EP1000201B1 - Cadre pour tampon de regard - Google Patents

Cadre pour tampon de regard Download PDF

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Publication number
EP1000201B1
EP1000201B1 EP98937636A EP98937636A EP1000201B1 EP 1000201 B1 EP1000201 B1 EP 1000201B1 EP 98937636 A EP98937636 A EP 98937636A EP 98937636 A EP98937636 A EP 98937636A EP 1000201 B1 EP1000201 B1 EP 1000201B1
Authority
EP
European Patent Office
Prior art keywords
frame
ribs
manhole
mortar
corners
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.)
Expired - Lifetime
Application number
EP98937636A
Other languages
German (de)
English (en)
Other versions
EP1000201A1 (fr
Inventor
Andrew Scott
Christopher Brown
Peter Fines
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.)
Saint Gobain PAM UK Ltd
Original Assignee
Saint Gobain Pipelines PLC
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 Saint Gobain Pipelines PLC filed Critical Saint Gobain Pipelines PLC
Publication of EP1000201A1 publication Critical patent/EP1000201A1/fr
Application granted granted Critical
Publication of EP1000201B1 publication Critical patent/EP1000201B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • 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
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • E02D29/1454—Non-circular covers, e.g. hexagonal, elliptic
    • 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
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • E02D29/1463—Hinged connection of cover to frame

Definitions

  • This invention relates to a frame for supporting a manhole cover and to the combination of the frame and manhole cover.
  • Manhole covers have been known for many years and early examples of such covers are disclosed in UK Patents numbers 27,088 of 1910 and 4221 of 1910, both in the name of Samuel Henry Adams, and documents cited therein.
  • the Adams manhole covers employ generally circular frames which have curved or sloping flanges around the upper end of the frame, the sloping flanges being intended to present an inclined surface, rather than an abrupt edge, as the road material around the manhole erodes away during use.
  • the flanges are provided with an array of holes, or ribs, or other protrusions to assist in anchoring the frame in the road surface and to increase the durability of the road surface in which the frame is anchored.
  • manhole covers and frames therefor are disclosed in GB-A-1,162,434 , GB-A-2 080 373 , GB-A-2 291 452 , GB-A-2 299 603 and US-A-5,240,346 , GB 664 152 A and GB 24 454 A .
  • the invention provides a frame for supporting a manhole cover; the frame comprising an upstanding peripheral wall; support means extending inwardly from at least part of the wall for supporting a manhole cover; and an outer flange extending outwardly from a lower part of the wall for anchoring the frame in the ground; characterised in that the outer flange has disposed over an, in use, upper surface thereof a plurality of ribs for enhancing the anchoring of the flange and stiffening the frame against bending, the frame having one or more corners, and the ribs being at or adjacent the corner(s) of the frame.
  • the frame can be of any shape or size and can for example be circular or non circular in form. Most preferably the frame is rectangular.
  • the plurality of elongate ribs serve to increase the stiffness of the frame and increase its resistance to bending.
  • the presence of such reinforcing protrusions at the corners of the frame has been found to be particularly important with rectangular frames.
  • the protrusions e.g. ribs
  • the ribs are preferably substantially parallel, and at least a central one of said array of ribs may be oriented towards the centre of the frame. For example, when the frame is rectangular, the ribs can be aligned in a diagonal direction with respect to the corners of the frame.
  • the outer flange of the frame preferably has a plurality of wider regions interspersed with a plurality of narrower regions.
  • the wider regions of the outer flange are disposed at the corners of the frame, thereby serving to further stiffen the frame against bending. This is important since loading tends to be concentrated at the corners of the frame.
  • at least the surfaces of the wider regions of the outer flange have a plurality of protrusions (e.g. elongate ribs) disposed thereon.
  • the grout holes present in known manhole unit frames which are intended as a means of anchoring the frame into the bedding mortar, actually increase the stress within the mortar. Therefore, it is most preferred that the frame contains no such grout holes or, if grout holes are present, that they be located away from the corners.
  • the invention provides a manhole cover assembly comprising a frame as hereinbefore defined, and a manhole cover configured so as to be supported in a seat defined by the peripheral wall and the support means.
  • the invention also provides a manhole installation comprising a manhole having a layer of bedding material surrounding the mouth thereof, a frame as hereinbefore defined being set into the bedding material, the outer flange being substantially completely covered by the bedding material; and a manhole cover removably mounted in the frame.
  • the bedding material can be, for example, a mortar or a combination of mortar and a "backfill" material such as asphalt or similar materials.
  • the outer flange can be substantially completely surrounded by mortar, or it can be set into a layer of mortar and a layer of backfill material compacted on top of the flange.
  • Figures 1a and 1b illustrate a known type of manhole cover frame 2 of rectangular form.
  • the frame 2 comprises an upstanding peripheral wall 4 from the lower end of which extends an outer flange 6 which is of substantially uniform width.
  • Outer flange 6 has a relatively low upturned rim 8 at its outermost extent and has a number of webbing elements 10 linking the rim 8 with the upstanding peripheral wall 4 to provide reinforcement thereto.
  • inner ledges 14 and 18 extend part way round the inner side of the wall 4.
  • Frames of the type shown in Figures 1a and 1b in use can be set into a bed of mortar surrounding a manhole such that either the outer flange 6 is wholly contained within the mortar, or such that the flange rests on a layer of mortar and a layer of backfill material such as asphalt is compacted on top of the flange.
  • An array of eight elongate holes 12, known as grout holes, are spaced around the outer flange 6, their function being to provide a means of keying the flange into the surrounding mortar bed to hold the frame in place.
  • Figures 2 to 5 illustrate improved manhole cover frames in accordance with the invention.
  • the manhole assembly comprises a frame 20 and a pair of manhole covers 22 which are of a generally triangular shape. Keyholes 24 are provided in each cover 22 for engagement with a tool for lifting the covers.
  • the frame 20 is of rectangular form and has four corners 26.
  • the frame comprises an upstanding peripheral wall 28, from the lower edge of which a flange 30 extends outwardly.
  • Flange 30 has wider portions 32 at the corners 26 and narrower portions 34 between the corners.
  • webbing elements 36, 38 extend between the flange 30 and the wall 28 to provide reinforcement.
  • Ledges 40, 42 extend inwardly of the peripheral wall 28 to provide a means of supporting the covers 22.
  • the ledges can be ribbed and can span the inner corners of the wall 28, as shown in Figure 4, or they can be of a non-ribbed form and of generally uniform width as shown in Figure 3. It will be appreciated however that the ledges for supporting the manhole covers need not have the shapes shown but can take any of a wide variety of different shapes.
  • the wider portions 32 of the flange are reinforced by means of arrays of aligned substantially parallel ribs 44 which are oriented in a generally diagonal direction.
  • Ribs 44 perform several functions. Firstly they serve to reinforce the corners to provide a stiffening effect to improve the resistance of the frame to bending and distortion under the weight of road traffic.
  • the ribs increase the surface area over which the flange is in contact with the mortar 46 (or combination of mortar and backfill material) into which the frame is embedded in use. This latter effect is shown more clearly in Figure 5.
  • the flange 30 is shown as being wholly embedded in the bedding mortar. However, alternatively, the flange could be set into a layer of mortar and a layer of backfill material such as asphalt compacted onto the top surface of the flange as previously indicated.
  • the ribs 44 thus enable the flange to be retained more securely in the mortar and this means that the frame is better able to withstand the forces (represented by the double headed arrow D in Figure 5) created by vehicles braking on the manhole covers 22.
  • the flange 30 lacks the grout holes of the known manhole frame shown in Figures 1a and 1b, and the absence of the grout holes removes another source of stress in the mortar 46.
  • the ribs 44 are formed as raised projections from the upper surface, of the flange.
  • the ribs can be defined by a series of elongate recesses 48, the surfaces 50 of the flange between the recesses 48 defining the ribs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Claims (11)

  1. Cadre (20) pour supporter un tampon de regard (22) ; le cadre (20) comprenant une paroi périphérique verticale (28) ; des moyens de support (40 ; 42) s'étendant vers l'intérieur à partir d'au moins une partie de la paroi (23) pour supporter un tampon de regard (22) ; et une bride extérieure (30) s'étendant vers l'extérieur à partir d'une partie inférieure de la paroi (23) pour ancrer le cadre dans le sol ; caractérisé en ce que la bride extérieure (30) possède, disposée sur une surface supérieure, au cours de l'utilisation, de celle-ci, une pluralité de nervures (44 ; 50) pour améliorer l'ancrage de la bride (30) et raidir le cadre (20) contre la flexion, le cadre (20) comportant un ou plusieurs angles (26), et les nervures (44, 50) étant aux angles(s) (26) du cadre (20), ou adjacents.
  2. Cadre selon la revendication 1, dans lequel la bride extérieure est pourvue d'une pluralité de régions larges (32, 34), qui sont espacées les unes des autres autour de la périphérie de la bride par des régions intermédiaires de moindre largeur, chacune des régions larges comportant, disposées sur celle-ci, une pluralité des nervures (44 ; 50).
  3. Cadre selon la revendication 2, dans lequel les nervures (44 ; 50) définissent une pluralité de nervures oblongues sensiblement parallèles (44 ; 50).
  4. Cadre selon la revendication 3, dans lequel une nervure centrale parmi la pluralité de nervures (44 ; 50) est orientée vers le centre du cadre (20).
  5. Cadre selon l'une quelconque des revendications précédentes, dans lequel la paroi périphérique verticale (28) possède un ou plusieurs angles (26).
  6. Cadre selon la revendication 5, dans lequel la paroi périphérique verticale (28) présente la forme d'un rectangle.
  7. Cadre selon la revendication 6, dans lequel chaque angle (26) du rectangle est pourvu d'une série desdites nervures sensiblement parallèles orientées diagonalement (44 ; 50).
  8. Cadre selon la revendication 2 ou l'une quelconque des revendications précédentes dépendant de celle-ci, dans lequel les régions larges (32) de la bride extérieure (30) sont disposées aux angles (26) du cadre.
  9. Cadre selon l'une quelconque des revendications précédentes, dans lequel la bride extérieure (30) dans le voisinage des angles est sensiblement dépourvue de trous d'injection.
  10. Ensemble de tampon de regard comprenant un cadre (20) selon l'une quelconque des revendications précédentes et un tampon de regard (22) configuré afin d'être supporté dans un siège défini par la paroi périphérique (28) et les moyens de support (40 ; 42).
  11. Installation de regard comprenant un regard comportant une couche de mortier entourant l'embouchure de celui-ci, un cadre (20) selon l'une quelconque des revendications 1 à 9 étant placé dans le mortier, la bride extérieure (28) étant recouverte de façon sensiblement complète par le mortier ; et un tampon de regard (22) étant monté de façon amovible dans le cadre.
EP98937636A 1997-07-31 1998-07-31 Cadre pour tampon de regard Expired - Lifetime EP1000201B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9716243A GB2327965B (en) 1997-07-31 1997-07-31 A frame for a manhole cover
GB9716243 1997-07-31
PCT/GB1998/002312 WO1999006640A1 (fr) 1997-07-31 1998-07-31 Cadre pour tampon de regard

Publications (2)

Publication Number Publication Date
EP1000201A1 EP1000201A1 (fr) 2000-05-17
EP1000201B1 true EP1000201B1 (fr) 2007-11-21

Family

ID=10816796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98937636A Expired - Lifetime EP1000201B1 (fr) 1997-07-31 1998-07-31 Cadre pour tampon de regard

Country Status (8)

Country Link
EP (1) EP1000201B1 (fr)
CN (1) CN1270650A (fr)
AU (1) AU8636498A (fr)
CA (1) CA2298535A1 (fr)
DE (1) DE69838753D1 (fr)
ES (1) ES2297890T3 (fr)
GB (2) GB2327965B (fr)
WO (1) WO1999006640A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU756128B2 (en) * 1998-04-03 2003-01-02 Farnell & Thomas Limited Improved access cover support frame and members
GB2353557A (en) * 1999-04-30 2001-02-28 James Stuart Austin Trench safety cover
GB2348665B (en) * 1999-12-23 2000-12-13 C I S Ground surface access assemblies
GB2361500B (en) * 2001-04-09 2003-01-15 Savage Peter Ltd A frame for a manhole cover or gully grating
GB2376495B (en) * 2001-06-14 2004-12-15 Wrekin Welding & Fabrication E Ground surface access assemblies
GB2381817B (en) * 2001-11-10 2003-10-22 Clarksteel Ltd Improvements in and relating to access covers
GB2390629B (en) * 2002-07-10 2005-12-21 Saint Gobain Pipelines Plc A frame for bounding a recess and related assemblies
GB0330271D0 (en) * 2003-12-31 2004-02-04 Saint Gobain Pipelines Plc A covering for an access aperture,and related assemblies
GB2421754A (en) * 2004-12-29 2006-07-05 Saint Gobain Pipelines Plc Manhole assembly
NZ548488A (en) * 2006-07-11 2009-07-31 Sika Technology Ltd Improvements in/or relating to utility chambers and surrounds
WO2012135914A1 (fr) * 2011-04-08 2012-10-11 Pacific Composites Pty Ltd Cadre pour encercler une fosse et procédé de fabrication
US10025342B2 (en) 2015-03-30 2018-07-17 Sony Corporation Control circuit of power gating and semiconductor device
GB2588281B (en) * 2018-03-30 2021-11-24 Wrekin Holdings Ltd An improved ground surface access assembly frame
GB2572445B (en) * 2018-03-30 2020-09-30 Wrekin Holdings Ltd A ground surface access assembly

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191004221A (en) 1910-02-21 1911-01-12 Samuel Henry Adams Improvements in Manhole, Gully and other Surface Covers.
GB191024454A (en) * 1910-10-21 1911-01-12 Samuel Henry Adams Improvements in Frames for Manhole Surface Boxes, Gully Grates and the like.
GB191027088A (en) 1910-11-22 1911-07-20 Samuel Henry Adams Improvements in Manhole Covers, Surface Boxes, Gully Grate Frames and the like.
GB664152A (en) * 1949-01-13 1952-01-02 Ewart Blanch Herbert Improvements in or relating to manhole covers and frames
GB1162434A (en) * 1967-03-14 1969-08-27 Brickhouse Foundry Ltd Improvements in or relating to Man-Hole Covers.
GB2080373B (en) * 1980-07-22 1984-03-14 British Steel Corp Roadside gully boxes
US5240346A (en) * 1992-02-05 1993-08-31 Yin Chun Chou Manhole having a splayed rib ring formed at underside of the lid thereof
GB2291452A (en) * 1994-07-16 1996-01-24 Glynwed Foundry Prod Ltd Cover and frame assembly
GB2299603B (en) * 1995-04-06 1998-07-08 C I S Manhole Arrangements

Also Published As

Publication number Publication date
GB2327965A (en) 1999-02-10
DE69838753D1 (de) 2008-01-03
GB0110629D0 (en) 2001-06-20
WO1999006640A1 (fr) 1999-02-11
GB2327965B (en) 2002-04-17
AU8636498A (en) 1999-02-22
CA2298535A1 (fr) 1999-02-11
EP1000201A1 (fr) 2000-05-17
GB2359319A (en) 2001-08-22
ES2297890T3 (es) 2008-05-01
GB9716243D0 (en) 1997-10-08
CN1270650A (zh) 2000-10-18

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