WO2005017272A1 - Procede et systeme de production d'un ouvrage en beton - Google Patents

Procede et systeme de production d'un ouvrage en beton Download PDF

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Publication number
WO2005017272A1
WO2005017272A1 PCT/GB2004/003131 GB2004003131W WO2005017272A1 WO 2005017272 A1 WO2005017272 A1 WO 2005017272A1 GB 2004003131 W GB2004003131 W GB 2004003131W WO 2005017272 A1 WO2005017272 A1 WO 2005017272A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
framework
fabric
channel
concrete structure
Prior art date
Application number
PCT/GB2004/003131
Other languages
English (en)
Inventor
Robert Wallace Shepherd
Tony Black
Original Assignee
Storsack Uk Ltd
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 Storsack Uk Ltd filed Critical Storsack Uk Ltd
Publication of WO2005017272A1 publication Critical patent/WO2005017272A1/fr

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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
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/16—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material
    • E04B1/167—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material with permanent forms made of particular materials, e.g. layered products
    • E04B1/168—Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material with permanent forms made of particular materials, e.g. layered products flexible

Definitions

  • the present invention relates to a method of forming a concrete structure, and in particular it relates to a method of forming concrete foundations, such as keystones and trench foundations.
  • GB 2203477 discloses a method of making a concrete building composed of modules made of light-weight concrete formed in situ around an integral framework.
  • a tubular frame is constructed from pieces of tubing made of perforated paper or plastics, interconnected with junction pieces, and the base of the frame is embedded in a concrete screed.
  • Perforated reinforcing sheets made of paper board (or of plastics or fabric) are attached to the framework and a mould is constructed from cardboard sheets which are spaced from each other by spacers passing through the reinforcements in the reinforcing sheet.
  • Through openings in the top edge of the resultant mould light-weight concrete is poured into the mould and fills it, so that the frame therein becomes an integral part of the concrete, which also flows through the perforations in the reinforcing sheet. After the concrete is dry the moulding sheets are removed.
  • US 3726950 teaches a method for making and/or repairing concrete structural bodies comprising the steps of erecting or providing in situ a fixed matrix means which includes a heavy, openwork wire mesh material; pumping hydraulic cement mortar or grout into a porous- walled bag, so that the bag walls adjacent to the matrix are expanded against the backing of the fixedly maintained wire mesh matrix and further distended into the meshes of the matrix until a small fraction of flowable grout from within the bag means oozes through the porous walls; and thereafter allowing the flowable mortar or grout within the porous bag means to solidify. When the concrete becomes sufficiently hardened the matrix may be removed.
  • US 3726950 has the disadvantage that the wire mesh has to be pre-cut and shaped according to the specific dimensions of the structural body under construction. This means that a significant amount of preparation has to be done before construction can commence.
  • the matrix may be removed, and it can only be automatically re-used to make the same type of structural body. The matrix therefore has to be discarded, cut down to a smaller size for a smaller structural body, or combined with other matrices for a larger structural body.
  • the first option is costly due to the lack of recycling of materials, and the second and third options are labour intensive. Also, the matrix is difficult to handle and clean because of its bulky and complex shape.
  • the present invention overcomes the problems associated with the prior art by providing a method of forming a concrete structure using a framework and a container in which the framework can be re-used to form concrete structures having a range of dimensions.
  • the container is formed of a web of material in the form of fabric or cast sheet.
  • a method of producing a concrete structure comprising: providing a collapsible framework comprising a plurality of supports and joints and a fabric container, the fabric container having means for reversibly attaching the container to the framework; erecting the framework by connecting the supports to one another in a desired configuration using the joints; attaching the container to the framework using the attachment means so that the container and the framework define the shape and dimensions of the concrete structure to be formed; optionally adjusting the framework; filling the container with cementitious material and allowing it to commence hardening so as to form the concrete structure; and removing the framework.
  • a system for producing a concrete structure comprising: a collapsible framework comprising a plurality of supports and joints and a fabric container, the fabric container having means for attaching the container to the framework, wherein the container and the framework together define the shape and dimensions of the concrete structure to be formed.
  • the cementitious material is in a fluid form.
  • the present invention has a number of advantages over the prior art. Firstly, it can be readily assembled in situ by a scaffolder. Secondly, it is infinitely variable because the scaffolding and containers can be selected so as to make a concrete structure of the desired dimensions. Thirdly, after the concrete has been poured into the container and once it has started to harden sufficiently, the scaffolding can be dismantled for use on another part of the construction site, and the excavated earth can be backfilled around the concrete structure to provide support. Earth is back filled around the scaffolding to provide support for the structure before the scaffolding is removed. Fourthly, it is cheap and easy to manufacture and assemble. In use, the scaffolding is also readily adjustable.
  • the fabric container is a bag having an opening for receiving the fluid, cementitious material.
  • the bag may be box-like in shape, for example it may be substantially cuboidal, with at least part of one face of the cube open so as to receive the cementitious material.
  • the cementitious material is preferably in fluid form so it can take the shape of the container easily and without air bubbles or voids forming.
  • the fabric container is a channel.
  • the channel may be substantially U-shaped in cross section.
  • the channel comprises a sheet of fabric preformed so as to have a base and two side members, the channel being capable of being rolled up for storage.
  • Such embodiments have the advantage that they can be readily stored and transported when not in use.
  • Another advantage of the trench container in the form of a channel is that it can be shaped to form a curve. Thus curved keystones can be formed.
  • the preformed sheets of fabric are removed from the roll and rapidly manipulated into the desired shape.
  • the channel is preformed by means of two rows of stitching running parallel to the major axis of the channel. If desirable, a plurality of channels can be arranged with their ends overlapping so that they form an extended, continuous channel.
  • the stitching of the channel material can be arranged so that the side members are in tension or compression relative to the base.
  • the collapsible framework comprises scaffolding poles. This has the advantage that the framework can be readily erected for use and then dismantled after the container has been filled with the fluid, cementitious material and then transported to the next construction site.
  • the fabric container is made of a flexible material, and more preferably a polymer.
  • the polymer is polypropylene.
  • the fibre web should be coated with a waterproof coating to render it impervious to water.
  • Polypropylene has the advantage that it is sufficiently strong to withstand the force of the inflowing cementitious material, and at the same time is sufficiently flexible so as to adopt the required shape.
  • polypropylene is easily fabricated into different shapes, such as bags or channels.
  • coated or laminated polypropylene is non-porous and this has the advantage that it retains moisture in the concrete structure and therefore aids curing.
  • the fabric container is coated with a resin or polymer, preferably polypropylene. The advantage of coating the fabric container is that it improves the moisture retention within the concrete structure and therefore improves the curing process.
  • An important feature of the invention is the provision of eyelets in the polypropylene web.
  • the incorporation of eyelets is problematical since the material is prone to tearing because of a disruption of the web once a hole is formed for the eyelet.
  • the weight of the material is important and should be in the range of 150 - 250 gm "2 .
  • the weight should be approximately 200 gm '2 as this provides the best compromise between weight and strength.
  • a laminated for example 2-ply, material incorporation of attachment means such as eyelets or velcro straps etc can be achieved without loss of strength in the web or without risk of the web tearing.
  • a laminate is used formed from 2 layers of material, preferably polypropylene for both layers, such that the fibre weave or direction in one layer is substantially orthogonal to the fibre weave or direction in the other layer. More than 2 layers could be used and the fibre directions need not be at 90° to each other in successive layers.
  • the attachment means comprises at least one eyelet disposed near to the top edge of the fabric container and a rope, cord or clip that connects the eyelet to the framework.
  • the attachment means comprises at least one hoop disposed near to the top edge of the fabric container, the at least one hoop receiving a part of the framework.
  • the at least one hoop may be formed by folding over the top edge of the fabric container and attaching it to the side of the container.
  • the at least one hoop may be secured by means of stitching, or by means of velcro, for example using velcro straps which can bind to a suitable region on the web forming the container side.
  • velcro for example using velcro straps which can bind to a suitable region on the web forming the container side.
  • the method of the present invention has a number of advantages over existing methods.
  • a scaffolding can be quickly erected thereby increasing the efficiency of the method and reducing the labour cost.
  • the scaffolding can be re-used as soon as the concrete has been poured into the container and this recycling of materials means that costs are reduced and site storage requirements are minimised.
  • the fabric containers are sufficiently strong that the scaffolding can be removed once the concrete has been poured and has started to harden sufficiently. The excavated site can be backfilled whilst the concrete mixture cures and before the scaffolding is removed.
  • Figure 1 shows a collapsable framework and container according to the present invention
  • Figure 2 shows a collapsable framework and container according to the present invention in situ on an excavated site;
  • Figure 3 shows a fabric container according to the present invention.
  • Figure 4 is a schematic showing a channel-type container according to the present invention.
  • the collapsable framework comprises a plurality of supports connected together by joints.
  • the fabric container is in the form of a substantially cuboidal bag/sack having one face open for receiving the cementitious material ie a rectangular parallelepiped structure.
  • the structure need not be rectangular and may be round or irregular in shape.
  • Bag 3 is attached to the support 2 of the collapsable framework 1 by means of a plurality of hoops or eyelets or other method of fixing such as velcro straps which are disposed near to the top edge of the bag 3.
  • the supports 2 can be made of any suitable material, for example wood, plastic or metal, preferably steel.
  • Figure 2 shows a collapsable framework and container system according to the present invention in situ on an excavated site.
  • the container 3 attached to the support 2 of the collapsable framework 1 by means of rope or cord 5 which passes through eyelets formed in container 3 and over support 2.
  • a ramp 6 can be provided so as to enable transfer of the cementitious material from the mixer to the container 3.
  • Figure 3 shows a container 3 having a plurality of eyelets 7 disposed near to the top edge of the fabric container.
  • the eyelet 7 can receive a rope, cord, cable tie, velcro, fine wire (commonly known as steel fixers wire) etc and thereby function as an attachment means to the support 2.
  • the container may be fabricated to the appropriate dimensions according to the particular use. However, typical dimensions for the container are 1.5 metres in length, 1 metre in width and 1 metre in height.
  • the eyelets are 20 mm in diameter and are spaced equidistantly around the top edge of the container 3.
  • the top edge of the container may be folded over so as to provide reinforcement sufficient to withstand the force of the inflowing cementitious material.
  • FIG 4 is a schematic of an embodiment of the invention wherein the fabric container 8 is a channel.
  • a plurality of channels 8 may be rolled up for storage as a bundle 9.
  • bundle 9 is easily stored and transported.
  • the necessary number of channels 8 can be unrolled from bundle 9 and as shown in figure 4 each channel 8 can spontaneously adopt the required substantially u- shaped cross-section as a result of the channels being pre-formed.
  • the container web can be supplied with or without the pre-formed corners.
  • the shape of the container is obtained by taking a flat fabric with eyelets along each edge and suspending it within the supporting structure to gain the shape.
  • Pre-forming of the channels 8 may take the form of two rows of stitching 11 running parallel to the major access of the channel.
  • the corners can be formed by other means such as gluing, ultrasonic welding or other means.
  • the channel is stitched in such a way that it may be partially flattened 8' out in order to be rolled up for storage as bundle 9. Such action places a bias on the channel 8 so that when it is free it naturally tries to adopt a channel that is substantially u-shaped in cross-section.
  • a plurality of the channels 8 may be arranged with their ends overlapping so that they form as extended, continuous channel 10.
  • the length of the channel 10 can be controlled by selecting the appropriate number of individual channels 8.
  • Channels 8 may also have attachment means, for example eyelets disposed near to the top edge of the channel 8, for attaching the channels to a collapsable framework similar to that shown in figures 1 and 2. With the collapsable framework and fabric container in place, the cementitious material may then be poured into the channel so as to form the desired concrete structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Electromagnetism (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Abstract

L'invention concerne un procédé de formation de clefs de voûte au moyen d'une charpente pliable et d'un contenant en tissu, ledit contenant en tissu (3) comprenant un moyen qui permet de l'attacher à la charpente (1).
PCT/GB2004/003131 2003-08-07 2004-07-20 Procede et systeme de production d'un ouvrage en beton WO2005017272A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0318521A GB0318521D0 (en) 2003-08-07 2003-08-07 A method and system for producing a concrete structure
GB0318521.2 2003-08-07

Publications (1)

Publication Number Publication Date
WO2005017272A1 true WO2005017272A1 (fr) 2005-02-24

Family

ID=27839800

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/003131 WO2005017272A1 (fr) 2003-08-07 2004-07-20 Procede et systeme de production d'un ouvrage en beton

Country Status (2)

Country Link
GB (1) GB0318521D0 (fr)
WO (1) WO2005017272A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114892721A (zh) * 2022-04-23 2022-08-12 湖南华纬水电工程有限公司 一种软土地层管廊变形缝防水结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2050257A (en) * 1934-07-18 1936-08-11 Bemis Ind Inc Concrete form
US3726950A (en) * 1970-01-02 1973-04-10 L Turzillo Method for producing sub-aqueous and other cast-in-place concrete structures in situ
EP0107460A2 (fr) * 1982-10-21 1984-05-02 Takao Idehara Procédé pour construire une structure en béton
US4594206A (en) * 1983-09-21 1986-06-10 Grafton Harry D Concrete structures for use in shore protection and/or wave control and method of making same
WO2001098600A1 (fr) * 2000-06-21 2001-12-27 Fearn Richard N Systeme de coffrage d'un mur en beton utilisant des matieres textiles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2050257A (en) * 1934-07-18 1936-08-11 Bemis Ind Inc Concrete form
US3726950A (en) * 1970-01-02 1973-04-10 L Turzillo Method for producing sub-aqueous and other cast-in-place concrete structures in situ
EP0107460A2 (fr) * 1982-10-21 1984-05-02 Takao Idehara Procédé pour construire une structure en béton
US4594206A (en) * 1983-09-21 1986-06-10 Grafton Harry D Concrete structures for use in shore protection and/or wave control and method of making same
WO2001098600A1 (fr) * 2000-06-21 2001-12-27 Fearn Richard N Systeme de coffrage d'un mur en beton utilisant des matieres textiles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114892721A (zh) * 2022-04-23 2022-08-12 湖南华纬水电工程有限公司 一种软土地层管廊变形缝防水结构
CN114892721B (zh) * 2022-04-23 2024-02-02 湖南华纬水电工程有限公司 一种软土地层管廊变形缝防水结构

Also Published As

Publication number Publication date
GB0318521D0 (en) 2003-09-10

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