Construction of track for rapid transit systems, such as light rail, involves the step of temporarily supporting properly leveled and positioned ties or sleepers within an excavated railway bed, followed by permanent fixation of the properly positioned ties within concrete cast into the excavated railway bed.
Achieving the necessary and desired temporary positioning and leveling of the ties within the excavated railway bed is difficult and time consuming.
Hence, a need exists for process and device capable of quickly, easily and reliably providing a properly positioned and leveled tie within an excavated railway bed prior to and during the permanent fixation of the tie within concrete.
A first aspect of the invention is an assembly for a levelable rail gauge leveling tie. A first embodiment of the assembly includes a longitudinally elongated rail gauge leveling tie, and first and second leveling studs. The leveling tie has (i) a longitudinally elongated central portion defining longitudinally spaced first and second ends, laterally spaced first and second sides, and transversely spaced upper and lower surfaces with the lower surface spaced in a first transverse direction from the upper surface, (ii) first and second flanges extending in the first transverse direction from the first and second sides of the central portion, respectively, and (iii) first and second transversely extending orifices through the central portion of the leveling tie proximate the first and second ends of the leveling tie, respectively. The first and second leveling studs each have proximal and distal ends, and are operable for threaded engagement within a corresponding orifice through the central portion of the leveling tie whereby rotation of a leveling stud within the corresponding orifice effects a change in the transverse distance between the distal end of the rotated leveling stud and the central portion of the leveling tie.
A second embodiment of the assembly further includes first and second electrically insulating riser plates and corresponding placement holes for the riser plates within the leveling tie. The placement holes includes a first pair of longitudinally offset transversely extending holes through the central portion of the leveling tie proximate the first end of the leveling tie, and a second pair of longitudinally offset transversely extending holes through the central portion of the leveling tie proximate the second end of the leveling tie. The first and second electrically insulating riser plates each having a pair of transversely extending openings with each opening surrounded by a transversely extending circumferential collar with the collars on each riser plate configured and arranged to snuggly fit within a corresponding pair of holes through the central portion of the leveling tie for aligning the riser plate upon the leveling tie.
A third embodiment of the assembly still further includes first and second strike plates each configured and arranged to rest upon a horizontal surface and capture the distal end of a corresponding vertically extending leveling stud so as to restrict horizontal movement of the captured distal end of the leveling stud.
A fourth embodiment of the assembly further includes first and second pairs of rail clips, each configured and arranged for threadable engagement within one of the holes through the central portion of the leveling tie for securing a corresponding riser plate and rail to the leveling tie with the riser plate electrically insulating the rail from the leveling tie.
A second aspect of the invention is a method of preparing a railway bed for the laying of railway track. A first embodiment of the preparation aspect of the invention includes the steps of (a) obtaining an assembly in accordance with the first embodiment of the assembly aspect of the invention, (b) threading the first leveling stud within the first orifice and threading the second leveling stud within the second orifice to form a studded leveling tie, (c) placing the studded leveling tie within an excavated railway right of way with the distal end of the leveling studs supported upon ballast at the bottom of the excavated railway right of way, (d) rotating the threaded leveling studs until the leveling tie is at a desired vertical height and at a desired angle along the lateral length of the leveling tie to form a leveled leveling tie, and (e) casting a castable material within the excavated railway right of way to fixate the leveled leveling tie.
A second embodiment of the preparation aspect of the invention includes the steps of (a) obtaining an assembly in accordance with the third embodiment of the assembly aspect of the invention, (b) resting the first and second strike plates upon ballast in an excavated railway right of way, (c) threading the first leveling stud within the first orifice and threading the second leveling stud within the second orifice to form a studded leveling tie, (d) placing the studded leveling tie within the excavated railway right of way with the distal end of the first leveling stud supported upon and captured by the first strike plate and the distal end of the second leveling stud supported upon and captured by the second strike plate, (e) rotating the threaded leveling studs until the leveling tie is at a desired vertical height and at a desired angle along the lateral length of the leveling tie to form a leveled leveling tie, and (f) casting a castable material within the excavated railway right of way to fixate the leveled leveling tie.
A third aspect of the invention is a method of constructing railway track. One embodiment of the construction aspect of the invention includes the steps of (a) obtaining an assembly in accordance with the fourth embodiment of the assembly aspect of the invention, (b) threading the first leveling stud within the first orifice and threading the second leveling stud within the second orifice to form a studded leveling tie, (c) placing the studded leveling tie within an excavated railway right of way with the distal end of the leveling studs supported upon ballast at the bottom of the excavated railway right of way, (d) rotating the threaded leveling studs until the leveling tie is at a desired vertical height and at a desired angle along the lateral length of the leveling tie to form a leveled leveling tie, (e) casting a castable material within the excavated railway right of way to fixate the leveled leveling tie, (f) attaching a first rail to the fixated leveling tie atop a first electrically insulating riser plate aligned upon the leveling tie with the first pair of rail clips, and (g) attaching a second rail to the fixated leveling tie atop a second electrically insulating riser plate aligned upon the leveling tie with the second pair of rail clips.
Nomenclature
10 Rail System
20 Rail Gauge Leveling Tie
20
a Upper Surface of Central Portion of Rail Gauge Leveling Tie
20
b Lower Surface or Underside of Central Portion of Rail Gauge Leveling Tie
20
c First Longitudinally Extending Flange on Rail Gauge Leveling Tie
20
d Second Longitudinally Extending Flange on Rail Gauge Leveling Tie
20
e First End of Rail Gauge Leveling Tie
20
f Second End of Rail Gauge Leveling Tie
21 Stiffening Plates (Collective)
21
1 First Stiffening Plate
21
2 Second Stiffening Plate
25 Nuts Attached to Underside of Rail Gauge Leveling Tie and Aligned with Orifices
Through the Tie
28 Orifice Through Rail Gauge Leveling Tie for Accommodating Passage of Leveling Stud
(Leveling Orifice)
29 Hole Through Rail Gauge Leveling Tie for Accommodating Passage of Rail Clip
Fastening Bolt (Fastening Hole)
30 Leveling Stud
30
d Distal End of Leveling Stud
30
p Proximal End of Leveling Stud
40 Electrically Insulating Riser Plate
40
a Top of Riser Plate
40
b Bottom of Riser Plate
40
c First Side of Riser Plate
40
d Second Side of Riser Plate
40
e Outside End of Riser Plate
40
f Inside End of Riser Plate
41 Electrically Insulating Inclined Riser Plate for Single Rail
42 Electrically Insulating Inclined Riser Plate for Double Rail
43 Circumferential Collars on Riser Plate
44 Standoff for Guide Angle
45 Electrically Insulating Plate for Guide Angle
49 Opening for Accommodating Passage of Rail Clip Fastening Bolt (Fastening Opening)
50 Round Washer
60 Lock Washer
70 Rail Clip Fastening Bolt
80 Guard Angle Fastening Bolt
90 Strike Plate
99 Centering Dimple or Orifice in Strike Plate
x Longitudinal Axis of Rail Tie
y Lateral Axis of Rail Tie
z Transverse Axis of Rail Tie
z1 First Transverse Direction
C Rail Clip
GA Guard Angle
R Rail
R1 Single Rail
R2 Double Rail
Construction
Referring to
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As shown in
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All components must be constructed from material suitable for use in railway track. Electrical insulation of the rails R from the balance of the track can be achieved by employing electrically insulating rail clips C and riser plates 40. Suitable electrically insulating materials include specifically but not exclusively, high durometer rubber, nylon, glass reinforced plastics, wood, etc.
Suitable rail clips C are available from a number of suppliers, including L.B. Foster Company of Suwanee, Georgia. A suitable electrically insulating rail clip C is one constructed of glass reinforced nylon 66.
Use
Referring to
More specifically, the assembly 10 may be employed to prepare a railway bed (not shown) for the laying of railway track R by (i) obtaining an assembly 10, (ii) threading a first leveling stud 30 within a first leveling orifice 28 proximate one end 20e of the leveling tie 20, (iii) threading a second leveling stud 30 within a second leveling orifice 28 proximate the other end 20f of the leveling tie 20, and (iii) optionally threading a third leveling stud 30 within the central leveling orifice 28 intermediate the ends 20e and 20f of the leveling tie 20 to form a studded leveling tie, (iv) placing the studded leveling tie (not collectively numbered) within an excavated railway right of way (not shown) with the distal end 30d of the leveling studs 30 supported upon ballast (not shown) at the bottom of the excavated railway right of way (not shown), (v) rotating at least one of the threaded leveling studs 30 until the leveling tie 20 is at a desired vertical height and at a desired angle along the lateral y length of the leveling tie 20 to form a leveled leveling tie 20, and (vi) casting a castable material (not shown) (e.g., concerete) within the excavated railway right of way (not shown) to fixate the leveled leveling tie 20 within the railway right of way (not shown).
When strike plates 90 are employed, a strike plate 90 is placed over the ballast (not shown) underneath each leveling stud 30 so that the distal end 30d of each leveling stud 30 will be supported upon and captured by a strike plate 90.
Railway track may be constructed using the assembly 10 by (i) obtaining an assembly 10, (ii) threading a first leveling stud 30 within a first leveling orifice 28 proximate one end 20e of the leveling tie 20, (iii) threading a second leveling stud 30 within a second leveling orifice 28 proximate the other end 20f of the leveling tie 20, and (iii) optionally threading a third leveling stud 30 within the central leveling orifice 28 intermediate the ends 20e and 20f of the leveling tie 20 to form a studded leveling tie, (iv) placing the studded leveling tie (not collectively numbered) within an excavated railway right of way (not shown) with the distal end 30d of the leveling studs 30 supported upon ballast (not shown) at the bottom of the excavated railway right of way (not shown), (v) rotating at least one of the threaded leveling studs 30 until the leveling tie 20 is at a desired vertical height and at a desired angle along the lateral y length of the leveling tie 20 to form a leveled leveling tie 20, and (vi) casting a castable material (not shown) (e.g., concerete) within the excavated railway right of way (not shown) to fixate the leveled leveling tie 20 within the railway right of way (not shown), (vii) attaching a first rail R to the fixated leveling tie 20 atop a first electrically insulating riser plate 40 aligned upon the leveling tie 20 proximate the first end 20e of the leveling tie 20 with a first pair of rail clips C and associated hardware (round washer 50, lock washer 60 and fastening bolt 70), and (viii) attaching a second rail R to the fixated leveling tie 20 atop a second electrically insulating riser plate 40 aligned upon the leveling tie 20 proximate the second end 20f of the leveling tie 20 with a second pair of rail clips C and associated hardware (round washer 50, lock washer 60 and fastening bolt 70).
This application claims the benefit of U.S. Provisional Application No. 61/491,399, filed May 31, 2011.
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Entry |
---|
“Transit Products Catalog” L B Foster Company, 2008. |
Metropolitan Council, CCLRT—Central Corridor Light Rail Transit, Contract No. 09P211.8454, Mar. 31, 2010, pp. 3-5. |
Number | Date | Country | |
---|---|---|---|
61491399 | May 2011 | US |