JP2001227159A - Slip from device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slip form device capable of constructing a cylindrical structure making variations in a sectional form in accordance with height by a simple process without being required for a form exchange. SOLUTION: Waling 24 is so constituted that a variable length member 30 is connected to a yoke connection member 32. The length of the variable length member 30 can be adjusted by a turn buckle 40, and an angle to the variable length member 30 and yoke connection member 32 can be adjusted by a turn buckle 44. A form 26 is held by the inside of the waling 24. The form 26 is constituted by connecting a steel form unit 50 with a bendable joint member 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slip foaming apparatus, and more particularly to a slip foaming apparatus suitable for constructing a tubular structure whose sectional shape changes with height.

[0002]

2. Description of the Related Art Conventionally, a slip foam method has been widely used as a technique for constructing a cylindrical structure such as a chimney. In the slip form method, concrete is poured between a pair of inner and outer forms supported by a yoke, and a hydraulic jack is raised by taking a reaction force on a rod or the like buried in the concrete, thereby raising the yoke. In this process, the mold is removed from the mold, and concrete is poured on top of the mold.

[0003]

By the way, some cylindrical structures such as chimneys change the cross-sectional shape according to the height so as to be circular at the base and polygonal at the top, for example. When such a tubular structure is constructed by the above-described slip-form method, the mold must be replaced in accordance with the change in the cross-sectional shape, which requires a great deal of labor.

[0004] The present invention has been made in view of the above points, and is intended to provide a tubular structure whose sectional shape changes according to the height.
It is an object of the present invention to provide a slip-form apparatus that can be constructed by a simple process that does not require a mold exchange.

[0005]

The above object is achieved by the present invention.
As described in the above, a slip foam apparatus comprising a belly supported by a yoke and a form supported by the belly, and constructing a tubular structure by casting concrete into the form. The belly is formed by connecting a plurality of unit members including a variable-length member to each other in an annular manner so as to be rotatable with each other, and is provided with an adjustment mechanism for adjusting a length of the variable-length member and an angle between the unit members. Achieved by a slipform device. According to the first aspect of the present invention, since the length of at least a part of the unit members constituting the belly can be adjusted and the angle between the unit members can be adjusted, the shape of the belly can be changed with a high degree of freedom. Can be done. The shape of the mold also changes in accordance with the change in the shape of the abdomen. Therefore, according to the present invention, by casting concrete while changing the shape of the belly, it is possible to construct a tubular structure in which the cross-sectional shape changes depending on the height without replacing the formwork.

Further, as described in claim 2, claim 1
In the slip form device described above, the belly upright may be rotatably supported by the yoke.

Further, as described in claim 3, claim 1
Alternatively, in the slip-form device according to item 2, the belly may be supported by the yoke so as to be movable in a radial direction of the tubular structure.

According to the second and third aspects of the present invention, the bulging is supported by the yoke so as to be rotatable or movable in the radial direction of the tubular structure, so that the bulging is caused by the support to the yoke. Is reduced.

Further, as described in claim 4, claim 1
4. The slip form device according to claim 3, wherein the form is configured by connecting a plurality of form units with a bendable connection member. 5. According to the fourth aspect of the present invention, since the mold is configured by connecting the mold units with the bendable connection members, it is possible to prevent the unevenness of the wall surface of the building between the mold units.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view illustrating a schematic configuration of a slip foam device 10 according to the present embodiment.
As shown in FIG. 1, in the present embodiment, a cylindrical structure such as a chimney is constructed by sequentially placing concrete 12 upward by a slip-form device 10.

[0011] As shown in FIG.
0 has a yoke 14. A rod 16 extending upward is erected in the cast concrete 12, and the yoke 14 is supported by the rod 16 via a jack 18. The workbench 2 is located above the yoke 14.
0 is provided. On the work table 20, various devices required for concrete casting, such as a crane (not shown) for lifting concrete with a bucket, are installed. Further, the yoke 14 supports belly protuberances 22 and 24 provided as a pair on the inner peripheral side and the outer peripheral side.
Form frames 26 and 28 are held by the belly protuberances 22 and 24, respectively, so as to face each other in the radial direction.

FIG. 2 is a plan view showing the arrangement of the yoke 14 and the outer belly 22. As shown in FIG.
The plurality of yokes 14 are radially arranged so as to extend in the radial direction of the tubular structure under construction. In addition, stomach upset 22
Is constructed by alternately connecting the extendable variable length member 30 and the fixed length yoke engaging member 32 in an annular manner. The yoke connecting member 32 is supported by the yoke 14 via pins 34 so as to be rotatable and movable in the radial direction.

FIG. 3 is an enlarged view of the prow 22. FIG. 3 also shows the formwork 26 supported by the belly upset 22. As shown in FIG. 3, the variable length member 30
The small-diameter steel pipe 38 is inserted into the large-diameter steel pipe 36 so as to be able to advance and retreat, and the turnbuckle 40 is used to connect between the flange sections 36a and 38a provided on the outer periphery of the large-diameter steel pipe 36 and the small-diameter steel pipe 38, respectively. Have been. Therefore, by adjusting the length of the turnbuckle 40, the variable length member 30 can be expanded and contracted.

Variable length member 30 and yoke connecting member 32
Are rotatably connected by a connecting pin 42.
Further, flange portions 30a and 32a are provided on the outer peripheral surfaces of the ends of the variable length member 30 and the yoke connecting member 32, respectively. The flange portions 30a and 32a respectively
Each end of the turnbuckle 44 is rotatably connected via pins 46 and 48. Therefore, by adjusting the length of the turnbuckle 44, the angle between the variable length member 30 and the yoke engaging member 32 can be changed.

A formwork 26 is held inside the belly upset 22. The formwork 26 includes a plurality of steel formwork units 50.
Are connected annularly via a bendable connection member 52 such as a hinge. According to the above-described configuration of the upset 22 and the formwork 26, the turnbuckle 4
By adjusting the length of 0 and 44, the abdomen 22
And the shape of the formwork 26 can be changed.

FIG. 4 shows a state in which the shape of the belly upright 22 is changed to, for example, a quadrangle (octagonal when the yoke engaging members 32 at the corners are counted on one side). Also, FIG.
FIG. 5 is an enlarged view showing the belly upset 22 in the state shown in FIG. In the state shown in FIGS. 4 and 5, each variable length member 30 is contracted from the state shown in FIG. 3, and between the yoke engaging member 32 at the center of each side of the square and the variable top member 30 on both sides thereof. The angle is 180 °.

As described above, in this embodiment, the shape of the mold 26 can be changed with a high degree of freedom by adjusting the length of the variable length member 30 and the angle between the variable length member 30 and the yoke engaging member 32. Can be done. At this time, since the yoke connecting member 32 is supported by the yoke 14 so as to be rotatable and movable in the radial direction, the restriction on the shape change of the belly upset 22 due to the support on the yoke 14 is eased. In addition, in order to simplify the configuration of the support portion of the yoke connecting member 32 to the yoke 14,
Depending on the aspect of the shape change required for the yoke, the yoke engaging member 32 may be supported only rotatably or only movably in the radial direction.

In FIGS. 2 to 5, the outer belly 2
2 and formwork 26 are only shown, but the inside
The mold 28 has the same configuration, and the shape of the mold 28 can be changed with a high degree of freedom in the same manner as described above.

Next, the slip forming device 10
A construction procedure for constructing a tubular structure will be described. Note that the cylindrical structure to be constructed has a cross-sectional shape that changes according to the height, for example, a circular shape at the base and a square shape at the top.

First, when constructing the base of the tubular structure, as shown in FIG. 2 and FIG.
24 and the molds 26 and 28 are circular,
Concrete 12 is cast between 6, 28. At this time, the rod 16 is built in the concrete 12 so as to extend upward. Next, the yoke 14 is lifted by the jack 18 by applying a reaction force to the rod 16, thereby removing the molds 26 and 28 from the concrete 12. Then, by repeating the operation of placing concrete between the molds 26 and 28 again, the tubular structure is constructed upward.

When the cross-sectional shape of the tubular structure is raised from a circular shape to a rectangular shape to a height at which the cross-sectional shape is to be changed, the length of the variable-length member 30 and the length of the variable-length member 30 and the yoke connecting member are changed according to the change in the cross-sectional shape. The shape of the molds 26 and 28 is changed by adjusting the angle between them. Then, concrete is poured between the molds 26 and 28 while changing the shape of the molds 26 and 28 from a circle to a square. In this way, it is possible to construct a tubular structure whose sectional shape continuously changes from a circle to a square.

As described above, according to the present embodiment, since the shapes of the molds 26 and 28 can be changed with a high degree of freedom, a cylindrical structure whose sectional shape changes according to the height can be obtained. In addition, the construction can be performed by a simple process without requiring any trouble such as replacement of a mold.

The molds 26 and 28 are composed of a plurality of mold units 50. By connecting them with the connecting members 52, the connecting portions can be made smooth. For this reason, in this embodiment, it is possible to construct a tubular structure that is excellent in aesthetic appearance with no step on the wall surface.

It should be noted that the numbers of the variable length members 30 and the yoke engaging members 32 constituting the belly upsets 22, 24 are shown in FIG.
The number is not limited to the above, and an appropriate number can be used according to the shape of the tubular structure to be constructed.

[0025]

As described above, according to the first aspect of the present invention, the shape of the belly can be changed with a high degree of freedom. For this reason, by pouring concrete while changing the shape of the belly, it is possible to construct a tubular structure whose cross-sectional shape changes according to the height in a simple process that does not require labor such as mold replacement.

According to the second and third aspects of the present invention, the restriction on the change in the shape of the belly can be eased, so that a cylindrical structure having a more diverse cross-sectional shape can be constructed.

According to the fourth aspect of the present invention, it is possible to prevent irregularities on the wall surface of the structure between the form units, so that it is possible to construct a cylindrical structure having smooth wall surfaces and excellent appearance.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a schematic configuration of a slip foam device according to an embodiment of the present invention.

FIG. 2 is a plan view showing an arrangement of a yoke provided on the slip foam device of the present embodiment and an outer belly.

FIG. 3 is an enlarged view showing the prow of FIG. 2 together with a mold;

FIG. 4 is a diagram showing a state in which the shape of the upset is changed to a square.

FIG. 5 is an enlarged view showing the abdomen shown in FIG. 4 together with a mold.

[Explanation of symbols]

 14 Yoke 22, 24 Belly upset 26, 28 Formwork 30 Variable length member 32 Yoke connecting member 50 Steel formwork unit 52 Connection member

Claims (4)

[Claims] 1. an abdomen supported by a yoke;
A form supported by the upset, and a slip-form apparatus for constructing a tubular structure by placing concrete in the form, wherein the upset includes a plurality of variable length members. A slip foam device comprising: a unit for rotatably connecting unit members to each other; and an adjusting mechanism for adjusting a length of the variable length member and an angle between the unit members. 2. The slip foam device according to claim 1, wherein the belly is rotatably supported by the yoke. 3. The slip-form device according to claim 1, wherein the belly is supported by the yoke so as to be movable in a radial direction of the tubular structure. 4. The slip-form apparatus according to claim 1, wherein the form is formed by connecting a plurality of form units with a flexible connecting member.