unit 260,
The conveying device corresponds to the right conveyor belt 40 and the left conveyor belt 50,
The radial movement means corresponds to the connecting jack 240;
The rail corresponds to rail 2a.
The wheels correspond to the wheels 31, but are not limited to those in the above embodiment.

For example, in the above description, the axial guide rail 232 along which the water jet 250 can move in the tunnel axial direction L is configured to be movable along the cross-sectional guide rail 231 by the drive unit 233, but the cross-sectional guide rail 231 may be configured to be movable along the axial guide rail 232, and the water jet 250 may be configured to be movable along the cross-sectional guide rail 231.

In addition, in the above explanation, the top portion of the existing lining concrete 3 was not cut, but the cross-sectional guide rail 231 may be extended toward the top portion so that the top portion of the existing lining concrete 3 can be cut.

1...existing tunnel 1a...tunnel interior 2a...rail 3...existing lining concrete 5...passing vehicle 30...protective trolley 30x...passage space 31...wheel 40...right conveyor belt 50...left conveyor belt 210...concrete cutting device 220...running rail 221...driving wheel 230...moving frame 231...cross-sectional guide rail 232...axial guide rail 240...connecting jack 250...water jet 260...protective section L...tunnel axial direction W...tunnel width direction

Claims (4)

A concrete cutting device for cutting existing lining concrete that lines the inner surface of a tunnel in service,
A portal frame body having a portal-shaped cross section that is disposed inside the tunnel, has a passage space inside through which a passing object can pass, and is movable at least in the tunnel axial direction;
A high-pressure injection unit that injects a treatment liquid at high pressure toward the existing lining concrete;
A support frame is provided to movably support the high-pressure injection unit against the inner surface of the existing lining concrete,
The support frame is configured to be supported by the gate-shaped frame body,
The support frame includes:
A support frame moving means is provided for the portal frame body, the support frame moving means being movable in the tunnel axial direction,
The support frame includes:
an axial guide rail along which the high-pressure injection unit can run in the tunnel axial direction;
The high-pressure jet unit is provided with a cross-sectional guide rail that can run in the cross-sectional direction along the inner surface of the existing lining concrete,
The cross-sectional guide rail is formed in an arc shape having a length corresponding to approximately half the cross section of the inner surface of the tunnel,
A protection part is provided on the inner side of the cross-sectional guide rail to prevent chipping from being scattered by the spray of the treatment liquid from the high-pressure spray part,
A conveying device is provided below the protective part to collect the cutting debris and convey it in the tunnel axial direction,
The support frame, the high-pressure injection unit, and the conveying device are provided on both sides of the gate frame body in the tunnel width direction,
A soil accumulation device is provided for collecting the cutting debris transported by the transport device in the tunnel axial direction on one side of the tunnel width direction.
Concrete cutting equipment. 2. A concrete cutting device according to claim 1, further comprising a radial movement means for moving said support frame in a cross-sectional radial direction relative to the inner surface of said tunnel. 3. A concrete cutting device according to claim 1 or 2 , wherein a wheel for rolling on a rail laid on the tunnel floor in the axial direction of the tunnel is provided at a lower end of the portal frame body. An existing lining concrete cutting method for cutting the existing lining concrete that lines the inner surface of a tunnel in service,
cutting the existing lining concrete by spraying a treatment liquid at high pressure from a high-pressure spray unit that is movably supported by a support frame provided on a portal frame body that is disposed inside the tunnel, has an internal passage space through which vehicles can pass, and is movable at least in the tunnel axial direction, toward the existing lining concrete;
The movement of the high-pressure injection unit relative to the support frame and the movement of the portal frame body in the tunnel axis direction are repeated,
The support frame includes:
A support frame moving means is provided for the portal frame body, the support frame moving means being movable in the tunnel axial direction,
The support frame includes:
an axial guide rail along which the high-pressure injection unit can run in the tunnel axial direction;
The high-pressure jet unit is provided with a cross-sectional guide rail that can run in the cross-sectional direction along the inner surface of the existing lining concrete,
The cross-sectional guide rail is formed in an arc shape having a length corresponding to approximately half the cross section of the inner surface of the tunnel,
A protection part is provided on the inner side of the cross-sectional guide rail to prevent chipping from being scattered by the spray of the treatment liquid from the high-pressure spray part,
A conveying device is provided below the protective part to collect the cutting debris and convey it in the tunnel axial direction,
The support frame, the high-pressure injection unit, and the conveying device are provided on both sides of the gate frame body in the tunnel width direction,
The cutting debris transported by the transport device in the tunnel axial direction is collected on one side of the tunnel width direction by a soil accumulation device.
A method for cutting existing lining concrete.

Images