JP6471027B2 - Protective sheath - Google Patents

Protective sheath Download PDF

Info

Publication number
JP6471027B2
JP6471027B2 JP2015074118A JP2015074118A JP6471027B2 JP 6471027 B2 JP6471027 B2 JP 6471027B2 JP 2015074118 A JP2015074118 A JP 2015074118A JP 2015074118 A JP2015074118 A JP 2015074118A JP 6471027 B2 JP6471027 B2 JP 6471027B2
Authority
JP
Japan
Prior art keywords
protective sheath
contact portion
washer plate
anchor
bellows
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.)
Active
Application number
JP2015074118A
Other languages
Japanese (ja)
Other versions
JP2016194209A (en
Inventor
武穂 池田
武穂 池田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Metal Products Co Ltd
Original Assignee
Nippon Steel Metal Products Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Metal Products Co Ltd filed Critical Nippon Steel Metal Products Co Ltd
Priority to JP2015074118A priority Critical patent/JP6471027B2/en
Publication of JP2016194209A publication Critical patent/JP2016194209A/en
Application granted granted Critical
Publication of JP6471027B2 publication Critical patent/JP6471027B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Piles And Underground Anchors (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Description

この発明は、斜面安定化工法のように地盤にアンカー部材を挿入した状態で、降雨で地表面を流れる水などがアンカー部材を腐食することがないようにアンカー部材の地表付近の位置に被せられる保護シースに関するものである。   In the present invention, when the anchor member is inserted into the ground as in the slope stabilization method, the water near the ground surface of the anchor member is covered so that water flowing on the ground surface due to rain does not corrode the anchor member. It relates to a protective sheath.

例えば、斜面の崩壊を防止するために施工される斜面安定化工法では、模式的に示した図５のように、斜面地盤にアンカー部材５０を挿入し、アンカー部材５０の地上突出部に、アンカー部材５０の頭部を挿通させる支圧板５１を配置し、前記アンカー部材５０の頭部に螺合させたナットで締着してアンカー部材５０に緊張力を付与し、支圧板５１に地盤を押さえ込む支圧力を発生させる。
例えばこの斜面安定化工法の場合のように、地盤にアンカー部材を挿入する場合、アンカー部材の地表付近や地上突出部が錆びないように防錆が施される。アンカー部材の地表付近の防錆については、例えば特許文献１のように筒形の保護シースをアンカー部材の地表付近に被せることが行われている。 For example, in the slope stabilization method constructed to prevent the slope from collapsing, the anchor member 50 is inserted into the slope ground as shown in FIG. A bearing plate 51 through which the head portion of the member 50 is inserted is disposed, and tightened with a nut screwed into the head portion of the anchor member 50 to apply tension to the anchor member 50, thereby pressing the ground onto the bearing plate 51. Generate support pressure.
For example, when the anchor member is inserted into the ground as in the case of the slope stabilization method, rust prevention is performed so that the vicinity of the ground surface of the anchor member and the ground protruding portion do not rust. As for rust prevention in the vicinity of the ground surface of the anchor member, for example, as in Patent Document 1, a cylindrical protective sheath is placed near the ground surface of the anchor member.

特許文献1中の符号を用いて説明すると、地盤に挿入されるアンカー部材（アンカーロッド）３の地上突出部に、前記アンカー部材の頭部を挿通させナット６で締着して前記アンカー部材に緊張力を付与するための座金板部付きの支圧板５が設置される。そして、保護シース１０は、その上端面が支圧板当接部（支圧板５の座金板部への当接部）１０ｂの下面に当接するようにアンカー部材の地表付近に配置される。なお、支圧板当接部１０ｂは支圧板と一体の場合と別部材とする場合がある。   If it demonstrates using the code | symbol in patent document 1, the head part of the said anchor member will be penetrated to the ground protrusion part of the anchor member (anchor rod) 3 inserted in the ground, and it will fasten with the nut 6, and will be attached to the said anchor member. A bearing plate 5 with a washer plate for applying tension is installed. The protective sheath 10 is disposed in the vicinity of the ground surface of the anchor member so that the upper end surface of the protective sheath 10 abuts the lower surface of the pressure bearing plate abutting portion (the abutting portion of the pressure bearing plate 5 on the washer plate portion) 10b. In addition, the support plate contact portion 10b may be a separate member or a separate member.

特許文献１のように、アンカー施工に際してアンカー部材の外周面と削孔２の内壁と間の隙間に、アンカー部材と地盤との一体化と防錆を図るためのグラウト（充填材）４を注入する場合は、注入したグラウトが削孔内壁から地中に浸透したりグラウトの硬化時の収縮等で、削孔中へ充填したグラウトの上面が、削孔の口部よりも低下する。このため、少なくともグラウト上面が削孔の口部から低下した分だけはグラウトの二次注入を行わねばならない。
特許文献１の保護シースは、アンカー部材であるアンカーロッド３の頭部を支圧板５と結合する直前の段階で、最終的にグラウトの二次注入を必要十分に行うことが容易にしたものであり、一端側に半径方向へ拡がるフランジ状の支圧板当接部１０ｂと、前記支圧板当接部１０ｂから延びる蛇腹状の蛇腹部１０ｃと、筒状体の他側端部外周に半径方向外向きに突き出させた複数のスペーサ突起部１０ａとを備え、蛇腹部１０ｃとスペーサ突起部１０ａとの間に、外周形状が筒状曲面又は筒状曲面に凹部を備えた間隔保持部１０ｅを備えた構成である。
すなわち、蛇腹部１０ｃとスペーサ突起部１０ａとの間に設けた間隔保持部１０ｅがその外周面にグラウトを注入可能なスペースを確保している構成である。 As in Patent Document 1, grout (filling material) 4 is injected into the gap between the outer peripheral surface of the anchor member and the inner wall of the drilling hole 2 for the purpose of integrating the anchor member and the ground and preventing rust. When the grout is injected, it penetrates into the ground from the inner wall of the drilling hole or shrinks when the grout is hardened, so that the upper surface of the grout filled in the drilling hole is lower than the mouth part of the drilling hole. For this reason, the grout must be secondarily injected at least as much as the top surface of the grout is lowered from the mouth of the hole.
The protective sheath of Patent Document 1 facilitates the necessary and sufficient secondary injection of grout finally at the stage immediately before the head of the anchor rod 3 as an anchor member is coupled to the bearing plate 5. There is a flange-shaped bearing plate abutting portion 10b extending in the radial direction at one end side, a bellows-shaped bellows portion 10c extending from the bearing plate abutting portion 10b, and the outer periphery of the other end of the cylindrical body radially outward. A plurality of spacer protrusions 10a protruding in the direction, and a space holding part 10e having an outer peripheral shape of a cylindrical curved surface or a cylindrical curved surface with a recess between the bellows portion 10c and the spacer protrusion 10a. It is a configuration.
In other words, the interval holding portion 10e provided between the bellows portion 10c and the spacer projection portion 10a secures a space where grout can be injected on the outer peripheral surface thereof.

特開２０１３―１９４４１１JP 2013-194411 A

上記特許文献１の保護シースでは、支圧板当接部１０ｂが、一端側（外側）に半径方向へ拡がる態様のフランジ状をなすものなので、支圧板当接部１０ｂと内部に挿入されているアンカーロッド３との間に隙間があり、施工の際にこの隙間にグラウトが入り込んでしまうおそれがあった。
この隙間にグラウトが入り込んでしまうと、そのグラウトが固まった時に蛇腹部１０ｃの弾性による伸縮性能が阻害され、支圧板（支圧板の座金板部）と支圧板当接部（支圧板の座金板部への当接部）１０ｂとが当接しない状態となることも考えられる。
また、特許文献１では、グラウトの二次注入が容易なように、スペーサ突起部１０ａと蛇腹部１０ｃとの聞に外周形状が筒状曲面文は筒状曲面に凹部を備えた間隔保持部１０ｅを備えているが、間隔保持部１０ｅの断面剛性が低くて、保護シースをアンカーロッドに嵌め入れるために押し込んだ際に撓んでしまい、施工がしにくい（嵌め入れる作業がしにくい）という課題があった。 In the protective sheath of the above-mentioned patent document 1, since the bearing plate contact portion 10b has a flange shape that expands radially toward one end (outside), the bearing plate contact portion 10b and the anchor inserted in the inside There was a gap between the rod 3 and there was a risk that the grout would enter this gap during construction.
If the grout enters the gap, the expansion and contraction performance due to the elasticity of the bellows portion 10c is hindered when the grout is solidified, and the bearing plate (the washer plate portion of the bearing plate) and the bearing plate contact portion (the washer plate of the bearing plate). It is conceivable that the contact portion 10b does not come into contact with the contact portion 10b.
Further, in Patent Document 1, the outer peripheral shape of the spacer projection 10a and the bellows portion 10c is a cylindrical curved line sentence, and the interval holding part 10e is provided with a concave part on the cylindrical curved face so that the secondary injection of grout is easy. However, there is a problem in that the cross-sectional rigidity of the interval holding portion 10e is low and the protective sheath is bent when it is pushed into the anchor rod so that the construction is difficult (it is difficult to perform the fitting operation). there were.

本発明は、上記課題を解決するためになされたもので、斜面安定化工法などで地盤に挿入されるアンカー部材の地表面付近を防食する目的でアンカー部材に被せられる保護シースについて、その内部に挿入されるアンカー部材と保護シースとの間の隙間にグラウトなどの充填材が入り込むことなく、また、十分な剛性を備えて施工が容易な保護シースを提供することを目的とする。   The present invention has been made in order to solve the above-mentioned problems, and a protective sheath that covers an anchor member for the purpose of preventing corrosion near the ground surface of the anchor member that is inserted into the ground by a slope stabilization method or the like is provided therein. It is an object of the present invention to provide a protective sheath that does not allow a filler such as grout to enter the gap between the anchor member to be inserted and the protective sheath, and that has sufficient rigidity and is easy to construct.

上記課題を解決する請求項１の発明は、地盤に挿入されるアンカー部材の地上突出部に、ナットで締着するための座金板部付きの支圧板を配置する際に、前記アンカー部材の地表面付近を覆うことで降雨などからアン力一部材の地表付近を防錆する筒形の保護シースであって、
前記保護シースは、前記支圧板の前記座金板部に当接する上端側のフランジ状の座金板当接部と、前記座金板当接部の下面側に連続する本体部を備え、
前記本体部は、上部に位置する蛇腹状の蛇腹部と、前記蛇腹部の下端に連続する円筒体部とを備え、
前記座金板当接部は、前記本体部との接続位置から外側に鍔状に張り出す座金板密着部と、前記蛇腹部との接続位置から内側へ鍔状に張り出すアンカー密着部とを備え、
前記アンカー密着部は、前記アンカー部材に嵌め入れた際に弾性変形してアンカーに密着することを特徴とする。 The invention of claim 1 that solves the above-described problem is that when a bearing plate with a washer plate for fastening with a nut is disposed on the ground protruding portion of the anchor member inserted into the ground, the ground of the anchor member is arranged. It is a cylindrical protective sheath that rusts the surface of the surface of an unpowered member from the rain by covering the vicinity of the surface,
The protective sheath includes a flange-shaped washer plate abutting portion on the upper end side that abuts on the washer plate portion of the pressure bearing plate, and a main body portion continuous to the lower surface side of the washer plate abutting portion,
The main body portion includes a bellows-like bellows portion located at an upper portion, and a cylindrical body portion continuous to a lower end of the bellows portion,
The washer plate contact portion includes a washer plate contact portion projecting outward from a connection position with the main body portion, and an anchor contact portion projecting inward from the connection position with the bellows portion. ,
The anchor contact portion is elastically deformed when it is fitted into the anchor member and is in close contact with the anchor.

請求項２は、請求項１の保護シースにおいて、前記円筒体部は、外周面に周方向に間隔をあけて設けた複数の突出部を有する下端側のスペーサ突起部と、前記スペーサ突起部と前記蛇腹部との間を離間させる、前記スペーサ突起部の最大外径より小径の間隔保持部とからなることを特徴とする。   According to a second aspect of the present invention, in the protective sheath according to the first aspect, the cylindrical body portion includes a plurality of protrusions provided on the outer peripheral surface at intervals in the circumferential direction, a spacer protrusion portion on the lower end side, and the spacer protrusion portion. It is characterized by comprising an interval holding portion having a diameter smaller than the maximum outer diameter of the spacer projection portion, which is spaced apart from the bellows portion.

請求項３は、 請求項１又は２の保護シースにおいて、前記座金板当接部の下面側は前記アンカー密着部が前記座金板密着部より段差を有して薄く、上面側は前記座金板密着部と前記アンカー密着部とが段差なく平面を形成していることを特徴とする。
請求項４は、 請求項１又は２の保護シースにおいて、前記座金板当接部の上面側は前記アンカー密着部が前記座金板密着部より段差を有して薄く形成していることを特徴とする。 According to a third aspect of the present invention, in the protective sheath of the first or second aspect, the lower surface side of the washer plate contact portion is thinner with the anchor contact portion having a step than the washer plate contact portion, and the upper surface side is the washer plate contact portion. The portion and the anchor contact portion form a flat surface without a step.
According to a fourth aspect of the present invention, in the protective sheath according to the first or second aspect, the upper surface side of the washer plate contact portion is formed so that the anchor contact portion is thinner than the washer plate contact portion. To do.

請求項５は、請求項１〜４のいずれか１項の保護シースにおいて、前記蛇腹部は、その大径部にて前記座金板当接部に連続していることを特徴とする。
請求項６は、請求項２の保護シースにおいて、前記間隔保持部の外周面に、前記スペーサ突起部から前記蛇腹部まで直線状に延びる複数のリブが周方向に間隔をあけて設けられていることを特徴とする。
According to a fifth aspect of the present invention, in the protective sheath according to any one of the first to fourth aspects, the bellows portion is continuous with the washer plate contact portion at a large diameter portion thereof.
According to a sixth aspect of the present invention, in the protective sheath of the second aspect, a plurality of ribs extending linearly from the spacer projection to the bellows are provided on the outer peripheral surface of the spacing holding portion at intervals in the circumferential direction. It is characterized by that.

本発明の保護シースによれば、その座金板当接部が、蛇腹部との接続位置から内側へ鍔状に張り出すアンカー密着部を備えており、保護シースをアンカー部材に嵌め入れた際にアンカー密着部が弾性変形してアンカーに密着するので、アンカー部材との間に隙間がなくなり、グラウト注入の際にグラウトが蛇腹部の内部に入り込んでしまうことを防止できる。グラウトが蛇腹部の内部に入り込み固化すると、蛇腹部の伸縮性能がなくなりその機能が妨げられるが、グラウトが蛇腹部の内部に入り込むことが防止されるので、そのような問題は生じない。   According to the protective sheath of the present invention, the washer plate contact portion includes the anchor contact portion that projects inward from the connection position with the bellows portion, and when the protective sheath is fitted into the anchor member, Since the anchor contact portion is elastically deformed and is in close contact with the anchor, there is no gap between the anchor member and the grout can be prevented from entering the bellows portion when the grout is injected. If the grout enters the inside of the bellows portion and solidifies, the expansion / contraction performance of the bellows portion is lost and its function is hindered. However, since the grout is prevented from entering the inside of the bellows portion, such a problem does not occur.

請求項２によれば、座金板当接部の下面側は前記アンカー密着部が座金板密着部より段差を有して薄くなっているので容易に撓むことができ、アンカー部材の外周面に確実に隙間なく密着させることができ、グラウト注入の際にグラウトが蛇腹部の内部に入り込んでしまうことを確実に防止できる。
また、アンカー密着部が容易に撓むことで、保護シースをアンカー部材に押し込んで嵌め入れる際に、その嵌め入れる作業が容易になる。
このように、保護シースのアンカー部材への嵌め入れ易さを確保しつつ、グラウト注入の際のグラウトの蛇腹部内への侵入防止を確保できる。
また、アンカー密着部を薄くしていても、下面側にて薄くしており上面側は前記座金板密着部と前記アンカー密着部とが段差のない平面となっているので、支圧板の座金板部下面と接触する座金板当接部の密着面積が広くなって封止性能が向上し、一層強固にアンカー部材の防錆が図られる。 According to the second aspect, the lower surface side of the washer plate contact portion can be easily bent because the anchor contact portion is thinner than the washer plate contact portion so that it can be easily bent. It is possible to securely adhere without gaps and reliably prevent the grout from entering the bellows portion during the grout injection.
Moreover, when the anchor contact portion is easily bent, when the protective sheath is pushed into the anchor member and fitted, the work of fitting is facilitated.
In this way, it is possible to ensure that the grout is prevented from entering the bellows portion during grout injection while ensuring the ease of fitting the protective sheath into the anchor member.
Even if the anchor contact portion is thinned, it is thin on the lower surface side, and the upper surface side is a flat surface between the washer plate contact portion and the anchor contact portion, so that the washer plate of the bearing plate The contact area of the washer plate contact portion that comes into contact with the lower surface of the portion is widened, the sealing performance is improved, and the anchor member is rusted more firmly.

請求項３によれば、蛇腹部が大径部にて座金板当接部に連続しているので、座金板当接部を広くしても、座金板当接部における座金板密着部の外側への張り出し長さ（半径方向長さ）を短くすることができる。これにより、外側に張り出した座金板密着部の撓み変形を抑制できる（片持ち梁の長さを短くすると撓み変形が小さくなることと同様）。   According to claim 3, since the bellows portion is continuous with the washer plate contact portion at the large diameter portion, the outer side of the washer plate contact portion in the washer plate contact portion even if the washer plate contact portion is widened. The overhang length (radial length) can be shortened. Thereby, the bending deformation of the washer plate contact portion projecting to the outside can be suppressed (similar to the fact that the bending deformation becomes smaller when the length of the cantilever is shortened).

請求項４によれば、間隔保持部の外周面に、スペーサ突起部から蛇腹部まで直線状に延びる複数のリブが周方向に間隔をあけて設けられているので、間隔保持部の剛性を高くすることができる。したがって、保護シースをアンカー部材に嵌め入れる際に、間隔保持部が撓んで嵌め入れにくいということがなく、保護シースをアンカー部材に嵌め入れる作業が容易になる。
また、間隔保持部の剛性を高くするために単に半径方向外側に厚みを増したのでは、間隔保持部の外周面と削孔内壁との隙間が狭くなって、この間隔保持部の外周部分からのグラウト二次注入が困難になるが、周方向に間隔をあけたリブなので、リブ間の空間の存在で、グラウトの二次注入が困難になることはない。
このように間隔保持部の剛性向上と二次注入容易性の両方を確保することができる。 According to the fourth aspect, since the plurality of ribs extending linearly from the spacer projection to the bellows portion are provided on the outer peripheral surface of the interval holding portion at intervals in the circumferential direction, the rigidity of the interval holding portion is increased. can do. Therefore, when the protective sheath is fitted into the anchor member, the interval holding portion is not bent and difficult to fit, and the work of fitting the protective sheath into the anchor member is facilitated.
Further, if the thickness is simply increased outward in the radial direction in order to increase the rigidity of the interval holding portion, the gap between the outer peripheral surface of the interval holding portion and the inner wall of the drilling hole becomes narrower, and the outer peripheral portion of the interval holding portion becomes smaller. However, since the ribs are spaced apart in the circumferential direction, the presence of the space between the ribs does not make the secondary injection of grout difficult.
Thus, both the rigidity improvement of a space | interval holding | maintenance part and secondary injection | pouring ease are securable.

本発明の一実施例の保護シースを装着して斜面安定化工法を施工した斜面のアンカー部材の部分の断面図である。It is sectional drawing of the part of the anchor member of the slope which attached the protective sheath of one Example of this invention, and constructed the slope stabilization construction method. 図１の要部拡大図である。It is a principal part enlarged view of FIG. 図１、２における保護シースの詳細構造を示すもので、（イ）は正面図、（ロ）は（イ）のＡ−Ａ断面図、（ハ）は（イ）の下面図、（ニ）は（ロ）のＢ-Ｂ断面図、（ホ）は（ニ）の要部拡大図である。1 and 2 show the detailed structure of the protective sheath, wherein (a) is a front view, (b) is a cross-sectional view taken along line AA of (a), (c) is a bottom view of (a), and (d). (B) is a cross-sectional view taken along the line BB in FIG. 図１、２における支圧板の詳細を示すもので、（イ）は平面図、（ロ）は（イ）のＣ−Ｃ断面図である。The details of the pressure bearing plate in FIGS. 1 and 2 are shown, in which (A) is a plan view and (B) is a cross-sectional view taken along the line CC of (A). 本発明の保護シースを使用可能な斜面安定化工法について説明する模式図である。It is a schematic diagram explaining the slope stabilization construction method which can use the protective sheath of this invention.

以下、本発明の保護シースを実施するための形態について、図面を参照して説明する。   Hereinafter, the form for implementing the protective sheath of this invention is demonstrated with reference to drawings.

本発明の保護シースは、地盤に挿入されるアンカー部材の地表面付近を覆うことで降雨などからアン力一部材の地表付近を防錆する筒形の保護シースであり、図５で簡単に説明したような斜面安定化工法を施工する際に使用可能である。
図１は本発明の一実施例の保護シース１を装着して斜面安定化工法を施工した斜面のアンカー部材２の部分の断面図、図２は図１の要部各断面図である。
斜面安定化工法を施工する場合、斜面地盤にアンカー部材２を地盤に挿入し、アンカー部材２の地上突出部にアンカー部材２の頭部を挿通させる支圧板３を配置し、支圧板３から突出したアンカー部材２のねじ部にナット４を螺合させ締着してアンカー部材２に緊張力を付与し、これにより支圧板３に地盤を押さえ込む支圧力を発生させる。
実施例のアンカー部材２は自穿孔ロックボルトであり、先端に掘削ビット５を装着している。したがって、アンカー部材２を挿入すると同時に削孔１５が形成される。アンカー部材２の外周面と削孔１５の内壁と間に充填されるセメントミルク等のグラウトを２０で示す。 The protective sheath of the present invention is a cylindrical protective sheath that covers the vicinity of the ground surface of an anchor member to be inserted into the ground so as to prevent rust near the ground surface of the unforced member from rain or the like. It can be used when constructing the slope stabilization method.
FIG. 1 is a cross-sectional view of a portion of an anchor member 2 on a slope where a protective sheath 1 according to an embodiment of the present invention is attached and the slope stabilization method is applied, and FIG. 2 is a cross-sectional view of the main part of FIG.
When constructing the slope stabilization method, the anchor member 2 is inserted into the ground on the slope ground, the bearing plate 3 through which the head of the anchor member 2 is inserted into the ground protruding portion of the anchor member 2, and protrudes from the bearing plate 3 The nut 4 is screwed and fastened to the threaded portion of the anchor member 2 to apply tension to the anchor member 2, thereby generating a support pressure that presses the ground against the support plate 3.
The anchor member 2 of the embodiment is a self-drilling lock bolt, and a drill bit 5 is attached to the tip. Therefore, the hole 15 is formed simultaneously with the insertion of the anchor member 2. A grout such as cement milk filled between the outer peripheral surface of the anchor member 2 and the inner wall of the hole 15 is indicated by 20.

前記支圧板３は、鋼製であり、図４（イ）、（ロ）に示すように、アンカー部材２の頭部を挿通させる中心孔６ａを備える。図示例では略三角形状の底板６の上面に、前記中心孔６ａに合わせて円筒体７を溶接固定し、円筒体７の上端に、アンカー部材２の頭部を挿通させるアンカー挿通孔８ａを備える。座金板部８を溶接固定し、前記円筒体７の外周面と前記底板６の上面との間に補強リブ９を溶接固定した構成である。補強リブ９にはワイヤロープを挿通させるための切欠き９ａを設けている。   The bearing plate 3 is made of steel and includes a center hole 6a through which the head of the anchor member 2 is inserted as shown in FIGS. In the illustrated example, the cylindrical body 7 is welded and fixed to the upper surface of the substantially triangular bottom plate 6 in accordance with the center hole 6a, and an anchor insertion hole 8a through which the head of the anchor member 2 is inserted is provided at the upper end of the cylindrical body 7. . The washer plate portion 8 is fixed by welding, and the reinforcing rib 9 is fixed by welding between the outer peripheral surface of the cylindrical body 7 and the upper surface of the bottom plate 6. The reinforcing rib 9 is provided with a notch 9a for inserting a wire rope.

斜面安定化工法を施工する場合、前記の通りアンカー部材２を地盤に挿入した後、アンカー部材２の地上突出部に支圧板３を図示のように被せるが、その被せる前に保護シース１をアンカー部材２の地表付近に被せる。   When constructing the slope stabilization method, the anchor member 2 is inserted into the ground as described above, and then the bearing plate 3 is put on the ground protruding portion of the anchor member 2 as shown in the figure, but before the covering, the protective sheath 1 is anchored. Cover the surface of the member 2 near the surface.

保護シース１の詳細構造を図３に示す。この保護シース１は、全体として筒形で、前記支圧板３の前記座金板部８に当接する上端側のフランジ状の座金板当接部１０と、前記座金板当接部の下面側に連続する本体部とを備えている。前記本体部は、上部に位置する蛇腹状の蛇腹部１１と、前記蛇腹部１１の下端に連続する円筒体部１２とを備えている。
前記蛇腹部１１は、大径部１１ａと小径部１１ｂとが交互に連続して筒壁断面が波状をなす筒状体であるが、図示の通りその大径部１１ａにて前記座金板当接部１０に連続している。なお、前記座金板当接部１０と蛇腹部１１との間に蛇腹部１１の大径部１０ａと略同径の短筒状部分があってもよい。
前記円筒体部１２は、外周面に周方向に間隔をあけて設けた複数の突出部を有する下端側のスペーサ突起部１３と、前記スペーサ突起部１３と前記蛇腹部１１との間を離間させる、前記スペーサ突起部の最大外径より小径の間隔保持部１４とからなっている。 The detailed structure of the protective sheath 1 is shown in FIG. The protective sheath 1 is generally cylindrical and is continuous with a flange-like washer plate contact portion 10 on the upper end side that contacts the washer plate portion 8 of the bearing plate 3 and a lower surface side of the washer plate contact portion. And a main body. The main body portion includes a bellows-like bellows portion 11 located at an upper portion, and a cylindrical body portion 12 continuing to the lower end of the bellows portion 11.
The bellows portion 11 is a cylindrical body in which the large-diameter portions 11a and the small-diameter portions 11b are alternately continuous and the cross-section of the cylindrical wall is wavy, but as shown in the drawing, the large-diameter portion 11a contacts the washer plate. It is continuous with the part 10. There may be a short cylindrical portion having the same diameter as the large diameter portion 10 a of the bellows portion 11 between the washer plate contact portion 10 and the bellows portion 11.
The cylindrical body 12 separates the spacer protrusion 13 on the lower end side having a plurality of protrusions provided on the outer peripheral surface at intervals in the circumferential direction, and the spacer protrusion 13 and the bellows 11. The spacer holding portion 14 has a smaller diameter than the maximum outer diameter of the spacer protrusion.

前記座金板当接部１０は、前記蛇腹部１１との接続位置から外側に鍔状に張り出す座金板密着部１０ａと、前記蛇腹部１１との接続位置から内側へ鍔状に張り出すアンカー密着部１０ｂとを備えている。
そして、前記座金板当接部１０の下面側は前記アンカー密着部１０ｂが前記座金板密着部１０ａより段差を有して薄く、上面側は前記座金板密着部１０ａと前記アンカー密着部１０ｂとが段差なく平面を形成している。
なお、前記アンカー密着部１０ｂが前記座金板密着部１０ａより段差を有して薄くするにあたり、この段差を前記座金板当接部１０の上面側に設けるようにしてもよい。
実施例の保護シース１は全体がゴム状材質からなっており、前記の薄いアンカー密着部１０ｂは、アンカー部材２に嵌め入れた際に弾性変形してアンカー部材２の外周面に密着可能であるが、他の部分と同じ材質ではアンカー部材２の外周面に十分に密着しない場合には、アンカー密着部１０ｂのみを容易に弾性変形する材質のものとするとよい。 The washer plate contact portion 10 has a washer plate contact portion 10a projecting outward from the connection position with the bellows portion 11 and an anchor contact projecting inward from the connection position with the bellows portion 11 to the inside. Part 10b.
The lower surface side of the washer plate contact portion 10 is thinner with the anchor contact portion 10b having a step than the washer plate contact portion 10a, and the upper surface side includes the washer plate contact portion 10a and the anchor contact portion 10b. A flat surface is formed without steps.
When the anchor contact portion 10b is thinner than the washer plate contact portion 10a, the step may be provided on the upper surface side of the washer plate contact portion 10.
The protective sheath 1 of the embodiment is entirely made of a rubber-like material, and the thin anchor contact portion 10b is elastically deformed when fitted into the anchor member 2 and can be in close contact with the outer peripheral surface of the anchor member 2. However, in the case where the same material as the other parts does not sufficiently adhere to the outer peripheral surface of the anchor member 2, only the anchor contact portion 10b may be made of a material that easily elastically deforms.

前記円筒体部１２の下端側部分をなすスペーサ突起部１３は、周方向に等間隔の４カ所に設けたリブ状の突起１３ａを有し、このリブ状の突起１３ａにより保護シース１の外周部にグラウト充填スペースを確保する。
なお、保護シース１の外周部にグラウト充填スペースを確保することができれば作用を奏するものであれば、種々の突起形状を採用できる。
また、リブ状の突起１３ａは、必ずしも４カ所でなくともよく、３カ所であっても５カ所以上であってもよい。 The spacer projection 13 forming the lower end side portion of the cylindrical body portion 12 has rib-like projections 13a provided at four equally spaced intervals in the circumferential direction, and the rib-like projections 13a allow the outer circumference of the protective sheath 1 to be formed. Ensure space for grout filling.
It should be noted that various protrusion shapes can be employed as long as the grout filling space can be secured on the outer peripheral portion of the protective sheath 1 as long as it has an effect.
Further, the rib-shaped protrusions 13a are not necessarily four, and may be three or five or more.

前記間隔保持部１４の存在により、前記スペーサ突起部１３と前記蛇腹部１１との間を離間させることができ、これにより、図１、図２に示す通り、蛇腹部１１の下端を地表面より適宜の距離Ｈだけ上に位置させることができる。なお、蛇腹部１１がグラウトに浸かってしまうと、伸縮作用を失うので、グラウトに浸からないように、上記の通り蛇腹部１１を地表面より上に位置させる。
この間隔保持部１４の外周面には、前記スペーサ突起部１３から前記蛇腹部１１まで直線状に延びる図示例では４本のリブ１４ａが周方向に間隔をあけて設けられている。前記リブ１４ａは、前記スペーサ突起部１３の周方向の４カ所のリブ状突起１３ａの位置と合わせて形成している。なお、この間隔保持部１４のリブ１４ａの高さは、スペーサ突起部１３のリブ状突起１３ａの高さより低い。
そして、この間隔保持部１４は、その外径（リブ１４ａの高さ位置の外径）が、スペーサ突起部１３の最大外径（リブ状の突起１３ａの高さ位置の外径）より小さいので、削孔内壁との間に隙間が形成され、したがって、この間隔保持部１４の地表面付近の部分に位置する削孔口（削孔１５の地表面位置の開口）からグラウトの二次注入が可能である。 Due to the presence of the gap holding portion 14, the spacer projection 13 and the bellows portion 11 can be separated from each other, and as shown in FIGS. 1 and 2, the lower end of the bellows portion 11 is separated from the ground surface. It can be positioned above by an appropriate distance H. If the bellows portion 11 is immersed in the grout, the expansion and contraction action is lost. Therefore, the bellows portion 11 is positioned above the ground surface as described above so as not to be immersed in the grout.
In the illustrated example, four ribs 14 a extending linearly from the spacer protrusion 13 to the bellows portion 11 are provided on the outer peripheral surface of the interval holding portion 14 in the circumferential direction. The ribs 14 a are formed so as to match the positions of the four rib-like protrusions 13 a in the circumferential direction of the spacer protrusion 13. Note that the height of the ribs 14 a of the interval holding part 14 is lower than the height of the rib-like protrusions 13 a of the spacer protrusions 13.
The distance holding portion 14 has an outer diameter (an outer diameter at the height position of the rib 14a) smaller than a maximum outer diameter of the spacer protrusion portion 13 (an outer diameter at the height position of the rib-shaped protrusion 13a). Therefore, a gap is formed between the inner wall of the drilling hole, and therefore, the secondary injection of grout is performed from the drilling hole (opening at the ground surface position of the drilling hole 15) located in the vicinity of the ground surface of the gap holding portion 14. Is possible.

上記の保護シース１を用いて斜面安定化工法を施工する手順について説明する。
斜面地盤に多数のアンカー部材２を分布状に設置する。実施例のアンカー部材２は掘削ビット５を持つ自穿孔ロックボルトであり、アンカー部材２を挿入すると同時に削孔１５が形成される。
次いで、保護シース１をアンカー部材２の上部に被せる。次いで、中空のロックボルトである各アンカー部材２の上端にグラウト注入ホースを繋ぎ、グラウトを注入する（一次注入）。注入されてアンカー部材２の先端から吐出されたグラウトは、アンカー部材２の外周と削孔内壁１５と間の隙間に入り込み、削孔下端側から順次その隙間に充填されていくが、注入グラウトが削孔口まで達するのを確認するまで注入を行う。
なお、自穿孔式のアンカー部材を用いないで、公知の穿孔装置で穿孔する場合は、アンカー部材２にグラウト注入ホースを添わせて結合し、そのグラウト注入ホース付きのアンカー部材２を削孔１５に挿入して、グラウト注入を行うとよい。この場合は、グラウト注入ホースを埋め殺しにする。 A procedure for constructing the slope stabilization method using the protective sheath 1 will be described.
A large number of anchor members 2 are installed in a distributed manner on the slope ground. The anchor member 2 of the embodiment is a self-drilling lock bolt having an excavation bit 5, and the drilling hole 15 is formed at the same time as the anchor member 2 is inserted.
Next, the protective sheath 1 is placed over the anchor member 2. Next, a grout injection hose is connected to the upper end of each anchor member 2 which is a hollow lock bolt, and the grout is injected (primary injection). The grout injected and discharged from the tip of the anchor member 2 enters the gap between the outer periphery of the anchor member 2 and the inner wall 15 of the drill hole, and fills the gap sequentially from the lower end side of the drill hole. Inject until it reaches the drilling hole.
When drilling with a known drilling device without using a self-piercing anchor member, the anchor member 2 is joined with a grout injection hose, and the anchor member 2 with the grout injection hose is drilled 15. And then grout injection. In this case, the grout injection hose is buried.

上記のように削孔の後に、保護シース１をアンカー部材２の地上突出部に被せ、その下部のスペーサ突起部１３が削孔上部のグラウト中に潜り込む深さ、かつ、蛇腹部１１の下端位置は地表面より上の位置にくる深さまで押し込む。また、この押し込み深さは、蛇腹部１１に圧縮代が残るように、蛇腹部１１の上端面の高さ位置が、支圧板３の座金板部８の想定される施工高さ位置より若干高い位置にくるような深さとする。
その後、グラウトを注入する（一次注入）。 As described above, after the drilling, the protective sheath 1 is put on the ground protruding portion of the anchor member 2, and the depth at which the lower spacer projection 13 enters the grout above the drilling hole and the lower end position of the bellows portion 11 Push down to a depth above the ground surface. Further, the pushing depth is slightly higher at the height position of the upper end surface of the bellows portion 11 than the assumed construction height position of the washer plate portion 8 of the bearing plate 3 so that the compression margin remains in the bellows portion 11. The depth should be at the position.
Thereafter, grout is injected (primary injection).

グラウト（一次注入）が硬化した時点では、注入したグラウトが削孔内壁から地中に浸透したりグラウトの硬化時の収縮等で、グラウトの上面が削孔口の位置より低下するので、削孔口よりグラウトの二次注入を行う。このグラウト二次注入は、前述の通り、間隔保持部１４の地表面付近の部分に位置する削孔口（削孔１５の地表面位置の開口）から行うことができる。
なお、このグラウト二次注入は、前記の通り保護シース１の中間にある間隔保持部１４の部分から行うので、十分慎重に作業をすれば、保護シース１の上端の座金板当接部１０の開口からグラウトが入り込むことはないのであるが、現場作業では間隔保持部１４の直ぐ近くにある保護シース１の上端付近にたまたまグラウトがかかる場合もあるので、そのような場合にもグラウトの侵入を防止できる。 When the grout (primary injection) is hardened, the injected grout penetrates into the ground from the inner wall of the drilling hole or shrinks when the grout hardens, so the upper surface of the grout is lowered from the position of the drilling hole. A secondary injection of grout is performed from the mouth. As described above, this grout secondary injection can be performed from a drilling hole (an opening at the ground surface position of the drilling hole 15) located in the vicinity of the ground surface of the interval holding unit 14.
In addition, since this grouting secondary injection is performed from the part of the space | interval holding | maintenance part 14 in the middle of the protective sheath 1 as above-mentioned, if work is done carefully enough, the washer plate contact part 10 of the upper end of the protective sheath 1 will be carried out. Although the grout does not enter from the opening, it may happen that the grout happens to be near the upper end of the protective sheath 1 immediately adjacent to the interval holding portion 14 in the field work. Can be prevented.

二次注入のグラウトの硬化を確認した後、支圧板３をアンカー部材２に被せる。すなわち、支圧板３の座金板部８のアンカー挿通孔８ａにアンカー部材２の頭部を通して、支圧板３を地表面に載せる。
次いで、支圧板３の座金板部８のアンカー挿通孔８ａから突出したアンカー部材２のねじ部にワッシャ（球面ワッシャ１６）を介在させてナット４（球面ナット）を螺合させ締着してアンカー部材２に緊張力を付与え、これにより支圧板３に地盤を押さえ込む支圧力を発生させる。
ナット４を締着して支圧板３を地表面に押し付けた時、支圧板３の座金板部８が支圧板３と一体に下降して保護シース１の座金板当接部１０に当接するが、さらに押し下げて蛇腹部１１が若干圧縮した状態とする。これにより、地盤の変動などにより支圧板３の高さ位置が変動する場合でも、保護シース１の蛇腹部１１が支圧板３に追随して伸縮し、座金板当接部１０が支圧板３の座金板部８との密着状態を維持し、保護シース１内に水が浸入することを防止し、アンカー部材２の腐食防止の機能を保つ。
その後、グリスを充填したキャップ１７を被せて、アンカー部材２の上端部の腐食を防止する。 After confirming the hardening of the grout of the secondary injection, the bearing plate 3 is put on the anchor member 2. That is, the bearing plate 3 is placed on the ground surface through the head of the anchor member 2 through the anchor insertion hole 8a of the washer plate portion 8 of the bearing plate 3.
Next, the nut 4 (spherical nut) is screwed and fastened to the threaded portion of the anchor member 2 protruding from the anchor insertion hole 8a of the washer plate portion 8 of the bearing plate 3 with the washer (spherical washer 16) interposed therebetween. A tension force is applied to the member 2, thereby generating a supporting pressure for pressing the ground against the supporting plate 3.
When the nut 4 is fastened and the pressure plate 3 is pressed against the ground surface, the washer plate portion 8 of the pressure plate 3 is lowered integrally with the pressure plate 3 and comes into contact with the washer plate contact portion 10 of the protective sheath 1. Further, the bellows portion 11 is slightly compressed to a slightly compressed state. Thereby, even when the height position of the bearing plate 3 fluctuates due to changes in the ground, etc., the bellows portion 11 of the protective sheath 1 expands and contracts following the bearing plate 3, and the washer plate abutting portion 10 extends from the bearing plate 3. The contact state with the washer plate portion 8 is maintained, water is prevented from entering the protective sheath 1, and the corrosion prevention function of the anchor member 2 is maintained.
Thereafter, the cap 17 filled with grease is put on to prevent corrosion of the upper end portion of the anchor member 2.

上述の実施例では斜面安定化工法を施工する場合について述べたが、必ずしも斜面安定化工法を施工する場合に限らず、地盤に挿入したアンカー部材の頭部に支圧板を取り付ける施工を行う場合に適用できる。   In the above-described embodiment, the case where the slope stabilization method is applied has been described. However, the present invention is not necessarily limited to the case where the slope stabilization method is applied, but when the support plate is attached to the head of the anchor member inserted in the ground. Applicable.

１ 保護シース
２ アンカー部材
３ 支圧板
４ ナット
５ 掘削ビット
６ 底板
６ａ 中心孔
７ 円筒体
８ （支圧板の）座金板部
８ａ アンカー挿通孔
９ 補強リブ
１０ （保護シースの）座金板当接部
１０ａ 座金板密着部
１０ｂ アンカー密着部
１１ 蛇腹部
１２ 円筒体部
１３ スペーサ突起部
１４ 間隔保持部
１５ 削孔
DESCRIPTION OF SYMBOLS 1 Protective sheath 2 Anchor member 3 Supporting pressure plate 4 Nut 5 Drilling bit 6 Bottom plate 6a Center hole 7 Cylindrical body 8 Washing plate part 8a of anchoring plate 9 Reinforcement rib 10 Washing plate contact part 10a of protection sheath Washer plate contact portion 10b Anchor contact portion 11 bellows portion 12 cylindrical body portion 13 spacer projection portion 14 spacing holding portion 15 drilling hole

Claims (6)

地盤に挿入されるアンカー部材の地上突出部に、ナットで締着するための座金板部付きの支圧板を配置する際に、前記アンカー部材の地表面付近を覆うことで降雨などからアン力一部材の地表付近を防錆する筒形の保護シースであって、
前記保護シースは、前記支圧板の前記座金板部に当接する上端側のフランジ状の座金板当接部と、前記座金板当接部の下面側に連続する本体部を備え、
前記本体部は、上部に位置する蛇腹状の蛇腹部と、前記蛇腹部の下端に連続する円筒体部とを備え、
前記座金板当接部は、前記本体部との接続位置から外側に鍔状に張り出す座金板密着部と、前記蛇腹部との接続位置から内側へ鍔状に張り出すアンカー密着部とを備え、
前記アンカー密着部は、前記アンカー部材に嵌め入れた際に弾性変形してアンカーに密着することを特徴とする保護シース。 When placing a bearing plate with a washer plate for fastening with a nut on the ground protruding part of the anchor member inserted into the ground, it covers the vicinity of the ground surface of the anchor member to prevent unloading. A cylindrical protective sheath that rusts around the surface of the member,
The protective sheath includes a flange-shaped washer plate abutting portion on the upper end side that abuts on the washer plate portion of the pressure bearing plate, and a main body portion continuous to the lower surface side of the washer plate abutting portion,
The main body portion includes a bellows-like bellows portion located at an upper portion, and a cylindrical body portion continuous to a lower end of the bellows portion,
The washer plate contact portion includes a washer plate contact portion projecting outward from a connection position with the main body portion, and an anchor contact portion projecting inward from the connection position with the bellows portion. ,
The protective sheath is characterized in that the anchor contact portion is elastically deformed and is in close contact with the anchor when fitted into the anchor member. 前記円筒体部は、外周面に周方向に間隔をあけて設けた複数の突出部を有する下端側のスペーサ突起部と、前記スペーサ突起部と前記蛇腹部との間を離間させる、前記スペーサ突起部の最大外径より小径の間隔保持部とからなることを特徴とする請求項１記載の保護シース。   The cylindrical body portion has a plurality of projecting portions provided on the outer peripheral surface at intervals in the circumferential direction, and a spacer projecting portion on a lower end side, and the spacer projecting portion is spaced apart from the spacer projecting portion and the bellows portion. The protective sheath according to claim 1, further comprising an interval holding portion having a smaller diameter than a maximum outer diameter of the portion. 前記座金板当接部の下面側は前記アンカー密着部が前記座金板密着部より段差を有して薄く、上面側は前記座金板密着部と前記アンカー密着部とが段差なく平面を形成していることを特徴とする請求項１又は２に記載の保護シース。   On the lower surface side of the washer plate contact portion, the anchor contact portion is thin with a step from the washer plate contact portion, and on the upper surface side, the washer plate contact portion and the anchor contact portion form a flat surface without a step. The protective sheath according to claim 1, wherein the protective sheath is a protective sheath. 前記座金板当接部の上面側は前記アンカー密着部が前記座金板密着部より段差を有して薄く形成していることを特徴とする請求項１又は２に記載の保護シース。   3. The protective sheath according to claim 1, wherein the anchor contact portion is formed thinner on the upper surface side of the washer plate contact portion than the washer plate contact portion. 前記蛇腹部は、その大径部にて前記座金板当接部に連続していることを特徴とする請求項１〜４のいずれか１項に記載の保護シース。   The protective bellows according to any one of claims 1 to 4, wherein the bellows portion is continuous with the washer plate contact portion at a large diameter portion thereof. 前記間隔保持部の外周面に、前記スペーサ突起部から前記蛇腹部まで直線状に延びる複数のリブが周方向に間隔をあけて設けられていることを特徴とする請求項２に記載の保護シース。 3. The protective sheath according to claim 2, wherein a plurality of ribs extending linearly from the spacer projection to the bellows are provided on the outer circumferential surface of the spacing holding portion at intervals in the circumferential direction. .
JP2015074118A 2015-03-31 2015-03-31 Protective sheath Active JP6471027B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015074118A JP6471027B2 (en) 2015-03-31 2015-03-31 Protective sheath

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015074118A JP6471027B2 (en) 2015-03-31 2015-03-31 Protective sheath

Publications (2)

Publication Number Publication Date
JP2016194209A JP2016194209A (en) 2016-11-17
JP6471027B2 true JP6471027B2 (en) 2019-02-13

Family

ID=57322706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015074118A Active JP6471027B2 (en) 2015-03-31 2015-03-31 Protective sheath

Country Status (1)

Country Link
JP (1) JP6471027B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6530439B2 (en) * 2017-04-07 2019-06-12 日本軌道工業株式会社 Orbital structure
JP6905425B2 (en) * 2017-09-07 2021-07-21 岡部株式会社 Lock bolt head water stop device
CN108589569B (en) * 2018-05-09 2020-12-01 磐安县阳丹科技有限公司 Suspension fixing piece of slope protection net for highway engineering
JP7257082B2 (en) * 2021-04-22 2023-04-13 アビエンジニアリング株式会社 Anchor installation method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0626040A (en) * 1992-07-09 1994-02-01 Plus Teku Kk Trumpet sheath for ground anchor and construction method using the same
JP2731727B2 (en) * 1994-08-31 1998-03-25 黒沢建設株式会社 Head anchoring structure in ground anchor
DE4432128C2 (en) * 1994-09-09 2001-09-06 Dyckerhoff & Widmann Ag Method for producing an anchor element for an earth or rock anchor, rock bolts or the like from a strand of twisted steel wires
JP2667378B2 (en) * 1995-03-27 1997-10-27 黒沢建設株式会社 Ground anchor head anchoring structure
JP3703899B2 (en) * 1996-01-23 2005-10-05 岡部株式会社 Anchor rust prevention device
JP3720908B2 (en) * 1996-04-11 2005-11-30 岡部株式会社 Anchor head antirust method and apparatus
JP3317277B2 (en) * 1999-06-29 2002-08-26 住友電気工業株式会社 Corrosion prevention structure of anchoring part of PC steel
JP3590000B2 (en) * 2000-07-14 2004-11-17 黒沢建設株式会社 Ground anchor head anchoring structure
JP4387380B2 (en) * 2006-06-15 2009-12-16 弘和産業株式会社 Anchor repair method, anchor head and head back mechanism
JP5981742B2 (en) * 2012-03-19 2016-08-31 岡部株式会社 Protective sheath for slope stabilization method and construction method of slope stabilization method

Also Published As

Publication number Publication date
JP2016194209A (en) 2016-11-17

Similar Documents

Publication Publication Date Title
JP6471027B2 (en) Protective sheath
KR100720946B1 (en) Composit pile combined steel tubular pile and concrete pile reinforced with connecting structure
JP6462512B2 (en) Anchor head fixing member for anchor rust prevention and anchor head fixing structure thereof
JP5002517B2 (en) Fixing hardware, slope stabilization structure and slope stabilization method using the same
JP5981742B2 (en) Protective sheath for slope stabilization method and construction method of slope stabilization method
JP5132009B1 (en) Nut for fixing used in slope stabilization method, slope stabilization structure using the same, and slope stabilization method
JP2010095846A (en) Pile head joint structure for precast concrete pile
JP5021325B2 (en) Manufacturing method of basic steel pipe material for supporting train lines
JP6244123B2 (en) Waterproof member for ground anchor
JP5420392B2 (en) Pile head structure of steel pipe concrete pile
JP2008215034A (en) Manhole installation stabilizing structure
JP3788464B2 (en) Manhole connection
JP2005248496A (en) Method for uplift preventive manhole in liquefaction
JP4736060B2 (en) Inner nut assembly, anti-corrosion PC steel rod assembly and PC structure
JP3663521B2 (en) Ground seal anchor head seal structure
JP6905425B2 (en) Lock bolt head water stop device
KR102604423B1 (en) Anchor assembly
JP3405441B2 (en) Liquid leakage prevention cap
JP3892003B2 (en) Construction method of cap cover and shield tunnel for grout hole
JP6384714B2 (en) Underground tank and water stopping method for underground tank
JP6467668B2 (en) Slope reinforced soil structure with long-term durability and its construction method
JP6619136B2 (en) Composite column structure and existing concrete column replacement method
JP2899945B2 (en) Head seal structure of anchor for burying ground
JP5146740B2 (en) Step mounting structure
KR102181963B1 (en) Waterproof anchor and tunnel waterproofing techniques using that

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20180313

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20180810

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20181105

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20181113

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20181221

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20190108

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20190121

R150 Certificate of patent or registration of utility model

Ref document number: 6471027

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150