JP2021514437A - Shaft slip foam device and method - Google Patents

Abstract

The present invention relates to a slip foam device (12, 14, 16) and an operation method (50) of the slip foam device for constructing the primary slip foam structure (22) from one side thereof. The slip foam device comprises a platform (12) having multiple working levels (28, 30, 32) and a lift device having at least one cable (14). The platform (12) is suitable for being suspended from above by a cable (14), and the lift device can operate to raise or lower the platform (12). A plurality of work levels (28, 30, 32) are provided around the platform (12) and surround the central space through the plurality of work levels. This method involves suspending the platform from above using a lift device (14, 16) and raising the platform (12) using a lift device (14, 16) to raise at least one rebar cage (18, 16). A step of performing a rebar installation operation, including installing 20), and a step of lowering the platform (12) to the base of at least one rebar cage (18, 20) using a lift device (14, 16). And the step of performing concrete slip foam work on at least one rebar cage (18, 20), including raising the platform using a lift device (14, 16). [Selection diagram] Fig. 3

Description

The present invention relates to a slip foam device and a method of operating the slip foam device.

It is known to use slip foam to form vertical buildings or structures. Slip foam is a construction method in which concrete is injected into a continuously moving formwork to provide a cast-in-place concrete structure. The continuously moving formwork is provided by the inner and outer platforms of the concrete structure. Workers can stand on the platform and place reinforcing bars in the concrete as needed. The platform is raised by a hydraulic jack that lifts onto a steel jack rod cast into concrete. Generally, slip-foam concrete structures are constructed at a rate at which the concrete solidifies and retains its own structure and weight by the time the concrete emerges from the bottom of the formwork. The rate of increase is determined by the platform operator to ensure the quality of the concrete structure.

The problem with the known slip foam technology described above is that it is necessary to have platforms both inside and outside the concrete structure. This is not possible when it is necessary to install concrete structures on vertical shafts such as holes in the ground. Previously, this point was partially overcome by using the narrower platform of the slip foam rig while raising it from a steel rod cast into a concrete structure. However, when a high-strength concrete structure requires relatively high-density reinforcing bars (for example, 300 to 500 kgs / m ³ ), such a configuration is not possible.

From KR1012188185, a device that slip-forms only from the inside is known. Such a configuration has a platform suspended on a cable with a winch. Once the concrete has hardened, lift the platform with winches and cables. The configuration disclosed in KR101218885 has some drawbacks. The platform disclosed therein must form concrete and rebar structures in a single pass due to the configuration of the platform, and the cables that suspend the platform must be tied to the inner wall of the vertical shaft with cable stays. .. In addition, the platform disclosed in KR1012188185 is a solid circle and cannot be used to form structures inside the outer concrete formwork. Such a configuration creates operational disadvantages and limits installation options for concrete structures.

In addition, the platform disclosed in KR1012188185 may have safety drawbacks as workers may not be fully protected within the platform workspace. A further problem with the platform disclosed in KR1012188185 is that the platform may not be easily adapted to the fabrication of slip foam structures of different diameters due to its solid circular shape.

A broad object of the present invention is to address one or more of the above drawbacks of known slip foam methods and devices.

There is a need for equipment and methods that can alleviate or minimize at least some of the above problems.

According to the first aspect of the present invention, there is provided a slip foam device for constructing a primary slip foam structure from one side thereof. The device comprises a platform with multiple working levels and a lift device with at least one cable, suitable for the platform to be suspended from above by at least one cable, and the lift device lifts the platform. Alternatively, it is a slip foam device that can be operated to be lowered, and a plurality of work levels are provided around the platform and surrounds the central space through the plurality of work levels.

Such a device provides the advantage of being able to perform multiple tasks simultaneously on a primary slipform structure using multiple work levels around the platform. In addition, the lift device allows the platform to be raised and lowered as needed to perform multiple tasks in parallel or sequentially as needed. Such a configuration can improve the work flexibility of the platform, thereby reducing construction time and cost. In addition, the central space can be used to build additional features of the primary slip foam structure. It will be appreciated that each of the multiple working levels is ring shaped. This also means that the size of the platform can be easily adjusted and can be used to build primary slip foam structures of different sizes or shapes, especially relatively large structures with large diameters. During the operation of the slip foam device, the primary slip foam structure is built around the platform. Slip foam devices are most useful for constructing primary slip foam structures in underground shafts, but can also be used to prepare diaphragm walls, as described below.

Preferably, the device does not need to be fixed in place at all times when performing one or more steps of the slip foam process. Rather, the platform may be continuously raised and lowered to perform one or more steps of the slip foam process, thereby forming a platform structure.

Most preferably, the device is continuously lifted by a lift device. That is, the lift device is configured to continuously raise or lower the platform while performing any or all steps of the slip foam process. In other words, there is no need to stop the platform to perform one or more steps of the slip foam process at each path in the shaft. Instead, the slip-form process can be performed continuously when moving up and down the platform continuously. With such a configuration, construction time and cost can be reduced. Further, if a shutter is present, it is not necessary to remove or reposition and fix the shutter of the platform each time the platform is raised or lowered. Those skilled in the art will appreciate that shutters of various shapes can be used and that shutters can be added, removed or replaced to build various platform structures.

Preferably, a safety barrier is provided between the work level and the central space. Such a configuration provides the advantage that workers at multiple work levels are separated from the central space, improving safety.

Preferably, each of the plurality of work levels around the platform comprises a regular shape. With such a configuration, the primary slip foam structure can be manufactured in a regular shape.

In one embodiment, a lift device is provided above the platform and at least one cable is connected to the platform. Preferably, each lift device is installed at the ground level. Such a configuration provides a convenient way to operate the lift device and connect it to the platform to build the shaft below the surface level.

Preferably, the platform further comprises a portion for constructing a secondary slip foam structure of the primary slip foam structure, the portion extending through a plurality of work levels. The platform's ability to form such a secondary slip foam structure helps to create additional features of the primary slip foam structure, the above parts of which are operational additions to the platform as described below. Can provide the benefits of.

In one embodiment, the portion of the platform comprises a partial ring shape suitable for forming the secondary slip foam structure as a vertical tubular structure within the primary slip foam structure. In one embodiment, said portion of the platform includes at least a planar portion suitable for forming a flat internal vertical plane of the primary slipform structure. Such a secondary slip foam structure can be a useful feature of the finished concrete structure and can provide additional features to it. It will be appreciated that the primary slip foam structure or vertical tubular structure can have any cross section such as circular, square, rectangular, hexagonal and the like.

Preferably, the portion is suitable for forming a secondary slip foam structure including ducts or voids on the side walls of the primary slip foam structure.

Preferably, a safety barrier is provided between the central space and the above portion of the platform for constructing the secondary slip foam structure. Such a configuration improves the safety of workers at multiple work levels.

The lift device can include one or more winches or strand jacks, each winch or strand jack having its own cable. Such a configuration provides a convenient way to operate the lift device and can provide a plurality of fail-safe mechanisms for the slip foam device.

Preferably, the above or each winch or strand jack is interconnected by a framework of a grillage framework. That is, each of the winch and / or the strand jack can be connected to each other by a grid frame skeleton. With such a configuration, the lift device is fixed in place and the load is distributed throughout the grid frame skeleton rather than being separated into specific winches and / or strand jacks.

Preferably, the platform has a shutter that hangs from the platform to accommodate the poured concrete of the primary slip foam structure until it hardens.

Preferably, the platform includes an inner shutter and an outer shutter, the inner shutter hanging from a first working level and the outer shutter hanging from a second working level. The first and second work levels may be the same work level or different work levels. Preferably, the outer shutter hangs from the second working level via a cable. Most preferably, the outer shutter hangs through a cable at its deck beam from a second working level. The cables may include at least one or more cables fixed to the working level of the platform. Such a configuration eliminates the need for a horizontal beam through the rebar cage, which simplifies platform assembly and simplifies the slip foam process.

In another embodiment, the inner and / or outer shutters may hang from one or more winches. In certain embodiments, the outer shutter may hang from one or more winches. Such inner and / or outer shutters can be controlled by a control module and can be controlled independently of the platform and / or the other of the inner or outer shutters.

The inner and outer shutters are flush with respect to the base of the shaft. That is, the distance from the base of the shaft to the inner shutter can be x, and the distance from the base of the shaft to the outer shutter can be x. That is, the inner and outer shutters are configured so that concrete can be injected between them by arranging them facing each other.

Preferably, the platform comprises at least one work level. More preferably, the platform comprises multiple work levels. Most preferably, the platform comprises at least three work levels. Even more preferably, the platform comprises at least five working levels. In a preferred embodiment, the platform comprises exactly 3 or 5 working levels.

According to the second aspect of the present invention, there is provided a method of operating a slip foam device for constructing a primary slip foam structure in a shaft from one side thereof. The slip foam device comprises a platform having a plurality of work levels around it and surrounding the central space through the plurality of work levels, and a lift device for raising or lowering the platform.
With the step of hanging the platform from above using a lift device;
With steps to perform rebar installation work, including using a lift device to raise the platform and installing at least one rebar cage;
With the step of lowering the platform to the base of at least one rebar cage using a lift device;
Includes steps to perform concrete slip foam work on at least one rebar cage, including raising the platform using a lift device.

Such a method provides the advantage that multiple tasks can be performed simultaneously on the primary slipform structure using multiple work levels around the platform. In addition, the lift device allows the platform to be raised and lowered as needed to perform multiple tasks in parallel or sequentially as needed. Such a configuration can improve the work flexibility of the platform, thereby reducing construction time and cost. In addition, the central space can be used to build additional features of the primary slip foam structure. It will be appreciated that each of the multiple working levels is ring shaped. This also means that the size of the platform can be easily adjusted and can be used to build primary slip foam structures of different sizes or shapes, especially relatively large structures with large diameters. During the operation of the lip foam device, the primary slip foam structure is constructed around the platform. The slip foam device is most useful for constructing a primary slip foam structure in a shaft in the ground.

Preferably, when performing this method, the device need not be fixed in place at all times when performing one or more steps of the slip foam process. Rather, the platform may be continuously raised and lowered to perform one or more steps of the slip foam process, thereby forming a platform structure.

Most preferably, the method comprises using a lift device to continuously raise or lower the device. That is, the lift device can be used in any step to continuously raise or lower the platform. That is, the lift device is configured to continuously raise or lower the platform while performing any or all steps of the slip foam process. In other words, at each path in the shaft, the platform does not need to be stopped to be able to perform one or more steps of the slip foam process. Alternatively, the slipform process can be performed continuously as the platform moves up or down continuously. With such a configuration, construction time and cost can be reduced. Moreover, if a shutter is present, it is not necessary to remove or reposition and secure the shutter on the platform each time the platform is raised or lowered. Those skilled in the art will appreciate that shutters of various shapes can be used and that shutters can be added, removed or replaced to build various platform structures.

Preferably, the rebar installation operation further comprises installing the vertical rebar using one of the plurality of work levels and installing the horizontal rebar using another of the multiple work levels. .. Preferably, the concrete slip foam work further comprises pouring concrete using one of the working levels and finishing the solidified concrete using another of the working levels. Such a configuration allows different teams to perform different tasks at multiple work levels, which can improve efficiency and reduce construction time.

Preferably, the method further comprises the step of using the platform to prepare the diaphragm wall of the shaft prior to performing the rebar installation work. Preferably, the step of preparing the diaphragm wall comprises providing a waterproof barrier on the diaphragm wall. Using the platform in this way eliminates the need to install additional scaffolding within the shaft to prepare the diaphragm wall prior to constructing the primary slip foam structure.

Preferably, the method further comprises assembling the platform at the base of the shaft prior to its operation. Such a configuration provides a convenient way to operate the slip foam device.

In one embodiment, the lift device comprises one or more winches or strand jacks with their respective cables, the method described above connecting the respective cables between the platform and the top of the shaft and one or more. Further includes the step of operating the winch or strand jack to raise or lower the platform. Such a configuration provides a convenient way to operate the lift device and connect it to the platform.

Preferably, the above or each winch or strand jack is interconnected by a framework of a grillage framework. That is, each of the winch and / or the strand jack can be connected to each other by a grid frame. With such a configuration, the lift device is fixed in place and the load is distributed throughout the grid frame skeleton rather than being separated into specific winches and / or strand jacks.

Preferably, the rebar installation operation further comprises installing two or more rebar cages, in which subsequent rebar cages use a lift device to lower the platform and then raise the platform to raise the subsequent rebar. It is installed by installing a cage. Such a configuration allows subsequent rebar cages to be installed in sequence, which can improve efficiency and reduce construction time.

Preferably, the platform further comprises a portion extending through a plurality of work levels, and the method further comprises the step of constructing a secondary slip foam structure of the primary slip foam structure using the portion. The platform's ability to form such a secondary slip foam structure helps to create additional features of the primary slip foam structure, the above parts of which are operational additions to the platform as described below. Can provide the benefits of.

In one embodiment, the said portion of the platform comprises a partial ring shape, and the method comprises the step of constructing a secondary slip foam structure from a reinforcing bar as a vertical tubular structure using the partially ring shaped portion. Including, the vertical tubular structure is within the primary slip foam structure. Such a secondary slip foam structure can be a useful feature of the finished concrete structure and can provide additional functionality to it. It will be appreciated that the primary slip foam structure or vertical tubular structure can have any cross section such as circular, square, rectangular, hexagonal and the like.

Preferably, the method further comprises constructing a vertical tubular structure during rebar installation work or concrete slip foam work. Such a configuration is made possible by multiple work levels on the platform that allow multiple tasks to be performed simultaneously, i.e. in parallel.

Preferably, the method further comprises performing a concrete slip foam operation of a vertical tubular structure.

In one embodiment, said portion of the platform comprises at least a planar portion, the method comprising using the planar portion to construct a flat internal vertical plane of a primary slipform structure. Such a secondary slip foam structure can be a useful feature of the finished concrete structure and can provide additional features to it.

Preferably, the method further comprises building a secondary slip foam structure containing ducts or voids on the sidewalls of the primary slip foam structure.

Preferably, the platform has shutters hanging from the platform on one side or both sides of the primary slip foam structure and the method described above uses the shutters on one side or both sides of the primary slip foam structure. It further includes the step of containing the poured concrete until the concrete hardens. Preferably, the platform includes an inner shutter and an outer shutter, the inner shutter hanging from a first working level and the outer shutter hanging from a second working level. The first and second work levels may be the same work level or different work levels. Preferably, the outer shutter hangs from the second working level via a cable. Most preferably, the outer shutter hangs through a cable at its deck beam from a second working level. The cables may include at least one or more cables fixed to the working level of the platform. Such a configuration eliminates the need for a horizontal beam through the rebar cage, which simplifies platform assembly and simplifies the slip foam process.

In another embodiment, the inner and / or outer shutters may hang from one or more winches. In certain embodiments, the outer shutter may hang from one or more winches. Such inner and / or outer shutters can be controlled by a control module and can be controlled independently of the platform and / or the other of the inner or outer shutters.

The inner and outer shutters are flush with respect to the base of the shaft. That is, the distance from the base of the shaft to the inner shutter can be x, and the distance from the base of the shaft to the outer shutter can be x. That is, the inner and outer shutters are configured so that concrete can be injected between them by arranging them facing each other.

Preferably, the platform comprises at least one work level. More preferably, the platform comprises multiple work levels. Most preferably, the platform comprises at least three work levels. Even more preferably, the platform comprises at least five working levels. In a preferred embodiment, the platform comprises exactly 3 or 5 working levels.

According to an alternative feature of the present invention, there is provided an apparatus for preparing a diaphragm wall and constructing a primary slip foam structure from one side thereof. The device comprises one or more work levels and a lift device capable of suspending the platform from above and operating to raise or lower the platform. A primary slip foam structure is constructed on the outer periphery, which is provided on the outer periphery and surrounds the central space through the one or more working levels.

According to another alternative feature of the present invention, there is provided a slip foam method for constructing a primary concrete structure in a shaft from one side thereof. The method is:
One rebar cage is installed in the shaft from one side thereof and from its base to its top, and then another rebar cage adjacent to the one rebar cage is placed from one side thereof and from the base to the top. With the steps to install multiple rebar cages, including installing up to;
Includes a step of performing a concrete slip foam operation of a plurality of rebar cages, including pouring concrete from one side thereof and from the base to the top.

Any preferred or optional feature of one aspect or characterization of the invention can be a preferred or arbitrary feature of another aspect or characterization of the invention.

Other features of the invention will become apparent from the description of the preferred embodiments below, which are shown only by way of reference with reference to the accompanying drawings.

It is a perspective view of a vertical shaft prepared in advance in the ground. FIG. 5 is a perspective view of a slip foam device having a platform at the bottom of the shaft of FIG. 1 according to an embodiment of the present invention. It is a perspective view of the platform approximately in the middle of the shaft during the installation of the outer rebar cage. It is a perspective view of the platform at the top of the shaft after installing the outer rebar cage. It is a perspective view of the platform at the bottom of the shaft before installing the inner rebar cage. It is a perspective view of the platform approximately in the middle of the shaft during the installation of the inner rebar cage. It is a perspective view of the platform at the top of the shaft after installing the inner rebar cage. It is a perspective view of the platform at the bottom of the shaft at the start of slip foam. It is a perspective view of the platform in the middle of the shaft after forming the lower duct on the side wall of the concrete liner. It is a perspective view of the concrete liner shown in FIG. 9 which omitted the slip foam device. It is a perspective view of the platform in the middle of the shaft in the slip foam and in the installation of the secondary rebar cage. It is a perspective view of the platform in the middle of the shaft after starting the formation of the additional concrete inner liner of the concrete liner. It is a perspective view of the concrete liner shown in FIG. 12 in which the slip foam device is omitted. It is a perspective view of the platform at the top of the shaft after the slip foam is completed. FIG. 14 is a perspective view of the completed concrete liner shown in FIG. 14 with the platform removed. FIG. 3 is a perspective sectional view of a part of a platform according to an embodiment of the present invention. It is a figure which shows the step of the method by one Embodiment of this invention. FIG. 3 is a perspective sectional view of a part of a platform according to another embodiment of the present invention. FIG. 3 is a perspective sectional view of a part of the platform according to still another embodiment of the present invention. FIG. 3 is a perspective sectional view of a part of the platform according to still another embodiment of the present invention. FIG. 3 is a perspective sectional view of a part of the platform according to still another embodiment of the present invention. It is a perspective view of the winch system according to one Embodiment of this invention.

FIG. 1 is a perspective view of a vertical shaft 10 prepared in advance in the ground. The vertical shaft 10 has a pre-prepared inner wall that includes a reinforced concrete pile that is driven or cut into the ground to form the vertical shaft 10. The inner wall of the vertical shaft 10 is sometimes referred to as the diaphragm wall. The vertical shaft 10 also has a concrete foundation structure 11 at its base. The surface level is indicated by 13.

FIGS. 2-16 and 18-21 show the stages of operation of the slip foam device according to the embodiment of the present invention for forming the single-sided concrete liner 22 in the vertical shaft 10 in the ground. The concrete liner 22, also referred to as a concrete inner wall or concrete formwork, has been shown to be substantially cylindrical, but other shapes can also be formed using a slip foam device. In FIGS. 1-16 and 18, similar features are indicated by similar reference numbers. The slip foam device comprises a platform 12 suspended on a shaft 10 by a cable 14 each connected to each winch 16. Platform 12 is sometimes referred to as a slip foam rig. One or more winches 16 may be referred to as an alternative lift device. Eight cables 14 are shown, but the number of cables 14 required depends on the diameter of the shaft 10, and a shaft 10 with a larger diameter usually requires more cables 14. Each winch 16 is mounted at surface level 13 so that each cable 14 is substantially vertical. The platform 12 can be raised or lowered by cables 14 and winches 16 as needed.

A control module (not shown) is used to operate the winches 16 simultaneously to ensure that the ascent or descent of the platform 12 occurs substantially simultaneously. In some embodiments, the control module (not shown) can operate the winch 16 and lift the inner and / or outer shutters (see, eg, FIG. 21) independently of the platform 12. This may be advantageous, for example, to provide an infill or portal first and then a liner wall. That is, during the construction of the infill, a single shutter (inner shutter) can be utilized and a secondary outer shutter can be utilized to construct the liner wall independently of the platform and inner shutter. .. Such a constructed slip foam structure is shown in FIG. 21 and will be further described below.

In one configuration, each winch 16 comprises a mast with a boom (ie, a crane) for carrying its respective cable 14. Each winch 16 also has its own electric motor and cable reel configuration (not shown) for carrying its own cable 14. In some embodiments, the winches 16 can be interconnected via a grillage framework or the like, as described below in connection with FIG.

FIG. 2 is a perspective view of a slip foam device provided with a platform 12 at the bottom of the shaft 10. It will be appreciated that the platform 12 needs to be assembled at the base of the shaft 10 before connecting the cable 14 between the winch 16 and the platform 12. In other words, the platform 12 needs to be assembled within the vertical shaft 10 at the lowest point of the vertical shaft 10 prior to use of the platform 12. In an alternative configuration, the platform 12 is partially or fully assembled at surface level 13 and suspended at the top of the shaft 10 before connecting the cable 14 between the winch 16 and the platform 12.

A brief reference to FIG. 16 showing a partial perspective sectional view of the platform 12 shows that the platform 12 has three working levels 28, 30, 32 around it. The three working levels 28, 30, 32 surround the central space, which is the through hole of the three working levels 28, 30, 32, generally represented by 33. In other words, the platform 12 is ring-shaped or so that each work level 28, 30, 32 is ring-shaped or annular so that each work level 28, 30, 32 is a passage around the perimeter of the platform. It is shown to be circular. In the configuration shown in FIG. 16, a portion of the ring-shaped platform 12 is shown to be a normal ring, i.e. circular, and the entire platform 12 with working levels 28, 30, 32 is shown to be tubular. Has been done. However, in the configuration shown in FIGS. 2-15, the ring-shaped platform 12 also has other features such as a flat portion 15 and an internal circular portion 17, which provide additional working advantages as described below. And create additional features in the concrete liner 22. The flat portion 15 of the platform 12 may also be provided with stairs (not shown) so that workers can access between work levels 28, 30, 32. The flat portion 15 and the internal circular portion 17 extend through a plurality of working levels 28, 30, 32. It will be appreciated that the flat portion 15 is a planar portion of the platform 12. Further, the internal circular portion 17 has a partially cylindrical shape or a partially ring shape of the platform 12. Although three work levels 28, 30, 32 are shown, it will be appreciated that more or less work levels 28, 30, 32 may be provided.

Referring again to FIG. 2, after assembling the platform 12 at the bottom of the shaft 10, the winch 16 can be operated to raise the platform 12 to the top of the shaft to complete the first pass of the platform 12 within the shaft 10. it can. During such an initial pass, workers at multiple working levels 28, 30, 32 may prepare the diaphragm wall of the shaft 10 by providing a waterproof membrane if it is necessary to provide a water barrier. it can. After the waterproof membrane is installed, the winch 16 lowers the platform 12 again to the lowest point of the shaft 10, as shown in FIG. 2, and the second pass is ready, as shown in FIG.

FIG. 3 is a perspective view of the platform 12 substantially in the middle of the shaft 10 while the outer rebar cage 18 is installed. The outer rebar cage 18 is sometimes referred to as the distant rebar cage. It will be appreciated that the outer rebar cage 18 is the outer layer of the rebar and can contain three vertical layers of rebar in close proximity to each other and are connected to each other by a pre-bent horizontal bar known as a racer. .. The outer rebar cage 18 is sometimes referred to as the outer layer. A hole 19 in the outer rebar cage 18 is also shown, which hole 19 is used to form the lower duct 21 on the side wall of the concrete liner 22, as shown in FIG. A shutter (not shown) around the hole 19 of the outer rebar cage 18 is also installed. The flat portion 15 of the platform 12 is useful when a worker forms a hole 19 in the outer rebar cage 18 and installs a shutter around the hole 19. The lower duct 21 is sometimes called an opening. Alternatively, voids on the side walls of the concrete liner 22 may be formed using a platform, if desired. The void does not necessarily have to be a duct.

FIG. 4 is a perspective view of the platform 12 on the upper part of the shaft 10 after the outer rebar cage 18 is installed. When the outer rebar cage 18 is completed, the platform 5 returns to the base of the shaft 10 as shown in FIG. 5 and is ready to install the inner rebar cage 20 as shown in FIG.

FIG. 6 is a perspective view of the platform 12 substantially in the middle of the shaft 10 while the inner rebar cage 20 is installed. The internal rebar cage 20 is also sometimes referred to as the near rebar cage instead. Holes 19 in the outer rebar cage 18 and the inner rebar cage 20 are also shown, which holes 19 are used to form the lower duct 21 in the concrete liner 22, as shown in FIG. A shutter (not shown) around the hole 19 of the inner rebar cage 20 is also installed. The flat portion 15 of the platform 12 is useful when a worker forms a hole 19 in the inner rebar cage 20 and installs a shutter around the hole 19.

FIG. 7 is a perspective view of the platform 12 at the top of the shaft 10 after the inner rebar cage 20 is installed. The inner rebar cage 20 can also include three vertical layers of rebar that are in close proximity to each other and are connected to each other by pre-bent horizontal racers. The inner rebar cage 20 is sometimes referred to as the inner layer. The outer rebar cage 18 and the inner rebar cage 20 can be collectively referred to as a primary rebar cage. The concrete liner 22 can be called a primary slip foam structure. Space is also provided between the outer rebar cage 18 and the inner rebar cage 20. If necessary, an intermediate layer of reinforcing bars may be provided in the space between the outer reinforcing bar cage 18 and the inner reinforcing bar cage 20. The intermediate layer can be installed with the inner rebar cage 20 and may include a link between the outer rebar cage 18 and the inner rebar cage 20. In other words, the intermediate layer can be installed in the same path on the platform 12 as the inner rebar cage 20 is installed so that the inner rebar cage 20 and the intermediate rebar cage form one rebar cage. .. When the inner rebar cage 20 is complete, the platform 12 is returned to the base of the shaft 10 as shown in FIG. 8 and is ready to begin the slip foam, i.e., the step of pouring concrete.

FIG. 8 is a perspective view of the platform 12 at the bottom of the shaft 10 at the start of slip foaming of the concrete liner 22. As shown in FIG. 8, the platform 12 is directly above the base of the shaft 10 after the start of slip foam, whereby the concrete liner 22 is formed directly on the concrete foundation structure 11. It will be understood that concrete is poured from surface level 13 through pipes (not shown).

FIG. 9 is a perspective view of the platform 12 in the middle of the shaft 10 after the lower duct 21 is formed on the side wall of the concrete liner 22. Platform 12 is omitted for clarity. As shown in FIG. 10, the flat portion 15 of the platform 12 is useful when the worker attaches the rebar and the shutter to form the lower duct 21. 9 and 10 show a concrete liner 22 having a height of about 9.5 m.

FIG. 11 is a perspective view of the platform 12 in the middle of the shaft 10 in the slip form and during the installation of the secondary rebar cage 24. The secondary rebar cage 24 is a tubular structure of rebar that can be used to form additional inner concrete liners 26 as needed, as shown in FIG. The additional inner concrete liner 26 may be referred to as a secondary slip foam structure. The secondary rebar cage 24 is connected to the inner rebar cage 20 using a link. As shown in FIG. 11, the secondary rebar cage 24 is inside the primary rebar cages 18 and 20, and each of the primary rebar cages 18 and 20 and the secondary rebar cage 24 are cylindrical, respectively, substantially. Has an axis parallel to and not coaxial with. It will also be appreciated that the plurality of levels 28, 30, 32 of the platform 12 allows the secondary rebar cage 24 to be assembled during slip forming of the concrete liner 22. As shown in FIG. 11, the internal circular portion 17 of the platform 12 surrounds the secondary rebar cage 24, which is useful as it helps the worker to form the secondary rebar cage 24. In addition, the inner circular portion 17 is useful as it helps when pouring concrete around the additional inner concrete liner 26. In this way, the slip foam device according to the embodiments disclosed herein can be used to make a concrete liner 22 with additional internal structures such as a lower duct 21 and an additional inner concrete liner 26.

FIG. 12 is a perspective view of the platform 12 in the middle of the shaft 10 after starting the formation of the additional inner concrete liner 26 (shown in FIG. 13) of the concrete liner 22. Platform 12 is omitted for clarity. The inner concrete liner 26 can be used to accommodate a steel vent pipe if it needs to be installed within the shaft 10. As shown in FIG. 13, the base 27 of the inner concrete liner 26 extends halfway through the concrete liner 22, and the inner concrete liner 26 and the concrete liner 22 are integrally formed during the slip foam process. 12 and 13 show a concrete liner 22 having a height of about 21.7 m. The inner circular portion 17 of the platform 12 is useful when a worker attaches a shutter (not shown) to form the inner wall of the base 27 and the inner concrete liner 26. The concrete liner 22 or the inner concrete liner 26 can have any cross section with through holes, such as circular, square, rectangular, hexagonal, etc.

FIG. 14 is a perspective view of the platform 12 at the top of the shaft 10 after the slip foam of the concrete liner 22 is completed. FIG. 15 shows a perspective view of the completed concrete liner 22 shown in FIG. 14 with the platform 12 removed. As shown in FIG. 14, the top 29 of the inner concrete liner 26 terminates in front of the top 31 of the concrete liner 22. 14 and 15 show a concrete liner 22 having a height of about 47.0 m. It will be appreciated that the base 27 and top 29 of the inner concrete liner 26 may extend to the base and top of the concrete liner 22, if desired.

Referring again to FIG. 16, there are internal safety walls 34, 36, 38 at each level 28, 30, 32, which completely surrounds the worker at each level 28, 30, 32 and separates the worker from the central space. ing. The internal safety walls 34, 36, 38 also extend around the flat portion 15 and the internal circular portion 17 described above. Each safety wall 34, 36, 38 includes a vertical panel or fence between each level 28, 30, 32 and the central space 33. Such a configuration improves the safety of workers at levels 28, 30, and 32. It will be appreciated that each level 28, 30, 32 includes a substantially horizontal passage that can be any suitable material such as wood. Each level 28, 30, 32 extends radially along the platform 12 and is supported by a plurality of deck beams 35 spaced around the platform 12. Although only the top deck beam 35 at top level 28 is shown, it will be appreciated that the middle deck beam is provided at intermediate level 30 and the lower deck beam is provided at lower level 32. Each safety wall 34, 36, 38 is hung on a post 39 connected to its respective deck beam. A shutter 40 is also shown below the intermediate level 30 so that the concrete liner 22 can be formed when the concrete is poured at the intermediate level 30. It will be appreciated that the shutter 40 is suspended around the perimeter of the platform 12. In the illustrated embodiment, the shutter 40 is suspended from the intermediate level 30. The shutter 40 is also suspended from the intermediate level 30 at the flat portion 15 and around the internal circular portion 17. The shutter can be any suitable panel for containing the poured concrete until it hardens. A vertical beam 42 is also shown between adjacent deck beams at levels 28, 30, and 32.

From the above description, it can be seen that the central space 33 of the platform 12 offers the advantage of being able to form additional concrete structures such as the lower duct 21 and the inner concrete liner 26 (see FIGS. 10 and 15). In addition, the three work levels 28, 30, 32 allow different teams of workers to install different parts of the inner and outer cages 18, 20 as described above. For example, one team at the upper level 32 installs vertical rebar, another team at the middle level 30 installs a pre-bent horizontal racer, and another team at the lower level 28 is also horizontal. A racer server can be installed. In another example, one team pours concrete at intermediate level 30, another team at lower level 28 finishes the concrete surface set with trowel or brush finish, and if necessary, another team at upper level 32. Can install the secondary rebar cage 24. Each of the three working levels 28, 30, 32 is about 3 m high so that the entire platform is about 9 m high. Such a configuration allows the use of relatively long 12 meter vertical rebar cages when installing the rebar cages 18, 20, 24, which is the time required to build the primary and secondary rebar cages. Helps to shorten. In addition, there are three work levels 28, 30, 32, which allows more workers to work on platform 12 at a given time, which further helps reduce construction time.

FIG. 17 shows the steps of the method according to an embodiment of the invention, generally represented by 50. It will be appreciated that the steps may be performed in a different order and may not necessarily be performed in the order shown in FIG. Method 50 is a method of operating a slip foam device to construct a primary slip foam structure 22 in the shaft 10 from one side thereof, in which the slip foam device has a plurality of work levels 28, 30, 32 around it. A platform 12 that surrounds the central space 33 via the plurality of working levels 28, 30, 32, and lift devices 14, 16 that raise or lower the platform 12. This method involves suspending the platform from above using lift devices 14, 16 and raising the platform using lift devices 14, 16 to raise at least one rebar cage 18, 20 as shown in 52. Use the lift devices 14, 16 and the steps to perform the rebar installation work, including installation, and the steps to lower the platform 12 to the base of at least one rebar cage 18, 20 using the lift devices 14, 16. Includes a step of performing concrete slip foam work on at least one rebar cage 18, 20 including raising the platform 12.

This method uses one of multiple work levels 28, 30, 32 for one construction work and another of multiple work levels 28, 30, 32 for another construction work, as shown in 54. Including to use. For example, as shown in 54, in the reinforcing bar installation work, one of the plurality of work levels 28, 30, 32 is used to install the vertical reinforcing bar, and another of the plurality of work levels 28, 30, 32 is installed. It further includes installing horizontal rebar using stuff. For example, as shown in 54, for concrete slip foam work, one of the plurality of work levels 28, 30, 32 is used to pour concrete, and another of the plurality of work levels 28, 30, 32 is used. It also includes finishing the hardened concrete.

The method further comprises the step of preparing the diaphragm wall of the shaft 10 using the platform 12 prior to performing the rebar installation work, as shown in 56. The step of preparing the diaphragm wall involves installing a waterproof barrier there. The method further comprises assembling the platform 12 at the base of the shaft prior to its work, as shown in 58.

The lift device comprises one or more winches or strand jacks 16 with their respective cables 14, the method connecting the respective cables 14 between the platform 12 and the top of the shaft 10, as shown in 60. It further comprises operating one or more winches or strand jacks 16 to raise or lower the platform 12.

As shown in 62, the rebar installation work further includes installing one or more rebar cages 18, 20 in which subsequent rebar cages lower the platform 12 and then lift devices 14, 16 Is installed by raising the platform 12 and installing subsequent rebar cages using.

The platform further includes a portion extending through multiple work levels, and this method further comprises constructing a secondary slip foam structure of a primary slip foam structure using the portion, as shown in 64. Including.

In one configuration, that portion of the platform 12 includes a partially ring-shaped portion 17, which method uses the partially ring-shaped portion 17 to vertically rotate the secondary slip foam structure from the rebar, as shown in 64. The vertical tubular structure is within the primary slip foam structure, including the step of constructing as a tubular structure. The method further comprises constructing the vertical tubular structure 24 during the rebar installation work or the concrete slip foam work, as shown in 64. The method further comprises performing a concrete slip foam operation of the vertical tubular structure 24, as shown in 64.

In one configuration, the portion of the platform comprises at least a portion thereof that is a plane 15, and the method uses the portion 15 to flatten the interior of the primary slipform structure 22 as shown in 64. Includes building vertical planes. The method further comprises constructing a secondary slip foam structure with a duct 21 on the side wall of the primary slip foam structure 22, as shown in 64.

FIG. 18 is a perspective sectional view of a part of the platform 12 according to another embodiment of the present invention. The cable 14 for suspending the platform 12 is omitted in FIG. 18 for clarity. Platform 12 shown in FIG. 18 is similar to platform 12 in FIG. 16 except for an additional outer shutter 41 opposite the concrete liner 22 with respect to the shutter 40. In FIG. 18, the shutter 40 can be referred to as the inner shutter, and the concrete liner 22 is formed between the inner shutter 40 and the outer shutter 41 with the platform 12 substantially on one side of the concrete liner 22. .. In the illustrated embodiment, the outer shutter 41 is at or directly below the intermediate level 30 so that the concrete liner 22 can be formed when the concrete is poured at the intermediate level 30. The outer shutter 41 hangs around the outer circumference of the platform 12 such that the outer shutter 41 hangs at or just below the intermediate level 30. The outer shutter 41 also hangs from the intermediate level 30 around the flat portion 15 and the inner circular portion 17. The outer shutter 41 can be any panel suitable for accommodating the poured concrete until it hardens. The outer shutter 41 is connected to the outer vertical beam 45. The outer vertical beam 45 is connected to the upper and lower horizontal beams 43. Both the upper and lower horizontal beams 43 are connected to the vertical beam 42 at an intermediate level 30. In this way, when the platform 12 moves, the outer shutter 41 moves. The upper and lower horizontal beams 43 pass through the outer and inner rebar cages 18 and 20 and are not obstructed by pre-bent horizontal racers as they move upwards. The pre-bent horizontal racer can be installed under the lower horizontal beam 43 in the outer and inner rebar cages 18 and 20 at intermediate level 30 before starting the pouring of concrete.

It will be appreciated that the outer shutter 41 is between the concrete liner 22 and the diaphragm wall of the shaft 10 and allows the outer surface of the concrete liner 22 to be finished at least to some extent, but the outer surface of the concrete liner 22 It will be understood that it is not finished with concrete or brush. If necessary, a space 47 that can be backfilled with aggregate is formed between the concrete liner 22 and the diaphragm wall of the shaft 10.

The slip foam device shown in FIG. 18 has a primary slip foam structure (ie, one or more rebar cages 18,) from one side of the outer shutter 41, even though the outer shutter 41 is on the opposite side of the primary slip foam structure. It will also be appreciated that 20 and the concrete liner 22) are practically suitable for construction. The inner and outer shutters 40, 41 are shown to hang from intermediate level 30, but may hang from any level on platform 12.

With reference to FIG. 19, a perspective sectional view of another embodiment of the platform 12 is shown. In FIG. 19, the cable 14 is omitted for clarity. As described with respect to FIG. 16, it can be seen that the platform 12 has three working levels 28, 30, 32 around it. The three working levels 28, 30, 32 surround the central space, commonly represented by 33. The central space 33 is a through hole for three working levels 28, 30, and 32. In other words, the platform 12 is ring-shaped so that each work level 28, 30, 32 is ring-shaped or annular, whereby each work level 28, 30, 32 is a passage around the perimeter of the platform 12. Or it is shown to be circular. In the configuration shown in FIG. 19, a portion of the ring-shaped platform 12 is shown to be a normal ring, i.e. circular, and the entire platform 12 with working levels 28, 30, 32 is tubular. However, as shown in the configurations of FIGS. 2-15, the ring-shaped platform 12 of this embodiment may also have other features such as a flat portion 15 and an internal circular portion 17. Also, for those skilled in the art, the platform of FIG. 19 has more or less work levels, such as one, two, three, four, five, or six or more work levels. It will also be understood that it may be.

Platform 12 of FIG. 19 is similar in structure to the platforms of FIGS. 16 and 18. That is, the platform of FIG. 19 includes a plurality of working levels 28, 30, 32 interconnected by a vertical beam 42. The platform includes internal safety walls 34, 36, 38 provided at each of the work levels 28, 30, 32, and completely surrounds the worker at each work level 28, 30, 32. The internal safety walls 34, 36, 38 also extend around the flat portion 15 and the internal circular portion 17 (see FIGS. 2 to 15). The internal safety walls 34, 36, 38 are provided with vertical panels of fences between each level 28, 30, 32 and the central space 33. The internal safety walls 34, 36, 38 are hung on posts 39, respectively, at work levels 28, 30, 32, respectively. Such a configuration improves the safety of workers at levels 28, 30, and 32. It will be appreciated that each level 28, 30, 32 comprises a substantially horizontal passage, which can be any suitable material such as wood. Each working level 28, 30, 32 extends in the radial direction of the platform 12 and is supported by a plurality of deck beams 35 spaced around the platform 12. For clarity, FIG. 19 shows only the top deck beam 35 at top level 28. As mentioned above for the platforms of FIGS. 16 and 18, the platform 12 of FIG. 19 is connected to the winch (not shown) by a cable (not shown) so that the slip foam process can be performed.

Platform 12 is shown as having a single shutter 40. In the illustrated embodiment, the shutter 40 is at or directly below the intermediate level 30 so that the concrete liner 22 can be formed when the concrete is poured at the intermediate level 30. The single shutter 40 can be hung directly from the intermediate level 30 by connecting to the working level 30 via a vertical beam 42. In an alternative embodiment, although not shown, a single shutter 40 may hang from another working level by another means, for example, the shutter 40 may hang from a deck beam by a cable. Good.

In the illustrated embodiment, the concrete liner 22 is formed without a space between the concrete liner 22 and the shaft 10 (see space 47 in FIG. 18). That is, in the illustrated embodiment, the concrete liner 22 is formed as an infill on the working surface of the shaft 10 or on the diaphragm wall. As described above, the shutter 40 can be any suitable panel for accommodating the poured concrete until it hardens.

It is understood that the slip foam device shown in FIG. 19 is suitable for constructing a primary slip foam structure (one or more rebar cages (not shown) and a concrete liner 22) substantially from one side thereof. Yeah. Although the shutter 40 is shown to hang from intermediate level 30, it can hang from any level on platform 12.

With reference to FIG. 20, a perspective sectional view of another embodiment of the platform 12 is shown. In FIG. 20, for clarity, the cable 14 for suspending the platform 12 is omitted. The shaft 12 of FIG. 20 is most similar to that described with respect to FIG. 19, and the technical elements described with respect to FIG. 19 are equally applied to those having similar reference numbers in FIG. 20 and are as described above. .. The difference between the embodiments of FIGS. 19 and 20 is that the shaft 12 of FIG. 20 operates further inward, i.e. towards the central axis of the shaft 10 (ie, further away from the working surface of the shaft 10). In some embodiments, the platform 12 can have a diameter of a size that achieves the desired infill. In the embodiment of FIG. 20, a larger infill, i.e. a thicker concrete liner 22, can be achieved. The principle and structure of the shaft 12 of FIG. 20 are the same as those described in FIGS. 2-16, 18 and 19.

Next, with reference to FIG. 21, yet another embodiment of the shaft 12 is shown. The shaft 12 of FIG. 21 is similar in structure to that shown in FIGS. 16, 18, 19 and 20, but contains additional work levels. The same technical elements described in FIGS. 16 and 18-20 apply equally to those having similar reference numbers in FIG. 21 and are as described above.

Further, the concrete liner 22 may be formed in two stages, the first stage is the stage shown in FIGS. 19 and 20, and the second stage is the stage shown in FIG. 21. That is, firstly, the infill can be constructed according to FIGS. 19 and 20, and secondly, the concrete liner can be formed using the shutter described below. Construction of such concrete liners can include platforms with any structure (such as the number of shapes, sizes or working levels), as described herein.

FIG. 21 shows a fourth work level 70 and a fifth work level 72. The fourth work level 70 and the fifth work level 72 include internal safety walls 74, 76 hung on posts 39 to surround workers on the respective work levels 70, 72. Additional work levels 70,72 can be constructed in the same manner or in the same manner as those work levels 28, 30, 32 described above. In this way, platform 12 includes five working levels 28,30,32,70,72. Such a configuration provides more flexibility for platform users in that multiple tasks can be performed simultaneously in a primary slipform structure. For example, as shown in FIG. 21, with additional work levels 70,72, different teams of workers install different sides of the slip foam structure (eg, inner and outer rebar cages 18, 20). can do.

The embodiment of FIG. 21 can employ the configuration and / or shutter of any of the other embodiments described. For example, the shaft 12 of FIG. 21 may include a single shutter (see in particular FIGS. 19 and 20), or may include inner and outer shutters 40, 41 as shown in FIG. Good. Further, the inner and outer shutters 40, 41 may be constructed in a manner similar to that shown in FIG. 18, or as described below with reference to the particular embodiment of FIG. It may be constructed.

As can be seen in FIG. 21, the inner shutter 40 hangs down from the second working level 30. However, those skilled in the art will appreciate that the inner shutter 40 may hang from any one of working levels 28, 30, 32, 70, 72. The outer shutter 41 of FIG. 21 is shown to hang down from the fifth working level 72, preferably in the deck beam 78, via the cable 80. Again, it will be appreciated that the outer shutter 41 may hang from any of working levels 28, 30, 32, 70, 72. As shown in FIG. 21, the use of the cable 80 eliminates the need for a horizontal beam through the rebar cages 18 and 20 as shown in FIG. Alternatively, the inner and / or outer shutters 40, 41 may hang down so that they can be controlled independently of the platform 12. For example, the inner and / outer shutters 40, 41 can be hung on a winch (not shown) that is controlled independently of the winch (not shown) that suspends the platform.

Additional work levels 70,72 allow the outer rebar cage 18 to be installed before the inner rebar cage 16. In this way, the reinforcing bars 16, 18 can be installed without the need for additional joints of the reinforcing bars 16, 18 and thus reduce the labor requirements for installing such reinforcing bars 16, 18. be able to. Such a structure of platform 12 enables safe and economical installation of reinforcing bars 16, 18.

Those skilled in the art will appreciate that the cable 80 may include any number of cables having the desired properties (ie, material, diameter, etc.) suitable for use in this situation. Those skilled in the art will also apply the configuration of this embodiment equally to platforms having any number of work levels, eg, one, two, three, four, five or six or more work levels. You will understand that.

Finally, FIG. 22 shows one embodiment of the lift device 100 that raises or lowers the platform 12 described in any one of the above embodiments. The lift device 100 includes one or more winches 116 and associated cables 114 for suspending a platform (not shown) during construction of the primary slip foam structure 122.

As described above, a control module (not shown) is used to operate the winch 116 simultaneously so that the platform (not shown) can be raised or lowered substantially simultaneously. In some embodiments, the control module (not shown) may operate the winch 116 to lift the inner and / or outer shutters (see, eg, FIG. 21) independently of the platform (not shown). it can. This may be advantageous, for example, to provide an infill or portal first and then a liner wall. That is, during the construction of the infill, a single shutter (inner shutter) can be utilized and a secondary outer shutter can be utilized to construct the liner wall independently of the platform and inner shutter. .. Such a constructed slip foam structure is shown in FIG.

In one configuration, the winch 116 comprises a mast with a boom (ie, a crane) carrying each cable 114. Each winch 116 also has its own motor and cable reel configuration (not shown) for carrying its own cable 114. In the illustrated embodiment, the lift device 100 includes a grid frame skeleton 101 that connects each of the winches 116 to each other and thereby secures the lift device 100.

The above embodiments described herein allow the platform 12 to be raised or lowered as needed to allow full installation of all rebar and void formwork (ie, shutters), so that complete. It offers the advantage that the installation can be inspected and finished before the concrete pouring begins. In addition, the embodiments described herein make it possible to perform additional tasks such as installing a waterproof liner on the diaphragm wall or preparing for the addition of the diaphragm wall. This eliminates the need to install a separate access platform or complete scaffolding within the shaft 10 to install the waterproof liner prior to the installation of the inner and outer layers 18 and 20 of the rebar or the installation of the inner concrete liner 26. Therefore, the platform 12 is highly flexible in work and can save time and money for constructing the concrete structure 22. Moreover, the embodiments described herein can complete the concrete arrangement without interruption from the base of the shaft 10 to its top.

The above embodiment makes it possible to produce the concrete foams 22 and 26 with higher finish quality, and also shortens the overall construction time of the concrete foams 22 and 26, thereby reducing the construction cost. For example, the conventional method of constructing concrete foams 22 and 26 may take about 20 weeks, but by using the apparatus and method of the above embodiment of the present invention, the construction time of concrete foams 22 and 26 can be reduced to about 20 weeks. It can be shortened to 10 weeks.

The above embodiments relate to devices and methods for forming concrete structures on vertical shafts that are accessible only from one side thereof. In particular, this device and method suspends the platform 12 from the top of the shaft to prepare the diaphragm wall, install one or more rebar cages for the additional rebar structure of the concrete liner 22, pour concrete and concrete. It relates to raising and lowering the platform 12 when finishing. In the above embodiment, the winch 16 is shown to be at surface level 13, but in an alternative embodiment, the winch is such that the top of each cable 14 is connected at surface level 13 or at the top of the shaft 10. 16 can be attached to the platform 12.

In the above embodiments described herein with reference to FIGS. 2-16, 18 and 21, the rebar cages 18, 20, 24 are shown at a density of 25% for clarity. However, the actual embodiment will have 100% or more to provide the required strength for the finished concrete liners 22, 26.

From the above, it will be understood that the installation of the reinforcing bar cages 18, 20 and 24 is performed during each lift operation (that is, ascending from the low point to the high point of the platform 12). In other words, the outer rebar cage 18 is installed from the platform 12 when raising the platform 12 from the low point to the high point, and then the inner rebar cage 20 lowers the platform 12 again and then the platform 12 Is installed from platform 12 when ascending from low to high, then the platform 12 is lowered again and then concrete is poured to form the concrete liner 22, and then the rebar cage 24 is made of concrete. It is installed from the platform 12 when the platform 12 is raised from a low point to a high point while pouring. Thus, certain actions, such as the installation of the outer rebar cage 18 followed by the installation of the inner rebar cage 20, are performed continuously (ie, one after the other), while the concrete pouring and additional rebar cage 24 It will be appreciated that the installation can be done in parallel (ie, at the same time). Such a configuration provides greater operational flexibility for the slip foam apparatus according to the embodiments described herein.

The inner portion 17 of the platform 12 is shown to be partially circular, but the inner portion 17 may have any other shape as needed to provide an alternative shape to the additional inner concrete liner 26. It will be understood that it can be used. In addition, the additional inner concrete liner 26 may be in solid form such that it is non-tubular, or has through holes as shown in FIGS. 13 and 15 as it is tubular. You may be. It will be appreciated that if the additional inner concrete liner 26 is tubular, the inner portion 17 of the platform 12 must be ring-shaped (or partially ring-shaped) with a central hole.

The above embodiments illustrate the use of one or more winches 16,116 to lift the platform 12 with cables 14,114. In one alternative configuration, one or more strand jacks are used instead of the winches 16,116. Any suitable lift device, such as a winch or strand jack that uses cables 14, 114, may be used provided that the lift device has sufficient lifting capacity to lift the platform 12 by cables 14, 114. Will be understood. The grid frame skeleton 101 can be used in any embodiment of the lift device 100, regardless of the type or quantity of winches 16,116 used.

Claims (30)

A slip foam device for constructing a primary slip foam structure from one side thereof comprises a platform having multiple working levels and a lift device having at least one cable, wherein the platform is from above by said at least one cable. A slip foam device suitable for suspension and capable of the lift device operating to raise or lower the platform, wherein the plurality of working levels are provided around the platform. A slip foam device that surrounds a central space through multiple work levels. The slip foam device according to claim 1, wherein a safety barrier is provided between each work level and the central space. The slip foam device according to claim 1 or 2, wherein each of the plurality of working levels around the platform comprises a regular shape. The slip foam device according to any one of claims 1 to 3, wherein the lift device is provided above the platform and the at least one cable is connected to the platform. Claims 1 to 4, wherein the platform further comprises a portion for constructing a secondary slip foam structure of the primary slip foam structure, the portion extending through the plurality of work levels. The slip foam device according to any one of the following items. The slip foam device of claim 5, wherein said portion of the platform comprises a partially ring shape suitable for forming the secondary slip foam structure as a vertical tubular structure within the primary slip foam structure. The slip foam apparatus according to claim 5, wherein said portion of the platform comprises at least a planar portion suitable for forming a flat internal vertical plane of the primary slip foam structure. The slip foam according to any one of claims 5 to 7, wherein the portion is suitable for forming the secondary slip foam structure including a duct or a void on the side wall of the primary slip foam structure. apparatus. 5. 8 when the safety barrier is dependent on claim 2, which is provided between the central space and the portion of the platform for constructing the secondary slip foam structure. The slip foam device according to any one of the above. The slip foam device according to any one of claims 1 to 9, wherein the lift device comprises one or more winches or strand jacks, each winch or strand jack having its own cable. The slip foam device according to claim 10, wherein the winch or the strand jack is connected to each other by a frame of a lattice frame. The slip according to any one of claims 1 to 11, wherein the platform has a shutter that hangs from the platform to accommodate the poured concrete of the primary slip foam structure until it hardens. Foam device. 12. The slip according to claim 12, wherein the platform includes an inner shutter and an outer shutter, the inner shutter hangs from a first working level, and the outer shutter hangs from a second working level via a cable. Foam device. A method of operating a slip foam device for constructing a primary slip foam structure in a shaft from one side thereof, wherein the slip foam device has a plurality of work levels around it and is centered through the plurality of work levels. It is equipped with a platform that surrounds the space and a lift device that raises or lowers the platform:
With the step of suspending the platform from above using the lift device;
With the steps of performing a rebar installation operation, including using the lift device to raise the platform and installing at least one rebar cage;
With the step of lowering the platform to the base of the at least one rebar cage using the lift device;
A method comprising performing a concrete slip foam operation of the at least one rebar cage, comprising raising the platform using the lift device. The rebar installation work further comprises installing vertical rebars using one of the plurality of work levels and installing horizontal rebars using another of the plurality of work levels. , The method according to claim 14. A claim further comprising the concrete slip foam operation pouring the concrete using one of the plurality of work levels and finishing the solidified concrete using another of the plurality of work levels. 14 or 15. The method of any one of claims 14-16, further comprising the step of preparing the diaphragm wall of the shaft using the platform prior to performing the rebar installation operation. 17. The method of claim 17, wherein the step of preparing the diaphragm wall comprises providing a waterproof barrier to the diaphragm wall. The method of any one of claims 14-18, further comprising assembling the platform at the base of the shaft prior to that work. The lift device comprises one or more winches or strand jacks with their respective cables.
Claims 14-19, further comprising connecting the respective cables between the platform and the top of the shaft and operating the one or more winches or strand jacks to raise or lower the platform. The method according to any one item. 20. The method of claim 20, wherein the winches or strand jacks are interconnected by a grid frame skeleton. The rebar installation operation further comprises installing two or more rebar cages, in which subsequent rebar cages use the lift device to lower the platform and then raise the platform to raise the subsequent rebar. The method according to any one of claims 14 to 21, which is installed by installing a cage. 14. The platform further comprises a portion of the platform extending through the plurality of work levels, further comprising the step of constructing a secondary slip foam structure of the primary slip foam structure using the portion. The method according to any one of 22. The vertical tubular structure comprises a step of constructing the secondary slip foam structure from a reinforcing bar as a vertical tubular structure using the partially ring-shaped portion of the platform. 23. The method of claim 23, which is located within the primary slip foam structure. 24. The method of claim 24, further comprising constructing the vertical tubular structure during the rebar installation work or the concrete slip foam work. 25. The method of claim 25, further comprising performing the concrete slip foam work of the vertical tubular structure. 23. The method of claim 23, wherein said portion of the platform comprises at least a planar portion and the planar portion is used to construct a flat internal vertical plane of the primary slipform structure. The method according to any one of claims 23 to 27, further comprising a step of constructing the secondary slip foam structure including a duct or a void on the side wall of the primary slip foam structure. The platform has shutters hanging from the platform on one or both sides of the primary slip foam structure, and the shutter is used to pour concrete into one or both sides of the primary slip foam structure. The method according to any one of claims 14 to 28, further comprising a step of containing the concrete until it hardens. 29. The method of claim 29, wherein the platform includes an inner shutter and an outer shutter, the inner shutter hangs from a first working level, and the outer shutter hangs from a second working level via a cable. ..

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