JP2007177485A - Anchor fixing tool and anchor installing method - Google Patents

Anchor fixing tool and anchor installing method Download PDF

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JP2007177485A
JP2007177485A JP2005376149A JP2005376149A JP2007177485A JP 2007177485 A JP2007177485 A JP 2007177485A JP 2005376149 A JP2005376149 A JP 2005376149A JP 2005376149 A JP2005376149 A JP 2005376149A JP 2007177485 A JP2007177485 A JP 2007177485A
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cylinder
steel wire
hole
anchor
fixing tool
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Osamu Fukuki
福来治
Tomoki Tsunoda
角田知己
Yoko Takahashi
高橋洋子
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing tool and its installing method capable of installing a plurality of fixing tools to one PC steel wire without causing such inconvenience that large tension acts only on the PC steel wire up to a shallow fixing tool. <P>SOLUTION: This anchor fixing tool is composed of an outer cylinder, a wedge seat cylinder and a wedge piece of gripping the PC steel wire. The PC steel wire is penetrated through the inside of the outer cylinder. A plurality of fixing tools are installed on one PC steel wire, and the end of the PC steel wire is gripped by a wedge piece group of the respective fixing tools. The tip of an adjusting cylinder on the hole port side of the outer cylinder is constituted so as to adjust a moving distance to the hole port side of the wedge seat cylinder. <P>COPYRIGHT: (C)2007,JPO&INPIT

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の定着具及びアンカーの設置方法に関するものである。
The present invention relates to an anchor fixing tool and an anchor installation method performed by installing a plurality of load bearing bodies in the ground.

従来から図８に示すように、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ｄ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。
特公平５−３０９３２号公報。 Conventionally, as shown in FIG. 8, a plurality of load-bearing bodies a are installed in the ground, a PC steel wire b is arranged for each load-bearing body a, and the exposed end of the ground surface is tensioned by a jack d. An anchor method has been developed.
Japanese Patent Publication No. 5-30932.

前記した従来の除去式アンカーにあっては、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。
もし、ジャッキｄ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ａ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 described above, a plurality of PC steel wires b have different lengths, and thus a special tension method is required.
If all the PC steel wires b are tensioned by the same distance by the jack d, 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. .
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 in a dimly lit site, the task of identifying the PC steel wire a and following a precisely determined sequence is troublesome at the site. Management is required.

上記のような従来の装置の課題を解決した本発明のアンカーの定着具は、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、クサビ座筒と、ＰＣ鋼線を把持するクサビ片とによって構成し、外筒は孔底側から孔口側まで貫通した筒体であり、外筒の孔底側に取付けた孔底筒は、ＰＣ鋼線挿入孔を貫通して開口した筒体であり、外筒の孔口側に外筒内へ出入り自在に取り付けた調整筒は、ＰＣ鋼線挿入孔を貫通して開口した筒体であり、クサビ座筒は外筒の内部に摺動自在に収納した筒体であり、クサビ片は、中空の円錐台を軸方向に複数に分割した部材であり、クサビ座筒の内部の貫通孔に収納してあり、クサビ座筒内の貫通孔は、孔口側の内径を小さくした円錐筒として形成し、クサビ片群によって、ＰＣ鋼線の端部を把持する構成であり、調整筒の先端が、クサビ座筒の孔口側への移動距離を制限するように構成した、アンカーの定着具を特徴とするものである。   The anchor fixing tool of the present invention that has solved the problems of the conventional apparatus as described above is attached to a PC steel wire, attached to a load-bearing body via the fixing tool, and fixed to the anchor disposed in the anchor hole. The fixing device is constituted by an outer cylinder, a wedge seat cylinder, and a wedge piece for gripping the PC steel wire, and the outer cylinder is a cylindrical body penetrating from the hole bottom side to the hole opening side. The hole bottom cylinder attached to the hole bottom side of the cylinder is a cylinder body that penetrates and opens through the PC steel wire insertion hole, and the adjustment cylinder that is attached to the hole opening side of the outer cylinder so as to freely enter and exit the outer cylinder is PC It is a cylinder that opens through the steel wire insertion hole, the wedge seat cylinder is a cylinder that is slidably housed inside the outer cylinder, and the wedge piece is divided into a plurality of hollow frustums in the axial direction And is housed in a through hole inside the wedge seat cylinder. The through hole in the wedge seat cylinder has a smaller inner diameter on the hole opening side. It is formed as a conical cylinder and is configured to grip the end portion of the PC steel wire by a wedge piece group, and the tip of the adjustment cylinder is configured to limit the moving distance to the hole opening side of the wedge seat cylinder. An anchor fixing tool is featured.

また本発明のアンカーの設置方法は、前記の定着具を使用し、定着具の孔底筒のＰＣ鋼線挿入孔、および調整筒のＰＣ鋼線挿入孔を貫通した状態で複数個の定着具を１本のＰＣ鋼線に取り付け、ＰＣ鋼線を孔外から緊張して行う、アンカーの設置方法を特徴としたものである。   Further, the anchor installation method of the present invention uses the above-described fixing tool, and includes a plurality of fixing tools in a state of passing through the PC steel wire insertion hole of the hole bottom cylinder of the fixing tool and the PC steel wire insertion hole of the adjustment cylinder. Is attached to one PC steel wire, and the anchor installation method is performed by tensioning the PC steel wire from the outside of the hole.

また本発明のアンカーの設置方法は、前記の定着具を使用し、定着具は、アンカー孔内における定着具の配置位置によって、調整筒の位置を調整し、調整後の定着具の孔底筒のＰＣ鋼線挿入孔、および調整筒のＰＣ鋼線挿入孔を貫通した状態で、複数の定着具を１本のＰＣ鋼線の孔底側の短部と中間の位置に取り付け、ＰＣ鋼線を孔外から緊張して行う、アンカーの設置方法を特徴としたものである。
Further, the anchor installation method of the present invention uses the above-described fixing tool, and the fixing tool adjusts the position of the adjustment cylinder according to the arrangement position of the fixing tool in the anchor hole, and the hole bottom cylinder of the fixing tool after adjustment. With the PC steel wire insertion hole and the PC steel wire insertion hole of the adjustment cylinder penetrating, a plurality of fixing tools are attached to the short portion of the hole bottom side of one PC steel wire and the middle position of the PC steel wire. This is characterized by an anchor installation method in which tensioning is performed from outside the hole.

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、次のような効果を期待することができる。
＜１＞ １本のＰＣ鋼線の複数個所に定着具を介して耐荷体を取付けることができる。そして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。
＜２＞ 従来は複数個所に耐荷体を配置する場合には１箇所のアンカー孔に複数本の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、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。
＜３＞ 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。
Since the anchor fixing tool of the present invention is as described above, the following effects can be expected.
<1> A load bearing body can be attached to a plurality of locations of one PC steel wire via a fixing tool. And when one PC steel wire is tensioned with one jack, the difference in elongation of PC steel wire can be adjusted inside the fixing tools at multiple locations, and only a short PC steel wire has a large tension. There is no inconvenience that acts.
<2> Conventionally, when load bearing bodies are arranged at a plurality of places, it is necessary to insert a plurality of PC steel wires into one anchor hole. However, according to the configuration and method of the present invention, it is possible to install anchors in which load-bearing bodies are arranged at a plurality of locations by one PC steel wire. Therefore, the diameter of the drilling hole can be reduced, which is very economical.
<3> Since 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, it is possible to greatly shorten the work time.

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＞全体の構成。
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７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を介して耐荷体Ａに取付け、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。
そしてこの本発明の定着具Ｃは、外筒１と、クサビ座筒２と、ＰＣ鋼線Ｂを把持するクサビ片３と調整筒５とによって構成する。
ＰＣ鋼線Ｂはシース部Ｂ１と、シースを除去した鋼線部Ｂ２とによって構成してあり、定着具Ｃは鋼線部Ｂ２の鋼線をクサビ片３によって周囲から把持することによって固定する。 <1> Overall configuration.
A state in which the anchor fixing tool C of the present invention is actually used is as shown in FIG.
That is, it is attached to the load bearing body A via a fixing tool C of the present invention at a plurality of locations on one PC steel wire B, arranged in the anchor hole E, and one PC steel by a jack D outside the anchor hole E. This is a method of tensioning the line B.
The fixing tool C according to the present invention includes an outer cylinder 1, a wedge seat cylinder 2, a wedge piece 3 that holds a PC steel wire B, and an adjustment cylinder 5.
The PC steel wire B is composed of a sheath portion B1 and a steel wire portion B2 from which the sheath is removed, and the fixing tool C is fixed by gripping the steel wire of the steel wire portion B2 from the periphery with the wedge pieces 3.

＜２＞外筒１。
外筒１は、孔底側（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）から孔口側（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）まで貫通した筒体で中空の筒体である。
この外筒１の孔底側には孔底筒８を取付ける。
外筒の孔口側には後述する調整筒５を取付けるが、この調整筒５は外筒内へ出入り自在である。 <2> Outer cylinder 1.
The outer cylinder 1 is formed from the hole bottom side (the deepest part side of the anchor hole E when the fixing tool C of the present invention is disposed in the anchor hole E) from the hole opening side (fixing tool C of the present invention to the anchor hole). When it is arranged in E, it is a hollow cylinder that penetrates to the hole opening side of the anchor hole E).
A hole bottom tube 8 is attached to the hole bottom side of the outer tube 1.
An adjustment cylinder 5 to be described later is attached to the hole side of the outer cylinder, and this adjustment cylinder 5 can freely enter and exit the outer cylinder.

＜３＞孔底筒。
この孔底筒８は、ＰＣ鋼線挿入孔を貫通して開口した筒体である。
この孔底筒８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８のＰＣ鋼線挿入孔の内径は、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。
さらにこの孔底筒８のＰＣ鋼線挿入孔にはネジ筒８１を取付ける。このネジ筒８１の内径は、ＰＣ鋼線のシース部Ｂ１の外径に近い寸法に形成してあり、ＰＣ鋼線のシース部Ｂ１を外周から加圧状態で孔底筒８に取付けるためのものである。
なお、このようなＰＣ鋼線Ｂのシースと定着具Ｃとの取り付け構造は公知の構成を利用できる。 <3> Hole bottom tube.
The hole bottom cylinder 8 is a cylinder body that is opened through the PC steel wire insertion hole.
A screw thread is engraved on the outer periphery of the hole-bottom cylinder 8 and is provided for attachment to the outer cylinder 1 through the screw thread.
The inner diameter of the PC steel wire insertion hole of the hole bottom tube 8 is formed to be slightly larger than the outer diameter of the sheath portion B1 of the PC steel wire B.
Further, a screw cylinder 81 is attached to the PC steel wire insertion hole of the hole bottom cylinder 8. The inner diameter of this screw cylinder 81 is formed to be close to the outer diameter of the PC steel wire sheath B1, and is used to attach the PC steel sheath B1 to the hole bottom cylinder 8 in a pressurized state from the outer periphery. It is.
In addition, a well-known structure can be utilized for the attachment structure of such a sheath of the PC steel wire B and the fixing tool C.

＜４＞クサビ座筒２。
クサビ座筒２は、外筒１の内部に摺動自在に収納した筒体である。
このクサビ座筒２は内部に貫通孔２１を設けた筒体であるが、貫通孔２１の内径は同一ではなく、孔口側へ向けて徐々に小さくなる円錐筒として構成する。 <4> Wedge washer 2.
The wedge seat cylinder 2 is a cylinder body slidably housed inside the outer cylinder 1.
The wedge seat cylinder 2 is a cylinder having a through hole 21 therein, but the inner diameter of the through hole 21 is not the same, and is configured as a conical cylinder that gradually decreases toward the hole opening side.

＜５＞クサビ片３。
クサビ片３は、中空の円錐台を軸方向に複数に分割した形状の複数の部材である。
このクサビ片３は、クサビ座筒２の貫通孔２１の内部に収納してあり、貫通孔２１の内径は、孔口側へ向けて徐々に小さく円錐筒して構成あるから、クサビ片３群の内部にＰＣ鋼線Ｂの鋼線部Ｂ２を位置させて孔口側へ引き寄せると、周囲のクサビ片３群の内径が収縮し、この収縮によって、ＰＣ鋼線Ｂの鋼線部Ｂ２を周囲から強固に把持することができる。
クサビ片３の外周には円周方向に溝３２を刻設し、この溝内にゴムリングを嵌合して係止筒６へ取付けた際に、バラバラにならないように構成する。
なお、以上のようなクサビ片３群とクサビ座筒２の組み合わせによってＰＣ鋼線Ｂのシースからの露出部分を直接に把持する機構は公知である。 <5> Wedge piece 3.
The wedge piece 3 is a plurality of members having a shape obtained by dividing a hollow truncated cone into a plurality of pieces in the axial direction.
The wedge piece 3 is housed inside the through hole 21 of the wedge seat cylinder 2, and the inner diameter of the through hole 21 is gradually reduced toward the hole opening side so that the wedge piece 3 group is formed. When the steel wire part B2 of the PC steel wire B is positioned inside and pulled toward the hole opening side, the inner diameter of the surrounding wedge pieces 3 group contracts, and by this contraction, the steel wire part B2 of the PC steel wire B is surrounded. Can be firmly gripped.
A groove 32 is formed in the outer periphery of the wedge piece 3 in the circumferential direction, and a rubber ring is fitted into the groove so that the wedge piece 3 does not fall apart.
A mechanism that directly grips the exposed portion of the PC steel wire B from the sheath by the combination of the wedge pieces 3 group and the wedge seat tube 2 as described above is known.

＜６＞係止筒６。
クサビ片３の孔底側は、係止筒６を取り付ける。
係止筒６は中央にＰＣ鋼線挿入孔を貫通させた筒体である。
クサビ片３を取付けるために、クサビ片３の内側には縁棚３１を内向きに突設し、この縁棚３１が係止筒６の係止溝６１の内部に係合するように構成する。
クサビ片３群の縁棚３１を係合溝６１に係合させた場合に、クサビ片３群は完全に円筒を構成せず、各クサビ片３の間に多少の隙間ができるような寸法に製作してある。
この隙間があるために、クサビ片３がクサビ座筒２の斜面した貫通孔２１を孔口側に移動した場合に、クサビ片３間の隙間を縮小してＰＣ鋼線Ｂをその周囲から強固に把持することが可能となる。
ＰＣ鋼線Ｂを定着具Ｃの孔口側から挿入した場合に、ＰＣ鋼線Ｂはこの係止筒６の中心のＰＣ鋼線挿入孔を貫通して孔底筒８から外筒１の外部へ露出する。 <6> Locking cylinder 6.
A locking cylinder 6 is attached to the bottom side of the wedge piece 3.
The locking cylinder 6 is a cylinder having a PC steel wire insertion hole penetrated through the center.
In order to attach the wedge piece 3, an edge shelf 31 protrudes inwardly inside the wedge piece 3, and the edge shelf 31 is configured to engage with the inside of the locking groove 61 of the locking cylinder 6. .
When the edge shelf 31 of the wedge piece 3 group is engaged with the engaging groove 61, the wedge piece 3 group does not completely form a cylinder, and has a size that allows some gaps between the wedge pieces 3. Produced.
Because of this gap, when the wedge piece 3 moves through the inclined through hole 21 of the wedge seat tube 2 to the hole opening side, the gap between the wedge pieces 3 is reduced to strengthen the PC steel wire B from its periphery. Can be held.
When the PC steel wire B is inserted from the hole opening side of the fixing tool C, the PC steel wire B passes through the PC steel wire insertion hole at the center of the locking tube 6 and passes from the hole bottom tube 8 to the outside of the outer tube 1. Exposed to.

＜７＞反力バネ。
クサビ座筒２の孔口側には、クサビ座筒２を孔底側へ押し戻す反力バネ７を配置する。
この反力バネ７の弾力によってクサビ座筒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、クサビ片３によってＰＣ鋼線Ｂを把持しているクサビ座筒２によって反力バネ７が加圧されて収縮する。 <7> Reaction force spring.
A reaction force spring 7 that pushes the wedge seat cylinder 2 back to the hole bottom side is disposed on the hole opening side of the wedge seat cylinder 2.
Due to the elasticity of the reaction force spring 7, a force pushed toward the bottom of the hole acts on the wedge seat cylinder 2.
When a strong tensile force is applied to the PC steel wire B from outside the hole by the jack, the reaction force spring 7 is pressurized and contracted by the wedge seat tube 2 holding the PC steel wire B by the wedge piece 3.

＜８＞調整筒５。
外筒の孔口側に調整筒５を取付ける。
この調整筒５は内部の貫通した筒体であり、その外周にねじ山を刻設する。
したがって、この調整筒５を回転させることによって外筒１の中心軸方向に向けて出入りさせることができる。
内部に貫通した貫通孔は、ＰＣ鋼線挿入孔５１として開口する。
調整筒５に貫通したＰＣ鋼線挿入孔５１の孔口側の端面からさらにネジ筒５２をねじ込む場合には、このネジ筒５２にもＰＣ鋼線を挿入するための挿入孔を貫通して開口する。
調整筒５を回転させて出入りさせる場合に、その先にはクサビ座筒２の端、あるいは端の位置させた受圧リング２５が位置している。
したがってたとえば調整筒５を外筒１の内部に侵入する方向、すなわち孔底側へ移動させておけば、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、クサビ座筒２は孔口側への移動可能な距離Ｌは短く制限される。
一方、調整筒５を外筒１の内部から引き抜く方向、すなわち孔口側へ移動させておけば、クサビ座筒２は孔口側へ移動可能な距離Ｌを大きく設定することができる。
こうして調整筒５の出入り量を調整することによって、クサビ３で把持したＰＣ鋼線Ｂの孔口側への移動距離の調整が可能となる。
その結果、後述するようにＰＣ鋼線の緊張時の引っ張り可能な長さを調節することができ、ＰＣ鋼線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。 <8> Adjustment cylinder 5.
The adjustment cylinder 5 is attached to the hole opening side of the outer cylinder.
This adjustment cylinder 5 is a cylindrical body penetrating inside, and a thread is engraved on the outer periphery thereof.
Therefore, the adjustment cylinder 5 can be rotated in and out toward the central axis of the outer cylinder 1.
The through hole penetrating inside opens as a PC steel wire insertion hole 51.
When the screw cylinder 52 is further screwed from the end surface of the PC steel wire insertion hole 51 penetrating into the adjustment cylinder 5, the screw cylinder 52 is also opened through the insertion hole for inserting the PC steel wire. To do.
When the adjustment cylinder 5 is rotated and moved in and out, the end of the wedge seat cylinder 2 or the pressure receiving ring 25 positioned at the end is located at the end.
Therefore, for example, if the adjusting cylinder 5 is moved in the direction of entering the inside of the outer cylinder 1, that is, toward the bottom of the hole, when the PC steel wire B is tensioned by the jack D from the outside of the anchor hole E, the wedge cylinder 2 The distance L that can be moved to the hole opening side is limited to be short.
On the other hand, if the adjustment cylinder 5 is moved in the direction of pulling out from the inside of the outer cylinder 1, that is, the hole opening side, the wedge seat cylinder 2 can set the distance L that can be moved to the hole opening side to be large.
In this way, by adjusting the amount of the adjustment cylinder 5 that moves in and out, the movement distance of the PC steel wire B gripped by the wedge 3 toward the hole side can be adjusted.
As a result, as will be described later, it is possible to adjust the length that can be pulled when the PC steel wire is tensioned, and to adjust the non-uniform tension due to the difference in the length of the PC steel wire to be uniform. Can do.

＜９＞次に作動について説明する。 <9> Next, the operation will be described.

＜１０＞調整筒５の調整。
アンカー孔Ｅの削孔を行った現地、あるいは工場において、複数の定着具Ｃを１本のＰＣ鋼線Ｂの複数個所の鋼線部Ｂ２に取付ける必要がある。
しかし複数の定着具Ｃは、アンカー孔Ｅ内においてその配置する位置が、孔内の浅い位置、深い位置、中間の位置というように異なる。
そこで定着具Ｃごとに、その配置する位置に応じて調整筒５の外筒１内への挿入量を調整する。
この挿入量の調整は、定着具Ｃの取付け位置に基づく計算で決定しておく。
そしてもっとも孔口に近い位置に配置する予定の定着具Ｃでは、調整筒５を孔口側へ移動させておき、その後に、あるいはその前にＰＣ鋼線Ｂを貫通孔から挿入する。
もっとも孔底に近い位置に配置する予定の定着具Ｃでは、調整筒５はもっとも孔底側へ移動させておき、その後に、あるいはその前にＰＣ鋼線Ｂを貫通孔から挿入する。 <10> Adjustment of the adjustment cylinder 5.
It is necessary to attach a plurality of fixing tools C to a plurality of steel wire portions B2 of one PC steel wire B at the site or factory where the anchor hole E is drilled.
However, the plurality of fixing tools C are arranged at different positions in the anchor hole E, such as a shallow position, a deep position, and an intermediate position in the hole.
Therefore, for each fixing tool C, the amount of insertion of the adjustment cylinder 5 into the outer cylinder 1 is adjusted according to the position of the fixing tool C.
The adjustment of the amount of insertion is determined by calculation based on the mounting position of the fixing tool C.
Then, in the fixing tool C scheduled to be disposed closest to the hole opening, the adjustment cylinder 5 is moved to the hole opening side, and the PC steel wire B is inserted from the through hole after or before that.
In the fixing tool C scheduled to be disposed closest to the hole bottom, the adjustment cylinder 5 is moved to the most bottom side, and the PC steel wire B is inserted from the through hole after or before that.

＜１１＞ＰＣ鋼線の取付け。
ＰＣ鋼線Ｂでは前記したように途中にシースを取り除いて鋼線が露出した鋼線部Ｂ２を形成しておく。
そして調整筒５の調整の終わった定着具Ｃを順に、１本のＰＣ鋼線Ｂに取付けてゆく。
その場合にクサビ片３で鋼線部Ｂ２を締め付けてしまってはＰＣ鋼線Ｂを挿入して貫通させることができない。
そこでクサビ片３を取り外しておき、その状態で調整筒５のＰＣ鋼線挿入孔からＰＣ鋼線Ｂを挿入し、孔底筒８のＰＣ鋼線挿入孔からＰＣ鋼線Ｂを露出させる。
１本の定着具Ｃの孔底筒８から露出したＰＣ鋼線Ｂは、次段の定着具Ｃの調整筒５のＰＣ鋼線挿入孔へ挿入し、孔底筒８から露出させる。
こうして１本のＰＣ鋼線Ｂの鋼線部Ｂ２に複数の箇所に定着具Ｃを取付けたら、図４に示すように、その後にクサビ片３を周囲から取付けて外筒1内へ移動させる。
なお、ＰＣ鋼線Ｂの孔底側の先端部に取付ける終端定着具Ｃ１は、孔底筒８にＰＣ鋼線挿入孔が貫通していないタイプのものを使用する。
以上の工程でＰＣ鋼線をいったん外筒１内に挿入し貫通させた後、ＰＣ鋼線Ｂを軽く引き出すだけでクサビ片３がクサビ座筒２内の傾斜面をスライドしてＰＣ鋼線Ｂを把持する。
こうして１本のＰＣ鋼線Ｂの鋼線部Ｂ２に複数個の定着具Ｃを取付け、各定着具Ｃには耐荷体Ａを取りつけて１本のテンドンを構成する。 <11> Installation of PC steel wire.
In the PC steel wire B, as described above, the sheath is removed in the middle to form the steel wire portion B2 where the steel wire is exposed.
Then, the fixing tool C after the adjustment of the adjustment cylinder 5 is sequentially attached to one PC steel wire B.
In that case, if the steel wire portion B2 is tightened with the wedge piece 3, the PC steel wire B cannot be inserted and penetrated.
Therefore, the wedge piece 3 is removed, and in this state, the PC steel wire B is inserted from the PC steel wire insertion hole of the adjustment cylinder 5, and the PC steel wire B is exposed from the PC steel wire insertion hole of the hole bottom cylinder 8.
The PC steel wire B exposed from the hole bottom tube 8 of one fixing tool C is inserted into the PC steel wire insertion hole of the adjustment tube 5 of the fixing device C at the next stage and exposed from the hole bottom tube 8.
Thus, if the fixing tool C is attached to the steel wire part B2 of one PC steel wire B at a plurality of locations, the wedge piece 3 is then attached from the periphery and moved into the outer cylinder 1 as shown in FIG.
In addition, the terminal fixing tool C1 attached to the front end portion of the PC steel wire B on the hole bottom side uses a type in which the PC steel wire insertion hole does not penetrate the hole bottom tube 8.
After the PC steel wire is once inserted into the outer cylinder 1 and penetrated through the above steps, the wedge piece 3 slides on the inclined surface in the wedge seat cylinder 2 by simply pulling out the PC steel wire B, and the PC steel wire B Grip.
In this way, a plurality of fixing tools C are attached to the steel wire portion B2 of one PC steel wire B, and a load bearing member A is attached to each fixing tool C to constitute one tendon.

＜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を拘束したクサビ座筒２は、孔口側へ移動し、反力バネ７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.
After that, the end of one PC steel wire B exposed outside the hole E is pulled by one jack D and is strained.
Then, since the steel wire of the PC steel wire B can move inside the sheath B1, the wedge seat tube 2 restraining the PC steel wire B moves to the hole opening side in each fixing tool C, and the reaction force spring 7 contracts.

＜１３＞ＰＣ鋼線Ｂの伸び量の調整。
孔口側の定着具Ｃにおいては孔口までの距離が短く、したがってＰＣ鋼線Ｂの伸び量は小さい。
ＰＣ鋼Ｂ線はシース部Ｂ１内でスライドが可能であり、鋼材のヤング率は同一だから孔底側の定着具ＣにおいてはＰＣ鋼線の伸び量が大きく、孔口側の定着具ＣではＰＣ鋼線の伸び量は小さい。
したがってもし調整量を考慮せずにジャッキＤで１本のＰＣ鋼線Ｂを一定値以上引っ張ると、前記したように、孔口側の定着具ＣまでのＰＣ鋼線Ｂに大きな引張り力が作用し、孔底側の定着具Ｃまでの長いＰＣ鋼線Ｂでは小さな引張り力しか作用しないという不均衡が生じる。
ところが本発明の定着具Ｃでは設置位置に応じて調整筒５の位置が調整してある。
すなわち孔口に近い定着具Ｃでは調整筒５は孔口側へ大きく移動させてあり、クサビ座筒２の移動可能な距離Ｌを大きく設定してある。
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では調整筒５は大きく孔底側へ移動させてあり、クサビ座筒２の移動可能な距離Ｌは小さく設定してある。
さらに最も孔底側の終端定着具Ｃ１においては移動可能距離Ｌをゼロに設定しておく。
そのために、孔口に近い、浅い位置の定着具Ｃでは、孔底に近い、深い位置の定着具Ｃと比較して大きな変形量を吸収することができる。 <13> Adjustment of elongation amount of PC steel wire B.
In the fixing tool C on the hole opening side, the distance to the hole opening is short, and therefore the amount of elongation of the PC steel wire B is small.
The PC steel B wire can be slid within the sheath portion B1, and since the Young's modulus of the steel material is the same, the amount of extension of the PC steel wire is large in the fixing device C on the bottom side of the hole, and the PC steel B The elongation of steel wire is small.
Therefore, if one PC steel wire B is pulled more than a certain value with the jack D without considering the adjustment amount, as described above, a large tensile force acts on the PC steel wire B up to the fixing device C on the hole side. However, an imbalance that only a small tensile force acts on the long PC steel wire B up to the fixing device C on the bottom side of the hole occurs.
However, in the fixing tool C of the present invention, the position of the adjustment cylinder 5 is adjusted according to the installation position.
That is, in the fixing tool C close to the hole opening, the adjustment cylinder 5 is largely moved to the hole opening side, and the movable distance L of the wedge seat cylinder 2 is set large.
On the other hand, in the fixing tool C on the side close to the hole bottom, that is, the fixing tool C at a deep position, the adjustment cylinder 5 is largely moved to the hole bottom side, and the movable distance L of the wedge seat cylinder 2 is set small. .
Further, the movable distance L is set to zero in the terminal fixing device C1 closest to the hole bottom.
Therefore, the fixing tool C at a shallow position close to the hole opening can absorb a large amount of deformation as compared with the fixing tool C at a deep position close to the hole bottom.

＜１４＞緊張時の伸び量の自動調整。
このように浅い位置の定着具Ｃのクサビ座筒３の移動可能距離Ｌは長く、深い位置の定着具Ｃのクサビ座筒３の移動可能距離Ｌは小さく調節してある。
そのためにジャッキで１本のＰＣ鋼線Ｂを緊張しても、浅い位置の定着具ＣのＰＣ鋼線Ｂでは伸びの吸収量は大きく、深い位置の定着具ＣのＰＣ鋼線Ｂではほとんど吸収することができない状態となり、結局、すべてのＰＣ鋼線Ｂにおいてほぼ同一の距離だけの伸び量となる。
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。
<14> Automatic adjustment of elongation during tension.
Thus, the movable distance L of the wedge seat tube 3 of the fixing tool C at the shallow position is long, and the movable distance L of the wedge seat tube 3 of the fixing tool C at the deep position is adjusted to be small.
Therefore, even if one PC steel wire B is tensioned with a jack, the PC steel wire B of the fixing device C at a shallow position absorbs a large amount of elongation, and the PC steel wire B of the fixing device C at a deep position absorbs almost. As a result, in all the PC steel wires B, the elongation amount is almost the same distance.
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.

本発明のアンカーの定着具の実施例であり、アンカー孔の深い位置へ配置した定着具の説明図。It is an Example of the anchor fixing tool of this invention, and is explanatory drawing of the fixing tool arrange | positioned in the deep position of an anchor hole. アンカー孔の浅い位置へ配置した定着具の緊張時の状態の説明図。Explanatory drawing of the state at the time of tension 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した定着具の緊張時の状態の説明図。Explanatory drawing of the state at the time of tension | tensile_strength of the fixing tool arrange | positioned in the deep position of an anchor hole. ＰＣ鋼線へクサビ片を後から取付ける状態の説明図。Explanatory drawing of the state which attaches a wedge piece to PC steel wire later. 定着具を取付ける前のＰＣ鋼線の説明図。Explanatory drawing of PC steel wire before attaching a fixing tool. 定着具をとりつけたＰＣ鋼線の説明図。Explanatory drawing of the PC steel wire which attached the fixing tool. アンカー孔内に配置したＰＣ鋼線の説明図。Explanatory drawing of the PC steel wire arrange | positioned in an anchor hole. 従来の除去式アンカーの説明図。Explanatory drawing of the conventional removable anchor.

符号の説明Explanation of symbols

Ｂ：ＰＣ鋼線
Ｃ：定着具
１：外筒
２：クサビ座筒
３：クサビ片
５：調整筒
８：孔底筒 B: PC steel wire C: Fixing tool 1: Outer cylinder 2: Wedge seat cylinder 3: Wedge piece 5: Adjustment cylinder 8: Hole bottom cylinder

Claims (3)

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、クサビ座筒と、ＰＣ鋼線を把持するクサビ片とによって構成し、
外筒は孔底側から孔口側まで貫通した筒体であり、
外筒の孔底側に取付けた孔底筒は、ＰＣ鋼線挿入孔を貫通して開口した筒体であり、
外筒の孔口側に外筒内へ出入り自在に取り付けた調整筒は、ＰＣ鋼線挿入孔を貫通して開口した筒体であり、
クサビ座筒は外筒の内部に摺動自在に収納した筒体であり、
クサビ片は、中空の円錐台を軸方向に複数に分割した部材であり、クサビ座筒の内部の貫通孔に収納してあり、
クサビ座筒内の貫通孔は、孔口側の内径を小さくした円錐筒として形成し、
クサビ片群によって、ＰＣ鋼線の端部を把持する構成であり、
調整筒の先端が、クサビ座筒の孔口側への移動距離を制限するように構成した、
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 wedge seat cylinder, and a wedge piece that holds a PC steel wire.
The outer cylinder is a cylinder penetrating from the hole bottom side to the hole mouth side,
The hole bottom cylinder attached to the hole bottom side of the outer cylinder is a cylinder that opens through the PC steel wire insertion hole,
The adjustment cylinder attached so as to freely enter and exit the outer cylinder at the hole opening side of the outer cylinder is a cylinder that opens through the PC steel wire insertion hole,
The wedge seat cylinder is a cylinder body slidably housed inside the outer cylinder,
The wedge piece is a member obtained by dividing a hollow truncated cone into a plurality of parts in the axial direction, and is housed in a through hole inside the wedge seat cylinder,
The through hole in the wedge seat cylinder is formed as a conical cylinder with a smaller inner diameter on the hole mouth side,
It is configured to grip the end of the PC steel wire by the wedge piece group,
The tip of the adjustment cylinder is configured to limit the moving distance to the hole opening side of the wedge seat cylinder,
Anchor anchor.
請求項１記載のアンカーの定着具を使用し、
定着具の孔底筒のＰＣ鋼線挿入孔、および調整筒のＰＣ鋼線挿入孔を貫通した状態で複数個の定着具を１本のＰＣ鋼線に取り付け、
アンカー孔内に挿入し、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。
Using the anchor fixing device according to claim 1,
A plurality of fixing tools are attached to one PC steel wire in a state of passing through the PC steel wire insertion hole of the hole bottom cylinder of the fixing tool and the PC steel wire insertion hole of the adjustment cylinder,
Insert it into the anchor hole, inject the curing agent,
After curing the curing agent,
Tensioning the PC steel wire from outside the hole,
Anchor installation method.
請求項１記載のアンカーの定着具を複数個使用し、
定着具は、アンカー孔内における定着具の配置位置によって、
調整筒の位置を調整し、
調整後の定着具の孔底筒のＰＣ鋼線挿入孔、および調整筒のＰＣ鋼線挿入孔を貫通した状態で、
複数の定着具を１本のＰＣ鋼線の孔底側の短部と中間の位置に取り付け、
アンカー孔内に挿入し、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,
The fixing tool depends on the position of the fixing tool in the anchor hole.
Adjust the position of the adjustment cylinder,
In a state of passing through the PC steel wire insertion hole of the hole bottom cylinder of the fixing tool after adjustment and the PC steel wire insertion hole of the adjustment cylinder,
Attach a plurality of fixing tools to the short part of the hole bottom side of one PC steel wire and the middle position.
Insert it into the anchor hole, inject the curing agent,
After curing the curing agent,
Tensioning the PC steel wire from outside the hole,
Anchor installation method.
JP2005376149A 2005-12-27 2005-12-27 Anchor fixing tool and anchor installing method Pending JP2007177485A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009161981A (en) * 2008-01-07 2009-07-23 Nozaki Tsutomu Anchor fixture
WO2017119145A1 (en) * 2016-01-06 2017-07-13 鹿島建設株式会社 Rock bolt

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06212632A (en) * 1993-01-18 1994-08-02 Aasu Tec:Kk Tension wire-rod bearing structure in anchor construction and fixing method of tension wire rod using the same structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06212632A (en) * 1993-01-18 1994-08-02 Aasu Tec:Kk Tension wire-rod bearing structure in anchor construction and fixing method of tension wire rod using the same structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009161981A (en) * 2008-01-07 2009-07-23 Nozaki Tsutomu Anchor fixture
WO2017119145A1 (en) * 2016-01-06 2017-07-13 鹿島建設株式会社 Rock bolt
WO2017119271A1 (en) * 2016-01-06 2017-07-13 鹿島建設株式会社 Rock bolt
JP6181343B1 (en) * 2016-01-06 2017-08-16 鹿島建設株式会社 Rock bolt
JP2017186902A (en) * 2016-01-06 2017-10-12 鹿島建設株式会社 Support structure

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