JP4182254B2 - Floating ladder sleeper, floating ladder track and laying method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floating ladder sleeper, a floating ladder track, and a laying method thereof.
[0002]
[Prior art]
In a conventional track using a lateral sleeper, the ballast buffer pressure locally increases because the rail is intermittently supported. For this reason, there is a possibility that a track error may occur due to a large influence of each wheel due to the train load.
[0003]
When this track deviation becomes large, the train shake increases and the ride quality decreases. For this reason, there has been a problem that maintenance work must be performed periodically in a relatively short period of time.
[0004]
Therefore, a ladder sleeper track that improves the dispersibility of the train load and efficiently absorbs the impact force and vibration caused by the train has been proposed.
[0005]
In this ladder sleeper track, a ladder sleeper is laid under a pair of rails instead of a horizontal sleeper. There are two types of ladder sleepers: a ballast ladder sleeper installed on a ballast laid on the roadbed, and a floating ladder sleeper installed on the roadbed without using ballast.
[0006]
FIG. 15 shows a floating ladder sleeper 1 (see, for example, Patent Document 1). The floating ladder sleeper 1 includes a pair of concrete longitudinal beams 6 extending along the longitudinal direction of the pair of rails, and a plurality of joint members 9 that connect the longitudinal beams 6.
[0007]
The floating ladder sleeper 1 includes a polyurethane 29 made of an elastic material that is intermittently disposed on the lower surface of the vertical beam 6 at a predetermined interval, and at least one of the outer rail side or the inner rail side of the vertical beam 6, A sleeper protrusion 30 protruding toward the outer track side, a polyurethane 32 made of an elastic material provided between the roadbed protrusion 31 and the longitudinal beam 6 provided in the vicinity of the sleeper protrusion 30 and between the roadbed protrusion 31 and the sleeper protrusion 30. I have.
[0008]
As shown in FIG. 16, the vertical beam 6 of the floating ladder sleeper 1 is installed on a pedestal (mortar base) 28 provided on the roadbed via polyurethane 29. A space d <b> 1 is formed between the vertical beam 6 and the pedestal 28 of the floating ladder sleeper 1. That is, the entire floating ladder sleeper 1 is supported only by the polyurethane 29.
[0009]
FIG. 17 is an example in which a pedestal 33 having an L-shaped cross section is provided along the entire length of the floating ladder sleeper 1 instead of the pedestal 28 and the roadbed protrusion 31.
[0010]
As shown in FIG. 18, the pedestal 33 has a horizontal portion 33 a that supports the lower surface of the vertical beam 6 and a vertical portion 33 b that supports the side surface of the vertical beam 6. A space d <b> 1 is provided between the vertical beam 6 and the horizontal portion 33 a of the pedestal 33. In addition, polyurethane 29 is intermittently provided in the interval d1.
[0011]
As shown in FIG. 17, the vertical portion 33 b of the pedestal 33 is provided to avoid the sleeper protrusion 30. That is, the vertical portion 33 b of the pedestal 33 is provided on both sides of the sleeper projection 30.
[0012]
And both sides of sleeper projection 30 are supported by vertical portions 33b of pedestals 33 on both sides via polyurethane 32.
[0013]
Further, a gap d <b> 2 is provided between the side surface of the vertical beam 6 and the vertical portion 33 b of the pedestal 33. Within this distance d2, polyurethane 34 is provided at a portion corresponding to the joint material 9. Polyurethane 32 is also provided at the root portion of sleeper protrusion 30 within the interval d2.
[0014]
The floating ladder track using such a floating ladder sleeper 1 can greatly reduce the time required for maintenance compared to a track using a horizontal sleeper. In addition, it has excellent load dispersibility of trains and has the effect of reducing noise and vibration.
[0015]
By the way, when constructing the above floating ladder track (see FIGS. 16 and 18), assembling the reinforcing bars of the pedestals 28 and 33 on the roadbed, installing the floating ladder sleeper 1 and rails, setting the planned rail level, and the pedestal 28 , 33 is formed in the order of assembling wooden formwork for forming, concrete placing, curing, demolding, and final adjustment of planned rail level.
[0016]
As described above, when the pedestals 28 and 33 are formed on the spot after the floating ladder sleeper 1 is installed, the distances d1 and d2 are formed in the vertical beam 6 and the pedestal 33 of the floating ladder sleeper 1 and the distances d1 and d2 are formed. In order to provide polyurethane 29, 32, and 34 in d2, when assembling the wooden formwork, a core is provided in a portion corresponding to the distances d1 and d2, and after placing concrete, the core is removed. There is a need to.
[0017]
However, it is normal that there are only narrow gaps below and on the side of the floating ladder sleeper 1, and the core provided between the longitudinal beam 6 and the bases 28 and 33 is removed from the outside after the concrete is placed. Have difficulty.
[0018]
Therefore, conventionally, before placing concrete, a foamed polystyrene core is provided on the lower and side surfaces of the floating ladder sleeper 1, and after the concrete is placed, the core is removed by melting with limonene liquid. .
[0019]
The reason for removing the foam core after placing the concrete is that if the core is left as it is, the deformation of the polyurethane 29, 32, 34 is obstructed by the core when the vehicle travels on the rail after the completion of the track. This is because the anti-vibration function cannot be exhibited effectively.
[0020]
Limonene is a main component of orange oil contained in citrus peels such as mandarin orange and lemon as is well known. This limonene has the property of dissolving styrene.
[0021]
[Patent Document 1]
JP 2001-214402 A
[0022]
[Problems to be solved by the invention]
However, the conventional floating ladder track laying method has a problem that it is difficult to completely remove and remove the foamed styrene core with limonene liquid, and a part of the foamed polystyrene remains.
[0023]
In this case, the remaining polystyrene foam may interfere with the vibration isolating function of the polyurethane 29, 32, 34. For this reason, it is necessary to completely remove the expanded polystyrene. For this purpose, a large number of work steps are required, which increases the cost.
[0024]
Moreover, the foamed styrene melt | dissolved by the limonene liquid liquefied, and there existed a possibility that this liquefied foamed styrene might flow out outside.
[0025]
On the other hand, there is a demand for laying a floating ladder track on a bridge using a PC (Prestressed Concrete) girder. In this case, it is necessary to fix the base of the floating ladder track to the PC girder.
[0026]
However, finish concrete such as drainage gradient concrete is usually placed on the PC girder, and since this finish concrete is thin, the reinforcing bars in the pedestal cannot be fixed.
[0027]
Further, since prestress is applied to the PC girder, it is not preferable to provide an anchor or the like for fixing the reinforcing bar in the base to the PC girder. It is conceivable to provide an anchor or the like in advance when manufacturing a PC girder at the factory, but in this case, since the position of the anchor is fixed, the degree of freedom is low when laying the floating ladder track at the site. Problem arises.
[0028]
Therefore, there is a demand for easily fixing the base of the floating ladder track by using a portion other than the PC girder.
[0029]
The present invention has been made in view of such problems, and can reduce the work man-hours during laying, and can easily be fixed on a bridge without affecting the PC girder, a floating ladder sleeper, a floating ladder track, and its The issue is to provide a laying method.
[0030]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems.
[0031]
That is, the present invention provides a pair of longitudinal beams disposed under the pair of rails over the entire length of the rails, a joint material connecting the pair of longitudinal beams, and intermittently provided on a lower surface of the longitudinal beams. Anti-vibration material and the longitudinal beam Outside In a floating ladder sleeper provided with a cushioning material provided intermittently on the side surface of the vertical beam, a portion of the lower surface of the vertical beam excluding the vibration isolating material and a side surface of the vertical beam excluding the cushioning material It is provided with a discard frame provided in a portion with almost no gap, Polyurethane foam and foamed polyethylene foam are laminated in two layers, Weight of vehicle traveling on the rail Deformation In doing so, the deformation is greater than the deformation amount of the vibration-proof material or the cushioning material.
[0032]
Further, the present invention provides a floating ladder track having a concrete pedestal provided on a roadbed, a floating ladder sleeper installed on the pedestal, and a pair of rails installed on the floating ladder sleeper. In the structure, the floating ladder sleeper has a pair of vertical beams disposed under the pair of rails over the entire length of the rails, and a joint material connecting the pair of vertical beams, and the pedestal is A horizontal portion provided below the vertical beam with a space; and a vertical portion provided on the side surface of the vertical beam with a space between the vertical beam and the horizontal portion. A vibration-isolating material provided in the space, a shock-absorbing material provided intermittently in the space between the vertical beam and the vertical portion, and a portion excluding the vibration-proof material in the space between the vertical beam and the horizontal portion Provided in And 捨型 frame that, the longitudinal beams and a 捨型 frame provided in a portion excluding the buffer material of the spacing between the vertical portion, the 捨型 frame, Polyurethane foam and foamed polyethylene foam are laminated in two layers, Weight of vehicle traveling on the rail Deformation When , The deformation is greater than the deformation amount of the vibration-proof material or the buffer material.
[0034]
Further, the present invention is a floating ladder sleeper having a pair of vertical beams installed under a pair of rails and a joint material connecting the pair of vertical beams on the roadbed, in front An anti-vibration material is intermittently provided on the lower surface of the vertical beam, a buffer material is intermittently provided on the side surface of the vertical beam, a formwork is provided around the floating ladder sleeper, and concrete is placed in the formwork. In the method of laying a floating ladder track that forms a pedestal that supports the floating ladder sleeper, in front The portion of the lower surface of the vertical beam excluding the vibration-proof material, and the portion of the side surface of the vertical beam excluding the buffer material, Polyurethane foam and foamed polyethylene foam are laminated in two layers, Weight of vehicle traveling on the rail Deformation Before Defense Vibration material Or the cushioning material Provided with a clearance frame that deforms more than the deformation amount of the above, there is no gap, the mold frame, the disposal frame and the anti-vibration material Or the cushioning material In the space surrounded by Above Concrete is cast, and the mold is removed while leaving the discarded mold after a predetermined period.
[0038]
In the present invention, the anti-vibration material and the cushioning material are provided on the lower and side surfaces of the vertical beam of the floating ladder sleeper, and the partless frame is provided in the portion excluding these anti-vibration materials. In doing so, when placing concrete for forming the pedestal, there is no need to provide a core for providing a space between the vertical beam and the pedestal.
[0040]
When the vehicle travels on the rail after completion of the track, the scraping frame will be deformed more than the deformation amount of the damping material or cushioning material, so that the damping material and cushioning material will not be affected by the discarding frame. Can be demonstrated.
Furthermore, when the discard frame is formed of two layers of polyurethane foam and foamed polyethylene foam, these materials can be easily obtained from the market, so that the cost can be reduced.
[0042]
It should be noted that the components and steps described above can be combined with each other without departing from the spirit of the present invention.
[0043]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0044]
(First embodiment)
[0045]
FIG. 1 shows a floating ladder sleeper 5 according to an embodiment of the present invention. The floating ladder sleeper 5 includes a pair of vertical beams 51 disposed under the pair of rails 50 over the entire length of the rails 50, and the vertical or negative side of the vertical beams 51, in this example, A sleeper protrusion 52 protruding toward the outer track side and a joint material 53 connecting the pair of vertical beams 51 are provided. In addition, the code | symbol 81 in FIG. 1 is a fixing tool which fixes the rail 50 to the vertical beam 51. FIG.
[0046]
As shown in FIG. 2, an anti-vibration material 55 provided intermittently is provided on the lower surface 54 of the vertical beam 51. In this example, the vibration isolator 55 is formed of polyurethane, but an elastic member other than polyurethane, such as elastic rubber, can also be used.
[0047]
Further, as shown in FIG. 3, a parting frame 61 is provided on the lower surface 54 of the vertical beam 51 excluding the vibration isolating material 55 without any gap.
[0048]
This discard frame 61 The Weight of the vehicle traveling on the wheel 50 Deformation In doing so, it is formed by a member that deforms more than the deformation amount of the vibration isolator 55.
[0049]
In this example, as shown in FIG. 4, the discard frame 61 has a polyurethane foam 62 and a foamed polyethylene foam 63 laminated in two layers. In this example, a foamed polyethylene foam 63 foamed about 30 times is used.
[0050]
Since the polyurethane foam 62 and the foamed polyethylene foam 63 can be easily obtained in the market, the cost can be reduced.
[0051]
As shown in FIG. 1, a buffer material 57 is intermittently provided on a side surface 56 on the outer rail side of the vertical beam 51, that is, on the sleeper projection 52 side.
[0052]
Further, cushioning materials 60 are provided on both side surfaces 58 and 59 in the longitudinal direction of the longitudinal beam 51 of the sleeper projection 52.
[0053]
These buffer members 57 and 60 are also formed of polyurethane, but elastic members other than polyurethane can also be used.
[0054]
Further, as shown in FIG. 5, a discard frame 61 is provided substantially without any gap on the side surface of the vertical beam 51 on the sleeper projection 52 side, excluding the buffer material 57.
[0055]
The discard frame 61 is also formed by laminating a polyurethane foam 62 and a foamed polyethylene foam 63 in two layers as described above (see FIG. 4).
[0056]
As described above, the floating ladder sleeper 5 of the present invention is provided with the vibration isolating material 55 and the shock absorbing material 57 on the lower surface 54 and the side surface 56 of the longitudinal beam 51, and the vibration isolating material 55 and the shock absorbing material 57 are removed from the portion. The disposal frame 61 was provided without a gap.
[0057]
Therefore, when laying the floating ladder track 7 (see FIG. 6), when placing concrete for forming the pedestal 71, it is necessary to form spaces d3 and d4 between the vertical beam 51 and the pedestal 71. There is no need to provide a child. Therefore, the construction of the floating ladder track 7 is facilitated.
[0058]
(Second Embodiment)
[0059]
Next, the floating ladder track 7 using the floating ladder sleeper 5 will be described with reference to FIG. In addition, the same code | symbol was attached | subjected to the part same as FIGS. 1-5, and detailed description was abbreviate | omitted.
[0060]
FIG. 6 shows a floating ladder track 7 according to the second embodiment of the present invention. The floating ladder track 7 includes a concrete pedestal 71 provided on the roadbed 70, a floating ladder sleeper 5 installed on the pedestal 71, and a pair of rails 50 ( (See FIG. 7).
[0061]
The floating ladder sleeper 5 has a configuration similar to that shown in FIG. Further, as shown in FIG. 7, the pedestal 71 is provided below the pair of vertical beams 51, 51 of the floating ladder sleeper 5.
[0062]
This pedestal 71 is provided over the entire length of the track. The pedestal 71 has a horizontal portion 72 provided below the vertical beam 51 with an interval d3 and a vertical portion 73 provided with an interval d4 with respect to the side surface of the vertical beam 51. . The horizontal portion 72 and the vertical portion 73 are formed in a substantially L shape.
[0063]
In this example, as shown in FIG. 8, a convex portion 74 and a concave portion 75 are provided on the upper surface of the horizontal portion 72 of the pedestal 71. And the vibration isolator 55 provided in the lower surface 54 of the vertical beam 51 is inserted in the space | interval d5 between this convex part 74 and the vertical beam 51. FIG.
[0064]
Further, the discard frame 61 provided on the lower surface 54 of the vertical beam 51 is inserted into a gap d <b> 3 between the concave portion 75 formed between the convex portions 74 of the pedestal 71 and the vertical beam 51.
[0065]
As shown in FIG. 6, in the space d <b> 4 between the vertical portion 73 of the pedestal 71 and the vertical beam 51, the cushioning material 57 provided intermittently on the side surface of the vertical beam 51, and the second discard frame 61. And are inserted.
[0066]
In this example, a cushioning material 57 provided at the root portion of the sleeper protrusion 52 is inserted in the interval d4 between the vertical portion 73 and the vertical beam 51.
[0067]
A sleeper protrusion 52 formed on the vertical beam 51 of the floating ladder sleeper 5 is inserted into a gap d6 formed on a vertical portion 73 of the base 71. The cushioning materials 60, 60 provided on both side surfaces of the sleeper protrusion 52 are inserted between the sleeper protrusion 52 and the vertical portion 73.
[0068]
When the vehicle travels on the floating ladder track 7, the vertical vibration is absorbed by the vibration isolating material 55 (see FIG. 8), and the horizontal vibration is absorbed by the shock absorbing material 57 (see FIG. 6). Moreover, the vibration in the front-rear direction is absorbed by the cushioning material 60 (see FIG. 6).
[0069]
As described above, the floating ladder track 7 of the present invention is provided with the vibration isolating material 55 intermittently provided in the gap d3 between the vertical beam 51 of the floating ladder sleeper 5 and the horizontal portion 72 of the base 71, and the vibration isolating material. A discard frame 61 is provided in a portion excluding 55.
[0070]
Further, the discard frame 61 is formed by laminating a polyurethane foam 62 and a foamed polyethylene foam 63 in two layers (see FIG. 3).
[0071]
So After When forming the pedestal 71 as described above, when placing concrete, the discard frame 61 is not deformed, and the function of the discard frame 61 as a mold is maintained.
[0072]
In addition, when the vehicle travels on the rail 50 after the completion of the floating ladder track 7, the scraping frame 61 is deformed more than the deformation amount of the vibration isolating material 55 and the buffer material 57.
[0073]
Therefore, the anti-vibration material 55 and the shock-absorbing material 57 can reliably exhibit the anti-vibration function and the shock-absorbing function without being affected by the discard frame 61.
[0074]
That is, the discard frame 61 functions as a mold when the pedestal 71 is formed, and has a strength that does not interfere with the vibration isolation function of the vibration isolation material 55 and the buffer function of the shock absorber 57 when the vehicle travels. In addition, in this example, the discard frame 61 is made into the two layers 62 and 63, However, If it is a material which has said function, it can shape | mold by one layer or three layers or more.
[0075]
(Third embodiment)
[0076]
Next, a method of laying the floating ladder track 7 will be described with reference to FIG.
[0077]
Here, first, reinforcing bars embedded in the pedestal 71 (see FIG. 7) are arranged (step 1). Next, the floating ladder sleeper 5 is installed at a predetermined position, and the rail 50 is installed thereon (step 2).
[0078]
Next, the planned rail level is set (step 3), and, for example, a wooden formwork is assembled around the floating ladder sleeper 5 (step 4).
[0079]
FIG. 10 shows a wooden formwork 76. This wooden formwork 76 is for forming the pedestal 71, and includes an inner formwork 77 provided on the inner ruler side of the vertical beam 51 in the floating ladder sleeper 5 and an outer formwork 78 provided on the outer track side. Have.
[0080]
These inner and outer molds 77 and 78 are provided over substantially the entire length of the rail 50 as shown in FIG.
[0081]
Next, as shown in FIG. 9, the concrete 80 (in the space 79 surrounded by the vibration isolating material 55 and the shock absorbing material 57 provided in the floating ladder sleeper 5, the discard frame 61, and the inner and outer mold frames 77, 78). (See FIGS. 10 and 11) (Step 5).
[0082]
Next, the concrete is cured, and the inner and outer molds 77 and 78 of the wooden mold 76 are removed. At this time, the discard frame 61 is left as it is (step 6). Thereafter, final planned rail level adjustment is performed (step 7).
[0083]
As described above, in the method for laying the floating ladder track 7 of the present invention, the discard frame 61 is left to the end, so that it is not necessary to dissolve and remove the discard frame 61 with limonene liquid or the like as in the prior art.
[0084]
Accordingly, it is possible to reduce the number of work steps and to prevent the liquid material dissolved in the limonene liquid from flowing out to the outside.
[0085]
(Fourth embodiment)
[0086]
FIG. 12 shows a fourth embodiment according to the present invention. In addition, the same code | symbol was attached | subjected to the same part as said floating ladder sleeper 5 (refer FIG. 1) and said floating ladder track | orbit 7 (refer FIG. 6), and detailed description was abbreviate | omitted.
[0087]
In the present invention, the floating ladder track 7 (see FIG. 6) is laid on a bridge 86 using a PC (Prestressed Concrete) girder 85. A plurality of PC girders 85, three in this example, are used.
[0088]
These PC girders 85 are arranged in parallel with respect to a direction Y that intersects the longitudinal direction X of the rail 50 (see FIG. 14). The PC girder 85 is manufactured in a factory or the like and transported to the site.
[0089]
On the PC girder 85, drainage gradient concrete 87 which is finished concrete is provided. The drainage gradient concrete 87 is provided with a downward gradient on both sides from the intermediate portion.
[0090]
Further, a path 88 and a balustrade 89 are provided for external measurement of the PC girders 85 on both sides. In this example, a passage 88 is provided on one side. These passages 88 and balustrades 89 are formed by placing concrete on site. The drainage gradient concrete 87 extends to the passage 88 and the balustrade 89.
[0091]
A gap 91 extending along the longitudinal direction X of the rail 50 (see FIG. 14) is provided between the PC girders 85 and 85 adjacent to each other, as shown in FIG. This gap 91 is filled with interstitial concrete 92.
[0092]
An anchor 93 is provided on the padded concrete 92. The upper side of the anchor 93 protrudes on the drainage gradient concrete 87.
[0093]
As shown in FIG. 12, a fixing beam member 95 protruding in the direction Y intersecting the longitudinal direction X of the rail 50 is provided on the base 71 of the floating ladder track 7. The beam member 95 is formed together with the pedestal 71 by spotting concrete. Further, the beam member 95 is formed at substantially the same height as the horizontal portion 72 (see FIG. 7) of the base 71.
[0094]
In this example, the beam member 95 protrudes to the outer track side and the inner track side of both pedestals 71. The beam members 95 provided on the inner rail side of the pedestals 71 and 71 are integrated on the left and right. One end portion (right end portion in FIG. 12) of the beam member 95 is disposed on the concrete concrete 92 between the PC girders 85.
[0095]
The other end (left end in FIG. 12) of the beam member 95 is disposed on the passage 88. An anchor 93 is provided in the passage 88. The anchor 93 is embedded in the beam member 95.
[0096]
A common horizontal reinforcing bar 96 is arranged in the base 71 and the beam member 95. The reinforcing bars 96 are welded to the anchoring concrete 92 and the anchor 93 provided in the passage 88.
[0097]
In this example, as shown in FIG. 14, the rail 50 extends obliquely with respect to the center line 86 a of the bridge 86. Therefore, the vertical beam 51 and the pedestal 71 of the floating ladder sleeper 5 are also installed in parallel with the rail 50. The beam member 95 protruding from the pedestal 71 is disposed at a right angle to the center line 86 a of the bridge 86.
[0098]
As described above, in the present invention, the reinforcing member 96 is provided on the beam member 95 provided on the base 71 of the floating ladder track 7, and the reinforcing concrete 96 is filled in the gap 91 between the PC girders 85, It is fixed to an anchor 93 provided in the passage 88.
[0099]
Since the interstitial concrete 92 and the passage 88 are sufficiently thick, the anchor 93 can be securely held.
[0100]
Therefore, there is no need to perform post-processing such as providing an anchor 93 on the PC beam 85, so that the floating ladder track 7 can be fixed without adversely affecting the PC beam 85.
[0101]
In this example, the anchor concrete 93 is provided in the gap concrete 92 and the passage 88. However, the gap concrete 92 is disposed on both sides of the beam member 95 according to the number of PC girders 85 and the installation position of the floating ladder track 7. If it is, the reinforcing bars 96 can be welded to the anchors 93 provided only on the interstitial concrete 92.
[0102]
【The invention's effect】
In the present invention, a vibration isolator is intermittently provided on the lower surface of the vertical beam of the floating ladder sleeper, a buffer material is intermittently provided on the side surface of the vertical beam, and the vibration isolating material and the buffer material are removed in a portion other than the vibration isolator. Since the frame is provided without a gap, it is not necessary to provide a core for providing a gap between the vertical beam and the pedestal when placing the concrete for forming the pedestal when constructing the floating ladder track. Therefore, work man-hours can be reduced.
[0103]
This rounding frame The stand When concrete is placed to form a seat, the discard frame functions as a mold frame.
[0104]
Further, when removing the mold after placing the concrete, the discard frame is left as it is, so that the number of work steps can be reduced. On the other hand, when the vehicle travels on the rail after the completion of the floating ladder track, the discard frame deforms more than the deformation amount of the vibration isolator and the shock absorber, so that the vibration isolator and the shock absorber are affected by the discard frame. The vibration-proof function and the buffer function can be exhibited without any problems.
When the discard frame is formed in two layers of polyurethane foam and foamed polyethylene foam, these materials can be easily obtained from the market, so that the cost can be reduced.
[0105]
In addition, a padding material is provided in the gap between the PC girders, and the anchors provided in the padding material are connected to the pedestal of the floating ladder track and the reinforcing bar in the beam member protruding from the pedestal. Floating ladder track can be fixed without giving
[Brief description of the drawings]
FIG. 1 is a plan view showing a floating ladder sleeper according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
FIG. 3 is a diagram showing a vibration isolator and a discard frame according to the first embodiment of the present invention.
4 is a cross-sectional view taken along the line BB in FIG.
FIG. 5 is a plan view showing the cushioning material and the discard frame according to the first embodiment of the present invention.
FIG. 6 is a plan view showing a floating ladder track of a second embodiment according to the present invention.
7 is a cross-sectional view taken along the line CC of FIG.
8 is a cross-sectional view taken along the line DD of FIG.
FIG. 9 is a flowchart illustrating a method for laying a floating ladder track according to a third embodiment of the present invention.
FIG. 10 is a plan view showing the assembled state of the mold according to the third embodiment of the present invention.
11 is a cross-sectional view taken along the line E-E in FIG. 10;
FIG. 12 is a cross-sectional view showing a bridge and a floating ladder track using a PC girder according to a fourth embodiment of the present invention.
FIG. 13 is a cross-sectional view showing interstitial concrete and an anchor filled between PC girders according to a fourth embodiment of the present invention.
FIG. 14 is a plan view showing a floating ladder sleeper and a beam member according to a fourth embodiment of the present invention.
FIG. 15 is a plan view showing a conventional example.
16 is a cross-sectional view taken along line FF in FIG.
FIG. 17 is a plan view showing another conventional example.
18 is a cross-sectional view taken along the line GG in FIG.
[Explanation of symbols]
1 Floating ladder sleeper
5 Floating ladder sleeper
6 Longitudinal beam
7 Floating ladder track
9 Joint material
28 pedestal
29 polyurethane
30 sleeper protrusion
31 Roadbed protrusion
32 polyurethane
33 pedestal
33a Horizontal part
33b Vertical part
34 polyurethane
50 rails
51 Longitudinal beam
52 sleeper protrusion
53 Joint material
54 Underside of vertical beam
55 Anti-vibration material
56 Side of longitudinal beam
57 cushioning material
58 Sides of sleeper protrusion
59 Side surface of sleeper protrusion
60 cushioning material
61 Discarding frame
62 Polyurethane foam
63 Foamed polyethylene foam
70 roadbed
71 pedestal
72 Horizontal part of pedestal
73 Vertical part of pedestal
74 Projection of pedestal
75 Recessed recess in pedestal
76 wooden formwork
77 Inside formwork
78 Outer formwork
79 space
80 concrete
81 Fixing tool
85 PC digits
86 Bridge
86a Bridge centerline
87 Drainage concrete
88 passage
89 Parapet
91 gap
92 Filled concrete
93 Anchor
95 Beam members
96 rebar

Claims (4)

A pair of vertical beams disposed under the pair of rails over the entire length of the rails, a joint material connecting the pair of vertical beams, and a vibration isolating material provided intermittently on the lower surface of the vertical beams; In a floating ladder sleeper comprising a cushioning material provided intermittently on the outer side surface of the longitudinal beam,
A portion of the lower surface of the vertical beam excluding the anti-vibration material, and a portion of the side surface of the vertical beam that is provided without any gaps in the portion excluding the buffer material,
The discard frame is formed by laminating polyurethane foam and foamed polyethylene foam in two layers, and when deformed by the weight of the vehicle traveling on the rail, it deforms more than the deformation amount of the vibration-proof material or the cushioning material. This is a floating ladder sleeper. In a laying structure of a floating ladder track having a concrete pedestal provided on a roadbed, a floating ladder sleeper installed on the pedestal, and a pair of rails installed on the floating ladder sleeper,
The floating ladder sleeper has a pair of vertical beams arranged over the entire length of the rails under the pair of rails, and a joint material connecting the pair of vertical beams,
The pedestal has a horizontal portion provided below the vertical beam with a space therebetween, and a vertical portion provided on the side surface of the vertical beam with a space therebetween,
Anti-vibration material provided intermittently in the interval between the vertical beam and the horizontal portion;
Cushioning material provided intermittently in the interval between the vertical beam and the vertical portion;
A disposal frame provided in a portion excluding the vibration isolating material in the interval between the vertical beam and the horizontal portion,
A discard frame provided in a portion excluding the cushioning material in the interval between the vertical beam and the vertical portion;
The捨型frame, polyurethane foam and polyethylene foam are laminated in two layers, when deformed by the weight of the vehicle traveling on the rail is deformed beyond the amount of deformation of the vibration proof material or the cushioning material Floating ladder track characterized by that. A floating ladder sleeper having a pair of vertical beams installed under the pair of rails and a joint material connecting the pair of vertical beams is installed on the roadbed,
Before Kitatehari lower surface intermittently provided an anti-vibration material, intermittently provided cushioning material on the side surfaces of the longitudinal beams,
A mold is provided around the floating ladder sleeper,
In the method of laying a floating ladder track, in which concrete is placed in the formwork to form a pedestal that supports the floating ladder sleeper,
Front portion excluding the vibration-proof material of the lower surface of Kitatehari, and the portion excluding the buffer material of the side surfaces of the longitudinal beams, and polyurethane foam and polyethylene foam are laminated in two layers, said rail When deformed by the weight of the vehicle traveling on the top, a disposal frame that deforms more than the deformation amount of the vibration isolator or the cushioning material is provided without a gap,
Said mold, and Da設the concrete to the捨型frame and the vibration proof material or the enclosed buffer material the space,
A method for laying a floating ladder track, wherein the formwork is removed while leaving the discarded formwork after a predetermined period.   A pair of vertical beams disposed under the pair of rails over the entire length of the rails, a joint material connecting the pair of vertical beams, and a vibration isolating material provided intermittently on the lower surface of the vertical beams; Of the lower surface of the vertical beam in a floating ladder sleeper provided with a buffer material provided intermittently on the outer side surface of the vertical beam, the portion excluding the vibration isolating material, or the side surface of the vertical beam A disposal frame provided in a portion excluding the cushioning material,
  When polyurethane foam and foamed polyethylene foam are laminated in two layers and deformed by the weight of the vehicle traveling on the rail, it deforms more than the amount of deformation of the vibration isolating material or the cushioning material. Discarding frame characterized by that.

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