EP3312359A1 - Mold element - Google Patents

Mold element Download PDF

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Publication number
EP3312359A1
EP3312359A1 EP17194993.6A EP17194993A EP3312359A1 EP 3312359 A1 EP3312359 A1 EP 3312359A1 EP 17194993 A EP17194993 A EP 17194993A EP 3312359 A1 EP3312359 A1 EP 3312359A1
Authority
EP
European Patent Office
Prior art keywords
side walls
feet
mold element
steel bar
bar mesh
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.)
Granted
Application number
EP17194993.6A
Other languages
German (de)
French (fr)
Other versions
EP3312359B1 (en
Inventor
Reijo Jokinen
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.)
Beotek Oy
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Beotek 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 Beotek Oy filed Critical Beotek Oy
Priority to PL17194993T priority Critical patent/PL3312359T3/en
Publication of EP3312359A1 publication Critical patent/EP3312359A1/en
Application granted granted Critical
Publication of EP3312359B1 publication Critical patent/EP3312359B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional [3D] extent, e.g. lattice girders
    • E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
    • E04C5/0622—Open cages, e.g. connecting stirrup baskets
    • 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
    • E02D27/08—Reinforcements for flat foundations
    • 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
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements

Definitions

  • the invention relates to a mold element for foundation molds of buildings, the mold element comprising a coarse-meshed steel bar mesh which is manufactured of steel bars, the steel bars being fixed to each other at cross-over points thereof, the steel bar mesh being designed as an elongated gutter which has a bottom and side walls and feet between the bottom and side walls, the feet being formed of bended steel bars of the steel bar mesh, and in addition, the side walls are provided with wall material which retains the concrete casting.
  • the mold element includes a coarse-meshed steel bar mesh which is made of crosswise steel rods 2 and lengthwise steel rods 3, the steel bars being fixed to each other at cross-over points thereof, the steel bar mesh being designed as an elongated gutter.
  • the gutterlike steel rod mesh has a bottom 1 and side walls 5 and feet 4 between the bottom and side walls, the feet being formed of bended steel bars 2 of the steel bar mesh, and in addition, the side walls are provided with wall material which retains the concrete casting.
  • the concrete casting retaining wall material is made up of plastic foils 6, which have been laminated on both sides of the steel bar mesh.
  • the plastic foils are attached to each other in the areas of steel bar mesh openings at the area of side walls 5 and feet 4, extending under the feet bottom.
  • the concrete casting retaining wall material is made up of insulating boards 7 which are placed against inner surfaces of the side walls 5. This construction is used when heat insulation is needed.
  • the bottom of the mold element must be wide enough, in order to provide a load bearing support against the soil.
  • the distance between the side walls is typically for instance 60 cm.
  • the base to be placed on the foundation is, however, substantially narrower. Load from the constructions on the base is transmitted via the base to the foundation, where the load supporting counter forces are formed between the base and the bottom of the foundation. Significance of border areas in the upper portion of the foundation is so tiny that the concrete mass used therefore is in waste use. In the present invention this problem is avoided because the side walls 5 approach each other when going from feet 5 upwards towards upper edges of the side walls, the angle of approach being in the area of 3 - 45 degrees separately for each wall. Typically the said angle is 10 - 40 degrees. This inclination of side walls is made by bends of steel rods of the feet 4. These bends i.e. inclination of side walls can be made before attachment of the plastic foils or thereafter.
  • the weight of the concrete mass casted in the mold element is directed to the side walls 5 and tends to turn them outwards by bending the crosswise steel rods 2 particularly at the areas of the bending arches of the feet 4. Outwards bending of the walls have been prevented by supporting the walls from outside or by binding them together. If the supporting is not performed, then also unnecessary extra consumption of concrete mass is caused.
  • the bends of feet are slightly over-bended, in order that the side walls 5 approach each other slightly more than their desired final position after the concrete casting of the foundation. When going from feet 4 upwards towards upper edges of the side walls, this extra angle of approach is a few degrees separately for each wall.
  • the bending angle of the side walls is in its maximum so large that the minimum distance between the upper edges of the side walls corresponds to the width of the base.
  • the angle of side walls relative to the normal of bottom plane is 3 - 45 degrees, in other words, in the angle of 87 - 45 degrees relative to the bottom plane.
  • the said angle is 10 - 40 degrees (in other words, 80-50 degrees relative to the bottom plane).
  • the stiffness of the used steel rods 2 is sufficient to resist the outwards bending of the walls such that when the mold is filled by casting, the angle between the walls is widened only a few degrees in comparison to an empty mold element. Thereby supporting of walls and extra consumption of concrete mass can be avoided.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

Mold element for foundation molds of buildings The mold element comprises a coarse-meshed steel bar mesh which is manufactured of steel bars (2, 3). The steel bars (2, 3) are fixed to each other at cross-over points thereof and the steel bar mesh is designed as an elongated gutter which has a bottom (1) and side walls (5) and feet (4) between the bottom and side walls. The feet are formed of bended steel bars (2) of the steel bar mesh In addition, the side walls are provided with wall material which retains the concrete casting. The side walls (5) approach each other when going in direction upwards from feet (4) towards upper edges of the side walls, the angle of approach being in the area of 3 - 45 degrees separately for each wall.

Description

  • The invention relates to a mold element for foundation molds of buildings, the mold element comprising a coarse-meshed steel bar mesh which is manufactured of steel bars, the steel bars being fixed to each other at cross-over points thereof, the steel bar mesh being designed as an elongated gutter which has a bottom and side walls and feet between the bottom and side walls, the feet being formed of bended steel bars of the steel bar mesh, and in addition, the side walls are provided with wall material which retains the concrete casting.
  • This kind of mold element is prior known from utility model DE-U1-29700133 from year 1997. In addition, from patent publication FI 125417 B is prior known a method for laminating plastic foils onto the walls of this kind of mold element. One problem with these mold elements is the need to support the walls against the pressure caused by the concrete casting. Without support, the walls slightly descend from each other, which causes unnecessary spending of concrete mass. Another problem is that the border areas of the foundation which is substantially wider than the base on the foundation, do not actually participate to bear the load coming on the base, whereby the concrete at said border areas is in waste use.
  • The invention aims to resolve these problems with improved construction of the mold element. This aim is reached according to the features of the attached claim 1. In dependent claims there are presented advantageous embodiments of the invention.
  • The invention is described in the following by reference to the enclosed drawings, wherein
    • Figure 1
    shows a cross section of the mold element according to the first embodiment of the invention, and
    Figure 2
    shows a cross section of the mold element according to the second embodiment of the invention.
  • The mold element includes a coarse-meshed steel bar mesh which is made of crosswise steel rods 2 and lengthwise steel rods 3, the steel bars being fixed to each other at cross-over points thereof, the steel bar mesh being designed as an elongated gutter. The gutterlike steel rod mesh has a bottom 1 and side walls 5 and feet 4 between the bottom and side walls, the feet being formed of bended steel bars 2 of the steel bar mesh, and in addition, the side walls are provided with wall material which retains the concrete casting.
  • In the embodiment of figure 1 the concrete casting retaining wall material is made up of plastic foils 6, which have been laminated on both sides of the steel bar mesh. The plastic foils are attached to each other in the areas of steel bar mesh openings at the area of side walls 5 and feet 4, extending under the feet bottom. When the plastic foils 6, laminated against each other, extend past the lowest point of the feet to the bottom side faces of the feet, the mold element becomes sturdier and sinking of feet into the soil is avoided, whereby the bottom steel rods of the mold element remain high enough and within the concrete casting. In addition, discharge of the concrete casting underneath the lower edge of the wall is prevented.
  • In the embodiment of figure 2 the concrete casting retaining wall material is made up of insulating boards 7 which are placed against inner surfaces of the side walls 5. This construction is used when heat insulation is needed.
  • The bottom of the mold element must be wide enough, in order to provide a load bearing support against the soil. The distance between the side walls is typically for instance 60 cm. The base to be placed on the foundation is, however, substantially narrower. Load from the constructions on the base is transmitted via the base to the foundation, where the load supporting counter forces are formed between the base and the bottom of the foundation. Significance of border areas in the upper portion of the foundation is so tiny that the concrete mass used therefore is in waste use. In the present invention this problem is avoided because the side walls 5 approach each other when going from feet 5 upwards towards upper edges of the side walls, the angle of approach being in the area of 3 - 45 degrees separately for each wall. Typically the said angle is 10 - 40 degrees. This inclination of side walls is made by bends of steel rods of the feet 4. These bends i.e. inclination of side walls can be made before attachment of the plastic foils or thereafter.
  • The weight of the concrete mass casted in the mold element is directed to the side walls 5 and tends to turn them outwards by bending the crosswise steel rods 2 particularly at the areas of the bending arches of the feet 4. Outwards bending of the walls have been prevented by supporting the walls from outside or by binding them together. If the supporting is not performed, then also unnecessary extra consumption of concrete mass is caused. In the present invention the bends of feet are slightly over-bended, in order that the side walls 5 approach each other slightly more than their desired final position after the concrete casting of the foundation. When going from feet 4 upwards towards upper edges of the side walls, this extra angle of approach is a few degrees separately for each wall. The bending angle of the side walls is in its maximum so large that the minimum distance between the upper edges of the side walls corresponds to the width of the base.
  • When the bottom 1 between the feet 4 is planar, then, for the above mentioned reasons, the angle of side walls relative to the normal of bottom plane is 3 - 45 degrees, in other words, in the angle of 87 - 45 degrees relative to the bottom plane. Typically, the said angle is 10 - 40 degrees (in other words, 80-50 degrees relative to the bottom plane). Typically, the stiffness of the used steel rods 2 is sufficient to resist the outwards bending of the walls such that when the mold is filled by casting, the angle between the walls is widened only a few degrees in comparison to an empty mold element. Thereby supporting of walls and extra consumption of concrete mass can be avoided.

Claims (4)

  1. Mold element for foundation molds of buildings, the mold element comprising a coarse-meshed steel bar mesh which is manufactured of steel bars (2, 3), the steel bars (2, 3) being fixed to each other at cross-over points thereof, the steel bar mesh being designed as an elongated gutter which has a bottom (1) and side walls (5) and feet (4) between the bottom and side walls, the feet being formed of bended steel bars (2) of the steel bar mesh, and in addition, the side walls are provided with wall material which retains the concrete casting, characterized in that the side walls (5) approach each other when going in direction upwards from feet (4) towards upper edges of the side walls, the angle of approach being in the area of 3 - 45 degrees separately for each wall.
  2. Mold element according to claim 1, characterized in that the concrete casting retaining wall material is made up of plastic foils (6), which have been laminated on both sides of the steel bar mesh and are attached to each other in the areas of steel bar mesh openings at the area of side walls (5) and feet (4), extending under the feet bottom.
  3. Mold element according to claim 1, characterized in that the concrete casting retaining wall material is made up of insulating boards (7) which are placed against inner surfaces of the side walls (5).
  4. Mold element according to claim 1 or 2, characterized in that the bottom (1) between the feet (4) is planar and that the angle of side walls relative to the normal of bottom plane is 3 - 45 degrees.
EP17194993.6A 2016-10-19 2017-10-05 Mold element Active EP3312359B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17194993T PL3312359T3 (en) 2016-10-19 2017-10-05 Mold element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20164206 2016-10-19

Publications (2)

Publication Number Publication Date
EP3312359A1 true EP3312359A1 (en) 2018-04-25
EP3312359B1 EP3312359B1 (en) 2019-11-06

Family

ID=60037417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17194993.6A Active EP3312359B1 (en) 2016-10-19 2017-10-05 Mold element

Country Status (3)

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EP (1) EP3312359B1 (en)
DK (1) DK3312359T3 (en)
PL (1) PL3312359T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4036315A1 (en) * 2020-12-31 2022-08-03 Krzysztof Zwierz Construction system for footings and foundation walls, especially in the lost formwork system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815870C1 (en) * 1988-05-09 1989-08-03 Peca-Verbundtechnik Gmbh, 8312 Dingolfing, De
DE29700133U1 (en) 1997-01-07 1997-02-20 Jokinen, Reijo, Helsinki Foundation reinforcement
FR2777923A1 (en) * 1998-04-22 1999-10-29 Philippe Blanc Foundation module that is prefabricated
EP1837164A2 (en) * 2006-03-23 2007-09-26 Lammi-Perustus Oy Method and apparatus for applying plastic sheets to the walls of a foundation mould element
DE202007008977U1 (en) * 2007-06-27 2008-10-30 Reent Obernolte Gmbh & Co. Kg An element
FI125417B (en) 2014-06-12 2015-10-15 Beotek Oy Method and apparatus for attaching plastic films to the sidewalls of the molding element of a concrete casting foundation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815870C1 (en) * 1988-05-09 1989-08-03 Peca-Verbundtechnik Gmbh, 8312 Dingolfing, De
DE29700133U1 (en) 1997-01-07 1997-02-20 Jokinen, Reijo, Helsinki Foundation reinforcement
FR2777923A1 (en) * 1998-04-22 1999-10-29 Philippe Blanc Foundation module that is prefabricated
EP1837164A2 (en) * 2006-03-23 2007-09-26 Lammi-Perustus Oy Method and apparatus for applying plastic sheets to the walls of a foundation mould element
DE202007008977U1 (en) * 2007-06-27 2008-10-30 Reent Obernolte Gmbh & Co. Kg An element
FI125417B (en) 2014-06-12 2015-10-15 Beotek Oy Method and apparatus for attaching plastic films to the sidewalls of the molding element of a concrete casting foundation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4036315A1 (en) * 2020-12-31 2022-08-03 Krzysztof Zwierz Construction system for footings and foundation walls, especially in the lost formwork system

Also Published As

Publication number Publication date
PL3312359T3 (en) 2020-04-30
DK3312359T3 (en) 2020-01-27
EP3312359B1 (en) 2019-11-06

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