JP3459629B2 - Anchor anchoring method and anchor anchoring structure - Google Patents
Anchor anchoring method and anchor anchoring structureInfo
- Publication number
- JP3459629B2 JP3459629B2 JP2000340510A JP2000340510A JP3459629B2 JP 3459629 B2 JP3459629 B2 JP 3459629B2 JP 2000340510 A JP2000340510 A JP 2000340510A JP 2000340510 A JP2000340510 A JP 2000340510A JP 3459629 B2 JP3459629 B2 JP 3459629B2
- Authority
- JP
- Japan
- Prior art keywords
- anchor
- existing
- anchors
- screw
- fixing
- 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 - Fee Related
Links
Landscapes
- Piles And Underground Anchors (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、山留工事や斜面安
定工事、或いは構造物の安定工事等において、PC鋼撚
り線等のアンカー(一般にはテンドンと呼ばれてい
る。)をアンカープレートに定着するアンカーの定着方
法並びにアンカーの定着構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses an anchor such as a PC steel stranded wire (generally called a tendon) as an anchor plate in mountain retaining work, slope stabilizing work, structure stabilizing work, and the like. How to fix anchors
It relates to the law and anchor anchoring structure .
【0002】[0002]
【従来の技術】山留工事等においては、地中深く掘削さ
れた穴にアンカーを挿入してグラウト材で固定し、その
アンカーの先端を地表のアンカープレートにくさびやボ
ルト・ナットで定着することが行われている。2. Description of the Related Art In mountain retaining works, an anchor is inserted into a hole dug deep in the ground, fixed with grout material, and the tip of the anchor is fixed to the anchor plate on the surface with wedges, bolts and nuts. Is being done.
【0003】上記のくさび定着方式は、二つ割りのくさ
びをアンカーの先端に挟み付けて、アンカープレートに
固定されたアンカーヘッドの孔に嵌め入れることによ
り、アンカーをアンカープレートに定着させるものであ
る。くさび定着方式は、現場作業のため緊張しろさえあ
れば、予定した位置と異なる位置をその場の状況に応じ
て自由に定着することができ、施工性が良い。The wedge fixing method described above is to fix the anchor to the anchor plate by sandwiching the wedge into two parts at the tip of the anchor and fitting it into the hole of the anchor head fixed to the anchor plate. The wedge fixing method can be easily fixed at a position different from the planned position according to the situation of the site, as long as there is enough tension for the site work, and the workability is good.
【0004】また、ねじ式定着方式は、一般にマンショ
ン式と呼ばれており、アンカーの先端にねじ式定着具を
予め工場において圧着加工で固定しておき、そのねじ式
定着具をアンカープレートの貫通孔に挿通させ定着ナッ
トを螺着してアンカーをアンカープレートに定着させる
ものである。このマンション式は、アンカーの再緊張が
容易で、メンテナンスの面で優れている。The screw type fixing system is generally called a condominium type, and a screw type fixing device is previously fixed to the tip of the anchor by crimping in a factory, and the screw type fixing device is penetrated through the anchor plate. The anchor is fixed to the anchor plate by inserting it through the hole and screwing the fixing nut. This apartment type is easy to re-tension the anchor and is excellent in maintenance.
【0005】[0005]
【発明が解決しようとする課題】しかし、くさび定着方
式には次の問題点がある。
(a) 一度定着するとアンカーにくさびで傷が付く。
(b) 錆によってくさびがスリップしやすい。
(c) ある程度以上の緊張しろがないと、ジャッキ等
の緊張装置でアンカーを緊張し直すことが難しい。
(d) アンカーヘッドの外周にねじを切ったリング式
でも調整しろが限られており、総じて、施工後(定着
後)の維持管理がしにくい。However, the wedge fixing method has the following problems. (A) Once anchored, the anchor will be wedged and scratched. (B) Rust easily slips the wedge. (C) It is difficult to re-tension the anchor with a tension device such as a jack unless there is a certain amount of tension. (D) Even with a ring type in which a screw is cut on the outer periphery of the anchor head, there is a limited amount of adjustment, and as a whole, it is difficult to maintain and manage after construction (after fixing).
【0006】また、ねじ式定着方式には次の問題点があ
る。
(a) アンカーに対するねじ式定着具の現場での圧着
加工が困難で、工場でアンカーにねじ式定着具を固定し
なければならない。このため、予め製作したアンカーの
長さと、施工後の実際の有効長さが異なる場合、継ぎ足
しやアンカープレートのかさ上げが必要になり、手間が
かかるうえ、美観が損なわれる。
(b) 継ぎ足し等によって、初期に期待した定着具の
強度が得られない。
(c) また、防食性能、防食構造が規格どうりになら
ない。Further, the screw type fixing system has the following problems. (A) Since it is difficult to crimp the screw-type fixing device to the anchor in the field, it is necessary to fix the screw-type fixing device to the anchor at the factory. For this reason, when the length of the pre-fabricated anchor is different from the actual effective length after the construction, it is necessary to add additional members and increase the bulk of the anchor plate, which is troublesome and impairs the aesthetic appearance. (B) The strength of the fixing device expected in the initial stage cannot be obtained due to replenishment or the like. (C) Further, the anticorrosion performance and the anticorrosion structure do not conform to the standard.
【0007】本発明の課題は上記の問題点を解決するこ
とであり、その主たる目的は、作業現場においてアンカ
ーに確実かつ容易に取り付けることができる、マンショ
ン式の取付け位置自在のアンカー用ねじ式定着具を用い
たアンカーの定着方法並びにアンカーの定着構造を提供
することである。 An object of the present invention is to solve the above problems, the main object can be attached securely and easily to the anchor at the work site, condominiums
Uses a screw-type fixing device for anchors that can be freely mounted
Providing anchor anchoring method and anchor anchoring structure
It is to be.
【0008】[0008]
【課題を解決するための手段】上記の目的を達成するた
めに請求項1記載の発明は、複数本の既設アンカーのう
ち一本の既設アンカーの先端を鋼線カプラ−で掴んで緊
張装置に該既設アンカーを結合し、該既設アンカーを緊
張装置で引っ張ることにより、それまで既設アンカー
を、アンカープレートにアンカーヘッドを介して定着さ
せていたくさびをアンカーヘッドから抜き出し、この操
作をすべての既設アンカーについて行い、そのくさびと
アンカーヘッドを既設アンカーから撤去する前工程と、
取付位置自在のアンカー用ねじ式定着具の挿通孔に既設
アンカーを挿通させ、エポキシ樹脂を注入孔から挿通孔
に注入して現場で既設アンカーを取付位置自在のアンカ
ー用ねじ式定着具に固結する工程と、アンカープレート
の貫通孔に挿通された上記取付位置自在のアンカー用ね
じ式定着具を緊張装置で引っ張って上記既設アンカーを
再緊張させる工程と、取付位置自在のアンカー用ねじ式
定着具に螺着された定着ナットを締め付けて緊張状態の
既設アンカーをアンカープレートに定着させる工程とを
具備し、前記取付位置自在のアンカー用ねじ式定着具と
して、中心に既設アンカーを挿通させる挿通孔が形成さ
れるとともに、外周面に定着ナットが螺着される雄ねじ
が形成され、一端部の側部に上記挿通孔にエポキシ樹脂
を注入する注入孔が形成された鋳物製の取付位置自在の
アンカー用ねじ式定着具であって、前記挿通孔が、注入
孔が形成された一端部に近づくにしたがって窄まるテー
パ状とされ、かつ挿通孔の内面が粗砂の中子の使用によ
って粗面とされた取付位置自在のアンカー用ねじ式定着
具を用いる。 In order to achieve the above-mentioned object, the invention according to claim 1 has a plurality of existing anchors.
Hold the tip of one existing anchor with a steel wire coupler and tighten it.
By connecting the existing anchor to the tensioning device and pulling the existing anchor with the tensioning device, the wedge that had been fixed to the anchor plate through the anchor head until then is pulled out from the anchor head, and this operation is performed.
Perform the work on all existing anchors, and remove the wedge and anchor head from the existing anchors ,
Insert the existing anchor into the insertion hole of the screw type fixing device for anchors that can be attached at any position, inject epoxy resin into the insertion hole from the injection hole, and fix the existing anchor on the spot to the screw type fixing device for anchors that can be attached at any position. And a step of re-tensioning the existing anchor by pulling with a tensioning device the anchor-type screw anchoring device that is inserted through the through hole of the anchor plate, and the anchoring screw-type anchoring device that is freely attachable. Fixing the existing anchor in a tensioned state to the anchor plate by tightening a fixing nut screwed to the anchor plate, and a screw-type fixing device for an anchor that can be freely attached at the mounting position.
Then, the insertion hole for inserting the existing anchor is formed in the center.
And a fixing nut is screwed onto the outer peripheral surface.
Epoxy resin is formed in the insertion hole at the side of one end
Made of a casting with an injection hole for pouring
An anchor screw type fixing tool, wherein the insertion hole is an injection hole.
A taper that narrows as it approaches the one end where the hole is formed.
The inner surface of the insert hole is made of coarse sand by using a core.
Anchor screw type anchoring with a roughened surface and free mounting position
Use ingredients.
【0009】この手段では、挿通孔に既設アンカーを挿
入或いは挿通させ、注入孔からエポキシ樹脂を挿通孔に
注入して固結させることにより、本取付け位置自在のア
ンカー用ねじ式定着具を既設アンカーに一体に取り付け
る。したがって、既設アンカーに対する取付けに位置上
の制約が全くなく、現場の状況等に応じて既設アンカー
の最適位置に本取付け位置自在のアンカー用ねじ式定着
具を固定することができる。結局、この取付け位置自在
のアンカー用ねじ式定着具によれば、従来のくさび定着
方式とねじ式定着方式の長所が生かされ、欠点が解消さ
れる。According to this means, an existing anchor is inserted or inserted into the insertion hole, and epoxy resin is injected into the insertion hole from the injection hole to be solidified, whereby a screw-type fixing device for anchors that can be permanently attached is installed in the existing anchor. To be integrated with. Accordingly, without any restriction on the position in attachment to existing anchors, it is possible to fix the screw fixing member for the mounting position freely anchor optimum position of existing anchor according to status of the site. After all, according to the screw type fixing device for anchors which can be freely mounted, the advantages of the conventional wedge fixing system and screw fixing system can be utilized and the drawbacks can be eliminated.
【0010】また、この構成では、既設アンカーを注入
孔側の端部から挿通孔に挿入し、エポキシ樹脂で固結す
る。既設アンカーに対する緊張力は、挿通孔が窄まる方
向にかかるため、より強固で安定した固定力が得られ
る。挿通孔内面の粗面の凹凸はエポキシ樹脂の付着力を
向上させる。Further, in this structure, the existing anchor is inserted into the insertion hole from the end portion on the injection hole side and fixed by the epoxy resin. Since the tension on the existing anchor is applied in the direction in which the insertion hole is narrowed, a stronger and more stable fixing force can be obtained. The rough surface irregularities on the inner surface of the insertion hole improve the adhesive force of the epoxy resin.
【0011】[0011]
【0012】この手段では、固結工程を現場で行うた
め、既設アンカーの最適位置に取付け位置自在のアンカ
ー用ねじ式定着具を取り付けることができる。したがっ
て、従来のねじ式定着方式と違い、継ぎ足しやアンカー
プレートのかさ上げが全く不要で、手間をかけずに能率
よく迅速かつ的確に既設アンカーを定着することがで
き、しかも美観を損なうことがない。[0012] With this means, since the consolidation step is performed on site, it is possible to attach the anchor type screw fixing device at the optimum position of the existing anchor. Therefore, unlike the conventional screw-type fixing method, no splicing or raising of the anchor plate is required, and the existing anchor can be fixed efficiently, quickly and accurately without any trouble, and it does not spoil the appearance. .
【0013】上記アンカーの定着方法において、必要が
あれば、固結工程の前に、既設アンカーの挿入部分を洗
浄して既設アンカーに付着したグリースやセメント等を
除去したり、定着具の下端位置のアンカー部分の隙間に
ブチルゴム等をつめてエポキシ樹脂の漏出を前もって防
ぎ、或いは、適当な電熱器で定着具とその挿通孔に挿入
された既設アンカーを加温して、屋外作業での雨、凍
結、低温など、エポキシ樹脂の固結付着を阻害する悪条
件をなくす。[0013] In the fixing method of the anchor, if necessary, prior to the consolidation step, or to remove the grease or cement or the like attached to the existing anchor washed insertion portion of the existing anchor, lower end position of the fixing device Butyl rubber or the like is packed in the gap between the anchor parts to prevent the epoxy resin from leaking out in advance, or by heating the existing anchor inserted in the fixing tool and its insertion hole with a suitable electric heater to prevent rain in outdoor work. Eliminates adverse conditions, such as freezing and low temperatures, that hinder the solidification and adhesion of epoxy resin.
【0014】また、請求項1記載の発明の構成では、く
さびで定着された既設のアンカーを更度緊張させること
ができ、しかも以後はマンション式に切り替わるため、
維持管理が容易になる。また、くさびでアンカーに付け
られた傷がエポキシ樹脂で修復されるので好都合であ
る。なお、この場合、前述の洗浄、ブチルゴム等による
隙間塞さぎ、加温操作は、くさびの撤去後に積極的に行
う。Further, in the structure according to the first aspect of the present invention, since the existing anchor fixed by the wedge can be further tensioned, and thereafter, the anchor is switched to the condominium type,
Maintenance becomes easy. It is also convenient because the scratches made on the anchor by the wedge are repaired by the epoxy resin. In this case, the above-mentioned cleaning, the gap filling with butyl rubber, etc., and the heating operation are positively performed after the wedge is removed.
【0015】[0015]
【0016】請求項2記載の発明は、請求項1記載のア
ンカーの定着方法によってアンカーを定着した構成とし
た。[0016] According to a second aspect of the invention, has a structure that fixes the anchor by the fixing method of the anchor of claim 1, wherein.
【0017】この手段では、作業性が良好で、新規はも
とより、既存のアンカーにも容易に実施することがで
き、しかも維持管理がしやすい優れたアンカーの定着構
造が得られる。By this means, it is possible to obtain an excellent anchor fixing structure which has good workability, can be easily applied to existing anchors as well as new ones, and is easy to maintain and manage.
【0018】[0018]
【発明の実施の形態】発明の実施の形態を添付図面を参
照して説明する。図1は本発明に係る取付け位置自在の
アンカー用ねじ式定着具の実施の形態を示す。この定着
具1は、中心に挿通孔1aを形成するとともに、外周面
に雄ねじ1bを形成し、下端部の側部に注入孔1cを形
成して製造されている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an embodiment of a screw type fixing device for an anchor according to the present invention, the fixing position of which is adjustable. This fixing tool 1 is manufactured by forming an insertion hole 1a in the center, forming a male screw 1b on the outer peripheral surface, and forming an injection hole 1c on the side portion of the lower end portion.
【0019】挿通孔1aは、PC鋼撚り線等のアンカー
3を挿入或いは挿通させるもので、上端部から下端部に
近づくにしたがって窄まるテーパ状にされ、また内面の
下部部分は機械加工で比較的大きい凹凸が付された粗面
1dとされている。挿通孔1aの下端1eは面取りさ
れ、アンカー3を挿入させ易くしている。The insertion hole 1a is for inserting or inserting an anchor 3 such as a PC steel stranded wire. The insertion hole 1a is tapered so as to approach from the upper end to the lower end, and the lower portion of the inner surface is machined for comparison. It is a rough surface 1d having a large unevenness. The lower end 1e of the insertion hole 1a is chamfered to facilitate insertion of the anchor 3.
【0020】雄ねじ1bは、図2の定着ナット5を螺着
するもので、機械加工により台形ねじとして形成されて
いる。また、注入孔1cは、挿通孔1aにエポキシ樹脂
7を注入するためのものである。エポキシ樹脂7として
は、通常、エポキシ化合物(主剤)7a(図5参照)と
硬化剤7b及びグラスファイバーやカーボンファイバー
等の繊維(図示せぬ)を混合したものが用いられるが、
グラスファイバー等の繊維を混入しないエポキシ樹脂、
或いは他の固結剤を用いることもできる。The male screw 1b is for fixing the fixing nut 5 shown in FIG. 2 and is formed as a trapezoidal screw by machining. The injection hole 1c is for injecting the epoxy resin 7 into the insertion hole 1a. As the epoxy resin 7, a mixture of an epoxy compound (main ingredient) 7a (see FIG. 5), a curing agent 7b, and fibers (not shown) such as glass fiber and carbon fiber is usually used.
Epoxy resin that does not mix fibers such as glass fiber,
Alternatively, other binding agents can be used.
【0021】図の取付け位置自在のアンカー用ねじ式定
着具1は、鋳物製とされ、挿通孔1aの上端部分は粗砂
の中子の使用によって凹凸の軽微な粗面1fとなってい
る。 The screw type anchoring device 1 for an anchor, which can be freely attached at a position shown in the figure, is made of cast metal, and the upper end portion of the insertion hole 1a has a slightly rough surface 1f having unevenness due to the use of a core of coarse sand. Has become.
【0022】図3ないし図10は本発明に係るアンカー
の定着方法及びアンカーの定着構造の実施の形態を示
す。アンカー3は図1の取付け位置自在のアンカー用ね
じ式定着具1を用いて定着する。すなわち、地中に掘削
された穴9に挿入されてグラウト材で固定されたアンカ
ー3の先端部分を洗浄してアンカー3に付着している水
分、グリース、セメント等の異物を除去する。そして、
予定された取付け位置自在のアンカー用ねじ式定着具1
の下端にあたる部分を塞いでエポキシ樹脂7の漏出を防
止するために、図3のように、ブチルゴム10等でアン
カー3の鋼線間の隙間を埋める。3 to 10 show an embodiment of an anchor fixing method and an anchor fixing structure according to the present invention. The anchor 3 is fixed by using the screw-type fixing device 1 for anchors whose mounting position is freely adjustable as shown in FIG. That is, the tip portion of the anchor 3 inserted into the hole 9 excavated in the ground and fixed with the grout material is washed to remove foreign matters such as water, grease and cement attached to the anchor 3. And
Anchor screw-type fixing device 1 that can be installed at any planned position
3, the gap between the steel wires of the anchor 3 is filled with butyl rubber 10 or the like in order to prevent the epoxy resin 7 from leaking by closing the lower end of the epoxy resin 7.
【0023】次いで、アンカー3の先端部を、取付け位
置自在のアンカー用ねじ式定着具1の挿通孔1aに注入
孔1c側の下端部から挿通させて、取付け位置自在のア
ンカー用ねじ式定着具1をアンカー3に装着する。定着
具1の装着後、エポキシ樹脂7の硬化を促進し、また、
屋外の雨、凍結、低温など、エポキシ樹脂7の固結付着
を阻害する悪条件を除いて作業条件を改善し一定化する
目的で、定着具1の外周を電熱器等の加温器11で加温
する(図4参照)。Then, the tip of the anchor 3 is inserted into the insertion hole 1a of the screw-type fixing device 1 for an anchor, which can be freely attached, from the lower end on the injection hole 1c side, and the screw-type anchor device for an anchor, which can be freely attached, is attached. Attach 1 to anchor 3. After mounting the fixing tool 1, accelerates the curing of the epoxy resin 7, and
A heater 11 such as an electric heater is provided around the outer periphery of the fixing tool 1 for the purpose of improving and stabilizing the working conditions except for bad conditions such as outdoor rain, freezing, and low temperature that hinder the solidification and adhesion of the epoxy resin 7. Warm (see Figure 4).
【0024】上記作業の終了後、或いは上記作業に並行
して、図5に示すように、エポキシ化合物7aと硬化剤
7b及びグラスファイバー等の繊維を所定の割合で専用
の混合機13で混合しエポキシ樹脂7とする。この場
合、通常、1回分のエポキシ樹脂7を、固結強度を低下
させる気泡の混入を防止して混合する。上記で得られた
エポキシ樹脂7は、直ちに、加温後、或いは加温中の取
付け位置自在のアンカー用ねじ式定着具1の挿通孔1a
に、図6のように、コーキングガン14等によってパイ
プ15を通して注入孔1cから挿通孔1aの上部まで圧
入充填する。After the above work or in parallel with the above work, as shown in FIG. 5, the epoxy compound 7a, the curing agent 7b, and the fibers such as glass fiber are mixed in a predetermined mixing ratio in a dedicated mixer 13. Epoxy resin 7 is used. In this case, usually, the epoxy resin 7 for one time is mixed while preventing the inclusion of bubbles that reduce the consolidation strength. The epoxy resin 7 obtained as described above is immediately inserted into the insertion hole 1a of the screw fixing device 1 for an anchor, which can be mounted at any position after or during heating.
Then, as shown in FIG. 6, the caulking gun 14 or the like is used to press-fill from the injection hole 1c to the upper part of the insertion hole 1a through the pipe 15.
【0025】次に、穴9の開口端部分の防食構築のため
に、図7のように、背面管17を打ち込み、端部をエポ
キシ樹脂やホットメルト等の止水材18で止水し、アン
カープレート20をその貫通孔20aに取付け位置自在
のアンカー用ねじ式定着具1を挿通させて取り付ける。Next, in order to construct an anticorrosion structure for the opening end portion of the hole 9, as shown in FIG. 7, the back tube 17 is driven in and the end portion is stopped with a water stop material 18 such as epoxy resin or hot melt. The anchor plate 20 is attached by inserting the anchor screw type fixing device 1 into the through hole 20a.
【0026】上記作業の終了後、図8に示すように、取
付け位置自在のアンカー用ねじ式定着具1に定着ナット
5を螺着し、またアンカープレート20に、ジャッキ
(シリンダ)等の緊張装置22を取付部材23を介し取
り付けてカプラー24を定着具1の雄ねじ1bに螺着す
る。After the above work is completed, as shown in FIG. 8, a fixing nut 5 is screwed to a screw type fixing device 1 for an anchor which can be freely mounted, and a tensioning device such as a jack (cylinder) is attached to the anchor plate 20. 22 is attached via the attachment member 23, and the coupler 24 is screwed onto the male screw 1b of the fixing tool 1.
【0027】そして、上記の状態で緊張装置22を作動
させて定着具1を介してアンカー3を引っ張り、所定の
力でアンカー3が緊張したところで定着ナット5をアン
カープレート20に緩みなく締め付けてアンカー3を定
着する。なお、緊張装置22によるアンカー3の緊張
は、エポキシ樹脂7の固結が実用強度に達した後に行う
ことは言うまでもない。定着ナット5の操作は取付部材
23の窓孔23aから行う。Then, in the above state, the tensioning device 22 is actuated to pull the anchor 3 through the fixing tool 1, and when the anchor 3 is tensioned by a predetermined force, the fixing nut 5 is tightened to the anchor plate 20 without loosening. Fix 3 Needless to say, the tension of the anchor 3 by the tension device 22 is performed after the consolidation of the epoxy resin 7 reaches the practical strength. The fixing nut 5 is operated through the window hole 23a of the mounting member 23.
【0028】その後、緊張装置22やカプラー24等を
取り外してから、図9のように、アンカープレート20
にヘッドキャップ26を定着具1の露出部分と定着ナッ
ト5とを覆って取り付け、そのヘッドキャップ26と背
面管17の空間に防錆油27を充填して定着作業を終了
する。符号28は防錆油27をヘッドキャップ26に充
填するニップル、29は空気抜き用の栓である。Then, after removing the tensioning device 22, the coupler 24, etc., as shown in FIG.
A head cap 26 is attached to cover the exposed portion of the fixing tool 1 and the fixing nut 5, and the space between the head cap 26 and the rear tube 17 is filled with rust preventive oil 27 to finish the fixing operation. Reference numeral 28 is a nipple for filling the head cap 26 with rust preventive oil 27, and 29 is an air vent plug.
【0029】ところで、本発明に係るアンカーの定着方
法は、くさびで定着された既設アンカーを再緊張させる
際にも適用することができる。図11はこの例を示すも
ので、まず、アンカープレート20に緊張装置32を取
付部材33を介して取り付け、鋼線カプラー34で1本
のアンカー3の先端を掴んでジャッキ等の緊張装置32
にアンカー3を結合する。By the way, the anchor fixing method according to the present invention can also be applied to re-tensioning an existing anchor fixed by a wedge. FIG. 11 shows this example. First, the tensioning device 32 is attached to the anchor plate 20 via the attachment member 33, and the tip of one anchor 3 is gripped by the steel wire coupler 34 so that the tensioning device 32 such as a jack.
Anchor 3 is connected to.
【0030】上記の状態で緊張装置32を作動させてア
ンカー3を引っ張り、二つ割りのくさび37をアンカー
ヘッド38の孔(図示せず)から図11のように抜き出
してアンカー3から取り外す。この操作をすべてのアン
カー3について行い、最後に、アンカーヘッド38と緊
張装置32等をアンカープレート20から撤去する。な
お、くさび37の撤去と、カプラー34の結合及び分離
操作は、取付部材33の窓孔33aから行う。In the above state, the tensioning device 32 is actuated to pull the anchor 3 and the halved wedge 37 is pulled out from the hole (not shown) of the anchor head 38 as shown in FIG. This operation is performed for all the anchors 3, and finally, the anchor head 38, the tensioning device 32 and the like are removed from the anchor plate 20. The wedge 37 is removed and the coupler 34 is connected and separated through the window 33a of the mounting member 33.
【0031】その後、取付け位置自在のアンカー用ねじ
式定着具1を用い、前述の図3ないし図9の手順でアン
カー3を再定着する。したがって、再定着の場合のアン
カー定着構造は、新規定着の場合(図9)と同一とな
る。Thereafter, the anchor type screw anchoring device 1 which can be freely mounted is used to re-fix the anchor 3 in the procedure shown in FIGS. Therefore, the anchor fixing structure for re-fixing is the same as that for new fixing (FIG. 9).
【0032】図では7本のアンカー(PC鋼撚り線)3
が使用されているが(図10以外は、2本しか示されて
いない。)、アンカー3の使用本数は、任意であり、7
本よりも多いことも少ないこともある。参考までに述べ
ると、図の取付け位置自在のアンカー用ねじ式定着具1
は、長さが400mm、太さ(外径)が70mm、挿通
孔1aの上端側の内径が45mm。下端側の最小内径が
43mm(したがって、テーパの勾配は、約1/40
0)、となっているが、これに限られるものではなく、
要求条件や用途等によって様々に変更されることは言う
までもない。In the figure, 7 anchors (PC steel stranded wire) 3
Is used (only two are shown except FIG. 10), but the number of anchors 3 used is arbitrary, and
It may be more or less than books. For reference, a screw-type fixing device 1 for an anchor whose mounting position is freely shown in the figure
Has a length of 400 mm, a thickness (outer diameter) of 70 mm, and an inner diameter on the upper end side of the insertion hole 1a is 45 mm. The minimum inner diameter on the lower end side is 43 mm (thus, the taper slope is about 1/40
0), but is not limited to this,
Needless to say, it may be changed in various ways depending on the requirements, usage, etc.
【0033】[0033]
【発明の効果】以上説明したように、請求項1記載の発
明によれば、取付け位置自在のアンカー用ねじ式定着具
の固結を現場で行うため、継ぎ足しやアンカープレート
のかさ上げを行うことなく、取付け位置自在のアンカー
用ねじ式定着具を緊張状態のアンカーの最適位置に取り
付けて、定着作業を能率よく行うことができる。As described above, according to the first aspect of the present invention, since the screw-type fixing device for anchors which can be freely attached at the mounting position is solidified on site, the replenishment and the raising of the anchor plate are performed. Instead, it is possible to efficiently perform the fixing work by attaching the screw type fixing device for anchors which can be freely attached at the optimum position of the tensioned anchor.
【0034】また、請求項1記載の取付位置自在のアン
カー用ねじ式定着具の構成では、粗面がエポキシ樹脂の
付着力を強め、また、アンカーに対する緊張力が、挿通
孔が窄まる方向に加わるため、エポキシ樹脂の固定力が
強くなり、また安定する。Further, an unmountable mounting position according to claim 1 is provided.
In the structure of the screw fixing device for car, the rough surface strengthens the adhesive force of the epoxy resin, and the tension force to the anchor is applied in the direction in which the insertion hole is narrowed, so the fixing force of the epoxy resin becomes strong and stable. To do.
【0035】また、エポキシ樹脂による取付け位置自在
のアンカー用ねじ式定着具の固結を現場で行うため、継
ぎ足しやアンカープレートのかさ上げを行うことなく、
取付け位置自在のアンカー用ねじ式定着具を緊張状態の
アンカーの最適位置に取り付けて、定着作業を能率よく
行うことができる。 Further, in order to perform the consolidation of the mounting position freely anchoring screw-type fixing tool according to the epoxy resin in situ, without the raising of replenishment and the anchor plate,
It is possible to efficiently perform the fixing work by mounting the screw type fixing device for an anchor, which can be freely attached at the attaching position, at the optimum position of the anchor in the tension state.
【0036】また、くさびで定着された既設アンカーを
再度緊張させることができ、しかも再緊張後はマンショ
ン式となるため、メンテナンスが容易になる。Further, the existing anchor fixed by the wedge can be re-tensioned, and after the re-tensioning, it becomes a condominium type, which facilitates maintenance.
【0037】また、エポキシ樹脂を、エポキシ化合物と
硬化剤及びグラスファイバーやカーボンファイバー等の
繊維を混合したものとした場合は、混入繊維によって固
結力とその信頼性が向上する。When the epoxy resin is a mixture of an epoxy compound, a curing agent, and fibers such as glass fibers and carbon fibers, the mixed fibers improve the cohesive strength and its reliability.
【0038】請求項2記載の発明によれば、作業際が良
く、既設のアンカーに容易に実施することができ、維持
管理がしやすい優れた既設アンカーの定着構造を提供す
ることができる。According to the second aspect of the present invention, it is possible to provide an excellent anchoring structure for an existing anchor that is easy to work with, can be easily applied to an existing anchor, and is easy to maintain and manage.
【図1】 本発明に係る取付け位置自在のアンカー用ね
じ式定着具の実施の形態を示す断面図である。FIG. 1 is a cross-sectional view showing an embodiment of a screw-type fixing device for an anchor according to the present invention, which can be freely attached at a mounting position.
【図2】 図1の取付け位置自在のアンカー用ねじ式定
着具に螺着される定着ナットの断面図である。FIG. 2 is a cross-sectional view of a fixing nut screwed to the screw-type fixing device for an anchor whose mounting position is freely adjustable in FIG.
【図3】 アンカーに対するブチルゴムの取付け例を示
す図である。FIG. 3 is a diagram showing an example of attaching butyl rubber to an anchor.
【図4】 図1の取付け位置自在のアンカー用ねじ式定
着具をアンカーに装着した状態を示す断面図である。FIG. 4 is a cross-sectional view showing a state in which the anchor-type screw-type fixing device of FIG.
【図5】 エポキシ樹脂の混合方法の例を示す図であ
る。FIG. 5 is a diagram showing an example of a method for mixing epoxy resins.
【図6】 取付け位置自在のアンカー用ねじ式定着具の
挿通孔に対するエポキシ樹脂の注入例を示す断面図であ
る。FIG. 6 is a cross-sectional view showing an example of injecting an epoxy resin into an insertion hole of a screw-type fixing device for an anchor whose mounting position can be freely adjusted.
【図7】 止水材による止水状態の一例を示す図であ
る。FIG. 7 is a diagram showing an example of a water-stop state by a water-stop material.
【図8】 アンカーの緊張操作例を示す図である。FIG. 8 is a diagram showing an example of an anchor tension operation.
【図9】 本発明に係るアンカーの定着構造の実施の形
態を示す図である。FIG. 9 is a diagram showing an embodiment of an anchor fixing structure according to the present invention.
【図10】 本発明に係る取付け位置自在のアンカー用
ねじ式定着具と定着ナット及びアンカーの関係を示す図
である。FIG. 10 is a view showing a relationship between a screw-type fixing device for an anchor, a fixing nut, and an anchor according to the present invention, which can be freely attached at a mounting position.
【図11】 既設アンカーからのくさびの取外し例を示
す図である。FIG. 11 is a diagram showing an example of removing a wedge from an existing anchor.
1 定着具 1a 挿通孔 1b 雄ねじ 1c 注入孔 1d,1f 粗面 3 アンカー 5 定着ナット 7 エポキシ樹脂 7a エポキシ化合物 7b 硬化剤 9 穴 20 アンカープレート 20a 貫通孔 22,32 緊張装置 37 くさび 38 アンカーヘッド 1 Fixing tool 1a Insertion hole 1b Male screw 1c Injection hole 1d, 1f rough surface 3 anchor 5 Fixing nut 7 Epoxy resin 7a Epoxy compound 7b Curing agent 9 holes 20 anchor plate 20a through hole 22, 32 tensioning device 37 Wedge 38 Anchor head
Claims (2)
アンカーの先端を鋼線カプラ−で掴んで緊張装置に該既
設アンカーを結合し、該既設アンカーを緊張装置で引っ
張ることにより、それまで既設アンカーを、アンカープ
レートにアンカーヘッドを介して定着させていたくさび
をアンカーヘッドから抜き出し、この操作をすべての既
設アンカーについて行い、そのくさびとアンカーヘッド
を既設アンカーから撤去する前工程と、 取付位置自在のアンカー用ねじ式定着具の挿通孔に既設
アンカーを挿通させ、エポキシ樹脂を注入孔から挿通孔
に注入して現場で既設アンカーを取付位置自在のアンカ
ー用ねじ式定着具に固結する工程と、 アンカープレートの貫通孔に挿通された上記取付位置自
在のアンカー用ねじ式定着具を緊張装置で引っ張って上
記既設アンカーを再緊張させる工程と、 取付位置自在のアンカー用ねじ式定着具に螺着された定
着ナットを締め付けて緊張状態の既設アンカーをアンカ
ープレートに定着させる工程とを具備し、前記取付位置自在のアンカー用ねじ式定着具として、中
心に既設アンカーを挿通させる挿通孔が形成されるとと
もに、外周面に定着ナットが螺着される雄ねじが形成さ
れ、一端部の側部に上記挿通孔にエポキシ樹脂を注入す
る注入孔が形成された鋳物製の取付位置自在のアンカー
用ねじ式定着具であって、前記挿通孔が、注入孔が形成
された一端部に近づくにしたがって窄まるテーパ状とさ
れ、かつ挿通孔の内面が粗砂の中子の使用によって粗面
とされた取付位置自在のアンカー用ねじ式定着具を用い
る ことを特徴とするアンカーの定着方法。1.One of the existing anchors
Hold the tip of the anchor with a steel wire coupler and attach it to the tensioning device.
Connect the anchors,Tension the existing anchor with a tension device.
The existing anchors can be
The wedge that was fixed to the rate via the anchor head
Pull out from the anchor head,Repeat this operation for all
Perform the installation anchor,The wedge and anchor head
And the previous step of removing from the existing anchor, Already installed in the insertion hole of the screw type fixing device for anchors that can be freely attached
Insert the anchor and insert the epoxy resin through the injection hole
Anchors that can be attached to the existing anchors by injecting
-Screw fixing device for fixing The above-mentioned mounting position inserted in the through hole of the anchor plate
Pull up the existing anchor screw type anchor with a tension device.
The process of re-tensioning the existing anchor, Fixed type screwed onto a screw type anchoring device for anchors that can be mounted at any position.
Tighten the mounting nut to anchor the existing tensioned anchor.
-Fixing the plateAs a screw-type fixing device for anchors that can be attached at any position,
When an insertion hole for inserting the existing anchor is formed in the heart
On the outer peripheral surface, a male screw to which the fixing nut is screwed is formed.
And inject epoxy resin into the insertion hole on the side of one end.
Anchor made of casting with free mounting position
A screw-type fixing device for use, wherein the insertion hole forms an injection hole.
Taper that narrows as it approaches the one end
And the inner surface of the insertion hole is rough due to the use of a coarse sand core.
Using a screw type anchoring device for anchors that can be freely attached
Ru An anchor fixing method characterized by the above.
って定着されたことを特徴とするアンカーの定着構造。2. An anchor fixing structure fixed by the anchor fixing method according to claim 1 .
Priority Applications (1)
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JP2000340510A JP3459629B2 (en) | 2000-11-08 | 2000-11-08 | Anchor anchoring method and anchor anchoring structure |
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Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000340510A JP3459629B2 (en) | 2000-11-08 | 2000-11-08 | Anchor anchoring method and anchor anchoring structure |
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JP2002146783A JP2002146783A (en) | 2002-05-22 |
JP3459629B2 true JP3459629B2 (en) | 2003-10-20 |
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