Cast-in-place fiber technology

• US 9,062,423 B2
• Filed: 03/13/2014
• Issued: 06/23/2015
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Louisiana Tech Research Corporation, CenturyLink Intellectual Property LLC (Lumen Technologies, Inc.)
• Original Assignee: Louisiana Tech University Foundation Incorporated, CenturyLink Intellectual Property LLC (Lumen Technologies, Inc.)
• Inventors: Allouche, Erez N., Cady, Bryan, Elford, Michael L.
• Primary Examiner(s): LAGMAN, FREDERICK LYNDON
• Application Number:
  US14/209,754
• Publication Number:
  US 20140270971A1
• Time in Patent Office: 467 Days
• Field of Search: 405/155, 405/157, 405/179, 405/190, 405/184.4
• US Class Current: 1/1
• CPC Class Codes: E01C 23/09 for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
• CPC Class Codes: E01F 11/00 Road engineering aspects of Embedding pads or other sensitive devices in paving or other road surfaces , e.g. traffic detectors, vehicle-operated pressure-sensitive actuators, devices for monitoring atmospheric or road conditionspressure-sensitive elements G01L; traffic control systems G08G
• CPC Class Codes: E02F 5/10 with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables laying pipes per se F16L1/00, making pipes in situ F16L1/038; laying electric cables per se H02G1/06; drainage device- laying apparatus E02B11/02
• CPC Class Codes: F16L 1/028 in the ground F16L1/026 takes precedence
• CPC Class Codes: G02B 6/504 Installation in solid material, e.g. underground
• CPC Class Codes: H02G 9/00 Installations of electric cables or lines in or on the ground or water

Abstract

Novel tools and techniques for installing lines or cables, including, without limitation, power lines, low voltage lines, telecommunications lines or cables (e.g., telephone cables, network cables, television cables, etc.), and/or the like, and, in particular, installing optical fiber and/or other lines, slightly below ground level in a roadway or other ground surface. In some cases, a method might include creating a channel in the ground surface, placing one or more lines (e.g., power lines, low voltage lines, telecommunications lines, and/or the like) in the channel, and placing a capping material in the channel, thereby encapsulating the lines. In some cases, placing the one or more lines in the channel might include placing a conduit (containing the one or more lines) in the channel, and encapsulating the one or more lines might include encapsulating the conduit. The capping material might include polyurea, thermosetting material, and/or any other suitable material.

Claims

1. A method, comprising:

creating a channel in a ground surface;

placing at least one conduit in the channel, the at least one conduit having disposed therewithin one or more lines;

casting, in place, a capping material, comprising polyurea, around the at least one conduit to substantially fill the channel, such that a top surface of the capping material is substantially coplanar with a top of the ground surface.

2. The method of claim 1, wherein creating a channel comprises milling a channel.

3. The method of claim 1, wherein the capping material comprises a thermosetting material.

4. The method of claim 1, wherein the surface is a roadway surface.

5. The method of claim 1, wherein the capping material mechanically interlocks with pores in a material of the ground surface.

6. The method of claim 4, wherein the capping material serves as road lines on the roadway surface.

7. The method of claim 1, wherein the surface is a paved surface.

8. The method of claim 1, wherein the channel has a width of between about 0.5 inches and about 12 inches.

9. The method of claim 1, wherein the channel has a width of between about 1 inch and about 6 inches.

10. The method of claim 1, wherein the channel has a width of between about 1.5 inches and about 2.5 inches.

11. The method of claim 1, wherein the channel has a width of between about 0.5 inches and about 1 inch.

12. The method of claim 1, wherein the channel has a depth of no greater than about 3 inches.

13. The method of claim 1, wherein the channel has a depth of no greater than about 1 inch.

14. The method of claim 1, wherein the channel has a depth of no greater than about 0.5 inches.

15. The method of claim 1, wherein the one or more lines comprise at least one optical fiber.

16. The method of claim 1, wherein the one or more lines comprise at least one power line.

17. The method of claim 1, wherein the capping material comprises two or more sealant materials.

18. The method of claim 17, wherein the two or more sealant materials comprise a bottom sealant material filling a bottom portion of the channel and a top sealant material filling a top portion of the channel above the bottom sealant material, wherein the bottom sealant material comprises the polyurea and the top sealant material comprises a material selected from a group consisting of asphalt emulsion, asphalt cement, fiber modified asphalt, polymer modified emulsion, asphalt rubber, specialty asphalt rubber, low modulus specialty asphalt rubber, silicone, polyester, and cement mortar.

19. The method of claim 18, wherein the channel has a depth of about 3 inches, wherein the bottom sealant material fills the bottom portion of the channel to a height of about 2.5 inches and the top sealant material fills the top portion of the channel with a height of about 0.5 inches.

20. An apparatus, comprising:

at least one conduit disposed in a channel in a ground surface;

one or more lines disposed in the at least one conduit; and

a capping material, comprising polyurea, cast in place, around the at least one conduit in the channel in the ground surface, wherein a top surface of the capping material is substantially coplanar with a top of the ground surface.

21. The apparatus of claim 20, wherein the capping material comprises two or more sealant materials, wherein the two or more sealant materials comprise a bottom sealant material filling a bottom portion of the channel and a top sealant material filling a top portion of the channel above the bottom sealant material, wherein the bottom sealant material comprises the polyurea and the top sealant material comprises a material selected from a group consisting of asphalt emulsion, asphalt cement, fiber modified asphalt, polymer modified emulsion, asphalt rubber, specialty asphalt rubber, low modulus specialty asphalt rubber, silicone, polyester and cement mortar.