JP5044819B2 - Anchor anchorage - Google Patents

Anchor anchorage Download PDF

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JP5044819B2
JP5044819B2 JP2008000471A JP2008000471A JP5044819B2 JP 5044819 B2 JP5044819 B2 JP 5044819B2 JP 2008000471 A JP2008000471 A JP 2008000471A JP 2008000471 A JP2008000471 A JP 2008000471A JP 5044819 B2 JP5044819 B2 JP 5044819B2
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hole
steel wire
anchor
fixing tool
outer cylinder
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JP2009161981A (en
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福来治
高橋洋子
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野崎 力
福来 治
Deワークプロブ株式会社
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Description

本発明は、地中に複数の耐荷体を設置して行うアンカーにおいて、耐荷体を定着させるための定着具に関するものである。
The present invention relates to a fixing tool for fixing a load-bearing body in an anchor formed by installing a plurality of load-bearing bodies in the ground.

従来から、図5の特公平5−30932号公報示すように、複数の耐荷体aを地中に設置し、各耐荷体aごとにPC鋼線bを配置し、その地表への露出端をジャッキによって緊張して構成するアンカー工法が開発されている。   Conventionally, as shown in Japanese Patent Publication No. 5-30932 in FIG. 5, a plurality of load-bearing bodies a are installed in the ground, PC steel wires b are arranged for each load-bearing body a, and the exposed end to the ground surface is defined. An anchor construction method has been developed in which it is tensioned by a jack.

上記のような従来の除去式アンカーにあっては、耐荷体aの数に応じてPC鋼線bの本数が増え、しかもUターンをさせるから2倍の本数のPC鋼線bをアンカー孔内に配置する必要があるという問題があった。
したがって直径の小さいアンカー孔においては、利用できる耐荷体aの数が限られていた。
さらに、複数本のPC鋼線bはそれぞれ長さが異なるために特殊な緊張の方法が必要であった。
その理由は、もしジャッキによってすべてのPC鋼線bを同一の距離だけ緊張すると、短いPC鋼線bには大きな緊張力が導入され、長いPC鋼線bには少ない緊張力が導入されることになる。
しかし複数本のPC鋼線bが一体となってアンカーとして作用するのであるから、一部のPC鋼線bに大きな緊張力が作用するのではなく、すべてのPC鋼線bには等しい緊張力が導入されることが望ましい。
そのための解決方法として、緊張前に第1、第2、第3の各PC鋼線bの伸びをあらかじめ算定しておく方法がある。
そしてまず各PC鋼線bの伸びの差分を緊張し、すべてをそろえた後に順次各PC鋼線bを緊張するような方法である。
しかしこの方法では、伸びの差分を緊張するためには、各PC鋼線bごとに色違いの目印を付けるなどの区別が必要になる。
この色違いの表示は、オイルや泥で汚れると不鮮明になりやすく、薄暗い現場で、PC鋼線bを識別して正確に決められた順序にしたがって緊張してゆくという作業は、現場でのわずらわしい管理が必要となる。
In the conventional removable anchor as described above, the number of PC steel wires b increases according to the number of load bearing bodies a, and a U-turn is made. There was a problem that had to be placed in.
Therefore, in the anchor hole having a small diameter, the number of load bearing bodies a that can be used is limited.
Furthermore, since a plurality of PC steel wires b have different lengths, a special tension method is required.
The reason is that if all the PC steel wires b are tensioned by the same distance by the jack, a large tension force is introduced into the short PC steel wires b and a small tension force is introduced into the long PC steel wires b. become.
However, since a plurality of PC steel wires b are integrated and act as anchors, a large tension force does not act on some PC steel wires b, but an equal tension force on all PC steel wires b. Is preferably introduced.
As a solution for that, there is a method of calculating in advance the elongation of each of the first, second and third PC steel wires b before tension.
Then, first, the difference in the elongation of each PC steel wire b is tensioned, and after all are aligned, each PC steel wire b is tensioned sequentially.
However, in this method, in order to tension the difference in elongation, it is necessary to make a distinction such as marking each PC steel wire b with a different color.
This display of different colors tends to be unclear when dirty with oil or mud, and the work of identifying the PC steel wires b in a dimly lit site and tensing them in a precisely determined order is troublesome at the site. Management is required.

上記のような問題を解決するために本件出願人によって、[特許文献1]に示すような工法が提案されている。
この工法を図6に示すと、その特徴は、1本のPC鋼線bに、複数の耐荷体aを取り付けることができ、かつPC鋼線bの伸びの差を簡単に熟練を要せずに調整することができる点で多くの特徴を備えている。
特開2007−177485号公報。
In order to solve the above problems, the present applicant has proposed a construction method as shown in [Patent Document 1].
When this construction method is shown in FIG. 6, the feature is that a plurality of load-bearing bodies a can be attached to one PC steel wire b, and the difference in elongation of the PC steel wire b is not required to be skillful. It has many features in that it can be adjusted.
JP2007-177485A.

図6に示す特許文献1に記載した発明は、それまでの工法、すなわち図5に示すような工法と比較すると、1本のPC鋼線bに複数個の耐荷体aを取付られるという特徴を備えており、かつ耐荷体aの位置ごとに相違するPC鋼線bの伸びの差を簡単に調整できるという特徴も備えている。
しかし図6に示したように、耐荷体aはPC鋼線bに取り付けた定着具cを介して、定着具cとは別に取り付けなければならない、という作業上の非効率の問題があった。
The invention described in Patent Document 1 shown in FIG. 6 is characterized in that a plurality of load bearing bodies a can be attached to one PC steel wire b as compared with the conventional method, that is, the method as shown in FIG. It also has the feature that the difference in elongation of the PC steel wire b that differs for each position of the load bearing body a can be easily adjusted.
However, as shown in FIG. 6, there is a problem of work inefficiency that the load bearing body a must be attached separately from the fixing tool c via the fixing tool c attached to the PC steel wire b.

また本発明のアンカーの定着方法は、前項のアンカーの定着具を複数個使用し、複数の定着具を取り付けたPC鋼線をアンカー孔内に挿入するに際して、定着具の配置位置によって、調整スペーサーの枚数を、孔口側の定着具では少なく、孔底側の定着具では多く配置して1本のPC鋼線に取り付けてアンカー孔内に挿入し、さらに孔内へ硬化剤を注入し、硬化剤の硬化後に、
PC鋼線を孔外から緊張して行うことを特徴としたものである。
The anchor fixing method of the present invention uses a plurality of anchor fixing tools as described above, and when inserting a PC steel wire with a plurality of fixing tools into the anchor hole, an adjustment spacer is used depending on the arrangement position of the fixing tools. The number of the fixing holes on the hole side is small, and the number on the bottom side fixing tool is arranged and attached to one PC steel wire and inserted into the anchor hole, and further the curing agent is injected into the hole, After curing the curing agent,
It is characterized in that the PC steel wire is tensioned from outside the hole.

また本発明のアンカーの定着方法は、前項のアンカーの定着具を複数個使用し、複数の定着具を取り付けたPC鋼線をアンカー孔内に挿入するに際して、定着具の配置位置によって、調整スペーサーの枚数を変えて1本のPC鋼線に取り付けてアンカー孔内に挿入し、さらに孔内へ硬化剤を注入し、硬化剤の硬化後に、PC鋼線を孔外から緊張して行うことを特徴としたものである。
The anchor fixing method of the present invention uses a plurality of anchor fixing tools as described above, and when inserting a PC steel wire with a plurality of fixing tools into the anchor hole, an adjustment spacer is used depending on the arrangement position of the fixing tools. It is attached to one PC steel wire by changing the number of steel sheets, inserted into the anchor hole, and a hardening agent is injected into the hole, and after hardening of the hardening agent, the PC steel wire is tensioned from outside the hole. It is a feature.

本発明のアンカーの定着具は以上説明したようになるから、図5.6に示したような従来の工法に比較して少なくとも次のような効果のひとつ以上を期待することができる。
<1>1本のPC鋼線に複数の耐荷体を取り付ける工法であるが、さらに定着具の取り付けと同時に耐荷体の取り付けを完了することができるので、きわめて組み立て作業の効率のよい。
<2>1本のPC鋼線を1箇所のジャッキで緊張した場合に、複数個所の定着具の内部で、PC鋼線の伸びの差を調整することができ、短い部分のPC鋼線にのみ大きな緊張力が作用するような不都合が生じない。
<3>図5に示すような従来の工法では複数個所に耐荷体を配置する場合には、狭いアンカー孔の内部に複数本のPC鋼線を挿入する必要があった。しかし本発明の構成、方法によれば、アンカー孔の内部の配置するのはPC鋼線はたった1本だけである。1本のPC鋼線によって複数個所に耐荷体を配置したアンカーを設置できる。したがって削孔の直径を小さくすることができ、きわめて経済的である。
<4>ジャッキによる1回の緊張だけで、異なる位置に配置したPC鋼線の複数個所の定着具の緊張定着を行うことができるから作業の時間を大幅に短縮することもできる。
<5>特許文献1に記載された発明に比較して、調整寸法を調整スペーサーの枚数で決めればよいから、微妙な調整が不要であって作業員の熟練を要せず、信頼性が高いアンカーの構造を得ることができる。
<6>さらに特許文献1に記載された発明に比較して、調整に要する部品は安価なワッシャータイプの鋼板であるから、経済的である。
<7>耐荷体はその周囲のモルタルに対して圧縮力を与える方向の力を与えるから、モルタルが破損しがたく、強度の大きいアンカーの構造を得ることができる。
Since the anchor fixing device of the present invention has been described above, at least one of the following effects can be expected as compared with the conventional method as shown in FIG.
<1> This is a method of attaching a plurality of load-bearing bodies to one PC steel wire. Furthermore, since the attachment of the load-bearing bodies can be completed simultaneously with the attachment of the fixing tool, the assembly work is very efficient.
<2> When one PC steel wire is tensioned with one jack, the difference in the elongation of the PC steel wire can be adjusted inside the fixing tool at a plurality of locations. There is no inconvenience that only great tension acts.
<3> In the conventional construction method as shown in FIG. 5, when placing load bearing bodies at a plurality of locations, it is necessary to insert a plurality of PC steel wires into narrow anchor holes. However, according to the configuration and method of the present invention, only one PC steel wire is arranged inside the anchor hole. Anchors with load-bearing bodies arranged at a plurality of locations can be installed by one PC steel wire. Therefore, the diameter of the drilling hole can be reduced, which is very economical.
<4> It is possible to fix the tension of the fixing tools at a plurality of positions of the PC steel wires arranged at different positions by only one tension by the jack, and therefore the work time can be greatly shortened.
<5> Compared to the invention described in Patent Document 1, the adjustment dimension may be determined by the number of adjustment spacers, so that fine adjustment is unnecessary, skill of an operator is not required, and reliability is high. An anchor structure can be obtained.
<6> Furthermore, compared to the invention described in Patent Document 1, the parts required for adjustment are economical washer-type steel plates, and thus are economical.
Since the <7> load bearing body gives a force in a direction to give a compressive force to the surrounding mortar, the mortar is hard to break, and an anchor structure with high strength can be obtained.

以下図面を参照しながら本発明のアンカーの定着具の実施例を説明する。   Embodiments of the anchor fixing device of the present invention will be described below with reference to the drawings.

<1>定着具の使用方法。
本発明のアンカーの定着具Cを実際に使用する状態は図4に示すとおりである。
すなわち、1本のPC鋼線Bの複数個所に、本発明の定着具Cと一体の耐荷体Aを取付け、アンカー孔E内に配置し、アンカー孔E外のジャッキDによって1本のPC鋼線Bを緊張する工法である。
この緊張力は、定着具Cと一体の耐荷体Aに伝達され、PC鋼線Bは緊張力を得ることができる。
その場合に耐荷体Aはその周囲のモルタルFに対して圧縮力を与える方向の力を与えるから、モルタルFが破損しがたく、強度の大きいアンカーの構造を得ることができる。
<1> How to use the fixing tool.
A state in which the anchor fixing tool C of the present invention is actually used is as shown in FIG.
In other words, the load bearing body A integrated with the fixing tool C of the present invention is attached to a plurality of locations of one PC steel wire B, arranged in the anchor hole E, and one PC steel is provided by the jack D outside the anchor hole E. This is a method of tensioning the line B.
This tension force is transmitted to the load bearing body A integrated with the fixing tool C, and the PC steel wire B can obtain the tension force.
In this case, since the load bearing body A applies a force in a direction in which a compressive force is applied to the surrounding mortar F, the mortar F is not easily damaged, and a strong anchor structure can be obtained.

<2>全体の構成。
本発明の定着具Cは、外筒1と、外筒1の内部に収納する拘束体2と、バネ3と、調整スペーサー4、および定着具Cと一体の耐荷体Aによって構成する。
<2> Overall configuration.
The fixing tool C of the present invention includes an outer cylinder 1, a restraint body 2 housed in the outer cylinder 1, a spring 3, an adjustment spacer 4, and a load bearing body A integrated with the fixing tool C.

<3>外筒1。
外筒1は、孔底側から孔口側まで貫通した中空の筒体である。
この外筒1の孔底側には孔底筒5を取付ける。
外筒1の孔口側には、直接、あるいは耐荷体を介して孔口筒6を取り付ける。
孔底筒5も、孔口筒6もその構造は同一である。
なお、本明細書において「孔底側」とは本発明の定着具Cをアンカー孔E内に配置した場合に、アンカー孔Eの最深部側のことを意味するものである。
また「孔口側」とは、本発明の定着具Cをアンカー孔E内に配置した場合に、アンカー孔Eの孔口側のことを意味するものである。
<3> Outer cylinder 1.
The outer cylinder 1 is a hollow cylinder penetrating from the hole bottom side to the hole opening side.
A hole bottom tube 5 is attached to the hole bottom side of the outer tube 1.
The hole mouth tube 6 is attached to the hole mouth side of the outer tube 1 directly or via a load-bearing body.
The structure of the hole bottom cylinder 5 and the hole mouth cylinder 6 are the same.
In the present specification, the “hole bottom side” means the deepest side of the anchor hole E when the fixing tool C of the present invention is disposed in the anchor hole E.
Further, the “hole side” means the hole side of the anchor hole E when the fixing tool C of the present invention is disposed in the anchor hole E.

<4>孔底筒、孔口筒。
孔底筒5は、PC鋼線B挿入孔を貫通して開口した筒体である。
この孔底筒5の外周にはネジ山を刻設し、このネジ山を介して外筒1との取付けに供する。
孔底筒5のPC鋼線B挿入孔の内径は、PC鋼線Bのシース部B1の外径よりも多少大きい寸法に形成する。
そして、孔底筒5の内部を貫通させたPC鋼線Bのシース部B1を外周から加圧状態で孔底筒5に取付けるようなPC鋼線Bと定着具Cとの取り付け構造は公知の構成である。
孔口筒6も同様の構成を利用できる。
<4> Hole bottom tube, hole mouth tube.
The hole bottom cylinder 5 is a cylinder body that is opened through the PC steel wire B insertion hole.
A screw thread is engraved on the outer periphery of the hole bottom tube 5 and is used for attachment to the outer tube 1 through the screw thread.
The inner diameter of the PC steel wire B insertion hole of the hole bottom tube 5 is formed to be slightly larger than the outer diameter of the sheath portion B1 of the PC steel wire B.
And the attachment structure of PC steel wire B and fixing tool C which attaches sheath part B1 of PC steel wire B which penetrated the inside of hole bottom cylinder 5 to hole bottom cylinder 5 in the pressurization state from the perimeter is publicly known. It is a configuration.
A similar configuration can be used for the hole-cylinder 6.

<5>拘束体。
拘束体2はPC鋼線Bの周囲から金属体を加圧して、PC鋼線Bの鋼線部B2をその外周から強固に把持するためのブロック体である。
そのためには油圧ジャッキなどを利用して、PC鋼線Bの鋼線部B2に嵌合した金属筒を強力に締め付けてPC鋼線Bと拘束体2を一体化させる。
この技術も公知の技術、装置を使用することができる。
<5> A restraint body.
The restraint body 2 is a block body for pressurizing the metal body from the periphery of the PC steel wire B and firmly holding the steel wire portion B2 of the PC steel wire B from the outer periphery thereof.
For that purpose, the PC steel wire B and the restraint body 2 are integrated by strongly tightening the metal cylinder fitted to the steel wire portion B2 of the PC steel wire B using a hydraulic jack or the like.
This technique can also use a known technique and apparatus.

<6>調整スペーサー4。
調整スペーサー4は、一定の厚さを備えた複数枚の板体である。
たとえばドーナツ状の金属盤であり、中央の穴の内径はPC鋼線Bの外径より多少大きく、その外径は外筒の内径より多少小さく構成する。
この調整スペーサー4の中央の穴にPC鋼線Bを通した場合に、調整スペーサー4の枚数を増加させれば、後述するように拘束体2の移動範囲を狭く制限することができる。
<6> Adjustment spacer 4.
The adjustment spacer 4 is a plurality of plates having a certain thickness.
For example, it is a donut-shaped metal board, and the inner diameter of the central hole is slightly larger than the outer diameter of the PC steel wire B, and the outer diameter is slightly smaller than the inner diameter of the outer cylinder.
If the number of the adjustment spacers 4 is increased when the PC steel wire B is passed through the central hole of the adjustment spacer 4, the movement range of the restraint 2 can be narrowly limited as will be described later.

<7>反力バネ。
拘束体2の孔口側には、拘束体2を孔底側へ押し戻すバネ3を配置する。
このバネ3の弾力によって拘束体2には孔底側へ押し出される力が作用する。
PC鋼線Bに孔外からジャッキによって強力な引っ張り力を与えた時には、PC鋼線Bを把持している拘束体2によってバネ3が加圧されて収縮する。
<7> Reaction force spring.
A spring 3 that pushes back the restraint 2 toward the hole bottom side is disposed on the hole opening side of the restraint 2.
A force pushed toward the bottom of the hole acts on the restraint 2 by the elastic force of the spring 3.
When a strong tensile force is applied to the PC steel wire B from the outside by a jack, the spring 3 is pressurized and contracted by the restraining body 2 holding the PC steel wire B.

<8>耐荷体。
本発明の耐荷体Aは、定着具Cと別に配置するのではなく、定着具Cと一体に構成する。
この耐荷体Aは、鋼製の中空の筒体であり、その外表面には多数の凹凸を形成するなど、モルタルなどの硬化剤との付着力が多くなるように構成する。
定着具Cの内面にはネジを刻設する。
一方、外筒1の外周面にもネジを刻設するが、この外筒1外面のネジは、耐荷体Aの筒内面のネジの位置に対応する位置に配置する。
したがって組み立て時には、外筒1の外周に耐荷体Aのネジをネジ込んで簡単に取り付けることができる。
<8> Load bearing body.
The load bearing body A of the present invention is not arranged separately from the fixing tool C, but is configured integrally with the fixing tool C.
This load-bearing body A is a steel hollow cylinder, and is configured so that adhesion to a hardener such as mortar is increased, for example, by forming a large number of irregularities on the outer surface thereof.
Screws are engraved on the inner surface of the fixing tool C.
On the other hand, a screw is also engraved on the outer peripheral surface of the outer cylinder 1, and the screw on the outer surface of the outer cylinder 1 is disposed at a position corresponding to the position of the screw on the inner surface of the load-resistant body A.
Therefore, at the time of assembly, the screw of the load bearing body A can be screwed onto the outer periphery of the outer cylinder 1 and attached easily.

<9>組み立て時の配置。
定着具Cの組み立て時には、外筒1の内部にPC鋼線Bを貫通させるが、その前にシースを除去したPC鋼線Bには拘束体2を取り付けておき、穴あきのワッシャ状の調整スペーサー4も通しておく。
そしてこの拘束体2を中心に、孔底側に調整スペーサー4を位置させ、反力バネ3を孔口側に位置させて、外筒1の内部に配置し、その後に孔底側から孔底筒5をねじ込んで設置する。
そして、外筒1の外周には、その外面に刻設したネジ部を利用して、耐荷体Aの内側のネジをネジ込んで取り付けて、定着具Cと耐荷体Aを強固に一体化する。
<9> Placement during assembly.
At the time of assembling the fixing device C, the PC steel wire B is penetrated into the outer cylinder 1, but before the PC steel wire B from which the sheath has been removed, the restraint body 2 is attached and a perforated washer-shaped adjustment spacer is provided. Pass 4 too.
Then, with the restraint body 2 as the center, the adjustment spacer 4 is positioned on the hole bottom side, the reaction force spring 3 is positioned on the hole opening side, and is disposed inside the outer cylinder 1. The cylinder 5 is installed by screwing.
Then, on the outer periphery of the outer cylinder 1, a screw portion carved on the outer surface thereof is used to screw in and attach the inner screw of the load bearing body A, thereby firmly integrating the fixing tool C and the load bearing body A. .

<10>調整スペーサーの枚数。
1本のPC鋼線Bを、ジャッキDで孔外から引っ張ると、孔口に近い位置では伸びが最も大きく、孔底側に近づくにしたがって伸びの量は小さくなる。
そこで、配置する定着具Cの位置、すなわち耐荷体Aの位置ごとに、その位置におけるPC鋼線Bの伸びの量に応じて、調整スペーサー4の枚数を調整する。
組み立て時に調整スペーサー4の枚数を多くして孔底筒5で押し込むと、拘束体2は孔口側、すなわちバネ3側に移動して設置される。
そのために、PC鋼線Bをアンカー孔Eの外からジャッキDで緊張した場合に、拘束体2の孔口側への移動可能な距離は短く制限される。
それとは反対に、調整スペーサー4の枚数を少なくして、孔底筒5で押し込むと、拘束体2の孔口側への移動可能な距離を大きく設定することができる。
このような調整を行った後に、バネの縮み可能範囲をもっとも長く設定した定着具Cは、アンカー孔の孔口側に位置させる。
ただしPC鋼線Bの最深部ではそれ以降の伸びの調整は不要だから、特別にバネ機能を備えた定着具Cを取り付ける必要はない。
バネの縮み可能範囲を狭く設定した順に、アンカー孔の孔底側に近い位置に位置させる。
このように調整スペーサー4の枚数を調整することによって、拘束体2の孔口側への移動距離の調整が可能となる。
その結果、PC鋼線Bの緊張時の引っ張り可能な長さを調節することができ、定着具C、耐荷体Aの取り付け位置の差、すなわちPC鋼線Bの長さの差による緊張力の不均一さを、均一なものに調整することができる。
<10> Number of adjusting spacers.
A single PC steel wire B, and pulled from the hole outside the jack D, the largest elongation is at a position near the hole opening, the amount of elongation as it approaches the hole bottom becomes small fence.
Therefore, for each position of the fixing tool C to be arranged, that is, the position of the load bearing body A, the number of adjustment spacers 4 is adjusted according to the amount of elongation of the PC steel wire B at that position.
When the number of the adjustment spacers 4 is increased at the time of assembly and pushed in by the hole bottom cylinder 5, the restraint 2 is moved and installed on the hole opening side, that is, the spring 3 side.
Therefore, when the PC steel wire B is tensioned by the jack D from the outside of the anchor hole E, the distance that the restraint body 2 can move to the hole side is limited to be short.
On the other hand, when the number of adjustment spacers 4 is reduced and the hole bottom cylinder 5 is pushed in, the distance that the restraint 2 can move to the hole side can be set large.
After performing such adjustment, the fixing tool C having the longest possible contraction range of the spring is positioned on the hole side of the anchor hole.
However, since it is not necessary to adjust the subsequent elongation at the deepest part of the PC steel wire B, it is not necessary to attach a fixing tool C having a special spring function .
The springs are positioned close to the bottom side of the anchor hole in the order in which the possible contraction range of the spring is set narrower .
By adjusting the number of the adjustment spacers 4 in this way, it is possible to adjust the movement distance of the restraint 2 to the hole opening side.
As a result, the tensionable length of the PC steel wire B can be adjusted, and the tension force due to the difference in the attachment position of the fixing tool C and the load bearing A, that is, the difference in the length of the PC steel wire B can be adjusted. The non-uniformity can be adjusted to be uniform.

<11>次の作動について説明する。 <11> The following operation will be described.

以上のような作業によって、1本のPC鋼線Bの鋼線部B2の複数の位置に、外周に耐荷体Aを固定した定着具Cを取付けて1本のテンドンを構成する。   Through the above-described operation, one tendon is configured by attaching fixing tools C each having a load bearing body A fixed to the outer periphery at a plurality of positions of the steel wire portion B2 of one PC steel wire B.

<12>PC鋼線Bの緊張。
PC鋼線Bをアンカー孔E内へ配置した後にモルタルなどの硬化剤を注入してPC鋼線BのシースB1の外側と地山とを一体に固化させる。
その後に孔Eの外に露出した1本のPC鋼線Bの鋼線部B2の端を1台のジャッキDによって引っ張って緊張する。
するとPC鋼線Bの鋼線部B2はシースB1の内部では移動が可能であるから、各定着具Cにおいて、PC鋼線Bを拘束した拘束体2は、孔口側へ移動し、バネ3は収縮する。
<12> Tension of PC steel wire B.
After the PC steel wire B is disposed in the anchor hole E, a hardener such as mortar is injected to solidify the outside of the sheath B1 of the PC steel wire B and the ground.
Thereafter, the end of the steel wire portion B2 of one PC steel wire B exposed outside the hole E is pulled by a single jack D and is strained.
Then, since the steel wire portion B2 of the PC steel wire B can be moved inside the sheath B1, the restraint body 2 restraining the PC steel wire B in each fixing tool C moves to the hole opening side, and the spring 3 Contracts.

<13>PC鋼線Bの伸び量の調整。
孔口側の定着具Cにおいては1本のPC鋼線Bの伸び量は最も大きく、孔底側に近づくにしたがって小さくなる。
そのために、孔口に近い定着具Cでは拘束体2は孔口側へほとんど移動させず、拘束体2の移動可能な距離は一番大きく設定する。(図3
一方、孔底に近い側の定着具C、すなわち深い位置の定着具Cでは拘束体2は大きく孔口側へ移動させてあり、拘束体2の移動可能な距離は一番小さく設定してある。(図2)
そのために、孔底に近い、深い位置の定着具Cでは、孔口に近い、浅い位置の定着具Cと比較して小さい変形量を吸収する。

<13> Adjustment of elongation amount of PC steel wire B.
Elongation amount of one PC steel wires B in the fixing part C of the hole opening side is the largest, it is smaller toward the hole bottom.
Therefore, in the fixing tool C close to the hole opening, the restraining body 2 is hardly moved to the hole opening side, and the movable distance of the restraining body 2 is set to be the largest . ( Figure 3 )
On the other hand, in the fixing tool C on the side close to the hole bottom, that is, the fixing tool C in the deep position, the restraining body 2 is largely moved to the hole opening side, and the movable distance of the restraining body 2 is set to be the smallest. . (Figure 2)
Therefore, the fixing tool C at a deep position near the hole bottom absorbs a smaller deformation amount than the fixing tool C at a shallow position near the hole opening.

<14>緊張時の伸び量の自動調整。
このように、アンカーの設置前に、浅い位置の定着具Cの拘束体2の移動可能距離は大きく、深い位置の定着具Cの拘束体2の移動可能距離は大きく調節してある。
そのためにジャッキで1本のPC鋼線Bを緊張すると、孔底に近い位置の定着具CのPC鋼線Bでは伸びの吸収量は大きく、浅い位置の定着具CのPC鋼線Bで吸収量は小さく、結局、1本のPC鋼線Bにおいてすべての位置で伸び量を吸収することが可能となる。
こうして、1本のPC鋼線Bに複数個の定着具Cを取付けた構成であるにもかかわらず、硬化剤の硬化後に1箇所のジャッキDで一度に緊張しても、すべての位置の異なる定着具Cにおいて、ほぼ均一な緊張力を導入することが可能となる。
さらに、各定着具Cには、その外周に耐荷体Aが固定してあるので、従来の装置のように定着具Cと別に耐荷体Aを取り付ける作業が不要であって、作業効率の高いアンカーの構造である。
<14> Automatic adjustment of elongation during tension.
Thus, before the anchor is installed, the movable distance of the restraining body 2 of the fixing tool C at the shallow position is large, and the movable distance of the restraining body 2 of the fixing tool C at the deep position is adjusted to be large.
Therefore, when one PC steel wire B is tensioned with a jack, the PC steel wire B of the fixing device C located near the hole bottom absorbs a large amount of elongation, and the PC steel wire B of the fixing device C located shallowly absorbs it. The amount is small, and eventually, the elongation amount can be absorbed at all positions in one PC steel wire B.
In this way, even if a plurality of fixing tools C are attached to a single PC steel wire B, even if the hardener is hardened at one time with one jack D, all positions are different. In the fixing tool C, a substantially uniform tension can be introduced.
Further, since the load bearing body A is fixed to the outer periphery of each fixing tool C, the work of attaching the load bearing body A separately from the fixing tool C as in the conventional apparatus is unnecessary, and the anchor having high work efficiency. This is the structure.

本発明のアンカーの定着具の実施例であり、アンカー孔の中間の位置へ配置する定着具の説明図。Explanatory drawing of the fixing tool which is an Example of the fixing tool of the anchor of this invention, and arrange | positions in the middle position of an anchor hole. アンカー孔の浅い位置へ配置する定着具の説明図。Explanatory drawing of the fixing tool arrange | positioned to the shallow position of an anchor hole. アンカー孔の深い位置に配置する定着具の説明図。Explanatory drawing of the fixing tool arrange | positioned in the deep position of an anchor hole. アンカー孔へ設置した状態の説明図。Explanatory drawing of the state installed in the anchor hole. 従来のUターン式アンカーの構造。Conventional U-turn anchor structure. 本件出願人の先行する発明の説明図。Explanatory drawing of prior invention of the present applicant.

符号の説明Explanation of symbols

A:耐荷体
B:PC鋼線
C:定着具
1:外筒
2:拘束体
3:バネ
4:調整スペーサー
5:孔底筒
A: Load bearing body B: PC steel wire C: Fixing tool 1: Outer cylinder 2: Restraining body 3: Spring 4: Adjustment spacer 5: Hole bottom cylinder

Claims (2)

PC鋼線に定着具を取り付け、この定着具を介して耐荷体に取付け、アンカー孔内に配置するアンカーの定着具であって、
定着具は、外筒と、外筒の内部に収納する拘束体と、バネと、調整スペーサーによって構成し、
拘束体はPC鋼線の周囲から金属体を加圧して圧着したPC鋼線を把持するためのブロック体であり、
外筒は孔底側から孔口側まで貫通した筒体であり、
調整スペーサーは、一定の厚さを備えた複数枚の板体であり、
耐荷体は、
中空の筒体であり、
定着具の外筒にネジ込んで取り付けるように構成し、
組み立て時には、
PC鋼線を把持した拘束体を中心に、孔底側に位置させた調整スペーサーと、孔口側に位置させたバネを外筒の内部に配置し、
調整スペーサーの枚数の多寡によって、拘束体をバネ側に移動させておき、
PC鋼線の引っ張り時における拘束体の孔口側への移動距離を調整できるように構成し、
外筒の外周には中空の耐荷体を取り付けた、
アンカーの定着具。
An anchor fixing tool is attached to a PC steel wire, is attached to a load-bearing body through the fixing tool, and is disposed in an anchor hole.
The fixing tool is composed of an outer cylinder, a restraint body stored inside the outer cylinder, a spring, and an adjustment spacer.
The restraint body is a block body for gripping the PC steel wire that is press-bonded by pressing the metal body around the PC steel wire,
The outer cylinder is a cylinder penetrating from the hole bottom side to the hole mouth side,
The adjustment spacer is a plurality of plates with a certain thickness,
Load-bearing body
A hollow cylinder,
It is configured to be screwed into the outer cylinder of the fixing tool.
During assembly,
Centering on the restraint body that grips the PC steel wire, an adjustment spacer positioned on the bottom side of the hole and a spring positioned on the side of the hole mouth are arranged inside the outer cylinder,
Depending on the number of adjustment spacers, move the restraint to the spring side,
Constructed so that the distance traveled to the hole side of the restraint when the PC steel wire is pulled can be adjusted,
A hollow load-resistant body was attached to the outer periphery of the outer cylinder.
Anchor anchor.
請求項1記載のアンカーの定着具を複数個使用し、
複数の定着具を取り付けたPC鋼線をアンカー孔内に挿入するに際して、
定着具の配置位置によって、
調整スペーサーの枚数を、孔口側の定着具では少なく、孔底側の定着具では多く配置して1本のPC鋼線に取り付けてアンカー孔内に挿入し、
さらに孔内へ硬化剤を注入し、
硬化剤の硬化後に、
PC鋼線を孔外から緊張して行う、
アンカーの設置方法。
A plurality of anchor fixing devices according to claim 1 are used,
When inserting a PC steel wire with multiple anchors into the anchor hole,
Depending on the location of the fixing tool,
The number of adjustment spacers is small in the fixing device on the hole opening side, and is large in the fixing device on the hole bottom side, is attached to one PC steel wire, and is inserted into the anchor hole.
Furthermore, a curing agent is injected into the hole,
After curing the curing agent,
Tensioning the PC steel wire from outside the hole,
Anchor installation method.
JP2008000471A 2008-01-07 2008-01-07 Anchor anchorage Active JP5044819B2 (en)

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