JP2001059346A - Transfer method for column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationally and economically perform column transferring works by connecting joint plates provided in the side face of a reinforcing post erected in parallel to an existing column at a horizontal transfer distance apart therefrom to the existing column, arranging a PC steel in the reinforcing post, waiting the hardening of the filled concrete, and removing a defective part of the existing column. SOLUTION: A reinforcing post 2 provided with joint plates 5 with such a dimension as presetting a horizontal transfer distance S therein in its side faces of the top end and the bottom end is erected along an existing column 1 between a slab 3 and an underground beam 4 and the ends of the joint plates 5 are connected to the side face of the existing column 1 by welding, etc. The provision of the joint plates 5 can facilitate the retaining of the existing column 1 and the reinforcing post 2 in a prescribed separated interval. The end of a PC steel 6 prearranged inside the reinforcing post 2 is fixed to the slab 3 and the reinforcement of the underground beam 4, so that the PC steel 6 is tensioned. Filler concrete is placed in the reinforcing post 2, and after hardening it and prestressing the post by the PC steel 6, a removal part 1a, or a defect of the existing column 1 is removed. This rationalized work process enables the efficient and economical construction taking account of the safety.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for relocating an existing pillar.

[0002]

2. Description of the Related Art With the extension and remodeling work, there is a case where the position of an existing pillar is hindered and the pillar is relocated. In such a case,
Since existing slabs and floors exist above and below the existing columns, they have become obstacles to the relocation of the columns, making it difficult to perform efficient and economical construction.

Conventionally, when a new pillar is constructed between an existing slab and a floor, when the pillar is made of reinforced concrete, the reinforcing steel of the existing slab or the floor is cut out, and the new pillar reinforcing steel is welded and assembled to leave a space under the slab. Concrete form is poured from the space under the slab, and concrete is filled into the space under the slab after dismantling the formwork. When the pillar is a steel pipe pillar The existing slab and the reinforcing bar of the floor are cut out and welded with the new steel pipe pillar to assemble.

[0004] However, according to the conventional method, there is a problem that the work steps are congested, it is difficult to carry out efficient and economical construction, and safe work cannot be performed.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of relocating a pillar which can perform a reasonable and economical construction and can perform a safe operation in order to solve the above-mentioned problems.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a supporting column having a joining plate on a side surface is erected in parallel with an existing column at a horizontal transfer distance, and the joining plate is connected to the existing column. PC in
Placing steel material, filling concrete in the supporting pillar, PC
This is a method of relocating a column, which comprises removing a hindrance portion of an existing column after the filled concrete is hardened by tensioning a steel material.

[0007]

[Embodiment 1] An example in which the column to be relocated is a steel pipe column will be described below.

<A> Existing Pillar FIG. 1 is a side view showing a state in which the supporting pillar 2 is erected in parallel along the existing pillar 1 and the obstruction portion 1a of the existing pillar 1 is removed, and FIG. It is a perspective view. The existing column 1 is made of, for example, a steel tube column, and is erected and fixed between the slab 3 and the underground beam 4. Along with the extension and remodeling work, the middle part of the existing pillar 1 becomes the obstacle 1a. Therefore, the slab 3 must be supported by moving the position of the existing column 1 by a horizontal transfer distance S to a position where it does not cause any trouble.

<B> Attached Pillar The attached pillar 2 is a pillar itself to be relocated, and is a hollow steel pipe. The horizontal transfer distance S
Is previously attached by welding or the like. The length of the supporting pillar 2 is the obstacle 1 of the existing pillar 1.
The length is a length obtained by adding the length of “a” and the dimension of the joining plate 5 that joins the auxiliary pillar 2 to the existing pillar 1. The cross section of the supporting column 2 may have a sectional strength corresponding to that of the existing column 1 or more.
The number and the cross-sectional shape of the can be determined arbitrarily. FIG.
FIG. 5 is a perspective view showing a state in which one existing pillar 1 is reinforced by two auxiliary pillars 2 and moved by a horizontal movement amount S to a position where no hindrance occurs.

<C> Joining Plate The joining plate 5 is, for example, a strip-shaped steel plate. The joining plate 5 is attached to the upper and lower side surfaces of the supporting column 2 by welding or the like in advance. The side surface of the existing column 1 and the side surface of the supporting column 2 are connected by welding or the like via the joining plate 5.

<D> PC steel material PC steel material 6 is a tension steel material for introducing prestress into the filled concrete 7 cast in the supporting column 2.
The number required for design is previously arranged in the supporting column 2, and both ends of the PC steel material 6 are fixed to the slab 3 and the reinforcing steel of the underground beam 4.

[0012]

The operation of the present invention will be described below.

<A> Installation and connection of side pillars The side pillars 2 are built between the slab 3 and the underground beam 4. Existing pillar 1
Is set at a position shifted from the standing position of the existing column 1 by a horizontal transfer distance S that does not cause any trouble. On the side surfaces of the upper end and the lower end of the supporting column 4, a joining plate 5 having a dimension considering the horizontal transfer distance S is provided in advance.
Therefore, the supporting pillar 2 is erected along the existing pillar 1, and the end of the joining plate 5 is brought into contact with the side surface of the existing pillar 1, thereby maintaining the existing pillar 1 and the supporting pillar 2 at a predetermined distance. it can. After the end of the joining plate 5 comes into contact with the side surface of the existing column 1, it is connected by welding or the like.

<B> Tension of PC steel material PC steel material 6 is arranged in the hollow inside of the supporting column 2 in advance. The end of the PC steel material 6 is fixed to the slab 3 and the reinforcing bar of the underground beam 4 during the work of installing and connecting the attached pillar 2, and the PC steel material 5 is fixed.
Nervous. The tension of the PC steel material 6 may be either a pretension type or a post tension type.

<C> Filling of concrete Filled concrete 7 is cast into the supporting pillar 2. Depending on whether a pretensioning method or a posttensioning method is used for placing concrete 7, PC steel 6
The work order of the tensioning work and the placing work of the filled concrete 7 must be changed. The concrete placing operation is performed by a conventional method such as pumping.

<D> Removal of Existing Column After the concrete 7 has hardened and the prestress by the PC steel 6 has been introduced into the concrete 7, the removed portion 1 a that hinders the existing column 1 is removed. The removal part 1a is removed by a conventional method. The remaining portion of the existing pillar 1 that does not hinder is left as it is connected to the supporting pillar 2 by the joining plate 5 as it is. Before the removal of the removed portion 1a, concrete is poured into the remaining portion to reinforce the remaining portion of the existing pillar 1 before the removal of the remaining portion.

[0017]

Second Embodiment FIG. 3 is a side view showing another embodiment. In the present embodiment, the removed portion 1a that interferes with the existing column 1 is long, and the upper end of the removed portion 1a is
It is a position close to the lower surface of. Therefore, at the time of building and connecting the supporting column 2, the concrete around the existing column 1 buried in the slab 3 is cut out and exposed.
The joining plate 5 is connected to the exposed portion of the existing column 1. PC steel 6
Of the concrete and the placing of the filled concrete 7 are as described in the first embodiment.
Therefore, the description is omitted. After the relocation of the columns is completed, the exposed portions of the existing columns 1 are repaired by filling them with concrete or the like.

[0018]

Third Embodiment FIG. 4 is a side view showing still another embodiment. In the present embodiment, the removed portion 1a that is an obstacle to the existing column 1 is longer, the upper end of the removed portion 1a approaches the lower surface of the slab 3, and the lower end of the removed portion 1a approaches the upper surface of the underground beam 4. It has become. Since the installation position of the supporting column 2 is separated from the existing column 1 and the lower end of the supporting column 2 is separated from the underground beam 4 or the pile 8, the fixing and tensioning work of the PC steel material 6 may not be performed. For this reason, when installing and connecting the supporting pillars 2, the existing piles 8 and the underground beams 4 are widened. Underground beam 4 and pile 8 supporting existing column 1
Is concretely cast to the installation position of the pillar to be relocated (attachment pillar 2) and widened. The widening concrete 9 is the underground beam 4
And the stake 8 by, for example, an anchor 10.
The upper end of the PC steel 6 is fixed to the reinforcing bar of the slab 3, and the lower end of the PC steel 6 is fixed to, for example, an anchor 10, and the PC steel 6 is tensioned. When it is not necessary to perform the widening work of the underground beam 4 and the pile 8 depending on the installation positional relationship of the auxiliary pillar 2 (Embodiment 1 or 2), or either the underground beam 4 or the pile 8 When widening work is performed,
This is an application of the above-described method, and the description is omitted.

[0019]

Since the present invention has been described above,
The following effects can be obtained. <A> Since the method of constructing the supporting pillars on which the PC steel materials are arranged is adopted, efficient and economical construction can be performed by a rational work process. <B> Since a joining plate having dimensions that satisfy the horizontal transfer distance from the existing pillar is previously attached to the side surface of the supporting pillar by welding or the like, the existing pillar and the supporting pillar can be easily maintained at a predetermined spacing. Can be. <C> Since the existing column and the auxiliary column are connected via the joining plate, a plurality of auxiliary columns corresponding to the cross-sectional strength of the existing column can be installed, and the degree of freedom in the method of transferring the column is increased. <D> The method of widening and reinforcing the existing piles and underground beams and constructing the auxiliary pillar on which the PC steel material is arranged increases the range of the horizontal transfer distance from the existing pillar. <E> Safe work can be performed without congestion in the column relocation work. <F> Since the supporting pillar is constructed by tensioning the PC steel material fixed to the anchor of the widened portion, it is possible to perform structurally reliable construction.

[Brief description of the drawings]

FIG. 1 is a side view of a method for relocating a pillar according to the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a side view showing another embodiment.

FIG. 4 is a side view showing still another embodiment.

Claims (1)

[Claims] 1. A supporting column having a joining plate on a side surface is erected in parallel with an existing column at a horizontal transfer distance, a joining plate is connected to the existing column, and a PC steel material is arranged in the supporting column. A method of relocating a pillar, comprising filling concrete in a supporting pillar, tensioning a PC steel material, and curing the filled concrete, and removing a hindrance of an existing pillar.