JP2020169514A - Joint structure - Google Patents

Abstract

To provide a joint structure capable of reliably transmitting force between an existing skeleton and a new skeleton.SOLUTION: A joint structure 50 is a joint structure for joining a first existing wall 11 and a new pile 20 formed separately from the first existing wall 11, comprising a concrete body 60 provided between the first existing wall 11 and the new pile 20 and a first connecting member 70 inserted through the concrete body 60 and for connecting the first existing wall 11 and the new pile 20.SELECTED DRAWING: Figure 3

Description

The present invention relates to a bonded structure.

Conventionally, as one of the technologies for joining the existing skeleton and the new skeleton, a steel material attached to the surface of the existing skeleton with an adhesive and an anchor embedded in the new skeleton by being projected from the surface of the steel material. , A structure including an angle material attached by an adhesive to a joint portion between an existing skeleton and a new skeleton has been proposed.

Japanese Unexamined Patent Publication No. 2008-208643

However, in the above-mentioned conventional structure, the steel material is attached to the surface of the existing skeleton with an adhesive, and the angle material is attached to the joint portion between the existing skeleton and the new skeleton with an adhesive. For example, when an external force is applied to either the existing skeleton or the new skeleton, the external force is sufficient for either the existing skeleton or the new skeleton depending on the adhesive state of the adhesive attached to the steel material or the angle material. There was room for improvement from the viewpoint of ensuring the transmission of force between the existing skeleton and the new skeleton because there is a risk that it will not be able to be transmitted to.

The present invention has been made in view of the above, and an object of the present invention is to provide a joined structure capable of reliably transmitting a force between an existing skeleton and a new skeleton. ..

In order to solve the above-mentioned problems and achieve the object, the joint structure according to claim 1 is a joint structure for joining an existing skeleton and a new skeleton formed separately from the existing skeleton. A body, which is a concrete body provided between the existing skeleton and the new skeleton, and a first connecting member inserted into the concrete body to connect the existing skeleton and the new skeleton. The first connecting member of the above is provided.

The joint structure according to claim 2 includes a second connecting member for connecting at least one of the existing skeleton or the new skeleton to the concrete body in the joint structure according to claim 1. ..

The joint structure according to claim 3 is the joint structure according to claim 2, wherein the first connecting member is a bolt member, and the second connecting member is a stud member or an anchor member.

The joint structure according to claim 4 is the joint structure according to any one of claims 1 to 3, wherein the existing skeleton is an existing outer wall, and the new skeleton is a new Yamadome pile. Is.

According to the joint structure according to claim 1, the concrete body provided between the existing skeleton and the new skeleton and the first connecting member inserted through the concrete body, the existing skeleton and the new skeleton are formed. Since the first connecting member for connecting is provided, the existing skeleton and the new skeleton can be joined via the joining structure, and the existing skeleton and the new skeleton can be integrated. In addition, the external force acting on either the existing skeleton or the new skeleton can be transmitted to either the existing skeleton or the new skeleton via the joining structure, and the conventional technique (joining the existing skeleton and the new skeleton). Compared with the technique of connecting the members for the purpose to the existing skeleton or the new skeleton with an adhesive), it is possible to reliably transmit the force between the existing skeleton and the new skeleton. In addition, since it is possible to form a structure (for example, a mountain retaining wall) using an existing skeleton and a new skeleton, it is possible to reduce the labor of dismantling the existing skeleton and reduce the environmental load by leaving the existing skeleton. By integrating the skeleton and the newly installed skeleton, the rigidity of the structure can be increased and the number of beam steps can be reduced. Therefore, it is possible to increase the size of heavy machinery and the like used for dismantling other existing skeletons and increase the number of heavy machinery and the like, and it becomes easy to rationalize the dismantling of the existing skeleton.

According to the joint structure according to claim 2, since the second connecting member for connecting at least one of the existing skeleton and the new skeleton and the concrete body is provided, the joint structure can be attached to either the existing skeleton or the new skeleton. The acting external force (particularly, shearing force) can be transmitted to either the existing skeleton or the new skeleton via the second connecting member. Further, for example, the number of the first connecting members and the like can be reduced as compared with the case where the second connecting member is not provided, and it becomes easy to reduce the manufacturing cost of the joined structure.

According to the joint structure according to claim 3, since the first connecting member is a bolt member and the second connecting member is a stud member or an anchor member, the first connecting member and the second connecting member are compared. It can be constructed at a low cost, and the manufacturing cost of the bonded structure can be reduced.

According to the joint structure according to claim 4, since the existing skeleton is an existing outer wall and the new skeleton is a new mountain retaining pile, the existing outer wall and the newly installed mountain retaining pile are used for the mountain retaining wall. Can be formed. Therefore, by leaving the existing outer wall, the labor of dismantling the existing outer wall can be reduced and the environmental load can be reduced, and the rigidity of the mountain retaining wall can be increased by integrating the existing outer wall and the newly installed mountain retaining pile. In addition, it can contribute to the reduction of the number of girder steps, so that the size of heavy machinery used for dismantling other existing outer walls can be increased and the number of heavy machinery can be increased, making it easier to rationalize the dismantling of existing outer walls. Become.

It is a top view which conceptually shows the basement floor of the building which concerns on embodiment of this invention (partially not shown). FIG. 1 is a cross-sectional view taken along the line AA of FIG. 1 (partially omitted). It is an enlarged view of the area around the joint structure of FIG. It is a plan view of FIG. 3 (partially not shown). It is a side view of FIG. 3 (partially not shown).

Hereinafter, embodiments of the bonded structure according to the present invention will be described in detail with reference to the accompanying drawings. First, the basic concept of the embodiment of [I] will be described, then the specific contents of the embodiment of [II] will be described, and finally, a modification of the embodiment of [III] will be described. However, the present invention is not limited to the embodiments.

[I] Basic concept of the embodiment First, the basic concept of the embodiment will be described. Embodiments generally relate to a joining structure for joining an existing skeleton and a new skeleton formed separately from the existing skeleton. Here, the "building" provided with the "existing skeleton" and the "new skeleton" is a building having one or more floors, and is partially newly constructed after a part of the existing building is demolished. is there. This "building" is a concept including, for example, an apartment building such as an apartment or an apartment, an office building, a commercial facility, a public facility, a factory facility, etc., but in the embodiment, it is an office building having a basement floor. , Explain as an office building in the middle of constructing the basement floor. Further, the "existing skeleton" means a skeleton that is not removed after the dismantling of the existing building among the skeletons (for example, columns, beams, walls, floors, etc.) constituting the above building, and the embodiment. Then, it will be described as an existing outer wall or inner wall located in the vicinity of the new building. Further, the "new skeleton" means a newly constructed skeleton (that is, a skeleton formed separately from the existing skeleton) among the skeletons constituting the above building, and in the embodiment, the newly constructed Yamadome Described as a stake or inner wall.

[II] Specific contents of the embodiment Next, the specific contents of the embodiment will be described.

(Constitution)
First, the configuration of the joint structure 50 according to the embodiment and the configuration of the building 1 in which the joint structure 50 is installed will be described.

(Composition-Building)
First, the structure of the building will be described. FIG. 1 is a plan view conceptually showing the basement floor of the building 1 according to the embodiment of the present invention (partially not shown). FIG. 2 is a cross-sectional view taken along the line AA of FIG. In the following description, the X direction of FIG. 1 is the left-right direction of the building 1 (-X direction is the left direction of the building 1, the + X direction is the right direction of the building 1), and the Y direction of FIG. 1 is the front-back direction of the building 1 (+ Y). The direction is the front direction of the building 1, the -Y direction is the rear direction of the building 1, the Z direction in FIG. 1 is the vertical direction of the building 1 (+ Z direction is the upward direction of the building 1, and the -Z direction is the downward direction of the building 1). It is called.

Building 1 is, for example, a reinforced concrete building, which is provided in a predetermined site, and as shown in FIGS. 1 and 2, floors (not shown), beams (not shown), pillars (not shown), It is equipped with a wall 10 and a new pile 20.

(Composition-Building-Floor, Beams, Pillars)
The floors constitute the floor of the building 1, and a plurality of floors are arranged side by side in the vertical direction at intervals from each other. Further, the pillars support the floor, and a plurality of pillars are provided between the floors (that is, spaces on each floor of the building 1). Further, the beams support the floor, and a plurality of beams are provided so as to be in contact with the lower surface of each floor.

(Composition-Wall)
Returning to FIG. 1, the walls 10 are for partitioning the floors from each other, and a plurality of walls 10 are provided between the floors. Further, as shown in FIGS. 1 and 2, the wall 10 includes a first existing wall 11, a second existing wall 12, and a new wall 13. In addition, each of the "first existing wall 11" and the "second existing wall 12" corresponds to the "existing skeleton" in the claims, and the "new wall 13" corresponds to the "new skeleton" in the claims. Correspond.

(Structure-Wall-First existing wall, Second existing wall, New wall)
In the embodiment, the first existing wall 11 is configured by using an existing outer wall (for example, an outer wall made of concrete), and as shown in FIG. 1, a plurality of first existing walls 11 are provided on the outer edge of the basement floor of the building 1. There is. Further, the second existing wall 12 is configured by using an existing inner wall (for example, an inner wall made of concrete) in the embodiment, and as shown in FIG. 1, the first existing wall in the basement floor of the building 1 A plurality of them are provided on the indoor side of the building 1 rather than 11. Further, the new wall 13 is configured by using a new inner wall (for example, an inner wall made of concrete) in the embodiment, and as shown in FIG. 1, in the vicinity of the new pile 20 in the basement floor of the building 1. It is provided.

Here, the specific configuration of the first existing wall 11 is arbitrary, but in the embodiment, as shown in FIG. 2, it is formed of a thick rectangular body having an L-shaped vertical cross section. The L-shaped horizontal bar portion is arranged so as to project toward the indoor side of the building 1. In the following, the L-shaped horizontal bar portion 11a of the first existing wall 11 will be referred to as a “lower protruding portion 11a”.

The reasons why the first existing wall 11 and the second existing wall 12 were left without being removed when the building 1 was demolished are as follows. That is, first, when the first existing wall 11 and the second existing wall 12 are dismantled and an attempt is made to install a backfill material, the cost for dismantling and removing the first existing wall 11 and the second existing wall 12 and the backfill material There is a risk of increasing the installation cost of the building 1 because of the cost for the installation of the building 1. In addition, there is a risk of a disaster such as the collapse of the ground G when the first existing wall 11 or the like is dismantled or carried out, or the backfill material is carried in or installed. From the above, in order to avoid these problems, the first existing wall 11 and the second existing wall 12 are left without being removed when the building 1 is demolished.

(Composition-new pile)
Returning to FIG. 1, the new pile 20 is a new skeleton for supporting the first existing wall 11 via the joint structure 50. In the embodiment, the new pile 20 is configured by using a newly installed pile (for example, a core material for a steel pile), and as shown in FIGS. 1 and 2, the basement of the building 1 is used. A plurality of floors are provided near the first existing wall 11.

The specific configuration of the new pile 20 is arbitrary, but in the embodiment, it is as follows.

That is, the new pile 20 is formed of a long H-shaped steel, and specifically, as shown in FIG. 4 described later, the first flange portion 21 located on the outdoor side of the building 1 and the building. It has a second flange portion 22 located on the indoor side of No. 1 and a web portion 23 connecting the first flange portion 21 and the second flange portion 22. Further, as shown in FIG. 2, the new pile 20 is installed so that the longitudinal direction of the new pile 20 is along the vertical direction, and the upper end portion of the new pile 20 and its vicinity are below the first existing wall 11. It is installed so as to be located above the side protrusion 11a.

Further, a connecting portion 24 is provided at the indoor end of the building 1 in the second flange portion 22 of the new pile 20. The connecting portion 24 is a connecting means for connecting the first connecting member 70, which will be described later, to the new pile 20. The connecting portion 24 is configured by using, for example, a long steel plate material (for example, an angle material), and the longitudinal direction of the connecting portion 24 is along the front-rear direction as shown in FIG. 4 described later. In addition to being provided, a plurality of them are juxtaposed in the vertical direction at intervals from each other (four are juxtaposed in FIG. 5 described later). Then, they are connected to the second flange portion 22 by welding or the like.

(Structure-joint structure)
Next, the configuration of the joint structure 50 will be described. FIG. 3 is an enlarged view of a region around the joint structure 50 of FIG. FIG. 4 is a plan view of FIG. 3 (partially not shown). FIG. 5 is a side view of FIG. 3 (partially not shown). The joint structure 50 is for joining the first existing wall 11 and the new pile 20. As shown in FIGS. 2 to 5, the joint structure 50 is provided between the first existing wall 11 and the new pile 20, and is provided with a concrete body 60, a first connecting member 70, and an existing side second. It includes a connecting member 80 and a new connecting member 90 on the new installation side.

(Structure-joint structure-concrete body)
The concrete body 60 is a basic structure of the joint structure 50. The concrete body 60 is formed of, for example, a thick rectangular body made of concrete, and is provided between the first existing wall 11 and the new pile 20. Specifically, as shown in FIG. 4, the concrete body 60 is provided in a portion other than between the first existing wall 11 and the new pile 20 in addition to the first existing wall 11. Here, regarding the concrete body 60 provided between the first existing wall 11 and the new pile 20, the portion of the first existing wall 11 above the lower protrusion 11a and the first of the new pile 20. The flange portion 21 is provided between the flange portion 21 and the portion above the lower protruding portion 11a of the first existing wall 11. It is also provided in a portion of the new pile 20 from the first flange portion 21 to the second flange portion 22. Further, the concrete body 60 provided in a portion other than between the first existing wall 11 and the new pile 20 is wider than the concrete body 60 provided between the first existing wall 11 and the new pile 20. (In FIG. 4, the outside in the front-rear direction) is provided. Further, the indoor end of the building 1 of the concrete body 60 provided in the portion other than the mutual intervals and the indoor end of the building 1 of the concrete body 60 provided between the mutuals are flush with each other. Moreover, the upper end portion of the concrete body 60 provided in the portion other than the above-mentioned mutual is provided so as to be flush with each other and the upper end portion of the concrete body 60 provided in the above-mentioned mutual.

The specific shape and size of the concrete body 60 are arbitrary, but in the embodiment, they are set as follows. That is, as shown in FIG. 3, the vertical cross-sectional shape of the concrete body 60 is set to be substantially rectangular. Further, the width (length in the front-rear direction) of the concrete body 60 is set to be substantially the same as the width of the first existing wall 11. Further, the depth of the concrete body 60 (the length in the left-right direction in FIG. 3) is set to be slightly larger (or substantially the same) than the total length of the depth of the first existing wall 11 and the depth of the new pile 20. ing. Further, the height of the concrete body 60 (length in the vertical direction in FIG. 3) is substantially the same as the height from the upper end of the lower protruding portion 11a of the first existing wall 11 to the upper end of the new pile 20 (in FIG. 3). Or it is set differently).

With such a configuration of the concrete body 60, the external force acting on either the first existing wall 11 or the new pile 20 is transmitted to either the first existing wall 11 or the new pile 20 via the concrete body 60. be able to.

(Structure-Joined structure-First connecting member)
The first connecting member 70 is for connecting the first existing wall 11 and the new pile 20. The first connecting member 70 is a long rod-shaped body, and a plurality of the first connecting members 70 are provided so as to be inserted through the concrete body 60. Specifically, as shown in FIG. 3, the longitudinal directions of the first connecting members 70 are arranged along the left-right direction, and they are arranged at intervals from each other (in FIGS. 3 and 4). Two in the front-back direction and four in the up-down direction). Then, the outdoor end of the building 1 of each first connecting member 70 is embedded in the first existing wall 11 (for example, embedded via a chemical anchor (not shown)), and the building of each first connecting member 70 is embedded. The indoor end of 1 is fixed by being inserted into an insertion hole (not shown) provided in the corresponding connection portion 24 of the new pile 20. In the embodiment, the first connecting member 70 is detached from the connecting portion 24 by attaching a dropout prevention portion 71 (for example, a nut or the like) to the indoor end portion of the building 1 of the first connecting member 70. It is preventing that.

Further, the specific configuration of the first connecting member 70 is arbitrary, but in the embodiment, it is configured by using a bolt member (for example, a steel full screw bolt or the like). As a result, the first connecting member 70 can be constructed at a relatively low cost, and the manufacturing cost of the joint structure 50 can be reduced.

With such a configuration of the first connecting member 70, the first connecting member 70 applies an external force acting on either the first existing wall 11 or the new pile 20 while connecting the first existing wall 11 and the new pile 20. It can be transmitted to either the first existing wall 11 or the new pile 20 via the above.

(Structure-Joined structure-Existing side second connecting member)
Returning to FIG. 3, the existing side second connecting member 80 is a second connecting member for connecting the first existing wall 11 and the concrete body 60. The existing side second connecting member 80 is a long rod-shaped body (however, a rod-shaped body shorter than the first connecting member 70), and a plurality of the existing side second connecting members 80 are provided so as to be inserted into the concrete body 60. Specifically, as shown in FIG. 3, the first existing wall 11 is provided so as to project from the upper end portion of the new pile 20 and the portion corresponding to the upper end portion thereof toward the indoor side of the building 1, and the existing side. The second connecting member 80 is fixed to the first existing wall 11 by being embedded (for example, embedded via a chemical anchor (not shown)) on the outdoor side of the building 1.

The specific configuration of the existing side second connecting member 80 is arbitrary, but in the embodiment, an anchor member (for example, a steel bar anchor) is used. As a result, the existing side second connecting member 80 can be constructed at a relatively low cost, and the manufacturing cost of the joint structure 50 can be reduced.

With such a configuration of the existing side second connecting member 80, an external force (particularly, a shearing force) acting on either the first existing wall 11 or the new pile 20 is first applied via the existing side second connecting member 80. It can be transmitted to either the existing wall 11 or the new pile 20. Further, for example, the number of the first connecting members 70 and the like can be reduced as compared with the case where the existing side second connecting member 80 is not provided, and it becomes easy to reduce the manufacturing cost of the joint structure 50.

(Structure-Joined structure-New side second connecting member)
The new side second connecting member 90 is a second connecting member for connecting the new pile 20 and the concrete body 60. The new side second connecting member 90 is a long rod-shaped body (however, a rod-shaped body shorter than the first connecting member 70), and a plurality of the second connecting members 90 are provided so as to be inserted into the concrete body 60. Specifically, as shown in FIG. 3, it is provided so as to project from the upper end of the new pile 20 and its vicinity toward the outdoor side of the building 1, and is fixed to the new pile 20 by welding or the like. There is.

The specific configuration of the second connecting member 90 on the new installation side is arbitrary, but in the embodiment, a stud member (for example, a steel stud gibber or the like) is used. As a result, the second connecting member 90 on the new construction side can be constructed at a relatively low cost, and the manufacturing cost of the joint structure 50 can be reduced.

With such a configuration of the new side second connecting member 90, an external force (particularly, a shearing force) acting on either the first existing wall 11 or the new pile 20 is first applied through the new side second connecting member 90. It can be transmitted to either the existing wall 11 or the new pile 20. Further, for example, the number of the first connecting members 70 and the like can be reduced as compared with the case where the second connecting member 90 on the new installation side is not provided, and it becomes easy to reduce the manufacturing cost of the joint structure 50.

(Structure-Joint structure-Other configurations)
The specific configuration of the joint structure 50 is arbitrary, but in the embodiment, the external force applied to either the first existing wall 11 or the new pile 20 is applied to the first existing wall 11 or the new pile 20. The following measures have been taken so that the pile 20 can be effectively transmitted to either one or the other.

（ここで、ｎ：既設側第２連結部材８０の必要本数
Ｑ：第１既設壁１１に作用するせん断耐力
Ｑａ：既設側第２連結部材８０における１本あたりのせん断耐力
Ｑａ_１：鋼材の耐力で決まる既設側第２連結部材８０における１本あたりのせん断耐力
Ｑａ_２：第１既設壁１１の支圧強度で決まる既設側第２連結部材８０における１本あたりのせん断耐力
ｓＡｅ：接続面における既設側第２連結部材８０の断面積
σ_ｙ：既設側第２連結部材８０の規格降伏点強度
Ｆ_ｃ：第１既設壁１１の圧縮強度
Ｅ_ｃ：第１既設壁１１のヤング係数
γ：コンクリートの単位体積重量） First, the number of existing second connecting members 80 installed is calculated using the following equations (1) to (5).

(Here, n: Required number of existing side second connecting members 80
Q: Shear strength acting on the first existing wall 11
Qa: Shear strength per piece in the existing side second connecting member 80
Qa ₁ : Shear strength per piece in the existing side second connecting member 80 determined by the yield strength of the steel material
Qa ₂ : Shear strength per existing side second connecting member 80 determined by the bearing strength of the first existing wall 11
sAe: Cross-sectional area of the existing side second connecting member 80 on the connecting surface
σ _y : Standard yield point strength of the existing side second connecting member 80
F _c: Compressive strength of the first existing wall 11
E _c: Young's modulus of the first existing wall 11
γ: Unit volume weight of concrete)

By setting the number of installed second connecting members 80 on the existing side using the following equations (1) to (5), for example, the first existing wall 11 or the new pile 20 is deformed. The shearing force acting on the wall 11 can be effectively transmitted to the new pile 20.

（ここで、ｎ：接合構造体５０の流動化処理土と新設杭２０を合成する場合に必要な新設側第２連結部材９０の本数
Ｑ´：新設杭２０における１本あたりに作用するせん断力
ｑ_ｓ１９：新設側第２連結部材９０のせん断耐力
ｐ_ｓ：接合構造体５０の流動化処理土と新設杭２０を合成する場合に必要な新設側第２連結部材９０の設置間隔
_ｓｃＡ：新設側第２連結部材９０の断面積
Ｌ：第１既設壁１１における下側突出部１１ａの上端から新設杭２０の上端部までの高さ） Next, the number of newly installed second connecting members 90 and the installation interval are calculated using the following equations (6) to (9).

(Here, n: Number of new side second connecting members 90 required when synthesizing fluidized soil of joint structure 50 and new pile 20
Q': Shear force acting on each new pile 20
q _s19 : Shear strength of the new second connecting member 90
_ps : Installation interval of the new side second connecting member 90 required when synthesizing the fluidized soil of the joint structure 50 and the new pile 20
_sc A: _Cross- sectional area of the second connecting member 90 on the new _installation side
L: Height from the upper end of the lower protrusion 11a on the first existing wall 11 to the upper end of the new pile 20)

By setting the number of installations and the installation interval of the new side second connecting member 90 by using the following equations (6) to (9), for example, with the deformation of the first existing wall 11 or the new pile 20. The shearing force acting on the new pile 20 can be effectively transmitted to the first existing wall 11.

（ここで、σ_ｃ：接合構造体５０に作用する圧縮応力度
Ｍ_ｍａｘ：接合構造体５０に作用する最大曲げモーメント
ｋ：係数
ｊ：圧縮側の躯体面から引張側の鉄筋外面までの長さ≒（断面長さ―被り厚さ）
ｂ：接合構造体５０の幅（単位幅）
ｄ：接合構造体５０の上端部から引張鉄筋までの距離
ｆ_ｃ：流動化処理土の許容圧縮応力度
ｐ：引張鉄筋比
Ａ_ｔ：第１連結部材７０の断面積） Next, the cross-sectional area of the first connecting member 70 is calculated using the following formulas (10) to (12).

(Here, σ _c : degree of compressive stress acting on the joint structure 50
M _max: Maximum bending moment acting on the joint structure 50
k: Coefficient
j: Length from the skeleton surface on the compression side to the outer surface of the reinforcing bar on the tension side ≒ (cross-sectional length-cover thickness)
b: Width (unit width) of the joint structure 50
d: Distance from the upper end of the joint structure 50 to the tensile reinforcing bar
f _c: allowable compressive stress of the flow of treated soil
p: Tensile rebar ratio
A _t: cross-sectional area of the first coupling member 70)

By setting the cross-sectional area of the first connecting member 70 using the following formulas (10) to (12), for example, when the first existing wall 11 is deformed toward the indoor side of the building 1, it is joined. The compressive force acting on the structure 50 can be effectively transmitted to the first existing wall 11 and the new pile 20.

Next, the cross-sectional area of the first connecting member 70 is further calculated using the following equations (13) and (14).
_{M max = A t × f t} × j = A t × f t × 7/8 × d ··· formula (13)
_{σ t = M max / (a} t × j) <f t ··· formula (14)
(Here, σ _t : degree of tensile stress acting on the joint structure 50
_ft : Allowable compressive stress of the first connecting member 70)

By setting the cross-sectional area of the first connecting member 70 using the following equations (13) and (14), for example, when the first existing wall 11 is deformed toward the indoor side of the building 1, it is joined. The tensile force acting on the structure 50 can be effectively transmitted to the first existing wall 11 and the new pile 20.

With the configuration of the joint structure 50 as described above, the first existing wall 11 and the new pile 20 can be joined via the joint structure 50, and the first existing wall 11 and the new pile 20 can be integrated. .. Further, the external force acting on either the first existing wall 11 or the new pile 20 can be transmitted to either the first existing wall 11 or the new pile 20 via the joint structure 50, and the prior art ( Compared with the technology of connecting the member for joining the existing skeleton and the new skeleton to the existing skeleton or the new skeleton with an adhesive), the force is transmitted between the first existing wall 11 and the new pile 20. It will be possible to do it reliably. Further, since the first existing wall 11 is an existing outer wall and the new pile 20 is a new mountain retaining pile, the mountain retaining wall can be formed by using the first existing wall 11 and the new pile 20. Therefore, by leaving the first existing wall 11, it is possible to reduce the labor of dismantling the first existing wall 11 and reduce the environmental load, and by integrating the first existing wall 11 and the new pile 20, the mountain retaining wall It is possible to increase the rigidity and contribute to the reduction of the number of cutting beam steps, so that the size of heavy machinery and the like used for dismantling the other first existing wall 11 can be increased and the number of heavy machinery and the like can be increased. It becomes easier to rationalize the dismantling of 11.

(How to join the first existing wall and new pile)
Subsequently, a method of joining the first existing wall 11 and the new pile 20 according to the embodiment will be described. This joining method includes an installation step, a first mounting step, a second mounting step, a third mounting step, and a forming step. In the following, the method of joining the first existing wall 11 and the new pile 20 shown in FIG. 3 will be described.

(1st method of joining existing wall and new pile-installation process)
First, the installation process will be described. The installation step is a step of installing the new pile 20 at a predetermined position (specifically, a position near the first existing wall 11).

Specifically, after transporting the new pile 20 to a predetermined position using a known crane or the like (not shown), a new pile 20 is newly installed in an excavation hole (not shown) formed in advance in a portion of the ground G corresponding to the predetermined position. A part of the pile 20 is embedded.

(Joining method between the first existing wall and the new pile-first mounting process)
Next, the first mounting process will be described. The first attachment step is a step of attaching the first connecting member 70 to the first existing wall 11 and the new pile 20.

Specifically, first, the outdoor end of the building 1 in each of the plurality of first connecting members 70 is embedded in an embedded hole (not shown) formed in advance in the first existing wall 11. Next, the indoor end of the building 1 in each of the plurality of first connecting members 70 is inserted into the insertion hole of the connecting portion 24 attached to the new pile 20. Then, the dropout prevention portion 71 is attached to the indoor end of the building 1 in each of the plurality of first connecting members 70.

(1st method of joining existing wall and new pile-2nd mounting process)
Next, the second mounting process will be described. The second mounting step is a step of mounting the new side second connecting member 90 to the new pile 20.

Specifically, after a plurality of new side second connecting members 90 are arranged at the outdoor side ends of the building 1 of the new pile 20, they are connected to the new pile 20 by welding or the like. However, the present invention is not limited to this, for example, after arranging a fixing plate (for example, a steel plate) (not shown) to which a plurality of second connecting members 90 on the new construction side are fixed at the outdoor end of the building 1 of the new pile 20, the new pile It may be connected to 20 by welding or the like. Alternatively, a plurality of new side second connecting members 90 may be connected to the new pile 20 by welding or the like before the installation process is performed.

(1st method of joining existing wall and new pile-3rd mounting process)
Next, the third mounting process will be described. The third mounting step is a step of mounting the existing side second connecting member 80 to the first existing wall 11.

Specifically, the outdoor side ends of the building 1 in each of the plurality of existing side second connecting members 80 are embedded in the embedded holes (not shown) formed in advance in the first existing wall 11. In this way, by performing the third mounting step after the first mounting step and the second mounting step, the new pile 20 can be reliably installed at a desired position, and it becomes easy to secure the installability of the new pile 20. .. However, the present invention is not limited to this, and for example, the third mounting step may be performed before the first mounting step or the second mounting step.

(Joining method between the first existing wall and the new pile-forming process)
Next, the forming process will be described. The forming step is a step of forming the concrete body 60.

Specifically, first, a formwork is installed around the area where the concrete body 60 is installed. Next, concrete is poured into the formwork and placed. Then, after the cast concrete is solidified for a predetermined period, the formwork is removed.

By the joining method as described above, the first existing wall 11 and the new pile 20 can be joined via the joining structure 50, and the first existing wall 11 and the new pile 20 can be integrated.

(Effect of embodiment)
As described above, according to the embodiment, the concrete body 60 provided between the first existing wall 11 and the new pile 20 and the first connecting member 70 inserted through the concrete body 60 are the first existing piles. Since the first connecting member 70 for connecting the wall 11 and the new pile 20 is provided, the first existing wall 11 and the new pile 20 can be joined via the joining structure 50, and the first existing wall 11 can be joined. And the new pile 20 can be integrated. Further, the external force acting on either the first existing wall 11 or the new pile 20 can be transmitted to either the first existing wall 11 or the new pile 20 via the joint structure 50, and the prior art ( Compared with the technology of connecting the member for joining the existing skeleton and the new skeleton to the existing skeleton or the new skeleton with an adhesive), the force is transmitted between the first existing wall 11 and the new pile 20. It will be possible to do it reliably. Further, since a structure (for example, a mountain retaining wall) can be formed using the first existing wall 11 and the new pile 20, the labor of dismantling the first existing wall 11 can be reduced by leaving the first existing wall 11. In addition, the environmental load can be reduced, and the rigidity of the structure can be increased by integrating the first existing wall 11 and the new pile 20, and the number of girder steps can be reduced. Therefore, it is possible to increase the size of the heavy machinery and the like used for dismantling the other first existing wall 11 and increase the number of heavy machinery and the like, and it becomes easy to rationalize the dismantling of the first existing wall 11.

Further, since it is provided with a second connecting member (existing side second connecting member 80 and new side second connecting member 90) for connecting at least one of the first existing wall 11 or the new pile 20 and the concrete body 60. , The external force (particularly, shearing force) acting on either one of the first existing wall 11 or the new pile 20 can be transmitted to either the first existing wall 11 or the new pile 20 via the second connecting member. it can. Further, for example, the number of the first connecting members 70 and the like can be reduced as compared with the case where the second connecting member is not provided, and the manufacturing cost of the joint structure 50 can be easily reduced.

Further, since the first connecting member 70 is a bolt member, the existing side second connecting member 80 is an anchor member, and the new side second connecting member 90 is a stud member, the first connecting member 70 is already installed. The side second connecting member 80 and the newly installed side second connecting member 90 can be constructed at a relatively low cost, and the manufacturing cost of the joined structure 50 can be reduced.

Further, since the first existing wall 11 is an existing outer wall and the new pile 20 is a new mountain retaining pile, the existing outer wall and the newly installed mountain retaining pile can be used to form the mountain retaining wall. Therefore, by leaving the existing outer wall, the labor of dismantling the existing outer wall can be reduced and the environmental load can be reduced, and the rigidity of the mountain retaining wall can be increased by integrating the existing outer wall and the newly installed mountain retaining pile. In addition, it can contribute to the reduction of the number of girder steps, so that the size of heavy machinery used for dismantling other existing outer walls can be increased and the number of heavy machinery can be increased, making it easier to rationalize the dismantling of existing outer walls. Become.

[III] Modifications to Embodiments The embodiments of the present invention have been described above, but the specific configurations and means of the present invention are within the scope of the technical idea of each invention described in the claims. , Can be modified and improved arbitrarily. Hereinafter, such a modification will be described.

(About the problem to be solved and the effect of the invention)
First, the problem to be solved by the invention and the effect of the invention are not limited to the above-mentioned contents, and the present invention solves a problem not described above or an effect not described above. It can also be played, and may solve only some of the tasks described or play only some of the effects described.

(About shape, numerical value, structure, time series)
With respect to the components illustrated in the embodiments and drawings, the shapes, numerical values, or the interrelationships of the structures or time series of the plurality of components shall be arbitrarily modified and improved within the scope of the technical idea of the present invention. Can be done.

(About the existing skeleton)
In the above embodiment, it has been described that the existing skeleton to be joined to the joint structure 50 is the first existing wall 11 (existing outer wall), but the present invention is not limited to this, and for example, other than the first existing wall 11 (For example, existing inner walls, columns, beams, floors, etc.) may be used.

Further, in the above embodiment, it has been described that the first existing wall 11 is formed of a rectangular body having an L-shaped vertical cross-sectional shape, but the present invention is not limited to this, and for example, a substantially flat rectangular shape is used. It may be formed on the body. In this case, a joint structure 50 is provided between the first existing wall 11 and the new pile 20.

(About the new skeleton)
In the above embodiment, it has been described that the new skeleton to be joined to the joint structure 50 is the new pile 20 (new Yamadome pile), but the present invention is not limited to this, and for example, a skeleton other than the new pile 20 is used. (As an example, a new wall, pillar, beam, floor, etc.) may be used.

(About new piles)
In the above embodiment, it has been described that the connecting portion 24 is attached to the new pile 20, but the present invention is not limited to this, and for example, the connecting portion 24 may be omitted. In this case, the first connecting member 70 may be directly connected to the new pile 20 by welding, a fixture, or the like.

(About the joint structure)
In the above embodiment, it has been described that the joint structure 50 includes the existing side second connecting member 80 and the new side second connecting member 90, but the present invention is not limited to this, and for example, the existing side second connecting member 80 is provided. Alternatively, at least one of the new side second connecting members 90 may be omitted. In this case, in the method of joining the first existing wall 11 and the new pile 20, the second mounting step or the third mounting step can be omitted.

(About concrete body)
In the above embodiment, it has been described that the concrete body 60 is provided in a portion other than between the first existing wall 11 and the new pile 20 in addition to the mutual space, but the present invention is not limited to this, for example. , The first existing wall 11 and the new pile 20 may be provided only between each other.

(About the first connecting member and the second connecting member)
In the above embodiment, it has been described that the first connecting member 70 is a bolt member, but the present invention is not limited to this, and for example, other members other than the bolt member (for example, a reinforcing bar, an anchor member, etc.) may be used. Good. Further, in the above embodiment, it has been described that the existing side second connecting member 80 is an anchor member, but the present invention is not limited to this, and for example, a member other than the anchor member (for example, a bolt member) may be used. Good. Further, in the above embodiment, it has been described that the second connecting member 90 on the new installation side is a stud member, but the present invention is not limited to this, and for example, a member other than the stud member (for example, a bolt member) may be used. Good.

Further, in the above-described embodiment, it has been explained that the first connecting member 70 is provided with the fall-off prevention unit 71, but the present invention is not limited to this, and for example, the fall-off prevention unit 71 may be omitted.

(Additional note)
The joint structure of Appendix 1 is a joint structure for joining an existing skeleton and a new skeleton formed separately from the existing skeleton, and is between the existing skeleton and the new skeleton. A concrete body to be provided and a first connecting member inserted through the concrete body and for connecting the existing skeleton and the new skeleton are provided.

The joint structure of Appendix 2 includes a second connecting member for connecting at least one of the existing skeleton or the new skeleton to the concrete body in the joint structure described in Appendix 1.

The joint structure of Appendix 3 is the joint structure according to Appendix 2, wherein the first connecting member is a bolt member, and the second connecting member is a stud member or an anchor member.

The joint structure of Appendix 4 is the joint structure according to any one of Appendix 1 to 3, wherein the existing skeleton is an existing outer wall, and the new skeleton is a newly installed mountain pile.

(Effect of appendix)
According to the joint structure described in Appendix 1, the concrete body provided between the existing skeleton and the new skeleton and the first connecting member inserted into the concrete body, connecting the existing skeleton and the new skeleton. Since the first connecting member for the purpose is provided, the existing skeleton and the new skeleton can be joined via the joining structure, and the existing skeleton and the new skeleton can be integrated. Further, the external force acting on either the existing skeleton or the new skeleton can be transmitted to either the existing skeleton or the new skeleton via the joint structure, and the conventional technique (joining the existing skeleton and the new skeleton). Compared with the technique of connecting the members for the purpose to the existing skeleton or the new skeleton with an adhesive), it is possible to reliably transmit the force between the existing skeleton and the new skeleton. In addition, since a structure using an existing skeleton and a new skeleton (for example, a mountain retaining wall) can be formed, by leaving the existing skeleton, the labor of dismantling the existing skeleton can be reduced, the environmental load can be reduced, and the existing skeleton can be formed. By integrating the skeleton and the newly installed skeleton, the rigidity of the structure can be increased and the number of beam steps can be reduced. Therefore, it is possible to increase the size of heavy machinery and the like used for dismantling other existing skeletons and increase the number of heavy machinery and the like, and it becomes easy to rationalize the dismantling of the existing skeleton.

According to the joint structure described in Appendix 2, since the second connecting member for connecting at least one of the existing skeleton or the new skeleton and the concrete body is provided, it acts on either the existing skeleton or the new skeleton. The generated external force (particularly, shearing force) can be transmitted to either the existing skeleton or the new skeleton via the second connecting member. Further, for example, the number of the first connecting members and the like can be reduced as compared with the case where the second connecting member is not provided, and it becomes easy to reduce the manufacturing cost of the joined structure.

According to the joint structure described in Appendix 3, since the first connecting member is a bolt member and the second connecting member is a stud member or an anchor member, the first connecting member and the second connecting member are relatively used. It can be constructed at low cost, and the manufacturing cost of the bonded structure can be reduced.

According to the joint structure described in Appendix 4, the existing skeleton is the existing outer wall and the new skeleton is the new mountain retaining pile. Therefore, the existing outer wall and the new mountain retaining pile are used to form the mountain retaining wall. Can be formed. Therefore, by leaving the existing outer wall, the labor of dismantling the existing outer wall can be reduced and the environmental load can be reduced, and the rigidity of the mountain retaining wall can be increased by integrating the existing outer wall and the newly installed mountain retaining pile. In addition, it can contribute to the reduction of the number of girder steps, so that the size of heavy machinery used for dismantling other existing outer walls can be increased and the number of heavy machinery can be increased, making it easier to rationalize the dismantling of existing outer walls. Become.

1 Building 10 Wall 11 1st existing wall 11a Lower protrusion 12 2nd existing wall 13 New wall 20 New pile 21 1st flange part 22 2nd flange part 23 Web part 24 Connection part 50 Joint structure 60 Concrete body 70th 1 Connecting member 71 Falling prevention part 80 Existing side second connecting member 90 Newly installed side second connecting member G Ground

Claims (4)

It is a joining structure for joining an existing skeleton and a new skeleton formed separately from the existing skeleton.
A concrete body provided between the existing skeleton and the new skeleton, and
A first connecting member inserted through the concrete body, which is a first connecting member for connecting the existing skeleton and the new skeleton.
Joined structure with. A second connecting member for connecting at least one of the existing skeleton or the newly installed skeleton to the concrete body is provided.
The joint structure according to claim 1. The first connecting member is a bolt member.
The second connecting member is a stud member or an anchor member.
The joint structure according to claim 2. The existing skeleton is an existing outer wall.
The new skeleton is a new Yamadome pile.
The joint structure according to any one of claims 1 to 3.

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