TWI344499B - Safety device for preventing rails from buckling - Google Patents

Safety device for preventing rails from buckling Download PDF

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Publication number
TWI344499B
TWI344499B TW099108902A TW99108902A TWI344499B TW I344499 B TWI344499 B TW I344499B TW 099108902 A TW099108902 A TW 099108902A TW 99108902 A TW99108902 A TW 99108902A TW I344499 B TWI344499 B TW I344499B
Authority
TW
Taiwan
Prior art keywords
buckling
fixing
sleeper
locking
plate
Prior art date
Application number
TW099108902A
Other languages
Chinese (zh)
Other versions
TW201104040A (en
Inventor
Hajime Hayashi
Original Assignee
Hayashi Soji Corp
Shin Goang Internat Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2009075664A priority Critical patent/JP4512661B1/en
Application filed by Hayashi Soji Corp, Shin Goang Internat Corp filed Critical Hayashi Soji Corp
Publication of TW201104040A publication Critical patent/TW201104040A/en
Application granted granted Critical
Publication of TWI344499B publication Critical patent/TWI344499B/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01BPERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B13/00Arrangements preventing shifting of the track
    • E01B13/02Rail anchors

Description

1344499 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a safety device for preventing buckling of a track in a railway. [Prior Art] Although the route of the railway is preferably linear, the smooth connection of the curved lines is not limited. In addition to the centrifugal force generated by the train traveling on the above-mentioned curved line, the "force that tilts the vehicle toward the outer side of the curve" is formed, and the vibration generated by the load of the moving vehicle cannot be avoided. The occurrence of deformation or positional offset. In view of this, the structure of the sleeper or the roadbed for reliably supporting and fixing the line is improved in terms of strength and economy, and further, a product made of a general-purpose steel wire reinforced concrete such as a sleeper is obtained. However, although the maintenance work of the line is progressing toward mechanization, the load of maintenance work based on manpower has not been greatly improved, especially in the summer, when there is a setback due to "line expansion caused by an increase in the track temperature", there is fear that In the case of a signal failure or a derailment accident, and there is a tendency to increase the load on the line maintenance operator, the line maintenance operation is strongly required to be rationalized, and even in addition to the foregoing requirements, the improvement of the equipment for preventing the accident is While paying attention to function and durability, it has also become economical. SUMMARY OF THE INVENTION -5 - 1344499 δ. W II, NON 丨 丨 . 一 一 一 一 一 [ [ [ [ [ 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有 有The buckling device can greatly improve the efficiency of equipment installation and repair while preventing railway line deformation and buckling, and can safely and quickly construct a "maintenance structure that is easy to maintain" and reduce the load on line maintenance work. A substantial savings in maintenance work and funding can be achieved. [Means for Solving the Problem] The anti-track buckling device of the present invention which achieves the above-described object is characterized in that it has a side end lower half fixing member 1 which can support the side of the sleeper, respectively. The bottom surface of the end portion, the lower end surface of the side end portion, the lower left side of the side end portion, the bottom wall of the lower right side of the side end portion, the lower front wall, the lower left wall, and the lower right wall also have an outer surface and a lower portion of the lower left wall. The outer surface of the right wall is protruded into a pair of right and left pairs of the mirror-symmetrical symmetrical shape, and a lower half gap through which the plate-shaped pile can pass is disposed between the lower end surface of the side end portion and the inner surface of the lower front wall. And the side end upper semi-fixing member 2, the side end upper semi-fixing member 2 can support the side surface of the side end of the sleeper, the upper end surface of the side end portion, the upper left side of the side end portion, and the side end portion, respectively. The upper right wall of the semi-right side, in addition to the upper front wall, the upper left wall, and the upper right wall, has a pair of left and right upper joints protruding outwardly from the outer surface of the upper left wall and the outer surface of the upper right wall. 'and between the upper end half of the side end and the inner side of the upper front wall a top half gap through which the plate-shaped pile body is inserted; and a left locking device 3 for combining the upper combined piece on the left side and the left side of the -6- 1344499 ιοά 3. 31 -ν: . · ! ' .: I ·· . t ~ ..w.··. _ · · · Lower binding piece; and right locking device 4, which is used to combine the right side The upper bonding piece and the lower bonding piece on the right side; and the buckling prevention pile plate 5 which can penetrate the upper half space and the lower half space from above. In the anti-track buckling device of the present invention, at least one of the side end lower half fixing member 1, the side end upper semi-fixing member 2, and each of the buckling prevention jaws 5 is preferably made of a ferroalloy casting product. In addition, the left end half lower fixing member 1 and the side end upper half fixing member 2 are coupled to each other by a pair of left and right lower bonding pieces and a pair of right and left upper bonding pieces respectively protruding from each other. The locking device 3 and the right locking device 4 are preferably made of steel bolts and nuts. [Effect of the Invention] The anti-track buckling device of the present invention is configured such that the left end lower fixing member 3 and the side end upper semi-fixing member 2 are mounted by using the left locking device 3 and the right locking device 4 to be locked from above and below. The side end portion of the sleeper is preferably the left and right end portions, and the buckling prevention pile plate 5 is penetrated from above. "The lower semi-fixing member 1 and the side end upper semi-fixing member 2, and the sleeper are provided at the side end portion. The gap between the side ends is further reduced by the buckling prevention of the pile 5 by pressing or pressing into the "conventional roadbed built with gravel, etc." and fixing the sleeper position of the sleeper relative to the roadbed. To prevent changes in the position of the track. Further, in the case where the depth of the buckling prevention preventing pile plate 5 is pressed toward the subgrade is fixed as in the position of the sleeper, it is only necessary to fix the buckling plate 5 by bolts to the upper end portion of the side end portion. The means of the member 2 can be combined. 1344499 iw 31 ,;! i,. _________: - [Embodiment] The track-preventing device of the present invention is a track on which a line constituting a railway is placed, and is used to prevent a specific position for being placed on a roadbed. The sleeper is moved by a variety of external forces that occur in the "vehicle on the track or the track itself," thereby causing a risk of skewing the shape of the line. Next, the present invention is a strain stress generated in a line as described above, which is obtained by temporarily impinging the sleeper itself, and transforming the elastic deformation of the track into a plastic deformation of the roadbed, thereby canceling the invention. Therefore, the anti-track buckling apparatus A of the present invention will be described in detail below based on the drawings. Fig. 1 is a view showing an example of a state in which the anti-track buckling device of the present invention is assembled, and S in the figure is a concrete sleeper (in a hypothetical state) which is reinforced such as a PRE-TENSIONING steel wire. And 1 has a shape of "the end surface, the left side surface, the right side surface, and the bottom surface portion of the lower half portion S1 which can cover the side end portion of the sleeper S at the same time", and is, for example, a side end made of cast steel or the like. Lower half of the fixed component. Then, the second embodiment has a shape in which "the end faces, the left side, the right side, and the upper surface portion of the upper side portion S2 of the same sleeper S can be covered at the same time", and is, for example, a side end portion made of cast steel or the like. Semi-fixed component. Although the drawing does not explicitly indicate which portion of the side end of one side of the sleeper S, the portion covered by the member of the reference numeral 1 is the lower half of the side end of one side of the sleeper S. The portion S1, the portion covered by the member marked with the number 2, is 1344499.1.00,,: 1. The upper half S2 of the side end of the same sleeper S, and the member of the figure 1 and the figure 2 The parts covered by the members are collectively referred to as side end portions. The structure of the side end lower half fixing member 1 described above will be described in detail with reference to Fig. 2, wherein (a) in Fig. 2 is a plan view and (b) is a front view. '(c) is a bottom view, (d) is a rear view, and (e) is a longitudinal cross-sectional view at a cutting position of (d). In each of the above-mentioned drawings, la is the bottom wall of the side end lower half fixing member 1, and a convex strip having an acute ridge line is provided on the upper surface of the bottom wall to form the bottom surface of the side end portion S 0 of the sleeper S. It will not be carried by sliding. Next, at a position where the bottom wall 1a is covered, a lower front wall lb for covering the end surface is provided in a manner of "remaining a space in front of the end of the side end portion S1 of the sleeper S", and is in addition to the lower front wall lb. The left end portion, the upper end portion and the lower end portion of the center position, and the right end portion are provided with a space for maintaining the end faces of the side end portions S 1 of the sleepers S, in addition to the protrusions for maintaining the gaps le, If, lg, and lh, The pair of apertures 1 j of the gap between the end surface of the side end portion S 1 of the S and the lower front wall 1 b is not limited to this, except that the lower half S 1 for the side end portion of the sleeper S is provided. In addition to the lower left wall lc and the lower right wall Id of the left side and the right side of the right side, a pair of pile plate through holes lk and 1 k ° are formed, which are described in detail according to FIG. The configuration of the upper half of the upper half S2 of the side end portion of the sleeper S is the upper half fixing member 2. Fig. 3(a) is a plan view, (b) is a front view, (c) is a bottom view, (d) is a rear view, and (e) is a longitudinal cross-sectional view at a cutting position of (d). In each of the above-mentioned drawings, 2a is the upper surface of the side of the sleeper S -9 - ' 0 1344499 l 〇 0. 3 1 • ♦ · « The upper wall of the upper end half of the side fixing member 2 The lower surface of the upper wall 2a is the same as the bottom wall 1a of the side lower half fixing member 1, and is provided with a ridge having an acute ridgeline. Therefore, the upper wall 2 of the upper surface of the side end of the sleeper 3 is placed. a will not have a slippery slip. Then, at the position where the upper wall 23 is covered, the upper front wall 2b' for covering the end surface is provided in a manner of "remaining a space in front of the end of the side end S 2 of the sleeper s" except for the upper front wall 2b. The upper end portion and the lower end portion of the center position are provided with end faces for retaining the gaps 2e and 2f for supporting the end faces of the side end portions S2 of the sleepers 3, and 'end faces and upper faces for observing the side end portions S2 of the sleepers S are also provided. In addition to the pair of windows 2g and 2g' of the gap between the walls 2b, "the left side and the right side of the upper half S2 of the side end portion of the sleeper S are respectively guided to the appropriate positions". In addition to the upper left wall 2c and the upper right wall 2d, a pair of pile plate through holes 2 h, 2 h are formed. Next, a left lower joint piece lm provided with a left bolt through hole and a lower right joint piece 1 η provided with a right bolt through hole are provided on the left and right side faces of the upper edge of the lower end semi-fixing member 1 adjacent to the side end portion, which are left and right 1 The opposite method is horizontally protruded into a mirror symmetry. Further, on the left and right side faces of the lower edge of the upper semi-fixing member 2 near the side end portion, the upper left coupling piece 2m provided with the left bolt through hole and the upper right coupling piece 2n provided with the right bolt through hole are one pair of right and left. The method is horizontally protruded into a mirror symmetry. Next, the side end lower half fixing member 1 and the side end upper half fixing member 2 are assembled up and down on the lower half and the upper half of the same side end portion of the same sleeper S, because the upper left combined piece 2 m is located above 1 m of the lower left bonding piece, and the upper right bonding piece 2n is also formed above the lower right bonding piece In, so that the bolt and the nut are -10- 1344499, 1〇〇Π^^~7ΐ • ' n" i_._—— The formed left locking device 3 can penetrate the left bolt through hole and the left bolt through hole, and the left lower joint piece 1 m and the upper left combined piece 2m are tightly combined, and further, 'by bolt and screw The right locking device 4 formed by the cap can penetrate the right bolt through hole and the right bolt through hole ', and the right lower bonding piece 1 〇 and the upper right bonding piece 2n are tightly coupled. Therefore, the same side end portion of the sleeper S is held between the side end upper semi-fixing member 2 and the side end lower half fixing member 1, and is securely locked from the upper and lower sides, thus being manufactured in steel or the like. In the state where any one of the locking members 3 or 4 is not damaged, there is no doubt that the device is disassembled. In this way, the side end lower half fixing member 1, the side end upper semi-fixing member 2, the left locking device 3 and the right locking device 4 are assembled to the intermediate assembly device formed by the sleeper S (all the components are not completed) In the upper end position, a pair of pile plate through holes 2h and 2h are formed, and the end portion of the side end portion S 0 remaining on the sleeper S and the front end portion 2b on the side end upper semi-fixing member 2 are continuously continuous. a longitudinal gap between the inner surface and the inner surface of the front wall 1 b below the lower end semi-fixing member 1 , the gap finally ending in a pair of pile plate through holes 1 k ,
The opening of Ik. Therefore, in the longitudinal gap remaining in the above-described intermediate assembly device, the buckling prevention pile plate 5' made of a cast iron material such as FCD450 having vibration damping energy as shown in Figs. 4 and 5 is The pile plate through hole 2h at the upper end of the device is inserted 'and protrudes from the pile plate through hole 1k at the lower end'. The process of inserting the buckling prevention plate 5 is permeable to the window hole 2g provided in the upper front wall 2b or the lower front wall 1b or Observing the window hole lj, it is only necessary to screw the fixing bolt 6' inserted from the above-mentioned window hole 2g or the window hole 1 j to the female screw hole -11 - 1344499 5b of the buckling prevention pile plate 5, thereby preventing buckling The pile plate 5 is coupled to the upper front wall 2b and the lower front wall 1b to suppress fluctuations in the installation position of the pile preventing plate 5 after the completion of the anti-track buckling device of the present invention. By the way, in the anti-track buckling apparatus A of the present invention, once the installation position of the buckling prevention sill 5 is fixed as described above, it is feared that buckling prevention is prevented in the case where it is not possible to correspond to different soil types such as roadbeds. The shape or size of the pile plate 5 is not easily changed. Therefore, the buckling prevention pile plate 5 attached to the orbital buckling prevention device of the present invention is configured to be releasable, but as a part that can be exchanged selectively, it is of course necessary to prepare a plurality of types of buckling prevention for different functions or performances. Seesaw. Therefore, the use of the parts shown in Fig. 6 for the buckling prevention pile plate 7 of different functions will be described below. In the buckling prevention pile plate 7 shown in Fig. 6, in order to facilitate the driving into the roadbed, in addition to the narrowing of the plate width toward the front end, the shackle projections 7c are continuously provided, and the sliding slits 7b are provided. Instead of the female screw hole 5b provided in the buckling prevention pile plate 5. "The above-described buckling prevention pile plate 7 is inserted from the pile plate through hole 2h at the upper end of the device, and the guide pin movable along the sliding slot 7b is assembled in the window hole 2g or the window hole lj." The anti-track buckling device B has a form in which "the buckling prevents the front end of the pile plate 7 from protruding from the pile plate through hole 1k and enters the roadbed", and the vibration of the sleeper S is in the roadbed and the buckling prevention pile plate 7 A vibration having a phase difference is caused between them, with the result that the buckling prevention pile plate 7 can become deeper in the length of the sliding slot 7b.
Further, with regard to the anti-track buckling device of the present invention, it has been described so far that "the anti-track buckling device of the present invention is provided in the sleeper S -12-1344499
' uJ 1〇0| -i ^ . i I :.: l -· · ......- · One side of the side end". However, the device of the present invention has a bilaterally symmetrical configuration in nature, and the anti-track buckling device of the present invention is provided at the side end portion of the other side of the sleeper S having a bilaterally symmetrical structure, without any natural. Therefore, the method of preventing the orbital buckling device of the present invention is provided at the side end portions of both of the sleepers S, which means that the effect is doubled, even from the viewpoint that "the railway line is composed of two tracks" It can also be said to be reasonable. If, as mentioned above, it is considered that a large number of sleepers are placed on the roadbed at specific intervals in the railway line. In order to complement the stability of the soil in the construction of the roadbed, "the required number of inventions is required. The method of preventing the orbital buckling device from being continuously provided to the adjacent sleepers is effective, and Fig. 8 shows an example of the construction form of the present invention provided in the above manner. In this example, the side end portions of one of the adjacent sleepers S and S are provided, for example, to prevent the rail buckling device B, and the terminal member 8a and the extension member 8b are connected by bolts and nuts. The connecting device 8 formed is a means for connecting the upper end portion of the left locking device 3 of the track buckling preventing device B to the upper end portion of the right locking device 4 of the left side preventing buckling device B. In addition, the interval between the sleepers S and S is fixed to a desired enthalpy. Next, the case where the track preventing device of the present invention is installed in an existing railway line will be described. After the rail and the sleeper located at the "desired installation position in the line" are removed, the intermediate assembly device described above is disposed on the roadbed, and the rail installation operation is performed according to the procedure of the general line replacement operation. -13- 1344499
At the time point when the correction of the mounting position of the rail is completed, the buckling preventing jaw is inserted into the seesaw through hole 2h of the intermediate assembling device, and the means for preventing the head 5a of the curling plate by tapping or pressing the buckling causes the buckling The prevention of the track buckling device of the present invention is completed by preventing the pile plate from sinking into the roadbed until the necessary depth. Further, between the above-mentioned buckling prevention work of the pile plate, it is preferable to perform work such as attaching or locking the fixing bolt 6 as needed. [Industrial Applicability] The anti-track buckling device of the present invention originally prevents the purpose of "acceleration caused by buckling caused by the rise of the temperature of the track during the season of high temperature". It is known from practical tests that a substantially satisfactory result can be obtained. However, from the viewpoint of the structure and the mechanism of the device, it is not limited to simply preventing the buckling of the track, and it is expected to be a safety device applied as a railway laid on the ground. And widely used. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the appearance of an assembly preventing state of the track buckling device A in the present invention. Fig. 2 is a view showing the structure of the lower end fixing member of the side end portion of the above-described anti-track buckling device, wherein (a) is a plan view, (b) is a front view, (c) is a bottom view, and (d) is a rear view. The view, (e), is a longitudinal sectional view at the cutting position of (d). Fig. 3 is a view showing the structure of the upper end fixing member of the side end preventing deflection device, wherein (a) is a plan view, (b) is a front view-14-1344499, ····_图' ( C) is a bottom view, (d) is a rear view, and (e) is a longitudinal cross-sectional view at a cutting position of (d). Fig. 4 is a view showing the structure of the buckling prevention pile plate in the above-described anti-track buckling device, wherein (a) is a front view, (b) is a side view, and (c) is a cross-sectional view. Fig. 5 is an explanatory view showing a step of assembling the anti-track buckling device of the present invention to a sleeper. Fig. 6 is a view showing the configuration of another example of the buckling preventing dam in the track preventing buckling device of the present invention, wherein (a) is a front view and (b) is a side view. Fig. 7 is an explanatory view showing a procedure of assembling the sleep preventing rock buckling device of the present invention using the buckling prevention pile plate of the example of Fig. 6 to the sleeper. Fig. 8 is a perspective view showing another example of the construction form of the anti-track buckling device of the present invention. [Description of main component symbols] A, B: Preventing orbital buckling device S: Sleeper S 0 : Side end portion S 1 of the sleeper s: Lower half of the side end portion S 2 : Upper half of the side end portion 1: Side End lower half fixing member U: bottom wall -15- 1344499 ί..., : I r ' - Ί ...-] lb : lower front wall 1 c : lower left wall Id : lower right wall 1 e, 1 f, 1 g, 1 h : protrusion for maintaining the gap 1 j : window hole 1 k : pile plate through hole 1 m : lower left joint piece 1 η : lower right joint piece 2 : side end upper half fixing member 2a : upper wall 2b : upper Front wall 2c: upper left wall 2d: upper right wall 2e, 2f: gap maintaining protrusion 2g: window hole 2h: pile plate through hole 2m: upper left bonding piece 2n: upper right bonding piece 3: left locking device 4: right Locking device 5: buckling prevention pile plate 5a: head 5b: female threaded hole 6: fixing bolt-16-1344499 10C. 7: buckling prevention pile plate 7a: head 7b: sliding slot 7c: 掣 stop protrusion 8: coupling device 8 a : terminal member 8 b : extension member -17-

Claims (1)

  1. 1344499,. VII. Patent application scope: 1. A device for preventing orbital buckling, which is characterized in that it has the following structure: a side end lower semi-fixing member 1 which can support the sleeper respectively. The bottom end bottom surface, the side end lower half end surface, the side end lower half left side, the bottom end lower half right side bottom wall, the lower front wall, the lower left wall, and the right wall have an outer surface and a lower side of the lower left wall The outer surface of the right wall is provided with a pair of right and left pairs of mirror-symmetrical yokes, and a plate-like pile body is disposed between the side end half end surface and the inner surface of the lower front wall through the lower half space; and The side end upper semi-fixing member 2, the side end upper semi-fixing member 2 can respectively support the upper end surface of the sleeper, the upper end surface of the side end portion, the upper left side of the side portion, and the upper right side of the side end portion. The upper wall, the upper front wall, and the upper left wall and the right wall further have a pair of left and right upper bonding pieces which are formed in a mirror-symmetric shape on the outer surface of the upper left wall and the outer surface of the upper right wall, and Between the upper end half end surface and the inner surface of the upper front wall, a plate-like body can be arranged The upper half of the gap; and the left locking device 3, the left locking device 3 is for combining the upper and lower left binding pieces: and the right locking device 4, the right locking device 4 is a lower bonding piece for combining the upper and lower right and the lower side; and a buckling preventing gusset 5 which can penetrate the front upper half space and the lower half space from above. 2 · As described in the first paragraph of the patent application, the prevention of orbital buckling is carried out under the lower part of the section > face-to-face engagement -18- 1344499 ι〇{Γ^- 佟i year"κ ., F________ wherein at least one of the side end lower half fixing member 1, the side end upper half fixing member 2, and each of the members of the buckling prevention pile plate 5 is formed of a ferroalloy cast product. -19-. Patent Application No. 099108902 1: > Bamboo + Text Revision Page Amendment of March 31, 100
    1344499 Grab 3 Ends '·'>· Λ ; Figure 6
    1344499
    Co 1344499 1Π〇. I 3!
    1344499 IV. Designated representative map: (1) The designated representative circle of this case is: (1). (2) A simple description of the symbol of the representative circle: s: sleeper S 0 : side end portion 1 of the sleeper S: side end lower half fixing member lb: lower front wall 1 e : protrusion for maintaining the gap 1 j : window hole 1 m : lower left joint piece 1 η : lower right joint piece 2 : side end upper half fixing member 2a : upper wall 2h : pile plate through hole 2 η · upper right joint piece 3 : left lock 4 : right lock 5 : buckling prevention pile plate 5a: head 5b: female threaded hole 6: fixing bolt -3- 1344499 1〇4 I
    5. If there is a chemical formula in this case, please reveal the chemical formula that best shows the characteristics of the invention: none
TW099108902A 2009-03-26 2010-03-25 Safety device for preventing rails from buckling TWI344499B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009075664A JP4512661B1 (en) 2009-03-26 2009-03-26 Rail buckling prevention safety device

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TWI344499B true TWI344499B (en) 2011-07-01

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JP5543296B2 (en) * 2010-08-23 2014-07-09 保線機器整備株式会社 Fasteners for concrete sleepers
US10349491B2 (en) 2015-01-19 2019-07-09 Tetra Tech, Inc. Light emission power control apparatus and method
CA2892885C (en) 2015-02-20 2020-07-28 Tetra Tech, Inc. 3d track assessment system and method
JP5852762B1 (en) * 2015-07-08 2016-02-03 林総事株式会社 Rail buckling and anti-movement safety device
KR101634127B1 (en) * 2015-08-13 2016-06-29 한국철도기술연구원 Apparatus for restraining horizontal-vertical movement of wide sleeper and slab panel, and construction method for the same
US10378459B2 (en) * 2017-03-23 2019-08-13 Ford Global Technologies, Llc Method and system for engine control
JP6317850B1 (en) * 2017-11-27 2018-04-25 林総事株式会社 Sleeper with buckling prevention function and movement prevention function
US10730538B2 (en) 2018-06-01 2020-08-04 Tetra Tech, Inc. Apparatus and method for calculating plate cut and rail seat abrasion based on measurements only of rail head elevation and crosstie surface elevation
US10807623B2 (en) 2018-06-01 2020-10-20 Tetra Tech, Inc. Apparatus and method for gathering data from sensors oriented at an oblique angle relative to a railway track
US10625760B2 (en) 2018-06-01 2020-04-21 Tetra Tech, Inc. Apparatus and method for calculating wooden crosstie plate cut measurements and rail seat abrasion measurements based on rail head height
WO2020232431A1 (en) 2019-05-16 2020-11-19 Tetra Tech, Inc. System and method for generating and interpreting point clouds of a rail corridor along a survey path

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JPS5257526Y2 (en) * 1972-10-12 1977-12-27
JPH0341957U (en) * 1989-09-01 1991-04-22
JP3349912B2 (en) * 1997-02-14 2002-11-25 日本軌道工業株式会社 Rail buckling prevention device
JP3572260B2 (en) * 2001-01-16 2004-09-29 林総事株式会社 Crossties and railway branching devices

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