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WO1993019258A1 - Regards et chambres d'inspection - Google Patents

Regards et chambres d'inspection Download PDF

Info

Publication number
WO1993019258A1
WO1993019258A1 PCT/GB1993/000554 GB9300554W WO9319258A1 WO 1993019258 A1 WO1993019258 A1 WO 1993019258A1 GB 9300554 W GB9300554 W GB 9300554W WO 9319258 A1 WO9319258 A1 WO 9319258A1
Authority
WO
WIPO (PCT)
Prior art keywords
manhole
inspection chamber
insert
drainage
base
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/GB1993/000554
Other languages
English (en)
Inventor
Christopher John Cawte
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.)
Caswick Ltd
Original Assignee
Caswick 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 Caswick Ltd filed Critical Caswick Ltd
Priority to GB9418094A priority Critical patent/GB2279373B/en
Publication of WO1993019258A1 publication Critical patent/WO1993019258A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • E03F5/024—Manhole shafts or other inspection chambers; Snow-filling openings; accessories made of plastic material
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • 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

  • This invention relates to manholes and inspection chambers. In particular, it relates to the base portions thereof.
  • manholes or inspection chambers which are accessible from a roadway or other surface.
  • manholes or inspection chambers which are accessible from a roadway or other surface.
  • these have been constructed in situ of brick or concrete. More recently, in the UK, plastics have been used for small diameter shafts of up to about 450 mm and shallow depths of less than about 1 m. Where man entry is required the minimum shaft diameter is about 900 mm and it is usual to use precast concrete sections to form the sides of the chamber.
  • the manhole bases are, however, made in situ. This takes time and labour and the quality is dependent upon the skill of the workers and site conditions.
  • an inspection chamber or manhole for a drainage system comprising a base portion, an insert portion adapted to lie at least partly upon said base and having one or more drainage channels fabricated within it, a plurality of support segments of desired arc lengths, the insert portion being supported at its edges between the top of the support, segments and a stack of shaft rings, wherein each piece is preformed and the structure is adapted to be assembled in situ and to be connected to the ends of drainage pipes.
  • the drainage pipes may.be installed at the same time as the chamber or manhole.
  • the chamber or manhole may be a replacement for an older installation, in which case it may be connected to drainage pipes which already exist in situ.
  • one or more or indeed all of the support segments may be integral with the base.
  • the insert portion may be in more than one piece.
  • a kit of parts for an inspection chamber or manhole for a drainage system comprising a base portion, an insert portion adapted to lie at least partly upon said base and having one or more drainage channels fabricated within it, a plurality of support segments of desired arc lengths, the insert portion being supported at its edges between the top of the support segments and a stack of shaft rings, wherein each piece is performed and the structure is adapted to be assembled in situ and to be connected to the ends of drainage pipes.
  • Figure 1 shows schematically a plan view of a first embodiment of a manhole
  • Figure 2 shows a cross-section through X-X
  • Figure 3 shows schematically a partly cutaway plan view of an alternative embodiment of a manhole
  • Figure 4 shows a cross-section through Y-Y.
  • the invention is equally applicable to manholes or any other type of inspection chamber.
  • a manhole is described below.
  • the manhole comprises a base l, which is usually circular but may be shaped otherwise, eg rectangular, square or octagonal, and which may be reinforced by a steel mesh 14.
  • the base may be flat.
  • the mesh provides additional strength to the base.
  • Lifting eyes 3 may be included in the upper surface of base 1. In the example shown, the eyes are set in a recessed portion la of the base.
  • the slab may contain one or more channels 2 for locating an insert portion 5.
  • the insert 5 forms, in situ, the base portion of the manhole and extends to partially or completely cover the top surface of base 1. Insert 5 will therefore generally be of approximately the same geometric shape as the base.
  • Insert portion 5 is preferably moulded of a plastics material, in one example this may be a polyolefin. Alternatively, it may be of metal, ceramics, glass, glass reinforced plastics or any other material. Portion 5 contains the drainage channels for the device and is formed with the required benching, invert and soffits. In the appropriate terminology, the invert is generally defined as the level of the bottom of flow and the soffit as the top of the flow level. The benching is the curvature or undulations which ensure that the flow travels in the correct direction and ensures that the detritus carried in the flow does not stick along its path.
  • the base 1 includes a groove 4.
  • a plurality of circumferential generally arcuate segments 15 are spaced around the edge of base 1 in the manner shown by dashed lines in Figure 1. As shown, the segments extend up to the site of the channels formed in moulded piece 5 and are therefore of different arc lengths as shown. In practice, a large number of segments 15 of different arc lengths may be fabricated such that any combination may be selected "off the shelf" to suite any desired combination of drainage channels. Segments 15 include a similarly curved longitudinal protrusion or tongue 15a adapted to be received in groove 4 to locate the segments with respect to base l.
  • a further groove 15b is located on the top of each of the segments for receiving the edge of portion 5, which preferably but not necessarily, has a matched profile to that of the segments, and/or the bottom of the lowermost one of a plurality of shaft rings 11 which form the sides of the manhole.
  • These rings may be made of concrete or of plastics for example.
  • a spreader ring, of metal for example, may be included to facilitate an even distribution of loads upon the segments and base.
  • the base 1 is positioned at the bottom of a prepared hole.
  • the plastic insert 5 is placed in position and the inlet and outlet pipes 6, 7 and 8 are checked for alignment. These should obviously register with the openings of pipes such as pipe 13.
  • the flow is from left to right in the main pipe and the pipes 8 are branches flowing into the main pipe.
  • the bottommost level of branch 8 is seen to be at the same level as the bottom of branch 7. However, in certain embodiments it is preferred that the branch enters a main flow path a distance up from the bottom of the path.
  • the plastics insert 5 is then lifted a small amount to allow positioning of the segments 25 (although in some embodiments one or all of the segments may be integral with, and therefore, non-removable from, the base) . As described above, a range of segments in different arc lengths are different sizes is made to allow numerous combinations of base l and insert 5 to suit numerous drainage designs.
  • the insert 5 is then located at the top of the segments 15.
  • the inlet and outlet pipes 6, 7 and 8 are then connected to a structure by any convenient manner.
  • the method used should preferably be one which is as watertight as possible, to avoid or reduce to a minimum any leakage. In the example shown, elastomeric sealing rings 13 located in sockets 12 are used. An alternative method is by welding.
  • the jointing of the inlet and outlet pipes may be internally or externally depending upon base complexity and size for example.
  • the shaft rings 11 are then placed concentrically on top of the plastics insert 5 and therefore locking it into the segments 15 by virtue of a matching joint profile 16 and 15b.
  • the edges of portion 5 and segments 15 are preferably of matching profile. It is desirable to make this area watertight by using an elastomeric seal or a sealing compound for example.
  • the joint between the base and segments may also be watertight.
  • the surface of insert 5 is tapered towards the channels, to facilitate drainage into the channels.
  • the edges of insert 5 may extend part way along the top surface of segments 15, into groove 15b for example, or may extend further, to the rear of the segments.
  • Insert 5 may be in several pieces.
  • the insert comprises a central portion 31 (shown in Figure 5) and an outer adaptor ring portion 32.
  • the body of central portion 31 may typically be of diameter 450 mm. In the embodiment shown, it has two 90° junctions. Other versions may have, for example, 45° junctions or other configurations.
  • the central portion 31 includes the required benching, soffits and inverts and is provided with connectors 36 for connection to pipes 34.
  • the method of connection can be any one which is substantially watertight. Portion 31 sits on a, substantially flat, base slab 33.
  • Adaptor ring 32 has an outside diameter equivalent to the normal diameter of the manhole or inspection chamber, eg 900 or 1200 mm. Its internal diameter is equal to the diameter of the central portion, typically 450 mm.
  • the adaptor ring 32 is has a gentle slope, typically of 1 in 12 (8%) downwards from its perimeter so that water or other fluids can drain into the central portion and therefore into the connected drainage pipes.
  • the central portion is also preferably gently sloped, at the same or a different angle towards the drainage channels fabricated within it, to ensure that fluids flow into the drainage channels.
  • the adaptor ring is sealed by any suitable means to the centre portion and to the bottom chamber ring 38.
  • Ring 12 may be of generally constant thickness, as shown in Figure 4.
  • the embodiment shown has an inner flange 39 for sealing with the side wall of central part 31.
  • eight support segments 35 are provided. These are shown in cross-section in Figure 4 and in dashed lines in Figure 3 where they are hidden by adaptor ring 32 which sits upon, and partially supported by, them. Two segments 35a and 35b are mounted side by side between adjacent pipes 34a and 34b, and this construction is repeated around the structure. As indicated by longitudinal cavity 40 the segments 35a may be hollow cored or otherwise be as lightweight as possible. Preferably, however, they are sufficiently strong to support adaptor ring 32 so that this can withstand the weight of a human standing on ring 32 who is inspecting or maintaining the open well formed by central portion 31. Typically, they might be expected to support a load equivalent to a 7 m head of water. Sealing and joints, where appropriate, are also preferably watertight to a pressure corresponding to this.
  • the pipes extend into the interior of the chamber as shown and are connected to the central portion 31 at flanges 37, by o-rings and/or other sealing means.
  • This embodiment may therefore be easier to assemble, and therefore preferable in some environments, than the embodiment of Figures 1 and 2.
  • a plurality of different centre pieces and adaptors may be made and/or purchased, of which a selected centre is matched with an appropriate base at the point of installation.
  • different centres may have two inputs and two outputs at 90°, or two outputs at 45°, or two, five or any other selected number of inlets/ outlets at selected angles.
  • Adaptor rings may be 450 mm to 1000 mm, 450 to 1200 mm or any other diameters. Where two of the inlets are at, say, 45° to one of the inlets, it may be necessary to have one segment portion 35 between the centraL inlet and each of the two inlets at 45°, and three segments between each of the 'angled' inlets and the outlet.
  • the segments may, as in this embodiment, all be identical or may be of different sizes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Sewage (AREA)

Abstract

Un système modulaire constitue une chambre d'inspection ou un regard destiné à un système de drainage. Il comprend une base (1), un segment rapporté (5) prévu de manière à reposer au moins partiellement sur cette base et comportant un ou plusieurs drains intégrés, et plusieurs segments de soutien (15), de longueurs d'arc appropriés et soutenant le segment rapporté à ses extrémités. Ce dernier est surmonté par des anneaux empilés (11) formant un puits, chaque pièce étant préformée et la structure se prêtant à un assemblage sur place et pouvant se raccorder aux canalisations de drainage.
PCT/GB1993/000554 1992-03-19 1993-03-18 Regards et chambres d'inspection Ceased WO1993019258A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9418094A GB2279373B (en) 1992-03-19 1993-03-18 Manholes and inspection chambers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9206034.2 1992-03-19
GB929206034A GB9206034D0 (en) 1992-03-19 1992-03-19 Manholes and inspection chambers

Publications (1)

Publication Number Publication Date
WO1993019258A1 true WO1993019258A1 (fr) 1993-09-30

Family

ID=10712472

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/000554 Ceased WO1993019258A1 (fr) 1992-03-19 1993-03-18 Regards et chambres d'inspection

Country Status (3)

Country Link
AU (1) AU3760193A (fr)
GB (2) GB9206034D0 (fr)
WO (1) WO1993019258A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2749334A1 (fr) * 1996-06-03 1997-12-05 Doutaves Michel Cave enterree et cuvelage etanche destine a realiser une telle cave
GB2465434A (en) * 2008-11-25 2010-05-26 Polypipe Civils Ltd Inspection chamber base formed using a modular mould
US7774988B2 (en) * 2003-09-11 2010-08-17 Pipelife Nederland B.V. Inspection chamber, as well as set of base parts therefor
CN106759384A (zh) * 2016-12-24 2017-05-31 中铁十八局集团有限公司 一种采用预制管道底板做深基坑支撑的方法
CN107956246A (zh) * 2017-11-08 2018-04-24 中国葛洲坝集团三峡建设工程有限公司 一种大型检查井分节预制安装施工方法
EP3575504A1 (fr) 2018-06-01 2019-12-04 Uponor Infra Oy Canal d'écoulement pour chambre d'inspection ou regard
JP2021165481A (ja) * 2020-04-07 2021-10-14 株式会社マツケン 組立マンホール装置及び組立マンホール装置を用いた排水工事の方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1229497A (fr) * 1968-10-22 1971-04-21
CH523386A (de) * 1970-05-26 1972-05-31 Fachverband Steinzeugind Schachttopf für Kanalisationszwecke u. dgl.
FR2237476A5 (en) * 1973-06-22 1975-02-07 Zeraffa Jacques Construction of drain pipes in bottom of manholes - involves using bowl shaped connector made of plastics to receive pipes
CH661552A5 (en) * 1983-04-13 1987-07-31 Bruno Muntwiler Sheet-like, dimensionally stable structural element for producing manhole continuous footings
WO1991018151A1 (fr) * 1990-05-11 1991-11-28 Jackelen Developments Pty. Ltd. Trou d'homme

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1229497A (fr) * 1968-10-22 1971-04-21
CH523386A (de) * 1970-05-26 1972-05-31 Fachverband Steinzeugind Schachttopf für Kanalisationszwecke u. dgl.
FR2237476A5 (en) * 1973-06-22 1975-02-07 Zeraffa Jacques Construction of drain pipes in bottom of manholes - involves using bowl shaped connector made of plastics to receive pipes
CH661552A5 (en) * 1983-04-13 1987-07-31 Bruno Muntwiler Sheet-like, dimensionally stable structural element for producing manhole continuous footings
WO1991018151A1 (fr) * 1990-05-11 1991-11-28 Jackelen Developments Pty. Ltd. Trou d'homme

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2749334A1 (fr) * 1996-06-03 1997-12-05 Doutaves Michel Cave enterree et cuvelage etanche destine a realiser une telle cave
US7774988B2 (en) * 2003-09-11 2010-08-17 Pipelife Nederland B.V. Inspection chamber, as well as set of base parts therefor
GB2465434A (en) * 2008-11-25 2010-05-26 Polypipe Civils Ltd Inspection chamber base formed using a modular mould
GB2465434B (en) * 2008-11-25 2013-09-04 Polypipe Ltd Inspection chambers
CN106759384A (zh) * 2016-12-24 2017-05-31 中铁十八局集团有限公司 一种采用预制管道底板做深基坑支撑的方法
CN107956246A (zh) * 2017-11-08 2018-04-24 中国葛洲坝集团三峡建设工程有限公司 一种大型检查井分节预制安装施工方法
EP3575504A1 (fr) 2018-06-01 2019-12-04 Uponor Infra Oy Canal d'écoulement pour chambre d'inspection ou regard
JP2021165481A (ja) * 2020-04-07 2021-10-14 株式会社マツケン 組立マンホール装置及び組立マンホール装置を用いた排水工事の方法

Also Published As

Publication number Publication date
GB2279373B (en) 1995-07-19
AU3760193A (en) 1993-10-21
GB9206034D0 (en) 1992-04-29
GB2279373A (en) 1995-01-04
GB9418094D0 (en) 1994-10-26

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