JP2018048443A - Repair method for slab-type track, and rotary cutting tool used with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repair method for a slab-type track and a rotary cutting tool used with the same that enable a filler layer to be cut efficiently in a short period of time.SOLUTION: A repair method for a slab-type track is for repairing a slab-type track by cutting a filler layer 4 laid on a concrete base course 3. The filler layer 4 has a plurality of track slabs 5 mounted leaving an interval from each other, the track slab having a rail 6 on which a track vehicle travels fastened thereon. The filler layer 4 is removed so that the track slab 5 and the base course 3 may be separated, by moving a rotary cutting tool 15 along an outer peripheral part of the track slab 5 in a direction orthogonal to a rotary axis line L1 of the rotary cutting tool.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for repairing a slab track that can be suitably carried out in order to remove a filling layer of a slab track in repairing a slab track on which a high-speed track vehicle such as a Shinkansen travels, and rotary cutting used therefor Related to tools.

  A slab type track for a high-speed track vehicle such as a Shinkansen is composed of a concrete roadbed, a filling layer having a thickness of about 5 to 10 cm laid on the roadbed, and a concrete track slab installed on the filling layer. Have. The filling layer is made of a cured product of cement asphalt mortar (abbreviated as CAM) in which cement, asphalt, and fine aggregate are mixed.

  The outer periphery exposed to the outside of the filling layer is deteriorated in a short period of time due to frost damage caused by repeated freezing and thawing of the infiltrated water. In order to satisfy the above material characteristics and structural characteristics, repair is performed by reinjecting resin, resin mortar or CAM. Such repair is called frame repair. Since the refilled portion due to frame repair also deteriorates due to frost damage, etc., re-repair and re-repair are performed periodically by removing the deteriorated resin, resin mortar or CAM and re-injecting the resin, resin mortar or CAM for repair. Repeatedly.

  In the above repair, re-repair, and re-repair work, various devices equipped on a carriage that can travel on rails are used as conventional techniques for removing deteriorated resin, resin mortar, or CAM.

  As a cutting device, for example, a cutter described in Patent Documents 1 to 3 and a core drill described in Patent Document 4 are known.

Japanese Patent Laying-Open No. 2015-3358 Japanese Utility Model Publication No. 1-65301 JP 2008-208878 A Japanese Patent Laying-Open No. 2015-3426

  In each of the prior arts described in Patent Documents 1 to 4 described above, the cutting waste generated by cutting the rotary cutting tool cannot be efficiently discharged from the filling layer as the work material, and the cutting of the rotary cutting tool is not possible. The softened or melted resin adheres to the cutting blade whose temperature has increased due to friction with the material. When the resin adheres to the rotary cutting tool, in order to remove the attached resin from the rotary cutting tool, it is necessary to frequently interrupt the cutting operation, and there is a problem that the working efficiency of the cutting operation is reduced.

  The repair work of the slab track needs to be carried out so that the train can be restored to a state where the train can be operated in a very short time between 1 am and 4 am, for example, when the train does not travel. Therefore, there is a demand for a technique that can efficiently cut the filling layer.

  The objective of this invention is providing the repair method of the slab type | formula track | orbit which can cut off a filling layer efficiently in a short time, and the rotary cutting tool used for it.

The present invention cuts a filling layer laid between a concrete roadbed and a plurality of track slabs that are fastened with rails on which a track vehicle travels and that are spaced apart from each other in the direction in which the rails extend. Then, a slab track repair method for repairing a slab track,
Moving the rotary cutting tool in a direction perpendicular to the rotation axis along the outer periphery of the track slab, and removing the filling layer so that the track slab and the roadbed can be separated vertically. This is a characteristic method of repairing a track slab.

  Further, in the present invention, in the step of removing the filling layer, the rotary cutting tool is inserted from above into the gap between two adjacent track slabs so that the rotation axis thereof is parallel to the surface of the track slab, The method includes a step of cutting the filling layer facing the gap vertically to start removal.

  Further, the present invention is characterized in that the step of removing the filling layer includes a step of changing the removal depth of the filling layer by displacing the rotary cutting tool in the axial direction.

  Further, the present invention is characterized in that the step of removing the filling layer includes a step of changing the removal width of the filling layer by replacing the rotary cutting tool with a rotary cutting tool having a different diameter.

  Further, the present invention is characterized in that the removal depth of the filling layer by the rotary cutting tool is 1 cm or more and 120 cm or less.

The present invention also provides the rotary cutting tool,
Shank part,
A holder portion in which a plurality of spiral chip grooves are formed coaxially with the shank portion, and
A plurality of cutting tips provided at a portion of the holder portion facing each tip groove from the upstream side in the rotation direction, and a plurality of cutting tips having cutting edges protruding from the outer peripheral surface of the holder portion. .

The present invention is a rotary cutting tool used in the method for repairing the track slab,
Shank part,
A holder portion in which a plurality of spiral chip grooves are formed coaxially with the shank portion, and
A plurality of cutting tips provided at a portion of the holder portion facing each tip groove from the upstream side in the rotation direction, and a plurality of cutting tips having cutting edges protruding from the outer peripheral surface of the holder portion. It is a rotary cutting tool.

  According to the present invention, the filling layer is laid between the concrete roadbed and the plurality of track slabs to which the rails on which the track vehicle travels are fastened. The filler layer is removed by moving the rotary cutting tool in the direction perpendicular to the rotation axis along the outer periphery of the track slab, so that the outer periphery of the filler layer can be continuously cut in the feed direction. As a result, the filling layer installed under the track slab can be cut out in a short time so that the track slab and the roadbed can be separated vertically, and the time required for the repair work can be significantly shortened.

  Further, according to the present invention, in the step of removing the filler layer, a rotary cutting tool is inserted from above into the gap between two adjacent track slabs so that the axis of rotation is parallel to the surface of the track slab, and the gap is formed. Since the facing filling layer is cut perpendicularly and removal is started, when cutting is started, the rotary cutting tool can be easily inserted into the filling layer, and the cutting time of the filling layer can be shortened.

  Further, according to the present invention, in the step of removing the filling layer, the rotary cutting tool is displaced in the axial direction to change the removal depth of the filling layer, so the side surface of the filling layer from the side wall protruding from the side of the roadbed. The removal depth of the filling layer, that is, the cutting distance in the axial direction by the rotary cutting tool from the side surface of the filling layer can be changed appropriately according to the distance to the distance, etc., and the compatibility with the use environment can be improved. it can.

  Further, according to the present invention, in the step of removing the filler layer, the rotary cutting tool is replaced with a rotary cutting tool having a different diameter, and the removal width of the filler layer is changed. Therefore, it is possible to cut in accordance with a change in the distance between the protrusions and the side surface of the filling layer, and the convenience in use can be improved.

  Further, according to the present invention, since the removal depth of the filling layer with the rotary cutting tool is 1 cm or more and 120 cm or less, the filling layer is filled regardless of the distance from the side wall protruding to the side of the roadbed to the side surface of the filling layer. The layer can be cut.

  Further, according to the present invention, in the rotary cutting tool, the holder portion is coaxially connected to the shank portion, and a plurality of spiral chip grooves are formed, and the holder portion faces each chip groove from the upstream side in the rotation direction. Since the portion is provided with a plurality of cutting tips having cutting edges protruding from the outer peripheral surface of the holder portion, when each cutting tip is worn, the worn cutting tip can be easily replaced with a new cutting tip. And maintenance can be facilitated.

  According to the present invention, a plurality of cutting tips having cutting edges protruding from the outer peripheral surface of the holder portion are provided in the holder portion that is coaxially connected to the shank portion and has a plurality of spiral tip grooves. Can be removed by moving the rotary cutting tool in the direction perpendicular to the rotation axis along the outer periphery of the track slab, and the filling layer can be continuously cut in the feed direction. As a result, the filling layer installed under the track slab can be cut out in a short time so that the track slab and the roadbed can be separated to the upper limit, and the time required for repair work can be significantly reduced.

It is sectional drawing which shows the repair apparatus 1 for enforcing the repair method of the slab type track | orbit of one Embodiment of this invention. It is the top view which looked at the repair apparatus 1 from the upper direction of FIG. It is the simplified side view which looked at the repair apparatus 1 from the right side of FIG. FIG. 2 is a simplified side view of the repair device 1 as viewed from the left in FIG. 1. 3 is an enlarged side view showing a rotary cutting tool 15. FIG. It is the top view which looked at the slab type track | orbit 2 from the upper side which shows the cutting range of the filling layer 4. FIG.

  FIG. 1 is a cross-sectional view showing a repair device 1 for carrying out a repair method for a slab type track according to an embodiment of the present invention, and shows a vertical cross section perpendicular to the laying direction of a rail 6. 2 is a plan view of the repair device 1 as viewed from above in FIG. 1, FIG. 3 is a simplified side view of the repair device 1 as viewed from the right side of FIG. 1, and FIG. It is the simplified side view seen from 1 left. In order to re-repair the slab type track 2 on which a high-speed track vehicle such as a Shinkansen travels, the repair method of the present embodiment is performed using the repair device 1.

  The slab type track 2 includes a concrete roadbed 3, a filling layer 4 laid on the roadbed 3, and a plurality of track slabs mounted on the filling layer 4 with a gap therebetween in the track laying direction Z. And 5. The track slab 5 is made of a precast concrete slab having a thickness of about 16 cm to 20 cm, for example. On the track slab 5, a rail 6 for running the track vehicle is laid in a fastened state. The filling layer 4 is made of a cured product of cement asphalt mortar (abbreviated as CAM) in which cement, asphalt, and fine aggregate are mixed. The outer peripheral portion 4a of the filling layer 4 is provided with a resin layer made of a resin or a resin mortar layer by repair.

  The repair device 1 includes a main body frame 7, a pair of driving wheels 8 provided on the main body frame 7 and rolling on the rail 6, a pair of driven wheels 9 provided on the main body frame 7 coaxially with the driving wheels 8, A pair of traveling handles 10 a and 10 b for driving each drive wheel 8, a slide frame 11 provided on the main body frame 7 so as to be displaceable in the width direction Z, and the vertical direction Y with respect to the main body frame 7. And an elevating frame 12 provided to be displaceable.

  The repair device 1 further includes a height adjustment handle 13 for displacing the elevating frame 12 on the slide frame 11 in the vertical direction, and a front and rear for displacing the slide frame 11 in the width direction X with respect to the main body frame 7. An adjustment handle 14, a rotary cutting tool 15 that is driven to rotate about a rotation axis L1 parallel to the width direction X, and a rotary drive unit 16 that is provided on the lifting frame 12 and that drives the rotary cutting tool 15 to rotate about the rotation axis. And a pair of auxiliary wheels 17 that are provided on the main body frame 7 and support the main body frame 7 on the track slab 5.

  The rotation drive unit 16 includes an electric motor and a speed reducer, and can rotate the rotary cutting tool 15 around its rotation axis L1 at, for example, 600 rpm. Such a rotation speed can be changed in the range of 200 to 1000 rpm.

  FIG. 5 is an enlarged side view showing the rotary cutting tool 15. The rotary cutting tool 15 is concentrically connected to the shank portion 29 and the shank portion 20, and a plurality of spiral tip grooves 21 are formed in a plurality of strips and are axially symmetric, and in each tip groove 21 of the holder portion 22. A plurality of cutting tips 24 (also referred to as “bits”) provided with a plurality of cutting edges 23 provided on the seating surface of the portion facing from the upstream side in the rotational direction A and protruding from the outer peripheral surface of the holder portion 22 are provided. The shank part 20 and the holder part 22 are made of, for example, tool steel or high-speed steel.

  Each cutting tip 24 is a throw-away tip, and is detachably attached to the holder portion 22 with a bolt. A through hole 25 penetrating on the rotation axis is formed in the shank portion 20 and the holder portion 22. Cooling fluid such as cold water, liquid nitrogen, dry ice powder, or cold air is supplied to the through-hole 25 at a high pressure from the rotation drive unit 16 to the opening of the end surface of the base end portion of the shank portion 20. The fluid is discharged from the opening at the end face of the holder portion 22.

  Since the rotary cutting tool 15 is provided with a plurality of cutting tips 24 having cutting edges protruding from the outer peripheral surface of the holder portion 22 in the portion of the holder portion 22 facing each tip groove 21 from the upstream side in the rotation direction, When the cutting tip 24 is worn, the worn cutting tip 24 can be easily replaced with a new cutting tip, and maintenance management can be facilitated. Further, the cutting waste generated by the cutting is smoothly discharged from each chip groove 21 without the cutting waste adhering to each cutting tip 24 and the holder portion 22, and is sucked and collected by the suction device.

  By releasing the cooling fluid from the tip of the holder portion 22 in this manner, the temperature rise due to frictional heat of the cutting waste is suppressed, and the cutting waste is softened or melted by the frictional heat and adhered to the cutting tip 24. It is possible to prevent cutting waste smoothly and to continuously perform cutting work.

  The outer diameter D of the holder part 22 is 25 mm to 70 mm, and the length B of the holder part 22 is, for example, 40 mm to 100 mm. The cutting edge of the cutting tip 24 attached to the holder portion 22 protrudes outward in the radial direction from the virtual cylindrical surface including the outer peripheral surface of the holder portion 22. Such a protrusion amount is adjusted so that smooth cutting is possible in accordance with the state of deterioration of the outer peripheral portion 4a of the filling layer 4, for example, the hardness and the feed speed in the laying direction Z.

  The repair procedure will be described. The outer peripheral portion 4a of the filling layer 4 is deteriorated in a short period due to freezing damage caused by repeated freezing and thawing of the soaked water, and required characteristics such as spring characteristics and compressive strength for elastically supporting the track slab. Re-repair is performed to meet material and structural properties. Such re-repair is also called frame repair, and the repair method of this embodiment is performed.

  After the outer peripheral portion 4a made of the resin of the filling layer 4 is cut by the repair device 1, the track slab 5 and the roadbed 3 are separated by, for example, pushing up the track slab 5 on the roadbed 3 with a hydraulic jack, Filling the surrounding space formed by cutting the filling layer 4 with resin or resin mortar while the track slab 5 is positioned up and down to an appropriate height position with a hydraulic jack on the roadbed 3 Layer 4 is repaired again.

  FIG. 6 is a plan view showing the cutting range of the filling layer 4 when the slab type track 2 is viewed from above. As described above, the filling layer 4 is laid on the concrete roadbed 3, and a plurality of track slabs 5 to which the rails 6 on which the track vehicle runs are fastened are mounted on the filling layer 4 with a gap δ therebetween. Is done. The filling layer 4 moves the repair device 1 by rotating the traveling handle 10a or 10b by the operator, and moves the rotary cutting tool 15 perpendicular to the rotation axis L1 along the outer periphery of the track slab 5. It can be removed by moving in the direction.

  As a result, the outer peripheral portion 4a of the filling layer 4 can be continuously cut, for example, in the feed direction indicated by arrows a to d, and the outer peripheral portion 4a of the filling layer 4 installed under the track slab 5 is tracked. The slab 5 and the roadbed 3 can be excised in a short time so as to be separable to the upper limit, and the time required for repair work can be remarkably shortened.

  When the cutting operation of the outer peripheral portion 4a of the filling layer 4 is started, the rotary cutting tool 15 is inserted into the gap δ between two adjacent track slabs 5 so that the rotation axis L1 thereof is parallel to the track slab surface 5a. Since the outer peripheral portion 4a of the filling layer 4 in the gap δ between the adjacent track slabs 5 is cut and removed perpendicularly to each side, the rotary cutting tool is added to the filling layer 4 when cutting is started. 15 can be easily inserted, and the cutting time of the filling layer 4 can be shortened.

  In the step of removing the filling layer 4, the removal depth h of the filling layer 4 can be changed by displacing the rotary cutting tool 15 in the direction of the rotation axis L <b> 1, and therefore from the side wall W protruding from the side of the roadbed 3. Depending on the distance L2 to the side surface of the filling layer 4, the removal depth h of the filling layer 4, that is, the cutting distance in the direction of the rotation axis L1 by the rotary cutting tool 15 from the side surface of the filling layer 4 can be appropriately changed. , Can improve the suitability for the usage environment.

  Further, in the step of removing the filling layer 4, the rotary cutting tool 15 is replaced with a rotary cutting tool having a different diameter D, and the removal width of the filling layer 4 is changed. Therefore, the degree of deterioration of the filling layer 4 or the roadbed 3 Can be cut according to the change in the distance between the protrusion 3a from the side of the filler and the side surface of the filling layer 4, and the convenience in use can be improved.

  Moreover, since the removal depth h of the filling layer 4 by the rotary cutting tool 15 is 1 cm or more and 120 cm or less, regardless of the size of the distance L2 from the side wall W protruding to the side of the roadbed 3 to the side surface of the filling layer 4. The filling layer 4 can be cut.

  In the above-described embodiment, the re-repair procedure has been described. However, even when re-repair is performed, the repair can be performed by cutting the outer peripheral portion 4a of the filling layer 4 and filling the resin in the same manner as described above. it can. The rotary cutting tool of the present invention can be used not only for cutting resin, but also for cutting resin mortar or CAM.

DESCRIPTION OF SYMBOLS 1 Repairing device 2 Slab type track 3 Subbase 4 Filling layer 5 Track slab 6 Rail 7 Body frame 8 Drive wheel 9 Drive wheel 10a, 10b Traveling handle 11 Slide frame 12 Lifting frame 13 Height adjusting handle 14 Front / rear adjusting handle 15 Rotating cutting tool 16 Rotating drive unit 20 Shank unit 21 Chip groove 22 Holder unit 23 Cutting blade 24 Cutting chip 25 Through hole A Rotating direction X Cutting direction Y Vertical direction Z Laying direction

Claims (7)

A slab is formed by cutting a filling layer laid between a concrete roadbed and a plurality of track slabs that are fastened with rails on which a track vehicle travels and are spaced apart from each other in the direction in which the rails extend. Repair method of slab type track to repair type track,
Moving the rotary cutting tool in a direction perpendicular to the rotation axis along the outer periphery of the track slab, and removing the filling layer so that the track slab and the roadbed can be separated vertically. The repair method of the characteristic track slab.   The step of removing the filling layer is performed by inserting the rotary cutting tool into the gap between two adjacent track slabs from above so that the rotation axis thereof is parallel to the surface of the track slab, and facing the gap. The method for repairing a track slab according to claim 1, further comprising a step of cutting the substrate vertically to start removal.   The track slab repair according to claim 1 or 2, wherein the step of removing the filling layer includes a step of changing the removal depth of the filling layer by displacing the rotary cutting tool in the axial direction. Method.   The step of removing the filling layer includes a step of changing the removal width of the filling layer by replacing the rotary cutting tool with a rotary cutting tool having a different diameter. Repair method for track slabs.   5. The track slab repair method according to claim 1, wherein a removal depth of the filling layer by the rotary cutting tool is 1 cm or more and 120 cm or less. The rotary cutting tool is
Shank part,
A holder portion in which a plurality of spiral chip grooves are formed coaxially with the shank portion, and
A plurality of cutting tips provided at a portion of the holder portion facing each tip groove from the upstream side in the rotation direction, and a plurality of cutting tips having cutting edges protruding from the outer peripheral surface of the holder portion. The repair method of the track | orbit slab as described in any one of Claims 1-5. It is a rotary cutting tool used for the repair method of the track slab according to any one of claims 1 to 6,
Shank part,
A holder portion in which a plurality of spiral chip grooves are formed coaxially with the shank portion, and
A plurality of cutting tips provided at a portion of the holder portion facing each tip groove from the upstream side in the rotation direction, and a plurality of cutting tips having cutting edges protruding from the outer peripheral surface of the holder portion. Rotary cutting tool.

Images