JP6599268B2 - Method for forming grooves on the inner surface of a tunnel - Google Patents

Description

  The present invention relates to a method for forming a groove extending in the circumferential direction of an inner surface of a tunnel.

  There is known a method of forming a groove on the inner surface of a tunnel using a machine having a rotary blade as a cutting blade at the tip of an arm of a backhoe (see, for example, Patent Document 1).

JP 2002-322897 A

In the method disclosed in Patent Document 1, the operator of the backhoe adjusts the movements of the backhoe boom, arm, and rotary blade expansion and contraction device as needed, and provides a groove extending in the circumferential direction of the inner surface of the tunnel. Because it is formed, it is difficult to adjust the movement of the backhoe boom, arm, and rotary blade telescopic device at any time, and the rotary blade easily swings in the direction along the tunnel extension direction. It is difficult to accurately form a groove extending in an arc along the inner surface of the tunnel on the cross section of the tunnel perpendicular to the center axis of the tunnel.
The present invention uses a groove forming device having a structure in which a cutting blade does not easily swing in a direction along the extension direction of the tunnel, so that the inner surface of the tunnel on the cross section of the tunnel perpendicular to the central axis of the tunnel along the extension direction of the tunnel. The present invention provides a method for forming a groove on the inner surface of a tunnel so that a groove extending along an arc can be easily and accurately formed.

According to the method of forming a groove on the inner surface of the tunnel according to the present invention, both ends of the cutting device and the tunnel cross-section perpendicular to the center axis of the tunnel along the tunnel extension direction are at different points on the inner surface of the tunnel. An X-axis guide device that moves the cutting blade of the cutting device along the X axis that intersects, and a cutting along the Y axis that is orthogonal to the X axis and intersects the inner surface of the tunnel X-axis while guiding the cutting blade with the X-axis guide body of the X-axis guide device and the Y-axis guide body of the Y-axis guide device. And by moving along the Y axis, an arc extending groove along the arc surface of the inner surface of the tunnel on the cross section of the tunnel perpendicular to the central axis of the tunnel along the extending direction of the tunnel is formed. The guide device makes it difficult for the cutting blade to swing in the direction along the tunnel extension direction and simplifies the operation, so that the arc on the inner surface of the tunnel on the tunnel cross-section perpendicular to the center axis of the tunnel along the tunnel extension direction. A groove extending in an arc shape along the surface can be formed easily and accurately.
Further, the X-axis and the X-axis are guided while the cutting blade is guided by the X-axis guide body and the Y-axis guide body in a state where both ends in the extending direction of the X-axis guide body are in contact with different points on the inner surface of the tunnel on the cross section of the tunnel. By moving along the Y axis, a groove extending in an arc shape along the arc surface of the inner surface of the tunnel on the cross section of the tunnel perpendicular to the central axis of the tunnel along the extension direction of the tunnel is formed. The guide body is stabilized, and a groove extending in an arc shape along the arc surface of the inner surface of the tunnel on the cross section of the tunnel orthogonal to the center axis of the tunnel along the extension direction of the tunnel can be formed more accurately.

The figure which shows the method of forming a groove | channel in the inner surface of a tunnel. The figure which shows the groove | channel formation apparatus used for the method of forming a groove | channel in the inner surface of a tunnel. The figure which shows a reinforcement structure in the cross section orthogonal to the central axis of a block material pile tunnel. The perspective view which shows a reinforcement structure seeing from the inner side of a block material stacking tunnel lining part. The disassembled perspective view which shows the reinforcement structure of a block material tunnel lining part. Sectional drawing which shows the fixation structure of a reinforcement board positioning member. Sectional drawing which shows the example of the fixing method of a reinforcement board. The front view which shows a reinforcement structure seeing from the inner side of a block material stacking tunnel lining part. Sectional drawing which shows the example of the fixing method of a reinforcement board.

As shown in FIG. 1, the method for forming a groove on the inner surface of the tunnel according to the embodiment includes a cutting device 110 and both ends on the tunnel cross section perpendicular to the center axis of the tunnel along the extending direction of the tunnel 99. An X-axis guide device 120 that moves a rotary blade 111 as a cutting blade of the cutting device 110 along an X-axis that is a linear axis that intersects at different points on the arc-shaped inner surface 3 of the tunnel 99, and orthogonal to the X-axis, In addition, a groove forming device 100 including a Y-axis guide device 130 that moves the rotary blade 111 along a Y axis that is a linear axis that intersects the inner surface 3 of the tunnel 99 is used. The rotary blade 111 is moved along the X axis and the Y axis while being guided by the X axis guide body 123 of 120 and the Y axis guide body of the Y axis guide device 130, so that the rotary blade 111 is moved to the X axis guide body 123. Therefore, in a state in which it is difficult to swing in the direction along the extension direction of the tunnel 99, an arc shape along the arc surface of the inner surface 3 of the tunnel 99 on the cross section of the tunnel perpendicular to the central axis of the tunnel 99 along the extension direction of the tunnel 99 is formed. Since the extending groove 4 (see FIG. 5) is formed, the groove 4 can be formed easily and accurately.
In FIG. 1, X represents the X axis and Y represents the Y axis.

The groove forming apparatus 100 will be described in detail based on FIG.
The groove forming device 100 includes a cutting device 110, an X-axis guide device 120 that guides linear movement of the rotary blade 111 of the cutting device 110 along the X-axis direction, and a Y-axis direction of the rotary blade 111 of the cutting device 110. The Y-axis guide device 130 for guiding the linear movement, the fixing unit 140, and the support device 150 are provided.

The cutting device 110 includes a rotary blade 111, a rotation drive source (not shown) that applies a rotational drive force for rotating the rotary blade 111 about the rotation center axis 112 of the rotary blade 111 to the rotation center axis 112, It is the structure provided with the control apparatus outside a figure which controls a rotational drive source.
The rotary blade 111 is, for example, a circular saw provided with a saw blade on the outer peripheral surface of a disk and rotated around the center of the disk. As the rotary blade 111, for example, a material capable of cutting concrete, brick, stone or the like is used.
The rotational drive source is, for example, a motor.

The X-axis guide device 120 includes an attachment body 121 attached to the cover 113 of the rotary blade 111, an X-axis guide mechanism that guides the attachment body 121 movably along the X-axis direction, and the X-axis guide mechanism. This is a configuration comprising a drive source (not shown) for applying a drive force to the drive unit and a control device (not shown) for controlling the drive source.
The X-axis guide mechanism includes an X-axis guide body 123 and a moving force transmission mechanism 124 that moves the attachment body 121 on the X-axis guide body 123.
The X-axis guide body 123 is formed by a long member that is attached to a head base 151 described later and extends in a direction along the X-axis.
The moving force transmission mechanism 124 is, for example, a rack 125 provided on the X-axis guide body 123 so as to extend in the direction along the X-axis, and a direction meshing with the rack 125 on the rack 125 along the X-axis. It is the structure provided with the pinion 126 provided in the attachment body 121 so that reciprocation is possible.
Note that the attachment body 121 includes an X-axis by a guide rail (not shown) provided on the X-axis guide body 123 and a slider (not shown) provided on the attachment body 121 so as to be movable by being supported by the guide rail. The guide body 123 is supported by the X-axis guide body 123 so as to reciprocate in the direction along the X-axis.
That is, a cover 113 of the rotary blade 111 is attached to the attachment body 121, and the rotary blade 111, the rotation center shaft 112, and a rotational drive source (not shown) are attached to the cover 113 in the direction along the Y axis by the Y axis guide device 130. Since it is attached so as to be movable, the rotary blade 111 is configured to be movable along the X axis by driving the drive unit of the X axis guide mechanism.
The drive source of the X-axis guide device 120 is, for example, a motor that applies a rotational force to the pinion 126 as the drive unit described above.

The Y-axis guide device 130 applies a driving force to the rotary blade 111, the rotation center shaft 112, the Y-axis guide mechanism that guides the rotational drive source on the Y-axis, and the drive unit of the Y-axis guide mechanism. It is the structure provided with the drive source outside a figure, and the control apparatus outside the figure which controls the said drive source.
The Y-axis guide mechanism includes a Y-axis guide body, a rotary blade 111 of the cutting device 110, a rotation center shaft 112, and a moving force transmission mechanism 131 that moves the rotational drive source on the Y-axis guide body.
The Y-axis guide body, for example, extends through the Y-axis groove 132 formed on the front surface 136 or the rear surface of the cover 113 of the rotary blade 111 so as to extend in the direction along the Y-axis, and the Y-axis groove 132. A rotation center shaft 112 of the disposed rotary blade 111 and a support member (not shown) that supports the bearing device 133 that rotatably supports the rotation center shaft 112 along the Y-axis direction of the Y-axis groove 132. This is a configuration provided.
For example, the moving force transmission mechanism 131 moves the bearing device 133 that rotatably supports the rotation center shaft 112 of the rotary blade 111 in the direction along the Y axis of the Y axis groove 132, thereby rotating the rotation center shaft 112 and the rotation center shaft 112. The rotary blade 111 connected to the rotation center shaft 112 and a pulley device that moves the rotational drive source in the direction along the Y axis of the Y axis groove 132, a piston cylinder device, a conveyor device, or the like.
The drive source of the Y-axis guide device 130 is, for example, a motor that drives the rope winding device of the pulley device described above, a working fluid that supplies and discharges working fluid such as oil and air to the cylinder of the piston cylinder device described above. It is a motor etc. which gives rotational force to drive parts, such as a drive pulley of a supply / discharge device and a conveyor device.

The cover 113 of the rotary blade 111 is disposed, for example, behind the X-axis guide body 123 (rear of the paper surface in FIG. 2).
The cover 113 of the rotary blade 111 is, for example, a front surface 136 and a rear surface facing the front surface 136 formed in a square shape or a quadrangular shape close to a regular rectangle, and the front surface 136 and the rear surface facing each other on the left side, the lower side, and the right side. Are each formed by a rectangular housing of the upper opening 115 configured to be connected by side plates.
The cover 113 of the rotary blade 111 is, for example, before and after the width dimension in the direction orthogonal to the paper surface of FIG. 2 (the dimension between the front surface 131 and the rear surface) is shorter than the length dimension of each side of the front surface 136. The upper part of the hollow body of the thin rectangular cubic body is opened, and the rotary blade 111 is moved to the inner side and the outer side of the cover 113 via the upper opening 115 by driving the drive unit of the Y-axis guide mechanism. It is configured to be movable.

  The fixing unit 140 includes, for example, a fixed base plate 141 and a support column 142 provided to rise from the fixed base plate 141.

The support device 150 is attached to the fixed portion 140 and supports the X-axis guide body 123 of the X-axis guide device 120 so as to be movable in the direction along the Y-axis, and supports the X-axis guide body 123 so as to be swingable. Device.
The support device 150 includes a head base 151 to which the X-axis guide body 123 is attached, a head base movement device 155 that moves the head base 151 to which the X-axis guide body 123 is attached in the direction along the Y axis, and a head base. And a support device 156.
The head base support device 156 includes a head base side swing support device 157 and an attachment member side swing support device 158.
The head base 151 is formed of, for example, a member extending in the direction along the X axis provided on the center side between both ends of the X axis extending direction of the X axis guide body 123. The X axis guide body 123 is, for example, The head base 151 is attached to the rear surface (the surface located behind the paper surface of FIG. 2).

The head base moving device 155 includes, for example, a rodless cylinder 161, a support rod 163 attached to a reciprocating body 162 provided so as to protrude from the side surface of the rodless cylinder 161, and capable of reciprocating, A support rod 163 includes an attachment member 164 for attaching the cylinder 161 to the support column 142 of the fixed portion 140, a drive source (not shown) for driving the rodless cylinder 161, and a control device (not shown) for controlling the drive source. The upper end (one end) of the fixing member 140 is attached to the head base 151 via the upper hinge mechanism 170, and the lower end (one end) of the attachment member 164 is attached to the column 142 of the fixing portion 140 via the lower hinge mechanism 171.
The head base 151 is configured to be swingable about the upper hinge mechanism 170 by the head base side swing support device 157, and the rodless cylinder 161 is mounted on the lower hinge mechanism 171 by the mounting member side swing support device 158. Is configured to be swingable about the rotation center.
The upper hinge mechanism 170 is provided at the center between both ends of the head base 151 in the X-axis extension direction, and the lower hinge mechanism 171 is provided at the upper end of the column 142 of the fixed portion 140.
The drive source of the rodless cylinder 161 is a working fluid supply / discharge device that supplies and discharges working fluid such as oil and air to the rodless cylinder 161.
By driving the rodless cylinder 161 and reciprocating the support rod 163 attached to the reciprocating body 162 in the direction along the Y axis, the head base 151, the X axis guide body 123, and the rotary blade 111 are moved to the Y axis. It can be reciprocated in the direction along.

For example, one end of the cylinder is attached to the support rod via a hinge, and one end of the piston rod is attached to one end of the head base 151 in the X-axis extension direction via a hinge. Side absorber 165 and one end of the cylinder attached to the support rod via a hinge, and one end of the piston rod attached to the other end side of the head base 151 in the X-axis extension direction via a hinge. A pair of the absorbers is configured in such a manner that two sets are provided at intervals in a direction orthogonal to the paper surface of FIG. 2, that is, four absorbers (dampers).
Since the head base side swing support device 157 is provided, when the head base moving device 155 is driven to move the head base 151 and the X axis guide body 123 so as to approach the inner surface 3 of the tunnel 99, the X axis The upper hinge mechanism 170 is supported by the buffer function of the head base side swing support device 157 by the reaction force when one end in the extending direction of the guide body 123 contacts the inner surface 3 before the other end. And the other end in the extending direction of the X-axis guide body 123 contacts the inner surface 3, so that the impact on the inner surface 3 when the X-axis guide body 123 contacts the inner surface can be reduced. The damage of the inner surface 3 can be prevented.
The damping force of the absorber of the head base side swing support device 157 is the X-axis guide in a state where no external force is applied to the X-axis guide body 123 and a state where only a small external force is applied to the X-axis guide body 123. The X-axis guide body 123 is not moved when the X-axis guide body 123 is subjected to a reaction force when one end in the extending direction of the X-axis guide body 123 contacts the inner surface 3 before the other end. It is set high so that it can be swung gradually.

The attachment member-side swing support device 158 includes, for example, a piston cylinder device group as a drive mechanism, a drive source for the piston cylinder device group, and a control device (not shown) that controls the drive source. .
The piston cylinder device group includes, for example, a cylinder 167a attached to one end side in the X-axis extending direction of the fixed base plate 141 of the fixed portion 140 via a hinge, and a rod 167b attached to the mounting member 164 via the hinge. The piston cylinder device 167 and the cylinder 168a are attached to the other end side in the X-axis extending direction of the fixed base plate 141 of the fixing portion 140 via a hinge, and the other end side where the rod 168b is attached to the attachment member 164 via the hinge. A pair of piston cylinder devices composed of the piston cylinder device 168 is configured by two sets, ie, four piston cylinder devices, spaced from each other in the direction orthogonal to the drawing sheet.
The drive source of the rodless cylinder 161 is a working fluid supply / discharge device that supplies and discharges working fluid such as oil and air to the piston cylinder device group.
By extending and contracting the piston of each piston cylinder device, as shown in FIG. 1, the mounting member 164 swings about the lower hinge mechanism 171 as the center of rotation, whereby the rodless cylinder 161 attached to the mounting member 164. The support rod 163, the head base 151, the X-axis guide body 123, and the rotary blade 111 can swing around the lower hinge mechanism 171 as a rotation center. In other words, the mounting member-side swing support device 158 is provided so that the mounting member 164 can swing with the lower hinge mechanism 171 as the rotation center, and the rotary blade 111 also has the lower hinge mechanism 171 as the rotation center. As configured to be able to swing.

Next, a procedure of a method for forming the groove 4 on the inner surface 3 of the tunnel 99 using the groove forming apparatus 100 will be described.
First, the fixed base plate 141 of the fixing portion 140 is fixed to, for example, a truck bed as the reaction force receiving portion 145. Then, for example, as shown in FIG. 1A, after the groove forming device 100 is carried into the tunnel 99 where the groove 4 is to be formed on the inner surface 3 and the track is fixed, the X-axis guide body 123 is imagined. As shown by the line, the support rod 163 is moved upward so that the X-axis guide body 123 approaches the inner surface 3, and both ends of the X-axis guide body 123 in the extending direction of the tunnel 99 along the extending direction of the tunnel 99 are moved. Two different points on the inner surface 3 are brought into contact with each other on the cross section of the tunnel perpendicular to the central axis.
In this state, while rotating the rotary blade 111, the Y-axis guide device 130 is driven to move the rotary blade 111 along the Y-axis so as to approach the inner surface 3, and the X-axis guide device 120 is driven. The arc surface of the inner surface 3 of the tunnel 99 on the cross section of the tunnel perpendicular to the central axis of the tunnel 99 along the extending direction of the tunnel 99 by moving the rotary blade 111 along the X axis and cutting the inner surface 3 Are formed on the inner surface 3 between both ends of the X-axis guide body 123 in the extending direction.
In addition, while driving the rotary blade 111, the Y-axis guide device 130 is driven to adjust the amount of movement in the direction along the Y-axis, and the rotary blade 111 with respect to the lining portion that forms the inner surface 3 of the tunnel 99. By adjusting the amount of biting of the blades, it is possible to form the grooves 4 having the same groove depth formed on the arc surface parallel to the arc surface along the circumferential direction of the inner surface 3.
After forming the groove 4 in the inner surface 3 between both ends in the extending direction of the X-axis guide body 123, the support rod 163 is moved so that the X-axis guide body 123 is separated from the inner surface 3. Thereafter, the mounting member side swing support device 158 is driven, and the support rod 163 is moved so that the X-axis guide body 123 approaches the upper left inner surface 3 as shown in FIG. Both ends in the extending direction of the X-axis guide body 123 are brought into contact with two different points on the inner surface 3 on the above-described tunnel cross section. Similarly to the above, the groove 4 extending in an arc shape along the arc surface of the inner surface 3 of the tunnel 99 on the cross section of the tunnel described above is formed on the inner surface 3 between both ends in the extending direction of the X-axis guide body 123. Go. Thereafter, the support rod 163 is moved so that the X-axis guide body 123 moves away from the inner surface 3, and then the attachment member-side swing support device 158 is driven, for example, as shown in FIG. The support rod 163 is moved so that the guide body 123 approaches the inner surface 3 on the upper right side, and both ends in the extending direction of the X-axis guide body 123 are brought into contact with two different points on the inner surface 3 on the tunnel cross section described above. Thereafter, in the same manner as described above, the groove 4 extending in an arc shape along the arc surface of the inner surface 3 of the tunnel 99 on the cross section of the tunnel is formed on the inner surface 3 between both ends in the extending direction of the X-axis guide body 123.
In this way, the X-axis guide body 123 is moved in the direction along the circumferential direction of the inner surface 3 to bring the X-axis guide body 123 into contact with different positions of the inner surface 3 of the tunnel 99 on the above-described tunnel cross section. By repeating the operation of forming the groove 4 extending in an arc shape along the arc surface of the inner surface 3 of the tunnel 99 on the tunnel transverse section described above on the inner surface 3 between both ends in the extending direction of the X-axis guide body 123, The groove 4 extending in an arc shape along the arc surface of the inner surface 3 of the tunnel 99 on the cross section of the tunnel described above can be easily and accurately formed on the upper half surface of the inner surface 3 of the tunnel 99.

That is, when a groove is formed using the groove forming device 100, the rotary blade 111 of the cutting device 110 is attached to the X-axis guide body 123 so as to be movable along the X-axis guide body 123. 111 can be accurately moved along the X-axis guide body 123, and the rotary blade 111 can be prevented from swinging in the direction along the extension direction of the tunnel 99. The groove 4 extending in an arc shape along the arc surface of the inner surface 3 of the tunnel 99 on the tunnel cross section described above can be accurately formed.
Further, in the cutting operation, it is only necessary to adjust the amount of movement of the rotary blade 111 in the direction along the Y axis by driving the Y axis guide device 130 without operating the X axis guide device 120. 4 can be formed by a simple operation.
In addition, since the cutting operation is performed after both ends of the extending direction of the X-axis guide body 123 are brought into contact with two different points on the inner surface 3 on the above-described tunnel cross section, the X-axis guide body 123 is stabilized, and the above-described The groove 4 extending in an arc along the arc surface of the inner surface 3 of the tunnel 99 on the cross section of the tunnel can be formed more accurately.

Example 1
Next, referring to FIGS. 3 to 8, the inner surface 3 of the block material stacking tunnel covering portion 1 as the inner surface 3 of the tunnel 99 is formed by the method of forming the groove 4 in the inner surface 3 of the tunnel 99 according to the present invention described above. A method and structure for forming the groove 4 to reinforce the block material stacking tunnel lining portion 1 will be described.
As shown in FIG. 3, the block material stacking tunnel lining portion 1 is a tunnel lining portion formed by stacking block materials 2A such as bricks 2, concrete blocks, stones, etc. on the inner surface of the tunnel (the ground excavation surface). is there.
The reinforcing method of the block material stacking tunnel lining portion 1 (hereinafter simply referred to as “lining portion 1”) includes a groove forming step, a reinforcing plate positioning member fixing step, and a reinforcing plate fixing step.
In the groove forming step, along the arc surface of the inner surface 3 on the cross section of the tunnel perpendicular to the central axis of the tunnel 99 (extension direction of the tunnel 99) on the upper side (upper half surface side) of the inner surface 3 of the lining portion 1 A plurality of grooves 4 extending in an arc shape are formed at predetermined intervals along the tunnel extending direction.
In the reinforcing plate positioning member fixing step, the reinforcing plate positioning member 5 extending along the circumferential direction of the inner surface 3 is fixed to the lining portion 1 in each groove 4 formed in the groove forming step.
In the reinforcing plate fixing step, the reinforcing plate 6 is installed so as to cover the inner surface 3 between the adjacent reinforcing plate positioning members 5; 5 fixed at a predetermined interval along the tunnel extending direction, and the lining portion The reinforcing plate 6 is fixed to the lining portion 1 so as to cover the entire upper side of the inner surface 3 of 1.

That is, the reinforcing structure of the lining portion 1 is formed along the circumferential direction of the inner surface 3 on the inner surface 3 of the upper portion of the lining portion 1 as shown in FIGS. A plurality of grooves 4 formed at intervals, a fixing means 10 (see FIG. 6), which will be described later, provided in each of the plurality of grooves 4, and a filler 7 for fixing filled in the grooves 4 (see FIG. 7). The reinforcing plate positioning member 5 fixed to the lining portion 1 by the above and the reinforcing plate positioning member 5 and the reinforcing plate positioning provided respectively in the grooves 4; 4 adjacent to each other at a predetermined interval along the tunnel extending direction. Both ends 69; 69 (both ends in the tunnel extension direction when installed so as to cover the inner surface 3) of the plate installed so as to cover the inner surface 3 with the member 5 are reinforcing plate positioning members 5 and a filler 7 filled in the groove 4 and solidified, and Reinforcing plate 6 (see FIG. 5; FIG. 7) positioned therebetween, connecting member 80 (described later) connecting end 69 of reinforcing plate 6 and reinforcing plate positioning member 5, or filler 8 for connection (FIG. 7). And other connecting means.
According to the reinforcing structure of the lining portion 1, the inner surface 3 between the reinforcing plate positioning members 5; 5 adjacent to each other fixed to the lining portion 1 at a predetermined interval along the tunnel extending direction is covered. Since the reinforcing plate 6 is fixed to the lining portion 1, the joint material filled in the joint between the bricks 2 and 2 adjacent to each other peels off and falls off, so-called joint thinning phenomenon occurs. The brick 2 can be prevented from falling.

  The groove 4 is formed by the method of forming the groove 4 on the inner surface 3 of the tunnel 99 according to the present invention. For example, the groove width (the length in the direction along the tunnel extension direction) is 200 mm, and the groove depth is the covering portion 1. The plurality of brick layers are formed to have a length corresponding to one brick layer, and the gap between the grooves 4 provided at predetermined intervals along the tunnel extending direction is formed to be 1000 mm. The groove 4 extends, for example, the brick 2 for one layer on the inner surface 3 side along the circumferential direction of the inner surface 3 by the groove width along the tunnel extending direction using the rotary blade 111 described above for cutting the brick 2. It is formed by removing in a semicircular arc shape. For example, the bottom surface 42 of the groove 4 is formed in a curved surface parallel to the curved surface along the circumferential direction of the inner surface 3 of the upper portion of the lining portion 1.

  As the reinforcing plate positioning member 5, for example, an H-shaped steel 50 is used. That is, for example, an H-section steel 50 formed so that the surfaces of the flanges 51 and 52 of the H-section steel are curved along the extending direction of the H-section steel using a bending machine. For example, the H-section steel 50 formed in the curved surface where the surface of the flanges 51;

As the reinforcing plate 6, for example, the plate surface of one cement plate formed as a main plate with cement as a main component and the plate surface of the other cement plate formed as a main plate with cement as a main component are bonded together with an adhesive. A curved cement plywood 60 having a configuration in which a pressure is applied to the surface of the cement plywood formed in this way to form a curved surface of the cement plywood is used.
Then, the curved surface side with the larger diameter of the curved cement plywood 60 is directed toward the inner surface 3 side of the lining part 1, and the curved surface side with the smaller diameter of the curved cement plywood 60 is directed to the tunnel cavity 11 (see FIG. 3). The curved cement plywood 60 is fixed to the lining portion 1 so as to cover the inner surface 3 so as to face the side.

The reinforcing plate positioning member fixing step includes a reinforcing plate positioning member both ends fixing step and a reinforcing plate positioning member whole fixing step.
In the reinforcing plate positioning member both ends fixing step, as shown in FIG. 6, fixing means 10 for fixing the reinforcing plate positioning member 5 to the lining portion 1 is provided at both ends in the circumferential direction of the inner surface 3 in each groove 4. Use.
The fixing means 10 is, for example, a member-side connection fixed by welding or the like to one end portion in the longitudinal direction of the H-section steel 50 as the reinforcing plate positioning member 5 positioned at the circumferential end portion of the inner surface 3 in the groove 4. And a groove-side connecting portion 13 that is fixed to the lining portion 1 and connected to the member-side connecting portion 12.

  The groove side connecting portion 13 has a first face plate portion 15 facing the terminal surface 41 of the groove 4 and a second face plate portion 16 facing the bottom surface 42 of the groove 4 at the circumferential end of the inner surface 3 in the groove 4. The angled connecting plate 17, the anchor 18 for fixing the second face plate portion 16 to the lining portion 1, and the screw hole 19 formed in the first face plate portion 15 are fastened to the first face plate portion 15. And a nut 22 that is fastened to the bolt 20 that is passed through the bolt through hole 21 formed in the member side connecting portion 12 and connects the member side connecting portion 12 and the first face plate portion 15.

In the reinforcing plate positioning member fixing step, first, angled connecting plates 17 are provided on both ends in the circumferential direction of the inner surface 3 of the groove 4, and the surface of the first face plate portion 15 of the angled connecting plate 17 is used as the end surface of the groove 4. The fixing anchor 18 is driven through the through-hole 23 formed in the second face plate portion 16 so that the surface of the second face plate portion 16 and the bottom face 42 of the groove 4 are in contact with each other. Then, the angle-shaped connecting plate 17 is fixed to both ends in the circumferential direction of the inner surface 3 in the groove 4. Then, the first face plate portion of the angle-shaped connecting plate 17 is inserted into the bolt through hole 21 of the member-side connecting portion 12 fixed to one end portion of the reinforcing plate positioning member 5 positioned on both ends in the circumferential direction of the inner surface 3 in the groove 4. By fastening the nut 22 to the bolt 20 through the bolt 20 projecting from 15, one end side of each reinforcing plate positioning member 5: 5 positioned on each end side in the circumferential direction of the inner surface 3 in each groove 4 is each groove 4 is fixed to each end of the inner surface 3 in the circumferential direction. And as shown in FIG. 3, the one or several reinforcement board positioning member 5 located in the center side of the circumferential direction of the inner surface 3 in the groove | channel 4 is set to each edge part side of the circumferential direction of the inner surface 3 in each groove | channel 4. A plurality of reinforcing plate positioning members 5 are installed along the circumferential direction of the inner surface 3 in each groove 4 by connecting to the other end side of each reinforcing plate positioning member 5; 5 to be positioned via a connecting member 25.
The connecting member 25 includes, for example, an additional plate 26 provided so as to straddle the flanges 51; 52 and the web 54 at the ends of the adjacent reinforcing plate positioning members 5; 5; 5 end flanges and fixing means 27 such as bolts and nuts for fixing to the web.
For each of the grooves 4, a semicircular arc-shaped H-shaped steel 50 having a length straddling both ends in the circumferential direction of the inner surface 3 of the groove 4 is installed and covered as the reinforcing plate positioning member 5. You may fix to the construction part 1. In this case, the connecting member 25 becomes unnecessary.

Then, as shown in FIG. 7A, for example, mortar 7 </ b> A as a fixing filler 7 is sprayed into the groove 4 in a state where the reinforcing plate positioning member 5 is fixed to the lining portion 1. And the same plane is formed with the surface 71 and the inner surface 3 of the sprayed mortar 7A, and solidification of the sprayed mortar 7A is awaited.
Further, a backing material such as mortar as a filling material 79 is injected between the groove bottom 42 of the groove 4 and the other flange 52 of the H-shaped steel 50, and the solidification of the filling material 79 is awaited. The filler 79 forms an injection path (not shown) from the mountain side of the lining portion 1 and is injected through the injection path.
As described above, the reinforcing plate positioning member 5 is fixed to the lining portion 1 with the fillers 7 and 79. In this way, the back surface 72 of one flange 51 positioned on the side of the tunnel cavity 11 of the H-shaped steel 50 as the reinforcing plate positioning member 5 fixed to the lining portion 1 where the groove 4 is formed is solidified. The distance between the surface 71 of the mortar 7A and the mortar 7A is formed to have the same size as the board thickness of the reinforcing plate 6 so that the end 69 of the reinforcing plate 6 can enter.

In the reinforcing plate fixing step, the inner surface 3 between the two reinforcing plate positioning members 5; 5 installed at predetermined intervals along the tunnel extending direction is installed so as to be covered with the plurality of reinforcing plates 6, The plurality of reinforcing plates 6 are fixed to the covering portion 1 so that the entire inner surface 3 between the reinforcing plate positioning members 5; 5 on the inner surface 3 on the upper side of the working portion 1 is covered with the plurality of reinforcing plates 6. In this case, as shown in FIG. 4; FIG. 8, on the inner surface 3 between the reinforcing plate positioning members 5; 5 provided so as to be adjacent to each other along the tunnel extending direction, The end faces 67 of the reinforcing plate 6 in the circumferential direction of the tunnel 67 are attached to each other so that the plurality of reinforcing plates 6 are arranged along the circumferential direction of the inner surface 3.
That is, both ends 69; 69 of the reinforcing plate 6 provided between the two reinforcing plate positioning members 5; 5 installed at a predetermined interval along the tunnel extending direction are connected to the reinforcing plate positioning member. 5 is inserted between the back surface 72 of one flange 51 and the front surface 71 of the solidified mortar 7A. At this time, one end 69 of the curved cement plywood 60 as the reinforcing plate 6 is inserted between the back surface 72 of the flange 51 of the one reinforcing plate positioning member 5 and the surface 71 of the solidified mortar 7A. In a state where the edge of one end portion 69 of 60 is abutted against the web 54 of one reinforcing plate positioning member 5 and the plate surface (curved surface) on the other end portion 69 side of the curved cement plywood 60 is pressed against the inner surface 3. The curved cement plywood 60 is moved to the other reinforcing plate positioning member 5 side and inserted between the back surface 72 of one flange 51 of the other reinforcing plate positioning member 5 and the surface 71 of the solidified mortar 7A. In this way, one end 69 side of the curved cement plywood 60 is positioned between the back surface 72 of one flange 51 of the one reinforcing plate positioning member 5 and the surface 71 of the solidified mortar 7A and the curved cement plywood. The other end 69 side of 60 is located between the back surface 72 of one flange 51 of the other reinforcing plate positioning member 5 and the surface 71 of the solidified mortar 7A. That is, both ends 69; 69 of the plate of the reinforcing plate 6 are a curved surface which is the back surface 72 of one flange 51 of the H-shaped steel 50 as the reinforcing plate positioning member 5 and a mortar 7A which is a solidified filler. Located between.

Next, the end portion 69 of the reinforcing plate 6 and the reinforcing plate positioning member 5 are connected using the connecting tool 80. For example, as shown in FIG. 7A, the connector 80 includes screw holes 81 that are through holes formed at four corners of the board surface of the reinforcing plate 6 and one flange 51 of the reinforcing plate positioning member 5. The second plate portion 83 includes a first plate portion 82 that contacts the surface of the first plate 82 and a second plate portion 83 that contacts the surface 63 of the reinforcing plate 6, and a screw hole 84 that penetrates the second plate portion 83. A formed reinforcing plate pressing plate 85 and a bolt 86 are provided. Then, the bolts are brought into contact with the surface of the first plate portion 82 and the surface 87 of the one flange 51 and with the surface of the second plate portion 83 and the board surface 63 as the surface of the reinforcing plate 6 in contact. 86 is inserted into the screw hole 84; 81, and the tip of the bolt 86 is brought into contact with the solidified surface 71 of the mortar 7 A so that one flange 51 is sandwiched between the first plate portion 82 and the reinforcing plate 6. Thus, the end 69 of the reinforcing plate 6 and the flange 51 are connected. In this case, since both ends 69; 69 of the reinforcing plate 6 in the tunnel extending direction are hidden behind the one flange 51; 51 of the reinforcing plate positioning member 5, both ends 69 of the reinforcing plate 6 in the tunnel extending direction are hidden. ; 69 becomes a single curved line that is the end edge of the flange 51.
As described above, as shown in FIG. 7A, the reinforcing structure of the lining portion 1 is completed.

According to the reinforcement structure of the lining part 1 according to the usage example 1, since the reinforcing material 6 is provided on the inner surface 3 of the lining part 1, it is possible to prevent the brick 2 from falling when a joint thinning phenomenon occurs.
Further, according to the first use example, the reinforcing plate 6 can be securely fixed to the lining portion 1 by the fixing means 10, the fixing filler 7, and the coupler 80, and both the reinforcing plate 6 in the tunnel extending direction can be fixed. Since the end portion 69; 69 appears as one curved line that is the end edge of the flange 51, the end surfaces of the reinforcing plates 6 adjacent to each other in the circumferential direction of the inner surface 3 can be easily aligned on one line. Therefore, it is possible to provide a reinforced structure excellent in aesthetics.

Example 2
As shown in FIG.7 (b), it is good also as a structure using the filler 8 as a connection means. In this case, one flange 51 located on the side of the tunnel cavity 11 of the H-shaped steel 50 is formed with an injection port 53 that is a through-hole penetrating the flange 51.
For example, as shown in FIG. 7A, in a state where the reinforcing plate 6 is connected to the flange 51 by the connecting tool 80, one of the reinforcing plate positioning members 5 is inserted from the injection port 53 as shown in FIG. When the mortar 8A as the filler 8 is injected between the back surface 72 of the flange 51 and the surface 71 of the sprayed mortar 7A and the mortar 8A is solidified, the end portion 69 of the reinforcing plate 6 becomes the reinforcing plate positioning member. 5 is firmly fixed to the back surface 72 of one flange 51 and the front surface 71 of the solidified mortar 7A in a fixed state, and the reinforcing plate 6 is firmly fixed to the lining portion 1 so as to cover the inner surface 3. . That is, both ends 69; 69 of the plate of the reinforcing plate 6 are a curved surface which is the back surface 72 of one flange 51 of the H-shaped steel 50 as the reinforcing plate positioning member 5 and a mortar 7A which is a solidified filler. Located between.
After the mortar 8A is solidified and the reinforcing plate 6 is fixed to the cover portion 1 so as to cover the inner surface 3, the bolt 86 is removed and the reinforcing plate pressing plate 85 is removed.
As described above, as shown in FIG. 7B, the reinforcing structure of the lining portion 1 is completed.

  According to the usage example 2, the reinforcing plate 6 can be more firmly fixed to the lining portion 1 by the filler 8 as the connecting means, and both ends 69; 69 of the reinforcing plate 6 in the tunnel extending direction are provided. Since it looks like one curved line that is the end edge of the flange 51, the end surfaces of the reinforcing plates 6 adjacent to each other in the circumferential direction of the inner surface 3 can be easily aligned on one line, and further the reinforcement Since the objects scattered and exposed on the surface of the plate 6 are eliminated, it is possible to provide a reinforcing structure that is more aesthetically pleasing.

Example 3
In the usage examples 1 and 2, the example in which the H-shaped steel 50 is used as the reinforcing plate positioning member 5 is shown. However, as the reinforcing plate positioning member 5, the other flange 52 of the H-shaped steel 50 in the usage examples 1 and 2 is used. The removed T-shaped steel 50A having a T-shaped cross section as shown in FIG. 11 may be used. That is, the T-shaped steel 50 </ b> A formed on the curved surface that matches the curved surface along the circumferential direction of the inner surface 3 of the upper portion of the lining portion 1 is used as the reinforcing plate positioning member 5.
In the case of the usage example 3, after inserting the web 54A of the T-shaped steel 50A as the reinforcing plate positioning member 5 into the groove 4, the T-shaped steel 50A is covered by filling the groove 7 with a filler 7 such as a mortar 7A. Fix to part 1. That is, both ends 69; 69 of the plate of the reinforcing plate 6 have a curved surface which is the back surface 72 of one flange 51 of the T-shaped steel 50A as the reinforcing plate positioning member 5 and a mortar 7A which is a solidified filler. Located between. And the reinforcement board 6 is fixed to the lining part 1 using the connector 80 like Embodiment 1 (refer Fig.9 (a)), or the reinforcement board 6 using the filler 8 like the usage example 2. FIG. Is fixed to the lining portion 1 (see FIG. 9B).
According to the usage example 3, the operation | work which inject | pours backing materials, such as mortar as the filler 79, from the mountain side of the lining part 1 through the injection path outside a figure can be eliminated. In addition, since the groove width of the groove 4 can be reduced, work effort and work efficiency for forming the groove 4 can be improved.

  In addition, what is necessary is just to use cement-type compositions, such as the mortar mentioned above or concrete, as the filler 7; 8; 79 mentioned above.

  Moreover, although the example using shape steel, such as H-section steel 50 and T-section steel 50A, was shown as the reinforcement board positioning member 5, things other than shape steel may be used.

  In the above description, the method of bringing both ends in the extending direction of the X-axis guide body 123 into contact with two different points on the inner surface 3 on the above-described tunnel cross section has been described. The cutting operation may be performed without contacting the surface. Even in this case, the rotary blade 111 can be accurately moved along the X-axis guide body 123, and the rotary blade 111 can be prevented from swinging in the direction along the extension direction of the tunnel 99. The groove 4 extending in an arc shape along the arc surface of the inner surface 3 of the tunnel 99 can be accurately formed.

3 Tunnel inner surface, 99 tunnel, 100 groove forming device, 110 cutting device,
111 rotary blade (cutting blade), 120 X-axis guide device, 123 X-axis guide body,
130 Y-axis guide device.

Claims (2)

The cutting blade of the cutting device is moved along the X axis, which is a linear axis where both ends intersect at different points on the inner surface of the tunnel on the cross section of the tunnel perpendicular to the center axis of the tunnel along the tunnel extension direction. A groove comprising: an X-axis guide device to be moved; and a Y-axis guide device to move a cutting blade of the cutting device along a Y-axis that is a linear axis perpendicular to the X-axis and intersecting the inner surface of the tunnel Using a forming device,
The center axis of the tunnel along the extension direction of the tunnel by moving the cutting blade along the X axis and the Y axis while being guided by the X axis guide body of the X axis guide device and the Y axis guide body of the Y axis guide device. A groove is formed on the inner surface of the tunnel, wherein a groove extending in an arc shape along the arc surface of the inner surface of the tunnel on a cross section of the tunnel perpendicular to the tunnel is formed.   The X-axis and Y-axis are guided while the cutting blade is guided by the X-axis guide body and the Y-axis guide body with both ends in the extending direction of the X-axis guide body being in contact with different points on the inner surface of the tunnel on the cross section of the tunnel. A groove extending in an arc shape along the arc surface of the inner surface of the tunnel on the cross section of the tunnel perpendicular to the central axis of the tunnel along the extending direction of the tunnel is formed. Item 2. A method for forming a groove on the inner surface of the tunnel according to Item 1.

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