JP2001271496A - Method for releasing support state of upper building frame structure by concrete support member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a releasing method for simply, efficiently and inexpensively executing releasing work for the support state of an upper building frame structure by a concrete support member in a short time. SOLUTION: In forming the concrete-made support member 2, an intermediate filling block 3 is provided to separate from the support member 2 and partially part the support member 2. In releasing the support state of the upper building frame structure 1, the intermediate filling block 3 in the support member 2 in the support member 2 is drawn out. That is, by such a simple method that in forming the upper building frame structure 1, the intermediate filling block 3 is built in, and in releasing the support state, the intermediate filling block 3 is drawn out, the support state of the upper building frame structure 1 by the support member 2 is released. For example, in base isolation work for providing an existing building 4 with a base isolation layer, in the case of supporting (temporarily bearing) the upper building frame structure 1 of the existing building 4 by the concrete support member 2, the release work for the support state can be executed simply, in a short time, efficiently and inexpensively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a release method for releasing a support state of a concrete support member formed below an upper skeleton structure to support the upper skeleton structure.

[0002]

2. Description of the Related Art For example, in seismic isolation work in which an existing building is provided with a seismic isolation layer, a concrete supporting material (RC wall or RC column) is used to support (temporarily receive) an upper frame structure of the existing building. May be performed.

[0003] It is necessary to release the support state of the upper skeleton structure by such a concrete support member after the seismic isolation work is completed.

[0004] Conventionally, as a method of releasing the support state of this type, there is a method of releasing the support state of the upper skeleton structure by the concrete support material by cutting the concrete support material using a concrete cutter. Generally known.

[0005]

For example, when an existing building is seismically isolated, the seismic isolation work is performed in a narrow space having a seismic isolation layer.

Therefore, in the above-mentioned conventional releasing method, it is necessary to cut concrete in a narrow space serving as a seismic isolation layer using large-scale construction equipment such as a concrete cutter.

[0007] Therefore, in the conventional releasing method, it is necessary to use a concrete cutter or the like which is difficult in a narrow space, and it is necessary to perform the work of cutting the concrete and the work requires danger. Efficiency becomes worse, and the cost and construction time for releasing the support state increase.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object to provide an upper frame structure made of a concrete supporting material which can efficiently and inexpensively release the state of supporting the upper frame structure in a short time. It is an object of the present invention to provide a method for releasing an object supporting state.

[0009]

According to the releasing method of the present invention, when forming a concrete supporting material, a filling block which can be separated from the concrete for the supporting material and which can partially separate the concrete supporting material is provided. deep.

[0010] Release of the support state of the upper skeleton structure by the concrete support member is performed by pulling out the middle block in the concrete support member.

In other words, according to the present invention, the support state of the upper skeleton structure by the concrete supporting material can be released by a simple method such as pulling out a filling block provided in advance when forming the concrete supporting material. I have to.

From the above, according to the release method of the present invention, for example, in seismic isolation construction work in which a seismic isolation layer is provided in an existing building, the upper skeleton structure of the existing building is supported by a concrete support material (temporary). In this case, the releasing operation for releasing the supporting state can be performed simply, efficiently, and inexpensively.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for releasing a state in which an upper skeleton structure is supported by a concrete support member according to the present invention will be described below with reference to the illustrated embodiments.

A release method for releasing the support state of the upper skeleton structure 1 by the concrete support member 2 formed for supporting the upper skeleton structure 1 (see FIGS. 1 and 2) is as follows.
At the time of forming the concrete support 2, an intermediate block 3 that can be separated from the concrete for the support 2 and that can partially separate the concrete support 2 is provided.

The support of the upper skeleton structure 1 by the concrete support member 2 is released by pulling out the middle block 3 in the concrete support member 2.

In this embodiment, as shown in FIG. 1, a seismic isolation device 8 is interposed between each column 6 of the base part 5 of the existing building 4 and each column 7 of the upper skeleton structure 1. The so-called seismic isolation work for forming a so-called seismic isolation layer between the base portion 5 and the upper skeleton structure 1 employs the release method of the present invention.

The release method of the present invention can be applied not only to the seismic isolation work for forming the seismic isolation layer as in the embodiment shown in FIG. 1 but also to general temporary work.

Concrete support member 2 in this embodiment
Supports the upper skeleton structure 1 at the stage until each seismic isolation device 8 is interposed. Further, the concrete support member 2 here is constituted by an RC wall.

As shown in FIGS. 2 (a) and 2 (b), the middle block 3 in this embodiment is composed of an upper separating plate 9 and a lower separating plate 10 for separating from the cast concrete.
It is provided so as to be slidable with a predetermined force.

In this embodiment, a sliding layer 14 such as a Teflon plate is provided between the upper separating plate 9 and the lower separating plate 10 and the centering block 3 so as to be slidable. Can be easily performed with a predetermined force.

In addition, the centering block 3 in this embodiment
As shown in FIG. 2 (b), a pulling hook 11 used at the time of pulling out is provided.

As shown in FIGS. 1 and 2A, the upper separating plate 9 and the lower separating plate 10 in this embodiment
As shown in FIG. 2 (b), it extends in the longitudinal direction of the concrete supporting member 2 composed of a wall and also extends in the width direction of the concrete supporting member 2 so that both ends protrude outside the supporting member. ing.

The upper separating plate 9 and the lower separating plate 10 include:
Utilizing the protruding portion, as shown in FIG. 2B, a tightening bolt 12 is provided to tighten the upper and lower separation plates. That is, by the tightening force of the tightening bolts 12, the middle block 3 is sandwiched between the upper separating plate 9 and the lower separating plate 10.

As shown in FIG. 2, the upper separating plate 9 and the lower separating plate 10 are provided with stud bolts 13 protruding into the concrete supporting member 2. The upper separating plate 9 and the lower separating plate 10 are fixed to the concrete support 2 by the stud bolts 13.

When the seismic isolation work of providing a seismic isolation layer in an existing building using the above-structured release method of the present invention is performed, the following procedure is performed.

First, a concrete support for supporting (temporarily receiving) the upper skeleton structure 1 on a portion of the existing building 4 to be a seismic isolation layer (a portion between the base portion 5 and the upper skeleton structure 1). The material 2 is formed.

The concrete support member 2 is formed in advance in a forming form (not shown) by using a tightening bolt 12.
This is carried out by providing a middle block 3 sandwiched between the upper separating plate 9 and the lower separating plate 10 by the tightening force, and then placing concrete for the support material 2 in the formwork.

As shown in FIG. 1, the position where the filling block 3 is provided is an upper portion of the concrete support 2.

The upper separating plate 9 and the lower separating plate 10 are
The concrete (not shown) cast in the formwork is integrated with the stud bolt 12 and fixed to the concrete support 2.

Next, reinforcement work for the base portion 5 of the existing building 4 and the upper skeleton structure 1 is performed, and each pillar 6 of the base portion 5
The installation work of the seismic isolation device 8 is performed between the and the columns 7 of the upper skeleton structure 1.

The state up to this point is as shown in FIG. Next, when it becomes possible to support the upper skeleton structure 1 by the seismic isolation device 8 provided on the base portion 5, as shown in FIG.
The filling block 3 is pulled out with a predetermined force by using the pulling hook 11.

In other words, the removal of the middle block 3 is as follows.
A reaction force is taken from another place using a chain block or the like, and the pulling hook 11 is used.

As shown in FIG. 4, the support of the upper skeleton structure 1 by the support member 2 made of concrete is released by pulling out the filling block 3, and the seismic isolation device 8 provided on the base portion 5 is released. The upper frame structure 1 is supported.

That is, the seismic isolation work for providing the seismic isolation layer in the existing building 4 is completed. As described above, according to the releasing method of the present invention, when forming the concrete support 2 for supporting (temporarily receiving) the upper skeleton structure 1, the concrete support 2 is previously provided in the forming frame. Filled block 3
The support state of the upper skeleton structure 1 by the concrete support member 2 can be released by a simple method such as pulling out when the support state of the concrete support member 2 is released.

More specifically, based on this embodiment, the tools required for the support release operation are only tools such as a bolt wrench used for removing the fastening bolt 12 and a chain block used for pulling out the filling block 3.

As a result, large equipment such as a concrete cutter, which is necessary in the above-described conventional release method, is not required, and the support release operation can be performed by a small number of people. Becomes easy.

Furthermore, the elimination of a concrete cutter eliminates any noise or vibration during concrete cutting by the concrete cutter, which is optimal for seismic isolation work while using the existing building 4.

Further, the installation of the filling block 3 in the concrete support 2 and the pulling out of the concrete support 2 are performed by using the upper separating plate 9 and the lower separating plate 10 and the tightening bolts 12. Thereby, it can be easily performed in a short time.

From these facts, according to the release method of the present invention, for example, in the seismic isolation construction work in which a seismic isolation layer is provided in the existing building 4, the upper skeleton structure 1 of the existing building 4 is replaced with the concrete supporting material 2. In the case of supporting (temporarily receiving), the releasing operation for releasing the supporting state can be performed easily, efficiently and inexpensively in a single time.

FIG. 5 shows another embodiment of the concrete supporting member 2 used in the releasing method of the present invention. The concrete support member 2 here is constituted by RC columns.

The installation of the filling block 3 in the concrete support member 2 using the tightening bolts 12, the upper separating plate 9 and the lower separating plate 10 ((a) and (b) of FIG. 6).
1) and withdrawal from the inside of the concrete support member 2 are performed in the same manner as in the embodiment shown in FIG.

Further, the filling blocks 3 are provided at two places, an upper part and a lower part of the concrete support member 2 (RC column). Therefore, when each of these filling blocks 3 is pulled out, the concrete supporting material 2 (RC support) is used.
Will be removed.

FIG. 7 shows another embodiment of the concrete supporting member 2 and the filling block 3 used in the releasing method of the present invention. As in the embodiment shown in FIG. Are composed of RC columns.

The middle block 3 is provided only at a substantially central portion of the concrete support member 2 (RC column). Thus, the concrete support 2 (RC
The centering block 3 provided on the column) may be provided at one place.

The middle block 3 is divided into two parts by using two structural blocks 3a each having a half of the column width of the concrete support member 2 (RC column).

In this way, the pulling out of the filling block 3 can be achieved by pulling out each component block 3a separately. Therefore, the middle block 3 can be pulled out with half the force of pulling out one middle block 3 over the entire column width of the concrete support member 2 (RC column).

The concrete supporting material 2 here
(RC column) is the upper frame structure 1 at the upper and lower ends.
The joint between the base and the base portion 5 is a dowel seam with a cut edge, and reference numeral 17 in FIG. 7 is a dowel pin.

FIG. 8 shows another embodiment of the concrete supporting member 2 used in the releasing method of the present invention.
In the same manner as in the embodiment shown in (1), the filling block 3 is provided only at one position substantially at the center of the concrete support 2 (RC column).

The concrete support member 2 (RC column) is constructed by stacking a plurality of constituent blocks 2a. In this way, the concrete support member 2 (RC column) can be easily configured in a short time.

FIG. 9 shows another embodiment of the concrete support member 2 and the filling block 3 used in the releasing method of the present invention. As in the embodiment shown in FIG. Concrete support 2 (RC column)
Is provided only at a substantially central portion in one place.

Here, the centering block 3 corresponds to (a) of FIG.
As shown in (1), the upper surface is constituted by an inclined wedge.

As shown in FIGS. 9 (a) and 9 (b), the peripheral surface of the concrete supporting member 2 (RC column), which is the portion where the wedge-shaped intermediate block 3 is provided, is provided. There are provided two anti-separation plates 15 which are integrated and wound by the anti-separation bolts 16.

In this way, by removing the filling prevention plate 15, the filling block 3 can be easily pulled out by its wedge action. Therefore, the middle block 3 can be pulled out without requiring a large force.

FIG. 10 shows another embodiment of the concrete supporting member 2 and the filling block 3 used in the releasing method of the present invention.

As in the embodiment shown in FIG. 7, the middle block 3 is formed by using two structural blocks 3a each having a half of the column width of the concrete support member 2 (RC column). It has been split into two parts. Moreover, each constituent block 3a is a wedge body with its lower surface inclined.

In this way, the middle block 3 can be easily pulled out in a shorter time than the wedge body center block 3 in the embodiment shown in FIG.

In this embodiment, since the middle padding block 3 composed of the constituent blocks 3a of the wedge body is used, the concrete supporting member 2 (RC
On the peripheral surface of the support (post), there are provided two solid-fill separation preventing plates 15 which are integrated into a wound state with solid-fill separation preventing bolts 16.

[0058]

According to the present invention, concrete can be removed by a simple method such as pulling out a filling block provided in advance at the time of forming a concrete supporting material for supporting an upper frame structure when the supporting state is released. The support of the upper skeleton structure by the support material can be released.

Therefore, according to the cancellation method of the present invention,
For example, in the case of seismic isolation work in which an existing building is provided with a seismic isolation layer, when the upper skeleton structure of the existing building is supported (temporarily received) with concrete support materials, the release work to release the support state can be easily performed. It can be implemented efficiently and inexpensively in a single time.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a state in which an upper skeleton structure is supported by a concrete support member provided with a middle-filled block used in the release method of the present invention.

2A is an enlarged schematic view of a portion A in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line BB of FIG.

FIG. 3 is a schematic view showing a state in which a middle block used in the present invention is pulled out.

FIG. 4 is a schematic diagram showing a state in which the middle block used in the releasing method of the present invention is pulled out and the support of the upper skeleton structure by the concrete supporting material is released.

FIG. 5 is a schematic view showing another embodiment of a concrete support member provided with an intermediate block used in the releasing method of the present invention.

6 (a) is an enlarged schematic view of a portion C in FIG. 5, and FIG. 6 (b) is a view taken along line DD of FIG. 6 (a).

FIG. 7 is a schematic view showing another embodiment of the concrete supporting material and the filling block used in the releasing method of the present invention.

FIG. 8 is a schematic view showing another embodiment of a concrete support member used in the releasing method of the present invention.

FIG. 9A is a schematic view showing another embodiment of the concrete supporting material and the filling block used in the releasing method of the present invention, and FIG. 9B is a cross-sectional view.

FIG. 10 is a schematic view showing another embodiment of the concrete supporting material and the filling block used in the releasing method of the present invention.

[Explanation of symbols]

1: Upper frame structure, 2: Concrete support, 2a ...
Construction block, 3 ... Filled block, 3a ... Construction block, 4 ... Existing building, 5 ... Foundation, 6 ... Pillar, 7 ... Pillar,
8 ... seismic isolation device, 9 ... upper separating plate, 10 ... lower separating plate, 11 ...
Hook for pulling out, 12 ... Tightening bolt, 13 ... Stud bolt, 14 ... Sliding layer, 15 ... Plate for preventing solid filling separation, 16 ... Bolt for preventing solid filling separation, 17 ... Dowel pin.

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Claims (2)

[Claims] 1. A method for releasing a state of support by a concrete support material formed for supporting an upper skeleton structure, wherein the concrete support material can be separated from the concrete for the support material when the concrete support material is formed. An intermediate block capable of partially dividing the support member is provided, and the release of the upper skeleton structure supported by the concrete support member is performed by pulling out the intermediate block in the concrete support member. A method for releasing a state in which an upper skeleton structure is supported by a concrete support member. 2. The method according to claim 1, wherein the filling block is provided so as to be slidable with a predetermined force by an upper separating plate and a lower separating plate for separating from the concrete for supporting material. The method for releasing a state in which an upper skeleton structure is supported by a concrete support member according to claim 1.