EP0171422A1 - A sliding form for casting columns - Google Patents

A sliding form for casting columns

Info

Publication number
EP0171422A1
EP0171422A1 EP19850900986 EP85900986A EP0171422A1 EP 0171422 A1 EP0171422 A1 EP 0171422A1 EP 19850900986 EP19850900986 EP 19850900986 EP 85900986 A EP85900986 A EP 85900986A EP 0171422 A1 EP0171422 A1 EP 0171422A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
steel cylinder
sliding form
sliding
steel
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.)
Withdrawn
Application number
EP19850900986
Other languages
German (de)
French (fr)
Inventor
Jes Pallesen
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.)
AS PHONIX CONTRACTORS
Original Assignee
AS PHONIX CONTRACTORS
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 AS PHONIX CONTRACTORS filed Critical AS PHONIX CONTRACTORS
Publication of EP0171422A1 publication Critical patent/EP0171422A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
    • E04G21/063—Solidifying concrete, e.g. by application of vacuum before hardening making use of vibrating or jolting tools
    • E04G21/065—Solidifying concrete, e.g. by application of vacuum before hardening making use of vibrating or jolting tools acting upon the shuttering
    • 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
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E04G11/20—Movable forms; Movable forms for moulding cylindrical, conical or hyperbolical structures; Templates serving as forms for positioning blocks or the like
    • E04G11/22—Sliding forms raised continuously or step-by-step and being in contact with the poured concrete during raising and which are not anchored in the hardened concrete; Arrangements of lifting means therefor
    • 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
    • E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
    • E04G13/021—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor for circular columns

Definitions

  • the invention relates to a sliding form for casting columns by placing a dry mix concrete in the form, e.g. about a steel pipe, and whereby the sliding form is preferably to be suspended in a carrying platform dis- placeably situated in a supporting structure, said slid ⁇ ing form comprising a steel cylinder with vibrators . mounted thereon.
  • sliding forms slip form
  • the sliding form used surrounds the object to be cast and is usually of a dimension of 1 - 1.5 m.
  • the casting is initiated with the form in the bottom position, but after a period of 3 to 4 hours, i.e. when the form is filled with concrete, the raising of the form is started along with the filling in of poured concrete in such a manner that the form is always filled up.
  • the raising speed is typically 30 cm per hour, which in connection with a sliding form height as stated means that as the form is raised the concrete laid open below said form is 4 to 5 hours old and consequently set.
  • the form is usually raised by means of hydraulic jacks with grips "climbing" round bars cast into the concrete.
  • the concrete used is of a plastic consistency, and the neces ⁇ sary compressing is carried out by means of poker vibra ⁇ tors put down into the upper 30-40 cm thick layer of poured concrete.
  • the sliding form is mounted so as to allow a "slip", i.e. the form walls are inclined, the lower wall edge being bent 0,5 - 1.0 cm backwards away from the concrete surface produced in order to reduce the friction between the form and the concrete while said form is sliding upwards.
  • US patent specification No. 3,468,001 discloses a slid ⁇ ing form for casting columns and formed as a steel cylin ⁇ der.
  • the diameter of the steel cylinder is constant to- wards the lower edge, and consequently it allows no slip.
  • a vibrator is mounted on the wall of the form in such a manner that the form can be used for a relatively dry mixture of concrete and run at an increased sliding speed.
  • Such a sliding form for casting columns does not, however, run completely satisfactorily because heavy vibrations arise at the lower edge of the steel cylinder when the vibrator is running, said heavy vibrations causing serious pits in the surface of the concrete immediately below the steel cylinder.
  • a satisfactory running of the steel cylinder requires a prior displacement (sliding) thereof relative to the concrete when the latter has been set.
  • the concrete may not be able to retain its shape in spite of the fact that it is of a consistency as moist earth.
  • the object of the invention is to provide a sliding form for casting columns of the above type which allows a sliding of the form at a sliding rate many times greater than previously possible.
  • the sliding form according to the invention is charac ⁇ terised in that the vibrators are preferably electro-mag ⁇ netic and situated diametrically opposite one another and furthermore adapted so as to operate in opposition, and that the lower end of the steel cylinder is rela ⁇ tively rigid, said lower end being provided with a sleeve of vibration-absorbin ⁇ material such as rubber.
  • the concrete produced is nondeform imme ⁇ diately upon the compressing.
  • the reinforcement of the lower end of the steel cylinder implies that the vibra ⁇ tions at the lower edge of the steel cylinder are so insignificant that they do not damage the shape of the free concrete.
  • the vibration-absorbing sleeve supports the free concrete below the lower edge of the steel cyl ⁇ inder without transferring the vibrations to the con ⁇ crete at said edge.
  • the sleeve supports the concrete just placed by the steel cylinder and thereby assists the concrete in maintain- ing its shape.
  • the placed concrete is far from being set. Such a procedure allows a sliding rate of the slid ⁇ ing form which is many times greater than previously possible.
  • the sliding form may be adapfc- ed so as to operate at a sliding rate several times greater than the rate of setting usual for the concrete, which turned out to be particularly advantageous.
  • the two vibra ⁇ tors operating in opposition may comprise two sets of vibrators situated substantially on the same, preferably horizontal plane and displaced 90 relative to one another.
  • the sliding form is particularly suited for placing concrete about steel pipes as the vibrations are here prevented from being transferred from the concrete to the steel pipe and from said steel pipe to the concrete again.
  • the completed composite object i.e. the steel pipe and the concrete, can be lifted away relatively quickly from the casting loca ⁇ tion and moved to the stock without damaging the poured con- crete. Subsequently, the production of the next object can be ini- tiated. The concrete does not set until it reaches the stock.
  • the lower edge of the steel cylinder may be provided with a circumferential supporting terminal flange, whereby the lower end of the steel cylinder is supported in a very simple manner.
  • the sleeve may be retained between the terminal flange of the steel cylin- - der and a lower steel ring, the terminal flange and.the steel ring for instance being interbolted.
  • the sleeve is retained in a very simple manner as well as it is relatively easily replaceable in case it is worn.
  • the sleeve may be of an axial dimension substantially corresponding to half the length of the steel cylinder, whereby the concrete below the steel cylinder obtains a good side support for a suitable period of time after the steel cylinder has left it.
  • the sleeve may be reinforced by means of at least one substantially circular tension band surrounding the sleeve, said tension band or bands optionally being made extending about a slightly greater or a slightly smaller sleeve diameter, e.g. by means of a tightening device provided with screw bolts.
  • a tightening device provided with screw bolts.
  • a suitable adjustment of the tightening device allows a slight extension of the sleeve at the bottom, i.e. it may be frusto-conical.
  • the sleeve may com- 0 prise more, for instance five reinforcing tension bands arranged substantially in parallel, whereby the con ⁇ crete is well supported.
  • the sleeve may be of a rela ⁇ tively small axial dimension, whereby an auxiliary steel cylinder may be mounted below and on the steel ring in connection with the sleeve, said auxiliary steel cylin- der being of a clear substantially corresponding to the clear of the steel cylinder. In this manner the concrete positioned in the area immediately below the lower edge of the steel cylinder is additionally supported to the side.
  • the axial dimension of the auxiliary steel cylinder may correspond substantially to the axial dimension of the steel cylinder, sai di-- mensioning turning out to be advantageous in practice.
  • the auxiliary steel cylinder may be slotted on the major portion of its length, preferably along four equidistant generatrixes, whereby each of the resulting cylinder parts may be connected to its moving mechanism moving portions of this part away from or towards a central axis in the sliding form, said moving mechanism furthermore being connected to the carrying platform.
  • the moving mechanisms for the parts of the auxiliary steel cylinder may be telescopically formed pull or push rods which are pref ⁇ erably hydraulicly operated, whereby a simple and very reliable running sliding form is obtained.
  • Fig. 1 is a side view of an embodiment of the sliding form according to the invention.
  • Fig. 2 is a sectional view of the embodiment of Fig, 1 taken along the line II-II of Fig. 1,
  • Fig. 3 is a vertical sectional view of a vibration-ab ⁇ sorbing sleeve
  • Fig. 4 is a side view of a second embodiment of the slid ⁇ ing form according to the invention, whereby an auxiliary steel cylinder is mounted below a lower steel ring and in connection with the sleeve.
  • the sliding form of Fig. 1 is suitable for placing, e.g. about a- steel pipe, a dry mix concrete, i.e. a concrete of a consistency as moist earth.
  • the form is a cylinder 1 of steel plate.
  • Four vibrators 2, cf. Figs. 1 and 2 are mounted on vertical U-irons 3 on the cylinder, said vibrators for instance being electro-magnetic and being situated equidista ⁇ tly along the circumference of the cylinder.
  • a reinforcing terminal flange in the form of a circumferential single iron 4 is welded onto and along the lower edge of the cylinder. Beyond the reinforcing effect this terminal flange retains a vibration-absorb ⁇ ing sleeve 5, cf.
  • the sleeve is preferably made of rubber or a rubber-like material. It may optionally be surrounded by substantially circular tension bands 6 ensuring in the closed position, cf. Fig. 1, that the diameter of the sleeve remains unchanged in spite of the pressure of the poured concrete. As ' illustrated these tension bands may be secured to a tightening device for instance in the form of two vertical angle irons 7. These angle irons can be turned away from one another by means of a spindle 8, whereby the sleeve 5 is enlarged at the bot ⁇ tom, i.e. is frusto-conical.
  • the material of the sleeve follows always the extension of the tension bands which allows a mutual movement of the material of the sleeve and the tension bands along the circumference.
  • the sliding of the form can be terminated with ⁇ out causing a raising of the uppermost portion of the concrete within the sleeve together with said sleeve.
  • Four angular brackets 9 appear from the top of Fig. 1. These brackets are secured on the steel cylinder 1 and serve to suspend the sliding form on an outer supporting structure not shown and forming part of a production plant.
  • Fig. 4 illustrates an alternative embodiment of the slid ⁇ ing form where the sleeve 5a of vibration-absorbing ma ⁇ terial is of a very short axial length, and where an auxiliary steel cylinder 10 is provided on the underside of the steel ring 14, i.e. in connection with the sleeve and as an extension thereof.
  • This auxiliary steel cylin ⁇ der is made of steel plate of a suitable thickness and is of a clear substantially corresponding to the clear of the steel cylinder 1.
  • the auxiliary steel cylinder 10 ma for instance be provided on the steel ring 14 by means of four bolts 16 with associated spring washers.
  • the auxiliary cylinder 10 is for instance of an axial length of about one third of the axial length of the steel cylinder 1. It may, however, also be of an axial length substantially corresponding to the axial length of the steel cylinder 1.
  • the auxiliary steel cylinder 10 and optionally also the steel ring 14 can be slotted along four equidistant generatrixes, one of said slots 18 ap ⁇ pearing from Fig. 4.
  • the auxiliary steel cylinder 10 includes consequently four separate cylinder parts, only two parts 10a and 10b being visible. These parts are coherent at the top as the slotting stops about 10 mm from the upper edge of the auxiliary steel cylinder.
  • the above bolts 16 can be centrally mounted on their respec- tive cylinder part.
  • each cylinder part can be connected to a moving mechanism 12, which is diagrammatically shown.
  • This mechanism moves portions of the part away from or towards a central axis of the sliding form and is furthermore connected to a carrying platform not shown.
  • This platform is displaceably situat ⁇ ed on an outer supporting structure not shown and com ⁇ prises preferably telescopically formed pull or push rods which for instance are hydraulicly operated.
  • An activation of these pull or push rods allows a moving of. the lower edge of the auxiliary steel cylinder a suitable distance outwards, which is an advantage espe ⁇ cially at the termination of the sliding movement of the form.
  • the-pull or push rods 12 are adjusted in such a manner that the lower edge of the auxiliary steel cylinder is closely abutting the surface of the concrete.
  • the invention may be varied in many ways without there ⁇ by deviating from the scope thereof.
  • the inventive sliding form allows a sliding rate of about 2 m per minute.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

Un moule coulissant pour couler des colonnes en plaçant du béton de mélange à sec dans le moule, par exemple autour d'un tuyau en acier, comporte un cylindre (1) sur lequel sont montés des vibrateurs (2). Le moule coulissant doit être monté de manière déplaçable dans une structure de support. Les vibrateurs (2) sont électromagnétiques, opposés diamétralement l'un à l'autre et conçus en outre pour fonctionner en opposition. L'extrémité inférieure du cylindre en acier (1) est relativement rigide et dotée d'un manchon (5) à base d'un matériau absorbant les vibrations, par exemple du caoutchouc, à son bord inférieur. Par conséquent, on obtient un moule coulissant pouvant coulisser à une vitesse plusieurs fois supérieure à la vitesse possible auparavant. Dans l'extension immédiate du manchon (5) est prévu un cylindre en acier auxiliaire (10) fendu en quatre parties (10a, 10b). Ces dernières peuvent être manipulées grâce à des tiges télescopiques de telle manière que le bord inférieur du cylindre en acier auxiliaire est "ouvert" et "fermé" autour de la surface du béton.A sliding mold for pouring columns by placing dry mix concrete in the mold, for example around a steel pipe, comprises a cylinder (1) on which vibrators (2) are mounted. The sliding mold must be movably mounted in a support structure. The vibrators (2) are electromagnetic, diametrically opposed to each other and further designed to operate in opposition. The lower end of the steel cylinder (1) is relatively rigid and has a sleeve (5) based on a vibration-absorbing material, for example rubber, at its lower edge. Consequently, a sliding mold is obtained which can slide at a speed several times greater than the speed possible previously. In the immediate extension of the sleeve (5) is provided an auxiliary steel cylinder (10) split into four parts (10a, 10b). These can be manipulated using telescopic rods so that the bottom edge of the auxiliary steel cylinder is "open" and "closed" around the surface of the concrete.

Description

Title: A Sliding Form for Casting Columns.
Technical Field
The invention relates to a sliding form for casting columns by placing a dry mix concrete in the form, e.g. about a steel pipe, and whereby the sliding form is preferably to be suspended in a carrying platform dis- placeably situated in a supporting structure, said slid¬ ing form comprising a steel cylinder with vibrators . mounted thereon.
Background Art
It is generally known to use sliding forms (slip form) when casting columns, walls, or other prismatic or cylin¬ drical units of concrete. The sliding form used surrounds the object to be cast and is usually of a dimension of 1 - 1.5 m. The casting is initiated with the form in the bottom position, but after a period of 3 to 4 hours, i.e. when the form is filled with concrete, the raising of the form is started along with the filling in of poured concrete in such a manner that the form is always filled up. The raising speed is typically 30 cm per hour, which in connection with a sliding form height as stated means that as the form is raised the concrete laid open below said form is 4 to 5 hours old and consequently set. The form is usually raised by means of hydraulic jacks with grips "climbing" round bars cast into the concrete. The concrete used is of a plastic consistency, and the neces¬ sary compressing is carried out by means of poker vibra¬ tors put down into the upper 30-40 cm thick layer of poured concrete. The sliding form is mounted so as to allow a "slip", i.e. the form walls are inclined, the lower wall edge being bent 0,5 - 1.0 cm backwards away from the concrete surface produced in order to reduce the friction between the form and the concrete while said form is sliding upwards.
US patent specification No. 3,468,001 discloses a slid¬ ing form for casting columns and formed as a steel cylin¬ der. The diameter of the steel cylinder is constant to- wards the lower edge, and consequently it allows no slip. A vibrator is mounted on the wall of the form in such a manner that the form can be used for a relatively dry mixture of concrete and run at an increased sliding speed. Such a sliding form for casting columns does not, however, run completely satisfactorily because heavy vibrations arise at the lower edge of the steel cylinder when the vibrator is running, said heavy vibrations causing serious pits in the surface of the concrete immediately below the steel cylinder.
A satisfactory running of the steel cylinder requires a prior displacement (sliding) thereof relative to the concrete when the latter has been set. When the steel cylinder is displaced at a too early stage, the concrete may not be able to retain its shape in spite of the fact that it is of a consistency as moist earth.
Disclos of TnVention
The object of the invention is to provide a sliding form for casting columns of the above type which allows a sliding of the form at a sliding rate many times greater than previously possible.
The sliding form according to the invention is charac¬ terised in that the vibrators are preferably electro-mag¬ netic and situated diametrically opposite one another and furthermore adapted so as to operate in opposition, and that the lower end of the steel cylinder is rela¬ tively rigid, said lower end being provided with a sleeve of vibration-absorbinσ material such as rubber. In this manner the concrete produced is nondeform imme¬ diately upon the compressing. The reinforcement of the lower end of the steel cylinder implies that the vibra¬ tions at the lower edge of the steel cylinder are so insignificant that they do not damage the shape of the free concrete. The vibration-absorbing sleeve supports the free concrete below the lower edge of the steel cyl¬ inder without transferring the vibrations to the con¬ crete at said edge. As a result the placed concrete is sufficiently vibrated without implying that the vibra¬ tions extend essentially below the lower edge of the steel cylinder where they might cause damages. The sleeve supports the concrete just placed by the steel cylinder and thereby assists the concrete in maintain- ing its shape. The placed concrete is far from being set. Such a procedure allows a sliding rate of the slid¬ ing form which is many times greater than previously possible.
According to the invention the sliding form may be adapfc- ed so as to operate at a sliding rate several times greater than the rate of setting usual for the concrete, which turned out to be particularly advantageous.
Furthermore according to the invention, the two vibra¬ tors operating in opposition may comprise two sets of vibrators situated substantially on the same, preferably horizontal plane and displaced 90 relative to one another. As a result the sliding form is particularly suited for placing concrete about steel pipes as the vibrations are here prevented from being transferred from the concrete to the steel pipe and from said steel pipe to the concrete again. The completed composite object, i.e. the steel pipe and the concrete, can be lifted away relatively quickly from the casting loca¬ tion and moved to the stock without damaging the poured con- crete. Subsequently, the production of the next object can be ini- tiated. The concrete does not set until it reaches the stock.
Moreover according to the invention the lower edge of the steel cylinder may be provided with a circumferential supporting terminal flange, whereby the lower end of the steel cylinder is supported in a very simple manner.
Furthermore according to the invention the sleeve may be retained between the terminal flange of the steel cylin- - der and a lower steel ring, the terminal flange and.the steel ring for instance being interbolted. In this man- ner the sleeve is retained in a very simple manner as well as it is relatively easily replaceable in case it is worn.
According to the invention the sleeve may be of an axial dimension substantially corresponding to half the length of the steel cylinder, whereby the concrete below the steel cylinder obtains a good side support for a suitable period of time after the steel cylinder has left it.
According to the invention the sleeve may be reinforced by means of at least one substantially circular tension band surrounding the sleeve, said tension band or bands optionally being made extending about a slightly greater or a slightly smaller sleeve diameter, e.g. by means of a tightening device provided with screw bolts. In this manner the diameter of the sleeve is kept unchanged in spite of the pressure of the poured concrete. A suitable adjustment of the tightening device allows a slight extension of the sleeve at the bottom, i.e. it may be frusto-conical.
Moreover according to the invention the sleeve may com- 0 prise more, for instance five reinforcing tension bands arranged substantially in parallel, whereby the con¬ crete is well supported. According to the invention the sleeve may be of a rela¬ tively small axial dimension, whereby an auxiliary steel cylinder may be mounted below and on the steel ring in connection with the sleeve, said auxiliary steel cylin- der being of a clear substantially corresponding to the clear of the steel cylinder. In this manner the concrete positioned in the area immediately below the lower edge of the steel cylinder is additionally supported to the side.
According to the invention the axial dimension of the auxiliary steel cylinder may correspond substantially to the axial dimension of the steel cylinder, sai di-- mensioning turning out to be advantageous in practice.
Moreover according to the invention the auxiliary steel cylinder may be slotted on the major portion of its length, preferably along four equidistant generatrixes, whereby each of the resulting cylinder parts may be connected to its moving mechanism moving portions of this part away from or towards a central axis in the sliding form, said moving mechanism furthermore being connected to the carrying platform. As a result it is easy to adjust the pressure of the auxiliary steel cyl¬ inder on the concrete, i.e. the side support of the concrete positioned below the lower edge of the steel cylinder. While the form is sliding the parts are abut¬ ting the surface of the concrete, and at the termination of the sliding procedure the lower end of the parts is released from said surface.
Finally according to the invention the moving mechanisms for the parts of the auxiliary steel cylinder may be telescopically formed pull or push rods which are pref¬ erably hydraulicly operated, whereby a simple and very reliable running sliding form is obtained. Brief Description of Drawings
The invention will be described below with reference to the accompanying drawing, in which
Fig. 1 is a side view of an embodiment of the sliding form according to the invention.
Fig. 2 is a sectional view of the embodiment of Fig, 1 taken along the line II-II of Fig. 1,
Fig. 3 is a vertical sectional view of a vibration-ab¬ sorbing sleeve, and
Fig. 4 is a side view of a second embodiment of the slid¬ ing form according to the invention, whereby an auxiliary steel cylinder is mounted below a lower steel ring and in connection with the sleeve.
Best Mode for Carrying Out the Invention
The sliding form of Fig. 1 is suitable for placing, e.g. about a- steel pipe, a dry mix concrete, i.e. a concrete of a consistency as moist earth. The form is a cylinder 1 of steel plate. Four vibrators 2, cf. Figs. 1 and 2, are mounted on vertical U-irons 3 on the cylinder, said vibrators for instance being electro-magnetic and being situated equidistaπtly along the circumference of the cylinder. A reinforcing terminal flange in the form of a circumferential single iron 4 is welded onto and along the lower edge of the cylinder. Beyond the reinforcing effect this terminal flange retains a vibration-absorb¬ ing sleeve 5, cf. Fig. 3, together with a lower steel ring 14. The sleeve is preferably made of rubber or a rubber-like material. It may optionally be surrounded by substantially circular tension bands 6 ensuring in the closed position, cf. Fig. 1, that the diameter of the sleeve remains unchanged in spite of the pressure of the poured concrete. As' illustrated these tension bands may be secured to a tightening device for instance in the form of two vertical angle irons 7. These angle irons can be turned away from one another by means of a spindle 8, whereby the sleeve 5 is enlarged at the bot¬ tom, i.e. is frusto-conical. The material of the sleeve follows always the extension of the tension bands which allows a mutual movement of the material of the sleeve and the tension bands along the circumference. As a result, the sliding of the form can be terminated with¬ out causing a raising of the uppermost portion of the concrete within the sleeve together with said sleeve. Four angular brackets 9 appear from the top of Fig. 1. These brackets are secured on the steel cylinder 1 and serve to suspend the sliding form on an outer supporting structure not shown and forming part of a production plant.
Fig. 4 illustrates an alternative embodiment of the slid¬ ing form where the sleeve 5a of vibration-absorbing ma¬ terial is of a very short axial length, and where an auxiliary steel cylinder 10 is provided on the underside of the steel ring 14, i.e. in connection with the sleeve and as an extension thereof. This auxiliary steel cylin¬ der is made of steel plate of a suitable thickness and is of a clear substantially corresponding to the clear of the steel cylinder 1. The auxiliary steel cylinder 10 ma for instance be provided on the steel ring 14 by means of four bolts 16 with associated spring washers.
As shown the auxiliary cylinder 10 is for instance of an axial length of about one third of the axial length of the steel cylinder 1. It may, however, also be of an axial length substantially corresponding to the axial length of the steel cylinder 1. As illustrated, the auxiliary steel cylinder 10 and optionally also the steel ring 14 can be slotted along four equidistant generatrixes, one of said slots 18 ap¬ pearing from Fig. 4. The auxiliary steel cylinder 10 includes consequently four separate cylinder parts, only two parts 10a and 10b being visible. These parts are coherent at the top as the slotting stops about 10 mm from the upper edge of the auxiliary steel cylinder. The above bolts 16 can be centrally mounted on their respec- tive cylinder part. On the outer surface each cylinder part can be connected to a moving mechanism 12, which is diagrammatically shown. This mechanism moves portions of the part away from or towards a central axis of the sliding form and is furthermore connected to a carrying platform not shown. This platform is displaceably situat¬ ed on an outer supporting structure not shown and com¬ prises preferably telescopically formed pull or push rods which for instance are hydraulicly operated. An activation of these pull or push rods allows a moving of. the lower edge of the auxiliary steel cylinder a suitable distance outwards, which is an advantage espe¬ cially at the termination of the sliding movement of the form. While the form is sliding, the-pull or push rods 12 are adjusted in such a manner that the lower edge of the auxiliary steel cylinder is closely abutting the surface of the concrete.
The invention may be varied in many ways without there¬ by deviating from the scope thereof.
Under usual operational conditions the inventive sliding form allows a sliding rate of about 2 m per minute.

Claims

Claims :
1. A sliding form for casting columns by placing a dry mix concrete in the form, e.g. about a steel pipe, and whereby the sliding form is preferably to be suspend- ed in a carrying platform displaceably situated in a supporting structure, said sliding form comprising a steel cylinder (1) with vibrators (2) mounted thereon, c h a r a c t e r i s e d in that the vibrators are preferably electro-magnetic and situated diametrically opposite one another and furthermore adapted so as to operate in opposition, and that the lower end of the steel cylinder is relatively rigid, said lower end be¬ ing provided with a sleeve (5) of vibration-absorbing material such as rubber.
2. A sliding form as claimed in claim 1, c h a r ¬ a c t e r i s e d in that it is adapted so as to oper¬ ate at a sliding rate several times greater than the rate determined by the usual setting rate of concrete.
3. A sliding form as claimed in claim 1 or 2, c h a r a c t e r i s e d in that the two vibrators (2) operating in opposition comprise two sets of vibra¬ tors situated substantially on the same, preferably .horizontal plane and displaced 90 relative to one another.
4. A sliding form as claimed in one or more of the preceding claims 1 to 3, c h a r a c t e r i s e d in that the lower end of the steel cylinder is provided with a circumferential, supporting terminal flange (4) .
5. A sliding form as claimed in one or more of the preceding claims 1 to 4, c h a r a c t e r i s e d in that the sleeve (5) is retained between the terminal flange (4) of the steel cylinder and a lower steel ring (14) , the terminal flange (4) and the steel ring (14) for instance being interbolted (16) .
6. A sliding form as claimed in one or more of the preceding claims 1 to 5, c h a r a c t e r i s e d in that the sleeve (5) is of an axial dimension substanti- ally corresponding to half the length of the steel cyl¬ inder.
7. A sliding form as claimed in one or more of the preceding claims 1 to 6, c h a r a c t e r i s e d in that the sleeve (5) is reinforced by means of at least one substantially circular tension band (6) surrounding the sleeve, said tension band or bands optionally being made extending about a slightly greater or a slightly smaller sleeve diameter, e.g. by means of a tightening device (7) provided with screw bolts (8) .
8. A sliding form as claimed in claim 7, c h a r a c ¬ t e r i s e d in that the sleeve (5) comprises at least five reinforcing tension bands (6) arranged substantial¬ ly in parallel.
9. A sliding form as claimed in one or more of the preceding claims 1 to 8, c h a r a c t e r i s e d in that the sleeve (5a) is of a relatively small axial dimension, and that an auxiliary steel cylinder (10) is mounted below and on the steel ring (14) in connection with the sleeve, said auxiliary steel cylinder being of a clear substantially corresponding to the clear of the steel cylinder (1) .
10. A sliding form as claimed in claim 9, c h a r ¬ a c t e r i s e d in that the axial dimension of the auxiliary steel cylinder (10) corresponds substantially to the axial dimension of the steel cylinder (1) .
11. A sliding form as claimed in claim 9 or 10, c h a r a c t e r i s e d in that the auxiliary steel cylinder (10) is slotted (18) on the major portion of its length, preferably along four equidistant generatrix- 5 es, and that each of the resulting cylinder parts (10a, 10b) is connected to its moving mechanism (12) moving portions of this part away from or towards a central axis in the sliding form, said moving mechanism (12) further¬ more being connected to the carrying platform.
10 12, A sliding form as claimed in one or more of the preceding claims 9 to 11, c h a r a c t e r i s e d in that the moving mechanisms (12) for the parts (10a, 10b) of the auxiliary cylinder are telescopically formed pull or push rods which are preferably hydraulicly operated.
EP19850900986 1984-02-14 1985-02-14 A sliding form for casting columns Withdrawn EP0171422A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK644/84 1984-02-14
DK64484A DK64484A (en) 1984-02-14 1984-02-14 COLUMN GUIDE FORM

Publications (1)

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EP0171422A1 true EP0171422A1 (en) 1986-02-19

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EP19850900986 Withdrawn EP0171422A1 (en) 1984-02-14 1985-02-14 A sliding form for casting columns

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EP (1) EP0171422A1 (en)
AU (1) AU3991485A (en)
DK (1) DK64484A (en)
WO (1) WO1985003734A1 (en)

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CN111287462A (en) * 2020-03-02 2020-06-16 朱世杰 Auxiliary assembly is consolidated to heel post for construction

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DK23090D0 (en) * 1990-01-29 1990-01-29 Christiani & Nielsen As METHOD FOR CONCRETING STEEL BEARS
CN105298137A (en) * 2015-10-30 2016-02-03 中国十七冶集团有限公司 Steel column concrete auxiliary vibration device and installation and using method thereof
CN108999410B (en) * 2018-08-15 2021-01-05 江苏叙施建筑科技有限公司 Annular guide movable type vibrating device
CN110107090B (en) * 2019-05-17 2020-12-22 钱野 Cast-in-place concrete electromagnetic vibrating process and implementing device thereof

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GB544275A (en) * 1940-03-08 1942-04-07 Niels Steensen Improved process for the manufacture of castings of artificial stone such as concrete
US3468001A (en) * 1967-07-24 1969-09-23 Bodine Albert G Apparatus including an orbiting-mass sonic oscillator for slip-forming concrete
US4253810A (en) * 1980-01-21 1981-03-03 Bezhanov Tigran V Concrete placing apparatus for casting solid walls

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN111287462A (en) * 2020-03-02 2020-06-16 朱世杰 Auxiliary assembly is consolidated to heel post for construction
CN111287462B (en) * 2020-03-02 2020-12-01 新沂市锡沂高新材料产业技术研究院有限公司 Auxiliary assembly is consolidated to heel post for construction

Also Published As

Publication number Publication date
AU3991485A (en) 1985-09-10
DK64484A (en) 1985-08-15
WO1985003734A1 (en) 1985-08-29
DK64484D0 (en) 1984-02-14

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