EP1608822B1 - Method and arrangement for renovating well, and inner casing element of well - Google Patents

Method and arrangement for renovating well, and inner casing element of well Download PDF

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Publication number
EP1608822B1
EP1608822B1 EP04719473A EP04719473A EP1608822B1 EP 1608822 B1 EP1608822 B1 EP 1608822B1 EP 04719473 A EP04719473 A EP 04719473A EP 04719473 A EP04719473 A EP 04719473A EP 1608822 B1 EP1608822 B1 EP 1608822B1
Authority
EP
European Patent Office
Prior art keywords
inner casing
well
casing element
wall
elements
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
EP04719473A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1608822A1 (en
Inventor
Esko HIPPELÄINEN
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.)
NRG Nordic Renovation Group Oy
Original Assignee
NRG Nordic Renovation Group Oy
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 NRG Nordic Renovation Group Oy filed Critical NRG Nordic Renovation Group Oy
Publication of EP1608822A1 publication Critical patent/EP1608822A1/en
Application granted granted Critical
Publication of EP1608822B1 publication Critical patent/EP1608822B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • E02D29/128—Repairs of manhole shafts

Definitions

  • the invention relates to a method for renovating a well, in which method inner casing elements are arranged inside the well in such a manner that said elements form the inner casing of the well and the space between the inner casing and the well is filled with a casting.
  • the invention also relates to an arrangement for renovating a well, the arrangement comprising inner casing elements arranged to form the inner casing of the well and a casting between the well and the inner casing.
  • the invention further relates to an inner casing element of a well, which is intended to be arranged inside the well in such a manner that several inner casing elements form the inner casing of the well.
  • a solution is also known in which a fairly thin plate provided with bulges is arranged into the well, the bulges keeping the plate off the wall of the well to be renovated.
  • a moulding cavity into which concrete is cast, is formed between the plate and the well.
  • the plate has to be very thin. This, in turn, means that the moulding has to be carried out in several stages, since a thin plate does not endure a very heavy cast pressure of concrete.
  • it is extremely laborious and difficult to handle and to mount the plate and also for instance to make the joints to be made into the pipes leading to the drain.
  • WO publication 91/15634 discloses a method for renovating wells.
  • semi-circular ring elements are placed inside the well through an opening. Two elements are attached to one another and the elements are stacked in pairs on top of one another. After this, the space between the well and the ring elements is filled with concrete.
  • it is very difficult to seal the seams between the ring elements. What has proven to be particularly difficult is to provide a tight intersection of the vertical and horizontal seams.
  • the lowest layer of ring elements has to be arranged with the accuracy of a few millimetres to the bottom groove of the well, the slanting bottom, an outlet joint and one or more inlet joints.
  • the lowest layer is to be mounted horizontally in order not to impede the installation of the following layers. In all the installation has proven to be very hard and difficult. The task becomes extremely difficult if the diameter of the inlet or outlet joint exceeds the height of the ring element, in which case the ring element is cut into smaller pieces.
  • a method according to the invention is characterized by forming an inner casing element of the well in such a manner that a continuous ring is formed and that the wall thereof is provided with bending points, flattening the inner casing element for mounting it into the well utilizing the bending points and rounding the inner casing element after being mounted into the well.
  • An arrangement according to the invention is characterized in that the inner casing element forms a continuous ring provided with bending points on the wall thereof so that the ring-shaped element is bendable from a round shape to a flatter shape in order to mount the element into the well.
  • An inner casing element of a well according to the invention is characterized in that the inner casing element forms a continuous ring provided with bending points on the wall thereof so that the ring-shaped element is bendable from a round shape to a flatter shape.
  • An essential idea of the invention is to form the inner casing element of the well so as to form a continuous ring. Furthermore, the element is provided with bending points on the wall thereof so that the ring-shaped element can be bent from a round shape to a flatter shape, whereby the element can be mounted inside the well from an opening in the cover of the well. Inside the well the element is rounded. A required number of ring-shaped elements are mounted on top of one another. The structure of the elements is self-supporting. When the elements have formed a cylindrical structure of desired height, the space between the well to be renovated and the ring elements is cast for instance with fluid concrete.
  • the bending points on the wall of the ring-shaped element are formed by making the thickness of the wall at the particular point thinner than the rest of the crosscut of the element.
  • the bending point is formed such that the direction of the wall at the bending point differs from the direction of the rest of the wall.
  • the invention provides such an advantage that the ring elements are tight as such and that the stack formed of several ring elements can also be made very tight, since the structure comprises only horizontal seams. Also the structure formed by the ring elements is very stiff and solid, and thus endures extremely well the pressure caused by the material to be cast outside it. Above all the installation of the ring elements is simple and easy. In addition, joining the inlet and outlet joints to the ring elements is fairly easy and fast to implement. Several ring elements can be stacked on top of each other, whereby making joints of, for instance, a large diameter is easy even though the diameter of the joint alone would exceed the height of the ring element, since arranging several ring elements on top of one another allow the inner elements to maintain their circular shape even though one layer of elements were to be broken.
  • the ring elements can be manufactured economically in a very simple fashion.
  • the ring elements may for instance almost entirely be made of one material.
  • a structure can easily be formed, in which the inner casing elements placed on top of each other can easily be mounted partly within one another.
  • the shape thereof becomes partly curved, which makes it easier to slide it inside the well.
  • Figure 1 shows an inner casing element 1.
  • the inner casing element 1 is shaped as a continuous ring.
  • the inner casing element 1 is provided with bending points 2, from which a wall of the inner casing element 1 can reasonably easily be bent.
  • the inner casing element 1 is preferably entirely made of plastic, such as polyvinyl chloride PVC, polyethylene PE or cross-linked polyethylene PEX. In view of the handling and bending of the inner casing elements 1, it is particularly advantageous to form the inner casing element 1 of polypropylene PP.
  • the bending points 2 are preferably formed so that the thickness of the wall of the inner casing element 1 is made thinner at the bending points than elsewhere in the element.
  • the inner casing element 1 can easily be made for instance in such a manner that a ring-shaped element equally thick throughout each wall is formed and end cleats and grooves in order to form the bending points 2 are machined into the wall.
  • the inner casing element 1 can also be shaped in a mould for instance by means of rotational moulding, in which case the mould is formed such that the walls of the inner casing element 1 are thinner at the bending points. It is possible to form the inner casing element 1 by means of injection moulding as well. In the simplest form, the inner casing element 1 is thus made of a single material.
  • Figure 2 shows how the inner casing element 1 is being mounted inside a well 3 to be renovated.
  • the inner casing element 1 is provided with bending points 2, whereby the inner casing element 1 is to be flattened from its ring-shaped form to a flatter form in order to fit the inner casing element 1 into the well 3 from an opening 4 in the cover inside the well 3.
  • the element 1 comprises four bending points 2.
  • the element 1 can easily be flattened and when rounded the structure of the element 1 is stiff.
  • the number of bending points may, if desired, also be a different one.
  • the outer diameter of the inner casing element 1 may for instance be 900 millimetres.
  • the element 1 does not therefore have to be supported on the wall of the well 3, but the structure thereof is sufficiently solid to be arranged also for instance inside a rectangular well 3.
  • the height of the inner casing element 1 may in such a case be for instance 300 millimetres.
  • the inner casing element 1 is flattened, it can be mounted for example through such an opening 4, whose diameter ranges for instance between 400 and 500 millimetres.
  • the height of the element 1 is smaller than the diameter of the opening 4 in the cover of the well 3 to be renovated.
  • the element 1 can also be measured such that the height is smaller than half of the diameter thereof.
  • the bottom of the well 3 is at first provided with a plastic layer that takes into account the bottom groove at the bottom of the well, the slanting of the bottom of the well and the pipe joints at the bottom.
  • a first inner casing element 1 is placed inside the well. Since the inner casing element 1 is a continuous ring, it can easily be cut on the ground into a shape that corresponds to the shape of the bottom and the joints, thus reducing the fitting work that is carried out in difficult conditions.
  • the inner casing element 1 is rounded again to resemble a circle. Rounding can be carried out manually or an appropriate tool can be used for rounding.
  • the tool may for instance comprise plates which support the inner casing element on the sides and which are pressed apart using a lever or levers. What can also be used is for instance a tool provided with cylinders or another appropriate solution.
  • the inner casing elements 1 are piled as a cylinder of required height.
  • the cylindrical portion of the well 3 may be for instance 2 to 3 metres high.
  • a stiffer structure is provided when the bending points 2 of the inner casing elements 1 are staggered, i.e. placed in different places.
  • the structure according to the invention is so solid and stiff that the cylindrical bottom part of this size can be cast in one go.
  • a casting that seals and reinforces the structure is thus cast between the well 3 to be renovated and the inner casing elements 1 for instance with fluid concrete 6.
  • Other materials can also be used instead of concrete 6, for example polyurethane foam.
  • Figure 4 shows in crosscut a part of the wall of two inner casing elements 1 placed on top of each other.
  • the walls of the inner casing elements 1 are formed to be corrugated.
  • the thickness of the wall does not have be very large but the structure of the inner casing element 1 still remains very stiff.
  • Such a corrugated inner casing element 1 can be formed for instance using rotational moulding.
  • the inner casing element 1 may also be such that the outer surface thereof is corrugated but the inner surface is smooth.
  • a smooth inner surface can be formed by means of a thin casing plate, for example.
  • Such a thin casing plate can also be formed of a material that is lighter in colour than the rest of the inner casing element 1, in which case the colour of the inner surface of the inner casing element 1 remains light without having to employ expensive colouring agents in the entire structure. If the structure of the inner casing element 1 is to be further strengthened, the space between the casing plate of the inner surface and the corrugated outer surface can be foamed.
  • the corrugated outer surface, the smooth inner surface and the foamed intermediate layer can also be formed in a single stage, for instance using rotational moulding.
  • the lower inner casing element 1 in Figure 4 is crosscut at a bending point 2.
  • the bending point 2 is obviously not provided with corrugations but the wall is straight at that point.
  • the bending point 2 is formed such that the direction of the wall of the element 1 deviates at that point from the direction of the rest of the wall. It is therefore easy to provide a structure, in which the upper inner casing element 1 can be mounted within the lower inner casing element.
  • a space for a seal 7 can easily be provided between the elements. Only the horizontal portion between the inner casing elements 1 has to be sealed in this structure, whereby the seal 7 enables to easily make the cylinder formed of the inner casing elements 1 extremely tight.
  • the inner casing elements 1 are provided with locking claws that allow locking the inner casing elements placed on top of each other together extremely well.
  • the locking claw of the lower inner casing element is pressed tightly against the seal 7, and the joint thus becomes very tight.
  • the inner casing elements 1 placed on top of each other can be joined together for instance using an electric welding joint in a manner known per se.
  • the memory of the material can also be utilized. The portion of the cleat and/or the claw can for instance be bent outwards when mounting the element, whereby the placing of the elements on top of each other becomes easy. Thereafter the elements can be heated, in which case the memory of the material allows placing the cleat and/or the claw in position again and locking the elements placed on top of each other together.
  • the bending point concerned does not bend straight when the inner casing element is being flattened, instead the ring shapes like an arc. Considering the handling of the inner casing element 1, such bending does not, however, provide any significant damage.
  • Such a flattened partly arched inner casing element 1 can be slid into the well even more easily than a completely straight ring in a flattened shape.
  • To shape the direction of the wall of the bending point to be such that it deviates from the direction of the rest of the wall can be formed for instance in a rotational moulding mould.
  • flattening the corrugation at the desired points can form the bending point 2.
  • Flattening can be carried out so that the bending points are provided with a memory for the material from the state, in which the corrugation is not flattened.
  • the bending points can be returned into a shape, in which the corrugation is not flattened, for instance by means of heat. This increases the ring stiffness of the inner casing element placed in position.
  • the well 3 to be renovated is for instance a drain well, such as a sanitary sewer well or rainwater sewer well.
  • the well 3 may be made of round concrete rings, for example.
  • the cross section of the well 3 may also be angular and the well 3 may also be made of bricks, for instance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Hydrology & Water Resources (AREA)
  • Sewage (AREA)
  • Special Spraying Apparatus (AREA)
  • Road Signs Or Road Markings (AREA)
  • Earth Drilling (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
EP04719473A 2003-03-14 2004-03-11 Method and arrangement for renovating well, and inner casing element of well Expired - Lifetime EP1608822B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20030390A FI114232B (fi) 2003-03-14 2003-03-14 Menetelmä ja sovitelma kaivon kunnostamiseksi sekä kaivon sisävuorauselementti
FI20030390 2003-03-14
PCT/FI2004/000141 WO2004081305A1 (en) 2003-03-14 2004-03-11 Method and arrangement for renovating well, and inner casing element of well

Publications (2)

Publication Number Publication Date
EP1608822A1 EP1608822A1 (en) 2005-12-28
EP1608822B1 true EP1608822B1 (en) 2010-03-10

Family

ID=8565814

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04719473A Expired - Lifetime EP1608822B1 (en) 2003-03-14 2004-03-11 Method and arrangement for renovating well, and inner casing element of well

Country Status (7)

Country Link
EP (1) EP1608822B1 (fi)
AT (1) ATE460541T1 (fi)
DE (1) DE602004025912D1 (fi)
FI (1) FI114232B (fi)
NO (1) NO20054242L (fi)
RU (1) RU2327013C2 (fi)
WO (1) WO2004081305A1 (fi)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2206702A1 (de) * 1972-02-12 1973-08-23 Orszagos Koolaj Gazipari Verfahren und profil zum auskleiden von kanaelen, insbesondere zum herstellen von korrosionsbestaendigen schornsteinfuttern
SE454295B (sv) * 1984-11-16 1988-04-18 Josef Guttenkunst Sett att astadkomma en tetning av en befintlig ventilationskanal
US4751799A (en) * 1986-07-09 1988-06-21 A-Lok Product, Inc. Method and apparatus for lining manhole assemblies and the like
FI84384C (fi) * 1990-03-30 1991-11-25 Kwh Pipe Ab Oy Foerfarande foer renovering av brunnar.
JPH07103602B2 (ja) * 1991-06-06 1995-11-08 日本鋼管工事株式会社 マンホ−ルの更生工法
NL1001128C1 (nl) * 1995-09-04 1997-03-05 Jan Frederik Kruse Werkwijze voor het aanbrengen van een voering in een gasafvoerkanaal alsmede kous voor toepassing van de werkwijze.
JP2001248177A (ja) * 2000-03-03 2001-09-14 Sotec:Kk マンホール内面形成材及びそれを用いるマンホールの補修方法

Also Published As

Publication number Publication date
RU2327013C2 (ru) 2008-06-20
FI20030390A0 (fi) 2003-03-14
WO2004081305A8 (en) 2004-12-23
ATE460541T1 (de) 2010-03-15
NO20054242L (no) 2005-12-09
DE602004025912D1 (de) 2010-04-22
WO2004081305A1 (en) 2004-09-23
NO20054242D0 (no) 2005-09-13
EP1608822A1 (en) 2005-12-28
FI114232B (fi) 2004-09-15
RU2005131841A (ru) 2006-04-27

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