JPH0835210A - Tower-like structure and construction method thereof - Google Patents

Abstract

PURPOSE:To construct a tower-like structure extremely easily in a short period. CONSTITUTION:Precast blocks 5 are assembled on the upper part of a lower part 3 of a pier where a steel material in the longitudinal direction is installed to a hollow part of the precast blocks 5 while concrete is placed as well, thereby constructing a precast member 4. A plurality of block members, whose front and rear surfaces are formed with precast boards to which shearing-reinforced steel material is installed, are jointed and assembled in rectangular shape, thereby constructing the precast block member 5. The shearing reinforced steel materials for the block members are lapped one upon anther at a jointed spot by jointing the block members with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tower-like structure such as a bridge pier and a construction method thereof.

[0002]

2. Description of the Related Art Generally, for example, in the case of constructing a tower structure such as a pier, first, a pier foundation is constructed, and an axial steel material and a shear reinforcing steel material are arranged on the pier foundation. A mold was arranged so as to surround the axial steel material and the shear-reinforced steel material, and concrete was placed in the areas partitioned by the mold.

[0003]

By the way, in the above-mentioned conventional construction method, complicated form work for placing concrete (transportation, installation, demolding, movement, cleaning of formwork,
Various works such as dismantling and disposal), shear reinforced steel material arranging work, and wide scaffolding and supporting members were required at the time of rebar assembling work and formwork work. As described above, in the conventional construction method, a great deal of labor is required, and the construction period is unavoidably prolonged, and such a problem is remarkable in the high pier.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a tower-like structure which can be constructed extremely easily and in a short period of time, and a construction method thereof.

[0005]

In order to achieve the above object, the tower-like structure according to claim 1 has a structure in which a plurality of precast blocks having a hollow portion are laminated, and a shaft is provided in the hollow portion of the precast block. Direction steel material is disposed and concrete is cast, the front and back sides of the precast plate are precast plates, and the end portions of a plurality of block bodies provided with shear reinforcing steel material are joined to each other. It is characterized in that the hollow parts are formed between the precast plates constituting these block bodies. The tower-like structure according to claim 2 is the tower-like structure according to claim 1, wherein the precast block is the shear-reinforced steel material disposed in each block body at a joint portion of the block bodies. It is characterized by being wrapped.

The method for constructing a tower structure according to claim 3 is
The front and back are precast plates, shear reinforcing steel material is provided on these precast plates, and the precast block is assembled by joining the end portions of a plurality of block bodies having a hollow portion between the precast plates. Are assembled, an axial steel material is arranged in a hollow portion formed between the precast plates, and concrete is poured.

[0007]

According to the tower structure of claim 1,
Since the precast block itself is used as the structure of the tower-shaped structure, the formwork at the time of construction is unnecessary. Also,
Since the shear-reinforced steel material is arranged in the precast block, the work of arranging it during construction is unnecessary. Also,
Since the outer surface of the structure is covered with the precast plate, deterioration of the concrete due to outside air can be prevented. According to the tower-shaped structure of claim 2, since the shear-reinforced steel materials of the block bodies forming the precast block are wrapped at the joint portions of the block bodies, the block bodies are reliably joined. Be done.

According to the method for constructing a tower-like structure according to claim 3, the precast block is assembled by assembling the precast block by joining the end portions of the block body together and is assembled upward, and the precast plate constituting the block body of the precast block is assembled. By arranging the axial steel material and placing concrete in the hollow part formed between the two,
A tower-like structure whose outer surface is covered with a precast plate is constructed.

[0009]

EXAMPLES Examples of the tower-like structure and its construction method of the present invention will be described below with reference to the drawings. In this example,
A pier will be described as an example of the tower-like structure. In FIG. 1, reference numeral 1 is a pier (tower-shaped structure) under construction. This pier 1 is composed of a pier lower part 3 built on the upper part of the pier foundation part 2 by cast-in-place, and a precast part 4 built on the upper part of the pier lower part 3. In addition,
This pier lower part 3 can be omitted.

The precast portion 4 is an assembly of a plurality of precast blocks 5, and these precast blocks 5 have a planar shape having holes as shown in FIG. As shown in FIG. 3, the precast block 5 includes a plurality of block bodies 6, that is, side block bodies 6 a and 6 that form the outer periphery of the precast block 5.
b and an intermediate block body 6c assembled between the side block bodies 6a are assembled, and each block body 6 includes a precast plate 7 on its front and back sides,
The precast plate 7 has a structure in which a shear reinforcing steel material 8 is arranged. That is, the end portions of the side block bodies 6a and 6b are abutted against each other, and the end portion of the intermediate block body 6c is abutted against the middle portion of one side block body 6a. The precast block 5 consisting of is assembled.

By assembling the block bodies 6 into the precast blocks 5 in this way, the shear reinforcing steel materials 8 arranged in the respective block bodies 6 are arranged to wrap each other. Precast block 5
Is provided with a plurality of joining bolts 9, and these joining bolts 9 are fastened to joining nuts (not shown) of the lower precast block 5 to join the precast blocks 5 to each other vertically. . Further, in the hollow portion 11 in which the shear reinforcing steel material 8 of the block body 6 constituting the precast block 5 in the precast portion 4 is disposed, the axial steel material 12 (see FIG. 5) is disposed, and further,
Concrete is placed. That is, the precast block 5 is integrated with the axial steel material 12 and concrete to form the precast portion 4. Reference numeral 14 in FIG. 1 is a scaffold for work.

Next, a construction method for constructing the pier 1 having the above structure will be described with reference to FIGS. 4 and 5 and along the flowchart of FIG. (1) First, after constructing the pier foundation, the pier lower part 3 having a height of about one step of the precast block 5 is constructed by cast-in-place concrete (step S1). (2) Next, the block body 6 is lifted up and assembled into the precast block 5 at the upper part of the pier lower part 3, and the precast block 5 is provided on the upper part of the pier lower part 3 by a predetermined number of stages (about 5
Steps) are stacked, and the precast blocks 5 are joined together by the joining bolts 9 (see FIG. 4) (step S2).

(3) In this state, the axial steel material 1 is made by a crane or the like into the hollow portion 11 between the precast plates 7 of the block body 6 constituting the precast block 5.
2 is provided (see FIG. 5) (step S3). (4) Then, concrete is poured into the hollow portion 11 of the block body 6 (step S4). (5) After the concrete is hardened, the operations (3) to (5) are repeated a predetermined number of times to construct the pier 1 with a predetermined height (step S5).

As described above, according to the tower-like structure and its construction method of the present embodiment, formwork, that is, transportation, installation, movement, demolding, cleaning, disassembly, disposal of the form, etc. And, it is possible to eliminate extremely complicated various works such as the work of arranging the shear reinforcing steel material, and the number of field workers can be reduced. Further, unlike the conventional case, since it is not necessary to demold and repurpose the mold, the concrete curing time for demolding is not required, and therefore the construction period can be shortened. Furthermore, it is possible to eliminate the need for a huge amount of scaffolding and the supporting work for supporting the formwork, and it is possible to save the labor required to install these scaffolding and supporting work. Further, since the outer surface of the pier can be configured by the precast block, the pier can be made excellent in durability against the outside air.

In the above embodiments, the piers have been described as an example of the tower-like structure, but the tower-like structure of this embodiment and the tower-like structure that can be constructed by the construction method thereof are not limited to piers. There is no such thing.

[0016]

As described above, according to the tower structure and its construction method of the present invention, the following effects can be obtained. According to the tower-shaped structure of the first aspect, since the precast block itself is used as the structure of the tower-shaped structure, the formwork at the time of construction can be eliminated. This eliminates the need for complicated formwork that was required in the past, that is, various types of work such as transporting, installing, moving, demolding, cleaning, dismantling, and disposing of the formwork, reducing the number of site workers. can do. Further, unlike the conventional case, it is not necessary to demold and repurpose the mold, so that a concrete curing period for this demolding is not required, and therefore the construction period can be shortened. Further, since the shear-reinforced steel material is embedded in the precast block, the work of disposing the shear-reinforced steel material at the time of construction can be eliminated. Furthermore, it is possible to eliminate the need for a huge amount of scaffolding and the supporting work for supporting the formwork, and it is possible to save the labor required to install these scaffolding and supporting work. Moreover, since the outer surface of the structure is covered with the precast block, it is possible to obtain a tower structure having excellent durability against the outside air. According to the tower-like structure of claim 2, since the shear-reinforced steel materials of the block bodies forming the precast block are wrapped at the joint portions of the block bodies, the block bodies are securely joined. be able to.

According to the third aspect of the tower-shaped structure, the block bodies are assembled in a rectangular shape to form a precast block, and the precast blocks are assembled upward, and the precast blocks are formed between the precast plates constituting the block body. By arranging the steel material in the axial direction and placing concrete in the hollow portion, it is possible to construct a tower-like structure extremely easily.

[Brief description of drawings]

FIG. 1 is a side view of a pier explaining an embodiment of a tower structure and a construction method thereof according to the present invention.

FIG. 2 is a plan view of a precast block illustrating an example of a tower-like structure and a construction method thereof according to the present invention.

FIG. 3 is a plan view of a disassembled precast block for explaining an example of the tower-shaped structure and its construction method of the present invention.

FIG. 4 is a side view of a tower-like structure for explaining an example of a method for constructing a tower-like structure according to the present invention.

FIG. 5 is a side view of a tower-like structure for explaining an example of a method for constructing a tower-like structure according to the present invention.

FIG. 6 is a flow chart for explaining a bridge pier construction work process by the tower structure construction method according to the embodiment of the present invention.

[Explanation of symbols]

 1 Bridge pier (tower structure) 5 Precast block 6 Block body 7 Precast plate 8 Shear reinforced steel material 11 Hollow part 12 Axial steel material

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Claims (3)

[Claims] 1. A plurality of precast blocks having a hollow portion are laminated, and an axial steel material is placed and concrete is cast in the hollow portion of the precast block. The precast block has front and back surfaces precast. These precast plates are assembled by joining the ends of a plurality of block bodies provided with shear-reinforced steel to these precast plates, and the hollow parts are formed between the precast plates forming these block bodies. A tower-like structure characterized by being formed. 2. The tower structure according to claim 1, wherein the precast block is formed by wrapping the shear reinforcing steel material provided in each block body at a joint portion of the block bodies. Stuff. 3. Assembling by joining end portions of a plurality of block bodies having front and back sides made of precast plates, provided with shear-reinforced steel material on these precast plates, and forming hollow portions between the precast plates. A method for constructing a tower-like structure, comprising assembling a precast block thus obtained, arranging an axial steel material in a hollow portion formed between the precast plates, and placing concrete.