JP2009281111A - Fixing device for floor slab for railway track - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing device for a floor slab for railway track capable of fixing the concrete floor slab for railway track securely and firmly when constructing the railway track of composite structure system on an existing steel bridge girder. <P>SOLUTION: This fixing device for the floor slab for railway track is provided with a fixing fitting attached to a lower face part of the floor slab 2 for railway track and abutting on the steel bridge girder 1 to prevent the floor slab 2 for railway track from moving and a fixing bolt 6 and a tapered washer 7 for fixing the fixing fitting on the lower face part of the floor slab 2 for railway track. The fixing fitting 5 is provided with a washer mounting part 5c having a tapered face inclining in the direction of right angle to axis of the steel bridge girder 1. The washer mounting part 5c is provided with a thin and long bolt hole 5d in the direction of right angle to axis of the steel bridge girder 1. The fixing bolt 6 is inserted into the bolt hole 5d. The tapered washer 7 is provided between the washer mounting part 5c and a head part 6a of the fixing bolt 6. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a fixing device for a track floor slab, and is mainly applied to refurbish an existing bridge sleeper railway track laid on a steel railway bridge and make a composite structure using a PC (precast concrete) plate. Is done.

  In general, most of the railway tracks are laid by the bridge sleeper system. Specifically, bridge sleepers are laid at regular intervals on steel bridges spanned in parallel, rails are laid on them, and each bridge sleeper is steel bridge and rails are fastened to bridge sleepers. It is fixed with bolts. Many steel railway bridges are protected by painting.

  By the way, more than half of the existing steel railway bridges have passed 60 years, and most of them have been corroded by exposure to wind and rain for many years. Especially, the corrosion directly under the pillows of steel bridges where tracks are laid is severe. Therefore, in recent years, how to maintain and manage these existing steel railway bridges has become a major issue.

  As a method for repairing a corroded steel bridge, a method is used in which the track is moved, the top surface of the steel bridge is repainted, and the moved track is restored again, but this does not lead to a fundamental solution.

  Therefore, a method to make steel bridge girders by using a floor slab made of a PC version instead of a bridge sleeper has been studied, but a PC version is laid on a steel bridge that has been corroded by wind and rain for many years. Therefore, it is particularly required to remodel without changing the existing rail level and rail position.

JP 2001-115415 A

  The former steel bridge repair method may cause corrosion again directly under the bridge sleeper tree, and it needs to be repaired several times at regular intervals. There is also a problem that the noise problem at the time of passing through the train, which has been pointed out so far, cannot be improved.

  On the other hand, the latter modification by the composite structure method using the PC slab has a problem that a reliable method for fixing a PC slab laid as a track slab on a steel bridge has not yet been established.

  In general, there is a method of projecting a gibber or stud on a steel bridge and fixing the stud with concrete or mortar in a loose hole formed in the PC plate. However, a stud is projected on the steel bridge. There is a problem that construction is troublesome because it is necessary to do so, and the cost increases. In addition, it is necessary to repair a steel bridge that has been damaged by the wind and rain for many years, and extra time is required.

  The present invention has been made to solve the above-described problems. When a steel railway bridge is formed into a composite structure using a track floor slab, the track floor slab is maintained while maintaining the existing rail level and rail position. It is an object of the present invention to provide a fixing device for a track slab that can be easily and reliably joined to a steel bridge.

  The fixing device for a track slab according to claim 1 is a fixing device for a track slab for fixing a track slab on a steel bridge, and is attached to a lower surface portion of the track slab. A fixing bracket that abuts against the steel bridge and prevents the movement of the track slab, a fixing bolt that fixes the fixing bracket to a lower surface portion of the track slab, and a taper washer, The fixing bracket is provided with a washer installation portion having a tapered surface inclined in the direction perpendicular to the axis of the steel bridge, the washer installation portion is provided with an elongated bolt hole in the direction perpendicular to the axis of the steel bridge, and the bolt hole The fixing bolt is inserted through the fixing bolt.

  Moreover, the fixing device for a track slab according to claim 2 is a fixing device for a track slab for fixing the track slab on a steel bridge, and is provided on a lower surface portion of the track slab. A fixing bracket that is attached and abuts against the steel bridge and prevents the movement of the track slab, and is interposed between the fixing bracket and the track slab, and adjusts the vertical position of the fixing bracket. An adjustment washer, and a fixing bolt for fixing the fixing bracket and the adjustment washer to the lower surface portion of the track slab, and the fixing bracket is provided with an elongated bolt hole in a direction perpendicular to the axis of the steel bridge. The fixing bolt is inserted into the bolt hole.

  In the present invention according to claim 1 and claim 2, when an existing bridge sleeper railway track laid on a steel railway bridge is compositely structured using a track slab made of a PC version. In addition, while maintaining the position and level of the existing rail, the track slab can be easily and securely fixed on the steel bridge.

  According to the present invention, the track slab is attached to at least two locations inside or outside the steel bridge spanned in parallel by attaching the fixing brackets in contact with the edge of the steel bridge span, respectively. It can be fixed so that it does not move in the direction perpendicular to the axis of the steel bridge.

  In addition, a plurality of connecting beams that connect the steel bridges between adjacent steel bridges are bridged, and the fixing bracket is brought into contact with the edge of the connecting beam at at least two locations outside or inside the connecting beams. By attaching each, the track slab can be fixed so as not to move in the axial direction of the steel bridge.

  In addition, the bolt hole provided in the washer installation portion of the fixing bracket is formed elongated in the direction perpendicular to the axis of the steel bridge so that the lateral position of the fixing bracket can be adjusted according to the position of the steel bridge. .

  Furthermore, since the washer installation portion has a tapered surface inclined in the direction perpendicular to the axis of the steel bridge and is formed in a wedge shape, even if the bolt hole is formed in a long and narrow hole in the direction perpendicular to the axis of the steel bridge, The fixing bracket does not shift laterally due to the reaction force from the steel bridge, and is excellent in strength.

  According to the second aspect of the present invention, since the adjustment washer for adjusting the vertical position of the fixing bracket is interposed between the fixing bracket and the track floor slab, the vertical position adjustment of the fixing bracket is performed. Can also be done easily.

  The adjustment washer in this case has a tapered surface inclined in the direction perpendicular to the axis of the steel bridge and is formed in a wedge shape, so that the vertical position of the fixing bracket can be adjusted, and the bolt hole Even if the steel bridge is formed in a long and narrow elongated hole in the direction perpendicular to the axis, the fixing bracket does not shift laterally due to the reaction force from the steel bridge and is excellent in strength.

  Therefore, according to the present invention, the track slab can be fixed so as not to move in two directions, the axial direction of the steel bridge and the direction perpendicular to the axis, and the unevenness adjustment between the steel bridge and the track slab is possible. By installing the members, the track deck can be easily and firmly fixed to the steel bridge while maintaining the position and level of the existing rail. The unevenness adjusting member may be a mortar, concrete, or resin mortar filler, and a steel plate may be laminated in a plurality of layers instead of the filler.

  In addition, the fixing bracket can be attached to the lower surface of the track slab with fixing bolts, and it is not necessary to perform special processing on the steel bridge girders, so the track slab can be easily fixed on the steel bridge girders. it can.

  The fixing bracket may be attached to both sides of one steel bridge and the connecting beam. Also, instead of a connecting beam, a protrusion (cantilever) protruding in the direction perpendicular to the axis of the steel bridge is provided on the side of the steel bridge, and the fixing bracket is attached in a state where it is in contact with the edge of the protrusion. In this way, the track slab can be fixed so as not to move in the axial direction of the steel bridge.

  The track floor slab fixing device according to claim 3 is the track floor slab fixing device according to claim 1 or 2, further comprising a lift prevention metal fitting for preventing the track floor slab from rising. It is characterized by being.

  According to the present invention, it is possible to prevent the track slab from being lifted by an unexpected external force.

  The track slab fixing device according to claim 4 is the track slab fixing device according to any one of claims 1 to 3, wherein the unevenness adjusting material is provided between the steel bridge and the track slab. It is characterized by being installed.

  According to the present invention, the level of the track deck can be adjusted, so that the track deck can be fixed to the steel bridge while maintaining the height and the horizontal position of the existing rail. In addition, mortar, concrete, resin mortar, etc. can be used for the unevenness adjusting member. Moreover, it may replace with a filler and may laminate | stack steel plates in multiple layers.

  The present invention provides a fixing bracket that is attached to a lower surface portion of a track slab and prevents the movement of the track floor slab by contacting the steel bridge, and the fixing bracket is fixed to the lower surface portion of the track slab. A fixing bolt and a tapered washer are provided, and the fixing bracket is provided with a washer installation portion having a tapered surface inclined in a direction perpendicular to the axis of the steel bridge, and the steel bracket is provided in the direction perpendicular to the axis of the steel bridge A long and slender bolt hole is provided, and the fixing bolt is inserted into the bolt hole. Therefore, an existing bridge sleeper type railway track laid on a steel railway bridge is used as a track floor slab composed of a PC version. When the composite structure is formed by using the rail, the track slab can be easily and securely fixed on the steel bridge while maintaining the level and position of the existing rail.

  FIGS. 1 to 5 show a composite structure type railway track laid on a steel railway bridge. In the figure, a track slab 2 is placed on a plurality of steel bridges 1 and 1 laid in parallel. It is laid and rails 3 and 3 are laid on it. Further, the unevenness adjusting material 4 is filled between the steel bridges 1 and 1 and the track slab 2.

  An assembled H-section steel is used for the steel bridge 1 and a PC plate is used for the track slab 2. The track slab 2 is fixed to a plurality of track slabs on the steel bridges 1 and 1 on its lower surface. It is fixed by apparatus A (hereinafter referred to as “fixing apparatus A”).

  The fixing device A includes a fixing bracket 5 attached to the lower surface portion of the track floor slab 2, a fixing bolt 6 and a taper washer 7 for fixing the fixing bracket 5 to the lower surface portion of the track floor slab 2, Each fixing device A is attached to the inside of steel bridges 1 and 1, respectively. Further, the taper washer 7 is interposed between the bolt head 6 a of the fixing bolt 6 and the fixing bracket 5.

  The fixing bracket 5 is formed in a substantially inverted L shape in cross section from a fixing portion 5a fixed to the lower surface portion of the track slab 2 and a drooping portion 5b contacting the edge of the upper flange 1a of the steel bridge 1. Yes.

  The fixing portion 5a is formed with a washer installation portion 5c that is thickest on the hanging portion 5b side and gradually becomes thinner in the direction of the distal end of the fixing portion 5a. In this case, the washer installation portion 5c is gradually thinned in the tip direction by forming a taper that gradually increases in the tip direction of the fixed portion 5a on the lower surface of the washer installation portion 5c.

  The washer installation portion 5c is formed with an elongated bolt hole 5d in the direction perpendicular to the axis of the steel bridge 1. Further, the washer installation portion 5c is sandwiched between the fixing portion 5a and the hanging portion 5b, and triangular plate-like reinforcements are provided on both sides thereof. Ribs 5e and 5e are formed. The bolt hole 5d is formed with an inner diameter through which the fixing bolt 6 can be inserted.

  The fixing metal 5 formed in this way is attached to the lower surface portion of the track floor slab 2 by a fixing bolt 6 and a taper washer 7 that penetrate the bolt hole 5d. The fixing bracket 5 is fixed by strongly fastening the fixing bolt 6 to the insert 8 embedded in the track floor slab 2.

  At that time, the position of the fixing bracket 5 in the horizontal direction and the vertical direction can be adjusted by moving back and forth in the direction perpendicular to the axis of the steel bracket 1, that is, the long axis direction of the bolt hole 5 d.

  Further, the fixing bracket 5 is attached to the lower surface portion of the track slab 2 in this way and is in contact with the edge of the upper flange 1a of the steel bridge 1 so that the track slab 2 is a steel bridge 1 It is fixed so that it does not move laterally.

  FIG. 6 shows another embodiment of the present invention, in which a lifting prevention metal fitting 9 for preventing the track floor slab 2 from rising is provided at the lower end portion of the hanging part 5 b of the fixing metal 5.

  The anti-lifting metal fitting 9 is composed of a horizontal piece 9b protruding horizontally below the upper flange 1a of the steel bridge 1 and a vertical bolt 9b screwed upward to the horizontal piece 9b. And since the upper end part of the vertical bolt 9b is in contact with the lower side of the upper flange 1a of the steel bridge 1, the lifting of the track slab 2 is prevented.

  FIGS. 7A and 7B show another embodiment of the present invention, which is configured so that the horizontal position adjustment of the fixture 5 can be performed simultaneously with the vertical position adjustment.

  If it demonstrates concretely, the fixing | fixed part 5a of the fixing metal fitting 5 will be formed in the state inclined gradually in the downward gradient in the front-end | tip direction. An adjustment washer 10 is interposed between the fixed portion 5 a and the track floor slab 2. Further, the fixing portion 5a and the adjustment washer 10 are respectively formed with bolt holes 5d and 10a elongated in the direction perpendicular to the axis of the steel bridge 1.

  The fixing metal 5 and the adjustment washer 10 thus formed are attached to the lower surface portion of the track slab 2 by the fixing bolt 6 and the taper washer 7 penetrating the bolt holes 5d and 10a. The national metal fitting 5 is fixed to the lower surface of the track slab 2 by firmly fastening a fixing bolt 6 to the insert 8 embedded in the track slab 2.

  At that time, the horizontal position of the fixing bracket 5 can be adjusted by moving the fixing bracket 5 back and forth in the major axis direction of the bolt hole 5d, and at the same time, the adjustment washer 10 is adjusted in the major axis direction of the bolt hole 10a. By moving back and forth, the vertical position of the fixture 5 can be adjusted.

  In FIG. 7B, the taper washer 7 is omitted by forming the lower surface of the fixing portion 5a of the fixing metal 5 in FIG. 7A flat.

  FIGS. 8 to 9 also show other embodiments of the present invention. The track slab 2 is mounted on a steel bridge 1 and 1 by a track slab fixing device B (hereinafter “fixing device B”). It is fixed so that it does not move sideways or lift.

  More specifically, the fixing device B includes a metal fitting body 11 attached to the lower surface of the track slab 2, two connecting plates 12, 12 and two pieces for connecting the metal fitting body 11 to a steel bridge 1. It is composed of coupling nuts 13 and 13.

  The metal fitting body 11 is composed of a mounting plate 11a and a coupling bolt 11b suspended substantially at the center of the mounting plate 11a. The mounting plate portion 11a has bolt holes 11c and 11c on both sides of the coupling bolt 11b. Is formed. In particular, the bolt holes 11c and 11c are elongated in the direction perpendicular to the axis of the steel bridge 1.

  The bracket main body 11 formed in this way is attached to the bottom surface of the track slab 2 by fastening the mounting holts 14 and 14 to the inserts 8 embedded in the track slab 2 from the bolt holes 11c and 11c of the mounting plate 11a. It is attached to the part.

  At this time, by moving the metal fitting body 11 in the major axis direction of the bolt hole 11c, that is, the direction perpendicular to the axis of the steel bridge 1, the position of the metal fitting body 11 can be adjusted in the direction perpendicular to the axis of the steel bridge 1. It has become so.

  The coupling plates 12, 12 are attached to the coupling bolt 11b so as to sandwich the upper flange 1a from above and below the upper flange 1a of the steel bridge 1 upper flange 1a.

  The coupling nuts 13 and 13 are located on the back side of the coupling plates 12 and 12 and are screwed into the coupling bolt 11b. The metal fitting body 11 is coupled to the steel bridge 1 by tightening the coupling nuts 13 and 13 and firmly sandwiching the upper flange 1a of the steel bridge 1 by the coupling plates 12 and 12.

  At this time, the level of the track slab 2 can be adjusted by turning the coupling nuts 13 and 13 to appropriately move the positions of the coupling plates 12 and 12 in the vertical direction. Therefore, according to the fixing device B, the track slab can be adjusted in two directions, ie, the direction perpendicular to the axis of the steel bridge and the vertical direction, so that the track position can be adjusted while maintaining the horizontal position and level of the existing rail. The floor slab 2 can be fixed to the steel bridge.

  In the present invention, a railway track of a composite structure system can be laid by installing a floor slab made of a concrete floor slab instead of a bridge sleeper on an existing steel bridge.

It is a longitudinal cross-sectional view which shows the railway track of a composite structure system laid on the steel railway bridge. The fixed part of the floor slab for a track | orbit is shown, (a) is the arrow line view in FIG. 1 and (b) is the arrow line view in FIG. FIG. 2 is an enlarged view of a portion C in FIG. 1 showing a fixed portion of a track slab. The fixing bracket is shown, (a) is a bottom view, (b) is a side view, and (c) is a sectional view. It is sectional drawing of a taper washer. FIG. 2 is an enlarged view of a portion C in FIG. 1 showing a fixed portion of a track slab. (A), (b) is the C section enlarged view in FIG. 1 which shows other embodiment of the fixing | fixed part of the track floor slab. The other embodiment of the fixing | fixed part of the floor slab for a track | orbit is shown, (a) is a longitudinal cross-sectional view of the axial direction of a steel bridge, and (b) is a longitudinal cross-sectional view of the axial direction of a steel bridge. The other embodiment of the fixing | fixed part of the floor slab for a track | orbit is shown, (a) is a longitudinal cross-sectional view of the axial direction of a steel bridge, and (b) is a longitudinal cross-sectional view of the axial direction of a steel bridge. A metal fitting main body is shown, (a) is a bottom view, (b) is a side view.

Explanation of symbols

A Track slab fixing device ("Fixing device A")
B Track slab fixing device ("Fixing device B")
DESCRIPTION OF SYMBOLS 1 Steel bridge 1a Top flange 2 Track floor slab 3 Rail 4 Non-land surface adjustment material 5 Fixing metal fitting 5a Fixing part 5b Hanging part 5c Washer installation part 5d Bolt hole 5e Reinforcement rib 6 Fixing bolt 6a Bolt head 7 Taper washer 8 Insert 9 Lifting prevention metal fitting 9a Horizontal piece 9b Vertical bolt 10 Adjusting washer
10a Bolt hole 11 Bracket body
11a Mounting plate
11b coupling bolt
11c Bolt hole 12 Coupling plate 13 Coupling nut 14 Fixing bolt

Claims (4)

  A track slab fixing device for fixing a track slab on a steel bridge slab, attached to a lower surface portion of the track slab, abutting against the steel bridge slab, A taper that is provided with a fixing bracket that prevents movement, a fixing bolt and a taper washer that fix the fixing bracket to the lower surface portion of the track slab, and that is inclined in a direction perpendicular to the axis of the steel bridge to the fixing bracket. A washer installation part having a surface, an elongated bolt hole in the direction perpendicular to the axis of the steel bridge is provided in the washer installation part, and the fixing bolt is inserted into the bolt hole. Fixing device for floor slab.   A fixing device for a track slab for fixing a track slab on a steel bridge slab, which is attached to a lower surface portion of the track slab, and is in contact with the steel bridge slab of the track slab A fixing bracket that prevents movement; an adjustment washer that is interposed between the fixing bracket and the track slab; and that adjusts a vertical position of the fixing bracket; and the fixing bracket and the adjustment washer are connected to the track floor. A fixing bolt for fixing to the lower surface of the plate is provided, and the fixing bracket is provided with an elongated bolt hole in a direction perpendicular to the axis of the steel bridge, and the fixing bolt is inserted into the bolt hole. The fixing device for the floor slab for the track.   3. The track floor slab fixing device according to claim 1, further comprising a lift prevention metal fitting for preventing the track floor slab from rising.   The fixing device for a track slab according to any one of claims 1 to 3, wherein an unevenness adjusting material is installed between the steel bridge girder and the track slab.

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