JPH0528296B2 - - Google Patents
Info
- Publication number
- JPH0528296B2 JPH0528296B2 JP62283925A JP28392587A JPH0528296B2 JP H0528296 B2 JPH0528296 B2 JP H0528296B2 JP 62283925 A JP62283925 A JP 62283925A JP 28392587 A JP28392587 A JP 28392587A JP H0528296 B2 JPH0528296 B2 JP H0528296B2
- Authority
- JP
- Japan
- Prior art keywords
- anchor
- concrete
- old
- hole
- new concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
Landscapes
- Joining Of Building Structures In Genera (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はコンクリート構造物の増、改築工事等
において、既設の旧コンクリート部と、この旧コ
ンクリート部の表面に新たに打設される新コンク
リート部とを一体に結合するための工法に関する
ものである。Detailed Description of the Invention (Industrial Field of Application) The present invention is applicable to the expansion, renovation, etc. of concrete structures. This relates to a construction method for joining parts together.
（従来技術）
従来、旧コンクリート部と新コンクリート部と
を結合する工法として、旧コンクリート部にアン
カーを打込み、このアンカーに補強鉄筋をねじ込
んだ状態で新コンクリート部を打設し、アンカー
および補強鉄筋と新コンクリート部との結合力に
よつて両コンクリート部の一体状態を確保する工
法がとられている。(Prior art) Conventionally, as a construction method for joining an old concrete part and a new concrete part, anchors are driven into the old concrete part, reinforcing bars are screwed into the anchors, and the new concrete part is cast, and the anchors and reinforcing bars are connected together. A construction method is used to ensure the integrity of both concrete parts through the bonding force between the concrete part and the new concrete part.
ところが、従来の工法によると、
新旧両コンクリート部は、アンカーおよび補
強鉄筋を介して間接的にのみ結合されているこ
と、
使用されるアンカーは、外周面が平坦となつ
ているため、このアンカーと新コンクリート部
との結合強度が、補強鉄筋と新コンクリート部
との結合強度よりも低いこと、
から、新旧両コンクリート部の結合強度が必ずし
も十分ではなく、両コンクリート部の境界面に剥
離現象が生じる等、耐震性に問題があつた。 However, according to conventional construction methods, the old and new concrete sections are only indirectly connected via anchors and reinforcing bars, and the anchors used have flat outer peripheral surfaces, so Since the bonding strength between the new concrete section and the new concrete section is lower than the bonding strength between the reinforcing steel and the new concrete section, the bonding strength between the old and new concrete sections is not necessarily sufficient, and a peeling phenomenon occurs at the interface between the two concrete sections. There were problems with earthquake resistance.
（発明の目的）
そこで本発明は、新旧両コンクリート部の結合
強度を高めて耐震性を向上させることができる新
旧コンクリート部の結合工法を提供するものであ
る。(Object of the Invention) Therefore, the present invention provides a method for joining old and new concrete parts, which can increase the joint strength of both old and new concrete parts and improve seismic resistance.
（発明の構成）
本発明は、既設の旧コンクリート部と、この旧
コンクリート部の表面に新たに打設される新コン
クリート部とを、この両コンクリート部に跨つて
アンカーを埋設した状態で結合する新旧コンクリ
ート部の結合工法であつて、上記アンカーには、
基端部に楔打込み孔、先端部に鉄筋がねじ込まれ
るねじ孔をそれぞれ設けるとともに、中間部外周
面に凹部と凸部が軸方向に連続する凹凸部を設
け、一方、上記旧コンクリート部の表面に上記ア
ンカーの径よりも大径の凹孔、この凹孔の底面に
アンカー挿入孔をそれぞれ設け、上記アンカーの
基端側半部を、上記楔打込み孔に楔を挿入した状
態で上記アンカー挿入孔に挿入し、かつ先端側か
ら強圧することにより上記楔を楔打込み孔内に打
込んで、アンカーを旧コンクリート部に定着さ
せ、この後、旧コンクリート部の表面に新コンク
リート部を、一部が上記凹孔内に入り込む状態で
打設するものである。(Structure of the Invention) The present invention connects an existing old concrete part and a new concrete part to be newly cast on the surface of this old concrete part with an anchor buried across both concrete parts. This is a method of joining old and new concrete parts, and the above anchors include:
A wedge driving hole is provided at the base end, and a screw hole into which the reinforcing steel is screwed is provided at the distal end. In addition, an uneven portion in which concave portions and convex portions are continuous in the axial direction is provided on the outer peripheral surface of the intermediate portion. A recessed hole with a diameter larger than the diameter of the anchor is provided in the recessed hole, and an anchor insertion hole is provided in the bottom of the recessed hole, and the anchor is inserted with the proximal half of the anchor inserted into the wedge driving hole. The wedge is driven into the wedge driving hole by inserting it into the hole and applying strong pressure from the tip side, fixing the anchor to the old concrete part, and then partially attaching the new concrete part to the surface of the old concrete part. The concrete is placed in such a manner that it enters the recessed hole.
この工法によると、新コンクリート部の一部が
旧コンクリート部（凹孔）内に入り込み、この部
分で両コンクリート部が直接結合される。 According to this construction method, a part of the new concrete part enters into the old concrete part (a recessed hole), and the two concrete parts are directly joined at this part.
また、アンカーの外周面に凹凸部を設けること
により、このアンカーと新コンクリート部の結合
強度が高くなる。 Further, by providing an uneven portion on the outer circumferential surface of the anchor, the bonding strength between the anchor and the new concrete portion is increased.
この２点により、新旧両コンクリート部の結合
強度が高められ、コンクリート構造物の耐震性が
向上する。 These two points increase the bonding strength between the old and new concrete parts, improving the earthquake resistance of the concrete structure.
（実施例） 本発明の実施例を図によつて説明する。(Example) Embodiments of the present invention will be described with reference to the drawings.
第１図に新旧両コンクリート部Ａ，Ｂの結合状
態を示している。 Figure 1 shows the state of connection between the old and new concrete parts A and B.
旧コンクリート部Ａには、アンカー取付部分の
表面に、アンカー１の直径よりも大径の凹孔A1
が設けられるとともに、この凹孔A1の底面中心
部にアンカー挿入孔A2が穿設される。 In the old concrete part A, there is a concave hole A 1 with a diameter larger than the diameter of anchor 1 on the surface of the anchor installation part.
is provided, and an anchor insertion hole A2 is bored in the center of the bottom surface of this recessed hole A1 .
アンカー１は、先端部にねじ孔２、基端部に楔
打込み孔３がそれぞれ設けられるとともに、楔打
込み孔３の周壁に、同周壁を拡開可能とするため
の複数条のスリツト４が設けられている。 The anchor 1 is provided with a screw hole 2 at the distal end and a wedge driving hole 3 at the base end, and a plurality of slits 4 are provided in the peripheral wall of the wedge driving hole 3 to allow the peripheral wall to expand. It is being
施工工程を簡単に説明すると、楔打込み孔３に
楔７を挿入した状態でアンカー１の基端側ほぼ半
部をアンカー挿入孔A2に挿入し、アンカー１を
先端側から強圧して楔７を楔打込み孔３に打ち込
むことにより、同孔周壁を拡開させてアンカー挿
入孔A2の周壁に圧接固定する。 To briefly explain the construction process, with the wedge 7 inserted into the wedge driving hole 3, approximately half of the proximal end of the anchor 1 is inserted into the anchor insertion hole A2 , and the anchor 1 is strongly pressed from the distal end side to form the wedge 7. By driving the anchor into the wedge driving hole 3, the circumferential wall of the hole is expanded and fixed to the circumferential wall of the anchor insertion hole A2 by pressure.
こうして、アンカー１を旧コンクリート部Ａ
に、先端側ほぼ半部（以下、先端側半部という）
１ａが同コンクリート部Ａから突出する状態で定
着させ、このアンカー１のねじ孔２に補強鉄筋６
をねじ込んだ後、凹孔A1内を含めて旧コンクリ
ート部Ａの表面に新コンクリート部Ｂを打設す
る。 In this way, anchor 1 is attached to the old concrete part A.
Almost half of the distal side (hereinafter referred to as the distal half)
The anchor 1a is fixed in a state protruding from the concrete part A, and the reinforcing reinforcing bar 6 is inserted into the screw hole 2 of this anchor 1.
After screwing in, pour the new concrete part B on the surface of the old concrete part A, including inside the recessed hole A1 .
この状態で、新旧両コンクリート部Ａ，Ｂがア
ンカー１および補強鉄筋６を介して間接的に結合
されると同時に、新コンクリート部Ｂの一部B1
が同コンクリート部Ｂから突出する形で旧コンク
リート部Ａの凹孔A1内に入り込むことにより、
両コンクリート部Ａ，Ｂがこの凹孔A1と突出部
B1とによる凹凸結合状態で直接結合される。 In this state, both the old and new concrete parts A and B are indirectly connected via the anchor 1 and reinforcing steel 6, and at the same time, part B 1 of the new concrete part B
By protruding from the same concrete part B and entering the recess A1 of the old concrete part A,
Both concrete parts A and B are connected to this concave hole A1 and the protruding part
It is directly bonded with B 1 in a concave-convex bond state.
このように、両コンクリート部Ａ，Ｂを間接、
直接両面から結合するため、間接結合のみによる
従来工法と比較して、基本的に結合強度が高いも
のとなる。 In this way, both concrete parts A and B are connected indirectly,
Because it is directly bonded from both sides, the bond strength is basically higher than that of conventional construction methods that use only indirect bonding.
また、アンカー１による間接結合強度を高める
ために、アンカー１の外周面に凹凸部５を設けて
いる。 Moreover, in order to increase the strength of indirect connection by the anchor 1, an uneven portion 5 is provided on the outer peripheral surface of the anchor 1.
この凹凸部５は、新コンクリート部打設状態で
両コンクリート部Ａ，Ｂの境界に位置する部分を
境として、新コンクリート部Ｂに埋入される先端
側半部１ａに設けられた第１凹凸部５１と、旧コ
ンクリート部Ａの凹孔A1（新コンクリート部Ｂの
突出部B1）内に位置する部分に設けられた第２
凹凸部５２とに分かれている。 This uneven part 5 is a first uneven part provided in the tip half part 1a to be embedded in the new concrete part B, with the part located at the boundary between both concrete parts A and B in the new concrete part pouring state as a boundary. 51 and a second hole provided in the part located inside the recessed hole A 1 of the old concrete part A (the protruding part B 1 of the new concrete part B).
It is divided into uneven parts 52.
第１凹凸部５１の凹部５１ａは、アンカー外周
面に径方向両側からほぼ全周部分にプレス力を加
えることによつて形成しており、このようなプレ
ス力を加えられない原形部分が相対的に凸部５１
ｂとなる。 The recessed portion 51a of the first uneven portion 51 is formed by applying a pressing force to almost the entire circumference from both sides in the radial direction on the outer circumferential surface of the anchor, and the original portion to which such pressing force cannot be applied is relatively Convex portion 51
It becomes b.
また、このプレス成形により、凹部５１ａ……
を形成する上下の型の突合せ部分に耳状の張出し
部５１ｃが形成される。 Moreover, by this press molding, the recessed portion 51a...
An ear-shaped projecting portion 51c is formed at the abutting portion of the upper and lower molds forming the mold.
この張出し部５１ｃ……は、凸部５１ｂ……よ
りも径方向に突出するため、この張出し部５１ｃ
……と凸部５１ｂ……とによつても凹凸が形成さ
れる。 This overhanging portion 51c... protrudes more in the radial direction than the convex portion 51b..., so this overhanging portion 51c...
. . . and the convex portions 51b . . . form unevenness.
一方、第２凹凸部５２の凹部５２ａは、第１凹
凸部５１の凹部５１ａよりは小さなプレス力を、
同凹部５１ａ……より短い周方向長さ部分に加え
ることによつて、同凹部５１ａ……より浅くかつ
短く形成している。 On the other hand, the concave portion 52a of the second concavo-convex portion 52 applies a smaller pressing force than the concave portion 51a of the first concavo-convex portion 51.
By adding the recess 51a to a shorter circumferential length portion, the recess 51a is formed to be shallower and shorter than the recess 51a.
従つて、この第２凹凸部５２については、第１
凹凸部５１の張出し部５１ｃのようなアンカー外
周への突出部分は生じず、凹部５２ａ……以外の
すべての部分が相対的に凸部５２ｂとなる。 Therefore, regarding this second uneven portion 52, the first
There is no protruding portion to the outer periphery of the anchor like the overhanging portion 51c of the uneven portion 51, and all portions other than the recessed portions 52a become relatively convex portions 52b.
このようにアンカー外周面に凹凸部５を設けて
いるため、同外周面に対する新コンクリート部Ｂ
の結合強度を強化でき、これらの結合強度を、鉄
筋６と同コンクリート部Ｂとの結合強度を同等以
上に高めることができる。 Since the uneven part 5 is provided on the outer circumferential surface of the anchor in this way, the new concrete part B with respect to the same outer circumferential surface
The bonding strength between the reinforcing bars 6 and the concrete portion B can be increased to be equal to or higher than the bonding strength between the reinforcing bars 6 and the concrete portion B.
しかも、第１凹凸部５１は、凹凸が深く、か
つ、耳状の張出し部５１ｃ……をも備えた二段の
凹凸形状に形成しているため、この第１凹凸部５
１によるアンカー１と新コンクリート部Ｂの結合
強度が一層高いものとなる。 Moreover, since the first uneven portion 51 is formed into a two-stage uneven shape with deep unevenness and ear-shaped overhang portions 51c, the first uneven portion 5
1, the bonding strength between the anchor 1 and the new concrete part B becomes even higher.
また、第２凹凸部５２によつて、旧コンクリー
ト部Ａの凹孔A1に入り込んだ新コンクリート部
Ｂの突出部B1とアンカー１との結合状態、すな
わち凹孔A1と突出部B1による凹凸結合部分の結
合状態が強化される。 Furthermore, the second uneven portion 52 allows the connection state between the anchor 1 and the protruding portion B 1 of the new concrete portion B that has entered the recessed hole A 1 of the old concrete portion A, that is, the recessed hole A 1 and the protruding portion B 1 . The bonded state of the concave-convex bonded portion is strengthened.
しかも、この第２凹凸部５２は、アンカー外周
への突出部分がない浅い凹凸形状としているた
め、この第２凹凸部５２が、アンカー挿入孔A2
に対するアンカー挿入の邪魔になるといつた不都
合が生じない。 Moreover, since the second uneven portion 52 has a shallow uneven shape with no protruding portion toward the outer periphery of the anchor, the second uneven portion 52 is connected to the anchor insertion hole A 2 .
This eliminates the inconvenience caused by interfering with anchor insertion.
ところで、第１凹凸部５１を第２凹凸部５２と
同一の凹凸形状としてもよい。また、この凹凸形
状およびその成形手段は、上記実施例以外に種々
選択しうるところであり、たとえばアンカー外周
面に間欠的にリング状凸部を突設するか、あるい
は外周面に間欠的に周溝を刻設することによつて
凹凸形状を得るようにしてもよい。また、アンカ
ー外周面にねじ溝を刻設して、凹凸部をねじ状に
形成してもよい。 By the way, the first uneven portion 51 may have the same uneven shape as the second uneven portion 52. In addition, this uneven shape and its forming means can be selected from various methods other than the above-mentioned embodiments. For example, ring-shaped protrusions may be provided intermittently on the outer circumferential surface of the anchor, or circumferential grooves may be intermittently provided on the outer circumferential surface of the anchor. The uneven shape may be obtained by carving. Further, the uneven portion may be formed into a thread shape by carving a thread groove on the outer peripheral surface of the anchor.
（発明の効果）
上記のように本発明によるときは、
(イ) 旧コンクリート部の表面におけるアンカー挿
入孔の入口部分に凹孔を設け、この凹孔内に新
コンクリート部の一部を入り込ませて、この部
分で両コンクリート部を直接結合すること、
(ロ) アンカーの外周面に凹凸部を設けているた
め、この凹凸部によつてアンカーと新コンクリ
ート部の結合強度が高くなること、
の２点により、新旧両コンクリート部の結合強度
を高め、コンクリート構造物の耐震性を向上させ
ることができる。(Effects of the Invention) As described above, according to the present invention, (a) A recessed hole is provided at the entrance of the anchor insertion hole on the surface of the old concrete part, and a part of the new concrete part is inserted into this recessed hole. (b) Since the outer peripheral surface of the anchor is provided with an uneven part, this uneven part increases the bonding strength between the anchor and the new concrete part. With these two points, it is possible to increase the bonding strength between the old and new concrete parts and improve the earthquake resistance of the concrete structure.
第１図は本発明の実施例を示す断面図、第２図
は使用されるアンカーの斜視図、第３図は同アン
カーの平面図である。
Ａ……旧コンクリート部、A1……凹孔、A2…
…アンカー挿入孔、Ｂ……新コンクリート部、
B1……新コンクリート部における凹孔に入り込
んだ部分、１……アンカー、２……アンカーのね
じ孔、３……同楔打込み孔、５……同凹凸部。
FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a perspective view of an anchor used, and FIG. 3 is a plan view of the anchor. A... Old concrete part, A 1 ... Recessed hole, A 2 ...
...Anchor insertion hole, B...New concrete part,
B 1 ...The part that entered the concave hole in the new concrete part, 1...Anchor, 2...Anchor screw hole, 3...The same wedge driving hole, 5...The same uneven part.
Claims (1)
ート部の表面に新たに打設される新コンクリート
部とを、この両コンクリート部に跨つてアンカー
を埋設した状態で結合する新旧コンクリート部の
結合工法であつて、上記アンカーには、基端部に
楔打込み孔、先端部に鉄筋がねじ込まれるねじ孔
をそれぞれ設けるとともに、中間部外周面に凹部
と凸部が軸方向に連続する凹凸部を設け、一方、
上記旧コンクリート部の表面に上記アンカーの径
よりも大径の凹孔、この凹孔の底面にアンカー挿
入孔をそれぞれ設け、上記アンカーの基端側半部
を、上記楔打込み孔に楔を挿入した状態で上記ア
ンカー挿入孔に挿入し、かつ先端側から強圧する
ことにより上記楔を楔打込み孔内に打込んで、ア
ンカーを旧コンクリート部に定着させ、この後、
旧コンクリート部の表面に新コンクリート部を、
一部が上記凹孔内に入り込む状態で打設すること
を特徴とする新旧コンクリート部の結合工法。1. A method of joining old and new concrete parts, in which an existing old concrete part and a new concrete part to be newly poured on the surface of the old concrete part are joined with anchors buried across both concrete parts. The above-mentioned anchor is provided with a wedge driving hole at the base end and a screw hole into which the reinforcing bar is screwed into the distal end, and an uneven part in which a concave part and a convex part are continuous in the axial direction on the outer peripheral surface of the intermediate part. ,
A recessed hole with a diameter larger than the diameter of the anchor is provided on the surface of the old concrete part, an anchor insertion hole is provided at the bottom of this recessed hole, and a wedge is inserted into the wedge driving hole with the proximal half of the anchor. Insert the anchor into the anchor insertion hole in this state, and drive the wedge into the wedge driving hole by applying strong pressure from the tip side to fix the anchor in the old concrete part, and then,
A new concrete section is placed on the surface of the old concrete section.
A method for joining old and new concrete parts, characterized by pouring with a part of the concrete part entering the recessed hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28392587A JPH01125443A (en) | 1987-11-10 | 1987-11-10 | Anchor for bonding both novel and old concrete section and method of said bonding construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28392587A JPH01125443A (en) | 1987-11-10 | 1987-11-10 | Anchor for bonding both novel and old concrete section and method of said bonding construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01125443A JPH01125443A (en) | 1989-05-17 |
| JPH0528296B2 true JPH0528296B2 (en) | 1993-04-23 |
Family
ID=17671984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28392587A Granted JPH01125443A (en) | 1987-11-10 | 1987-11-10 | Anchor for bonding both novel and old concrete section and method of said bonding construction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01125443A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0566160U (en) * | 1991-10-30 | 1993-08-31 | 弥生スチール株式会社 | Anchor differential muscle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS617288U (en) * | 1984-06-18 | 1986-01-17 | オリンパス光学工業株式会社 | Strobe circuit for photography |
-
1987
- 1987-11-10 JP JP28392587A patent/JPH01125443A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS617288U (en) * | 1984-06-18 | 1986-01-17 | オリンパス光学工業株式会社 | Strobe circuit for photography |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01125443A (en) | 1989-05-17 |
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