JP2020183618A - Inspection structure for ground anchor head - Google Patents

Inspection structure for ground anchor head Download PDF

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JP2020183618A
JP2020183618A JP2019086639A JP2019086639A JP2020183618A JP 2020183618 A JP2020183618 A JP 2020183618A JP 2019086639 A JP2019086639 A JP 2019086639A JP 2019086639 A JP2019086639 A JP 2019086639A JP 2020183618 A JP2020183618 A JP 2020183618A
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screw
tendon grip
fitted
grip
tendon
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JP7244833B2 (en
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中村　真也
Shinya Nakamura
真也 中村
淳 翁長
Jun Onaga
淳 翁長
山崎　勉
Tsutomu Yamazaki
勉 山崎
康治 東
Yasuharu Higashi
康治 東
理 小町
Osamu Komachi
理 小町
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ASAHI KENSETSU KK
Chatan Nakamura Gk
Sansui Navico Co Ltd
University of the Ryukyus NUC
Japan Conservation Engineers Co Ltd
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ASAHI KENSETSU KK
Chatan Nakamura Gk
Sansui Navico Co Ltd
University of the Ryukyus NUC
Japan Conservation Engineers Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/23—Dune restoration or creation; Cliff stabilisation

Abstract

To provide an inspection structure for a ground anchor head that can be installed without covering the anchor head with a protective cap to visually inspect the entire anchor head and protect the head without a cap.SOLUTION: An inspection structure of an anchor head is configured by fitting an adhesive ECF strand 2 protruding from an anchor plate 1 into a stainless steel tendon grip 3 having screws 4 and 5 inside and outside the cylinder, fitting a compression coil spring-shaped or wire ring cylindrical rockfall protector 6 to the tendon grip 3, and screwing a screw stopper 7 into an inner diameter screw 5 of the tendon grip at the tip of the tendon grip, or screwing a screw lid into the outer diameter screw 4.SELECTED DRAWING: Figure 1

Description

本発明は、グラウンドアンカー頭部の点検構造に関し、アンカー頭部を保護する頭部キャップを被せないで設置してアンカー頭部全体を目視点検できると共に、その頭部を頭部キャップなしで保護できるようにしたものである。 The present invention relates to the inspection structure of the ground anchor head, and can be installed without covering the head cap that protects the anchor head to visually inspect the entire anchor head and protect the head without the head cap. It is something like that.

一般に、グラウンドアンカーの頭部は、保護するための保護キャップを被せた内部にはアンカー頭部のＰＣ鋼より線や定着クサビ及びアンカーヘッドなど、頭部部材の腐食を防止するために防錆材を充填している。 Generally, the head of the ground anchor is covered with a protective cap to protect it. Inside, a rust preventive material is used to prevent corrosion of head members such as PC steel strands of the anchor head, fixing wedges, and anchor head. Is filled.

そのグラウンドアンカーにおける不具合が発生する個所の９０％以上は頭部及び頭部背面であるといわれている。これらを日常的に又は定期的に又は異常発生時に目視で点検後、健全性調査を実施して、破損・劣化部材などを補修することで、現在のグラウンドアンカーと同等の防食性能まで向上させることが可能になる。 It is said that 90% or more of the places where defects occur in the ground anchor are the head and the back of the head. After visually inspecting these on a daily or regular basis or when an abnormality occurs, conduct a soundness survey and repair damaged or deteriorated members to improve the anticorrosion performance equivalent to the current ground anchor. Becomes possible.

上記の目視による点検は、アンカー頭部を保護するために被せられている頭部キャップを取り外して内部を目視点検することは通常であった。従来のキャップは分厚い板厚で重いものであったため、その脱着は面倒である共に、のり面などの足場の悪い場所や高所での作業には危険が伴っていた。また、補修時での劣化防錆材の除去及び新規防錆材の充填作業についても手間を要していた。 In the above visual inspection, it was usual to remove the head cap covered to protect the anchor head and visually inspect the inside. Since the conventional cap is thick and heavy, it is troublesome to put on and take off, and there is a danger in working in a place with poor footing such as a slope or in a high place. In addition, it takes time and effort to remove the deteriorated rust preventive material at the time of repair and to fill the new rust preventive material.

そこで、従来においても保護キャップを外さず、被せたままの状態でアンカー頭部の点検に関する提案は行われている。 Therefore, even in the past, proposals have been made regarding the inspection of the anchor head without removing the protective cap and keeping it covered.

特許文献１は、アンカー端部の健全性のチェックを頭部背面の分解を必要とせず、容易に目視チェックすることができる頭部背面の構造を提供する。 Patent Document 1 provides a structure of the back surface of the head that can be easily visually checked without disassembling the back surface of the head to check the soundness of the anchor end portion.

特許文献２は、グラウンドアンカー頭部構造に関し、その頭部及び頭部背面構造を分解することを必要とせずに、アンカーヘッド上方の領域におけるテンドンの状態を容易に視認（目視）することができるものである、としている。 Patent Document 2 relates to the ground anchor head structure, and the state of the tendon in the region above the anchor head can be easily visually recognized (visually) without the need to disassemble the head and the back surface structure of the head. It is said that it is a thing.

特許文献３は、施工現場で作業者がどの様な位置から見ても定着具、テンドン、防錆材（グリースなど）を視認或いは目視することが出来るアンカー頭部維持管理構造と、それを施工及び管理方法である。 Patent Document 3 describes an anchor head maintenance structure that allows an operator to visually or visually recognize a fixing tool, tendon, and rust preventive material (grease, etc.) from any position at a construction site, and the construction thereof. And the management method.

特許文献４は、頭部キャップを取り外すことなく内部の観察を可能にし、しかも内部に充填された防錆油の劣化を防止することができるアンカー用頭部キャップと、これを点検する方法である。 Patent Document 4 is a head cap for an anchor that enables observation of the inside without removing the head cap and can prevent deterioration of the rust preventive oil filled inside, and a method for inspecting the cap. ..

特許第４７９３９５２号公報Japanese Patent No. 4793952 特開２０１４−１２５７６９号公報Japanese Unexamined Patent Publication No. 2014-125769 特開２０１７−１０６１８８号公報JP-A-2017-106188 特開２０１８−１３５７４２号公報JP-A-2018-135742

上記特許文献１〜４は、いずれもキャップの一部に窓を設けて目視点検をする構造であるが、アンカー頭部に保護キャップを被せた状態であるから、内部をくまなく全体を目視することは困難である。そこで、アンカー頭部に被せる保護キャップをなくせばアンカー頭部全体を目視点検することができる。ただし、この場合は、アンカー頭部を設置場所における落石などから防がなければならない。そこで、本発明は、アンカー頭部にキャップそのものを被せないでもアンカー頭部を保護管理できるようにしたものである。 All of the above-mentioned Patent Documents 1 to 4 have a structure in which a window is provided in a part of the cap for visual inspection, but since the anchor head is covered with a protective cap, the entire inside is visually inspected. That is difficult. Therefore, if the protective cap that covers the anchor head is removed, the entire anchor head can be visually inspected. However, in this case, the anchor head must be protected from falling rocks at the installation site. Therefore, the present invention makes it possible to protect and manage the anchor head without covering the anchor head with the cap itself.

本発明の第１は、アンカー頭部の点検構造において、アンカープレートから突出したＥＣＦストランドを筒形の内外にねじを設けたステンレス製テンドングリップを嵌合し、そのテンドングリップに圧縮コイルばねからなる落石プロテクタを嵌合し、当該テンドングリップの先端に有する内径ねじにねじ栓を螺合してなるものである。 The first aspect of the present invention is that in the inspection structure of the anchor head, the ECF strand protruding from the anchor plate is fitted with a stainless steel tendon grip having screws inside and outside the cylinder, and the tendon grip is composed of a compression coil spring. A rockfall protector is fitted, and a screw plug is screwed into the inner diameter screw held at the tip of the tendon grip.

本発明の第２は、アンカー頭部の点検構造において、アンカープレートから突出したＥＣＦストランドを筒形の内外にねじを設けたステンレス製テンドングリップに嵌入し、そのテンドングリップに線輪円筒状の落石プロテクタを嵌合し、当該テンドングリップの先端に有する内径ねじにねじ栓を螺合してなるものである。 The second aspect of the present invention is that in the inspection structure of the anchor head, the ECF strand protruding from the anchor plate is fitted into a stainless steel tendon grip having screws inside and outside the cylinder, and a wire ring cylindrical rockfall is inserted into the tendon grip. A protector is fitted, and a screw plug is screwed into an inner diameter screw held at the tip of the tendon grip.

本発明の第３は、アンカー頭部の点検構造において、アンカープレートから突出したＥＣＦストランドを筒形の内外にねじを設けたステンレス製テンドングリップに嵌入し、そのテンドングリップに圧縮コイルばねを嵌合し、当該テンドングリップの先端の外径ねじにねじ蓋を螺合してなるものである。 In the third aspect of the present invention, in the inspection structure of the anchor head, the ECF strand protruding from the anchor plate is fitted into a stainless steel tendon grip having screws inside and outside the cylinder, and a compression coil spring is fitted into the tendon grip. However, the screw lid is screwed into the outer diameter screw at the tip of the tendon grip.

本発明は上記の構成であるから、次のような効果がある。
第１に、アンカープレートから突出しているテンドングリップには保護キャップを被せていないので、日常的又は定期的又は異常発生時の点検において、テンドングリップの全方位を目視することができる。また、定着ナット、球面座金の状態も一目で点検できる。なお、点検時に目視できないが、テンドングリップに嵌入しているＥＣＦストランド（内部充填型エポキシ樹脂被覆ＰＣ鋼より線）は定着用膨張材で把持する構造としており、十分な耐食性を有していることから長期の年月を経過しても腐食する恐れがない。
第２に、テンドングリップはステンレス製であるから、従来被せていた防錆保護キャップを用いないで長期の年月を経過してもテンドングリップが腐食する恐れがなくなり、維持管理が容易確実である。
第３に、ステンレス製のテンドングリップの外径にねじ山が設けられており、そのまま露出した状態では、設置した後に、法面からの崩落による小石などがテンドングリップに当たってねじ山を潰す恐れがあるが、圧縮コイルばね状や線輪円筒状のプロテクタ又は圧縮コイルばね自体が当該テンドングリップの外径全長にわたって嵌合しているから外径ねじを潰す恐れがなくなる。
第４に、テンドングリップの頭部先端において、その内径ねじにプロテクタ受け座付きねじ栓又は外径ねじにプロテクタ受け座付きねじ蓋を螺合したから、当該テンドングリップの内径ねじを保護すると共に、テンドングリップに嵌合した圧縮コイルばねの脱落を防止することができる。
第５に、圧縮コイルばねは、テンドングリップと同様にステンレス製であるから、保護キャップを被せなくても、腐食することないことは勿論のこと、圧縮コイルばねのすき間を通じてテンドングリップの状態を目視できるから、栓ねじや蓋ねじを外さなくても点検観察を行うことができる。 Since the present invention has the above configuration, it has the following effects.
First, since the tendon grip protruding from the anchor plate is not covered with a protective cap, the tendon grip can be visually observed in all directions in daily or regular inspections or when an abnormality occurs. In addition, the condition of the fixing nut and spherical washer can be checked at a glance. Although it is not visible at the time of inspection, the ECF strand (internally filled epoxy resin-coated PC steel stranded wire) fitted in the tendon grip has a structure to be gripped by a fixing expansion material and has sufficient corrosion resistance. There is no risk of corrosion even after a long period of time.
Secondly, since the tendon grip is made of stainless steel, there is no risk of the tendon grip corroding even after a long period of time without using the rust preventive protective cap that was conventionally covered, and maintenance is easy and reliable. ..
Thirdly, a thread is provided on the outer diameter of the stainless steel tendon grip, and if it is exposed as it is, pebbles due to collapse from the slope may hit the tendon grip and crush the screw thread after installation. However, since the compression coil spring-shaped or wire ring cylindrical protector or the compression coil spring itself is fitted over the entire outer diameter of the tendon grip, there is no risk of crushing the outer diameter screw.
Fourth, at the tip of the head of the tendon grip, a screw plug with a protector receiving seat is screwed into the inner diameter screw or a screw lid with a protector receiving seat is screwed into the outer diameter screw, so that the inner diameter screw of the tendon grip is protected and the tendon grip is protected. It is possible to prevent the compression coil spring fitted in the above from falling off.
Fifth, since the compression coil spring is made of stainless steel like the tendon grip, it does not corrode even if it is not covered with a protective cap, and the state of the tendon grip is visually observed through the gap of the compression coil spring. Therefore, inspection and observation can be performed without removing the plug screw and lid screw.

本発明の実施状態を示す概略断面図である。It is the schematic sectional drawing which shows the embodiment of this invention. 図１から圧縮コイルばねとねじ栓を除いたアンカー頭部の斜視図である。It is a perspective view of the anchor head excluding the compression coil spring and the screw plug from FIG. 図1の頭部部分の斜面図である。It is the slope view of the head part of FIG. 圧縮コイルばね状プロテクタの斜視図である。It is a perspective view of the compression coil spring-like protector. 線輪円筒状プロテクタの斜視図である。It is a perspective view of the wire ring cylindrical protector. テンドングリップの内径ねじに螺合するねじ栓と座金の側面図である。It is a side view of a screw stopper and a washer screwed into the inner diameter screw of a tendon grip. 圧縮コイルばねを嵌合し、ねじ蓋を螺合したテンドングリップの斜面図である。It is a slope view of the tendon grip in which a compression coil spring is fitted and a screw lid is screwed. テンドングリップの外径ねじに螺合するねじ蓋の縦断面図である。It is a vertical sectional view of a screw lid screwed with the outer diameter screw of a tendon grip.

本発明に係るグラウンドアンカー頭部の点検構造の形態は次のとおりである。すなわち、アンカープレートから突出して露呈したＥＣＦストランドを筒形の内外にねじを設けたステンレス製テンドングリップに嵌入し、そのテンドングリップに圧縮コイルばねからなる落石プロテクタを嵌合し、当該テンドングリップ先端の内径ねじにねじ栓を螺合し、又は当該テンドングリップ先端の外径ねじにねじ蓋を螺合してなるものである。 The form of the inspection structure of the ground anchor head according to the present invention is as follows. That is, the ECF strand protruding from the anchor plate is fitted into a stainless steel tendon grip having screws inside and outside the cylinder, and a rockfall protector made of a compression coil spring is fitted into the tendon grip to fit the tip of the tendon grip. A screw plug is screwed into the inner diameter screw, or a screw lid is screwed into the outer diameter screw at the tip of the tendon grip.

次に本発明に係るグラウンドアンカー頭部の点検構造の実施例を図面に沿って説明する。図において、１は地盤の表面Ｎに設置したアンカープレート、２はアンカープレート１から突出して露呈している付着型ＥＣＦストランドである。ここにいうＥＣＦストランドとは、内部充填型エポキシ樹脂被覆ＰＣ鋼より線のことを意味し、エポキシ樹脂を防食被覆としてのＰＣ鋼材のことである。３はＥＣＦストランド２に、その頭部側先端から嵌合するステンレス製の円筒形テンドングリップである。なお、当該テンドングリップ３は、工事施工現場の条件によって、図１と図３、図７に示すようにその突出長さが異なるものである。
４はテンドングリップ３の外径に全長にわたって設けた外径ねじである。５はそのテンドングリップ３の頭部先端部外径に設けた外径ねじであり、テンドングリップ３の頭部先端からねじ栓の雄ねじ７１が収まる長さに設けてある。 Next, an example of the inspection structure of the ground anchor head according to the present invention will be described with reference to the drawings. In the figure, 1 is an anchor plate installed on the surface N of the ground, and 2 is an adhesive type ECF strand protruding from the anchor plate 1 and exposed. The ECF strand referred to here means an internally filled epoxy resin-coated PC steel stranded wire, and is a PC steel material using an epoxy resin as an anticorrosion coating. Reference numeral 3 denotes a stainless steel cylindrical tendon grip that fits into the ECF strand 2 from the tip on the head side thereof. The tendon grip 3 has a different protruding length as shown in FIGS. 1, 3 and 7 depending on the conditions of the construction site.
Reference numeral 4 denotes an outer diameter screw provided on the outer diameter of the tendon grip 3 over the entire length. 5 is the outer diameter thread provided on the head distal end outer diameter of the tendon grip 3, is provided from the head distal end of the tendon grip 3 to the male screw 7 1 length to fit the screw plug.

６はＰＣ鋼より線１に嵌合する圧縮コイルばね又は線輪の円筒状からなる落石プロテクタである。図４に示すものは、単一本のコイルばねにしたものである。当該圧縮コイルばねの線径は７ｍｍ、各コイルばね線間の間隔は１５ｍｍに設定してある。また、線輪円筒状は複数のリングを等間隔に配置し、その複数のリングの外形に複数本の細棒体６１を渡して溶接等で接合してある（図５）。 Reference numeral 6 denotes a rockfall protector made of a compression coil spring or a cylindrical wire ring that fits into the PC steel stranded wire 1. The one shown in FIG. 4 is a single coil spring. The wire diameter of the compression coil spring is set to 7 mm, and the distance between the coil spring wires is set to 15 mm. Further, Senwa cylindrically are joining a plurality of rings arranged at regular intervals, to the contour of the plurality of rings by passing the thin rod member 61 of the plurality of welding or the like (FIG. 5).

上記の落石プロテクタ６は、円筒形テンドングリップ３の長さに合わせて、その全長を覆う長さに設定し、形状は円筒状を成し、その内径はテンドングリップ３の外径より大径になっているため、これを嵌合すると両者３・６に適度の隙間ｇが形成されるから、これが外径ねじ４に接触して傷つけるような恐れがない。 The rockfall protector 6 is set to a length that covers the entire length of the cylindrical tendon grip 3 in accordance with the length of the cylindrical tendon grip 3, has a cylindrical shape, and has an inner diameter larger than the outer diameter of the tendon grip 3. Therefore, when this is fitted, an appropriate gap g is formed in both 3.6, so that there is no risk that this will come into contact with the outer diameter screw 4 and be damaged.

なお、図８にあっては、ねじ蓋８の細径部と定着ナット１０の細径部に落石プロテクタ６を構成する圧縮コイルばねの両端を嵌合することにより、テンドングリップ３の外径と圧縮コイルバネ６の内径との隙間ｇが均等に確保され、当該コイルばねが外径ねじ４に接触して傷付けることは全くなくなる。 In FIG. 8, both ends of the compression coil spring constituting the rock fall protector 6 are fitted to the small diameter portion of the screw lid 8 and the small diameter portion of the fixing nut 10 to obtain the outer diameter of the tendon grip 3. The gap g with the inner diameter of the compression coil spring 6 is evenly secured, and the coil spring is not in contact with the outer diameter screw 4 and is not damaged at all.

７はテンドングリップ３の先端の内径ねじ５に螺合する雄ねじ７１を有しているねじ栓であり、その大径部７ｎで落石プロテクタ６を成形する圧縮コイルばね又は線輪円筒体の端部の受け座となっている（図６）。８は当該テンドングリップ３の先端の外径ねじ４に螺合する雌ねじ８１を有するねじ蓋であり、その大径部８ｎで落石プロテクタ６を成形する圧縮コイルばね又は線輪円筒体の端部の受け座となっている（図７及び図９）。９はアンカープレート１の穴９１に嵌めたテンドングリップの保護管９ｎ付きの球面型の座金、１０はテンドングリップに螺合して球面座金を締め付ける定着ナット、１１はテンドングリップ３内において充填したＥＣＦストランド２を把持するための定着用膨張材を示す。 Reference numeral 7 denotes a screw stopper having a male screw 7 1 screwed into the inner diameter screw 5 at the tip of the tendon grip 3, and the end of a compression coil spring or a wire ring cylinder that forms the rockfall protector 6 with the large diameter portion 7n thereof. It serves as a seat for the section (Fig. 6). 8 is a screw cap having an internal thread 81 which is screwed to the outer diameter thread 4 of the tip of the tendon grip 3, the ends of the compression coil spring or Senwa cylinder forming the rockfall protector 6 at the large diameter portion 8n (Figs. 7 and 9). 9 is a spherical washer with a protective tube 9n of the tendon grip fitted in the hole 9 1 of the anchor plate 1, 10 is a fixing nut screwed into the tendon grip to tighten the spherical washer, and 11 is filled in the tendon grip 3. The fixing expansion material for gripping the ECF strand 2 is shown.

[具体的な設置例]
上記構成において、土中の掘削孔に予めテンドングリップ３に定着用膨張材１１でＥＣＦストランド２を把持して組立てた、グラウンドアンカー体を装入し、アンカープレート１及びこれに重ねた球面座金９の孔９１からのり面外方に突出し、そのテンドングリップ３の外径ねじ４に定着ナット１０を螺合し、球面座金９を介してアンカープレート１を強固に締め付けてのり面Ｎに押圧定着する。 [Specific installation example]
In the above configuration, the ground anchor body assembled by gripping the ECF strand 2 with the fixing expansion material 11 in advance in the tendon grip 3 is charged into the excavation hole in the soil, and the anchor plate 1 and the spherical washer 9 stacked on the anchor plate 1 are charged. protrudes from the hole 9 1 slopes outwardly screwed fixing nut 10 to the outer diameter thread 4 of the tendon grip 3, pressing fixing firmly tighten the anchor plate 1 via a spherical washer 9 the glue surface N To do.

この状態でテンドングリップ３に圧縮コイルばね又は線輪円筒状からなる落石プロテクタ６を嵌合し、テンドングリップ先端の内径ねじ５にねじ栓７を、又は外径ねじ４にねじ蓋８を螺合する。 In this state, a compression coil spring or a rockfall protector 6 made of a cylindrical wire ring is fitted to the tendon grip 3, and a screw stopper 7 is screwed into the inner diameter screw 5 at the tip of the tendon grip, or a screw lid 8 is screwed into the outer diameter screw 4. To do.

これによって、のり面Ｎに設置した後、日常点検、定期的点検、異常時発生時の点検において、在来のアンカー頭部の一部の設けた目視窓付きキャップの点検に比較して露出したコイルばね状の落石防止プロテクタ付きのテンドングリップ３、定着ナット１０、球面座金９の全方位を目視点検することができる。 As a result, after installation on the slope N, it was exposed in daily inspections, regular inspections, and inspections in the event of an abnormality compared to the inspection of a cap with a visual window provided on a part of the conventional anchor head. It is possible to visually inspect all directions of the tendon grip 3, the fixing nut 10, and the spherical washer 9 with a coil spring-shaped rock fall prevention protector.

１…アンカープレート
２…ＥＣＦストランド
３…テンドングリップ
４…外径ねじ
５…内径ねじ
６…落石プロテクタ
６１…細棒体
７…ねじ栓
７１…ねじ栓の雄ねじ
７n…ねじ栓の大径部
８…ねじ蓋
８１…ねじ蓋の雌ねじ
８ｎ…ねじ蓋の大径部
９…球面座金（テンドングリップ保護管９ｎ付き）
９１…孔
１０…定着ナット
１１…定着用膨張材 1 ... Anchor plate 2 ... ECF strand 3 ... Tendon grip 4 ... Outer diameter screw 5 ... Inner diameter screw 6 ... Rockfall protector 6 1 ... Thin rod body 7 ... Screw plug 7 1 ... Male screw of screw plug 7n ... Large diameter part of screw plug 8 ... Screw lid 8 1 ... Female screw of screw lid 8n ... Large diameter part of screw lid 9 ... Spherical seat (with tendon grip protection tube 9n)
9 1 ... Hole 10 ... Fixing nut 11 ... Expansion material for fixing

Claims (3)

アンカープレート（１）から突出したＥＣＦストランド（２）を外径ねじ（４）・内径ねじ（５）を設けたステンレス製で筒形のテンドングリップ（３）に嵌入し、そのテンドングリップ（３）に圧縮コイルばね状の落石プロテクタ（６）を嵌合し、当該テンドングリップの先端に設けた内径ねじ（５）にねじ栓（７）を螺合してなることを特徴とするアンカー頭部の点検構造。 The ECF strand (2) protruding from the anchor plate (1) is fitted into a stainless steel tubular tendon grip (3) provided with an outer diameter screw (4) and an inner diameter screw (5), and the tendon grip (3) is fitted. A compression coil spring-shaped rock fall protector (6) is fitted into the anchor head, and a screw stopper (7) is screwed into an inner diameter screw (5) provided at the tip of the tendon grip. Inspection structure. アンカープレート（１）から突出したＥＣＦストランド（２）を外径ねじ（４）・内径ねじ（５）を設けた筒形のステンレス製テンドングリップ（３）に嵌入し、そのテンドングリップに線輪円筒状の落石プロテクタ（６）を嵌合し、当該テンドングリップ（３）の先端に有する内径ねじ（５）にねじ栓（７）を螺合してなることを特徴とするアンカー頭部の点検構造。 The ECF strand (2) protruding from the anchor plate (1) is fitted into a tubular stainless steel tendon grip (3) provided with an outer diameter screw (4) and an inner diameter screw (5), and a wire ring cylinder is fitted into the tendon grip. An anchor head inspection structure characterized in that a rockfall protector (6) is fitted and a screw stopper (7) is screwed into an inner diameter screw (5) held at the tip of the tendon grip (3). .. アンカープレート（１）から突出したＥＣＦストランド（２）を筒形の内外に外径ねじ（４）・内径ねじ（５）を設けたステンレス製テンドングリップ（３）に嵌入し、そのテンドングリップに圧縮コイルばね状又は線輪円筒状の落石プロテクタ（６）を嵌合し、当該テンドングリップ（３）の先端の外径ねじ（４）にねじ蓋（８）を螺合してなることを特徴とするアンカー頭部の点検構造。 The ECF strand (2) protruding from the anchor plate (1) is fitted into a stainless steel tendon grip (3) provided with outer diameter screws (4) and inner diameter screws (5) inside and outside the cylinder, and compressed into the tendon grip. A coil spring-shaped or wire ring cylindrical rock fall protector (6) is fitted, and a screw lid (8) is screwed into an outer diameter screw (4) at the tip of the tendon grip (3). Inspection structure of the anchor head.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS635037U (en) * 1986-06-27 1988-01-13
JPH06248646A (en) * 1993-02-24 1994-09-06 Shimizu Corp Installation structure for earth anchor
JPH10266200A (en) * 1997-03-28 1998-10-06 Moriya Koki Kk Preparation method of ground anchor, preparation method of lock bolt and these pressure-receiving structure
JP2002004275A (en) * 2000-06-26 2002-01-09 Okabe Co Ltd Execution method of anchor for withstanding horizontal force and anchor for withstanding horizontal force
JP2009185551A (en) * 2008-02-07 2009-08-20 Okabe Co Ltd Pressure receiving device
JP2013234501A (en) * 2012-05-09 2013-11-21 Daika:Kk Anchoring nut used for slope stabilization method, and slope stabilization structure and slope stabilization method using the anchoring nut
JP2017141570A (en) * 2016-02-08 2017-08-17 国立大学法人 琉球大学 Structure of metallic ground anchor using pc steel strand coated with epoxy resin, production method and installation method
EP3396069A1 (en) * 2017-04-28 2018-10-31 Prometec S.r.l. Anchoring head for an anchoring rod

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS635037U (en) * 1986-06-27 1988-01-13
JPH06248646A (en) * 1993-02-24 1994-09-06 Shimizu Corp Installation structure for earth anchor
JPH10266200A (en) * 1997-03-28 1998-10-06 Moriya Koki Kk Preparation method of ground anchor, preparation method of lock bolt and these pressure-receiving structure
JP2002004275A (en) * 2000-06-26 2002-01-09 Okabe Co Ltd Execution method of anchor for withstanding horizontal force and anchor for withstanding horizontal force
JP2009185551A (en) * 2008-02-07 2009-08-20 Okabe Co Ltd Pressure receiving device
JP2013234501A (en) * 2012-05-09 2013-11-21 Daika:Kk Anchoring nut used for slope stabilization method, and slope stabilization structure and slope stabilization method using the anchoring nut
JP2017141570A (en) * 2016-02-08 2017-08-17 国立大学法人 琉球大学 Structure of metallic ground anchor using pc steel strand coated with epoxy resin, production method and installation method
EP3396069A1 (en) * 2017-04-28 2018-10-31 Prometec S.r.l. Anchoring head for an anchoring rod

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