JP2012067495A - Slit structure - Google Patents

Slit structure Download PDF

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JP2012067495A
JP2012067495A JP2010212790A JP2010212790A JP2012067495A JP 2012067495 A JP2012067495 A JP 2012067495A JP 2010212790 A JP2010212790 A JP 2010212790A JP 2010212790 A JP2010212790 A JP 2010212790A JP 2012067495 A JP2012067495 A JP 2012067495A
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slit
concrete
support member
slit structure
slit body
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JP5627972B2 (en
Inventor
Nobuhiro Okuyama
信博 奥山
Masahiro Indo
正裕 印藤
Mitsutoshi Kanno
光寿 菅野
Ryoichi Shohara
良一 称原
Masatake Omori
正武 大森
Shinichi Kajinami
信一 梶波
Muneo Sawaki
宗生 佐脇
Shigenori Nishida
重徳 西田
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Shimizu Construction Co Ltd
Okabe Co Ltd
Shimizu Corp
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Shimizu Construction Co Ltd
Okabe Co Ltd
Shimizu Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a slit structure with improved reliability in terms of strength against a side pressure when placing concrete.SOLUTION: A slit structure 10 provided on a boundary part of a column 12 and a wall 14 of a concrete structure includes: a support member 18 of an almost U-shaped cross section for engaging with and supporting a slit body 16 from both front and rear sides; and a joint bar 20 adjacently arranged at the front and rear of the slit body 16 through the support member 18. The support member 18, the joint bar 20 and a concrete form 22 are fixed by a bolt 24 and a flat nut plate 36, a channel 26 is put along the side face of the slit body 16 in the vertical direction to reinforce the slit body 16, a separator 30 arranged at an interval at the side part of the slit body 16 is made to pass through a reinforcing metal fitting 32, and the reinforcing metal fitting 32 and the slit body 16 are fixed by a connection bolt 34.

Description

本発明は、コンクリート構造物の柱と壁の接合部などの構造体同士の境界部に設ける耐震用のスリット構造に関するものである。   The present invention relates to a slit structure for earthquake resistance provided at a boundary portion between structures such as a joint between a pillar and a wall of a concrete structure.

従来、ビル等のコンクリート構造物において、柱と壁の接合部など構造体同士の境界部分に、垂直に延びる構造スリットを設けて構造的に分断し、地震の揺れによる損傷等の低減を図ることが知られている(例えば、特許文献1参照)。   Conventionally, in a concrete structure such as a building, a structural slit extending vertically is provided at the boundary between structures, such as a joint between a column and a wall, and structurally divided to reduce damage due to earthquake shaking. Is known (see, for example, Patent Document 1).

図4は、特許文献1のスリット構造の概略の平面断面図である。図4に示すように、このスリット構造1は、スリット材本体2と、スリット材本体2を両側から係合支持する略コ字状断面の支持部材3、4と、支持部材3、4相互間に架設される補助部材5とから構成される。スリット材本体2は目地棒を兼ねた固定部材8、9を介して型枠6、7に取り付けられる。固定部材8、9を型枠6、7に固定する方法としては、釘打ちが一般に利用されている。目地棒を含むスリット全体としては、せき板同士を固定するセパレータの締め付けにより、せき板間に挟まれる形で固定される。また、補強部材5は、コンクリートが先に打設される側(例えば柱側)の反対側(例えば壁側)に架設され、打設時に作用する側圧による支持部材3、4相互間の拡がりを防止してスリット材本体2の変形や外れを回避している。   FIG. 4 is a schematic plan sectional view of the slit structure of Patent Document 1. As shown in FIG. 4, the slit structure 1 includes a slit material body 2, support members 3 and 4 having a substantially U-shaped cross section for engaging and supporting the slit material body 2 from both sides, and the support members 3 and 4. And an auxiliary member 5 installed on the frame. The slit material body 2 is attached to the molds 6 and 7 through fixing members 8 and 9 that also serve as joint rods. As a method of fixing the fixing members 8 and 9 to the molds 6 and 7, nailing is generally used. The entire slit including the joint rod is fixed so as to be sandwiched between the slats by fastening the separators that fix the slats. Further, the reinforcing member 5 is installed on the opposite side (for example, the wall side) to the side on which the concrete is first placed (for example, the wall side), and spreads between the support members 3 and 4 due to the side pressure acting at the time of placing. This prevents the slit material body 2 from being deformed or detached.

特開2002−194920号公報JP 2002-194920 A

ところで、従来のスリット構造は、コンクリート打設時に一気にコンクリートを打設すると、耐力上の問題から目地棒やスリット材本体に曲がりが発生するおそれがあった。こうした曲がりが発生すると、コンクリート硬化後にスリット材本体が柱側に食い込んだり、スリット材本体が左右に湾曲するもととなる。この対策として、スリット構造の両側を、例えば高さ1mづつ交互にコンクリート打設する方法が知られている。しかし、施工条件が複雑となって作業の効率の低下と手順の間違いを招くおそれがあった。   By the way, in the conventional slit structure, if concrete is poured at a time when the concrete is placed, there is a possibility that the joint rod or the slit material body may bend due to a problem in strength. When such bending occurs, the slit material main body bites into the column side after the concrete is hardened, or the slit material main body is bent left and right. As a countermeasure, there is known a method of placing concrete on both sides of the slit structure alternately, for example, every 1 m in height. However, the construction conditions are complicated and there is a risk that the efficiency of the work is reduced and the procedure is wrong.

また、上記のとおり、目地棒を固定する方法としては、釘打ちが一般に利用されている。しかし、釘が真っ直ぐに打てない等の問題があり、強度的な信頼性が低い構造となるおそれもあった。   As described above, nailing is generally used as a method for fixing the joint rod. However, there is a problem that the nail cannot be struck straight, which may result in a structure with low strength reliability.

本発明は、上記に鑑みてなされたものであって、コンクリート打設時の側圧に対する強度的な信頼性と、曲げに対する防御性を高めたスリット構造を提供することを目的とする。   This invention is made | formed in view of the above, Comprising: It aims at providing the slit structure which improved the strong reliability with respect to the side pressure at the time of concrete pouring, and the defense against bending.

上記の課題を解決し、目的を達成するために、本発明の請求項1に係るスリット構造は、コンクリート構造物の柱と壁の境界部に設けるスリット構造であって、スリット本体を前後両側から係合支持する略コ字状断面の支持部材と、この支持部材を介してスリット本体の前後に隣接配置した目地棒とを備え、この支持部材とこの目地棒とコンクリート型枠とをボルトと平ナットプレートで固定したことを特徴とする。   In order to solve the above-described problems and achieve the object, a slit structure according to claim 1 of the present invention is a slit structure provided at a boundary between a pillar and a wall of a concrete structure, and the slit body is provided from both the front and rear sides. A support member having a substantially U-shaped cross-section to be engaged and supported, and a joint rod disposed adjacent to the front and rear of the slit body via the support member, and the support member, the joint rod, and the concrete form frame are connected to a bolt and a flat plate. It is fixed with a nut plate.

また、本発明の請求項2に係るスリット構造は、上述した請求項1において、スリット本体の側面に溝型鋼を上下方向に沿わせてスリット本体を補強するとともに、スリット本体の側方に間隔をあけて配置するセパレータを補強金具に貫通し、この補強金具とスリット本体とを連結ボルトで固定したことを特徴とする。   The slit structure according to claim 2 of the present invention is the slit structure according to claim 1 described above, wherein the slit body is reinforced along the side surface of the slit body along the vertical direction, and the side of the slit body is spaced apart. A separator to be opened is passed through the reinforcing metal fitting, and the reinforcing metal fitting and the slit main body are fixed with a connecting bolt.

また、本発明の請求項3に係るスリット構造は、上述した請求項1または2において、支持部材と目地棒とコンクリート型枠とを固定するボルトを、コンクリート打設後に取り外し可能に構成したことを特徴とする。   In addition, the slit structure according to claim 3 of the present invention is that in the above-described claim 1 or 2, the bolt for fixing the support member, the joint rod, and the concrete formwork is configured to be removable after placing the concrete. Features.

また、本発明の請求項4に係るスリット構造は、上述した請求項1〜3のいずれか一つにおいて、溝型鋼をスリット本体の両側面に上下方向に沿わせ、補強金具からの連結ボルトを、スリット本体を貫通して奥側の溝型鋼に固定したことを特徴とする。   A slit structure according to a fourth aspect of the present invention is the slit structure according to any one of the first to third aspects, wherein the grooved steel is vertically aligned with both side surfaces of the slit main body, and the connecting bolt from the reinforcing metal fitting is provided. It is characterized in that it is fixed to the rear channel steel through the slit body.

また、本発明の請求項5に係るスリット構造は、上述した請求項1〜4のいずれか一つにおいて、連結ボルトの頭部に緩衝材を設けたことを特徴とする。   Moreover, the slit structure which concerns on Claim 5 of this invention has provided the shock absorbing material in the head of a connection bolt in any one of Claims 1-4 mentioned above.

本発明によれば、コンクリート構造物の柱と壁の境界部に設けるスリット構造であって、スリット本体を前後両側から係合支持する略コ字状断面の支持部材と、この支持部材を介してスリット本体の前後に隣接配置した目地棒とを備え、この支持部材とこの目地棒とコンクリート型枠とをボルトと平ナットプレートで固定したので、コンクリート打設時の側圧に対する強度的な信頼性を高めることができるという効果を奏する。   According to the present invention, there is a slit structure provided at the boundary between a pillar and a wall of a concrete structure, and a substantially U-shaped cross-section supporting member that engages and supports the slit main body from both the front and rear sides, and via this supporting member It has joint rods arranged adjacent to the front and back of the slit body, and this support member, this joint rod and concrete formwork are fixed with bolts and flat nut plates, so that the strength reliability against the side pressure when placing concrete is improved. There is an effect that it can be increased.

図1は、本発明に係るスリット構造の実施例を示す平面断面図である。FIG. 1 is a plan sectional view showing an embodiment of a slit structure according to the present invention. 図2は、スリット構造の部分概略斜視図である。FIG. 2 is a partial schematic perspective view of the slit structure. 図3は、補強金具の部分概略斜視図である。FIG. 3 is a partial schematic perspective view of the reinforcing metal fitting. 図4は、従来のスリット構造の一例を示す平面断面図である。FIG. 4 is a plan sectional view showing an example of a conventional slit structure.

以下に、本発明に係るスリット構造の実施の形態を図面に基づいて詳細に説明する。なお、この実施例によりこの発明が限定されるものではない。   Embodiments of a slit structure according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

図1〜図3に示すように、本発明に係るスリット構造10は、コンクリート構造物の柱12と壁14の境界部に設けるスリット構造であって、発泡スチロールやフェノールボードからなるスリット本体16と、スリット本体16を前後両側から係合支持する略コ字状断面の支持部材18と、この支持部材18を介してスリット本体16に隣接配置した目地棒20とを備える。支持部材18と目地棒20とせき板22(コンクリート型枠)とは、ボルト24と平ナットプレート36で固定してある。このように、釘を用いずに高剛性で固定力の強いボルト24と平ナットプレート36で固定することで、目地棒20の曲がりの発生を防ぐことができる。なお、このボルト24は、コンクリート打設後に取り外し可能に構成してある。   As shown in FIG. 1 to FIG. 3, the slit structure 10 according to the present invention is a slit structure provided at the boundary between a pillar 12 and a wall 14 of a concrete structure, and includes a slit body 16 made of polystyrene foam or phenol board, A support member 18 having a substantially U-shaped cross section that engages and supports the slit body 16 from both the front and rear sides, and a joint rod 20 disposed adjacent to the slit body 16 via the support member 18 are provided. The support member 18, the joint rod 20, and the slat plate 22 (concrete formwork) are fixed by bolts 24 and a flat nut plate 36. As described above, the joint rod 20 can be prevented from being bent by fixing it with the bolt 24 and the flat nut plate 36 having high rigidity and strong fixing force without using nails. The bolt 24 is configured to be removable after placing concrete.

また、スリット本体16の左右側面には、溝型鋼26を上下方向に沿って設けてある。この溝型鋼26は、ウェブ外面がスリット本体16の側面に対向してあり、フランジ部分がリブとして作用し、コンクリート打設時の側圧に対する曲げ剛性を高めることができる。   In addition, groove steel 26 is provided on the left and right side surfaces of the slit body 16 along the vertical direction. In the grooved steel 26, the outer surface of the web faces the side surface of the slit body 16, and the flange portion acts as a rib, so that the bending rigidity against the side pressure at the time of placing concrete can be increased.

この溝型鋼26は、階高にもよるが、例えば、床面から立ち上げてスリット本体16の高さ1〜3m程度までの範囲に架設される。このようにすれば、スリット本体16の剛性を高めて、柱12と壁14のいずれか一方の側のみに高さ4m程度までコンクリートを一度に打設しても、打設時の側圧によってスリット本体16が左右に曲がることを防ぐことができる。   Although the grooved steel 26 depends on the floor height, for example, it rises from the floor surface and is installed in a range of about 1 to 3 m in height of the slit body 16. In this way, the rigidity of the slit body 16 is increased, and even if concrete is placed on only one side of the column 12 and the wall 14 up to a height of about 4 m at a time, the slit is caused by the lateral pressure at the time of placement. It is possible to prevent the main body 16 from bending left and right.

また、この溝型鋼26は、スリット本体16の上に設置した上層のスリット本体を支持可能なように、上下層間の継ぎ目を跨いで上層に幾分被るように配置することもできる。例えば、この被りの長さを5cm程度として、上層のスリット本体の下端の強度補強も兼ねるようにしてもよい。   In addition, the grooved steel 26 can be disposed so as to cover the upper layer somewhat across the seam between the upper and lower layers so that the upper slit body installed on the slit body 16 can be supported. For example, the length of the cover may be set to about 5 cm so as to strengthen the strength of the lower end of the upper slit body.

また、スリット本体16の側方には、間隔をあけてナット28付きのセパレータ30が配置される。セパレータ30は、補強金具32に貫通してある。具体的には、この補強金具32は、山形鋼38とその両端に蓋をするように取り付けた端板40とからなり、セパレータ30は端板40同士を貫通している。この補強金具32の山形鋼38側部とスリット本体16とは、左右に延びる連結ボルト34で固定される。これにより、スリット本体16に加わる左右方向の圧縮力と引っ張り力に抵抗することができ、コンクリート打設時の側圧に対する強度的な信頼性を高めることができる。なお、補強金具32は、この形態に限るものではなく、山形鋼38の代わりに溝形鋼を用いた形態のものを使用しても構わない。   In addition, a separator 30 with a nut 28 is disposed on the side of the slit body 16 with a gap therebetween. The separator 30 penetrates the reinforcing metal fitting 32. Specifically, the reinforcing metal fitting 32 includes an angle steel 38 and end plates 40 attached so as to cover both ends thereof, and the separator 30 penetrates the end plates 40. The side portion of the angle steel 38 of the reinforcing metal fitting 32 and the slit main body 16 are fixed by connecting bolts 34 extending left and right. Thereby, it is possible to resist the compression force and the pulling force in the left-right direction applied to the slit main body 16, and it is possible to enhance the strength reliability against the side pressure at the time of placing concrete. In addition, the reinforcing metal fitting 32 is not limited to this form, and a form using a grooved steel instead of the angle steel 38 may be used.

また、連結ボルト34は、外周面にネジ山が切られた凸部34aと、内周面にネジ山が切られた凹部34bとからなる。凸部34aは、柱12側の溝型鋼26から入りスリット本体16を貫通して、補強金具32から延びる連結ボルト34の凹部34b内に螺合している。ここで、壁14側が地震により押された場合には、セパレータ30の動きが補強金具32を介して連結ボルト34を押す形となる。この場合、柱12側の溝型鋼26から露出した連結ボルト34の凸部34aの頭部34cが周囲のコンクリートを擦ってクラックを発生させるおそれがあることから、対策として、頭部34cにはウレタン等の緩衝材(図示なし)を吹き付けることができ、または、例えば、固形状の緩衝材を取り付けることもできる。   Further, the connecting bolt 34 is composed of a convex portion 34a whose outer peripheral surface is threaded and a concave portion 34b whose inner peripheral surface is threaded. The convex portion 34 a enters from the grooved steel 26 on the column 12 side, penetrates the slit main body 16, and is screwed into the concave portion 34 b of the connecting bolt 34 extending from the reinforcing bracket 32. Here, when the wall 14 side is pushed by an earthquake, the movement of the separator 30 pushes the connecting bolt 34 via the reinforcing metal fitting 32. In this case, the head 34c of the projection 34a of the connecting bolt 34 exposed from the channel steel 26 on the column 12 side may rub against the surrounding concrete to generate cracks. A cushioning material (not shown) or the like can be sprayed, or a solid cushioning material can be attached, for example.

なお、目地棒20を固定するボルト24の上下方向の配置間隔や、補強金具32を設けるセパレータ30の上下方向の配置間隔は、施工上問題のない適正な間隔で設定することが好ましく、例えば、強度実験等を行って最適な間隔を適宜設定することが望ましい。   In addition, it is preferable to set the vertical arrangement interval of the bolts 24 for fixing the joint rods 20 and the vertical arrangement interval of the separators 30 provided with the reinforcing metal fittings 32 at an appropriate interval with no problem in construction. It is desirable to set an optimum interval as appropriate by conducting a strength experiment or the like.

次に、本発明のスリット構造10により得られる効果について説明する。
(1)目地棒20をボルト24で固定したため、従来の釘打ちによる固定に比べて安定的な固定が可能となり、スリット構造の強度的な信頼性を高めることができる。
(2)セパレータ30による側方からの補強により、スリット構造に加わる側方荷重に効果的に対抗することができる。
(3)溝型鋼26をスリット本体16の側面に配置することにより、スリット本体16の側面を補強することができる。
(4)補強金具32は、セパレータ30が貫通した構造であることから、施工時に外れることがなく、連結ボルト34を介して、スリット本体16を側方から確実に補強することができる。
Next, the effect obtained by the slit structure 10 of the present invention will be described.
(1) Since the joint rod 20 is fixed with the bolts 24, the fixing can be performed more stably than the conventional fixing by nailing, and the strength reliability of the slit structure can be enhanced.
(2) By lateral reinforcement by the separator 30, it is possible to effectively counter the lateral load applied to the slit structure.
(3) By disposing the grooved steel 26 on the side surface of the slit body 16, the side surface of the slit body 16 can be reinforced.
(4) Since the reinforcing metal fitting 32 has a structure through which the separator 30 penetrates, the slit main body 16 can be reliably reinforced from the side via the connecting bolt 34 without being detached during construction.

上記(1)〜(4)の4つの効果により、施工上問題のない強度を確保することができ、施工条件の緩和を図ることができる。このため、例えば、柱側に高さ4m程度のコンクリートを一度に打設しても、側圧によるスリット本体16の曲がりを防ぐことができる。   Due to the four effects (1) to (4), it is possible to ensure strength without problems in construction, and to ease the construction conditions. For this reason, for example, even if concrete having a height of about 4 m is placed on the column side at once, the bending of the slit body 16 due to the side pressure can be prevented.

以上説明したように、本発明によれば、コンクリート構造物の柱と壁の境界部に設けるスリット構造であって、スリット本体を前後両側から係合支持する略コ字状断面の支持部材と、この支持部材を介してスリット本体の前後に隣接配置した目地棒とを備え、この支持部材とこの目地棒とコンクリート型枠とをボルトと平ナットプレートで固定したので、コンクリート打設時の側圧に対する強度的な信頼性を高めることができる。   As described above, according to the present invention, the slit structure provided at the boundary between the pillar and the wall of the concrete structure, the support member having a substantially U-shaped cross section for engaging and supporting the slit main body from both the front and rear sides, There are joint rods arranged adjacent to the front and rear of the slit body through the support member, and the support member, the joint rod and the concrete formwork are fixed with bolts and a flat nut plate. Strength reliability can be improved.

以上のように、本発明に係るスリット構造は、ビル等のコンクリート構造物の柱と壁の接合部などの構造体同士の境界部に設ける耐震用のスリット構造に有用であり、特に、コンクリート打設時の側圧に対する強度的な信頼性と、曲げに対する防御性を高めるのに適している。   As described above, the slit structure according to the present invention is useful for a seismic slit structure provided at a boundary portion between structures such as a joint between a pillar of a concrete structure such as a building and a wall, and in particular, concrete striking. It is suitable for enhancing the strength reliability against the lateral pressure during installation and the protection against bending.

10 スリット構造
12 柱
14 壁
16 スリット本体
18 支持部材
20 目地棒
22 せき板(コンクリート型枠)
24 ボルト
26 溝型鋼
28 ナット
30 セパレータ
32 補強金具
34 連結ボルト
36 平ナットプレート
38 山形鋼
40 端板
DESCRIPTION OF SYMBOLS 10 Slit structure 12 Column 14 Wall 16 Slit main body 18 Support member 20 Joint rod 22 Slat board (concrete formwork)
24 Bolt 26 Grooved Steel 28 Nut 30 Separator 32 Reinforcement Bracket 34 Connection Bolt 36 Flat Nut Plate 38 Angle Steel 40 End Plate

Claims (5)

コンクリート構造物の柱と壁の境界部に設けるスリット構造であって、
スリット本体を前後両側から係合支持する略コ字状断面の支持部材と、この支持部材を介してスリット本体の前後に隣接配置した目地棒とを備え、
この支持部材とこの目地棒とコンクリート型枠とをボルトと平ナットプレートで固定したことを特徴とするスリット構造。
A slit structure provided at the boundary between a pillar and a wall of a concrete structure,
A substantially U-shaped cross-section support member that engages and supports the slit main body from both front and rear sides, and a joint rod that is disposed adjacent to the front and rear of the slit main body via this support member,
A slit structure in which the support member, the joint rod, and the concrete form are fixed with bolts and a flat nut plate.
スリット本体の側面に溝型鋼を上下方向に沿わせてスリット本体を補強するとともに、スリット本体の側方に間隔をあけて配置するセパレータを補強金具に貫通し、この補強金具とスリット本体とを連結ボルトで固定したことを特徴とする請求項1に記載のスリット構造。   Reinforce the slit body by placing a grooved steel along the vertical direction on the side of the slit body, and penetrate the reinforcing bracket through a separator that is spaced apart from the side of the slit body, and connect this reinforcement bracket to the slit body. The slit structure according to claim 1, wherein the slit structure is fixed with a bolt. 支持部材と目地棒とコンクリート型枠とを固定するボルトを、コンクリート打設後に取り外し可能に構成したことを特徴とする請求項1または2に記載のスリット構造。   The slit structure according to claim 1 or 2, wherein the bolt for fixing the support member, the joint rod, and the concrete form is detachable after the concrete is placed. 溝型鋼をスリット本体の両側面に上下方向に沿わせ、補強金具からの連結ボルトを、スリット本体を貫通して奥側の溝型鋼に固定したことを特徴とする請求項1〜3のいずれか一つに記載のスリット構造。   The grooved steel is vertically aligned with both side surfaces of the slit body, and the connecting bolt from the reinforcing bracket is fixed to the grooved steel on the back side through the slit body. The slit structure as described in one. 連結ボルトの頭部に緩衝材を設けたことを特徴とする請求項1〜4のいずれか一つに記載のスリット構造。   The slit structure according to any one of claims 1 to 4, wherein a buffer material is provided on a head portion of the connecting bolt.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018071207A (en) * 2016-10-31 2018-05-10 日本仮設株式会社 Installation method of aseismatic slit material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59175545U (en) * 1983-05-11 1984-11-24
JP2001220833A (en) * 2000-02-08 2001-08-17 Nippon Kasetsu Kk Concrete-crack inducing joint filler and its usage
JP2002013311A (en) * 2000-06-28 2002-01-18 Wako Sangyo Kk Wall structure for concrete building

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59175545U (en) * 1983-05-11 1984-11-24
JP2001220833A (en) * 2000-02-08 2001-08-17 Nippon Kasetsu Kk Concrete-crack inducing joint filler and its usage
JP2002013311A (en) * 2000-06-28 2002-01-18 Wako Sangyo Kk Wall structure for concrete building

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018071207A (en) * 2016-10-31 2018-05-10 日本仮設株式会社 Installation method of aseismatic slit material

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