JP2016011511A - Post-construction anchor and construction method thereof - Google Patents

Post-construction anchor and construction method thereof Download PDF

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JP2016011511A
JP2016011511A JP2014132888A JP2014132888A JP2016011511A JP 2016011511 A JP2016011511 A JP 2016011511A JP 2014132888 A JP2014132888 A JP 2014132888A JP 2014132888 A JP2014132888 A JP 2014132888A JP 2016011511 A JP2016011511 A JP 2016011511A
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anchor
post
main body
construction
diameter
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JP5797815B1 (en
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栄次 槇谷
Eiji Makitani
栄次 槇谷
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HOSODA KENSETSU KK
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Abstract

PROBLEM TO BE SOLVED: To provide a post-construction anchor and a construction method thereof, capable of shallowing a bore hole part formed in a base material of a structure more than usual, capable of shortening the length of the post-construction anchor more than usual, and also strong against shear force in an earthquake.SOLUTION: A post-construction anchor is formed by inserting an anchor body part into a bore hole part of a base material with a part of the anchor body part projected to an external part, filling cement mortar in a clearance between the anchor body part and the bore hole part and burying and fixing a projected part by reinforced concrete, and comprises the anchor body part and a large diameter end part provided on both ends in the lengthwise direction of the anchor body part.

Description

本発明は、本発明は後施工アンカー及びその施工方法に係り、例えば耐震補強のために既存の構造物に固定される後施工アンカー及びその施工方法に関する。   The present invention relates to a post-construction anchor and a construction method thereof, for example, a post-construction anchor fixed to an existing structure for seismic reinforcement and a construction method thereof.

後施工アンカーは、既存の建築物などの構造物に対して耐震補強したりするのに用いられる。後施工アンカーとしては、例えば特許文献１に開示されるものがある。   Post-installed anchors are used for seismic reinforcement of structures such as existing buildings. As post-construction anchors, there is one disclosed in Patent Document 1, for example.

後施工アンカーを用いて耐震補強するにあたっては、例えばマンションの柱や梁などの鉄筋鉄骨コンクリートなどの母材に穿孔部を設けた後、後施工アンカーを用い、前記後施工アンカーの一部が外部に突出するようにして前記穿孔部に後施工アンカーを挿入し、前記穿孔部内に接着剤など充填して前記後施工アンカーを固定する。そして、前記後施工アンカーが埋設されるように、その上に新設の補強コンクリートを打設するなどして耐震補強する。   For retrofitting seismic reinforcement using post-construction anchors, for example, after providing a perforated part in a base material such as reinforced concrete such as a condominium pillar or beam, post-construction anchors are used, and a part of the post-construction anchor is external The post-construction anchor is inserted into the perforated part so as to protrude, and an adhesive or the like is filled in the perforated part to fix the post-construction anchor. And, as the post-construction anchor is buried, it is seismically reinforced by placing a new reinforced concrete on the anchor.

したがって、コンクリートなどの母材に形成する穿孔部は深く、且つそこに挿入する後施工アンカーも長い方が強度が出るし、引き抜き抵抗が大きくなるため好ましいのである。   Therefore, it is preferable that the perforated portion formed in the base material such as concrete is deep and the post-installed anchor inserted into the base is longer in strength and the pull-out resistance is increased.

しかしながら、構造物によっては、柱や梁或いは壁が薄かったりして、コンクリートなどの母材に形成する穿孔部をあまり深くすることができず、後施工アンカーも長いものを使用できない場合があるといった問題があった。   However, depending on the structure, pillars, beams, or walls may be thin, so that the perforated part formed in the base material such as concrete cannot be made too deep, and the post-installed anchor may not be used long. There was a problem.

また、地震の際には、上記のように固定した後施工アンカーに対してせん断力が働くが、接着剤などで固定された後施工アンカーは、接着剤が異種材料であるために、コンクリートとの一体性が難しく、せん断力と引き抜き力に対して弱いという問題があった。   In addition, in the event of an earthquake, a shear force acts on the post-construction anchor fixed as described above, but the post-construction anchor fixed with an adhesive, etc. There is a problem that the unity is not easy and is weak against shearing force and pulling force.

特開平１０−２９２４９４JP-A-10-292494

本発明は、上記従来技術の問題点に鑑みなされたもので、構造物の母材に形成する穿孔部を従来よりも浅くすることができ、且つ後施工アンカーの長さを従来よりも短くすることができ、さらに、地震の際のせん断力に対して強い後施工アンカー及びその施工方法を提供することを目的とする。   The present invention has been made in view of the above-described problems of the prior art, and can make the perforated portion formed in the base material of the structure shallower than the conventional one, and shorten the length of the post-installed anchor than the conventional one. Furthermore, it aims at providing the post-installation anchor strong against the shear force in the case of an earthquake, and its construction method.

本発明の後施工アンカーは、アンカー本体部の一部が外部に突出した状態で、母材の穿孔部に挿入せしめ、セメントモルタルを前記アンカー本体部と前記穿孔部との隙間に充填し、前記突出した一部を補強コンクリートで埋設固定してなる後施工アンカーであって、アンカー本体部と、前記アンカー本体部の長手方向両端に設けられた径大端部と、を有してなることを特徴とする。   The post-construction anchor of the present invention is inserted into the drilled portion of the base material with a part of the anchor main body protruding to the outside, and cement mortar is filled in the gap between the anchor main body and the drilled portion, It is a post-construction anchor formed by embedding and fixing a protruding part with reinforced concrete, and has an anchor main body part and large-diameter end parts provided at both longitudinal ends of the anchor main body part. Features.

このように、前記アンカー本体部の長手方向少なくとも両端に径大端部を設けることで、引き抜き抵抗が増大し、且つせん断力に対して、支圧効果が発揮される。   Thus, by providing the large diameter end portions at least at both ends in the longitudinal direction of the anchor main body portion, the pull-out resistance is increased and a bearing effect is exerted against the shearing force.

本発明では、セメントモルタルを前記アンカー本体部と前記穿孔部との隙間に充填するため、コンクリートと一体化させることができ、せん断力と引き抜き力に対して強くなる。前記セメントモルタルとしては、流動性の高い無収縮のセメントモルタルが好適である。セメントモルタルに鉄粉を入れることで無収縮セメントモルタルとすることができる。   In the present invention, the cement mortar is filled in the gap between the anchor main body portion and the perforated portion, so that it can be integrated with concrete and is strong against shearing force and pulling force. As the cement mortar, non-shrinkable cement mortar with high fluidity is suitable. Non-shrinkable cement mortar can be made by putting iron powder in cement mortar.

前記径大端部としては、環状の径大端部が好ましい。   As the large diameter end portion, an annular large diameter end portion is preferable.

前記アンカー本体部の長さＬと前記アンカー本体部の直径ｄが以下の関係式（１）を満たすことが好ましい。
Ｌ＝４ｄ〜８ｄ …（１） It is preferable that the length L of the anchor main body and the diameter d of the anchor main body satisfy the following relational expression (1).
L = 4d-8d (1)

また、前記アンカー本体部の長手方向中間に径大中間部を設けてなるのが好適である。前記径大中間部としては、環状の径大中間部が好ましい。   In addition, it is preferable that a large-diameter intermediate portion is provided in the middle in the longitudinal direction of the anchor main body portion. As the large diameter intermediate portion, an annular large diameter intermediate portion is preferable.

前記径大中間部を設けることで、せん断力に対して、さらなる支圧効果が発揮される。また、母材に設けた穿孔部に後施工アンカーを挿入した際に、蓋の役目も果たす。   By providing the large diameter intermediate portion, a further bearing effect is exhibited against the shearing force. Moreover, when the post-construction anchor is inserted into the perforated portion provided in the base material, it also serves as a lid.

前記径大中間部の直径が前記径大端部の直径よりも大きいのが好適である。   It is preferable that the diameter of the large diameter intermediate portion is larger than the diameter of the large diameter end portion.

前記径大中間部に複数の切り欠き部を設けてなるのが好適である。例えば前記径大中間部の二箇所に切り欠き部を設けておけば、一箇所の切り欠き部から前記セメントモルタルを注入し、もう一箇所の切り欠き部からは穿孔部内部の空気及びセメントモルタルが抜けて、前記セメントモルタルを前記アンカー本体部と前記穿孔部との隙間に充填しやすくなる。   It is preferable to provide a plurality of notches in the large diameter intermediate portion. For example, if a notch is provided at two locations in the large diameter intermediate portion, the cement mortar is injected from one notch, and the air inside the perforated portion and cement mortar are injected from the other notch. And the cement mortar is easily filled in the gap between the anchor main body portion and the perforated portion.

前記アンカー本体部並びに前記径大端部及び前記径大中間部の材質としては、鋼材、ステンレス鋼、プラスチック、セラミック、ＦＲＰ（繊維強化プラスチック）、ＣＦＲＰ（炭素繊維強化プラスチック）などが使用できる。   As the material of the anchor main body part, the large-diameter end part, and the large-diameter intermediate part, steel, stainless steel, plastic, ceramic, FRP (fiber reinforced plastic), CFRP (carbon fiber reinforced plastic), or the like can be used.

本発明の後施工アンカーの施工方法は、アンカー本体部の一部が外部に突出した状態で母材の穿孔部に挿入せしめ、前記アンカー本体部と前記穿孔部との隙間にセメントモルタルを充填し、前記突出した一部を補強コンクリートで埋設固定してなることを特徴とする。   According to the post-installation anchor construction method of the present invention, a part of the anchor main body part is protruded to the outside, and is inserted into the perforated part of the base material, and the gap between the anchor main body part and the perforated part is filled with cement mortar. The protruding part is embedded and fixed with reinforced concrete.

また、前記後施工アンカーが、前記アンカー本体部の長手方向中間に設けられた径大中間部を有し、前記穿孔部が、開口部付近が径大とされた径大開口部を有し、前記後施工アンカーの前記径大中間部が、前記径大開口部の近傍に位置するように、前記突出した一部を補強コンクリートで埋設固定してなるのが好ましい。   Further, the post-construction anchor has a large-diameter intermediate portion provided in the middle in the longitudinal direction of the anchor main body, and the perforated portion has a large-diameter opening in which the vicinity of the opening is large in diameter, It is preferable that the protruding part is embedded and fixed with reinforced concrete so that the large-diameter intermediate portion of the post-construction anchor is positioned in the vicinity of the large-diameter opening.

本発明によれば、構造物の母材に形成する穿孔部を従来よりも浅くすることができ、且つ後施工アンカーの長さを従来よりも短くすることができ、さらに、地震の際のせん断力に対して強い後施工アンカー及びその施工方法を提供することができるという著大な効果が達成される。   According to the present invention, the drilled portion formed in the base material of the structure can be made shallower than before, the length of the post-installed anchor can be made shorter than before, and further, the shear in the event of an earthquake The remarkable effect that the post-installation anchor strong against the force and the construction method thereof can be provided is achieved.

本発明の後施工アンカーの一つの実施の形態を示す斜視図である。It is a perspective view which shows one embodiment of the post-installation anchor of this invention. 本発明の後施工アンカーの一つの実施の形態を示す図であって、（ａ）が後施工アンカーの側面図、（ｂ）が径大中間部の平面図である。It is a figure which shows one embodiment of the post-construction anchor of this invention, Comprising: (a) is a side view of a post-construction anchor, (b) is a top view of a large diameter intermediate part. 本発明の後施工アンカーの施工方法を示す模式一部水平断面図であって、（ａ）が母材に穿孔部を設けたところ、（ｂ）が穿孔部に径大開口部を形成したところ、（ｃ）が本発明の後施工アンカーを挿入したところ、を示す。It is the model partial horizontal sectional view which shows the construction method of the post-installation anchor of this invention, Comprising: When (a) provided the perforated part in the base material, (b) When the large diameter opening part was formed in the perforated part (C) shows that the post-construction anchor of the present invention has been inserted. 図３（ｃ）の状態から、補強コンクリートを打設したところを示す模式一部水平断面図である。It is a model partial horizontal sectional view which shows the place which reinforced concrete was laid from the state of FIG.3 (c). 本発明の後施工アンカーの別の実施の形態を示す斜視図である。It is a perspective view which shows another embodiment of the post-installation anchor of this invention. 本発明の後施工アンカーの他の実施の形態を示す斜視図である。It is a perspective view which shows other embodiment of the post-installation anchor of this invention.

以下に本発明の実施の形態を添付図面に基づいて説明するが、図示例は例示的に示されたもので、本発明の技術的思想から逸脱しない限り種々の変形が可能なことは言うまでもない。   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. However, the illustrated examples are shown by way of example, and it goes without saying that various modifications can be made without departing from the technical idea of the present invention. .

図１〜図４において、符号１０Ａは、本発明の後施工アンカーの一つの実施の形態を示す。   1-4, the code | symbol 10A shows one Embodiment of the post-installation anchor of this invention.

後施工アンカー１０Ａは、アンカー本体部１２Ａと、前記アンカー本体部１２Ａの長手方向少なくとも両端に設けられた径大端部１４ａ，１４ｂと、を有している。   The post-installed anchor 10A includes an anchor main body portion 12A and large-diameter end portions 14a and 14b provided at least at both ends in the longitudinal direction of the anchor main body portion 12A.

後施工アンカー１０Ａのアンカー本体部１２Ａとしては、表面に小さな複数の凸部１６が形成された異形アンカー本体部とされている。そして、前記アンカー本体部１２Ａの長手方向中間には径大中間部１８が設けられている。   The anchor main body 12A of the post-installed anchor 10A is a deformed anchor main body having a plurality of small convex portions 16 formed on the surface. A large-diameter intermediate portion 18 is provided in the middle in the longitudinal direction of the anchor main body portion 12A.

また、前記径大中間部１８の直径Ｄ２は、前記径大端部１４ａ，１４ｂの直径Ｄ１よりも大きい構成とされている。より具体的には、前記径大中間部１８の直径Ｄ２は、４５ｍｍ、前記径大端部１４ａ，１４ｂの直径Ｄ１は３０ｍｍの例を示した。   The large diameter intermediate portion 18 has a diameter D2 larger than the diameter D1 of the large diameter end portions 14a and 14b. More specifically, the diameter D2 of the large diameter intermediate portion 18 is 45 mm, and the diameter D1 of the large diameter end portions 14a and 14b is 30 mm.

図示例では、前記アンカー本体部１２Ａ並びに前記径大端部１４ａ，１４ｂ及び前記径大中間部１８の材質としては、鋼材を使用した例を示した。   In the illustrated example, as the material of the anchor main body portion 12A, the large diameter end portions 14a and 14b, and the large diameter intermediate portion 18, an example in which a steel material is used is shown.

また、図示例では、図２（ａ）によく示される如く、前記アンカー本体部１２Ａの長さＬと前記アンカー本体部１２Ａの直径ｄが、Ｌ＝８ｄとされている。より具体的には、前記アンカー本体部１２Ａの長さＬは１６０ｍｍであり、前記アンカー本体部１２Ａの直径ｄは２０ｍｍとした例を示した。なお、図示例では、前記アンカー本体部１２Ａの長さＬの半分、即ち１／２Ｌの箇所に前記径大中間部１８を設けた例を示した。   Further, in the illustrated example, as well shown in FIG. 2A, the length L of the anchor main body 12A and the diameter d of the anchor main body 12A are L = 8d. More specifically, the length L of the anchor main body 12A is 160 mm, and the diameter d of the anchor main body 12A is 20 mm. In the illustrated example, an example in which the large diameter intermediate portion 18 is provided at a half of the length L of the anchor main body portion 12A, that is, at a position of 1 / 2L is shown.

また、本発明においては、前記径大端部１４ａ，１４ｂの直径Ｄ１と、前記アンカー本体部１２Ａの直径ｄが以下の関係式（２）を満たすのが好ましい。
Ｄ１＝１．５ｄ〜３ｄ …（２） In the present invention, it is preferable that the diameter D1 of the large diameter end portions 14a and 14b and the diameter d of the anchor main body portion 12A satisfy the following relational expression (2).
D1 = 1.5d-3d (2)

さらに、本発明においては、前記径大中間部１８の直径Ｄ２と、前記アンカー本体部１２Ａの直径ｄが以下の関係式（３）を満たすのが好ましい。
Ｄ２＝１．５ｄ〜５ｄ …（３） Furthermore, in the present invention, it is preferable that the diameter D2 of the large diameter intermediate portion 18 and the diameter d of the anchor main body portion 12A satisfy the following relational expression (3).
D2 = 1.5d to 5d (3)

前記径大中間部１８には、図２（ｂ）によく示される如く、複数の切り欠き部２０ａ，２０ｂ（図示例では二箇所）が設けられている。   As shown in FIG. 2B, the large diameter intermediate portion 18 is provided with a plurality of notches 20a and 20b (two locations in the illustrated example).

次に、後施工アンカー１０Ａを用いた後施工アンカーの施工方法を、図３及び図４に基づいて説明する。   Next, a post-construction anchor construction method using the post-construction anchor 10A will be described with reference to FIGS.

まず、マンションの柱や梁などの鉄筋鉄骨コンクリートなどの母材２２にドリル２４で穿孔部２６を設ける（図３（ａ））。図３及び図４の図示例では、母材２２はマンションの柱の水平断面図となっている。   First, a perforated portion 26 is provided with a drill 24 in a base material 22 such as a reinforced steel concrete such as a column or beam of an apartment (FIG. 3A). 3 and 4, the base material 22 is a horizontal sectional view of a condominium pillar.

次に、穿孔部２６の開口部付近に、太いドリル２８で径大開口部３０を形成する（図３（ｂ））。   Next, a large-diameter opening 30 is formed with a thick drill 28 in the vicinity of the opening of the perforated part 26 (FIG. 3B).

そして、アンカー本体部１２Ａの一部が外部に突出した状態で母材の穿孔部２６に挿入せしめ、前記アンカー本体部１２Ａと前記穿孔部２６との隙間にセメントモルタル３２を充填する（図３（ｃ））。図示例では、無収縮のセメントモルタルを使用した。   Then, the anchor main body 12A is inserted into the base material perforated portion 26 in a state where a part of the anchor main body 12A protrudes to the outside, and the gap between the anchor main body 12A and the perforated portion 26 is filled with cement mortar 32 (FIG. 3 ( c)). In the illustrated example, non-shrinkage cement mortar was used.

その後、図４の水平断面図によく示される如く、外部に突出したアンカー本体部１２Ａを覆うように鋼板リブ３４と補強筋３６を組んで、そこに補強コンクリート３８を打設して、前記アンカー本体部１２Ａの突出した一部を埋設固定する（図４）。   Thereafter, as well shown in the horizontal sectional view of FIG. 4, a steel plate rib 34 and a reinforcing bar 36 are assembled so as to cover the anchor main body 12A protruding to the outside, and reinforced concrete 38 is placed there, and the anchor The protruding part of the main body 12A is embedded and fixed (FIG. 4).

このようにして、本発明の後施工アンカー１０Ａを施工することができる。   In this way, the post-construction anchor 10A of the present invention can be constructed.

なお、図３及び図４の例では、後施工アンカー１０Ａとして、拡底ではない後施工アンカーで施工した例を示したが、穿孔部２６を拡底穿孔部とし、後施工アンカー１０Ａとして、その先端が拡底するタイプの拡底後施工アンカーを使用してもよい。   In the examples of FIGS. 3 and 4, an example in which the post-construction anchor 10A is constructed by using a post-construction anchor that is not widened is shown. A post-bottom construction anchor of the type that widens the bottom may be used.

図５に、本発明の後施工アンカーの別の実施の形態を示す。   FIG. 5 shows another embodiment of the post-installed anchor of the present invention.

後施工アンカー１０Ｂは、アンカー本体部１２Ｂと、前記アンカー本体部１２Ｂの長手方向少なくとも両端に設けられた径大端部１４ａ，１４ｂと、を有している。   The post-installed anchor 10B has an anchor main body portion 12B and large diameter end portions 14a and 14b provided at least at both ends in the longitudinal direction of the anchor main body portion 12B.

後施工アンカー１０Ｂのアンカー本体部１２Ｂとしては、表面に凸部のない直胴型のアンカー本体部とされている。そして、前記アンカー本体部１２Ｂの長手方向中間には径大中間部１８が設けられており、前記径大中間部１８には複数の切り欠き部２０ａ，２０ｂ（図示例では二箇所）が設けられている。また、前記径大中間部１８の直径は、前記径大端部１４ａ，１４ｂの直径よりも大きい構成とされている。   The anchor main body portion 12B of the post-installed anchor 10B is a straight barrel type anchor main body portion having no convex portion on the surface. A large-diameter intermediate portion 18 is provided in the middle of the anchor body portion 12B in the longitudinal direction, and the large-diameter intermediate portion 18 is provided with a plurality of notches 20a and 20b (two locations in the illustrated example). ing. The large diameter intermediate portion 18 has a larger diameter than the large diameter end portions 14a and 14b.

後施工アンカー１０Ｂの長さＬと前記アンカー本体部１２Ｂの直径ｄは、後施工アンカー１０Ａの場合と同様に、Ｌ＝８ｄとされている。また、後施工アンカー１０Ａの場合と同様に、前記アンカー本体部１２Ｂの長さＬの半分、即ち１／２Ｌの箇所に前記径大中間部１８を設けた例を示した。   The length L of the post-construction anchor 10B and the diameter d of the anchor main body 12B are set to L = 8d, as in the case of the post-construction anchor 10A. Further, as in the case of the post-installed anchor 10A, an example in which the large diameter intermediate portion 18 is provided at a half of the length L of the anchor main body portion 12B, that is, at a position of 1 / 2L is shown.

後施工アンカー１０Ｂは、上述したように、後施工アンカー１０Ａと同様に施工することが可能である。   As described above, the post-construction anchor 10B can be constructed in the same manner as the post-construction anchor 10A.

また、図６に、本発明の後施工アンカーの他の実施の形態を示す。   FIG. 6 shows another embodiment of the post-installed anchor of the present invention.

後施工アンカー１０Ｃは、アンカー本体部１２Ｃと、前記アンカー本体部１２Ｃの長手方向少なくとも両端に設けられた径大端部１４ａ，１４ｂと、を有している。   The post-installed anchor 10C includes an anchor main body portion 12C and large diameter end portions 14a and 14b provided at least at both ends in the longitudinal direction of the anchor main body portion 12C.

後施工アンカー１０Ｃのアンカー本体部１２Ｃとしては、表面に小さな複数の凸部１６が形成された異形アンカー本体部とされている。そして、前記アンカー本体部１２Ｃの長手方向中間には、上述した後施工アンカー１０Ａ及び後施工アンカー１０Ｂとは異なり、径大中間部は設けられていない。   The anchor main body 12C of the post-installed anchor 10C is a deformed anchor main body having a plurality of small convex portions 16 formed on the surface. Unlike the post-construction anchor 10A and the post-construction anchor 10B described above, a large diameter intermediate portion is not provided in the middle in the longitudinal direction of the anchor main body 12C.

後施工アンカー１０Ｃの長さＬと前記アンカー本体部１２Ｃの直径ｄは、後施工アンカー１０Ａの場合と同様に、Ｌ＝８ｄとされている。   The length L of the post-construction anchor 10C and the diameter d of the anchor main body 12C are set to L = 8d, as in the case of the post-construction anchor 10A.

後施工アンカー１０Ｃは、上述した後施工アンカー１０Ａ及び後施工アンカー１０Ｂと比べると、せん断力に対する支圧効果は減少するが、後施工アンカー１０Ａや後施工アンカー１０Ｂと同様に施工することが可能である。   The post-construction anchor 10C can be constructed in the same manner as the post-construction anchor 10A and the post-construction anchor 10B, although the effect of supporting the shear force is reduced as compared with the post-construction anchor 10A and the post-construction anchor 10B described above. is there.

後施工アンカー１０Ｃを施工する場合には、図３に示されるような、上述した径大開口部３０を形成する必要はなく、母材２２の穿孔部２６にアンカー本体部１２Ｃの一部が外部に突出した状態で穿孔部２６に挿入せしめ、前記アンカー本体部１２Ｃと前記穿孔部２３との隙間にセメントモルタル３２を充填し、前記突出した一部を補強コンクリート３８で埋設固定するようにすればよい。   When constructing the post-installed anchor 10C, it is not necessary to form the large-diameter opening 30 as shown in FIG. 3, and a part of the anchor main body 12C is externally provided in the perforated part 26 of the base material 22. So that the gap between the anchor main body 12C and the perforated part 23 is filled with cement mortar 32, and the projected part is embedded and fixed with reinforced concrete 38. Good.

上記のようにすれば、構造物の母材に形成する穿孔部を従来よりも浅くすることができ、且つ後施工アンカーの長さを従来よりも短くすることができ、さらに、地震の際のせん断力に対して強い後施工アンカー及びその施工方法となる。   If it does as mentioned above, the drilling part formed in the base material of a structure can be made shallower than before, and the length of post-installation anchor can be made shorter than before, and also in the case of an earthquake It becomes the post-installation anchor strong against a shearing force and its construction method.

１０Ａ，１０Ｂ，１０Ｃ：後施工アンカー、１２Ａ，１２Ｂ，１２Ｃ：アンカー本体部、１４ａ，１４ｂ：径大端部、１６：複数の凸部、１８：径大中間部、２０ａ，２０ｂ：切り欠き部、２２：母材、２４：ドリル、２６：穿孔部、２８：太いドリル、３０：径大開口部、３２：セメントモルタル、３４：鋼板リブ、３６：補強筋、３８：補強コンクリート、ｄ：アンカー本体部の直径、Ｄ１：径大端部の直径、Ｄ２：径大中間部の直径、Ｌ：アンカー本体部の長さ。 10A, 10B, 10C: Post-installed anchor, 12A, 12B, 12C: Anchor main body part, 14a, 14b: Large diameter end part, 16: Plural convex part, 18: Large diameter intermediate part, 20a, 20b: Notch part , 22: base material, 24: drill, 26: drilled portion, 28: thick drill, 30: large diameter opening, 32: cement mortar, 34: steel plate rib, 36: reinforcing bar, 38: reinforced concrete, d: anchor Diameter of main body part, D1: Diameter of large diameter end part, D2: Diameter of large diameter middle part, L: Length of anchor main body part.

本発明の後施工アンカーは、アンカー本体部の一部が外部に突出した状態で、母材に形成した開口部付近に径大開口部を有する穿孔部に挿入せしめ、セメントモルタルを前記アンカー本体部と前記穿孔部との間隙に充填し、前記突出した一部を補強コンクリートで埋設固定してなる後施工アンカーであって、表面に複数の凸部を形成したアンカー本体部と、前記アンカー本体部の長手方向両端に設けられた径大端部と、前記アンカー本体部の長手中間に設けら前記穿孔部の径大開口部に位置し前記径大端部より大径で複数の切り欠き部を形成した径大中間部と、を有してなることを特徴とする。 The post-installed anchor of the present invention is inserted into a perforated portion having a large-diameter opening near the opening formed in the base material in a state in which a part of the anchor main body protrudes to the outside, and cement mortar is added to the anchor main body. A post-installed anchor in which the protruding part is embedded and fixed with reinforced concrete, the anchor main body having a plurality of convex portions formed on the surface thereof, and the anchor main body A large-diameter end provided at both ends in the longitudinal direction of the anchor, and a plurality of notches having a diameter larger than that of the large-diameter end located at the large-diameter opening of the drilled portion provided in the middle of the anchor main body. And a large-diameter intermediate portion formed .

本発明の後施工アンカーは、アンカー本体部の一部が外部に突出した状態で、母材に形成した開口部付近に径大開口部を有する穿孔部に挿入せしめ、セメントモルタルを前記アンカー本体部と前記穿孔部との間隙に充填し、前記突出した一部を補強コンクリートで埋設固定してなる後施工アンカーであって、表面に複数の凸部を形成したアンカー本体部と、前記アンカー本体部の長手方向両端に設けられた径大端部と、前記アンカー本体部の長手方向中間に設けられ、前記穿孔部の径大開口部に位置し前記径大端部より大径で複数の切り欠き部を形成した径大中間部と、を有してなることを特徴とする。 The post-installed anchor of the present invention is inserted into a perforated portion having a large-diameter opening near the opening formed in the base material in a state in which a part of the anchor main body protrudes to the outside, and cement mortar is added to the anchor main body. A post-installed anchor in which the protruding part is embedded and fixed with reinforced concrete, the anchor main body having a plurality of convex portions formed on the surface thereof, and the anchor main body longitudinal and opposite end large-diameter end portion provided in the anchor body portion longitudinally intermediate the provided et al are of a plurality of cut large diameter than the large-diameter end portion located in the large-diameter opening of the perforated part of the And a large-diameter intermediate portion in which a notch portion is formed.

Claims (7)

アンカー本体部の一部が外部に突出した状態で、母材の穿孔部に挿入せしめ、セメントモルタルを前記アンカー本体部と前記穿孔部との隙間に充填し、前記突出した一部を補強コンクリートで埋設固定してなる後施工アンカーであって、
アンカー本体部と、
前記アンカー本体部の長手方向両端に設けられた径大端部と、
を有してなることを特徴とする後施工アンカー。 With a part of the anchor main body protruding to the outside, it is inserted into the perforated part of the base material, cement mortar is filled in the gap between the anchor main body part and the perforated part, and the protruding part is made of reinforced concrete. It is a post-construction anchor that is buried and fixed,
An anchor body,
Large-diameter end portions provided at both longitudinal ends of the anchor main body, and
A post-construction anchor characterized by comprising: 前記アンカー本体部の長さＬと前記アンカー本体部の直径ｄが以下の関係式（１）を満たすことを特徴とする請求項１記載の後施工アンカー。
Ｌ＝４ｄ〜８ｄ …（１） The post-construction anchor according to claim 1, wherein the length L of the anchor main body and the diameter d of the anchor main body satisfy the following relational expression (1).
L = 4d-8d (1) 前記アンカー本体部の長手方向中間に径大中間部を設けてなることを特徴とする請求項１又は２記載の後施工アンカー。   The post-installed anchor according to claim 1 or 2, wherein a large-diameter intermediate portion is provided in the middle in the longitudinal direction of the anchor main body portion. 前記径大中間部の直径が前記径大端部の直径よりも大きいことを特徴とする請求項３記載の後施工アンカー。   The post-construction anchor according to claim 3, wherein a diameter of the large diameter intermediate portion is larger than a diameter of the large diameter end portion. 前記径大中間部に複数の切り欠き部を設けてなることを特徴とする請求項３又は４記載の後施工アンカー。   The post-construction anchor according to claim 3 or 4, wherein a plurality of cutout portions are provided in the large diameter intermediate portion. 請求項１〜５いずれか１項記載の後施工アンカーを、アンカー本体部の一部が外部に突出した状態で母材の穿孔部に挿入せしめ、前記アンカー本体部と前記穿孔部との隙間にセメントモルタルを充填し、前記突出した一部を補強コンクリートで埋設固定してなる後施工アンカーの施工方法。   The post-installed anchor according to any one of claims 1 to 5, wherein a part of the anchor main body part is protruded to the outside and is inserted into a perforated part of a base material, and the gap between the anchor main body part and the perforated part is inserted. A method for constructing a post-construction anchor, which is filled with cement mortar and the projecting part is buried and fixed with reinforced concrete. 前記後施工アンカーが、前記アンカー本体部の長手方向中間に設けられた径大中間部を有し、前記穿孔部が、開口部付近が径大とされた径大開口部を有し、前記後施工アンカーの前記径大中間部が、前記径大開口部の近傍に位置するように、前記突出した一部を補強コンクリートで埋設固定してなる請求項６記載の後施工アンカーの施工方法。   The post-installed anchor has a large-diameter intermediate portion provided in the middle in the longitudinal direction of the anchor main body, and the perforated portion has a large-diameter opening having a large diameter in the vicinity of the opening. The post-construction anchor construction method according to claim 6, wherein the protruding part is embedded and fixed with reinforced concrete so that the large-diameter intermediate portion of the construction anchor is positioned in the vicinity of the large-diameter opening.
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