EP1246985B1 - Moulage d'un reservoir - Google Patents

Moulage d'un reservoir Download PDF

Info

Publication number
EP1246985B1
EP1246985B1 EP00976521A EP00976521A EP1246985B1 EP 1246985 B1 EP1246985 B1 EP 1246985B1 EP 00976521 A EP00976521 A EP 00976521A EP 00976521 A EP00976521 A EP 00976521A EP 1246985 B1 EP1246985 B1 EP 1246985B1
Authority
EP
European Patent Office
Prior art keywords
concrete
joint
elements
tank
joints
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
EP00976521A
Other languages
German (de)
English (en)
Other versions
EP1246985A1 (fr
Inventor
Ulf Kumlin
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.)
ABETONG TEKNIK AB
Original Assignee
ABETONG TEKNIK AB
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
Priority claimed from SE0000038A external-priority patent/SE522349C2/sv
Application filed by ABETONG TEKNIK AB filed Critical ABETONG TEKNIK AB
Publication of EP1246985A1 publication Critical patent/EP1246985A1/fr
Application granted granted Critical
Publication of EP1246985B1 publication Critical patent/EP1246985B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/02—Containers for fluids or gases; Supports therefor
    • E04H7/18—Containers for fluids or gases; Supports therefor mainly of concrete, e.g. reinforced concrete, or other stone-like material
    • E04H7/20—Prestressed constructions

Definitions

  • the present invention generally relates to casting concrete elements together and particularly to casting prestressed concrete elements together into a tank.
  • Prestressed concrete elements for tanks are described in EP 0514583 (Parenti) and in BFT No. 4/89 "Concrete precasting plant and technology", pages 90-93 by Josef Imkamp.
  • a circular tank, comprising prefabricated concrete elements, is disclosed in DE 3335141.
  • Prestressed concrete elements are normally manufactured in whole parts. When these later are cast together to a tank, which should be able to contain e.g. liquid without leaking, on one hand prestressed cables are used to keep the concrete elements together and on the other hand the joints between the concrete elements are cast together.
  • the pre-stress cables running through the concrete elements are guided through embedded tubes, e.g. plastic tubes.
  • the pre-stress cables need to be protected against corrosion, which among other things implies that they should not have contact with air. In order to protect the pre-stress cables against corrosion they are provided with a plastic cover containing grease.
  • the joint between two concrete elements needs to be shaped to solve several problems. Because the tank is formed of straight concrete elements, the pre-stress cables will, when guided around the tank, risk getting stuck in the joints, unless they are guided straight to the next pipe inlet.
  • the joints between the concrete elements are at assembly not solid in themselves, which they suitably should be, since joint concrete to be cast in the joints is very fluent. If having problems with regular casting of the joints it could be necessary to separately re-cast each joint individually. It is complicated to cast from above and simultaneously get rid of air that could weaken the cast.
  • An object of the present invention is to manufacture a solid tank.
  • Another object of the present invention is to manufacture a tank, where protection against corrosion and mechanical damage of the pre-stress cables is improved.
  • Still another object of the present invention is to manufacture concrete elements with vertical sections facilitating mechanical joint cast from below and up by means of a pump.
  • Yet another object of the present invention is to manufacture a tank with improved structural strength.
  • the embedded tubes guiding the pre-stress cables are also filled with joint concrete when casting the joints.
  • the plastic tubes used to guide the pre-stress cables around the tank inside the concrete elements has a funnel-shaped design at one end in order to easier be able to receive the pre-stress cable in that end when it is guided around the tank.
  • Sealing devices are preferably inserted in the outer parts of the joint in order to prevent the joint concrete from leaking at casting.
  • the cavity or transcend hole positioned at the side of the horizontal tubes and of the track of the pre-stress cable is intended partly for conveying the joint concrete at casting of the tank and partly as a safety channel for manual filling of joint concrete if something should go wrong at the ordinary filling of joint concrete.
  • a tank 100 comprising nineteen concrete elements 103 is shown in Fig. 1. Further, a pump 101 and a pipe line system 102 connected to each joint 1-19 are shown.
  • Each concrete element 103 comprises a plurality of embedded tubes 42, plastic tubes, which are intended to guide pre-stress.cables 43, e.g. steel cables, around the tank 100.
  • the pre-stress cables 43 are used to keep the concrete elements 103 together, when the joints 1-19 are cast together.
  • a method is used, where the filling up of joint concrete is at first filled in joint 1. After a time delay filling of joints 2 and 3 is started and then after still another time delay filling of the joints 4 and 5 starts, and so on until filling of all joints 1-19 with joint concrete has started.
  • the joint concrete is filled from the lower edge of the joints under pressure.
  • a pump 101 and pipe lines 102, for distribution of joint concrete under pressure, are lifted into the tank 100.
  • a system of pipes, Fig. 2 showing a part of the pipe system, for distribution of the joint concrete to the different joints 1-19 is put together so that a first pipe leads from the pump 101 to a three-way fork 20 close to the concrete elements 103.
  • the two subsequent pipes in the three-way fork 20 leads further around the inside of the concrete elements 103.
  • a three-way fork 20 is placed, which leads further around the inside of the concrete elements and into a nozzle in the joint.
  • a valve 21 is placed, e.g. a ball valve or a sliding valve, which is used as a cut-off valve 21 for each respective joint.
  • valves 22 are shown, such as e.g. ball valves, positioned in the pipe system 102 between the respective joint 1-19 and used for time delaying the start of supply of joint concrete into the different joints 1-19.
  • the pump 101 shown in Fig. 1 When the pump 101 shown in Fig. 1 is started and mixing of the joint concrete begins, the pump 101 is disconnected from the pipe system 102, all valves 22 between the respective joint 1-19 is closed and all non-return valves 21 is open.
  • the joint concrete in the pump 101 is of an acceptable quality, the pump 101 is mounted together with the pipe system 102 and the joint concrete is pushed out into the pipe system 102.
  • the joint concrete arrives to a three-way fork 20 and, since the valves 21, 22 are set in such a way, is led to the first joint 1.
  • the joint concrete is led into each joint through an embedded bent pipe.
  • the bent pipe is embedded in the lower edge of the concrete elements 103.
  • the joint concrete fills the joint 1 and the pipes 42, which are used to guide the pre-stress cables 43 to the adjacent concrete elements, and when the joint concrete reaches the upper edge of the joint 1 a float 34, shown in Fig. 3, rises indicating that the first joint 1 is filled.
  • the float 34 is arranged in an upper sealing and is further used to prevent the joint concrete from leaking out.
  • a lower sealing of the joints is effectively obtained if casting is performed around the bottom of the concrete elements, otherwise a temporary sealing has to be obtained, which is performed by inserting a sealing device held up against the bottom of the joint with wedges.
  • each embedded tube is provided with a ventilation pipe 105 at the holes where the pre-stress cables are guided into the concrete elements.
  • the ventilation pipes 105 emerge at the inside of the tank 100.
  • Each ventilation pipe 105 is provided with a cut-off valve, e.g. a ball valve. When the joint concrete comes out through a ventilation pipe 105, it indicates that the pipe is filled and its cut-off valve is closed.
  • An alternative method to bring the air to depart from each embedded tube is to utilize small holes instead of ventilation pipes. With a small hole, having a diameter of approximately 3 mm, air and water will depart from the embedded tubes, while the concrete remains.
  • each respective non-return valve 21 is closed. The closing of the non-return valves 21 takes place with a certain delay. When the joints 2 and 3 have been indicated to be filled, and also the joint 1, the non-return valve 21 at the joint 1 is closed. This prevents the joint concrete form sinking back.
  • Fig. 4 shows a cross-section through a joint between two concrete elements 103.
  • the joint is designed to be able to guide pre-stress cables 43 safely past the joint when the pre-stress cable 43 is led around the tank 100.
  • the pipe 42 guiding the pre-stress cable 43 in the direction towards the insert, out of the joint into the subsequent concrete element, of the pre-stress cable 43 has a funnel, which catches the pre-stress cable 43.
  • the pipe 42 guiding the pre-stress cable into the joint is intended to be aligned with the pipe 42, which guides the pre-stress cable out of the joint. If at the manufacture of a concrete element a pipe ends up a little askew the above-mentioned funnel is especially important, as at the assembly a pre-stress cable therein is not guided straight to the inlet of the next pipe.
  • sealing devices 40 are positioned, e.g. precompressed compress bands or a sealing compound, in the outer parts of the joint and sealing plates are fastened in the upper and lower edges of the joint.
  • This additional sealing device 40 is preferred, since the joint concrete is supplied under pressure.
  • a cavity (transcend hole) 41 is formed beside the paths of the pre-stress cables 43 in order for the joint concrete being able to rise in the joint space and fill out also the pipes 42 with joint concrete (each concrete element has a plurality of pipes 42 distributed on different levels in dependence on the height of the concrete element).
  • the positioning of the transcend hole 41 beside the path of the pre-stress cable is important if a problem should arise during casting.
  • the distance between the concrete elements at the transcend hole 41 is larger than the distance at the pre-stress cable 43, in order to minimize the amount of joint concrete that is needed for casting the tank.
  • the transcend hole 41 preferably has a diameter of approximately 40 mm, for receiving joint concrete from below or refill pipe from above.
  • the distance between the concrete elements at the pre-stress cables is preferably 10-15 mm, which besides minimizes the amount of joint concrete facilitates guiding of pre-stress cables through a joint.
  • the joint has sockets for allowing easy insertion of sealing devices 40, and protruding and respective recessing parts that engage each other that keep the concrete elements positioned during assembly.
  • the protruding and recessing parts are convex respectively concave, which lessen the strain from the pre-stress on the concrete elements.
  • the float 34 used to prevent the joint concrete from emerging out of the upper edge of the joint and used to indicate a filled joint is closer shown in Fig. 3.
  • the float comprises a plastic tube with a sealing 31 at the bottom side, which prevents the joint concrete from leaking through the pipe and instead involving that the pipe rises, when the joint concrete rises to the top in the joint.
  • the air is allowed to be pushed out; it is pushed out by the inpouring joint concrete.
  • the pipe has a sealing ring 33, which seals the space letting out the air, so that the joint concrete will not leak out when it reaches the top of the joint.
  • the sealing ring 33 is kept in place by a container 32.
  • the joint concrete is guided into the concrete elements through only one inlet pipe 23.
  • This pipe preferably guides the joint concrete through joint 1, opposite to the concrete element with the ventilation pipes 105.
  • an additionally coarse embedded tube is utilized in the lowermost part of the concrete elements to allow the joint concrete to easily be spread to all the concrete elements.
  • the joint concrete rises in joints 1-19 in the same manner as has been described above without any valves needing to be opened.
  • This embodiment does not utilize feeding valves except at the only inlet pipe. In the same way as described above ventilation valves are closed as the joints are filled.
  • a non-return valve can e.g. simply be a horizontal lid, which is articulated at the one end and movable upwards from the vertical plane at its other end and also with a stopping device, which prevents the movable part from moving downwards from the vertical plane.
  • the pressure from the pump lifts the lid upwards and if the pressure should be greater from above the lid falls back and prevents the joint concrete from pouring back in the system.
  • the pipe system is built up so that a single person inside the tank could handle it.
  • a three-way fork is positioned and on each further fork another three-way fork is placed.
  • Each further fork has valves, e.g. ball valves, used to control the flow of joint concrete to each separate joint.
  • the filling of joint concrete takes place as according to the embodiment mentioned before but with the difference that the stopping of flow can now be performed with the same valve that opened the flow of the joint concrete.
  • the non-return valves are closed after the entire casting process having been completed and all the joints are filled with joint concrete.
  • a sensor could give a signal, e.g. an electric impulse, to a control unit which further controls the valves, which after a suitable time delay stops further filling of joint concrete. And the same control unit could control the pump and valves to open as well as to close.
  • the concrete elements of the tank are prestressed both vertically and horizontally.
  • Vertically prestressed concrete elements are obtained by molding pre-stress cables into the concrete elements during manufacturing.
  • Horizontally prestressed concrete elements are obtained as described above.
  • By pre-stressing the concrete elements in both horizontal and vertical direction a strongly improved structural strength is achieved. Elements for higher tanks, i.e. longer elements when cast, are more robust when handled.
  • Such vertically prestressed elements are less sensitive to gradient forces, such as temperature differences or horizontal pre-stress.
  • the vertical pre-stress cables are embedded in the concrete elements, while the horizontal pre-stress cables are anchored on one of the concrete elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Making Paper Articles (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Claims (4)

  1. Élément en béton (103) pour un réservoir (100), ledit élément comprenant des tubes horizontaux incorporés (42) disposés de façon à recevoir des câbles de précontrainte (43), dans lequel ledit élément est formé de telle sorte que, lorsque deux éléments sont positionnés côte à côte, un espace de jointure destiné au coulage des deux éléments ensemble est ménagé entre eux,
    caractérisé en ce que
    ledit espace de jointure comprenant une cavité (41) à côté desdits tubes horizontaux (42), pour soulever le béton de jointure et abaisser un tuyau de remplissage, en ce que dans ledit espace de jointure la distance entre les deux éléments en béton étant supérieure au niveau de ladite cavité qu'au niveau desdits tubes horizontaux (42).
  2. Élément en béton selon la revendication 1, dans lequel des dispositifs de scellement (40), de préférence des bandes de compression préalablement comprimées, sont positionnés dans les parties extérieures dudit espace de jointure.
  3. Élément en béton selon la revendication 1 ou 2, dans lequel un côté dudit élément comprend un évidement et un côté opposé dudit élément comprend une partie saillante, lesquels côtés sont formés de telle sorte que, lorsque deux éléments sont positionnés côte à côte, la partie saillante de l'un des éléments s'engage dans l'évidement de l'autre élément.
  4. Réservoir (100) comprenant une pluralité d'éléments en béton (103) coulés ensemble, lesdits éléments en béton étant préalablement étirés verticalement et comportant des tubes incorporés horizontalement (42) contenant des câbles de précontrainte horizontaux (43), lesdits tubes incorporés et les jointures entre les éléments en béton, positionnés côté à côte, étant remplis de béton de jointure, ledit réservoir étant caractérisé en ce que lesdits éléments en béton sont formés de telle sorte que chacune des jointures comporte un espace de jointure rempli de béton et comprenant une cavité (41) à côté desdits tubes horizontaux contenant des câbles de précontrainte (43), dans laquelle ledit béton de jointure a été introduit et, dans chaque espace de jointure rempli de béton, la distance entre deux éléments en béton adjacents est supérieure au niveau de ladite cavité qu'au niveau desdits tubes horizontaux.
EP00976521A 2000-01-10 2000-11-10 Moulage d'un reservoir Expired - Lifetime EP1246985B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE0000038 2000-01-10
SE0000038A SE522349C2 (sv) 2000-01-10 2000-01-10 Sätt och anordning för gjutning av behållare samt en sådan behållare
SE0000686 2000-03-02
SE0000686A SE0000686D0 (sv) 2000-01-10 2000-03-02 Sätt och anordning för gjutning av behållare samt en sådan behållare
PCT/SE2000/002207 WO2001051740A1 (fr) 2000-01-10 2000-11-10 Moulage d'un reservoir

Publications (2)

Publication Number Publication Date
EP1246985A1 EP1246985A1 (fr) 2002-10-09
EP1246985B1 true EP1246985B1 (fr) 2006-01-11

Family

ID=26654938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00976521A Expired - Lifetime EP1246985B1 (fr) 2000-01-10 2000-11-10 Moulage d'un reservoir

Country Status (10)

Country Link
EP (1) EP1246985B1 (fr)
AT (1) ATE315701T1 (fr)
AU (1) AU778554B2 (fr)
DE (1) DE60025521T2 (fr)
EE (1) EE04504B1 (fr)
ES (1) ES2256061T3 (fr)
PL (1) PL206445B1 (fr)
PT (1) PT1246985E (fr)
SE (1) SE0000686D0 (fr)
WO (1) WO2001051740A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2007231C2 (en) * 2011-08-05 2013-02-06 Mecal B V A method of assembling a wall from prefabricated wall parts and a wall assembly.
JP6977927B2 (ja) * 2016-11-28 2021-12-08 株式会社昇和産業 管内掘削具及び管内掘削方法
CN113494180A (zh) * 2020-03-18 2021-10-12 耐当科环境工程河北有限公司 一种装卸方便的滤板模具及其滤板制作方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH658492A5 (de) * 1982-12-13 1986-11-14 Brun Ag Elementwerk Behaelter aus vorgefertigten betonelementen und seine herstellung.
IT1247587B (it) * 1990-04-18 1994-12-28 Giuseppe Parenti Manufatti e metodo per la realizzazione di vasche circolari.
EP0514583B1 (fr) * 1991-05-23 1996-02-14 Giuseppe Parenti bassins circulaires au dessus du sol

Also Published As

Publication number Publication date
DE60025521D1 (de) 2006-04-06
ATE315701T1 (de) 2006-02-15
PL206445B1 (pl) 2010-08-31
PL356330A1 (en) 2004-06-28
SE0000686D0 (sv) 2000-03-02
ES2256061T3 (es) 2006-07-16
EE04504B1 (et) 2005-06-15
DE60025521T2 (de) 2006-08-24
EE200200388A (et) 2003-10-15
EP1246985A1 (fr) 2002-10-09
AU778554B2 (en) 2004-12-09
AU1428401A (en) 2001-07-24
PT1246985E (pt) 2006-05-31
WO2001051740A1 (fr) 2001-07-19

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