US20040120773A1 - Protection element, method for laying cable in a groove system and cable layout - Google Patents

Protection element, method for laying cable in a groove system and cable layout Download PDF

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Publication number
US20040120773A1
US20040120773A1 US10/688,938 US68893803A US2004120773A1 US 20040120773 A1 US20040120773 A1 US 20040120773A1 US 68893803 A US68893803 A US 68893803A US 2004120773 A1 US2004120773 A1 US 2004120773A1
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United States
Prior art keywords
cable
protection element
groove
conduit
element according
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Legal status (The legal status 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 status listed.)
Abandoned
Application number
US10/688,938
Inventor
Hong Li
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Alcatel Lucent SAS
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Alcatel SA
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Publication date
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Assigned to ALCATEL reassignment ALCATEL ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LI, HONG
Publication of US20040120773A1 publication Critical patent/US20040120773A1/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
    • H04J3/0632—Synchronisation of packets and cells, e.g. transmission of voice via a packet network, circuit emulation service [CES]

Definitions

  • the invention relates to a protection element to be installed over a conduit or cable inside a surface grooves, and to a method for laying cables or conduits in a groove system and a cable layout consisting of a conduit or cable system where one or more cables or conduits are fitted in grooves.
  • the underlying problem consists in that in these cases the cables are installed directly in small grooves, normally not deep enough and with the cable tightly connected with the street surface, and thus not enough protected from external effects (mechanical, traffic and temperature) which will impact on the groove cable directly.
  • the groove cable may suffer from strong temperate fluctuation on the street surface, which could cause the cable to exceed its maximal elongation margin.
  • a proposed solution for this problem is found in French Patent Application FR 2 750 717 where a thermal protection layer in the form of a tape may be placed over the cable, between the cable and the refilling material. But here the tape layer only protects the cable from the top, leaving the side walls of the groove, which may be in contact with the cable, without protection. Also, the tape layer may not oppose enough resistance to maintain the cable or itself fixed to the bottom of the groove before and after installation.
  • groove cable structures are not cleanly marked for later discovery and thus exposed to damaged provoked by other civil work on the streets or, in case of cable repair work, this would lead to a very time consuming process because the area has to be carefully excavated.
  • the present invention therefore proposes a protection element in the form of a three-walled casing which is to be installed over the conduit or cable before sealing the groove, in order to solve the problems described above.
  • the protection element serves, for example, as an isolation layer between the groove cable or conduit and the filling compound and the groove walls, which allows the groove cable to achieve positive static conditions, i.e. free stretching conditions.
  • a protection element with the characteristics according to the present invention can compensate the mechanical effects on the groove cables, caused on the streets and from the traffic.
  • Still another object of the protection element is to serve as detective wire so that the groove can be easily identified.
  • the object is achieved according to the invention by a protection element according to claim 1 , a method for laying cables or conduits in a groove system according to claim 5 and a cable layout wherein one or more cable or conduits are fitted in grooves according to claim 6 .
  • FIGS. 1 to 2 An embodiment example of the invention is now explained with the aid of FIGS. 1 to 2 .
  • FIGS. 1A,B shows a protection element in the form of a three-walled casing according to the invention.
  • FIG. 2A,B shows another possible embodiment for the protection element in the form of a three-walled casing with a different design compared with FIG. 1.
  • FIG. 1A shows a groove 2 formed into solid ground 1 , the groove comprising a cable or conduit 5 , a protection element 4 in the form of a three-walled casing and a refilling compound layer 3 over the protection element 4 .
  • the protection element 4 shown in FIG. 1B has the form of a casing, which comprises a top 4 a and two side walls 4 b , 4 c , and has three projections 4 d sticking out to the outside O in the upward direction from each of the side walls 4 b , 4 c.
  • a groove 2 is created using a cutting or heating device.
  • the cable or conduit 5 with the protection element 4 housing it is fitted in the groove 2 and after that, the filling compound 3 will be poured into the groove for sealing.
  • the protection element 4 can be made of a metallic tape or steel wire net wrapped with elastic foam material, thus allowing it to be used for easy identification of the groove and for cable recovery purposes. But if no identification is needed, it can also be made of hard plastic or hard gummy material.
  • the protection element 4 is also used to fix the cable to the bottom of the groove 2 before sealing and to keep it in this position afterwards, even if temperature fluctuation occur.
  • the projections 4 d oppose more resistance to a possible upward movement forced by the cable or conduit 5 .
  • FIG. 2A shows a groove 2 formed into solid ground 1 , the groove comprising a cable or conduit 5 , a protection element 4 ′ in the form of a three-walled casing with a different design as compared with FIG. 1 and a refilling compound layer 3 over the protection element 4 ′.
  • the particular embodiment of the protection element 4 ′ shown in FIG. 2B has the form of a casing, which comprises a top 4 a and two side walls 4 b , 4 c , and has at least one projection 4 e sticking out to the inside I from each of the side walls 4 b , 4 c , which oppose also resistance to a possible upward movement forced by the cable or conduit 5 .

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Hardware Design (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Communication Control (AREA)

Abstract

The invention relates to a protection element which is installed over a conduit or cable fitted in a groove formed into solid ground, which has the form of a three-walled casing with a top and two side walls. The invention also relates to a method for laying cables or conduits in a groove system created into solid ground and to a cable layout, consisting of a conduit or cable system, wherein one or more cable or conduits are fitted in grooves which are located at the surface of the laying foundation.

Description

    BACKGROUND OF THE INVENTION
  • The invention relates to a protection element to be installed over a conduit or cable inside a surface grooves, and to a method for laying cables or conduits in a groove system and a cable layout consisting of a conduit or cable system where one or more cables or conduits are fitted in grooves. [0001]
  • Methods for laying cables or conduits with optical and electrical information cables in grooves of firm laying foundations are known. These methods relate to the laying of cables in highway or urban area road routes by means of mini-trench cutting operations for rapid duct installation, which minimize the impact on traffic. The process involves creating a shallow groove in the asphalt, laying the cable into this groove and sealing it afterwards. For example, European Patent Application EP 0 855 772 describes a process and apparatus for introducing a cable into a channel formed into a heated surface of solid ground such as asphalt, in which the apparatus displaces the material to form the channel, inserts the cable and then reintroduces the displaced material back to refill the channel. [0002]
    • SUMMARY OF THE INVENTION
  • The underlying problem consists in that in these cases the cables are installed directly in small grooves, normally not deep enough and with the cable tightly connected with the street surface, and thus not enough protected from external effects (mechanical, traffic and temperature) which will impact on the groove cable directly. For example, the groove cable may suffer from strong temperate fluctuation on the street surface, which could cause the cable to exceed its maximal elongation margin. A proposed solution for this problem is found in French [0003] Patent Application FR 2 750 717 where a thermal protection layer in the form of a tape may be placed over the cable, between the cable and the refilling material. But here the tape layer only protects the cable from the top, leaving the side walls of the groove, which may be in contact with the cable, without protection. Also, the tape layer may not oppose enough resistance to maintain the cable or itself fixed to the bottom of the groove before and after installation.
  • Furthermore, groove cable structures are not cleanly marked for later discovery and thus exposed to damaged provoked by other civil work on the streets or, in case of cable repair work, this would lead to a very time consuming process because the area has to be carefully excavated. [0004]
  • Starting from the above-mentioned French Patent Application, the present invention therefore proposes a protection element in the form of a three-walled casing which is to be installed over the conduit or cable before sealing the groove, in order to solve the problems described above. [0005]
  • The protection element serves, for example, as an isolation layer between the groove cable or conduit and the filling compound and the groove walls, which allows the groove cable to achieve positive static conditions, i.e. free stretching conditions. A protection element with the characteristics according to the present invention can compensate the mechanical effects on the groove cables, caused on the streets and from the traffic. [0006]
  • It is also an object of the protection element to fix the cable or conduit to the bottom of the groove before sealing and avoid the cable or conduit from heaving out of the groove due to temperature fluctuation during and after the installation of the cable. [0007]
  • Still another object of the protection element is to serve as detective wire so that the groove can be easily identified. [0008]
  • The object is achieved according to the invention by a protection element according to [0009] claim 1, a method for laying cables or conduits in a groove system according to claim 5 and a cable layout wherein one or more cable or conduits are fitted in grooves according to claim 6.
    •  BRIEF DESCRIPTION OF THE DRAWINGS
  • Advantageous constructions and solutions are represented in the following figures and illustrated in detail in the description. [0010]
  • An embodiment example of the invention is now explained with the aid of FIGS. [0011] 1 to 2.
  • FIGS. 1A,B shows a protection element in the form of a three-walled casing according to the invention. [0012]
  • FIGS. 2A,B shows another possible embodiment for the protection element in the form of a three-walled casing with a different design compared with FIG. 1.[0013]
    • DETAILED DESCRIPTION OF THE DRAWINGS
  • FIG. 1A shows a [0014] groove 2 formed into solid ground 1, the groove comprising a cable or conduit 5, a protection element 4 in the form of a three-walled casing and a refilling compound layer 3 over the protection element 4.
  • The [0015] protection element 4 shown in FIG. 1B has the form of a casing, which comprises a top 4 a and two side walls 4 b,4 c, and has three projections 4 d sticking out to the outside O in the upward direction from each of the side walls 4 b,4 c.
  • For example, beginning from a normal road or [0016] pavement surface 1, a groove 2 is created using a cutting or heating device. The cable or conduit 5 with the protection element 4 housing it is fitted in the groove 2 and after that, the filling compound 3 will be poured into the groove for sealing.
  • The [0017] protection element 4 can be made of a metallic tape or steel wire net wrapped with elastic foam material, thus allowing it to be used for easy identification of the groove and for cable recovery purposes. But if no identification is needed, it can also be made of hard plastic or hard gummy material.
  • The [0018] protection element 4 is also used to fix the cable to the bottom of the groove 2 before sealing and to keep it in this position afterwards, even if temperature fluctuation occur. The projections 4 d oppose more resistance to a possible upward movement forced by the cable or conduit 5.
  • FIG. 2A shows a [0019] groove 2 formed into solid ground 1, the groove comprising a cable or conduit 5, a protection element 4′ in the form of a three-walled casing with a different design as compared with FIG. 1 and a refilling compound layer 3 over the protection element 4′.
  • The particular embodiment of the [0020] protection element 4′ shown in FIG. 2B has the form of a casing, which comprises a top 4 a and two side walls 4 b,4 c, and has at least one projection 4 e sticking out to the inside I from each of the side walls 4 b,4 c, which oppose also resistance to a possible upward movement forced by the cable or conduit 5.

Claims (6)

1. Protection element which is to be installed over a conduit or cable fitted in a groove formed into solid ground wherein it has the form of a three-walled casing with a top and two side walls.
2. Protection element according to claim 1 wherein the casing has at least two projections sticking out to the outside in the upward direction from each of the side walls.
3. Protection element according to claim 1 wherein the casing has a projection sticking out to the inside from each of the side walls in the side looking at the cable or conduit.
4. Protection element according to claim 1 wherein the casing is made out of steel wire net wrapped with elastic foam material, hard plastic, hard gummy or metal.
5. Method for laying cables or conduits in a groove system created into solid ground in which the cable or conduit is fitted first at the bottom of the groove, then a covering is laid over said cable or conduit and finally a filling compound is poured into the groove for sealing, wherein said covering is a protection element according to claim 1.
6. Cable layout, consisting of a conduit or cable system, wherein one or more cables or conduits are fitted in grooves which are located at the surface of the laying foundation, wherein the cable or conduit has a covering over it sustaining the groove filling compound, wherein said covering is a protection element according to claim 1.
US10/688,938 2002-12-18 2003-10-21 Protection element, method for laying cable in a groove system and cable layout Abandoned US20040120773A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02360358.2 2002-12-18
EP02360358A EP1432160B1 (en) 2002-12-18 2002-12-18 Method and system for handling data between a clock and data recovery circuit and a data processing unit in asynchronous networks

Publications (1)

Publication Number Publication Date
US20040120773A1 true US20040120773A1 (en) 2004-06-24

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US10/688,938 Abandoned US20040120773A1 (en) 2002-12-18 2003-10-21 Protection element, method for laying cable in a groove system and cable layout
US10/720,261 Expired - Fee Related US7315539B2 (en) 2002-12-18 2003-11-25 Method for handling data between a clock and data recovery circuit and a data processing unit of a telecommunications network node of an asynchronous network, as well as a bit rate adaptation circuit and a clock and data recovery system

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/720,261 Expired - Fee Related US7315539B2 (en) 2002-12-18 2003-11-25 Method for handling data between a clock and data recovery circuit and a data processing unit of a telecommunications network node of an asynchronous network, as well as a bit rate adaptation circuit and a clock and data recovery system

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US (2) US20040120773A1 (en)
EP (1) EP1432160B1 (en)
AT (1) ATE331353T1 (en)
DE (1) DE60212665T2 (en)

Cited By (1)

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US10900614B1 (en) * 2019-10-29 2021-01-26 Saudi Arabian Oil Company Apparatus, system and method for increasing friction between a cable and surrounding soil

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DE102005005326A1 (en) 2005-02-04 2006-08-10 Infineon Technologies Ag Synchronization and data recovery device for e.g. DRAM-component, has finite impulse response low pass filter using weighted values and sampled values of previous and consecutive sampled symbols to judge instantaneous symbol
WO2010082879A1 (en) * 2009-01-16 2010-07-22 Telefonaktiebolaget L M Ericsson (Publ) A method and an interconnecting node for use in an access network
US8081639B2 (en) * 2009-01-27 2011-12-20 Tellabs Operations, Inc. Method and apparatus for supporting client data transport with timing transparency
JP5531655B2 (en) * 2010-02-08 2014-06-25 富士通株式会社 Serial data receiving circuit device and serial data receiving method
CA2856027A1 (en) 2014-03-18 2015-09-18 Smartrek Technologies Inc. Mesh network system and techniques

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US2674857A (en) * 1947-10-09 1954-04-13 Neyrpic Portuguesa Ltd Reinforcement for sections of embedded conduits subject to external pressure
US3473339A (en) * 1967-12-21 1969-10-21 Teleprompter Corp Cable conduit installation
US4166710A (en) * 1978-06-26 1979-09-04 Spiridonov Viktor V Device for securing a pipeline in place
US5106422A (en) * 1991-01-18 1992-04-21 American Electric Power Service Corporation Rapid-setting flowable backfill composition and method of using
US5385430A (en) * 1993-04-23 1995-01-31 Connors; Geoff W. Pipeline ballasting device
US5642964A (en) * 1994-11-09 1997-07-01 Phillips Petroleum Company In-ground conduit system for geothermal applications
US5962809A (en) * 1997-09-26 1999-10-05 Williamette Valley Company Apparatus and method for protecting underground cables
US6399883B1 (en) * 2000-06-20 2002-06-04 Thomas E. Lhota Channel for low voltage electrical wiring

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FR2693333A1 (en) * 1992-07-03 1994-01-07 Thomson Csf Digital demultiplexer for sound transmission - has separation into slow and fast rate words each with clock and write/read circuits with recombination circuit.
GB2275852B (en) * 1993-03-05 1997-02-26 Sony Broadcast & Communication Signal synchroniser with resynchronise control
US6278718B1 (en) * 1996-08-29 2001-08-21 Excel, Inc. Distributed network synchronization system
US5956748A (en) * 1997-01-30 1999-09-21 Xilinx, Inc. Asynchronous, dual-port, RAM-based FIFO with bi-directional address synchronization
US6166963A (en) * 1998-09-17 2000-12-26 National Semiconductor Corporation Dual port memory with synchronized read and write pointers
EP1039371A1 (en) 1999-03-24 2000-09-27 Motorola, Inc. An apparatus and a method for handling data between two asynchronous units
JP3815948B2 (en) 2000-04-20 2006-08-30 シャープ株式会社 FIFO memory control circuit
GB2362777B (en) * 2000-05-25 2002-05-08 3Com Corp System for detection of asynchronous packet rates and maintenance of maximum theoretical packet rate
JP2002044084A (en) 2000-07-19 2002-02-08 Fujitsu Ltd Interface device on asynchronous transfer mode layer side interface device on physical layer side, and method for processing cell
US7123675B2 (en) * 2002-09-25 2006-10-17 Lucent Technologies Inc. Clock, data and time recovery using bit-resolved timing registers

Patent Citations (8)

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Publication number Priority date Publication date Assignee Title
US2674857A (en) * 1947-10-09 1954-04-13 Neyrpic Portuguesa Ltd Reinforcement for sections of embedded conduits subject to external pressure
US3473339A (en) * 1967-12-21 1969-10-21 Teleprompter Corp Cable conduit installation
US4166710A (en) * 1978-06-26 1979-09-04 Spiridonov Viktor V Device for securing a pipeline in place
US5106422A (en) * 1991-01-18 1992-04-21 American Electric Power Service Corporation Rapid-setting flowable backfill composition and method of using
US5385430A (en) * 1993-04-23 1995-01-31 Connors; Geoff W. Pipeline ballasting device
US5642964A (en) * 1994-11-09 1997-07-01 Phillips Petroleum Company In-ground conduit system for geothermal applications
US5962809A (en) * 1997-09-26 1999-10-05 Williamette Valley Company Apparatus and method for protecting underground cables
US6399883B1 (en) * 2000-06-20 2002-06-04 Thomas E. Lhota Channel for low voltage electrical wiring

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10900614B1 (en) * 2019-10-29 2021-01-26 Saudi Arabian Oil Company Apparatus, system and method for increasing friction between a cable and surrounding soil

Also Published As

Publication number Publication date
DE60212665D1 (en) 2006-08-03
DE60212665T2 (en) 2006-11-09
EP1432160B1 (en) 2006-06-21
US7315539B2 (en) 2008-01-01
US20040153771A1 (en) 2004-08-05
EP1432160A1 (en) 2004-06-23
ATE331353T1 (en) 2006-07-15

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AS Assignment

Owner name: ALCATEL, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LI, HONG;REEL/FRAME:014632/0490

Effective date: 20030121

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION