JPH08105240A - Mold frame of tower concrete structure and its construction method - Google Patents

Abstract

PURPOSE: To eliminate a finishing work after execution work and resetting of a mold so as to shorten a work period by setting a prefabricated material at the corners of a tower concrete structure and using it as a mold guide when the mold is raised slidably. CONSTITUTION: A mold frame 1 is formed by installing multiple holding materials 2 extendably and horizontally on the rear surface of a mold 11 and fixing it with a frame material 13 in longitudinal direction. Also a pressing material 31 is made in contact with the center part of the mold 11, a mold releasing jack 3 is installed at the middle of the pressing material 31, and an elevating jack 2 is installed on a loading stand fixed to the mold 11 through multiple supporting rods 21 located over deposited concrete and the frame material 13. After concrete is deposited in the molds 11 and 11, connect reinforcements and the rods 21 to the molds to extend them upward, and bury prefabricated material 14 into the corner parts of a tower concrete structure or arrange it removably. Then the mold 11 is pulled outward by the mold releasing jack 3 for releasing the mold, and the mold 11 is fixed to a specified position using the prefabricated material 14 as a guide and rotating to raise slidably rollers 15 at both ends of the holding material 12.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to the construction of a tower-like concrete structure.

[0002]

2. Description of the Related Art When constructing tower-shaped concrete structures such as silos, chimneys and bridge piers, that is, tower-shaped concrete structures, it is necessary to lift the formwork vertically upward. Therefore, conventionally, a sliding form method in which concrete is continuously placed while sliding the form up, or a jumping form in which the form is lifted to the next block and set after the concrete is cured and then demolded There is a construction method.

[0003]

However, the conventional method has the following problems. <a> In the sliding foam method, finishing work is required because the concrete surface is scraped when sliding the formwork. <B> In the jumping foam construction method, 1 block 4 ~
Since the formwork is assembled and disassembled in units of 5 m, and further concrete curing and joint treatment are required, the construction speed becomes slow.

[0004]

It is an object of the present invention to improve the construction speed, quality and accuracy when constructing a tower concrete structure.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to a prefabricated material arranged at a corner portion of a tower-like concrete structure in a formwork frame of a tower-like concrete structure, and a mold for ascending using the prefabricated material as a guide. A frame and a support rod arranged at a planned construction position of the tower-like concrete structure,
The supporting rod and a rising jack attached to the form, and driving the rising jack with the supporting rod as a reaction force,
A mold frame for a tower-like concrete structure, characterized in that the mold is raised using the pre-fab material as a guide, or
In the construction method of the tower-like concrete structure, prefabricated material is placed in the corner part of the tower-like concrete structure,
A tower-like structure characterized by arranging a formwork capable of ascending using the prefabricated material as a guide, and raising the formwork by using a support rod arranged at a position where a tower-shaped concrete structure is to be constructed as a reaction force. It is in the construction method of concrete structures.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. <a> Formwork frame of tower-like concrete structure (FIGS. 1, 3, and 4) In the formwork frame 1, the formwork 11 is fixed laterally with a plurality of holding materials 12, and the holding material 12 is lengthwise. It is fixed to the frame member 13 with. Then, when the formwork is raised and slid, the tower-shaped concrete structure 4
The pre-fabric material 14 is arranged at the corner portion of and the pre-fab material 14 is raised as a form guide. Each formwork 11
The holding material 12 is connected and combined. In the frame material 13,
A mounting table 22 on which the lifting jack 2 is mounted is attached.
Support rod 2 extending upward from the cast concrete
Using 1 as a reaction force, the mounting table 22 is raised by using the raising jack 2 and the form 11 is slid upward.

<B> Pre-fab material (FIGS. 1 and 2) The pre-fab material 14 may be an embedded formwork, a steel frame, or the like.
It is installed at the corner of the tower-shaped concrete structure 4.
After the concrete is poured, the movable formwork is slid using the pre-fab material 14 as a guide. The prefabricated material 14 may be embedded in the tower-like concrete structure body or used as a temporary formwork or rail mount.

<C> Holding Material (FIGS. 1, 2, and 3) The holding material 12 is configured to be expandable and contractible, and is horizontally attached to the back surface of the mold 11. The holding material 12 of each mold 11 is used as a framework to connect the molds 11. Since the holding material 12 is expandable and contractible, the tower-shaped concrete structure 4 can be adapted even if the cross-section has a variable cross-sectional shape. The rollers 15 are attached near both ends of the holding material 12, and the rollers 15 are prefabricated materials 14
So that the preform material 14 is abutted against the prefabricated material 14
Make it easier to slide up.

<D> Demolding jack (FIGS. 3 and 4) A pressing member 31 is pressed against the center of the mold 11. Stamping material 31
Has a demolding jack 3 attached midway and is configured to be expandable and contractible. The pressing member 31 on the outside of the tower-shaped concrete structure 4 is attached to the holding member 12 near the pre-fab member 14 via the support member 32. When the demolding jack 3 is operated and the pressing member 31 is contracted, the formwork 11 is pulled to the outside and is demolded from the concrete surface. Both ends of the pressing member 31 on the inside of the tower-shaped concrete structure 4 are attached to the supporting members 32, and press the mold 11. When the demolding jack 3 is operated and the pressing member 31 is contracted, the molds 11 at both ends can be demolded.

<E> Support Rods (FIGS. 1 and 4) A plurality of support rods 21 are arranged above the cast concrete, and the support rods 21 are used as a reaction force to slide the mold 11 upward by the raising jack 2. The support rod 21 is made of round steel, a steel pipe, or the like, and when the rising jack 2 approaches the upper end, the support rod 21 is replenished sequentially. Climbing jack 2
For example, two center hole jacks are used,
The mounting rod 22 is attached to the support rod 21 and the mounting table 22, and the mounting table 22 can be moved above the supporting rod 21 by a normal alternate operation of the jacks. Since the mounting table 22 is fixed to the mold 11 via the frame member 13 and the like, the mold 11 can be raised.

The construction order of the tower-like concrete structure 4 will be described below with reference to FIG. FIG. 4 is schematically illustrated for easy understanding.

<A> Reinforcing bar assembly (FIG. 4 (A)) After placing concrete in the formwork, the reinforcing bars 41 and the support rods 21 are added upward.

<B> Installation of prefabricated material (FIG. 4 (B)) The prefabricated material 14 is placed at the corner of the tower-like concrete structure 4 to be constructed. The pre-fab material 14 may be embedded in the tower-like concrete structure 4 or may be removable.

<C> Sliding up of formwork (FIG. 4 (C)) The formwork 11 is pulled outward by the demolding jack 3 to remove it from the concrete surface. Form 1 by climbing jack 2
1 is slid upward using the prefabricated material 14 as a guide. Since the roller 15 rotates on the prefabricated material 14, the formwork 1
1 can be easily raised. Moreover, since the formwork 11 is not in contact with the concrete surface, the concrete surface is not roughened. Once raised to the prescribed position, the formwork 11
Is fixed.

<D> Placing Concrete (FIG. 4 (D)) Concrete is poured into the mold to construct the tower-like concrete structure 4.

[0016]

According to the present invention, the following effects can be obtained. <A> Since the surface of the prefabricated material is the sliding surface of the formwork, even younger concrete will not be adversely affected by the rise of the formwork. Therefore, finishing work after construction is unnecessary. <B> Since the prefabricated material serves as a fixed point of the formwork, it is not necessary to reset the formwork and the construction speed can be increased. <C> Since the framework of the formwork is expandable, it can be applied to a tower-like concrete structure having a variable cross-sectional shape.

[Brief description of drawings]

[Fig. 1] Layout plan of the formwork frame of tower-like concrete structure

[Fig. 2] Roller installation drawing

FIG. 3 is a layout view of a demolding jack.

[Fig. 4] Illustration of construction method of tower concrete structure

Claims (6)

[Claims] 1. A formwork frame for a tower-like concrete structure, a prefabricated material arranged at a corner portion of the tower-like concrete structure, a formwork that rises using the prefabricated material as a guide, and a tower-like concrete structure. A support rod arranged at a planned construction position, a support jack attached to the support rod and the mold, and the support rod driving the lift jack with a reaction force to guide the prefab material to the mold. A formwork framework for tower-like concrete structures, characterized in that it raises. 2. A formwork frame for a tower-like concrete structure, a prefabricated material arranged at a corner portion of the tower-like concrete structure, a formwork that rises using the prefabricated material as a guide, and the formwork from outside. An expandable support member for pressing, a support rod arranged at a planned construction position of a tower-shaped concrete structure, and a lifting jack attached to the support rod and the formwork are provided. A formwork framework for a tower-like concrete structure, characterized in that the prefab material is used as a guide to raise the formwork by driving a jack. 3. A formwork frame for a tower-like concrete structure, a prefabricated material arranged at a corner portion of the tower-like concrete structure, a formwork that rises using the prefabricated material as a guide, and a demolding method for the formwork. The demolding jack to be performed, the support rod arranged at the planned construction position of the tower-like concrete structure, and the lifting jack to be attached to the support rod and the mold are provided. A tower-like concrete structure, characterized in that the mold is demolded using a mold jack, the supporting rod is driven by the reaction force to drive the lifting jack, and the prefab material is used as a guide to lift the mold. Formwork frame of the object. 4. A method for constructing a tower-shaped concrete structure, wherein a prefabricated material is arranged at a corner portion of the tower-shaped concrete structure, and a formwork is arranged so that the prefabricated material can be used as a guide to raise the tower-shaped concrete structure. A method for constructing a tower-like concrete structure, characterized in that the support rod arranged at the position planned to be constructed is raised to raise the formwork with a reaction force. 5. A method for constructing a tower-like concrete structure, wherein a prefabricated material is arranged at a corner portion of the tower-shaped concrete structure, a mold is arranged so that the prefabricated material can be used as a guide, and the mold is outside. Construction of a tower-shaped concrete structure, characterized in that it is pressed by a stretchable support material from above to raise the formwork by using a support rod arranged at a position where the tower-shaped concrete structure is to be built as a reaction force. Construction method. 6. A method for constructing a concrete tower structure, wherein a prefab material is arranged at a corner portion of the concrete tower structure, a mold is arranged so that the prefab material can be used as a guide, and a concrete structure is arranged on the mold. After casting, the formwork is demolded, and the formwork is raised by using the support rods arranged at the positions where the towerlike concrete structure is to be constructed as a reaction force to raise the formwork. Construction method.