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WO1992010701A1 - Systeme d'adduction d'eau - Google Patents

Systeme d'adduction d'eau Download PDF

Info

Publication number
WO1992010701A1
WO1992010701A1 PCT/GB1991/002103 GB9102103W WO9210701A1 WO 1992010701 A1 WO1992010701 A1 WO 1992010701A1 GB 9102103 W GB9102103 W GB 9102103W WO 9210701 A1 WO9210701 A1 WO 9210701A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
wire rope
underground
annular gap
pulling
Prior art date
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.)
Ceased
Application number
PCT/GB1991/002103
Other languages
English (en)
Inventor
John Colin Grace
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tate Pipe Lining Processes Ltd
Original Assignee
Tate Pipe Lining Processes Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tate Pipe Lining Processes Ltd filed Critical Tate Pipe Lining Processes Ltd
Publication of WO1992010701A1 publication Critical patent/WO1992010701A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
    • F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
    • F16L1/06—Accessories therefor, e.g. anchors

Definitions

  • This invention relates to water distribution systems and in particular to the removal and replacement of underground piping, especially but not exclusively lead or galvanised piping, connecting a main water supply pipe or conduit to domestic, industrial and other premises.
  • main water supply pipe lies under the thoroughfare, nearer one side of the street than the other (although not necessarily so) and laterally-extending supply pipes, usually lead pipes, connect the main water supply pipe or conduit to each house in the street.
  • lateral lead pipes are extracted and replaced either by "trenching”, i.e. digging down to expose same and cutting same out and replacing by plastic pipes, or by "moling” i.e. using percussive moles to bore alongside the existing lateral lead pipes while dragging in replacement plastic pipes, or by a combination of both "trenching” and "moling".
  • Percussive moles in addition to being expensive pieces of equipment, can be erratic and consequently may track off the desired path and either surface where they are not wanted (upward tracking) with consequent thoroughfare damage, or travel underground downwardly and/or laterally off the desired path which requires cessation of the replacement operation until they are found and dug out.
  • “Moling” is thus a comparatively expensive operation and can involve time-consuming and expensive downtime and surface damage repair and also damage to the other underground services.
  • underground pipe is rendered suitable for extraction by pulling and/or pushing by threading an elongate support or carrier through the length of an underground pipe leaving an annular gap therebetween, filling the annular gap with a settable fluent bonding medium, and permitting the latter to set or cure to bind the pipe and the elongate support or carrier together to form an integrated assembly for removal from underground by pulling and/or pushing.
  • the integrated assembly of underground pipe, elongate support or carrier and bonding medium can be pulled out of the surrounding earth strata.
  • the elongate support or carrier is preferably a wire rope.
  • the bonding medium is preferably a cementitious material, i.e. a grout but may, inter alia, be a settable resinous material.
  • the underground pipe is replaced by a fresh pipe by coupling or clamping the latter to the end of the underground pipe remote from the end of the latter to which the pulling action is applied whereby the fresh pipe is pulled into the earth strata trailing the aforesaid integrated assembly during its extraction to replace the lead pipe.
  • the coupling joining the underground pipe to the fresh pipe is of such a configuration, preferably conical, that the hole or passage occupied by the underground pipe is upsized as the underground pipe is extracted to facilitate entry of the fresh pipe.
  • the pulling action may, inter alia, be effected by a hollow or other fluid-operated ram with which is preferably associated a chopping device to cut the extracted integrated assembly into pieces of manageable lengths, or to strip the pipe and bonding medium off the wire rope whereby the latter can be used again.
  • the pulling action is by means of a winch preferably having a tapered drum with a fixed end plate and a removable end plate, the aforesaid integrated assembly being wound on the tapered drum and, at the end of the extraction operation, easily removed from the tapered drum by removal of the end plate so that the coiled integrated assembly can be simply slid off the tapered drum.
  • the wire rope is preferably of cored multi-strand configuration and preferably has an outside diameter as close to the internal diameter of the lead pipe as is possible commensurate with the provision of the annular gap for receiving the settable bonding medium.
  • the wire rope is preferably spun through the lead pipe against a counterflow of water which facilitates wire rope insertion while also preparing the lead pipe for receiving the settable resin.
  • Air may be blown through the annular gap prior to insertion of the settable bonding medium to remove debris therefrom.
  • wire rope used herein and in the claims includes any flexible element which is structurally and/or functionally equivalent to wire rope per se, chain for example.
  • the settable bonding medium is preferably a cementitious material but may, inter alia, be an expanding two part fast cure polymer material (resin and hardener).
  • Fig. 1 is a diagrammatic view of a typical water distribution system
  • Fig. 2 is a diagrammatic view of stage I of the pipe extraction and replacement method of the present invention
  • Figs. 3 and 4 are respectively a perspective view and a detail view of a spinner machine employed in the present invention.
  • Fig. 5 is a perspective view of a water supply arrangement as employed in the present invention.
  • Fig. 6 is a diagrammatic view of stage II
  • Fig. 7 is a sectional view of a bonding medium insertion arrangement for use in the present invention.
  • Fig. 8 is a sectional view of an alternative bonding medium insertion arrangement
  • Fig. 9 is a sectional view of the integrated assembly of lead pipe, wire rope and binding resin or grout;
  • Fig. 10 is a diagrammatic view of stage HE
  • Fig. 11 is a diagrammatic view of stage IV
  • Figs. 12 and 13 are diagrammatic views of an alternative stage IV.
  • the water distribution system comprises a main water supply pipe or conduit 20 extending underground along a street closer to one side than the other with underground lateral lead pipes 21 extending laterally therefrom to house inflow pipes 22 via control cocks 23.
  • An object of the present invention is to remove these lateral lead pipes 21 and replace them with plastic pipes.
  • the right hand lead pipes 21 due to their relatively short lengths may be replaced by the aforementioned "trenching" method but may, if required or desired, be replaced by the method according to the present invention used to replace the left hand lead pipes 21.
  • the main water supply pipe or conduit 20 is exposed by excavation as indicated at 24 and similarly the control cock region of the left hand lead pipe 21 is exposed by excavation 25.
  • the lead pipe 21 is severed from the main supply conduit 20 (length X for example) and from the control cock 23 (length Y for example) and (see Fig. 2) a water supply 26 is connected to the severed end of the lead pipe 21 at the control cock end to provide a small flow of water along the lead pipe 21 towards the excavation 24.
  • a wire rope 27 of cored helical multi-strand configuration as shown is fed from a coiled supply 28 by a power driven, preferably air powered, spinner machine 29 into and through the lead pipe 21 from excavation 24 to excavation 25 until the length of wire rope 27 projects beyond the severed end of the lead pipe 21 in the excavation 25.
  • the wire rope 27 is severed at the spinner machine 29 end with a length thereof also exposed outside the lead pipe 21.
  • the spinner machine 29 comprises a basket drum 30 containing the wire rope 27 is rotated by an air motor 31 about a central axis.
  • the wire rope 27 passes from the central area of the basket drum 30 into and through a swan neck pipe 32 emerging therefrom at the central axis at the front of the spinner machine 29 where it passes through an assembly of three rollers 33A, 33B and 33C whereof their axis are parallel to the axis of the wire rope 27, the rollers being spaced 120° apart from each other.
  • These rollers 33A, 33B and 33C are loaded by spring loading units as indicated at 34 into contact with the rotating wire rope 27 (see arrow A), spring tension being adjustable as indicated by adjustment levers 35.
  • the rollers 33A, 33B and 33C can be angled synchronously about the rotating wire rope 27 and, due to being pressured against the latter, drive the rotating wire rope 27 forwardly.
  • the rotating wire rope 27 can be driven forwards (see arrow B) or in reverse. The more acute the angling the greater the linear speed of the rotating wire rope 27.
  • the spinner machine 29 has a support frame 36.
  • the above-described spinner machine 29 is of known construction to those skilled in the art of wire rope handling and no claim is made to same per se.
  • Any other convenient mechanism for driving the wire rope 27 through the pipe 21 with or without spinning of the wire rope 27 may be employed in the present invention.
  • the outside diameter of the wire rope 27 is as large as is possible commensurate with its spinning passage along the lead pipe 21 and the provision of an annular gap or space 37 between the wire rope 27 and the inner wall surface of the lead pipe 21.
  • the back-flushing (water supply) arrangement 26 (see Fig. 5) is a dual purpose unit which is fitted on to the pipe 21 at the severed end in excavation 25.
  • a tool 38 with a pointed end 39 is hammered into the end of the pipe 27 to splay the end (see 27A), the end of the pipe 27 being enclosed in a sleeve 40.
  • the splayed end 27A is then trapped between a centrally-bored, quick-fit connector 41 and the sleeve 40, the splayed end 27A sealing on the conical end 42 of the connector 41 which is screw-threaded to the sleeve 40 at 43.
  • a water supply pipe 44 is connected to the connector 41 to feed water along the pipe 21 and the annular gap 37 formed as the rotating wire rope 27 is driven along the pipe 21.
  • the flow of water along the lead pipe 21 during the spinning input of the wire rope 27 not only assists passage of the wire rope 27 along the lead pipe 21 but also serves to prepare the inner surface of the lead pipe 21 for the next stage of the method according to the present invention which is the insertion of a settable resin or grout into the annular space or gap 37 between the wire rope 27 and the lead pipe 21.
  • the water supply pipe 44 may be disconnected and an air hose fitted to blow compressed air along the annular gap 37 to remove any debris contained therein.
  • the compressed air will also blow out any flushing water contained or remaining within the annular gap 37.
  • the settable bonding material employed may either be a cementitious material, i.e. a grout, or a settable resinous material.
  • the settable resin employed may be an expanding two-part fast cure polymer material comprising a resin and a hardener which, for example, is delivered in known manner in precise predetermined volumes in what is known as a "pail".
  • the resin and hardener are contained within their individual receptacles, the hardener and resin being brought together prior to use and vigorously mixed either manually or by power means for example an air driven paddle arrangement.
  • the "pail” is indicated at 44 in Fig. 6. It is open topped and a delivery pipe 45 extends therefrom to the annular gap 37 between the wire rope 27 and the lead pipe 21.
  • the pail 44 is contained within a pressure pot 46 into which is connected an air compressor 47 by a pipe 48.
  • the resin 49 is delivered (see Fig. 7) into a sleeve 51 surrounding the lead pipe 21 and the inserted wire rope 27 (no longer spinning), a seal 52 being fitted between the sleeve 51 and the wire rope 27 and a seal 53 being fitted between the sleeve 51 and the lead pipe 27.
  • the lead pipe 21 is fitted with a sleeve 40A and connector 41A similar to those illustrated in Fig. 5 and grout 49A is delivered through the connector 41A by a syringe or reciprocating pump 50 into the annular gap 37 between the lead pipe 21 and the wire rope 27.
  • the resin or grout 38 is formulated to provide a bonding medium of just the correct viscosity to allow free flow into and along the annular gap 37 but not too thin so as to tend to simply run away.
  • the water/compressed air delivery system (see Fig. 5) and the bonding resin delivery system (see Figs. 6 and 7 or Fig. 8) being disconnected the grout 38 is allowed to cure or set.
  • internal wire rope 27 and intervening binding grout 49 filling annular space 37 forms an integrated mass.
  • the integration will be assisted by the configuration of the wire rope 27 and also the irregularities in the internal surface of the lead pipe 21 which result from long usage of the latter or the passage of the wire rope 27 therealong.
  • the lead pipe 21 integrated with the wire rope 27 by the binding grout 49 can simply be extracted by the means such as is described hereinafter for example with reference to Fig. 10 or Figs. 11 and 12.
  • the primary purpose of this invention is to replace the extracted lead pipe by fresh pipe preferably plastic pipe as is described hereinafter with reference to Figs. 10 and 11 or Figs. 10, 12 and 13.
  • Fig. 10 The next stage of the pipe replacement method according to the present invention is illustrated in Fig. 10 and in this Figure the lead pipe 21 is viewed at the control cock end i.e. the end in excavation 25.
  • a replacement plastic pipe 54 which will be fed off a coil or reel (not shown).
  • FIG. 10 there is shown a lead pipe/plastic pipe jointing member 55 having a male spigot 56 over which the plastic pipe 54 fits.
  • An external clamping collar 57 is secured around the plastic pipe 54 and spigot 56.
  • the jointing member 55 is then spiggoted into the end of the integrated lead pipe/wire rope/grout assembly 27,21,49 as indicated at 56A and connection is effected by a clamping ring 58.
  • the jointing member 55 is tapered, as shown to facilitate its passage along the lead pipe path and to increase the size of the hole within which the lead pipe lies to facilitate passage of the plastic pipe 54 therethrough.
  • FIG. 11 of the drawings there is shown excavation 24 within which is disposed a mounting frame 59 which mounts a hollow fluid operated pulling ram 60 which grips the exposed end of the integrated assembly 21, 49, 27 by means of a collet clamp 61 for example and serves to pull the integrated assembly out of the earth strata into the excavation 24.
  • the hollow ram bore is large enough to accommodate any sweated joints in the lead pipe 21.
  • Downstream of the pulling ram 60 is a hydraulic chopper or cutting device 62 or a device for stripping the lead pipe 27 and grout 49 from the wire rope 27.
  • clamp may be, for example, a V-notch clamp.
  • the plastic pipe 54 is, at its other end, cut off its supply reel (not shown) and connected to the control cock 23. Alternatively, a predetermined discrete length of plastic pipe 54 may have been provided for insertion.
  • FIG. 12 An alternative pulling arrangement is shown in Figs. 12 and 13.
  • a mounting frame 63 disposed in excavation 24 which mounting frame supports a winch 64 driven by a convenient motor 44.
  • the winch 64 preferably has a tapered drum 65 with a fixed end plate 66 and a removable end plate 67 the drum tapering towards the removable end plate 67 and being notched as indicated at 68 at its smallest diameter end.
  • a free end of the wire rope 27 of the integrated assembly is engaged in the notch 68 and the plate 67 is releasably secured in position on the drum 65.
  • the winch 64 is then driven to coil the integrated assembly 21, 49, 27 onto the drum 65 until once again the plastic pipe 54 is exposed in excavation 24. Thereafter the plastic pipe 54 is connected at opposite ends to the main supply pipe or conduit 20 and the control cock 23.
  • the end plate 67 is removed from the winch drum 65 and the coiled integrated assembly can easily be slid off the drum 65 for removal and disposal.
  • the delivery pipe 50 may be connected to the annular gap 37 via a blow-down/grouting collar which is preferably disposable in nature.
  • the water supply installation may not, in fact, be provided with the control cocks 23, the new plastic piping 54 being appropriately connected to the inflow pipes 22.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)

Abstract

On enlève un tuyau souterrain (21) en y faisant passer un câble métallique (27) avec ou sans un mouvement de rotation, en faisant adhérer le tuyau et le câble métallique par l'intermédiaire d'un milieu d'adhérence durcissable (49) introduit dans la fente annulaire (87) entre le tuyau et le câble de façon à ce qu'ils forment un ensemble solidaire, et en enlevant l'ensemble solidaire en tirant ou en poussant ledit ensemble hors des couches de terre. Le tuyau enlevé peut être remplacé par un nouveau tuyau lorsqu'on accouple celui-ci à l'extrémité arrière de l'ensemble solidaire. L'application préférée se rapporte au remplacement de tuyaux souterrains en plomb ou galvanisés par des tuyax en plastique.
PCT/GB1991/002103 1990-12-05 1991-11-27 Systeme d'adduction d'eau Ceased WO1992010701A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909026450A GB9026450D0 (en) 1990-12-05 1990-12-05 Water distribution systems
GB9026450.8 1990-12-05

Publications (1)

Publication Number Publication Date
WO1992010701A1 true WO1992010701A1 (fr) 1992-06-25

Family

ID=10686524

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/002103 Ceased WO1992010701A1 (fr) 1990-12-05 1991-11-27 Systeme d'adduction d'eau

Country Status (3)

Country Link
AU (1) AU9043191A (fr)
GB (1) GB9026450D0 (fr)
WO (1) WO1992010701A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2696227A1 (fr) * 1992-09-25 1994-04-01 Sade Travaux Hydraulique Dispositif et procédé pour extraire du terrain sans le casser un branchement d'adduction d'eau en plomb et le remplacer dans le même temps par un branchement en matière plastique.
US5653554A (en) * 1993-11-13 1997-08-05 North West Water Group Plc Apparatus for removing piping from the ground
EP1092901A3 (fr) * 1999-10-13 2003-04-02 M.P. Burke plc Méthode pour enlever et/ou remplacer une tuyauterie enterrée
WO2012140410A3 (fr) * 2011-04-12 2013-01-03 Kobus Services Limited Appareil et élément perfectionnés pour enlever des tubes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297164A (en) * 1941-07-01 1942-09-29 Daniel L Roberts Jr Pipe replacing apparatus
US4637756A (en) * 1985-01-23 1987-01-20 Boles Flounoy W Apparatus for removing and replacing pipe beneath an earthfill
DE3912728C1 (fr) * 1989-04-15 1989-11-02 Gustav Gildemeister Gmbh, 1000 Berlin, De

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297164A (en) * 1941-07-01 1942-09-29 Daniel L Roberts Jr Pipe replacing apparatus
US4637756A (en) * 1985-01-23 1987-01-20 Boles Flounoy W Apparatus for removing and replacing pipe beneath an earthfill
DE3912728C1 (fr) * 1989-04-15 1989-11-02 Gustav Gildemeister Gmbh, 1000 Berlin, De

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2696227A1 (fr) * 1992-09-25 1994-04-01 Sade Travaux Hydraulique Dispositif et procédé pour extraire du terrain sans le casser un branchement d'adduction d'eau en plomb et le remplacer dans le même temps par un branchement en matière plastique.
BE1007542A3 (fr) * 1992-09-25 1995-08-01 Sade Compagnie Generale De Tra Dispositif et procede pour extraire du terrain sans le casser un branchement d'adduction d'eau en plomb et le remplacer dans le meme temps par un branchement en matiere plastique.
ES2087012A2 (es) * 1992-09-25 1996-07-01 Sade Compagnie Generale De Tra Dispositivo y procedimiento para extraer del terreno sin romperla una acometida de conduccion de agua de plomo y sustituirla al mismo tiempo, por una acometida de materia plastica.
US5653554A (en) * 1993-11-13 1997-08-05 North West Water Group Plc Apparatus for removing piping from the ground
EP1092901A3 (fr) * 1999-10-13 2003-04-02 M.P. Burke plc Méthode pour enlever et/ou remplacer une tuyauterie enterrée
WO2012140410A3 (fr) * 2011-04-12 2013-01-03 Kobus Services Limited Appareil et élément perfectionnés pour enlever des tubes

Also Published As

Publication number Publication date
GB9026450D0 (en) 1991-01-23
AU9043191A (en) 1992-07-08

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