JP6071475B2 - Joint formation method - Google Patents

Description

The present invention relates to a joint structure. Specifically, the present invention relates to a joint formation method for forming joints between four columns provided in a substantially X shape along the outer peripheral surface of a building.

Conventionally, building structures such as columns and beams may be constructed using precast concrete members (see Patent Document 1).
In this case, the method for joining the precast concrete members is as follows. That is, a reinforcing bar or steel frame is exposed from the joint portion of the precast concrete member, the exposed reinforcing bar or steel frame is joined, and then the joint portion is filled with concrete or non-shrink mortar.

JP 2005-48543 A

By the way, when joining a precast concrete member, the attachment position of this precast concrete member may be adjusted. In this case, since the joint width between the precast concrete members changes, it is necessary to attach a formwork to the joint.

An object of this invention is to provide the joint formation method which forms a joint easily even if the attachment position of a precast concrete member is adjusted.

The joint formation method according to claim 1 includes four columns (for example, columns 11 to 14 described later) provided in a substantially X shape along the outer peripheral surface of a building (for example, building 1 described later). This is a joint formation method for forming joints in between (for example, horizontal joints 20A and 20B described later), and four precast concrete column members (for example, column members 30 described later) are arranged in a substantially X shape. A step (for example, step S1 to be described later), a long main body (for example, a main body 41 to be described later), and a long moving part (for example, a moving unit to be described later) provided on the main body. 42) and an interval adjusting mechanism (for example, an after-mentioned interval adjusting mechanism 43) that adjusts an interval between the main body and the moving unit, and using the joint member (for example, an after-mentioned joint member 40), the joint The lower two pillar members and the upper two members Inserting into a gap (for example, a gap d described later) with the column member, adjusting a gap between the main body and the moving portion by a gap adjustment mechanism of the joint member, and filling the gap with the joint member (for example, Step S2), which will be described later, and a step (for example, Steps S3 to S5, which will be described later) for placing concrete at the joint between the column members.

According to this invention, the joint member is inserted into the gap between the lower two column members and the upper two column members. Next, there is a step of filling the gap by adjusting the distance between the main body and the moving part by the joint member spacing adjustment mechanism. And it comprises the process of building a formwork in the junction between the pillar members and placing concrete.
Therefore, even if the gap between the lower column member and the upper column member changes by adjusting the mounting position of the lower column member and the upper column member, the width of the joint member Can be made to follow. Therefore, since the joint member plays a role as a formwork when placing concrete, the joint can be easily formed.
In addition, since it is not necessary to remove the joint member after placing the concrete, it is possible to reduce construction labor, construction process and construction waste.
Further, the joint width can be kept constant by providing the joint member.

The joint forming method according to claim 1, wherein the distance adjusting mechanism is screwed into a nut (for example, a nut 431 described later) attached to the main body and supports the moving unit at the head. And a bolt (for example, a bolt 432 described later).

According to the present invention, since the interval adjusting mechanism is configured including the nut and the bolt, the interval between the main body and the moving portion can be adjusted with a simple structure, the lower two column members and the upper two columns. The process of inserting the joint member into the gap with the member can be performed in a short time, and the joint member can be manufactured at low cost.

According to the present invention, the joint member is inserted into the gap between the lower two column members and the upper two column members. Next, there is a step of filling the gap by adjusting the distance between the main body and the moving part by the joint member spacing adjustment mechanism. And it comprises the process of building a formwork in the junction between the pillar members and placing concrete.
Therefore, even if the gap between the lower column member and the upper column member changes by adjusting the mounting position of the lower column member and the upper column member, the width of the joint member Can be made to follow. Therefore, since the joint member plays a role as a formwork when placing concrete, the joint can be easily formed. Moreover, since it is not necessary to remove a joint member after concrete placement, construction waste can be reduced as a construction labor, a construction process, and a formwork material. Further, the joint width can be kept constant by providing the joint member. Furthermore, compared to the conventional filling of concrete and non-shrink mortar in this joint, there is no cracking or chipping in the joint, and quality improvements such as the prevention of rust of the rebar due to the intrusion of rain water associated therewith Can also expect.

1 is a front view of a part of a building to which a precast concrete structure according to an embodiment of the present invention is applied. It is the elements on larger scale of FIG. It is a flowchart of the procedure which builds the pillar of the building which concerns on the said embodiment. It is the perspective view which looked at the state where the pillar member concerning the above-mentioned embodiment was joined to a support beam from the inside of a building. It is a rear view of the state which joined the pillar member concerning the embodiment to a support beam. It is AA sectional drawing of FIG. It is the top view and front view of the joint member which concern on the said embodiment. It is an expanded sectional view of the joint member concerning the embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a part of a building 1 to which a precast concrete structure according to an embodiment of the present invention is applied.
The building 1 includes a plurality of floors 2 and includes a plurality of pillars 10 along the outer peripheral surface of the building 1.
In each floor 2, as viewed from the outside, the pillars 10 are alternately arranged in two types: a pillar extending rightward as it goes upward and a pillar extending leftward as it goes upward.

FIG. 2 is a partially enlarged view of FIG.
At the floor level of each floor 2, a plurality of support beams 5, which are steel beams, are provided so as to protrude from the outer peripheral beam of the building 1, and four pillars 10 are attached to each support beam 5.

Of the four columns 10 attached to each support beam 3, the column 10 extending obliquely to the right when viewed from the outside and reaching the support beam 3 is defined as a lower left column 11, and extending obliquely to the left when viewed from the outside. 3 is the lower right column 12, the column 10 extending obliquely to the left from the support beam 3 as viewed from the outside is the upper left column 13, and the column 10 extending from the support beam 3 to the right oblique direction when viewed from the outside is the upper right column. Let it be column 14.
That is, the four pillars 11 to 14 are arranged in a substantially X shape with each support beam 3 as the center.

The pillars 11 to 14 have a rectangular cross section and have four side surfaces 10A, 10B, 10C, and 10D, respectively. Among these, the side surface facing the outside of the building 1 and the side of the support beam 3 is a side surface 10A, the side surface facing the outside of the building 1 and the side opposite to the support beam 3 is a side surface 10B, and inside the building 1 The side surface facing the support beam 3 is defined as a side surface 10C, and the side surface facing the inside of the building 1 and opposite to the support beam 3 is defined as a side surface 10D (see FIG. 4).

A horizontal joint 20A is provided between the lower left pillar 11 and the lower left pillar 13, and a horizontal joint 20B is provided between the lower right pillar 12 and the upper right pillar 14.
A vertical joint 20C is provided between the lower left pillar 11 and the lower right pillar 12, and a vertical joint 20D is provided between the upper left pillar 13 and the upper right pillar 14.

The procedure for constructing the above-mentioned pillars 11 to 14 will be described with reference to the flowchart of FIG.

In step S1, as shown in FIG. 4, four column members 30 made of precast concrete are prepared, and these four column members 30 are arranged in a substantially X shape and joined to the support beam 3.

FIG. 4 is a perspective view of the state in which the column member 30 is joined to the support beam 3 as viewed from the inside of the building 1. FIG. 5 is a rear view of the column member 30 joined to the support beam 3.

The column member 30 is a steel reinforced concrete structure, and a notch 31 is formed in a portion on the support beam 3 side. The notch 31 has a shape in which only the side surfaces 10C and 10D facing the inside of the building 1 are cut out without cutting out the side surfaces 10A and 10B facing the outside of the building 1.
The steel column 32 and the column reinforcement are exposed in the notch 31, and the steel column 32 is bolted to the support beam 3. For ease of understanding, the column bars are not shown in FIG.

At this time, the mounting position of each column member 30 with respect to the support beam 3 is adjusted. By adjusting the mounting position of each column member 30, the width of the gap d between the column members 30 adjacent to each other varies.

6 is a cross-sectional view taken along the line AA in FIG.
In step S <b> 2, the joint member 40 is inserted into the gap d between the lower two column members 30 and the upper two column members 30.

FIG. 7 is a plan view and a front view of the joint member 40. FIG. 8 is an enlarged cross-sectional view of the joint member 40.
The joint member 40 is made of steel, and has a long main body 41, a long moving portion 42 provided on the main body 41, and two spaces for adjusting the distance between the main body 41 and the moving portion 42. The gap adjusting mechanism 43 and two gap holding mechanisms 44 that hold the gap between the main body 41 and the moving unit 42 are provided.

The main body 41 has a substantially L-shaped cross section, and includes a flat plate-like base portion 411 and a rising portion 412 extending upward from one end edge of the base portion 411.
The moving portion 42 has a substantially L-shaped cross section, and includes a flat plate-like base portion 421 and a falling portion 422 extending downward from one end edge of the base portion 421.

The rising portion 412 and the falling portion 422 are arranged so as to overlap with each other, a long hole 413 extending in the vertical direction is formed in the overlapping portion of the rising portion 412, and the through hole is formed in the overlapping portion of the falling portion 422. 423 is formed.

The interval holding mechanism 44 includes a bolt 441 inserted through the holes 413 and 423 and a nut 442 screwed into the bolt 441. According to the interval holding mechanism 44, the interval between the main body 41 and the moving portion 42 is adjusted in a state where the nut 442 is loosened, and after the adjustment of the interval is completed, the nut 442 is tightened to Hold the interval.

The interval adjusting mechanism 43 includes a nut 431 attached to the main body 41 and a bolt 432 that is screwed into the nut 431 and supports the moving unit 42 at the head. According to the interval adjusting mechanism 43, by rotating the bolt 432, the projecting dimension of the bolt 432 from the nut 431 changes, and the interval between the main body 41 and the moving part 42 can be adjusted.

The distance adjustment mechanism 43 of the joint member 40 is operated to adjust the height of the moving part 42 in accordance with the gap d between the upper and lower column members 30. Thereafter, the gap holding mechanism 44 fills the gap d between the upper and lower column members 30 with the joint member 40.

In step S <b> 3, main bars and shear reinforcement bars are arranged around the steel column 32 and the support beam 3.

In step S <b> 4, a mold is built in the joint between the support beam 3 and the four column members 30.
In step S5, concrete is placed in the mold. Thereby, the pillars 11 to 14 are constructed, and the gap d into which the joint member 40 is inserted becomes the horizontal joints 20A and 20B.

According to this embodiment, there are the following effects.
(1) The joint member 40 is inserted into the gap d between the two lower column members 30 and the two upper column members 30. Next, the gap adjusting mechanism 43 of the joint member 40 adjusts the gap between the main body 41 and the moving portion 42 to fill the gap d. Then, a formwork is built in the support beams 3 between the column members 30 to place concrete.
Therefore, even if the mounting position of the lower column member 30 or the upper column member 30 is adjusted and the gap d between the lower column member 30 and the upper column member 30 changes, the change in the gap d The width of the joint member 40 can be made to follow. Therefore, since the joint member 40 plays a role as a formwork when placing concrete, the joint can be easily formed.
Moreover, since it is not necessary to remove the joint member 40 after concrete placement, construction work can be reduced.
Further, by providing the joint member 40, the joint width of the horizontal joints 20A and 20B can be kept constant.

(2) Since the interval adjusting mechanism 43 is configured by the nut 431 and the bolt 432, the interval between the main body 41 and the moving portion 42 can be adjusted with a simple structure, and the joint member 40 can be manufactured at low cost.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

d ... Gap 1 ... Building 2 ... Floor 3 ... Support beam 10 ... Column 10A, 10B, 10C, 10D ... Column side surface 11 ... Left lower column 12 ... Right lower column 13 ... Left lower column 14 ... Upper column 20A, 20B ... Horizontal joint 20C, 20D ... Vertical joint 30 ... Column member 31 ... Notch 32 ... Steel column 40 ... Joint member 41 ... Main body 42 ... Moving part 43 ... Spacing adjusting mechanism 44 ... Spacing holding mechanism 411 ... Base part 412 ... Rising part 413 ... Long Hole 421 ... Base 422 ... Falling part 423 ... Through hole 431 ... Nut 432 ... Bolt 441 ... Bolt 442 ... Nut

Claims (2)

A joint formation method for forming joints between four columns provided in a substantially X shape along the outer peripheral surface of a building,
Arranging and joining four precast concrete column members in a substantially X shape;
A joint member comprising a long main body, a long moving part provided on the main body, and a distance adjusting mechanism for adjusting a distance between the main body and the moving part is provided on the lower 2 side. Inserted into the gap between the two pillar members and the upper two pillar members, and the gap between the main body and the moving portion is adjusted by the gap adjustment mechanism of the joint member, and the gap is filled with the joint member. Process,
And a step of placing concrete in a joint portion between the column members. 2. The joint forming method according to claim 1, wherein the distance adjusting mechanism includes a nut attached to the main body, and a bolt that is screwed into the nut and supports the moving unit with a head. .

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