EP2350395B1 - Formwork module and method of constructing a foundation - Google Patents

Formwork module and method of constructing a foundation Download PDF

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Publication number
EP2350395B1
EP2350395B1 EP09748511.4A EP09748511A EP2350395B1 EP 2350395 B1 EP2350395 B1 EP 2350395B1 EP 09748511 A EP09748511 A EP 09748511A EP 2350395 B1 EP2350395 B1 EP 2350395B1
Authority
EP
European Patent Office
Prior art keywords
formwork
reinforcement
cage
elements
coupling 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.)
Not-in-force
Application number
EP09748511.4A
Other languages
German (de)
French (fr)
Other versions
EP2350395A1 (en
Inventor
Gijs Willem Schalkwijk
Joost Adrianus Antheunis Huijgen
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.)
Eindhoven Technical University
Original Assignee
Eindhoven Technical University
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 Eindhoven Technical University filed Critical Eindhoven Technical University
Publication of EP2350395A1 publication Critical patent/EP2350395A1/en
Application granted granted Critical
Publication of EP2350395B1 publication Critical patent/EP2350395B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/01—Flat foundations
    • E02D27/02—Flat foundations without substantial excavation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/0056—Means for inserting the elements into the mould or supporting them in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/18—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members for the production of elongated articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/342—Moulds, cores, or mandrels of special material, e.g. destructible materials which are at least partially destroyed, e.g. broken, molten, before demoulding; Moulding surfaces or spaces shaped by, or in, the ground, or sand or soil, whether bound or not; Cores consisting at least mainly of sand or soil, whether bound or not
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/348—Moulds, cores, or mandrels of special material, e.g. destructible materials of plastic material or rubber
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills

Definitions

  • the invention relates to a formwork module for constructing a foundation, comprising:
  • a spacer unit which can be used in a formwork module of this type is known from GB-A-1525708 .
  • This known spacer unit is used for fixing the reinforcement in the formwork and is encased in the formwork.
  • ground beams are prefabricated or made on-site. Both methods have their own specific advantages and drawbacks.
  • the method according to which the ground beams are poured on-site is characterised by a brief preparatory period and a long execution period
  • prefabricated ground beams are characterised by a long preparatory period and a brief execution period.
  • modifications can be realised in a simple manner, as contrasted with prefabricated ground beams.
  • the coupling to other construction elements can be realised in a simpler manner.
  • a formwork module according to the preamble of claim 1 is furthermore known from JP-H-06272378-A .
  • the formwork module according to the invention is as described in claim 1.
  • a foundation can also be poured on-site with all attendant advantages. This is possible because the interconnection elements stop the side walls of the formwork, so that they cannot bend outwards. Since prefabricated formwork modules are used when the foundation is poured, the execution time is short and the execution is not labour-intensive.
  • the known spacer units cannot absorb tensile forces, so that when these spacer units are used the side walls of the formwork are to be safeguarded differently against bending outwards.
  • An aspect of the formwork module according to the invention is that coupling elements to which interconnection elements are coupled are fixed to the side walls of the formwork. As a result, the force exerted by the interconnection elements on the formwork can be distributed more evenly over the length of the formwork. During the pouring operation these side walls are subjected to an outwardly directed force which is caused by the pressure of the concrete.
  • the formwork module preferably further includes a filling element accommodated in the formwork and which is connected to the interconnection elements.
  • interconnection elements are preferably coupled each with a first end portion to the formwork, with a second end portion to the filling element and with a middle portion to the cage of reinforcement.
  • the middle portion must not be movable in vertical direction because otherwise the filling element cannot be retained in place.
  • the invention also relates to a method of constructing a prefabricated formwork module for a foundation, according to claim 4.
  • An embodiment of the method according to the invention is characterised in that two coupling elements are integrated with the formwork, which coupling elements are to be installed in the side walls of the formwork while the interconnection elements are coupled to the formwork by connecting them to the coupling elements.
  • Fig. 1 shows a cross-sectional view of an embodiment of the formwork module according to the invention.
  • the formwork module 1 comprises a formwork 3 which is formed by an extruded EPS (expanded polystyrene) container of a substantially U-shaped cross section provided with a bottom 3a having longitudinally extending grooves and two vertical sidewalls 3b affixed to the bottom.
  • the formwork module further includes a filling element 5 embedded in the formwork, which filling element 5 is formed by an extruded sleeve also made of EPS.
  • the formwork module further includes a cage of reinforcement 7 which is accommodated between the formwork and the filling element, as well as a plurality of interconnection elements 9 of ABS (acrylonitrile butadiene styrene). These interconnection elements are connected with a first end portion 9a via coupling elements to the formwork 3 in such manner that tensile forces can be conveyed. The interconnection elements are further inserted into the filling element 5 with a second end portion 9b and are clamped with their middle portion 9c to the cage of reinforcement 7.
  • ABS acrylonitrile butadiene styrene
  • Extruded coupling elements 11 are attached to the two side walls 3b of the formwork, which coupling elements 11 are connected with their first end portions 9a to the interconnection elements 9.
  • the formwork 3 and the two coupling elements 11 are jointly extruded to one whole as a result of which the coupling elements are rigidly attached to the formwork.
  • the sectional views of the formwork 3 and the filling element 5 are identical for all applications of the formwork module. Only the cage of reinforcement 7 differs for each application. The strength of the cage of reinforcement 7 is adapted to the required strength of the foundation.
  • the cage of reinforcement 7 is comprised of longitudinally extending rods 7a and holder rods 7b fixed thereto and transversely arranged relative to the longitudinally extending rods 7a to which holder rods the interconnection elements 9 are clamped with their middle portion 9c.
  • the cage of reinforcement 7 and the interconnection elements 9 jointly hold the side walls 3b of the formwork together, so that the formwork kan withstand the pressure of the concrete during the pouring of the concrete.
  • the cage of reinforcement 7 and the interconnection elements 9 keep the filling element 5 in place, so that this is not floating upwardly by the upward force of the concrete during the pouring of the concrete.
  • the interconnection elements are inserted into the filling element for example with their two end portions. This connection is sufficient because it is not burdened by tensile load.
  • Figs. 2 and 3 show the interconnection element 9 of the formwork module in side view and top view respectively.
  • the side view of the first end portion 9a of the interconnection element shows the shape of the tip of an arrow that is received by the coupling element as a result of which this connection can vonvey tensile forces.
  • the side view of the second end portion 9b of the interconnection element shows a sawtooth-like profile of which the teeth function as barbs when the interconnection element is inserted into the filling element.
  • the middle portion 9c of the interconnection element 9 is formed by a strip 9c having an omega-shaped cross section, as well as a slide 9d.
  • the strip 9c can be clamped around a wire of the cage of reinforcement as a result of the shape of the strip. By subsequently moving the slide 9d over the middle portion 9c, the wire of the cage of reinforcement is secured.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Foundations (AREA)

Description

    Field of the invention.
  • The invention relates to a formwork module for constructing a foundation, comprising:
    • a formwork comprised of a bottom and two vertical side walls fixed to the bottom, as well as
    • a cage of reinforcement accommodated in the formwork, and
    • interconnection elements which are coupled to the formwork and are fixed to the cage of reinforcement.
    State of the art.
  • A spacer unit which can be used in a formwork module of this type is known from GB-A-1525708 . This known spacer unit is used for fixing the reinforcement in the formwork and is encased in the formwork.
  • In present-day construction practice the ground beams are prefabricated or made on-site. Both methods have their own specific advantages and drawbacks. For example, the method according to which the ground beams are poured on-site is characterised by a brief preparatory period and a long execution period, whereas prefabricated ground beams are characterised by a long preparatory period and a brief execution period. When ground beams are poured on-site, modifications can be realised in a simple manner, as contrasted with prefabricated ground beams. Furthermore, when ground beams are poured on-site, the coupling to other construction elements can be realised in a simpler manner. A formwork module according to the preamble of claim 1 is furthermore known from JP-H-06272378-A .
    • Summary of the invention.
  • It is an object of the invention to provide a formwork module with which ground beams can be poured on-site and advantages of the two known methods are there but the drawbacks are not. To this end the formwork module according to the invention is as described in claim 1. With a formwork module according to the invention a foundation can also be poured on-site with all attendant advantages. This is possible because the interconnection elements stop the side walls of the formwork, so that they cannot bend outwards. Since prefabricated formwork modules are used when the foundation is poured, the execution time is short and the execution is not labour-intensive. The known spacer units cannot absorb tensile forces, so that when these spacer units are used the side walls of the formwork are to be safeguarded differently against bending outwards.
  • An aspect of the formwork module according to the invention is that coupling elements to which interconnection elements are coupled are fixed to the side walls of the formwork. As a result, the force exerted by the interconnection elements on the formwork can be distributed more evenly over the length of the formwork. During the pouring operation these side walls are subjected to an outwardly directed force which is caused by the pressure of the concrete.
  • The formwork module preferably further includes a filling element accommodated in the formwork and which is connected to the interconnection elements.
  • Furthermore, the interconnection elements are preferably coupled each with a first end portion to the formwork, with a second end portion to the filling element and with a middle portion to the cage of reinforcement. The middle portion must not be movable in vertical direction because otherwise the filling element cannot be retained in place. By clamping the filling element to the cage of reinforcement shifting of the filling element is avoided.
  • The invention also relates to a method of constructing a prefabricated formwork module for a foundation, according to claim 4. An embodiment of the method according to the invention is characterised in that two coupling elements are integrated with the formwork, which coupling elements are to be installed in the side walls of the formwork while the interconnection elements are coupled to the formwork by connecting them to the coupling elements.
    • Brief description of the drawings.
  • The invention will be described in more detail based on an example of embodiment of the formwork module according to the invention shown in the drawings while reference is made to the appended drawing figures, in which:
    • Fig. 1 shows a cross-sectional view of an embodiment of the formwork module according to the invention;
    • Fig. 2 shows a side view of an interconnection element of the formwork module; and
    • Fig. 3 shows a top view of the interconnection element.
    Detailed description of the drawings.
  • Fig. 1 shows a cross-sectional view of an embodiment of the formwork module according to the invention. The formwork module 1 comprises a formwork 3 which is formed by an extruded EPS (expanded polystyrene) container of a substantially U-shaped cross section provided with a bottom 3a having longitudinally extending grooves and two vertical sidewalls 3b affixed to the bottom. The formwork module further includes a filling element 5 embedded in the formwork, which filling element 5 is formed by an extruded sleeve also made of EPS. The formwork module further includes a cage of reinforcement 7 which is accommodated between the formwork and the filling element, as well as a plurality of interconnection elements 9 of ABS (acrylonitrile butadiene styrene). These interconnection elements are connected with a first end portion 9a via coupling elements to the formwork 3 in such manner that tensile forces can be conveyed. The interconnection elements are further inserted into the filling element 5 with a second end portion 9b and are clamped with their middle portion 9c to the cage of reinforcement 7.
  • Extruded coupling elements 11 are attached to the two side walls 3b of the formwork, which coupling elements 11 are connected with their first end portions 9a to the interconnection elements 9. The formwork 3 and the two coupling elements 11 are jointly extruded to one whole as a result of which the coupling elements are rigidly attached to the formwork.
  • The sectional views of the formwork 3 and the filling element 5 are identical for all applications of the formwork module. Only the cage of reinforcement 7 differs for each application. The strength of the cage of reinforcement 7 is adapted to the required strength of the foundation.
  • The cage of reinforcement 7 is comprised of longitudinally extending rods 7a and holder rods 7b fixed thereto and transversely arranged relative to the longitudinally extending rods 7a to which holder rods the interconnection elements 9 are clamped with their middle portion 9c. The cage of reinforcement 7 and the interconnection elements 9 jointly hold the side walls 3b of the formwork together, so that the formwork kan withstand the pressure of the concrete during the pouring of the concrete. Furthermore, the cage of reinforcement 7 and the interconnection elements 9 keep the filling element 5 in place, so that this is not floating upwardly by the upward force of the concrete during the pouring of the concrete. The interconnection elements are inserted into the filling element for example with their two end portions. This connection is sufficient because it is not burdened by tensile load.
  • Figs. 2 and 3 show the interconnection element 9 of the formwork module in side view and top view respectively. The side view of the first end portion 9a of the interconnection element shows the shape of the tip of an arrow that is received by the coupling element as a result of which this connection can vonvey tensile forces. The side view of the second end portion 9b of the interconnection element shows a sawtooth-like profile of which the teeth function as barbs when the interconnection element is inserted into the filling element.
  • The middle portion 9c of the interconnection element 9 is formed by a strip 9c having an omega-shaped cross section, as well as a slide 9d. The strip 9c can be clamped around a wire of the cage of reinforcement as a result of the shape of the strip. By subsequently moving the slide 9d over the middle portion 9c, the wire of the cage of reinforcement is secured.
  • Albeit the invention has been described in the foregoing with reference to the drawings, it should be pointed out that the invention is not by any manner or means restricted to the embodiments shown in the drawings. The invention also extends over any embodiment deviating from the embodiment shown in the drawing Figures within the scope defined by the claims.

Claims (5)

  1. A formwork module for constructing a foundation, comprising:
    - a formwork (3) comprised of a bottom (3a) and two vertical side walls (3b) fixed to the bottom (3a), as well as
    - a cage of reinforcement (7) accommodated in the formwork (3), the cage of reinforcement (7) comprising a number of longitudinally extending rods (7a) and holder rods (7b) fixed thereto and transversely arranged relative to the longitudinally extending rods (7a), and
    - coupling elements (11) which are fixed to two opposing inner sides (3c) of the side walls of the formwork (3), and
    - interconnection elements (9) which are coupled to the coupling elements (11) in the formwork, characterized in that the interconnection elements (9) are clamped with their middle portion (9c) to vertical parts of the holder rods (7b) of the cage of reinforcement (7), wherein during pouring of the concrete the coupling elements (11) and the interconnection elements (9) convey tensile forces between the cage of reinforcement (7) and the formwork (3), thereby preventing the sides walls (3b) of the formwork (3) from bending outward.
  2. A formwork module as claimed in claim 1, characterised in that the formwork module further includes a filling element (5) accommodated in the formwork (3) and which is connected to the interconnection elements (9).
  3. A formwork module as claimed in claim 2, characterised in that the interconnection elements (9) are coupled each with a first end portion (9a) to the formwork (3), with a second end portion (9b) to the filling element (5) and with a middle portion (9c) to the cage of reinforcement (7).
  4. A method of constructing a prefabricated formwork module for a foundation, comprising:
    - constructing a formwork (3) comprised of a bottom (3a) and two side walls (3b) fixed to the bottom (3a), as well as
    - fixing coupling elements (11) to two opposing inner sides (3c) of the side walls (3b) of the formwork (3), and
    - constructing a cage of reinforcement (7), the cage of reinforcement (7) comprising a number of longitudinally extending rods (7a) and holder rods (7b) fixed thereto and transversely arranged relative to the longitudinally extending rods (7a), and
    - inserting the cage of reinforcement (7) into the formwork (3), characterised by:
    - coupling the formwork (3) and the cage of reinforcement (7) by means of interconnection elements (9), each of which are coupled to one of the coupling elements (11) and clamped with their middle portion (9c) to a vertical part of one of the holder rods (7b) of the cage of reinforcement (7), wherein during pouring of the concrete the coupling elements (11) and the interconnection elements (9) convey tensile forces between the cage of reinforcement (7) and the formwork (3), thereby preventing the sides walls (3b) of the formwork (3) from bending outward.
  5. A method as claimed in claim 4, characterised in that the coupling elements (11) are integrated with the formwork (3), which coupling elements (11) are to be installed in the side walls (3b) of the formwork (3).
EP09748511.4A 2008-10-29 2009-10-29 Formwork module and method of constructing a foundation Not-in-force EP2350395B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2002150A NL2002150C (en) 2008-10-29 2008-10-29 SHAPING MODULE AND METHOD FOR MANUFACTURING A FOUNDATION.
PCT/NL2009/050652 WO2010050810A1 (en) 2008-10-29 2009-10-29 Formwork module and method of constructing a foundation

Publications (2)

Publication Number Publication Date
EP2350395A1 EP2350395A1 (en) 2011-08-03
EP2350395B1 true EP2350395B1 (en) 2018-05-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09748511.4A Not-in-force EP2350395B1 (en) 2008-10-29 2009-10-29 Formwork module and method of constructing a foundation

Country Status (3)

Country Link
EP (1) EP2350395B1 (en)
NL (1) NL2002150C (en)
WO (1) WO2010050810A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015112721A1 (en) * 2014-09-03 2016-03-03 Edgar Klug Process for the production of concrete moldings
CN105862894B (en) * 2016-04-06 2018-02-02 中国十七冶集团有限公司 A kind of installation method of catch pit anti-floating integral mold plate
CN106759415A (en) * 2017-03-14 2017-05-31 中国十七冶集团有限公司 A kind of concrete structure catch pit template anti-floating control technology

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1525708A (en) * 1976-02-25 1978-09-20 Marley Buildings Ltd Plastics link-spacer for holding metal reinforcement rods in a mould
JPS55159072A (en) * 1979-05-29 1980-12-10 Masayuki Kida Method of constructing reinforced concrete structure
JPH06272378A (en) * 1993-03-23 1994-09-27 Shimizu Corp Supporting structure for precast concrete form
NL1029468C2 (en) * 2005-07-08 2007-01-09 Betonson B V Method for preparing pile for building, involves pouring concrete into mold arranged with polystyrene foam such that foam is enclosed by concrete, and curing concrete, partially

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2010050810A1 (en) 2010-05-06
NL2002150C (en) 2010-05-03
EP2350395A1 (en) 2011-08-03

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