JP7274332B2 - junction structure - Google Patents

Description

The present invention relates to a bonded structure.

Conventionally, as one of the technologies to join the existing frame and the new frame, steel materials are attached to the surface of the existing frame with an adhesive, and anchors are embedded in the new frame by protruding from the surface of the steel. , and angle members attached to the joints between the existing frame and the new frame with an adhesive.

JP 2008-208643 A

However, in the above conventional structure, the steel material is attached to the surface of the existing frame with an adhesive, and the angle material is attached to the joint between the existing frame and the new frame with an adhesive. For example, when an external force is applied to either the existing frame or the new frame, depending on the adhesion state of the adhesive applied to the steel material or the angle material, the external force may be applied to either the existing frame or the new frame. Therefore, there is room for improvement from the viewpoint of ensuring the mutual transmission of force between the existing frame and the new frame.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a joint structure capable of reliably transmitting force between an existing skeleton and a new skeleton. .

In order to solve the above-described 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 through the concrete body, for connecting the existing skeleton and the new skeleton. and a first connecting member , wherein the existing skeleton is an existing outer wall, and the new skeleton is a newly installed earth retaining pile.

The joint structure according to claim 2 is the joint structure according to claim 1, further comprising a second connecting member for connecting at least one of the existing skeleton or the new skeleton and the concrete body. .

A 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.

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 connected. and the first connecting member for connecting, the existing skeleton and the new skeleton can be joined via the joint 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 the other of the existing skeleton or the new skeleton via the joint structure, and the conventional technology (joining the existing skeleton and the new skeleton In comparison with the technique of connecting the members to the existing frame or the new frame with an adhesive agent), it is possible to reliably transmit force between the existing frame and the new frame. In addition, since a structure (for example, retaining wall) can be formed using the existing frame and the new frame, leaving the existing frame can reduce the labor of dismantling the existing frame, reduce the environmental load, and reduce the environmental load. The integration of the skeleton and the new skeleton can increase the rigidity of the structure and contribute to the reduction of the number of strut steps. Therefore, it is possible to increase the size of the heavy machinery used for dismantling other existing skeletons, or to increase the number of heavy machinery, etc., making it easier to rationalize the dismantling of the existing skeletons.
In addition, since the existing frame is the existing outer wall and the new frame is the newly installed earth retaining pile, the existing external wall and the newly installed earth retaining pile can be used to form the earth 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. In addition, it can contribute to a reduction in the number of steps of struts. Therefore, it is possible to increase the size of heavy machinery, etc. used for dismantling other existing exterior walls, or to increase the number of heavy machinery, etc., making it easy to rationalize the demolition of existing exterior walls. Become.

According to the joint structure described in claim 2, since the second connecting member is provided for connecting at least one of the existing skeleton or the new skeleton and the concrete body, either the existing skeleton or the new skeleton The applied external force (in particular, shear force) can be transmitted to either the existing skeleton or the new skeleton via the second connecting member. In addition, the number of the first connecting members can be reduced compared to the case where the second connecting member is not provided, and the manufacturing cost of the joined structure can be easily reduced.

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

It is a top view which shows notionally the basement floor of the building which concerns on embodiment of this invention (partial illustration abbreviation). FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 (partially omitted). 3 is an enlarged view of a peripheral area of the bonded structure of FIG. 2; FIG. 4 is a plan view of FIG. 3 (partially omitted); FIG. 4 is a side view of FIG. 3 (partially omitted); FIG.

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

[I] Basic concept of the embodiment First, the basic concept of the embodiment will be described. Embodiments generally relate to a joint structure for joining an existing skeleton and a new skeleton formed separately from the existing skeleton. Here, a “building” comprising an “existing frame” and a “new frame” is a building with one or more floors, which was partly newly constructed after part of the existing building was demolished. be. This "building" is a concept including, for example, collective housing such as apartments and condominiums, office buildings, commercial facilities, public facilities, and factory facilities. , is explained as an office building in the middle of construction of the basement floor. In addition, the "existing frame" means the frame that remains after the dismantling of the existing building, among the frames that make up the building (e.g., columns, beams, walls, floors, etc.). In this case, the existing outer wall and inner wall located near the new frame will be explained. In addition, the “new framework” means a newly constructed framework (that is, a framework formed separately from the existing framework) among the frameworks that make up the above-mentioned building. Described as a pile or an inner wall.

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

(composition)
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 explained. FIG. 1 is a plan view conceptually showing a basement floor of a building 1 according to an embodiment of the present invention (partially omitted). 2 is a cross-sectional view taken along the line AA in FIG. 1. FIG. In the following description, the X direction in FIG. The direction is the front direction of building 1, the -Y direction is the rear direction of building 1), the Z direction in FIG. called.

The building 1 is, for example, a building made of reinforced concrete, and is provided on a predetermined site. As shown in FIGS. A wall 10 and a new pile 20 are provided.

(Construction-Building-Floors, Beams, Columns)
The floors constitute the floors of the building 1, and are arranged side by side in the vertical direction at intervals. Also, the pillars support the floors, and are provided in plurality between the floors (that is, the spaces of each floor of the building 1). Also, the beams support the floors, and are provided in plurality so as to abut on the lower surface of each floor.

(Composition - Wall)
Returning to FIG. 1, the wall 10 is for partitioning between the floors, and a plurality of walls 10 are provided between the floors. 1 and 2, the wall 10 includes a first existing wall 11, a second existing wall 12, and a new wall 13. As shown in FIGS. Each of the "first existing wall 11" and "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. handle.

(Composition - Wall - First existing wall, second existing wall, new wall)
The first existing wall 11 is configured using an existing outer wall (for example, an outer wall made of concrete) in the embodiment, and as shown in FIG. there is In addition, the second existing wall 12 is configured using an existing inner wall (for example, an inner wall made of concrete) in the embodiment, and as shown in FIG. 11 are provided on the indoor side of the building 1 . In addition, the new wall 13 is configured using a newly installed inner wall (for example, an inner wall made of concrete) in the embodiment, and as shown in FIG. is provided.

Here, the specific configuration of the first existing wall 11 is arbitrary, but in the embodiment, as shown in FIG. It is arranged so that the L-shaped horizontal bar portion protrudes toward the indoor side of the building 1. - 特許庁In addition, below, the L-shaped horizontal bar part 11a of the 1st existing wall 11 is called the "lower side protrusion part 11a."

The reason why the first existing wall 11 and the second existing wall 12 were left without being removed when the building 1 was demolished is as follows. That is, first, when the first existing wall 11 and the second existing wall 12 are dismantled and the backfilling material is installed, the cost for dismantling and removing the first existing wall 11 and the second existing wall 12 and the refilling material , the installation cost of the building 1 may be increased. In addition, there is a risk of disaster such as collapse of the ground G when carrying out dismantling work and carry-out work of the first existing wall 11 and the like, or carry-in work and installation work of the backfilling material. In view of the above, in order to avoid these problems from occurring, 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 constructed using a newly installed earth retaining pile (for example, steel core material for earth retaining pile), and as shown in FIGS. A plurality of them are provided in the vicinity of the first existing wall 11 on the floor.

Moreover, although it is arbitrary about the specific structure of the new pile 20, it becomes as follows in embodiment.

That is, the new pile 20 is formed of a long H-shaped steel, and specifically, as shown in FIG. 1 and a web portion 23 connecting the first flange portion 21 and the second flange portion 22 . 2, the new pile 20 is installed such that the longitudinal direction of the new pile 20 extends along the vertical direction, and the upper end portion of the new pile 20 and its vicinity are located below the first existing wall 11. It is installed so as to be positioned above the side projecting portion 11a.

A connection portion 24 is provided at the end portion of the second flange portion 22 of the new pile 20 on the indoor side of the building 1 . The connecting portion 24 is connecting means for connecting a first connecting member 70 to be described later to the new pile 20 . The connecting portion 24 is made of, for example, an elongated steel plate (for example, an angle material) or the like, and as shown in FIG. A plurality of them are vertically arranged side by side at intervals (in FIG. 5, which will be described later, four are arranged side by side). Then, they are connected to the second flange portion 22 by welding or the like.

(Construction-joint structure)
Next, the configuration of the joint structure 50 will be described. FIG. 3 is an enlarged view of the peripheral area of the joint structure 50 of FIG. FIG. 4 is a plan view of FIG. 3 (partially omitted). FIG. 5 is a side view of FIG. 3 (partially omitted). 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 includes a concrete body 60, a first connecting member 70, an existing second A connection member 80 and a newly installed side second connection member 90 are provided.

(Construction-joint structure-concrete body)
The concrete body 60 is the 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, in addition to the first existing wall 11 and the new piles 20, the concrete body 60 is provided in a portion other than the inter-between. 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 protruding portion 11a and the first wall of the new pile 20 It is provided between the flange portion 21 and the portion above the lower projecting portion 11 a of the first existing wall 11 . Moreover, it is also provided in a portion from the first flange portion 21 to the second flange portion 22 of the new pile 20 . In addition, the concrete body 60 provided in the 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 the width direction. (outside in the front-rear direction in FIG. 4). Furthermore, the indoor-side end of the building 1 of the concrete body 60 provided in the portion other than the above-mentioned mutual and the indoor-side end of the building 1 of the concrete body 60 provided between the above-mentioned are flush with each other, In addition, the upper end portion of the concrete body 60 provided in the portion other than the above-mentioned mutual portion and the upper end portion of the concrete member 60 provided between the above-mentioned mutual portions are provided so as to be flush with each other.

Moreover, although the specific shape and size of the concrete body 60 are arbitrary, they are set as follows in the embodiment. 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 (the length in the front-rear direction) of the concrete body 60 is set substantially equal to the width of the first existing wall 11 . The depth of the concrete body 60 (the length in the left-right direction in FIG. 3) is set slightly larger (or substantially the same) as the total length of the depth of the first existing wall 11 and the depth of the new pile 20. ing. In addition, 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 projecting portion 11a of the first existing wall 11 to the upper end of the new pile 20 ( or differently).

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

(Construction-joint 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 first connecting members 70 are arranged so that the longitudinal direction of each first connecting member 70 extends along the left-right direction, and are spaced apart from each other (in FIGS. 3 and 4, 2 each in the front and rear direction, and 4 each in the vertical direction). Then, the end portion of each first connecting member 70 on the outdoor side of the building 1 is embedded in the first existing wall 11 (for example, embedded via a chemical anchor or the like (not shown)), and the building of each first connecting member 70 is embedded. 1 is fixed by being inserted through 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 falls off from the connecting portion 24 by attaching a drop-off prevention portion 71 (for example, a nut or the like) to the end portion of the first connecting member 70 on the indoor side of the building 1. prevent this from happening.

Moreover, although the specific configuration of the first connecting member 70 is arbitrary, in the embodiment, it is configured using a bolt member (for example, a fully threaded steel bolt or the like). Accordingly, the first connecting member 70 can be configured 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 external force acting on either the first existing wall 11 or the new pile 20 is applied to the first connecting member 70 while connecting the first existing wall 11 and the new pile 20. can be transmitted to either the first existing wall 11 or the new pile 20 via the .

(Construction-joint 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, the rod-shaped body is 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, it is provided so as to protrude toward the indoor side of the building 1 from the portion corresponding to the upper end portion of the new pile 20 and the vicinity thereof in the first existing wall 11, and the existing side The second connecting member 80 is fixed to the first existing wall 11 by embedding the end portion of the second connecting member 80 on the outdoor side of the building 1 (for example, embedding via a chemical anchor or the like (not shown)).

Moreover, although the specific configuration of the existing-side second connecting member 80 is arbitrary, in the embodiment, it is configured using an anchor member (for example, a steel insert anchor or the like). As a result, the existing-side second connecting member 80 can be configured 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 , the external force (especially shear force) acting on either the first existing wall 11 or the new pile 20 is transferred to the first connecting member 80 via the existing-side second connecting member 80 . It can be transmitted to either the existing wall 11 or the new pile 20 . In addition, for example, the number of the first connecting members 70 can be reduced compared to the case where the existing side second connecting member 80 is not provided, and the manufacturing cost of the joint structure 50 can be easily reduced.

(Construction-joint structure-newly installed side second connecting member)
The newly installed side second connecting member 90 is a second connecting member for connecting the newly installed pile 20 and the concrete body 60 . The newly installed side second connecting member 90 is a long rod-shaped body (however, a rod-shaped body shorter than the first connecting member 70 ), and is provided in plurality so as to be inserted into the concrete body 60 . Specifically, as shown in FIG. 3, it is provided so as to protrude from the upper end of the new pile 20 and the vicinity thereof toward the outside of the building 1, and is fixed to the new pile 20 by welding or the like. there is

Moreover, although the specific configuration of the newly installed side second connecting member 90 is arbitrary, in the embodiment, it is configured using a stud member (for example, a steel stud dowel or the like). Thereby, the newly installed side second connecting member 90 can be configured at a relatively low cost, and the manufacturing cost of the joint structure 50 can be reduced.

With such a configuration of the newly installed side second connecting member 90 , the external force (especially shear force) acting on either the first existing wall 11 or the newly installed pile 20 is transferred to the first through the newly installed side second connecting member 90 . It can be transmitted to either the existing wall 11 or the new pile 20 . In addition, for example, the number of first connecting members 70 can be reduced compared to the case where the newly installed side second connecting member 90 is not provided, and the manufacturing cost of the joint structure 50 can be easily reduced.

(Construction - Joined structure - Other construction)
Further, although the specific configuration of this joint structure 50 is arbitrary, in the embodiment, an 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 . In order to effectively transmit to one of the piles 20, the following measures are taken.

（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 installed number of the existing side second connecting members 80 is calculated using the following formulas (1) to (5).

(Here, n: the required number of existing side second connecting members 80
Q: Shear strength acting on the first existing wall 11
Qa: Shear strength per existing side second connecting member 80
Qa ₁ : Shear strength per one existing side second connecting member 80 determined by the strength of the steel material
Qa ₂ : Shear strength per one existing side second connecting member 80 determined by the bearing pressure 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 weight of concrete)

By setting the installation number of the existing side second connecting members 80 using the following formulas (1) to (5), for example, the first existing wall 11 or the newly installed pile 20 is deformed. It becomes possible to effectively transmit the shearing force acting on the wall 11 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 installation number and the installation interval of the newly installed side second connecting members 90 are calculated using the following equations (6) to (9).

(Here, n: the number of newly installed side second connecting members 90 required when combining the fluidized soil of the joint structure 50 and the newly installed pile 20
Q′: Shear force acting on each newly installed pile 20
q _s19 : Shear strength of the newly installed side second connecting member 90
p _s : Installation interval of the newly installed side second connecting member 90 required when combining the fluidized soil of the joint structure 50 and the newly installed pile 20
_sc A: Cross-sectional area of the newly installed side second connecting member 90
L: Height from the upper end of the lower projecting portion 11a of the first existing wall 11 to the upper end of the new pile 20)

By setting the installation number and the installation interval of the newly installed side second connecting members 90 using the following equations (6) to (9), for example, with the deformation of the first existing wall 11 or the newly installed pile 20 It becomes possible to effectively transmit the shearing force acting on the new pile 20 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 frame surface on the compression side to the outer surface of the reinforcing bar on the tension side ≒ (section length - covering thickness)
b: Width (unit width) of the joint structure 50
d: distance from the upper end of the joint structure 50 to the tension reinforcing bar
f _c : Permissible compressive stress of fluidized soil
p: Tensile rebar ratio
A _t : cross-sectional area of the first connecting 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 can be joined. It becomes possible to effectively transmit the compressive force acting on the structure 50 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 formulas (13) and (14).
M _max =A _t ×f _t ×j=A _t ×f _t ×7/8×d Expression (13)
σ _t =M _max /(a _t ×j)<f _t Expression (14)
(Here, σ _t : Degree of tensile stress acting on the joint structure 50
f _t : allowable compressive stress of the first connecting member 70)

By setting the cross-sectional area of the first connecting member 70 using the following formulas (13) and (14), for example, when the first existing wall 11 is deformed toward the indoor side of the building 1, it can be joined. It becomes possible to effectively transmit the tensile force acting on the structure 50 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 through the joint structure 50, and the first existing wall 11 and the new pile 20 can be integrated. . In addition, the external force acting on either the first existing wall 11 or the new pile 20 can be transmitted to the other of the first existing wall 11 or the new pile 20 via the joint structure 50. In comparison with the technique of connecting a member for joining the existing skeleton and the new skeleton to the existing skeleton or the new skeleton with an adhesive, force transmission between the first existing wall 11 and the new pile 20 is reduced. It can be done with certainty. Further, since the first existing wall 11 is an existing outer wall and the new pile 20 is a newly installed earth retaining pile, the first existing wall 11 and the new pile 20 can be used to form an earth retaining wall. 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. It is possible to increase the rigidity and contribute to the reduction of the number of steps of struts. It will be easier to rationalize the dismantling of 11.

(Method of joining first existing wall and new pile)
Next, a method for joining the first existing wall 11 and the new pile 20 according to the embodiment will be described. The joining method includes a setting step, a first attaching step, a second attaching step, a third attaching step, and a forming step. In addition, below, it demonstrates paying attention to the joining method of the 1st existing wall 11 and the new pile 20 which are shown in FIG.

(Method of joining first 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 the new pile 20 is transported to a predetermined position using a known crane or the like (not shown), the new pile 20 is newly installed in an excavation hole (not shown) previously formed in a portion of the ground G corresponding to the predetermined position. A part of the stake 20 is embedded.

(Method of joining first existing wall and new pile - first installation 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 ends of the plurality of first connecting members 70 on the outdoor side of the building 1 are embedded in embedding holes (not shown) previously formed in the first existing wall 11 . Next, the end portion of each of the plurality of first connecting members 70 on the indoor side of the building 1 is inserted through the insertion hole of the connection portion 24 attached to the new pile 20 . Then, the drop-off preventing portions 71 are attached to the ends of the plurality of first connecting members 70 on the indoor side of the building 1 .

(Method of joining the first existing wall and the new pile - second installation process)
Next, the second mounting process will be described. The second attachment step is a step of attaching the newly installed side second connecting member 90 to the newly installed pile 20 .

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

(Method of joining first existing wall and new pile - third installation process)
Next, the 3rd attachment process is demonstrated. The third attachment step is a step of attaching the existing-side second connecting member 80 to the first existing wall 11 .

Specifically, the ends of the plurality of existing-side second connecting members 80 on the outdoor side of the building 1 are respectively embedded in embedding holes (not shown) previously formed in the first existing wall 11 . In this way, by performing the third mounting process after the first mounting process and the second mounting process, the new pile 20 can be reliably installed at the desired position, and the installability of the new pile 20 can be easily secured. . However, not limited to this, for example, the third attachment process may be performed before the first attachment process or the second attachment process.

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

Specifically, first, a formwork is installed around where the concrete body 60 is to be installed. Next, the concrete is poured into the formwork and poured. After the placed 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 through the joined structure 50, and the first existing wall 11 and the new pile 20 can be integrated.

(Effect of Embodiment)
Thus, 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, the first existing 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 joint structure 50, and the first existing wall 11 and the new pile 20 can be integrated. In addition, the external force acting on either the first existing wall 11 or the new pile 20 can be transmitted to the other of the first existing wall 11 or the new pile 20 via the joint structure 50. In comparison with the technique of connecting a member for joining the existing frame and the new frame to the existing frame or the new frame with an adhesive, force transmission between the first existing wall 11 and the new pile 20 is reduced. It can be done with certainty. In addition, since a structure (for example, a retaining wall or the like) can be formed using the first existing wall 11 and the new piles 20, leaving the first existing wall 11 in place can reduce the labor required to dismantle 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 steps of struts can be reduced. Therefore, it is possible to increase the size of the heavy machinery used for demolishing the other first existing wall 11 or to increase the number of heavy machinery, etc., which makes it easier to rationalize the demolishing of the first existing wall 11 .

Moreover, since the second connecting member (the existing side second connecting member 80 and the newly installed side second connecting member 90) is provided for connecting at least one of the first existing wall 11 or the new pile 20 and the concrete body 60, , the external force (in particular, shear force) acting on either the first existing wall 11 or the new pile 20 can be transmitted to the other of the first existing wall 11 or the new pile 20 via the second connecting member. can. In addition, for example, the number of the first connecting members 70 can be reduced compared to 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 second connecting member 80 is an anchor member, and the newly installed second connecting member 90 is a stud member, the first connecting member 70 and the existing The side second connecting member 80 and the newly installed side second connecting member 90 can be configured at relatively low cost, and the manufacturing cost of the joint structure 50 can be reduced.

Further, since the first existing wall 11 is the existing outer wall and the new pile 20 is the newly installed earth retaining pile, the existing outer wall and the newly installed earth retaining pile can be used to form the earth 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. In addition, it can contribute to a reduction in the number of steps of struts. Therefore, it is possible to increase the size of heavy machinery, etc. used for dismantling other existing exterior walls, or to increase the number of heavy machinery, etc., making it easy to rationalize the demolition of existing exterior walls. Become.

[III] Modifications to the Embodiments Although the embodiments of the present invention have been described above, specific configurations and means of the present invention are within the scope of the technical ideas of each invention described in the claims. , can be arbitrarily modified and improved. Such modifications will be described below.

(Problem to be solved and effect of invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves problems not described above or achieves effects not described above. and may solve only part of the problems described or provide only part of the advantages described.

(Regarding shapes, numbers, structures, and time series)
With respect to the components illustrated in the embodiments and drawings, the shape, numerical value, structure of multiple components, or time-series interrelationships may be arbitrarily modified and improved within the scope of the technical idea of the present invention. can be done.

(About the existing framework)
In the above-described embodiment, the existing skeleton that is joined to the joint structure 50 is the first existing wall 11 (existing outer wall). (existing inner walls, pillars, beams, floors, etc.).

Further, in the above-described embodiment, the first existing wall 11 has been described as being formed in a rectangular body having an L-shaped vertical cross-section, but is not limited to this, for example, a substantially flat rectangular shape. It may be formed in 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 framework)
In the above-described embodiment, the new skeleton to be joined to the joint structure 50 is the new pile 20 (new earth retaining pile). (For example, it may be newly installed walls, columns, beams, floors, etc.).

(Regarding new piles)
In the above-described embodiment, the connecting portion 24 is attached to the new pile 20, but the present invention is not limited to this, and the connecting portion 24 may be omitted, for example. In this case, the first connecting member 70 may be directly connected to the new pile 20 by welding or fixtures.

(Regarding the junction structure)
In the above-described embodiment, the joint structure 50 includes the existing-side second connection member 80 and the new-installation-side second connection member 90 . Alternatively, at least one of the newly installed side second connecting members 90 may be omitted. In this case, in the joining method of the first existing wall 11 and the new pile 20, the second attachment step or the third attachment step can be omitted.

(About concrete body)
In the above-described embodiment, the concrete body 60 is provided not only between the first existing wall 11 and the new pile 20, but also in a portion other than the mutual space. , may be provided only between the first existing wall 11 and the new pile 20 .

(Regarding the first connecting member and the second connecting member)
In the above embodiment, the first connecting member 70 is described as being a bolt member, but is not limited to this. good. Further, in the above-described embodiment, the existing-side second connecting member 80 is described as an anchor member, but the present invention is not limited to this. good. Further, in the above-described embodiment, the installation-side second connecting member 90 is described as being a stud member. good.

Further, in the above-described embodiment, it is explained that the first connecting member 70 is provided with the drop-off preventing portion 71, but the drop-off preventing portion 71 may be omitted, for example.

(Appendix)
The joint structure of Supplementary Note 1 is a joint structure for joining an existing skeleton and a new skeleton formed separately from the existing skeleton, wherein the joint structure between the existing skeleton and the new skeleton and a first connecting member inserted through the concrete body to connect the existing skeleton and the new skeleton.

The joint structure according to Appendix 2 is the joint structure according to Appendix 1, further comprising a second connecting member for connecting at least one of the existing skeleton or the new skeleton and the concrete body.

The joint structure according to 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 Appendixes 1 to 3, wherein the existing skeleton is an existing outer wall, and the new skeleton is a newly installed earth retaining pile.

(Effect of Supplementary Note)
According to the joint structure described in Supplementary Note 1, the concrete body provided between the existing skeleton and the new skeleton and the first connecting member inserted through the concrete body connect the existing skeleton and the new skeleton. and the first connecting member for connecting, the existing skeleton and the new skeleton can be joined via the joint 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 the other of the existing skeleton or the new skeleton via the joint structure, and the conventional technology (joining the existing skeleton and the new skeleton In comparison with the technique of connecting the members to the existing frame or the new frame with an adhesive agent), it is possible to reliably transmit force between the existing frame and the new frame. In addition, since a structure (for example, retaining wall) can be formed using the existing frame and the new frame, leaving the existing frame can reduce the labor of dismantling the existing frame, reduce the environmental load, and reduce the environmental load. The integration of the skeleton and the new skeleton can increase the rigidity of the structure and contribute to the reduction of the number of strut steps. Therefore, it is possible to increase the size of the heavy machinery used for dismantling other existing skeletons, or to increase the number of heavy machinery, etc., making it easier to rationalize the dismantling of the existing skeletons.

According to the joint structure described in Supplementary Note 2, since the second connecting member is provided for connecting at least one of the existing frame or the new frame and the concrete body, it acts on either the existing frame or the new frame. The applied external force (especially shear force) can be transmitted to either the existing skeleton or the new skeleton via the second connecting member. In addition, the number of the first connecting members can be reduced compared to the case where the second connecting member is not provided, and the manufacturing cost of the joined structure can be easily reduced.

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

According to the joint structure described in Supplementary Note 4, the existing frame is the existing outer wall, and the new frame is the newly installed earth retaining piles. 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. In addition, it can contribute to a reduction in the number of steps of struts. Therefore, it is possible to increase the size of heavy machinery, etc. used for dismantling other existing exterior walls, or to increase the number of heavy machinery, etc., making it easy to rationalize the demolition of existing exterior walls. Become.

REFERENCE SIGNS LIST 1 building 10 wall 11 first existing wall 11a lower projecting portion 12 second existing wall 13 new wall 20 new pile 21 first flange portion 22 second flange portion 23 web portion 24 connecting portion 50 joint structure 60 concrete body 70 second 1 connecting member 71 fall prevention part 80 existing side second connecting member 90 newly installed side second connecting member G ground

Claims (3)

A joint 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;
a first connecting member inserted through the concrete body, the first connecting member for connecting the existing skeleton and the new skeleton ;
The existing skeleton is an existing outer wall,
The new frame is a newly installed earth retaining pile,
junction structure. A second connecting member for connecting at least one of the existing skeleton or the new skeleton and the concrete body,
The joined 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 joined structure according to claim 2.

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