JP2001032522A - Construction of tower body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a tower body having a special shape while sufficiently curing concrete. SOLUTION: A steel pipe 1 is erected within a scheduled range of a tower body to be constructed, and a guide rail 3 is installed outside the scheduled range. A working scaffold 4 is moved up along the guide rail 3. Two sets of upper and lower forms 5 are suspended from the working scaffold 4. Concrete 6 is placed into a first form set up so as to surround a group of steel pipes and a second form set up under the first form is demolished and lifted up to the upper position of the first form. The second form is set up in a state that it surrounds the steel pipes on the first form. Then concrete 6 is placed into the second form. Thereafter, the working scaffold 4 is moved up along the guide rail 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for constructing a tower.

[0002]

2. Description of the Related Art In order to construct a tower like a pier,
A slip form method has been developed in which concrete is poured while moving the formwork.

[0003]

The slip-form method described above has a problem that it is not possible to take sufficient time for hardening the concrete because the mold is constantly moving.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and a tower-like body having a special shape can be constructed while sufficiently curing concrete. It is intended to provide a method for building a body.

[0005]

In order to achieve the above-mentioned object, a method for constructing a tower according to the present invention comprises the steps of: setting a steel pipe within an area where the tower is to be constructed; Raise the rail, raise the work scaffold along this guide rail, suspend two sets of upper and lower formwork from the work scaffold, and put concrete inside the first formwork assembled to surround the steel pipe group. The second mold assembled under the first mold is disassembled and lifted to a position above the first mold, and the second mold is surrounded on the first mold in a state surrounding the steel pipe group. The method is characterized by a method of constructing a tower-like body, in which a frame is assembled, concrete is poured into the inside of the second form, and then the work scaffold is raised along a guide rail.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

<A> Installation of steel pipe. First, the steel pipe 1 is erected and set up within the construction area of the tower. The steel pipe 1 is a hollow cylindrical body having a certain length, and is lifted by a crane, sequentially welded, and extended in a vertical direction. When the steel pipe 1 is extended to a predetermined height, the ceiling frame 2 is attached to the upper end thereof. The ceiling frame 2 is installed so as to extend to the outside of the construction area of the tower.

<B> Installation of guide rails. Next, the guide rail 3 is installed vertically outside the range in which the tower is to be constructed. For this purpose, the upper end of the guide rail 3 is attached to the ceiling frame 2, and the lower end of the guide rail 3 is installed on the ground. In the case of a tower having the same shape in the upper and lower cross sections, the guide rail 3 is vertical, and in the case of a tower having another shape, the guide rail 3 may be inclined.

<C> Working scaffold 4 Work scaffold 4 ascending and descending along this guide rail 3
Attach. The scaffold 4 is a multi-stage type framework having a plurality of stages of passages and connecting them vertically. The worker performs various operations by moving horizontally in the passage of the work scaffold 4 or moving up and down the upper and lower steps. The work scaffold 4 has a closed shape that surrounds the entire perimeter of the planned area of the tower, and resists the horizontal pressure of the concrete applied to the formwork 5. Wheels are interposed between the work scaffold 4 so that the work scaffold 4 can smoothly rise along the guide rail 3.

<D> The work scaffold 4 is raised. In order to raise the work scaffold 4 along the guide rail 3, a through hole 31 is opened in the guide rail 3 in the horizontal direction. On the other hand, a vertical jack 32 is installed on the work platform 4. One end (the upper end in the embodiment of FIG. 3) of the jack 32 is attached to the work scaffold 4, and the other end (the lower end in the embodiment of FIG. 3) of the jack 32 is formed in the through hole 3 of the guide rail 3.
1 is fixed via a pin. If the jack 32 having such an arrangement is extended or shortened, the work scaffold 4 can be raised by taking the reaction force to the inserted pin and expanding and contracting the vertical jack 32.

<E> Hanging of the form support frame 51. The support frame 51 of the formwork 5 is suspended from above the work platform 4.
The form frame 5 is attached to the support frame 51 and can be removed. The form 5 attached to the support frame 51 can be diverted by being lifted up from below by lifting the support frame 51.

<F> Arrangement of the formwork 5 The formwork 5 has a shape that surrounds the entire outer periphery thereof in order to cast the tower-shaped concrete 6. A plurality of sets of the mold 5 are prepared. The uppermost form 5 is assembled just before the concrete 6 is cast as the casting form 5 and the concrete 6 is cast therein. In order to resist the lateral pressure of the concrete 6, a plurality of form support jacks 52 are arranged between the work platform 4 and the form 5 on the outer periphery thereof. The formwork 5 below the concrete form 6 is left attached to the outside of the concrete 6 for several days after the concrete 6 is cast, and the concrete form 6 is cured as the curing formwork 5.

<G> Diversion of the formwork 5. The curing form 5 at the lowermost position is disassembled after a certain period and attached to the form supporting frame 51. Then, the support frame 51 is lifted to be diverted to the uppermost portion. When the lowermost form 5 is lifted, the connection between the upper form support jack 52 and the form 5 is disassembled to secure a lifting space. After being lifted up to the uppermost part, the form 5 is removed from the support frame 51, assembled as a casting form 5 and concrete 6 is cast therein. When assembling the formwork 5, the outer circumference of the group of steel pipes 1 is surrounded by a horizontal reinforcing bar or the like, and the formwork is installed on the outer circumference.

<H> The work platform 4 is raised. Work such as raising the formwork 5, placing concrete 6, curing, and raising the formwork 5 is performed by the work scaffold 4 fixed at a fixed position.
Perform on the basis of. Therefore, when the repetitive work reaches the lifting limit, the work scaffold 4 is moved to the guide rail 3.
Rise along. In this manner, the construction of the tower is completed by repeating the raising of the work scaffold 4 and the conversion of the lowermost position of the formwork 5 to the uppermost part. After completion, the scaffold and the formwork 5 are lowered to the ground along the guide rails 3, and the guide rails 3 are dismantled by a crane or the like to complete the work.

[0015]

Since the method of constructing a tower according to the present invention is as described above, a plurality of sets of formwork 5 are used, and except for the formwork 5 on which concrete 6 is cast, the concrete 6 is cured. Can be used. Therefore, it is possible to construct a tower-shaped body made of concrete 6 which has been sufficiently cured and has good quality.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of a method of constructing a tower according to the present invention.

FIG. 2 is a plan view of an embodiment of an arrangement of a scaffold and a group of steel pipes.

FIG. 3 is an explanatory view of an embodiment of a lifting mechanism of the work scaffold 4;

FIG. 4 is an explanatory view of the embodiment in a state where the mold 5 is attached.

FIG. 5 is an explanatory view of the embodiment in a state in which the mold 5 is lifted.

Claims (2)

[Claims] 1. A steel pipe is erected within a planned construction area of a tower body, a guide rail is erected outside the planned construction area, and a work scaffold is raised along the guide rail. And concrete is poured into the inside of the first formwork assembled in a state surrounding the steel pipe group, and the second formwork assembled under the first formwork is dismantled, and the first formwork is dismantled. The second formwork is assembled on the first formwork in a state surrounding the steel pipe group, concrete is poured into the second formwork, and then the work scaffold is attached to the guide rail. Tower construction method 2. A through hole is opened in the guide rail in the horizontal direction, a vertical jack is installed on the work scaffold, and a reaction force is applied to the pin inserted into the through hole to raise the work scaffold by expansion and contraction of the vertical jack. Performing the method for constructing a tower-like body according to claim 1.