WO2004057122A1 - Systeme de levage de dalles en beton - Google Patents

Systeme de levage de dalles en beton Download PDF

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Publication number
WO2004057122A1
WO2004057122A1 PCT/NZ2003/000281 NZ0300281W WO2004057122A1 WO 2004057122 A1 WO2004057122 A1 WO 2004057122A1 NZ 0300281 W NZ0300281 W NZ 0300281W WO 2004057122 A1 WO2004057122 A1 WO 2004057122A1
Authority
WO
WIPO (PCT)
Prior art keywords
jack
slab
shaft
strut
floor
Prior art date
Application number
PCT/NZ2003/000281
Other languages
English (en)
Inventor
Gregory John Neighbours
Original Assignee
Jacking Systems Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from NZ52336002A external-priority patent/NZ523360A/en
Application filed by Jacking Systems Limited filed Critical Jacking Systems Limited
Priority to US10/540,661 priority Critical patent/US20060117678A1/en
Priority to AU2003288829A priority patent/AU2003288829B2/en
Priority to EP03781135A priority patent/EP1585870A4/fr
Priority to JP2004562139A priority patent/JP2006511412A/ja
Publication of WO2004057122A1 publication Critical patent/WO2004057122A1/fr

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Classifications

    • 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
    • E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
    • E04B1/3511—Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/46—Combinations of several jacks with means for interrelating lifting or lowering movements

Definitions

  • This invention relates to the lifting of pre-cast concrete slabs and has particular application to a method and apparatus for constructing a multi-storey building.
  • a jacking system as developed by the inventor of the present invention, in US 5,644,893, covered a system for constructing multi-storey buildings.
  • the system comprised extendible props (or jacks) being retractable and having cable suspension means.
  • extendible props or jacks
  • cable suspension means
  • the jack relied on an extendable mid portion which was inefficient in its operation, expensive to manufacture and difficult to stabilise during use.
  • the system relied on separate parts such as other prop supports and the extendible props(jacks) and only the floor below to provide the means to push from, making the system time consuming and less safe than it should be.
  • existing scaffolding systems are time consuming to erect and dismantle and restrict site movement creating a hazard.
  • the invention provides a system of lifting and conveying a concrete slab and/or associated works, wherein the slab having an area includes a plurality of apertures therethrough said slab area, the apertures being provided with a respective jack, said jack at least comprising at least one shaft having a portion passing through said aperture and contacting a lower support means, means for connecting said slab to said shaft, the connection means incorporating at least one supporting member connecting the slab to the shaft, each supporting member passing through another said aperture and engaging said slab, and a means for effecting longitudinal travel of said supporting means along said shaft, resulting in the raising or lowering of said slab, position sensors associated with each jack, means for communicating between each jack and one or more main controllers, and means for controlling each jack whereby the jacks are movable in a synchronised manner.
  • the jack includes trailing restraint means being adapted to provide restraint and or stability for the jack once it has climbed or the jack has been disconnected from the slab.
  • each aperture therein containing the supporting member is provided in co-operation with the position of the shaft, and henceforth the aperture through which it passes.
  • said lower supporting means includes a supporting strut supporting the shaft from the floor below.
  • said lower supporting means includes a back prop supporting the floor below the strut.
  • each aperture therein containing said shaft is proportionally larger in diameter than said aperture therein containing said supporting member.
  • each supporting member engages with the downwardly facing or upper face of the slab.
  • each jack has pivoting means such that in use each jack can accommodate displacement of the jack whereby there is a minimum transfer of moment through any tensile members.
  • each shaft comprises a pair of columns on either side of a ball screw, the ball screw being supported by a spherical roller bearing mounted in a top plate, thus bridging the columns.
  • the supporting member/s are steel rods adapted to connect said hanger assembly to the slab.
  • the supporting member/s are provided with a respective sleeve.
  • connection means comprises a hanger assembly in co-operation with at least one supporting member.
  • the supporting member/s are provided with bearing plates on the underside of the slab, and connected by corresponding bearing plates and fasteners to the hanger assembly.
  • the hanger assembly is supported for movement along said shaft, and more preferably the hanger assembly is pivotally supported at a point of rotation at some point along the central axis of the ball screw.
  • the ball screw will turn downwards in the opposite direction from when it is lifting a slab.
  • the hanger acts in compression and during lifting of each slab, the hanger is in tension.
  • the ball screw acts in tension while during lifting the ball screw acts in compression.
  • the means for communicating between each jack includes a wire and wireless means.
  • a micro processor or computer or PLC or in combination is connected via an electric motor to each jack such that synchronised position control is achieved for all the jacks.
  • each jack includes a screw jack driven by the electric or hydraulic motor which is controlled by a variable speed drive.
  • the system includes a scaffolding means, said scaffolding means adapted to associate with and accompany the concrete slab, wherein said scaffolding means comprises a platform, said platform adapted to engage with a shaft, said platform adapted to allow a number of persons to stand thereon; said shaft therein passing through a guiding means, said guiding means connected to a material to be lifted; a connection means therein adapted to connect the shaft with the material to be lifted.
  • said scaffolding means comprises a platform, said platform adapted to engage with a shaft, said platform adapted to allow a number of persons to stand thereon; said shaft therein passing through a guiding means, said guiding means connected to a material to be lifted; a connection means therein adapted to connect the shaft with the material to be lifted.
  • the invention provides a method of lifting a concrete slab and associated works, wherein there is provided a concrete slab having an area having a plurality of apertures therethrough, a number of said apertures provided with a respective jack, said jack at least comprising at least one shaft having a portion passing through said aperture and contacting a lower support means, means for connecting said slab to said shaft, the connection means incorporating at least one supporting member connecting the slab to the shaft, each supporting member passing through another said aperture and engaging said slab, and a means for effecting longitudinal travel of said supporting means along said shaft, otherwise resulting in the raising or lowering of said slab, position sensors associated with each jack, means for communicating between each jack and one or more main controllers, and means for controlling each jack wherein the method includes the following steps of:
  • the invention provides a jack for lifting a concrete slab, the jack including : a shaft and ball screw, a drive assembly, a hanger assembly, a support device wherein the drive assembly drives the ball screw to raise the shaft with respect to the hanger assembly such that the jack has climbed the support device supports the shaft to prevent toppling and provide stability.
  • the drive assembly further drives the ball screw to raise the hanger assembly with respect to the shaft such that in use the jack has lifted a slab
  • the support device includes a trailing restraint member being arranged with the shaft whereby the trailing restraint member is removably located and connected within the shaft such that in use it can be fully extended from the shaft when the jack has climbed.
  • a strut member is linked to the shaft such that when the jack is climbed, the strut can be raised with the jack to the next floor, to provide support for the jack to the floor below.
  • the strut is provided with a removable foot member, to redistribute any strut loading through the slab in the floor below the jack.
  • the jack includes a controller located at one end of the shaft whereby the position of the hanger can be precisely controlled.
  • the jack does not include a controller.
  • the controller is a micro processor or PLC or computer.
  • each jack has pivoting means such that in use each jack can accommodate displacement of the jack whereby there is a minimum transfer of moment.
  • a back prop can be used to support the floor directly below the strut such that at least two floors below each jack, can be used to provide support.
  • the back prop is provided with a removable foot member, to redistribute any prop loading through the slab in the floor below the strut.
  • the invention provides a method of lifting a concrete slab using at least one jack, each jack including: at least one shaft and ball screw, a drive assembly, a hanger assembly, a support device wherein the drive assembly drives the ball screw to raise the hanger assembly with respect to the shaft such that in use the jack has climbed and to raise the shaft to raise/lift a slab, the support device supports the shaft to prevent toppling and provide stability wherein the steps include:
  • Walls 50 can be placed before pouring slab 2 or afterwards; g) put new boxing for slab 3 ; h) attach strut 32 to base of jack 2 on ground or base slab with foot; i)-l) climb jack up to next level (first floor) without moving any slabs leaving strut in place from ground to jack (hangers in compression while ball screw in tension); trailing restraint automatically slidably drops down from inside each jack to extend to floor directly below whereby the jack is laterally supported so it will not fall over; m) n) o) once ground floor columns cured, release hanger from slab 1 to be under slab
  • ground floor walls/columns can be erected before the slab 2 pour;
  • the invention provides a method of lifting a concrete slab using at least one jack, each jack including: a shaft and ball screw, a drive assembly, a hanger assembly, a support device wherein the drive assembly drives the ball screw to raise the hanger assembly with respect to the shaft such that in use when the jack has climbed to raise a slab, the support device supports the shaft to prevent toppling and provide stability wherein the steps include:
  • a strut is provided to support the jack.
  • a back prop is provided to support the strut.
  • Figure 1 is a schematic drawing showing the relationship of four jacks, and a computer controller.
  • Figure 2 illustrates a schematic of the variable speed drive attached to each jack.
  • Figure 3 is a side elevational view of a multi-storey building being constructed in accordance with an embodiment of this invention.
  • Figure 4 is a side elevational view of one of the jacks, a first-floor slab being lifted.
  • Figure 5 is a side elevational view showing an additional slab being connected in preparation for raising.
  • Figure 6 is a side elevational view showing an additional slab being cast in situ.
  • Figure 7 is a side elevational view showing the raising of the shaft and associated supported strut.
  • Figure 8 is a side elevational view showing the shaft and associated support strut having been raised and connected.
  • Figure 9 are schematic representations of the first part of slab lifting sequence.
  • Figure 10 are schematic representations of the rest of the slab lifting sequence.
  • Figure 11 is a schematic representation of a single jack with only one side of the hanger assembly shown in place in two slabs.
  • Figure 11a is a side view of the typical j ack of figure 11.
  • Figure 12 Is a side elevation of a building, the uppermost slab prepared for the pouring of an additional slab thereon.
  • Figure 13 Is a side elevation of a building, the slab engagement means having been connected with newly poured slab 24.
  • Figure 14 Is a side elevation of a building, slab 24 and associated scaffolding having been raised.
  • Figure 15 Is a side elevation of a building, slab 26 having been poured onto slab 24.
  • Figure 16 Is a side elevation of a building, for the pouring and subsequent raising of an additional slab 24.
  • Each jack is a screw jack driven by an electric motor 3, which is controlled by variable speed drive 4.
  • each motor can be a 0.75-1.5 kW, four pole, 50Hz, flange mounted 400 volts, brake motor.
  • Each motor 3 will be driven by a three phase power supply typically 400 volts at 100 amps.
  • Each motor is controlled by a central computer 5.
  • the system can provide a synchronised position control through a system controller of a number of motors 3.
  • One control parameter is position synchronisation between all the jacks. This makes use of variable speed control of the individual jack motors, plus a supervisory layer.
  • the implementation of the controls can be:
  • the initial prototype uses a 6 jack system. However, this system can be easily stretched to a 70 jack system. For example to monitor or operate the system requires a MMI for example a screen with a motivaterTM based software system.
  • Each Jack 2A - 2B is the building block of the system. It is to be considered a self-contained element that is lifted onto site, connected into power and communications and is ready to operate. Consideration should be given to the outdoor and physical nature of a construction site. . . .
  • the system can be designed so that up to 10 jacks can be daisy chained together; the 10 jacks are to be considered as being connected in series, and not in a ring. « Jacks can be located 15m apart.
  • the cabling (not shown) can be hardwired at one end, with a plug located on the other end or using plugs at both ends. Both wire and or wireless can be utilized.
  • Each jack includes at least one set of sockets (power and communications) for daisy chaining a further j ack.
  • the connectors can be used easily with gloved or ungloved hands.
  • Each jack 2A-2D as shown in figures 3-9 include a shaft 12 and ball screw 9, a drive assembly 8, a hanger assembly 15 and a support device 7.
  • the jack is self climbing jack whereby a slab 20 can be lifted by a hanger assembly 15 and the jack self climbs afterwards.
  • the drive assembly 8 can include a variable speed drive which drives the ball screw 9 by rotating in one direction to raise the jack during self climbing or in the opposite direction to lift a slab with the connected hanger assembly 15, with respect to the shaft such that in use when the jack has climbed to raise a slab, the support device supports the shaft/jack to prevent toppling and provide stability.
  • a hanger assembly which includes hanger beam 17 strdling the shaft 12.
  • Hanger rods 16 downwardly extend from the hanger beam 17 to extend through the slab to be lifted.
  • Fixing means such as nuts and washers being provided.
  • a thrust plate 18 Located between the base of the hanger assembly 15 and the top of the slab, is a thrust plate 18.
  • the support device includes a trailing restraint member 7 being arranged with the shaft 12 whereby the trailing restraint member 7 is removably connected to the shaft.
  • trailing restraint member can be slidably located within the shaft 12. In use the restraint 7 is slid out downwardly beyond the shaft when the jack climbs.
  • the shaft can be any suitable configuration that allows the trailing restraint to always drop out during the jack climbing and or when each jack is disconnected from the slab.
  • Restraint 7 can be removably connected to the shaft 12 by a rod and nut assembly. After climbing, the restraint can easily self slide back with the shaft while being pulled up as the building height increases.
  • a strut member 32 is linked to the shaft 12 such that when the jack is raised, the strut can be raised with the j ack to the next floor, to provide support for that jack.
  • Each jack 2A-2D can include at least one controller located at one end of the shaft 12 (figure 4) whereby the position of the hanger 15 can be precisely controlled.
  • the jack does not include a separate controller but a central system controller 5 as in figure 1.
  • the controller is a micro processor or PLC or computer with a suitable MMI.
  • Each jack has pivoting means such that in use each jack can accommodate displacement of the jack whereby there is a minimum transfer of moment.
  • the pivoting means comprises at least two pivoting mechanisms 11 and 13 & 14. One being located centrally under the hanger 15 on top of the ball screw nut 10 when connected to the shaft 12 and a pair of opposing pivoting devices 13 & 14 located at the base of the hangers closest to the slab being lifted or plate 18.
  • the jack includes a back prop 33 to be used to support the floor below the strut 32.
  • Other pivot mechanisms can also be provided to reduce any moment that could be created within each jack.
  • a plate or other supplementary tensile device such as two opposing tensile devices.
  • the plate 18 can be added to the underside of the nut 10 so that the weight of the jack can be transferred on to the nut from the floor during lifting. This avoids the bearing on top of the nut acting in tension during climbing.
  • the plate other devices are also possible such as beams or frames.
  • the shaft 12 In lifting a slab, the shaft 12 rests on a lower floor and the rotating ball screw drives the nut upwards. If the nut engages or mets the underside of the top floor slab, it will be raised with the nut. However if the nut is engaged with or is resting on the top floor and the ball screw turns in the opposite direction, the jack will move upwards until the nut is at the bottom of the ball screw. Therefore the direction of rotation of the ball screw determines whether a slab is lifted or the jack itself is self climbed to be ready for the next lift.
  • the shaft, strut and back props can have removable feet 19 as shown in figure 9 (l)-(o) and figure 10 (s), (t) & (u).
  • Feet 19 are designed and dimensioned to cover any slab aperture and provide adequate strength to spread any jack loading away from the aperture and into the slab.
  • All local controls, drives, cabling can be mounted onto the jack itself, and as much as possible into a single enclosure.
  • the equipment can be weatherproofed as per required standards such as IP65, and all non-IP65 elements can be enclosed.
  • the motor 3 can be a 4pole, 1.1 kW, flange mounted, brake motor. In another variation the motor can be a servo based motor. The motor is the only non-IP65 element on the jack. The motor can be mounted shaft down. For the position sensors an encoder can be used which is mounted on the motor. The encoder can be physically.protected from damage; e.g. being stood on.
  • Torque monitoring of the motor can be provided.
  • all jacks are driven until a pre-set torque is obtained (or a threshold distance is exceeded). This takes up an initial load; pre-tensioning and saves on time and travel. A percentage of the load being taken by the jacks which can be checked.
  • the jacks can have an overload rating. Although during the course of active lifting it is not envisaged that the jacks will operate in overload.
  • the drive is capable of being halted when a torque threshold or load threshold is exceeded. This is to guard against events like driving into the ends of the ball screw, jamming of the load being lifted and the like.
  • a load cell can be incorporated into the sensors.
  • the gearbox and ball screw can have efficiencies of better than 90%.
  • Regeneration capability is to be included.
  • a rating provided for the lowering ability given the drive is preferably housed in an IP65 enclosure; the lowering requirement will either be a short distance (say 50mm @ lmm sec) for final alignment or full lowering of the load (say 4.5m @ lmm/sec).
  • the regeneration resistors can be mounted externally.
  • the motor can have a brake which can be controlled and the motor torque and or load can be verified before the brake is released.
  • Other inputs to the drive can include:
  • Each of these inputs is to be considered as a set of clean contacts, and when opened the drive is to stop instantly (not drive to a halt).
  • the status of these inputs, especially when tripped, is to be reported to the central controller.
  • the simplest cable installation can be that the communications cable and the input power cable which daisy chain between jacks are strapped together. The effect of electrical noise on the power cable can be minimised such that any degradation in communications performance does not occur. Wireless technology can also be used.
  • the system controller can include:
  • the emergency stop push-button shall disable power to the system.
  • MMI Man Machine Interface
  • a PLC controller can be incorporated.
  • the nature of the MMI is to provide the supervisory and control level.
  • the minimum operator inputs can include:
  • the MMI can be laptop based, and running under Windows 95 or NT, or other suitable operating system. During the lift, all torque and position information recorded from the field can be time stamped and recorded to disk. This information can be saved in a tab-delimited fashion, such that it can be read into Microsoft Excel with no further modification.
  • a database of life load / hours run can be automatically maintained.
  • the replacement of a jack can be, due to failure say, should be task largely performed under MMI control with all setting and current position information downloaded across the communication link from the MMI to the drive when it is connected in.
  • the system can be driven to a halt and a warning reported.
  • the information from the field can be presented on the laptop screen such that exceptions are easily visible; something similar to green ... orange... red signal level displays which draw attention to the relevant points only.
  • Warnings are provided to the operator, indicating the nature of the problem and possible help.
  • the nature of the situation will determine the timeframe in which either the system responds or awaits operator input; e.g. an out of tolerance results in the system being driven to a halt.
  • Error and Warning conditions displayed on the MMI, and logged to file with a time stamp can include:
  • the provision of the total current drawn by the system (derived from drives). This may allow reduced speed operation from a supply rated less than that required to lift at full speed.
  • the positional accuracy between two jacks over the duration of the lift can be 0.5 mm.
  • the lift range is can be 5.5m and the time to traverse this distance is can be a minimum of 60 minutes. For example typically the maximum number of jacks may be 70. Provision can be made for faster traversals, e.g. when driving the jacks unloaded from one end to the other.
  • the primary task is to lift a slab and or any associated catch screens or formwork or scaffolding, such that the slab is maintained level over the duration of the lift.
  • a simple extension which does have occasional use is the ability to raise a slab onto a defined angle.
  • the ambient temperature range for operation can be 0°C to +50°C. It is expected that the load experienced by each jack will be different.
  • the following will now describe the use of the above jack on the construction of a multi-storey building with reference to Figures 3-9. This will provide an overview of the mechanical operation of a first type of jack, but the description of the control system in Figures 1 and 2 has been omitted from this 'mechanical description'.
  • a ground floor slab 5 on to which a concrete slab 20 is formed with a plurality of apertures (not labelled) therethrough.
  • a number of shafts 12 are positioned through said apertures and contacting said ground floor slab 5.
  • Boxing 6 is provided in preparation for the pouring of an additional slab in co-operation with preparation for the lifting of the slab 20, as the following will further explain.
  • a gearbox/motor/drive assembly 8 can be axially positioned at the top of each shaft 12 to drive the ball screw 9 to raise or lower a hanger assembly 15 with respect to the shaft 12 and hence raise or lower the slab 20 relative to the lower floor slab 5.
  • the shaft 12 can be any suitable supporting member that enables the trailing restraint to be accommodated therein. For example rectangular hollow section (RHS), tube, hollow box section or a frame.
  • the slab 20 can be then lowered approximately one slab thickness, so as to ensure the final floor to ceiling height does not gain a height of one slab thickness, after each slab is raised.
  • connection means 30 is then disconnected from the slab 20 and re-engaged with uppermost slab 22.
  • the foot portion 35 can be proportionally sized in relation to the respective aperture through which it passes (aperture 40 in this case), so as to facilitate the retraction of the foot 35 through the corresponding aperture 40.
  • the foot can be carried out by hand.
  • said slab is then prepared for the pouring of an additional slab 24, for example, by way of boxing 6, the connection means is engaged with newly poured slab 24, and the subsequent raising of said slab 24 (not illustrated).
  • the present invention allows lifting of the various slabs prior to full curing of the slabs.
  • a slab Once a slab is in position and raised the slab can be connected to the permanent structure by vertical elements such as support structures 50 and stabilise the slab while it fully cures.
  • vertical elements such as support structures 50 and stabilise the slab while it fully cures.
  • This curing stage it is possible to connect the slab 20 to the remainder of the building.
  • This connection with structural walls or columns of the building may be accomplished by means of connection plates or reinforcing steel extending from both the wall or column and the slab, this reinforcing steel overlapping in a previously formed void.
  • the connection is then accomplished by filling the void with a hardenable material, such as concrete.
  • Another method of attaching the slab to the building is to use structural beams which are connected to the wall of the floor below. To explain, a slab is lifted to a position slightly higher than the final floor to ceiling height. Structural beams or plinths are then positioned by any appropriate means for example small electric forklifts, and connected to the various walls. The slab is then lowered and connected to the structural beams or plinths.
  • Such a method of attaching the slab to the building is safer and speedier than conventional methods of construction and allows all work to be carried out on a stable platform.
  • said retraction of said shaft 12 is accompanied by the raising of strut supports 32, thereby providing effective engagement of jack with, for example, lower slab 22, as shown in figure 8.
  • the hanger During climbing the hanger acts in compression and during lifting of each slab, the hanger is in tension. Also during climbing the ball screw acts in tension while during lifting the ball screw acts in compression.
  • the floor Once the floor has been raised, it is connected to the vertical elements of the permanent structure, this may be accomplished by walls or columns 50 etc. When the integrity of this connection is reached, the floor load is released off the jack and transferred onto the connection joint mounting to the mentioned vertical elements.
  • the jack can then be 'climbed' through the said apertures and may include the struts and props by way of connection.
  • Experience has shown that when the jack is disconnected from the slab it will have a tendency to fall over, thereby necessitating the innovation of including in the jack, trailing restraints 7 that couple to the lower floors. These are shown in use in figures 9, 10 and 11.
  • the sequence of events may be summarised as, firstly pour a slab about the prop means, and cure to 22 megapascals (Mpa), prepare for the pouring of the second slab, raise slab and associated preparation means, disengage connection means from newly raised slab, pour uppermost slab, engage connection means with uppermost, newly poured slab, raise shafts, position support struts, engage struts with corresponding shaft/s, raise uppermost slab, repeat process. It should be noted that since the jack climbs the building with each newly constructed floor, there is no need to remove and re-position scaffolding from floor to floor.
  • Mpa megapascals
  • connecting at least one j ck to a slab connecting communication means to at least one jack; connecting at least one controller to the jack via the communication means; - activating the control means whereby each jack is preloaded followed by further activating the control means whereby the slab is raised/lowered by a specific amount.
  • Walls 50 can be placed before pouring slab 2 or afterwards; g) put new boxing for slab 3; h) attach strut 32 to base of jack 2 on ground or base slab with foot; i)-l) climb jack up to next level (first floor) without moving any slabs leaving strut in place from ground to jack (hangers in compression while ball screw in tension); trailing restraint automatically slidably drops down from inside each jack to extend to floor directly below whereby the jack is laterally supported so it will not fall over; m) n) o) once ground floor columns cured, release hanger from slab 1 to be under slab 2;restablish hangers and preload and then lift slab 2 to second floor with boxing for slab 3; p) pour slab 3 and place boxing on top for slab 4; fit columns to first floor under slab 2 before or after this pour; strut still in place with trailing restraint; q) prepare to climb jack and struts; position back prop 10; r) connect strut to back prop and
  • the scaffolding means can be attached to the concrete slab after being poured.
  • the scaffolding means includes formwork/boxing preparations 6 for each slab, support for workmen, safety components 5, support and means 12 to allow extension of the formwork and connection means 18 and guiding means 10 and 11 for connecting of the scaffolding means to a slab.
  • the scaffolding means is adapted to fit or be fitted to the edge of a concrete slab.
  • a concrete slab is poured in boxing/formwork about the jack and guiding means 10.
  • the first slab can be formed on the ground 3 or any convenient supporting surface.
  • the slab is cured, and preparations such as boxing/formwork, are made for the pouring of an additional slab on top.
  • the additional slab is poured around connection means 18.
  • the additional slab only and further associated preparation means are then raised.
  • the connection means is then disengaged from newly raised slab, the uppermost slab is poured, and the connection means is engaged with newly poured slab. The process is then repeated.
  • FIGS 12-16 there exists a ground floor slab 20, a first floor slab 22, and boxing 6 in preparation for the pouring of an additional slab 24.
  • Slab 20 is provided with a guiding means 10 outwardly affixed thereto.
  • a shaft 12 is provided through said guiding means, and incorporates a platform 5, said shaft otherwise hanging from slab 22 by way of the outwardly affixed connection means 18.
  • the platform can include provision for safety.
  • guard-rails can be provided or safety curtain can be attached.
  • connection means 18 is disengaged from lower slab 22, and re-engaged with top slab 24.
  • shaft 12 is disengaged with guide means 10 during lifting, and accordingly guide means 11 has been introduced to associate the shaft 12 with slab 22.
  • Figure 16 shows the preparation for the pouring and subsequent raising of an additional slab 24.
  • the above sequence can then be repeated for the number of storeys required for the building.
  • the present invention provides an inventive method and apparatus for constructing a multistorey building.
  • the inventive method and apparatus lifts an entire floor slab or sections of a floor slab into position without the need for exterior lifting apparatus such as cranes. There is also no need for repositioning of scaffolding, form- work etc. from one floor to the next since the inventive prop means climb the building as it is constructed ready to lift the next floor slab.
  • inventive apparatus may be used for any building with at least ground and first floor levels, it is envisaged that the inventive method and apparatus will provide the greatest benefits in large multi-storey buildings with approximately six or more floors.
  • control system of this invention enables the controlled lifting of cast concrete floors, without the need for external cranes or the like, as each floor can be cast upon the floor below, and provided with suitable apertures to allow the jacks to be inserted through those apertures, and to effectively climb up the building as the slabs are raised into position, as shown in the overview with respect to Figures 3-8.
  • the control system has the particular advantage in providing safe, smooth, controlled lifting such that the floor slabs can be raised substantially horizontally, and can be lifted together with any associated catch screens, edge form-work, or other ancillary structure or fittings located on or attached to the floor slab.
  • the invention lends itself to the construction of floor slabs of various plate sizes, and it is envisaged that a small operation may use six jacks operating in unison, but much larger multistorey buildings with substantial floor plates may use up to 70 jacks at a time.
  • the jacks are robust, and can be readily installed or removed from site to site. These jacks are not extendible thereby eliminating expensive overlapped portions that are difficult to stabilise and connect together causing both safety concerns and extra expense. They have trailing restraints that enable excellent stability during self climbing and are also configured such that the apertures size and occurrence in the slab are kept to a minimum thereby not compromising safety and slab integrity.
  • the struts and back props are optionally used with the jacks whereby the jacks though desirably more safer with the struts and back props will still be able to lift each a slab. If the back prop was included in the jack with the trailing restraint, the size of the jack would increase thereby creating the need for larger slab apertures.
  • the jack is also configured to enable at least two floors below, to be utilized to share the jacking loads and slab loads whereby during climbing there is an automatic lateral stability being provided to the jack.
  • the present invention provides an inventive apparatus for use with the construction of a multistorey building. It will be appreciated that there is no need to reposition scaffolding about the building, as the invention allows the apparatus to effectively climb the building with each additional slab being raised. It will also be appreciated that the present apparatus is easy to assemble and operate.
  • the control system is illustrated as being controlled by a laptop or portable computer, but it is possible that it could be controlled in a number of different ways either using specialist hardware, or off-the-shelf computers, and indeed the system could be controlled from off-site provided there is a suitable connection between the sensors and controllers on the jacks, perhaps via the Internet, to a specified computer.
  • the controller is on-site, and is available to an operator who can watch the operation of the jacks, as well as monitoring the computer screen and other readouts. In most cases the operator will position the portable computer in a cabin, caravan or the like on the site adjacent the building being constructed, although it is possible that the operator and the control computer could be located on the slab being lifted, although this is less preferable.
  • the shaft 12 may comprise a substantially vertical, elongate member (or combination of members) of a variety of differing cross-sectional shapes.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

L'invention concerne un système et un procédé de levage et de transport d'une dalle en béton et/ou d'ouvrages associés. La dalle en béton présente une zone à travers la quelle sont ménagées plusieurs ouvertures. Un vérin comprenant au moins une tige est pouvu d'une partie qui passe par une ouverture et vient en contact avec un moyen de support inférieur. Ce système comprend un moyen servant à raccorder la dalle à la tige. Ce moyen de raccordement comprend au moins un élément de support reliant la dalle à la tige. Chaque élément de support passe à travers une autre ouverture et est en contact avec la dalle. Le système présenté comprend au moins un moyen servant à déplacer longitudinalement ledit moyen de support le long de ladite tige, ce déplacement ayant pour résultat le levage ou l'abaissement de ladite dalle. Des capteurs de position sont associés à chaque vérin et le système comprend un moyen garantissant la communication et la commande entre chaque vérin et au moins un dispositif de commande principal. L'invention concerne également un vérin utilisé pour lever une dalle de béton, qui comprend une tige et une vis à billes, un ensemble d'entraînement, un ensemble de suspension et un dispositif de support. L'ensemble d'entraînement entraîne la vis à billes pour faire monter la tige par rapport à l'ensemble de suspension de sorte que lorsque le vérin s'est élevé, le dispositif de support soutient la tige pour empêcher un basculement et garantir la stabilité.
PCT/NZ2003/000281 2002-12-23 2003-12-19 Systeme de levage de dalles en beton WO2004057122A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US10/540,661 US20060117678A1 (en) 2002-12-23 2003-12-19 Concrete slab lifting system
AU2003288829A AU2003288829B2 (en) 2002-12-23 2003-12-19 Concrete slab lifting system
EP03781135A EP1585870A4 (fr) 2002-12-23 2003-12-19 Systeme de levage de dalles en beton
JP2004562139A JP2006511412A (ja) 2002-12-23 2003-12-19 コンクリートスラブのリフトシステム

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NZ523361 2002-12-23
NZ52336002A NZ523360A (en) 2002-12-23 2002-12-23 Concrete slab lifting Systems
NZ52336102 2002-12-23
NZ523360 2002-12-23

Publications (1)

Publication Number Publication Date
WO2004057122A1 true WO2004057122A1 (fr) 2004-07-08

Family

ID=32684358

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2003/000281 WO2004057122A1 (fr) 2002-12-23 2003-12-19 Systeme de levage de dalles en beton

Country Status (5)

Country Link
US (1) US20060117678A1 (fr)
EP (1) EP1585870A4 (fr)
JP (1) JP2006511412A (fr)
AU (1) AU2003288829B2 (fr)
WO (1) WO2004057122A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
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WO2006111239A1 (fr) * 2005-04-21 2006-10-26 Hans-Peter Barthelt Lit de soins comportant a un entrainement a deux moteurs
WO2007019414A2 (fr) * 2005-08-04 2007-02-15 Ceslab, Inc. Dalles suspendues structuralement, ajustables en hauteur pour une fondation structurale
US7818942B2 (en) * 2006-08-03 2010-10-26 Hitachi Plant Technologies, Ltd. Method of building a floor for a boiler cage

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US8092116B1 (en) * 2010-08-11 2012-01-10 Charles Lee Asplin Slab raising method
CA2794784C (fr) * 2011-11-08 2017-07-25 Peter Smith Connecteur de goujon amovible et ses systeme et methode d'installation et de retrait
US8459897B1 (en) * 2012-06-08 2013-06-11 Ronald A. Knapp Fragmented slab lifting apparatus and method
US8864421B2 (en) 2013-03-05 2014-10-21 Charles L. Asplin Structure lifting method and apparatus
US9556566B2 (en) * 2014-03-19 2017-01-31 Mark E. Sanders Leveling plate apparatus for a road repair system
US8978343B1 (en) * 2014-07-18 2015-03-17 Frederick J Sandor Method and system for transporting a cast panel
US9422735B1 (en) 2015-04-24 2016-08-23 Charles L. Asplin Methods and systems of applying forces using folded hoses
US10487473B2 (en) 2017-06-20 2019-11-26 Charles L. Asplin Wall lifting methods
CN107916792A (zh) * 2017-11-29 2018-04-17 上海建工五建集团有限公司 适用于水平预制构件的标高自动调节系统和方法
CN108331175A (zh) * 2018-04-29 2018-07-27 王林 套叠式整体提升建筑构造
CN110670865B (zh) * 2019-09-16 2021-11-09 广东博鼎建筑科技有限公司 爬架顶升系统、造楼机及爬架顶升控制方法

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006111239A1 (fr) * 2005-04-21 2006-10-26 Hans-Peter Barthelt Lit de soins comportant a un entrainement a deux moteurs
JP2008536590A (ja) * 2005-04-21 2008-09-11 バーセルト、ハンス−ピーター 医療用ダブルモータ式ベッド
WO2007019414A2 (fr) * 2005-08-04 2007-02-15 Ceslab, Inc. Dalles suspendues structuralement, ajustables en hauteur pour une fondation structurale
WO2007019414A3 (fr) * 2005-08-04 2008-04-17 Ceslab Inc Dalles suspendues structuralement, ajustables en hauteur pour une fondation structurale
US7823341B2 (en) 2005-08-04 2010-11-02 Ceslab, Inc. Height-adjustable, structurally suspended slabs for a structural foundation
US7818942B2 (en) * 2006-08-03 2010-10-26 Hitachi Plant Technologies, Ltd. Method of building a floor for a boiler cage

Also Published As

Publication number Publication date
EP1585870A1 (fr) 2005-10-19
AU2003288829B2 (en) 2009-04-30
AU2003288829A1 (en) 2004-07-14
US20060117678A1 (en) 2006-06-08
JP2006511412A (ja) 2006-04-06
EP1585870A4 (fr) 2008-09-24

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