Apparatus and method for slipform construction

Abstract

To eliminate various problems caused by a countermeasure for preventing buckling of a climbing rod.SOLUTION: Disclosed is a device for slipform construction, comprising a yoke for holding a formwork or a structural member which also functions as a formwork, a jack for raising the yoke, and a climbing rod for supporting the yoke, characterized in that the climbing rod is supported at a support point located above the yoke.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to apparatus and methods for slipform construction. [Background technology]

[0002] Methods and apparatus for forming structures using slip-form construction are known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-59337 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned conventional technology, the climbing rod of the climbing mechanism that raises the yoke is subjected to a compressive load due to the weight of the yoke, so measures must be taken to prevent the climbing rod from buckling. Various such measures exist, such as lowering the mounting height of the lifting jack to shorten the buckling length, but all of these have problems such as reduced workability.

[0005] Therefore, the present disclosure aims to eliminate various problems caused by measures to prevent buckling of climbing rods. [Means for solving the problem]

[0006] In one aspect, there is provided an apparatus for slipform construction, comprising: a yoke for holding a form or a structural member that also functions as a form; a jack for lifting the yoke; a climbing rod supporting the yoke, The device is characterized in that the climbing rod is supported at a support point located above the yoke. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to eliminate various problems caused by measures to prevent buckling of climbing rods. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a partially cross-sectional perspective view showing an example of a slip form construction device according to the present embodiment. FIG. [Figure 1A] 2 is a perspective view of a further part (a part related to one yoke) of FIG. 1. FIG. [Figure 2] FIG. 2 is a simplified cross-sectional view of the main parts of the slip form construction device according to this embodiment. [Figure 3] FIG. 10 is a simplified cross-sectional view of the main parts of a slip form construction device according to a comparative example. [Figure 4] FIG. 1 is a partially cross-sectional perspective view showing a slip form construction device according to a comparative example. [Figure 5] FIG. 10 is a partially sectional perspective view showing an example of a slip form construction device according to another embodiment. [Figure 6] FIG. 10 is a partially cross-sectional perspective view showing an example of a slip form construction apparatus according to yet another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Each embodiment will be described in detail below with reference to the accompanying drawings. Note that the dimensional ratios in the drawings are merely examples and are not limiting. Furthermore, shapes and the like in the drawings may be partially exaggerated for the sake of explanation. Furthermore, in the drawings, for ease of viewing, reference symbols may be assigned only to some of the parts that exist with the same attribute.

[0010] FIG. 1 is a partially cross-sectional perspective view showing an example of a slipform construction apparatus 1 according to this embodiment. FIG. 1 shows half of the slipform construction apparatus 1 cut away. FIG. 1 also shows a portion of a skeleton 10 formed by the slipform construction apparatus 1. FIG. 1 also shows a peripheral wall 12 surrounding the skeleton 10. Part or all of the peripheral wall 12 may be an underground structure such as an underground exterior wall, or may be an artificial structure. FIG. 1A is a perspective view of a further portion (a portion related to one yoke 30) of FIG. 1. FIG. 2 is a simplified cross-sectional view of a main portion of the slipform construction apparatus 1 according to this embodiment.

[0011] In the following description, a top view refers to a view along the direction of gravity, and a cross-sectional view refers to a view along a direction perpendicular to the cut plane shown in FIG.

[0012] In this embodiment, as an example, the body 10 has an annular shape when viewed from above, but the shape of the body 10 is arbitrary. In the following description, the radial direction refers to the radial direction based on the annular shape of the body 10, and the circumferential direction refers to the circumferential direction based on the annular shape of the body 10. Furthermore, the radially inner side refers to the side closer to the center (center of the circle) based on the annular shape of the body 10, and the radially outer side refers to the opposite side.

[0013] The slip form construction apparatus 1 is suitable for use in the slip form construction method. The slip form construction method is widely known in the art and will not be described in detail. The details of the slip form construction method to which the slip form construction apparatus 1 can be applied are arbitrary.

[0014] In this embodiment, the slip form construction apparatus 1 has an overall annular shape corresponding to the skeleton 10, which has an annular shape when viewed from above. However, as described above, the shape of the skeleton 10 is arbitrary, and accordingly, the shape of the slip form construction apparatus 1 (the overall shape when viewed from above) can also change depending on the shape of the skeleton 10. For example, if the shape of the skeleton 10 is square or star-shaped, the shape of the slip form construction apparatus 1 will also be square or star-shaped accordingly.

[0015] The slipform construction device 1 includes a climbing mechanism 20, a yoke 30, a formwork 40, a box truss 50, a lower column member 60, and floor members 71, 72, and 73.

[0016] A plurality of climbing mechanisms 20 may be provided in pairs with the yoke 30 to form one body 10 as shown in FIG.

[0017] The climbing mechanism 20 is a mechanism for raising the yoke 30 and includes a climbing rod 22 and a lifting jack 24 .

[0018] The climbing rod 22 extends in the vertical direction. The climbing rod 22 supports the yoke 30. The cross-sectional shape of the climbing rod 22 is optional.

[0019] In this embodiment, the climbing rod 22 is supported at a support point located above the yoke 30. Specifically, the climbing rod 22 is supported by a support member 150 located above the yoke 30. The support member 150 has the function of supporting (suspending) the yoke 30 and the like with respect to the earth (for example, the ground or an underground outer wall, etc.).

[0020] The lifting jack 24 is provided on the climbing rod 22. When the lifting jack 24 is operated, it generates a force that lifts the yoke 30.

[0021] The yoke 30 cooperates with the climbing mechanism 20 to raise the formwork 40 .

[0022] The yoke 30 includes a supported portion 31 and a pillar portion 33 .

[0023] The supported portion 31 engages with the climbing mechanism 20. The supported portion 31 is a structure extending horizontally (in the radial direction in this embodiment), through which the climbing rod 22 is inserted and to which the lifting jack 24 is attached. In order to ensure the necessary strength and rigidity, the supported portion 31 may have a lattice structure in cross section. In other words, it may have reinforcing members such as vertical, horizontal, and diagonal braces or trusses.

[0024] The column portions 33 extend downward from the supported portion 31 and support the formwork 40. The column portions 33 may be provided in pairs on both radial sides of the formwork 40. The column portions 33 may support the formwork 40 via a box truss 50, which will be described later.

[0025] The formwork 40 forms a molding space. In this embodiment, the formwork 40 includes a radially inner formwork member 41 and a radially outer formwork member 42. The formwork members 41 and 42 have a circular cylindrical shape when viewed from above. In this case, the formwork 40 forms a molding space between the formwork members 41 and 42 in the radial direction. The bottom surface of the molding space is formed by the top surface of the skeleton 10 in the process of being formed.

[0026] In this embodiment, concrete material is poured into the molding space formed by the formwork 40. Reinforcing bars 90 in the vertical direction and reinforcing bars 92 in the horizontal direction are arranged in the molding space.

[0027] After the material poured into the molded space hardens in the desired manner, the formwork 40 rises (slipping against the casted molded object) due to the operation of the climbing mechanism 20, forming a new molded space above it. In this way, material is poured into the molded space while the molded space is raised together with the formwork 40, thereby forming the skeleton 10 of the desired height. Hereinafter, the term "molded object" refers to the molded object formed by pouring material into the formwork 40, and in this embodiment, it refers to the skeleton concrete removed from the formwork 40. Furthermore, the term "next molded space" refers to the molded space that will be formed by the raised formwork 40 after the formwork 40 rises from the current point in time. The next molded space is open radially inward and outward, and is closed when the formwork 40 rises.

[0028] The box truss 50 has a box shape in a cross-sectional view. The box truss 50 may be continuously arranged in the circumferential direction so as to form a ring shape in a top view. The box truss 50 faces the formwork 40 in the radial direction via the column portions 33. Specifically, the box truss 50 includes a radially inner box truss 51 that faces the formwork member 41 from the radially inner side, and a radially outer box truss 52 that faces the formwork member 42 from the radially outer side.

[0029] The box truss 50 is fixed to the columns 33 and is supported by the climbing rods 22 via the columns 33. In this embodiment, the lower ends of the columns 33 are joined to the side surfaces of the box truss 50. The columns 33 may extend straight up and down to the lower end of the box truss 50 and be joined to the side surfaces of the box truss 50.

[0030] The lower column members 60 extend downward from the box truss 50 in a manner that they extend below the formwork 40. The lower column members 60 are fixed to the box truss 50. The lower column members 60 may be components that are integrated with the box truss 50, or may be part of the box truss 50. The lower column members 60 have an L-shaped cross section and have a horizontal portion 61 below. Similar to the box truss 50, the lower column members 60 may be provided in pairs on the radially inner and outer sides.

[0031] The floor members 71, 72, and 73 have a plate-like shape that provides a horizontal surface (floor surface). In this embodiment, the floor members 71, 72, and 73 extend in an annular shape. The floor members 71, 72, and 73 may be provided in pairs. That is, the floor members 71, 72, and 73 may be provided on the radially inner side and the radially outer side, respectively.

[0032] Floor members 71, 72, and 73 are provided at different heights. Specifically, floor member 71 is provided with the upper surfaces of the multiple yokes 30 (upper surfaces of the supported portions 31) as a seating surface. Floor member 72 is provided with the upper surface of the box truss 50, which has an annular shape in top view, as a seating surface. Floor member 73 is provided with the horizontal portions 61 of the multiple lower column members 60 as a seating surface.

[0033] The floor member 71 forms the lower surface of the work space (hereinafter, for the sake of distinction, also referred to as the "upper work space"). For example, the floor member 71 may form a foothold for workers.

[0034] The floor member 72 forms the underside of the work space related to the next mold forming space (hereinafter, for the sake of distinction, also referred to as the "pre-pouring work space"). Work related to the pre-pouring work space is work performed by humans and / or machines. The pre-pouring work space is optional, but may be a space for arranging objects or machines. For example, the pre-pouring work space may include a space for installing embedded fittings, a space for installing reinforcing bars 92, etc., as described below. The pre-pouring work space may also be a space where workers can walk.

[0035] The floor members 73 form the underside of a work space (hereinafter, for the sake of distinction, also referred to as a "post-pouring work space") for the upper part of the skeleton 10 being formed. The post-pouring work spaces are formed in pairs, radially inward and radially outward relative to the upper part of the skeleton 10 being formed. The upper part of the skeleton 10 being formed corresponds to the upper part of the molded product that has been cast by pouring, which has now been completed.

[0036] The work related to the post-pouring work space is work performed by humans and / or machines. The post-pouring work space may be a space for arranging objects or machines. For example, as described below, the post-pouring work space may include at least one of an attachment space for attaching the lining material to the molded object, an arrangement space for an unwinding device that unwinds the lining material, an arrangement space for a moving means that moves the unwinding device, an arrangement space for a welding device, and an arrangement space for a moving means that moves the welding device. The post-pouring work space may also be a space where workers can walk.

[0037] In a modified example, some of the components of the slip form construction device 1 may be omitted, or other components may be added. For example, the floor member 71 and the box truss 50 may be omitted. For example, if the box truss 50 is omitted, a connecting member extending horizontally (a member corresponding to the horizontal member at the top of the box truss 50) may be provided between the upper end of the lower column member 60 and the lower end of the column portion 33.

[0038] Next, the effects of this embodiment will be described in comparison with the comparative example shown in FIGS.

[0039] Fig. 3 is a simplified cross-sectional view of a main part of a slip form construction device 1' according to a comparative example. Fig. 4 is a partially cross-sectional perspective view showing a slip form construction device 1' according to a comparative example.

[0040] The slip form construction apparatus 1' according to the comparative example differs from the slip form construction apparatus 1 according to the present embodiment in that the climbing mechanism 20 is replaced with a climbing mechanism 20'.

[0041] The climbing mechanism 20' differs from the climbing mechanism 20 of this embodiment in that the upper end of the climbing rod 22' is not supported and is a free end.

[0042] In this comparative example, the climbing rod 22' supports the yoke 30 and other components via the lifting jack 24, and is subjected to a compressive load corresponding to the weight of the yoke 30 and box truss 50, as well as the frictional force (frictional force between the formwork 40 and the molded product) when the yoke 30 is lifted. For this reason, measures must be taken to prevent the climbing rod 22' from buckling. Such measures include, for example, the following various methods.

[0043] One of them is to reduce the buckling length by lowering the installation height of the lifting jack, but in this case, the range in the vertical direction in which the horizontal reinforcing bars 92 can be installed becomes narrower, which causes a problem of reduced workability.

[0044] Another solution is to increase the rigidity (cross-sectional area or second radius of area) of the climbing rod 22'. This approach can lead to problems such as reduced workability and increased costs. This is because leaving the hollow cross-section climbing rod buried can cause problems such as reduced strength due to cross-sectional loss in the structure 10 and reduced airtightness and watertightness. In such cases, additional measures are required, such as removing the climbing rod 22' after construction is completed and then filling the cavity with grout.

[0045] Another measure is to reduce the lifting speed of the yoke 30 and shorten the buckling length of the climbing rod 22' so that the concrete strength is fully developed. In this case, there is a problem that this leads to a decrease in the construction speed.

[0046] As described above, in the comparative example, the possibility of buckling of the climbing rod 22' becomes an issue, and various measures to reduce the possibility of buckling all have problems such as reduced workability.

[0047] In contrast, according to this embodiment, as described above, the climbing rod 22 is supported by the support member 150 above the yoke 30. In this case, the support member 150 can bear the downward load that the climbing rod 22' received in the comparative example. Therefore, in this embodiment, a tensile load acts on the climbing rod 22, and a compressive load does not act on it as in the comparative example. As a result, according to this embodiment, measures to prevent buckling of the climbing rod 22 are not required, and the various problems that occur in the comparative example described above can be eliminated.

[0048] Furthermore, in this embodiment, the support member 150 can bear the downward load that the climbing rod 22' received in the comparative example, so the climbing rod 22 does not need to be integrated with the structure 10. Therefore, the lower end of the climbing rod 22 may be cut off in accordance with the rise of the yoke 30. In other words, the lower end of the climbing rod 22 may be cut off in accordance with the rise of the yoke 30 so that the lower end is always positioned within the pre-pouring work space. This prevents a decrease in strength due to a loss of cross-sectional area of ​​the structure 10.

[0049] Here, in this embodiment, the lifting jack 24 is disposed so as to engage with the climbing rod 22 and rise along the climbing rod 22 integrally with the yoke 30, but this is not limited to this. That is, the lifting jack 24 may function to lift the climbing rod 22 itself. In this case, the yoke 30 is fixed to the lower end of the climbing rod 22 and can rise integrally with the lower end of the climbing rod 22. In this case, the lifting jack 24 may be disposed near the support member 150. For example, the lifting jack 24 may be supported by the support member 150.

[0050] Next, another embodiment will be described with reference to Figures 5 and 6. In the following, components that may be similar to those in the above-described embodiment will be given the same reference numerals and descriptions thereof may be omitted.

[0051] 5 and 6 are explanatory diagrams of other embodiments that may be implemented instead of the above-described embodiment, and similar to FIG. 1, are partially cross-sectional oblique views showing slip form construction apparatuses 1A and 1B according to other embodiments, respectively.

[0052] 5, the climbing rod 22A of the climbing mechanism 20A is provided at a position that does not overlap with the molding space in a top view. Specifically, the climbing rod 22A is provided so as to pass through the radially inner end of the supported portion 31 of the yoke 30. Accordingly, the support member 150A has a shape that protrudes relatively far radially inward.

[0053] According to this other embodiment, the climbing rod 22A is not included in the body 10 (i.e., it is not buried), and problems such as a decrease in strength due to a cross-sectional loss in the body 10 and a decrease in airtightness / watertightness can be eliminated.

[0054] In addition, in another embodiment shown in FIG. 5, there is no need to cut off the lower end of the climbing rod 22A in accordance with the elevation of the yoke 30, and the climbing rod 22A can be reused.

[0055] In the example shown in FIG. 5, the lifting jack 24 is provided on the yoke 30, but it may be provided on the support member 150A.

[0056] In another embodiment shown in Fig. 6, similar to the other embodiment shown in Fig. 5, the climbing rod 22B of the climbing mechanism 20B is provided at a position that does not overlap with the molding space in a top view. In this embodiment, unlike the embodiment shown in Fig. 5, the peripheral wall 12 is located radially outside the molding space, and the box truss 52 and the like are omitted. In other words, the inner peripheral wall of the peripheral wall 12 functions as the radially outer formwork member 42. In this case, a member that functions as a fixed formwork may be provided on the inner peripheral wall of the peripheral wall 12.

[0057] Although each embodiment has been described in detail above, it is not limited to the specific embodiment, and various modifications and changes are possible within the scope of the claims. It is also possible to combine all or a plurality of components of the above-described embodiments.

[0058] For example, in the above-described embodiment, the molded space is formed using the formwork 40, but a structural member that also functions as a formwork may be used instead of the formwork 40. Such a structural member is optional, and for example, the above-described lining material may be used. In this case, the skeleton 10 can be formed without using the formwork 40. That is, adjacent lining materials in the vertical direction can be fixed to each other in sequence by welding, bolting, or the like, and function as a formwork for the slip-form construction method. As a result, when forming the skeleton 10 equipped with the lining material, the formwork 40 is not required, enabling efficient construction. [Explanation of symbols]

[0059] 1. Slip form construction equipment 10 skeleton 20 Climbing mechanism 22 Climbing Rod 24 Lifting jack 30 York 31 Supported part 33 Pillar section 40 Formwork 50 Box Truss 60 Lower column material 71 Flooring 72 Flooring 73 Flooring 90 Vertical rebar 92 Horizontal reinforcing bars

Claims

1. An apparatus for slip form construction, a yoke for holding a form or a structural member that also functions as a form; a jack for lifting the yoke; a climbing rod supporting the yoke, 10. The device, wherein the climbing rod is supported at a support point located above the yoke.

2. The device of claim 1 , wherein the support point bears the weight of the yoke via the climbing rod.

3. The apparatus of claim 1 , wherein the jack is positioned above the yoke.

4. The device according to claim 1 , wherein the climbing rod is positioned at a position away from the formwork or the structural member when viewed in the vertical direction.

5. A method of forming a structure using a slip form process, comprising: providing a yoke, a jack and a climbing rod for holding the formwork or a structural member that also serves as the formwork; a supporting step of supporting the climbing rod above the yoke; a molding step, which is carried out after the supporting step, of putting a material into a space formed by the formwork or the structural member; and a step, performed in coordination with said forming step, of raising said yoke with said jack.

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