EP0906477B1 - Top piece for a manhole structure - Google Patents
Top piece for a manhole structure Download PDFInfo
- Publication number
- EP0906477B1 EP0906477B1 EP97926286A EP97926286A EP0906477B1 EP 0906477 B1 EP0906477 B1 EP 0906477B1 EP 97926286 A EP97926286 A EP 97926286A EP 97926286 A EP97926286 A EP 97926286A EP 0906477 B1 EP0906477 B1 EP 0906477B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cone
- top piece
- peripheral edge
- ribs
- piece according
- 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
Links
Images
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
Definitions
- the present invention relates to a top piece for a manhole structure, comprising an access part and a cone which connects to the access part and can be placed on a manhole structure shaft with a peripheral edge on the side of the cone opposite the access part, the cone having a substantially outward curved basic shape.
- top piece is known in practice. Owing to the outward curved shape, the top piece in general has good resistance to pressure forces which are exerted on the top piece by the ground surrounding the manhole structure.
- the disadvantage of the known top piece is, however, that the region of the transition from the cone to the access part is more readily deformed than the cone or the access part.
- An extreme pressure load as the result of the mutually amplifying radially inward directed components of forces exerted on the transition, can cause the top piece to bend inwards at that position.
- the object of the invention is to provide a top piece which does not have this disadvantage.
- the top piece according to the invention is characterized in that in the region of the transition from the access part to the cone, a reinforcement rib, which is substantially parallel to the plane in which the peripheral edge is situated, is provided on the outer surface of the cone, which rib extends over the entire periphery of the cone.
- this reinforcement rib gives the cone in the region of the transition to the access part greater resistance to radially inward directed forces than is the case without said rib.
- the manhole structure 1 shown in Fig. 1 is substantially cylindrical and comprises a bottom 2 on which a manhole structure shaft 3 is placed.
- the manhole structure 1 further comprises a top piece 4 which is placed on the manhole structure shaft 3.
- the top piece 4 consists substantially of two parts, a cone 5 and an access part 6. There is a sharp transition 21 between the cone 5 and the access part 6.
- Fitted around the access part 6 is a concrete ring 7, which can slide up and down over the access part 6.
- the concrete ring 7 serves as a support for a manhole cover edge 8.
- a manhole cover (not shown) of standardized dimensions, which shuts off the manhole formed by the access part, can be placed in this manhole cover edge 8.
- the top piece 4 can be placed on manhole structures for pipe systems, for example a sewer system.
- a number of connecting sockets 9 are fitted in the bottom 2 of the manhole structure 1, for making the connection of the manhole structure 1 to the pipe system.
- the manhole structure shaft 3 and the top piece 4 are provided with shaft sockets 10, 11.
- the parts of the bottom 2 and the manhole structure shaft 3 projecting into the shaft sockets 10, 11 respectively are reinforced by means of peripheral ribs 14, 15.
- the seal between the bottom 2 and the shaft socket 10 and between the manhole structure shaft 3 and the shaft socket 11 is provided by sealing rings 12, 13.
- the access part 6 is provided with reinforcement ribs 16 on the outside.
- the dimensions of the concrete ring 7 are standardized.
- the external diameter of the access part 6 is thus determined by the internal diameter of the concrete ring 7. Owing to the large number of reinforcement ribs 16, the reinforcement ribs 16 can be small, and the internal diameter/external diameter ratio is as large as possible.
- the cone 5 has a substantially outward curved basic shape and at its underside defines a peripheral edge 17.
- the cone 5 comprises a first part 18 whose cross-sections, which are parallel to the peripheral edge 17, are substantially circular, but have different diameters, and all intersect one straight line which is substantially parallel to the axis of the access part 6.
- the first part 18 consequently has one straight generating line 20.
- the cone 5 further comprises a second part 19 which is situated between the first part 18 and the access part 6, and whose cross-sections parallel to the peripheral edge 17 are likewise circular, but do not intersect a straight line.
- the cross-sections of the first part 18 and the second part 19 of the cone parallel to the peripheral edge 17 can also be of a different shape, for example an elliptical shape.
- the shaft socket 11 increases the resistance of the peripheral edge 17 to forces in the radial direction, and thus to deformation of the peripheral edge inwards and outwards in the radial direction.
- the curved generating lines of the cone 5 will tend to stretch. Since the movement of the peripheral edge 17 is limited in the horizontal direction by the shaft socket 11 and in the vertical direction by the manhole structure shaft 3, this stretching will be evident particularly by a movement of the transition 21 radially inwards.
- a reinforcement rib 22 is provided on the outer surface of the second part 19 in the region of the transition 21. Said reinforcement rib 22 forms a continuous closed ring.
- each rib 23 extends over an equal distance from the straight generating line 20 to both sides of the cone 5.
- These ribs 23 also increase the resistance of the cone 5 to compression.
- a number of slanting ribs 24, placed at an angle relative to the plane in which the peripheral edge 17 is situated, are provided in the region of the outer surface of the cone 5 lying diametrically opposite the straight generating line 20. This means that the slanting ribs 24 are substantially at right angles to the outer surface of the cone 5, which has a beneficial effect on the resistance of the cone 5 to pressure forces.
- the two ribs 23 situated closest to the peripheral edge 17 run on and form a continuous closed ring.
- a rib 25 is provided on the outer surface of the cone 5. Said rib 25 also increases the resistance of the cone 5 to compression. Moreover, said rib 25 prevents bending of the slanting ribs 24 as a result of the vertical component of forces exerted on the slanting ribs 24.
- the ribs 23 pass smoothly into the slanting ribs 24. In this case the ribs 23 do not extend to the next slanting ribs 24.
- all slanting ribs 24 extend from the peripheral edge 17, by way of the region which is situated diametrically opposite the straight generating line 20, to the peripheral edge 17 at the other side of the top piece 4.
- the ribs 23 extend from the straight generating line 20 to the first slanting rib 24. Therefore, for all ribs 23 this is the same slanting rib 24.
- the access part 6 can be placed either concentrically or eccentrically on the cone 5.
- two ribs which are parallel to the axis of the access part 6 can be provided on the inside of the cone 5. These ribs give additional reinforcement of the outer surface of the top piece 4.
- Rungs can be fixed between the ribs, thereby forming a ladder part, in order to facilitate access to the manhole structure 1.
- the bottom 2, the manhole structure shaft 3 and the top piece 4 are in practice preferably made of synthetic material.
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Sewage (AREA)
- Table Devices Or Equipment (AREA)
- Beans For Foods Or Fodder (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Filters For Electric Vacuum Cleaners (AREA)
- Farming Of Fish And Shellfish (AREA)
- Dry Shavers And Clippers (AREA)
- Earth Drilling (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
Description
Claims (13)
- Top piece (4) for a manhole structure (1), comprising an access part (6) and a cone (5) which connects to the access part and can be placed on a manhole structure shaft (3) with a peripheral edge (17) on the side of the cone opposite the access part, the cone having a substantially outward curved basic shape, characterized in that in the region of the transition (21) from the access part (6) to the cone (5), a reinforcement rib (22), which is substantially parallel to the plane in which the peripheral edge (17) is situated, is provided on the outer surface of the cone (5), which rib extends over the entire periphery of the cone (5).
- Top piece according to claim 1, characterized in that one or more ribs (23) are provided on the outer surface of the cone (5), parallel to the reinforcement rib (22), and extending over at least part of the periphery of the cone (5).
- Top piece according to claim 1 or 2, characterized in that the access part (6) is provided eccentrically relative to the peripheral edge (17).
- Top piece according to one of claims 1 - 3, characterized in that the cone (5) consists substantially of two parts, a first part (18) which connects to the peripheral edge (17) and has substantially one straight generating line (20) and a second part (19) which is situated between the first part (18) and the access part (6) and has curved generating lines.
- Top piece according to claim 3 or 4, characterized in that one or more ribs (24), placed at an angle to the peripheral edge, are provided on the outside of the cone (5), on the side of the cone (5) lying diametrically opposite the straight generating line (20) of the cone (5).
- Top piece according to claim 5, characterized in that the ribs (24) placed at an angle to the peripheral edge extend substantially at right angles to the curved generating lines.
- Top piece according to claim 5 or 6, characterized in that one or more ribs (23) extending parallel to the peripheral edge extend from the straight generating line (20) to at least one rib (24) placed at an angle to the peripheral edge.
- Top piece according to one of claims 5 - 7, characterized in that each rib (23) extending parallel to the peripheral edge merges into at least one rib (24) placed at an angle to the peripheral edge.
- Top piece according to claim 8, characterized in that the ribs (23) extending parallel to the peripheral edge continue to run parallel to the peripheral edge (17) from the transitions to a slanting rib (24).
- Top piece according to claim 9, characterized in that one or more ribs (23) extending parallel to the peripheral edge continue to the next slanting rib (24).
- Top piece according to one of claims 4 - 10, characterized in that diametrically opposite the straight generating line (20) a rib (25), lying in the plane through the axis of the cone (5) and the straight generating line (20), is provided on the outside surface of the cone (5).
- Top piece according to one of claims 1 - 11, characterized in that two ribs are provided, extending in the interior of the top piece from the inside wall inwards and parallel to the axis of the access part (6).
- Top piece according to claim 12, characterized in that rungs are fixed between the ribs, for forming a part of a ladder.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1003376A NL1003376C2 (en) | 1996-06-19 | 1996-06-19 | Attachment for a well. |
NL1003376 | 1996-06-19 | ||
PCT/NL1997/000338 WO1997048859A1 (en) | 1996-06-19 | 1997-06-17 | Top piece for a manhole structure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0906477A1 EP0906477A1 (en) | 1999-04-07 |
EP0906477B1 true EP0906477B1 (en) | 2002-03-27 |
Family
ID=19763041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97926286A Expired - Lifetime EP0906477B1 (en) | 1996-06-19 | 1997-06-17 | Top piece for a manhole structure |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0906477B1 (en) |
AT (1) | ATE215154T1 (en) |
AU (1) | AU3108997A (en) |
CZ (1) | CZ295673B6 (en) |
DE (1) | DE69711377T2 (en) |
DK (1) | DK0906477T3 (en) |
ES (1) | ES2174261T3 (en) |
NL (1) | NL1003376C2 (en) |
PL (1) | PL183744B1 (en) |
WO (1) | WO1997048859A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008011435A1 (en) | 2008-02-27 | 2009-09-03 | Fränkische Rohrwerke Gebr. Kirchner Gmbh & Co. Kg | Hopper upper section for arranging servicing hopper, has connecting unit, where hopper upper section is connected with hopper pipe or hopper lower section by connecting unit |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2790495B1 (en) | 1999-03-05 | 2001-05-11 | Polva Pipelife Bv | WELL STRUCTURE |
DE19961414C2 (en) * | 1999-12-17 | 2002-06-27 | Horst Hammes | Cylindrical plastic shaft that can be inserted into the ground |
DK200100035A (en) * | 2001-01-10 | 2002-07-11 | Soerensen Peder Hoven | throughput Well |
FR2873392B1 (en) * | 2004-07-21 | 2008-04-11 | Groupe Maillard Ind Gmi Sa | DEVICE FOR LOOKING AT, IN PARTICULAR FOR A WATER METER |
DE202005010489U1 (en) * | 2005-06-29 | 2006-08-17 | Rehau Ag + Co. | Schacht shell |
DE202005010486U1 (en) * | 2005-06-29 | 2006-08-24 | Rehau Ag + Co. | Schacht shell |
DE102006053996A1 (en) * | 2006-11-16 | 2008-05-29 | Lic Langmatz Gmbh | Shaft for inserting in ground in area of road or footpath, has shaft cover lies on upper surrounding edge profile, which is arranged on wall with its side towards above and edge profile has central bar on upper side of wall |
NL1033353C2 (en) * | 2007-02-07 | 2008-08-11 | Wavin Bv | Pot element. |
EP2000598A1 (en) * | 2007-06-04 | 2008-12-10 | Ifw Manfred Otte GmbH | Upper part of a manhole shaft |
FR2939158A1 (en) * | 2008-12-01 | 2010-06-04 | Persohn Sa | Modular buried manhole for receiving water meter, has tubular segments whose peripheral wall is equipped with annular flange forming internal annular braced stiffener and external annular braced stiffeners |
CN104863238A (en) * | 2015-05-30 | 2015-08-26 | 合肥中科富华新材料有限公司 | High-strength whole inspection well |
CN104846844A (en) * | 2015-05-30 | 2015-08-19 | 合肥中科富华新材料有限公司 | Reinforced integral inspection well |
CN104863239A (en) * | 2015-05-30 | 2015-08-26 | 合肥中科富华新材料有限公司 | Environmentally friendly plastic inspection well |
CN104847002A (en) * | 2015-05-30 | 2015-08-19 | 合肥中科富华新材料有限公司 | High-strength plastic inspection well |
DE202018100554U1 (en) * | 2018-02-01 | 2019-05-09 | Rehau Ag + Co | adapter component |
DE102020206402A1 (en) | 2020-05-22 | 2021-11-25 | Hegler Plastik Gmbh | Kit for an inspection shaft and seal for such a kit |
NL2031460B1 (en) * | 2022-03-30 | 2023-10-24 | Dyka B V | A Gully |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4089139A (en) * | 1976-08-24 | 1978-05-16 | Armco Steel Corporation | Segmented cylindrical reinforced plastic manhole structure |
NL7810714A (en) * | 1978-10-27 | 1980-04-29 | Dirk Van De Kerke | Inspection shaft of polyester for sewer installations - has extruded reinforcing profile wound spirally round it forming flanges |
US4275757A (en) * | 1979-08-06 | 1981-06-30 | Singer Frederic J | Manhole structure and method of making same |
DE4315535C2 (en) * | 1993-05-10 | 1997-01-09 | Kordes Klaeranlagen U Pumpwerk | Plastic shaft |
WO1995006185A1 (en) * | 1993-08-25 | 1995-03-02 | Horst Guggemos | Prefabricated shaft element |
-
1996
- 1996-06-19 NL NL1003376A patent/NL1003376C2/en not_active IP Right Cessation
-
1997
- 1997-06-17 CZ CZ19984073A patent/CZ295673B6/en not_active IP Right Cessation
- 1997-06-17 DK DK97926286T patent/DK0906477T3/en active
- 1997-06-17 EP EP97926286A patent/EP0906477B1/en not_active Expired - Lifetime
- 1997-06-17 WO PCT/NL1997/000338 patent/WO1997048859A1/en active IP Right Grant
- 1997-06-17 ES ES97926286T patent/ES2174261T3/en not_active Expired - Lifetime
- 1997-06-17 PL PL97330600A patent/PL183744B1/en unknown
- 1997-06-17 DE DE69711377T patent/DE69711377T2/en not_active Expired - Lifetime
- 1997-06-17 AT AT97926286T patent/ATE215154T1/en not_active IP Right Cessation
- 1997-06-17 AU AU31089/97A patent/AU3108997A/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008011435A1 (en) | 2008-02-27 | 2009-09-03 | Fränkische Rohrwerke Gebr. Kirchner Gmbh & Co. Kg | Hopper upper section for arranging servicing hopper, has connecting unit, where hopper upper section is connected with hopper pipe or hopper lower section by connecting unit |
Also Published As
Publication number | Publication date |
---|---|
DK0906477T3 (en) | 2002-04-22 |
ES2174261T3 (en) | 2002-11-01 |
PL330600A1 (en) | 1999-05-24 |
DE69711377D1 (en) | 2002-05-02 |
AU3108997A (en) | 1998-01-07 |
DE69711377T2 (en) | 2002-11-07 |
CZ295673B6 (en) | 2005-09-14 |
ATE215154T1 (en) | 2002-04-15 |
PL183744B1 (en) | 2002-07-31 |
EP0906477A1 (en) | 1999-04-07 |
WO1997048859A1 (en) | 1997-12-24 |
NL1003376C2 (en) | 1997-12-23 |
CZ407398A3 (en) | 1999-11-17 |
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