WO2003031737A1 - Sewer maintenance shaft and pipe connector - Google Patents

Sewer maintenance shaft and pipe connector Download PDF

Info

Publication number
WO2003031737A1
WO2003031737A1 PCT/AU2002/001371 AU0201371W WO03031737A1 WO 2003031737 A1 WO2003031737 A1 WO 2003031737A1 AU 0201371 W AU0201371 W AU 0201371W WO 03031737 A1 WO03031737 A1 WO 03031737A1
Authority
WO
WIPO (PCT)
Prior art keywords
liner
pipe
maintenance shaft
sewer maintenance
sewer
Prior art date
Application number
PCT/AU2002/001371
Other languages
French (fr)
Inventor
Shane John Wormall
Original Assignee
Blueport Nominees Pty 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 Blueport Nominees Pty Ltd filed Critical Blueport Nominees Pty Ltd
Publication of WO2003031737A1 publication Critical patent/WO2003031737A1/en

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
    • E03F5/025—Manhole shafts or other inspection chambers; Snow-filling openings; accessories provided with a liner
    • 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
    • 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
    • E03F5/021—Connection of sewer pipes to manhole shaft

Definitions

  • the present invention relates to a sewer maintenance shaft and pipe connector suitable for use underground to provide access to sewer pipes and to connect sewer pipes together.
  • sewer pipes are deep underground, some in the vicinity of 12 metres or so. At that depth, ground water and soil weight apply a great deal of pressure to the pipes and sewer maintenance shafts.
  • the sewer maintenance shaft must therefore be able to withstand the high pressures at these depths.
  • Sewer maintenance shafts are often used as a point to join sewer pipes. It is desirable to have flexibility in joining pipes at different angles.
  • the concrete of the human access chambers is susceptible to corrosion from the contents of the sewer pipes and therefore the maintenance shafts are generally constructed of plastics material. There is currently no simple trade off between ability to withstand pressure/weight and corrosion resistance because existing plastic maintenance shafts can be crushed by the pressures involved.
  • a sewer maintenance shaft and pipe connector including: a liner having at least one inlet pipe coupled thereto and an outlet pipe coupled to the liner; a riser tube extending upwardly from the liner; a reinforcing body cast around the liner; and a sealing means cast in the reinforcing body around each pipe.
  • the liner is spherical in shape with the outlet pipe coupled to the bottom most part of the liner.
  • the reinforcing body is cast of concrete.
  • the sealing means includes a flange extending from each pipe.
  • the sealing means includes a concrete bonding agent on an exterior surface portion of each pipe for bonding with the concrete body.
  • the bonding agent is sand glued to the pipe.
  • the sealing means includes a rubber ring extending around the pipe.
  • Preferably another sealing means is cast in the concrete body around the riser tube.
  • a sewer maintenance shaft and pipe connector including: a liner having at least one inlet pipe coupled thereto and an outlet pipe coupled thereto; a riser tube extending upwardly from the liner; and a reinforcing casing bonded to the liner and/or the pipes.
  • the liner is spherical in shape with the outlet pipe coupled to the bottom most part of the lines.
  • the reinforcing casing is sealingly bonded to the liner and the pipes.
  • the reinforcing casing is in the form of fibre glass.
  • Figure 1 is a schematic side elevation of a sewer maintenance shaft and pipe connector in accordance with the present invention
  • Figure 2 is a schematic plan view of the sewer maintenance shaft and pipe connector of Figure 1 ;
  • Figure 3 is an enlarged view of inset A of Figure 1;
  • Figure 4 is an enlargement of a sealing means between a liner and casing of the sewer maintenance shaft and pipe connector of Figure 1;
  • Figure 5 is a schematic side elevation view of an alternative sewer maintenance shaft and pipe connector according to the present invention.
  • FIG. 6 is an enlargement showing the casing of the sewer maintenance shaft and pipe connector of Figure 5.
  • a sewer maintenance shaft and pipe connector 10 which includes a liner 12 encased in a reinforced casing in the form of a concrete body 14.
  • the liner is fabricated first as two hemispheres 16 and 18 each having a circumferential flange 20 and 22 that mate to form the spherical liner 12.
  • the hemispheres 16 and 18 are formed of PNC and are PNC welded together as indicated by 40 in Figure 3.
  • Each of the PNC welds is sealed with a silicon sealing agent 42 such as "Seal and Flex Bostik Sealant" to ensure that the PNC welding is watertight.
  • Coupled to the liner 12 is an outlet pipe 24 which is coupled to the bottom most part of the inside of the liner so that fluid in the liner will exit via the outlet pipe 24.
  • an inlet pipe 26 Also coupled to the liner 12 is an inlet pipe 26. As indicated in Figure 2, a further inlet pipe 28 may be coupled to the liner 12. The angle at which the inlet pipes 26 and 28 are coupled to the liner depends on the situation of the maintenance shaft and pipe connector and angles of pipes desired to be connected together.
  • the pipes are coupled again by PNC welding and sealed with the silicon sealant.
  • Extending upwardly from the liner is a riser tube 30 which is also PNC welded to the liner and sealed with sealant.
  • the riser tube extends vertically in the normal manner and may be provided with a cover.
  • inlet and outlet pipes 24, 26 and 28 and riser tube 30 are all provided with puddle flanges 32.
  • the flanges are welded around the inlet and outlet pipes to provide a first part of a sealing means to prevent external water pressure forcing ground water between the concrete body 14 and the liner 12.
  • a second form of sealing means is provided just inside the puddle flanges 32 in the form of priming, gluing and bonding sand 44 to the exterior of the pipes.
  • This provides the concrete with the ability to bond to the pipe via the sand and thus provide additional sealing between the concrete body and liner and the pipes coupled thereto.
  • a further sealing means is provided in the form of a rubber ring 46 that sits around the PNC tube over the glued sand. The rubber ring 46 provides a further seal between the concrete and the liner and the pipes coupled thereto. It is noted that the sand may be glued in other places on the pipe, such as on both sides of the flange 32 and/or on either or both sides of the flange 32.
  • the pipes 24 and 26 may be coupled to a Hobas pipe 48 via a Hobas coupling 50 or another brand of pipe and coupling.
  • the rubber ring 46 is a 20 mm thick ring and the puddle flange 32 extends 50 mm wide of the pipe 24 similar to that used in pumping stations.
  • the hemispheres typically are made from 10 mm thick PNC sheeting. Concrete is preferably cast from cement and aggregate etc, having a minimum cement content of 350 kg/m .
  • FIG. 5 A more preferred form of the sewer maintenance shaft and pipe connector 10' is shown in Figures 5 and 6.
  • the reinforced casing in this version is fibre glass 60.
  • Fibre glass is layered over the liner 12, inlet pipe 26 and outlet pipe 24.
  • the plastics resin coats and bonds to the liner 12 and pipes 24 and 26 so that a seal is created in the form of the bond between the fibre glass and the liner/pipes 24 and 26.
  • the advantage of the fibre glass is that it provides the structural strength at a much lighter weight than the concrete version.
  • Pipes 24 and 26 can be connected to existing pipeline 48 by a suitable coupling, such as Hobas coupling described in relation to the previous embodiment.
  • the sewer maintenance shaft and pipe connector 10' is shown in situ ready for connection to existing pipe 48.
  • Riser 30 is connected to riser piping 42 which in turn is connected to a manhole 64 that allows access to the maintenance shaft and connector 10'.
  • the advantages of the present invention are that the sewer maintenance shaft and pipe connecter may be used at extreme depths that are subject to ground water pressure.
  • the reinforced casing provides sufficient strength to resist the pressures/weight at extreme depths. Corrosion resistance is provided by the PNC liner. The seals/bonding of casing to the liner ensure water does not gain access between the casing and the liner, which would otherwise defeat the purpose of the casing.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sewage (AREA)

Abstract

A sewer maintenance shaft and pipe connector (10) includes a liner (12) having at least one inlet pipe (26) coupled thereto and an outlet pipe coupled to the liner (24). A riser tube (30) extends upwardly from the liner. A reinforced casing (14 or 60) is cast around the liner. A sealing means is cast between the casing and each pipe.

Description

SEWER MAINTENANCE SHAFT AND PIPE CONNECTOR
Field of the Invention
The present invention relates to a sewer maintenance shaft and pipe connector suitable for use underground to provide access to sewer pipes and to connect sewer pipes together.
Background of the Invention
Many sewer pipes are deep underground, some in the vicinity of 12 metres or so. At that depth, ground water and soil weight apply a great deal of pressure to the pipes and sewer maintenance shafts. The sewer maintenance shaft must therefore be able to withstand the high pressures at these depths. Sewer maintenance shafts are often used as a point to join sewer pipes. It is desirable to have flexibility in joining pipes at different angles. In addition, the concrete of the human access chambers is susceptible to corrosion from the contents of the sewer pipes and therefore the maintenance shafts are generally constructed of plastics material. There is currently no simple trade off between ability to withstand pressure/weight and corrosion resistance because existing plastic maintenance shafts can be crushed by the pressures involved.
Summary of the Invention
In accordance with the present invention there is provided a sewer maintenance shaft and pipe connector including: a liner having at least one inlet pipe coupled thereto and an outlet pipe coupled to the liner; a riser tube extending upwardly from the liner; a reinforcing body cast around the liner; and a sealing means cast in the reinforcing body around each pipe.
Preferably the liner is spherical in shape with the outlet pipe coupled to the bottom most part of the liner. Preferably the reinforcing body is cast of concrete.
Preferably the sealing means includes a flange extending from each pipe. Preferably the sealing means includes a concrete bonding agent on an exterior surface portion of each pipe for bonding with the concrete body. Preferably the bonding agent is sand glued to the pipe. Preferably the sealing means includes a rubber ring extending around the pipe.
Preferably another sealing means is cast in the concrete body around the riser tube.
According to another aspect of the present invention there is provided a sewer maintenance shaft and pipe connector including: a liner having at least one inlet pipe coupled thereto and an outlet pipe coupled thereto; a riser tube extending upwardly from the liner; and a reinforcing casing bonded to the liner and/or the pipes.
Preferably the liner is spherical in shape with the outlet pipe coupled to the bottom most part of the lines.
Preferably the reinforcing casing is sealingly bonded to the liner and the pipes.
Preferably the reinforcing casing is in the form of fibre glass.
Detailed Description of Preferred Embodiments
In order to provide a better understanding, a preferred embodiment of the present invention will now be described with reference to the accompanying drawings, in which:
Figure 1 is a schematic side elevation of a sewer maintenance shaft and pipe connector in accordance with the present invention;
Figure 2 is a schematic plan view of the sewer maintenance shaft and pipe connector of Figure 1 ;
Figure 3 is an enlarged view of inset A of Figure 1; Figure 4 is an enlargement of a sealing means between a liner and casing of the sewer maintenance shaft and pipe connector of Figure 1;
Figure 5 is a schematic side elevation view of an alternative sewer maintenance shaft and pipe connector according to the present invention; and
Figure 6 is an enlargement showing the casing of the sewer maintenance shaft and pipe connector of Figure 5.
Referring to Figure 1, there is shown a sewer maintenance shaft and pipe connector 10 which includes a liner 12 encased in a reinforced casing in the form of a concrete body 14. The liner is fabricated first as two hemispheres 16 and 18 each having a circumferential flange 20 and 22 that mate to form the spherical liner 12. The hemispheres 16 and 18 are formed of PNC and are PNC welded together as indicated by 40 in Figure 3. Each of the PNC welds is sealed with a silicon sealing agent 42 such as "Seal and Flex Bostik Sealant" to ensure that the PNC welding is watertight.
Coupled to the liner 12 is an outlet pipe 24 which is coupled to the bottom most part of the inside of the liner so that fluid in the liner will exit via the outlet pipe 24.
Also coupled to the liner 12 is an inlet pipe 26. As indicated in Figure 2, a further inlet pipe 28 may be coupled to the liner 12. The angle at which the inlet pipes 26 and 28 are coupled to the liner depends on the situation of the maintenance shaft and pipe connector and angles of pipes desired to be connected together. The pipes are coupled again by PNC welding and sealed with the silicon sealant. Extending upwardly from the liner is a riser tube 30 which is also PNC welded to the liner and sealed with sealant.
The riser tube extends vertically in the normal manner and may be provided with a cover. In the inlet and outlet pipes 24, 26 and 28 and riser tube 30 are all provided with puddle flanges 32. The flanges are welded around the inlet and outlet pipes to provide a first part of a sealing means to prevent external water pressure forcing ground water between the concrete body 14 and the liner 12.
A second form of sealing means is provided just inside the puddle flanges 32 in the form of priming, gluing and bonding sand 44 to the exterior of the pipes. This provides the concrete with the ability to bond to the pipe via the sand and thus provide additional sealing between the concrete body and liner and the pipes coupled thereto. A further sealing means is provided in the form of a rubber ring 46 that sits around the PNC tube over the glued sand. The rubber ring 46 provides a further seal between the concrete and the liner and the pipes coupled thereto. It is noted that the sand may be glued in other places on the pipe, such as on both sides of the flange 32 and/or on either or both sides of the flange 32.
Once the pipes are welded to the spherical liner body at the desired angle the concrete body 14 is cast around the liner and pipes. The pipes 24 and 26 may be coupled to a Hobas pipe 48 via a Hobas coupling 50 or another brand of pipe and coupling.
In the preferred forms the rubber ring 46 is a 20 mm thick ring and the puddle flange 32 extends 50 mm wide of the pipe 24 similar to that used in pumping stations. The hemispheres typically are made from 10 mm thick PNC sheeting. Concrete is preferably cast from cement and aggregate etc, having a minimum cement content of 350 kg/m .
A more preferred form of the sewer maintenance shaft and pipe connector 10' is shown in Figures 5 and 6. In this embodiment an alternative reinforcing casing is used to the concrete of the previous embodiment 10. The reinforced casing in this version is fibre glass 60. Fibre glass is layered over the liner 12, inlet pipe 26 and outlet pipe 24. In the forming of the fibre glass casing, the plastics resin coats and bonds to the liner 12 and pipes 24 and 26 so that a seal is created in the form of the bond between the fibre glass and the liner/pipes 24 and 26. The advantage of the fibre glass is that it provides the structural strength at a much lighter weight than the concrete version. Pipes 24 and 26 can be connected to existing pipeline 48 by a suitable coupling, such as Hobas coupling described in relation to the previous embodiment. In Figure 5 the sewer maintenance shaft and pipe connector 10' is shown in situ ready for connection to existing pipe 48. Riser 30 is connected to riser piping 42 which in turn is connected to a manhole 64 that allows access to the maintenance shaft and connector 10'.
The advantages of the present invention are that the sewer maintenance shaft and pipe connecter may be used at extreme depths that are subject to ground water pressure. The reinforced casing provides sufficient strength to resist the pressures/weight at extreme depths. Corrosion resistance is provided by the PNC liner. The seals/bonding of casing to the liner ensure water does not gain access between the casing and the liner, which would otherwise defeat the purpose of the casing.
Modifications and variations may be made to the present invention without departing from the basic inventive concept. Such modifications may include using another form of concrete bonding agent, apart from sand, such as ceramics, stone, pebbles etc. Other forms of reinforced casing may be used.
Such modifications are intended to fall within the scope of the present invention, the nature of which is to be determined by the foregoing description and appended claims.

Claims

CLAIMS:
1. A sewer maintenance shaft and pipe connector including: a liner having at least one inlet pipe coupled thereto and an outlet pipe coupled to the liner; a riser tube extending upwardly from the liner; a reinforcing body cast around the liner; and a sealing means cast in the reinforcing body around each pipe.
2. A sewer maintenance shaft according to claim 1, wherein the liner is spherical in shape with the outlet pipe coupled to the bottom most part of the liner.
3. A sewer maintenance shaft according to claim 1, wherein the reinforcing body is case of concrete.
4. A sewer maintenance shaft according to claim 1, wherein the sealing means includes a flange extending from each pipe.
5. A sewer maintenance shaft according to claim 3, wherein the sealing means includes a concrete bonding agent on an exterior surface portion of each pipe for bonding with the concrete body.
6. A sewer maintenance shaft according to claim 5, wherein the bonding agent is sand glued to the pipe.
7. A sewer maintenance shaft according to claim 1, wherein the sealing means includes a rubber ring extending around the pipe.
8. A sewer maintenance shaft according to claim 1, wherein the reinforcing body is formed of fibre glass, and the sealing means being in the form of bonding of the fibre glass to the liner.
9. A sewer maintenance shaft and pipe connector including: a liner having at least one inlet pipe coupled thereto and an outlet pipe coupled thereto; a riser tube extending upwardly from the liner; and a reinforcing casing bonded to the liner and/or the pipes.
10. A sewer maintenance shaft according to claim 9, wherein the liner is spherical in shape with the outlet pipe coupled to the bottom most part of the lines.
11. A sewer maintenance shaft according to claim 9, wherein the reinforcing casing is sealingly bonded to the liner and the pipes.
12. A sewer maintenance shaft according to claim 9, wherein the reinforcing casing is in the form of fibre glass.
PCT/AU2002/001371 2001-10-05 2002-10-08 Sewer maintenance shaft and pipe connector WO2003031737A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPR8100A AUPR810001A0 (en) 2001-10-05 2001-10-05 Sewer maintenance shaft and pipe connector
AUPR8100 2001-10-05

Publications (1)

Publication Number Publication Date
WO2003031737A1 true WO2003031737A1 (en) 2003-04-17

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ID=3831928

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Application Number Title Priority Date Filing Date
PCT/AU2002/001371 WO2003031737A1 (en) 2001-10-05 2002-10-08 Sewer maintenance shaft and pipe connector

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WO (1) WO2003031737A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113187071B (en) * 2021-05-27 2022-08-23 中国建筑第二工程局有限公司 One-time pouring construction method for rainwater hopper

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018151A1 (en) * 1990-05-11 1991-11-28 Jackelen Developments Pty. Ltd. A manhole
EP0670395A2 (en) * 1994-03-03 1995-09-06 H. Niemeyer Söhne GmbH & Co. KG Lower element for manhole shafts
DE29704338U1 (en) * 1996-07-24 1997-04-30 Sendenhorst Kunststoffroehren Precast concrete shaft with a plastic lining
AU719582B2 (en) * 1994-05-18 2000-05-11 Vincent James Bray Access chamber base assembly
DE19939033C1 (en) * 1999-08-18 2001-02-08 Sendenhorst Kunststoffroehren Lower drainage shaft assembly has a liner body with inflow connections and a lower body with embrasure openings to be linked together according to the drainpipe layout

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018151A1 (en) * 1990-05-11 1991-11-28 Jackelen Developments Pty. Ltd. A manhole
EP0670395A2 (en) * 1994-03-03 1995-09-06 H. Niemeyer Söhne GmbH & Co. KG Lower element for manhole shafts
AU719582B2 (en) * 1994-05-18 2000-05-11 Vincent James Bray Access chamber base assembly
DE29704338U1 (en) * 1996-07-24 1997-04-30 Sendenhorst Kunststoffroehren Precast concrete shaft with a plastic lining
DE19939033C1 (en) * 1999-08-18 2001-02-08 Sendenhorst Kunststoffroehren Lower drainage shaft assembly has a liner body with inflow connections and a lower body with embrasure openings to be linked together according to the drainpipe layout

Also Published As

Publication number Publication date
AUPR810001A0 (en) 2001-10-25

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