MACHINE AND METHOD FOR LAYING OF A SECOND CONCRETE SLAB OF A SLEEPERLESS RAIL-BED

• US 20110227241A1
• Filed: 07/08/2009
• Published: 09/22/2011
• Est. Priority Date: 07/08/2008
• Status: Abandoned Application

• Current Assignee: Ashtrom Group Limited (Unedco United Engineering & Development Co. Ltd.)
• Original Assignee: Ashtrom Group Limited (Unedco United Engineering & Development Co. Ltd.)
• Inventors: Nave, Shachar, Tamir, Dan
• Application Number:
  US13/002,558
• Publication Number:
  US 20110227241A1
• Time in Patent Office: Days
• US Class Current: 264/33
• CPC Class Codes: E01B 1/002 Ballastless track, e.g. concrete slab trackway, or with asphalt layers
• CPC Class Codes: E01B 29/005 Making of concrete parts of the track in situ
• CPC Class Codes: E01C 19/4873 Apparatus designed for railless operation

Abstract

A slip-form machine (220) for laying of a second concrete slab (120) of a sleeperless rail-bed including a locomotion mechanism (222, 232) adapted to provide axial translation of the machine along a first slab (110); a slip-form (370) adapted to receive concrete exiting a discharge port (336) via a rearward exit (340) and form an uncured second concrete slab (120) during the axial translation; and a height adjustment mechanism (360) operable to adjust a height of a cover (350) of a forward exit (338) with respect to the first concrete slab (110).

Claims

1. A slip-form machine for laying of a second concrete slab of a sleeperless rail-bed, the machine comprising:

a locomotion mechanism adapted to provide axial translation of the machine along a first slab;

a concrete feeder having an intake port and a discharge port, said discharge port comprising a forward exit facing in a direction of said axial translation and a rearward exit;

a slip-form adapted to receive concrete exiting said discharge port via said rearward exit and form an uncured second concrete slab during said axial translation; and

a height adjustment mechanism operable to adjust a height of a cover of said forward exit with respect to said first concrete slab.

2. A machine according to claim 1, comprising a feeder regulator adapted to maintain a height of concrete in said concrete feeder within predetermined limits.

3. A machine according to claim 1, comprising a pressure regulator adapted to maintain a hydrostatic pressure of concrete in said rearward exit within predetermined limits.

4. A machine according to claim 1, comprising a mounting bracket adapted to drag a flexible sheet over an upper surface of said uncured second concrete slab.

5. A machine according to claim 4, wherein said mounting bracket is provided as a horizontal bar.

6. A machine according to claim 1, wherein an aspect ratio (width to height) of said slip form is at least 10.

7. A method of paving a second concrete slab of a sleeperless rail-bed, the method comprising:

causing a slip-form machine to axially translate along a first slab;

feeding concrete into a concrete feeder having an intake port and a discharge port, said discharge port comprising a forward exit facing in a direction of said axial translation and a rearward exit; and

adjusting a height of a cover at least partially covering said forward exit with respect to said first concrete slab so that concrete exits said discharge port via said rearward exit and fills a slip-form positioned behind said rearward exit.

8. A method according to claim 7, comprising regulating a height of concrete in said concrete feeder.

9. A method according to claim 7, comprising regulating a hydrostatic pressure of concrete in said rearward exit.

10. A method according to claim 7 comprising attaching a flexible sheet to said slip-form machine and dragging said flexible sheet over an upper surface of an uncured second concrete slab formed by said slip form machine.

11. A method according to claim 10, wherein said attaching comprises attaching to a mounting bracket.

12. A method according to claim 11, wherein said mounting bracket is provided as a horizontal bar.

13. A method according to claim 7, wherein an aspect ratio (width to height) of said slip form is at least 10.