WO2001086182A2 - Multi-purpose rehabilitation of conduits - Google Patents
Multi-purpose rehabilitation of conduits Download PDFInfo
- Publication number
- WO2001086182A2 WO2001086182A2 PCT/US2001/015154 US0115154W WO0186182A2 WO 2001086182 A2 WO2001086182 A2 WO 2001086182A2 US 0115154 W US0115154 W US 0115154W WO 0186182 A2 WO0186182 A2 WO 0186182A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conduit
- conduits
- new
- diameter
- tunnel
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
- E03F5/022—Partitioned to allow more than one medium to flow through
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1658—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the old pipe being ruptured prior to insertion of a new pipe
Definitions
- This invention generally relates to the rehabilitation and improvement of utility conduits, including sewer, water, electrical, natural gas, telephone, telecommunication and similar systems. More particularly, the invention relates to the rehabilitation of conduits such that they may serve their originally intended uses while adding new functionality to the conduits .
- a parallel, yet separate, industry which is concerned with telecommunications cable, including high speed fiber optic lines for computer or cable television, and various other uses, is similarly expanding its capacity and reach.
- this industry is creating new infrastructure, rather than rehabilitating existing lines.
- the costs involved in expanding telecommunications networks are prohibitive and, unlike water systems, may be indefinitely postponed if costs are excessive. This problem is particularly acute in lower density population areas where the returns on investment in expensive telecommunications lines may be much lower than in more populous areas.
- Patent 353,680 to Hurlbut discloses replacement pipes which have multiple chambers for carrying different media.
- the "dig and replace” method is extremely expensive, slow and unnecessarily disturbs the ground surface above the entire length of the conduits.
- a improvement over this method essentially comprises digging an access trench or entering manholes at both ends of an old conduit and feeding a new conduit through the length of the old conduit so that the existing conduit is left as a casing around the new conduit.
- the present invention provides a method for rehabilitating a conduit which comprises bursting a first conduit to create a tunnel, and inserting a plurality of new conduits into the tunnel, such that at least one of the new conduits has a capacity equal to or greater than a capacity of the first conduit .
- the invention further provides a method wherein the new conduits are inserted simultaneously and are either separate from or removeably connected to one another, such that the new conduits are capable of being diverted from the tunnel at separate 1ocations .
- a method for rehabilitating a conduit which comprises bursting a first conduit to create a tunnel, and inserting a new conduit into the tunnel, the new conduit comprising a plurality of channels, such that at least one of the channels has a capacity equal to or greater than a capacity of the first conduit .
- the invention provides methods for simultaneously inserting multiple conduits for various uses into an existing conduit.
- the invention further provides methods and related apparatuses for bursting existing conduits to create tunnels, installing new conduits into the tunnels and diverting the new conduits or conduit channels from one another such that they can be directed to different locations .
- the invention further provides a junction between two multi channel conduits and a multi channel conduit with an outer annular region which is particularly suitable for drilling such that a central bore may thereby be accessed.
- FIG. 1 is a perspective view of a preferred embodiment of the invention showing a multiple conduit arrangement .
- FIG. 2 (a) and 2(b) are perspective views of other preferred embodiments of the invention showing a single conduit with multiple channel arrangements .
- FIG. 3 is a perspective view showing a preferred arrangement which may be used to perform a bursting/conduit replacement method of the invention.
- FIG. 4 is a perspective view showing a close up view of another preferred arrangement which may be used to perform a bursting/conduit replacement method of the invention.
- FIG. 5 is a perspective view of a preferred alignment collar of the invention.
- FIG. 6 is a left side view of a preferred bursting head of the invention.
- FIG. 7 is a cross sectional view of the bursting head shown in Fig. 6, taken along line 7-7.
- Fig. 8 is a perspective view of a preferred arrangement of the multiple conduit system of the invention after installation.
- Fig. 9(a) is a perspective view of an adapter which may be used with multi channel conduits, taken along the lines A- A, B-B and C-C in Fig. 9(a), respectively.
- Fig. 9(b), 9(c) and 9(d) are cross sectional views of an adapter which may be used with multi channel conduits .
- Fig. 10 is a perspective view of one preferred arrangement of the invention showing a junction between two multi channel conduits.
- Fig. 11 is a perspective view of another preferred arrangement of the invention showing an arrangement for connecting an end user to a multi channel conduit.
- Fig. 12 is a perspective view of another preferred arrangement of the invention showing an arrangement for connecting an end user to a multi conduit system.
- multiple conduits such as those shown in Fig. 1, are inserted into an existing conduit or a tunnel which is created by bursting or spreading the inner walls of an existing conduit outward to form a tunnel .
- Methods and apparatuses related to pipe bursting are described in U.S. Patent Nos. 4,738,565 to Streatfield et al . ; 5,054,677 to Carruthers; 4,983,071; 5,078,546; Re.35, 271; and Re.35, 542, all to Fisk et al . , all of which are incorporated herein by reference (Hereafter referred to as "pipe bursting patents”) .
- Pipe bursting entails the insertion of a device into a conduit, such as an existing water pipe, and applying pressure to the interior surface of the conduit so that it breaks apart or is spread apart after it is cut down its length.
- the medium surrounding the conduit such as soil, is simultaneously compressed by the outward force of the apparatus so that, after the operation is complete, a tunnel with an interior diameter larger than the outer diameter of the original conduit generally results.
- the walls of this tunnel are generally lined with pieces of conduit and compressed soil.
- existing conduits may be reamed before new conduits are installed. Reaming is generally defined as a process by which the inner diameter of an existing conduit is increased by cutting or grinding the inner surface of the conduit.
- bursting or "pipe bursting” refers to any method for expanding the inner diameter of an existing conduit including, but not limited to, the methods and apparatuses detailed below, those described in the aforementioned pipe bursting patents, and other methods, including reaming, which are well known by those familiar with conduit rehabilitation.
- Various pipe bursting techniques may be used to burst almost any pipe, including, but not limited to those formed of vitrified clay, reinforced concrete, cast iron, ductile iron, asbestos cement and steel .
- the advantage of these methods is that a new conduit that has an inner diameter at least as large as the original conduit may be inserted into the tunnel.
- a sewer line to a home needs to be replaced because of leaking, pipe bursting allows for the insertion of a new conduit which has equal or greater capacity to that of the original conduit.
- an 8" diameter conduit can be replaced with a 12" diameter conduit. This is important in applications where the original conduit is at maximum capacity and the use of a smaller diameter conduit is unacceptable.
- Fig. 1 shows one possible arrangement when a relatively larger diameter conduit 2, such as that which may be suitable for water or sewage is inserted into a tunnel, after pipe bursting, along with relatively smaller diameter conduits 4, 6, 8, 10, 12, 14 and 16 which may, for example, be suitable for fiber optic, electrical, coaxial or other cables.
- Conduits 4, 6, 8, 10, 12, 14 and 16 may also be used to carry fluids or gas depending on the circumstances .
- the conduits may be manufactured from a variety of materials including at least high density polyethylene, extra high molecular weight polyethylene, medium density polyethylene, polypropylene, polyvinyl chloride or similar materials. Rigid conduits, such as those formed from steel or ductile iron, can also be installed. However, most preferred embodiments utilize a flexible plastic pipe.
- Conduits intended for carrying water or sewage will preferably range in size from approximately 4" to 18", and conduits for fiber optic and other cables are preferably in the range of 1cm to 5cm. However, the invention may be used to rehabilitate conduits with a 36" diameter, or larger. Conduits are typically installed in lengths of 200' to 500' but may be installed in shorter or much longer sections depending on the type of conduit used and the existing field conditions. Conduits may be joined to one another to increase their overall length by various known methods, including butt fusion.
- pipe-bursting methods allow, if desired, at least one of the new conduits, conduit 2 as depicted in Fig. 1, to have an inner diameter, and consequential capacity, at least as large as the original conduit which is being replaced (not shown) .
- At least one of the new conduits it is beneficial for at least one of the new conduits to have a capacity substantially equal to or greater than the capacity of the existing conduit, though a conduit with a smaller capacity may suffice if its capacity is large enough to handle the media which is carried by the existing conduit, since the existing conduit may not utilize its full capacity.
- a new conduit with a smaller diameter may have an equal or even greater capacity than a larger diameter existing conduit because the new conduit may have a smaller C factor (roughness coefficient), i.e. better flow properties.
- Conduits 4-16 need not be attached, though they may be attached, to conduit 2. If they are attached it is generally preferred that they be detachable after installation so that they may be diverted to a destination (s) separate from conduit 2. Also, conduits 4-16 may have related or different purposes from one another. Thus, in one possible arrangement, conduit 2 will carry sewage away from a building, conduit 4 will house fiber optic cable and conduit 6 will house coaxial cable.. In the most preferred method the new conduits are installed without data or cables therein, as these cables can easily be blown or pulled through the conduits at a later date to meet specific needs. However, any of the conduits shown in Fig. 1 could themselves be fiber optic or other data lines, rather than hollow conduits which will house data cables at some time in the future.
- conduits 2-16 need not share a common source or destination, so long as they need to travel the same route for any distance these methods are appropriate.
- the cost of pipe bursting, if done, and insertion of replacement conduits may be shared, for example, among telecommunications, gas and electric companies and a municipal sewage department.
- Fig. 2(a) shows a similar arrangement where an inner wall 18/outer wall 20 assembly is inserted into a tunnel such that inner channel 22 is created, and has, preferably, though not necessarily, an inner diameter at least equal to the old conduit, and outer channels 24, 26 and 28 are created by baffles or compartment separators 30 and 32.
- Channels 22, 24, 26 and 28 and conduits 2-16 may contain cables, wiring or roping (which may be used to pull cables through at a later date) during installation or may remain essentially empty and available for insertion of various cables or media as the need arises .
- Fig. 2(b) is an alternate embodiment in which the outer channels are cylindrical in shape.
- Fig. 3 shows a preferred arrangement for installing a multi-conduit system.
- a reel 34 of coiled pipe 36 (4" in this example) and multiple fiber pipes 38, 39 (11mm in this example) are pulled into an access pit 40 where the pipes are attached to a bursting head 42.
- the bursting head 42 is pulled through an existing conduit 44 by a cable or rod 46, which is attached to a winch 48 at the other end of the existing conduit 44. Since the outer diameter of the bursting head 42 is larger in diameter than the existing conduit 44, the bursting head 42 breaks apart the existing conduit 44 as it moves (to the right as shown in Fig. 3) creating a tunnel whose diameter is larger than the original conduit.
- the bursting action may be enhanced by means of a hammering action that is created by the pulling head itself.
- This "hammering" action can be caused by pneumatic or hydraulic devices as explained in the aforementioned pipe bursting patents.
- the conduits 36, 38, 39 are simultaneously pulled in behind the bursting head 42 so that in one step a tunnel is created along the path of the existing conduit 44 and a multi-conduit arrangement is installed therein.
- the new conduits may be connected at one end to a house 35 and at another end to other conduits 37 running down the center of a street 41.
- the bursting head 42 may be pushed or pulled through the existing conduit by various other methods known in the industry which may or may not require a winch or similar apparatus.
- Fig. 4 is a close-up view of a similar arrangement where two lengths of 1.25" conduit 50, 51 are fed from reel 52 while a larger diameter conduit 54 is fed from a second reel (not shown) through an alignment collar 55 to a bursting head 56 with larger dimensions than that shown in Fig. 3.
- Fig. 5 is a detailed view of a preferred alignment collar 56 which may be bracketed in place in a position as shown in Fig. 4 so that, just prior to insertion within the tunnel, the larger pipe 54 can be aligned by larger guide aperture 58 and conduits 50, 51 can be aligned through any of smaller guide apertures 60.
- the invention may be practiced without the collar, but the collar is helpful for aligning new conduits in deep trenches where the new conduits are bent to a relatively large degree prior to their insertion in the tunnel .
- Fig. 6 shows a side view of a bursting head (ref . numeral 42 in Fig. 3; ref. numeral 56 in Fig. 4) .
- the bursting head may be in a variety of shapes and sizes, though it is preferred that the bursting head tip 62 be cone shaped or rounded or at least of a smaller diameter than the existing conduit so that it will easily enter into it.
- the diameter as measured along line "X" is preferably the same or slightly less than the diameter of the existing conduit in applications where the new conduits are being installed inside the existing conduit. Where, as is most preferred, the existing conduit is being bursted to create a larger tunnel, the diameter must be larger than the inner diameter of the existing conduit .
- the bursting head further includes flanges 64, 66, 68 and 70 to which the new conduits attach before the pulling procedure.
- Conduit 54 (Fig. 4) may connect to flange 64, and conduits 50, 51 (Fig. 4) may connect to any two of flanges 66, 68 and 70.
- the number of flanges surrounding flange 64 may vary depending upon the application.
- Fig. 7 is a cross section along line A-A (Fig. 6) of the bursting head.
- flange 64 fits inside of an end of conduit 54 and is removeably affixed thereto with fastening devices 72, such as bolts, screws or pins, during the pulling process.
- fastening devices 72 such as bolts, screws or pins
- flanges 66 and 70 fit inside ends of conduits 50 and 51, respectively, and are removeably affixed thereto with fastening devices 74 during the pulling process.
- Other embodiments may include flanges which attach to the outside of the conduits by surrounding a portion of the conduit outer surface.
- conduits are attached to the bursting head, so long as the conduits may readily be attached at one manhole or access trench and detached at another after being pulled through the tunnel.
- the flanges may be removeably connected to a variety of conduits including, but not limited to, those shown in Figs. 2(a) and 2(b), which, in a preferred method, would be connected to flange 64.
- Fig. 8 is a perspective view of a preferred arrangement of the multiple conduit system of the invention after installation.
- Fig. 8 shows one preferred arrangement whereby the conduit 54 runs directly to, and is accessible from, the sewer manhole 76. While conduits 50 and 51 diverge from conduit 54 and lead to a telecommunications manhole 78. Notably, conduit 54 does not enter the telecommunications manhole 78 and conduits 50 and 51 do not enter the sewer manhole 76. Thus, even though all conduits are installed together for the majority of their lengths, they diverge from one another so that maintenance may be conducted independently on each system. In other embodiments, conduits 50 and 51 may enter the sewer manhole, if desired. As shown in Fig. 8 the sewer pipe 54 does not continue through the manhole but, instead, ends at one end of the manhole and continues at the other. This is generally the case, but the arrangement may vary.
- Fig. 9(a) is a perspective view of an adapter which may be used with the multi channel conduits shown in figures 2 (a) and 2 (b) so as to achieve a diversion of the smaller channels in a similar manner to that shown in Fig. 8.
- the adapter redirects channels 80, 82, 84, 86 and 88 from a position on the outer circumference of channel 90 (line A-A) to a position at one circumferential point of channel 90 (line C- C) , where channels 80-88 can be further diverted as a group or independently to different destinations.
- the total length of the adapter (from lines A-A to C-C) may be approximately 10 feet.
- Figs. 9(b), 9(c) and 9 (d) are cross sectional views of the adapter through lines A-A, B-B and C-C, respectively.
- Fig. 10 shows a preferred method of connecting a smaller multi channel conduit to a larger multi channel conduit so that, for instance, a home may gain access to a combination water main/telecommunications conduit arrangement.
- a smaller pipe 92 may be branched off from a main conduit 94 in such a manner that an outer chamber 96 of conduit 92 is in communication with an outer chamber 98 of conduit 94.
- inner channel 100 of conduit 92 is in communication with inner channel 102 of conduit 94.
- channels 100 and 102 could carry water or sewage and channels 96 and 98 could carry fiber optic cable.
- a similar arrangement could be placed in channel 104 for, as an example, a house across the street from the house connected by conduit 92.
- Fig. 11 shows another arrangement wherein channels 108 and 110 of conduit 106 are comprised of a solid material, such as plastic, which may be easily drilled or tapped by a tap 112 so that conduit 118 is in communication with channel 120 and gas or steam may be directed to an end user.
- another conduit 114 may be attached to conduit 106 such that channel 116 is in communication with channel 122 and fiber optic cables may be run to the end user.
- Fig. 12 shows another arrangement wherein channels 124 and 126 are in communication with conduit 128; conduits 130 and 132 are in communication with conduit 134 and conduits 136 and 138 are in communication with conduit 140.
- conduits 128, 134, 140 and 142 may be main lines running down a street while conduits 124, 130 and 136 may run to a house on the street and conduits 126, 132 and 138 may run to a second house on the street .
- Conduit 142 may be connected to conduits running to another house (not shown) or may be installed with conduit 128, 134 and 140 and left for possible use in the future.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60133640T DE60133640D1 (en) | 2000-05-10 | 2001-05-10 | MULTILURPACING OF CABLES |
MXPA02011082A MXPA02011082A (en) | 2000-05-10 | 2001-05-10 | Multi-purpose rehabilitation of conduits. |
EP01935290A EP1287212B1 (en) | 2000-05-10 | 2001-05-10 | Multi-purpose rehabilitation of conduits |
CA002408388A CA2408388C (en) | 2000-05-10 | 2001-05-10 | Multi-purpose rehabilitation of conduits |
AU2001261398A AU2001261398A1 (en) | 2000-05-10 | 2001-05-10 | Multi-purpose rehabilitation of conduits |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20345200P | 2000-05-10 | 2000-05-10 | |
US60/203,452 | 2000-05-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001086182A2 true WO2001086182A2 (en) | 2001-11-15 |
WO2001086182A3 WO2001086182A3 (en) | 2002-04-11 |
Family
ID=22754074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/015154 WO2001086182A2 (en) | 2000-05-10 | 2001-05-10 | Multi-purpose rehabilitation of conduits |
Country Status (8)
Country | Link |
---|---|
US (1) | US6702520B2 (en) |
EP (1) | EP1287212B1 (en) |
AT (1) | ATE392581T1 (en) |
AU (1) | AU2001261398A1 (en) |
CA (1) | CA2408388C (en) |
DE (1) | DE60133640D1 (en) |
MX (1) | MXPA02011082A (en) |
WO (1) | WO2001086182A2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002087045A1 (en) * | 2001-04-24 | 2002-10-31 | Michael Henze | No-dig method for establishing and operating an underground telecommunications (fixed) network that follows the route of existing waste-water networks |
DE102005006240B4 (en) * | 2004-02-11 | 2008-05-29 | Rogall, Armin D., Prof. Dipl.-Ing. | Infrastructure empty pipe system |
WO2013190183A1 (en) * | 2012-06-21 | 2013-12-27 | Oy Kwh Pipe Ab | Weighted pipe assembly and a method of weighting collector pipes |
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EP1356224B1 (en) * | 2001-01-30 | 2007-03-28 | Stadtwerke Schwerte GmbH | Bundle of pipes and method for parallel arrangement of pipes according to a bore and swivel method |
EP1363150A1 (en) * | 2002-05-13 | 2003-11-19 | Alcatel | Process of laying cables and information network and operation of information network |
EP1533879A1 (en) * | 2003-11-18 | 2005-05-25 | Alcatel | Cable system and method for laying cable |
US6979776B1 (en) * | 2004-10-14 | 2005-12-27 | Entergy Louisiana, Inc. | Pipe bundle for underground installation |
US20070048090A1 (en) * | 2005-08-31 | 2007-03-01 | Wentworth Steven W | Method and apparatus for installation of underground ducts |
US9829143B2 (en) | 2015-05-14 | 2017-11-28 | Edward Alan Ambler | Compositions and methods for in-situ macro-encapsulation treatment of friable asbestos fibers generated by trenchless pipe bursting of asbestos cement pipe |
US10243332B1 (en) * | 2017-09-05 | 2019-03-26 | Electric Power Research Institute, Inc. | Method of replacing pipe-type power cables with extruded-dielectric cables |
US10969053B2 (en) * | 2017-09-08 | 2021-04-06 | The Charles Machine Works, Inc. | Lead pipe spudding prior to extraction or remediation |
US10407862B1 (en) * | 2018-06-28 | 2019-09-10 | Grant M. Rohlmeier | Subterranean fluid transport system and method of installation |
US11242944B1 (en) * | 2020-07-22 | 2022-02-08 | Trinity Bay Equipment Holdings, LLC | Mid-pipe pulling device systems and methods |
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2001
- 2001-05-10 DE DE60133640T patent/DE60133640D1/en not_active Expired - Lifetime
- 2001-05-10 AU AU2001261398A patent/AU2001261398A1/en not_active Abandoned
- 2001-05-10 CA CA002408388A patent/CA2408388C/en not_active Expired - Fee Related
- 2001-05-10 MX MXPA02011082A patent/MXPA02011082A/en active IP Right Grant
- 2001-05-10 EP EP01935290A patent/EP1287212B1/en not_active Expired - Lifetime
- 2001-05-10 US US09/852,608 patent/US6702520B2/en not_active Expired - Fee Related
- 2001-05-10 AT AT01935290T patent/ATE392581T1/en not_active IP Right Cessation
- 2001-05-10 WO PCT/US2001/015154 patent/WO2001086182A2/en active Application Filing
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WO2002087045A1 (en) * | 2001-04-24 | 2002-10-31 | Michael Henze | No-dig method for establishing and operating an underground telecommunications (fixed) network that follows the route of existing waste-water networks |
DE102005006240B4 (en) * | 2004-02-11 | 2008-05-29 | Rogall, Armin D., Prof. Dipl.-Ing. | Infrastructure empty pipe system |
WO2013190183A1 (en) * | 2012-06-21 | 2013-12-27 | Oy Kwh Pipe Ab | Weighted pipe assembly and a method of weighting collector pipes |
Also Published As
Publication number | Publication date |
---|---|
WO2001086182A3 (en) | 2002-04-11 |
CA2408388C (en) | 2007-04-17 |
ATE392581T1 (en) | 2008-05-15 |
EP1287212A2 (en) | 2003-03-05 |
US6702520B2 (en) | 2004-03-09 |
EP1287212B1 (en) | 2008-04-16 |
US20020044837A1 (en) | 2002-04-18 |
CA2408388A1 (en) | 2001-11-15 |
EP1287212A4 (en) | 2004-07-21 |
DE60133640D1 (en) | 2008-05-29 |
MXPA02011082A (en) | 2004-08-19 |
AU2001261398A1 (en) | 2001-11-20 |
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