JP6745573B2 - Lock bolt holding jig and spraying method using the same - Google Patents

Lock bolt holding jig and spraying method using the same Download PDF

Info

Publication number
JP6745573B2
JP6745573B2 JP2019120740A JP2019120740A JP6745573B2 JP 6745573 B2 JP6745573 B2 JP 6745573B2 JP 2019120740 A JP2019120740 A JP 2019120740A JP 2019120740 A JP2019120740 A JP 2019120740A JP 6745573 B2 JP6745573 B2 JP 6745573B2
Authority
JP
Japan
Prior art keywords
lock bolt
reinforcing member
main body
body portion
holding jig
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
JP2019120740A
Other languages
Japanese (ja)
Other versions
JP2019157625A (en
Inventor
柳 剛 高
柳 剛 高
雅之 宇次原
雅之 宇次原
塚 大 輔 窪
塚 大 輔 窪
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.)
Railway Technical Research Institute
Nittoc Constructions Co Ltd
Original Assignee
Railway Technical Research Institute
Nittoc Constructions 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 Railway Technical Research Institute, Nittoc Constructions Co Ltd filed Critical Railway Technical Research Institute
Priority to JP2019120740A priority Critical patent/JP6745573B2/en
Publication of JP2019157625A publication Critical patent/JP2019157625A/en
Application granted granted Critical
Publication of JP6745573B2 publication Critical patent/JP6745573B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Description

本発明は地山補強土工と組み合わされた吹付工法と、当該吹付工法において補強部材（鉄筋）を保持するために使用される補強部材保持用治具に関する。 The present invention relates to a spraying method combined with a ground reinforcement earthwork, and a reinforcing member holding jig used for holding a reinforcing member (rebar) in the spraying method.

切土面や自然傾斜の表面に対してモルタル・コンクリートを吹き付けて形成された吹付層（既存吹付層）に、地山補強材（例えばロックボルト）と受圧板を用いて地山補強土工を実施するべき場合が存在する。その様な場合に、既存吹付層に対して吹付材を吹き付けて地山補強材の受圧板を形成する技術が、例えば出願人により既に提案されている。
ここで、モルタル・コンクリートを吹き付けて受圧板を造成するに際しては、受圧板として必要な強度を確保するために、例えば鉄筋の様な補強材を受圧板内に内蔵（収容）して行う。その場合、当該補強材と地山補強材を直交して配置しなければならない。 Perform earth-reinforcing earthwork by using rock reinforcements (such as rock bolts) and pressure plates on the spray layer (existing spray layer) formed by spraying mortar/concrete on the cut surface or the surface of natural slope. There is a case to do. In such a case, for example, the applicant has already proposed a technique for forming a pressure receiving plate of the ground reinforcement by spraying a spray material onto the existing spray layer.
Here, when the pressure receiving plate is formed by spraying mortar/concrete, a reinforcing material such as a reinforcing bar is built in (accommodated) in the pressure receiving plate in order to secure the strength required for the pressure receiving plate. In that case, the reinforcement and the ground reinforcement must be arranged orthogonally.

ここで、切土面や自然傾斜の表面には凹凸や不陸が存在するので、既存吹付層の表面には対応した凹凸、不陸が生じる。その様な凹凸、不陸が存在する既存吹付層表面において、補強材（例えば鉄筋）を地山補強材（例えばロックボルト）に対して直交して配置するためには多数の固定アンカーを打設し、補強材（例えば鉄筋）の設置する角度や延在する方向を調整しなければならない。
しかし、固定アンカーを多数打設した場合には、作業性が低下してしまう。また、既存吹付層の表面における凹凸や不陸が大きい場合には、多数の固定アンカーを打設する作業の精度を高くすることは困難である。 Here, since the cut surface and the surface of natural inclination have unevenness and unevenness, corresponding unevenness and unevenness occur on the surface of the existing spray layer. On the surface of the existing spray layer where there are such irregularities and unevenness, a large number of fixed anchors are placed in order to arrange the reinforcing material (for example, reinforcing bars) at right angles to the natural reinforcing material (for example, rock bolts). However, it is necessary to adjust the installation angle and the extending direction of the reinforcing material (for example, reinforcing bar).
However, when a large number of fixed anchors are placed, workability is reduced. Further, when the surface of the existing spray layer has a large unevenness or unevenness, it is difficult to increase the accuracy of the work for placing a large number of fixed anchors.

その他の従来技術として、トンネル掘削においてロックボルトと吹き付けコンクリートが主たる支保部材になることを開示したものが存在するが（例えば、特許文献１）、上述した従来技術の問題点を解消することは出来ない。 As another conventional technique, there is one that discloses that a rock bolt and sprayed concrete are main supporting members in tunnel excavation (for example, Patent Document 1), but the above-mentioned problems of the conventional technique cannot be solved. Absent.

特開２００２−１２８５５５号公報JP 2002-128555 A

本発明は上述した従来技術の問題点に鑑みて提案されたものであり、地山補強土工と組み合わされた吹付工法においても作業性が良好であり、既存吹付層の表面に凹凸や不陸が存在する法面或いは既存吹付層においても高い作業精度を保持することを可能にする補強部材保持用治具及びそれを用いた吹付工法の提供を目的としている。 The present invention has been proposed in view of the above-mentioned problems of the conventional technology, workability is good even in the spraying method combined with natural ground reinforced earthwork, and unevenness or unevenness on the surface of the existing spraying layer It is an object of the present invention to provide a reinforcing member holding jig capable of maintaining high working accuracy even on existing slopes or existing spraying layers, and a spraying method using the same.

本発明のロックボルト保持用治具（１０、２０：地山補強材接続カプラー）は、
ロックボルト（１）が貫通可能に構成された本体部（１０Ａ、２０Ａ）と、
当該本体部（１０Ａ、２０Ａ）から半径方向外方に延在する延在部分（１０Ｂ、２０Ｂ）と、当該延在部分（１０Ｂ、２０Ｂ）（の例えば半径方向外方端部近傍）に設けられ且つ補強部材（２：例えば異形鉄筋）を保持可能に構成された補強部材固定具（４０Ｃ）を有し、
本体部（１０Ａ、２０Ａ）には雌ネジ（ＦＳ）が形成されており、雌ネジ（ＦＳ）がロックボルト（１）の長手方向全域に形成されている雄ネジ（ＭＳ）に螺合して、ロックボルト（１）の軸方向位置についてロックボルト（１）の地上側先端部よりも地中側の位置に固定され、
当該補強部材固定具（４０Ｃ）は金属板（例えば鋼板）で構成され、一部領域が開放された概略半円筒形に形成され、補強部材（２）を包囲する本体部（４０ＣＡ）と、補強部材（２）の挿入口である開口を構成する補強部材挿入部（４０ＣＢ）と、補強部材挿入部（４０ＣＢ）の一部を切り欠いて本体部（４０ＣＡ）に向けて斜め下方に突出させた突起部（４０ＣＣ）を備え、補強部材挿入部（４０ＣＢ）は本体部（４０ＣＡ）に向かって開口面積が減少しており、
ロックボルト（１）の長手方向全域に形成されている雄ネジ（ＭＳ）に螺合して、ロックボルト（１）の地上側先端部よりも地中側の位置に本体部（１０、２０）に隣接して螺合された固定用ナット（４）を有することを特徴としている。 The lock bolt holding jig (10, 20: natural ground reinforcement connecting coupler) of the present invention is
A body portion (10A, 20A) configured so that the lock bolt (1) can penetrate therethrough;
Provided on the extending portions (10B, 20B) extending radially outward from the main body portion (10A, 20A) and the extending portions (10B, 20B) (for example, in the vicinity of the radially outer end portion). And a reinforcing member fixing tool (40C) configured to be able to hold the reinforcing member (2: deformed bar, for example),
A female screw (FS) is formed on the main body (10A, 20A), and the female screw (FS) is screwed onto a male screw (MS) formed over the entire length of the lock bolt (1) in the longitudinal direction. Regarding the axial position of the lock bolt (1), the lock bolt (1) is fixed to a position on the ground side from the ground-side tip portion of
The reinforcing member fixing tool (40C) is composed of a metal plate (for example, a steel plate), is formed in a substantially semi-cylindrical shape with a partial region open, and is reinforced with a main body portion (40CA) surrounding the reinforcing member (2). A reinforcement member insertion portion (40CB) that constitutes an opening that is an insertion opening of the member (2) and a part of the reinforcement member insertion portion (40CB) are cut out and protruded obliquely downward toward the main body portion (40CA). The protrusion area (40CC) is provided, and the opening area of the reinforcing member insertion section (40CB) decreases toward the main body section (40CA).
The main body portion (10, 20) is screwed into a male screw (MS) formed in the entire region of the lock bolt (1) in the longitudinal direction so that the main body portion (10, 20) is located at a position closer to the ground than the tip of the lock bolt (1) on the ground side. It is characterized by having a fixing nut screwed adjacent (4).

係るロックボルト保持用治具（１０、２０）を用いた本発明の吹付工法においては、
ロックボルト（１）の長手方向全域に形成されている雄ネジ（ＭＳ）にロックボルト保持用治具（１０、２０：地山補強材接続カプラー）の本体部（１０Ａ、２０Ａ）の雌ネジ（ＦＳ）を螺合して、ロックボルト（１）が本体部（１０Ａ、２０Ａ）を貫通して、本体部（１０Ａ、２０Ａ）をロックボルト（１）の軸方向について地上側先端よりも地中側の位置に固定し、
前記ロックボルト保持用治具（１０、２０）の本体部（１０Ａ、２０Ａ）の雌ネジ（ＦＳ）をロックボルト（１）の雄ネジ（ＭＳ）と螺合することに先立って固定用ナット（４）をロックボルト（１）の雄ネジ（ＭＳ）に螺合し、ロックボルト保持用治具（２０）の本体部（２０Ａ）の雌ネジ（ＦＳ）をロックボルト（１）の長手方向全域に形成されている雄ネジ（ＭＳ）と螺合してロックボルト（１）の地上側先端よりも地中側の位置に固定するに際しては、ロックボルト（１）の軸方向位置についてロックボルト保持用治具（２０）を固定用ナット（４）に隣接して固定し、
ロックボルト保持用治具（１０）の半径方向外方（の例えば延在部分１０Ｂの半径方向外方端部近傍）に設けられた補強部材固定具（４０Ｃ）の挿入部（４０ＣＢ）から補強部材固定具（４０Ｃ）（を構成する金属板）の弾性反撥力に抗して補強部材（２）を挿入し、突起部（４０ＣＣ）を通過させて本体部（４０ＣＡ）に収容して保持し、
吹付材（例えば、モルタル・コンクリート）を吹き付けて受圧板（３）を形成することを特徴としている。 In the spraying method of the present invention using such a lock bolt holding jig (10, 20),
The male screw (MS) formed on the entire region of the lock bolt (1) in the longitudinal direction is attached to the female screw (of the main body portion (10A, 20A) of the lock bolt holding jig (10, 20: natural reinforcing material connecting coupler)). FS) is screwed, the lock bolt (1) penetrates the main body part (10A, 20A), and the main body part (10A, 20A) is grounded in the axial direction of the lock bolt (1) rather than the tip on the ground side. Fixed in the side position,
Prior to screwing the female screw (FS) of the body portion (10A, 20A) of the lock bolt holding jig (10, 20) with the male screw (MS) of the lock bolt (1), a fixing nut ( 4) is screwed onto the male screw (MS) of the lock bolt (1), and the female screw (FS) of the main body portion (20A) of the lock bolt holding jig (20) is moved over the entire length of the lock bolt (1). screwed with the male thread (MS) formed in and upon securing the position of the ground side from the ground side tip of the lock bolt (1), the locking bolt holding the axial position of the lock bolt (1) use jig (20) adjacent and fixed to the locking nut (4),
From the insertion portion (40CB) of the reinforcing member fixing tool (40C) provided on the outer side in the radial direction of the lock bolt holding jig (10) (for example, in the vicinity of the outer end in the radial direction of the extending portion 10B). The reinforcing member (2) is inserted against the elastic repulsive force of the fixture (40C) (constituting the metal plate), the protrusion (40CC) is passed through, and the main body (40CA) is accommodated and held.
The pressure receiving plate (3) is formed by spraying a spray material (for example, mortar or concrete).

上述の構成を具備する本発明によれば、補強部材保持用治具（１０、２０：地山補強材接続カプラー）の本体部（１０Ａ、２０Ａ）の雌ネジ（ＦＳ）と地山補強材（１：例えばロックボルト）の雄ネジ（ＭＳ）を螺合することにより補強部材保持用治具（１０、２０）を地山補強材（１）に取り付け、且つ、半径方向外方に位置する補強部材固定具（１０Ｃ、２０Ｃ）に補強部材（２：例えば異形鉄筋）を保持させることにより、補強部材（２）は地山補強材（１）に対して直交する様な相対位置に保持することが出来る。
そのため、多数の固定アンカーを打設して補強材（例えば鉄筋）の設置する角度や延在する方向を調整しなくても、地山補強材（１）と補強部材（２）が直交する様に、両者の相対的な位置関係を保持することが可能となる。 According to the present invention having the above-mentioned configuration, the female screw (FS) of the main body portion (10A, 20A) of the jig for holding the reinforcing member (10, 20: natural ground reinforcement connecting coupler) and the natural ground reinforcement ( 1: Reinforcing member holding jigs (10, 20) are attached to the ground reinforcement member (1) by screwing a male screw (MS) of, for example, a lock bolt, and reinforcement is located radially outward. By holding the reinforcing member (2: deformed rebar, for example) in the member fixing tool (10C, 20C), the reinforcing member (2) is held at a relative position orthogonal to the natural ground reinforcing member (1). Can be done.
Therefore, the ground reinforcement material (1) and the reinforcement member (2) may be orthogonal to each other even if a large number of fixed anchors are not driven to adjust the installation angle and the extending direction of the reinforcement material (for example, reinforcing bars). In addition, it is possible to maintain the relative positional relationship between the two.

また、地山補強材（１）に補強部材保持用治具（１０、２０：地山補強材接続カプラー）を挿入し、補強部材保持用治具（１０、２０）における補強部材固定具（１０Ｃ、２０Ｃ）に補強部材（２）を挿入して、地山補強材（１）に対して補強部材（２）を直角に配置することが出来るので、多数の固定アンカーを打設することに比較して、傾斜面や切土面に積層された既存の吹付層（１００、２００）における作業が容易となり、作業性が向上する。
そして、地山補強材（１）の雄ネジ（ＭＳ）と補強部材保持用治具（１０、２０：地山補強材接続カプラー）の雌ネジ（ＦＳ）を螺合して、補強部材保持用治具（１０、２０）における補強部材固定具（１０Ｃ、２０Ｃ）に補強部材（２）を挿入して、地山補強材（１）に対して補強部材（２）を直角に配置した状態で、コンクリート・モルタル等の吹付材を吹き付けることにより、補強部材（２）を内蔵した吹付材により地山補強材（１：例えばロックボルト）の受圧板（３）が容易に造成される。 Further, a reinforcing member holding jig (10, 20: natural ground reinforcing material connecting coupler) is inserted into the natural reinforcing material (1), and a reinforcing member fixing tool (10C) in the reinforcing member holding jig (10, 20). , 20C) the reinforcing member (2) can be inserted and the reinforcing member (2) can be arranged at a right angle to the natural reinforcing material (1), so it is possible to place a large number of fixed anchors. Then, the work on the existing spray layer (100, 200) laminated on the inclined surface or the cut surface becomes easy, and the workability is improved.
Then, the male screw (MS) of the ground reinforcement material (1) and the female screw (FS) of the jig (10, 20: ground reinforcement material connection coupler) for holding the reinforcement member are screwed together to hold the reinforcement member. In a state in which the reinforcing member (2) is inserted into the reinforcing member fixing tool (10C, 20C) of the jig (10, 20) and the reinforcing member (2) is arranged at right angles to the natural ground reinforcing material (1). By spraying a spraying material such as concrete or mortar, the pressure receiving plate (3) of the ground reinforcement material (1: rock bolt, for example) is easily formed by the spraying material containing the reinforcing member (2).

また傾斜面或いは既存吹付層における凹凸や不陸が大きく、既存の吹付層（２００）の表面における凹凸や不陸が大きい場合には、本発明において、前記補強部材保持用治具（２０）は、地山補強材（１：例えばロックボルト）の軸方向位置が隣接する様に螺合された固定用ナット（４）と共に用いられ、地山補強材（１）の雄ネジ（ＭＳ）と補強部材保持用治具（２０：地山補強材接続カプラー）の本体部（２０Ａ）の雌ネジ（ＦＳ）を螺合するに際して、地山補強材（１）に固定用ナット（４）を螺合し、固定用ナット（４）に隣接して補強部材保持用治具（２０）が配置される様に補強部材保持用治具（２０）の本体部（２０Ａ）の雌ネジ（ＦＳ）を地山補強材（１）に螺合することにより、固定用ナット（４）と補強部材保持用治具（２０）の本体部（２０Ａ）の雌ネジ（ＦＳ）により所謂「ダブルナット」が構成され、地山補強材（１）に対する補強部材保持用治具（２０）の地山補強材（１：例えばロックボルト）の軸方向位置が固定され、変動しなくなる。
そして、補強部材保持用治具（２０）と固定用ナット（４）により補強部材（２：例えば異形鉄筋）を保持すれば、地山補強材軸方向における補強部材（２）の位置が一定に固定・保持されるので、既存の吹付層（２００）の表面における凹凸や不陸が大きくても、既存の吹付材層（２００）の表面から補強部材（２）までの距離（地山補強材軸方向における距離）が一定以上に保持される。
その状態でコンクリート・モルタル等の吹付材を吹き付けることにより、受圧板（３）における補強部材（２）の位置が均一となり、地山補強材（１：例えばロックボルト）の受圧板（３）として必要な強度を保持した受圧板（３）が容易に造成される。 Further, when the unevenness or unevenness on the inclined surface or the existing spraying layer is large and the unevenness or unevenness on the surface of the existing spraying layer (200) is large, in the present invention, the reinforcing member holding jig (20) is , Used together with a fixing nut (4) screwed so that the axial positions of the ground reinforcement (1: rock bolt, for example) are adjacent to each other, and reinforced with the male screw (MS) of the ground reinforcement (1). When screwing the female screw (FS) of the body portion (20A) of the member holding jig (20: natural ground reinforcement connecting coupler), the fixing nut (4) is screwed onto the natural ground reinforcement (1). Then, the female screw (FS) of the main body portion (20A) of the reinforcing member holding jig (20) is grounded so that the reinforcing member holding jig (20) is arranged adjacent to the fixing nut (4). The so-called "double nut" is constituted by the fixing nut (4) and the female screw (FS) of the main body (20A) of the reinforcing member holding jig (20) by being screwed into the mountain reinforcing material (1). The axial position of the ground reinforcement material (1: rock bolt, for example) of the reinforcing member holding jig (20) with respect to the ground reinforcement material (1) is fixed and does not fluctuate.
Then, by holding the reinforcing member (2: deformed rebar, for example) by the reinforcing member holding jig (20) and the fixing nut (4), the position of the reinforcing member (2) in the axial direction of the natural reinforcing material becomes constant. Since it is fixed and held, the distance from the surface of the existing spray material layer (200) to the reinforcing member (2) (ground reinforcement material, even if there are large irregularities or unevenness on the surface of the existing spray layer (200) The distance in the axial direction) is maintained above a certain level.
By spraying a spraying material such as concrete or mortar in that state, the position of the reinforcing member (2) in the pressure receiving plate (3) becomes uniform, and as a pressure receiving plate (3) of the ground reinforcing material (1: rock bolt, for example). The pressure receiving plate (3) having the required strength is easily formed.

本発明の第１実施形態を示す正面断面図である。It is a front sectional view showing a 1st embodiment of the present invention. 図１における補強部材保持用治具の正面断面図である。FIG. 2 is a front cross-sectional view of the reinforcing member holding jig in FIG. 1. 図２における補強部材固定具を示す斜視図である。It is a perspective view which shows the reinforcement member fixing tool in FIG. 図１における補強部材保持用治具の平面図である。It is a top view of the jig for holding a reinforcing member in FIG. 図２、図４の補強部材保持用治具が異形鉄筋を保持する状態を示す正面断面図である。FIG. 5 is a front cross-sectional view showing a state where the reinforcing member holding jig of FIGS. 2 and 4 holds the deformed bar. 補強部材保持用治具により異形鉄筋を保持して配置した状態を示す平面図である。FIG. 6 is a plan view showing a state in which deformed reinforcing bars are held and arranged by a reinforcing member holding jig. 本発明の第２実施形態を示す正面断面図である。It is a front sectional view showing a 2nd embodiment of the present invention. 図７における補強部材保持用治具の正面断面図である。FIG. 8 is a front sectional view of the reinforcing member holding jig in FIG. 7. 補強部材固定具の断面図である。It is sectional drawing of a reinforcement member fixing tool.

以下、添付図面を参照して、本発明の実施形態について説明する。
図示の実施形態において、雄ネジＭＳが形成された地山補強材１としてロックボルトが示されており、補強部材２としては異形鉄筋が示されているが、これに限定される訳ではない。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
In the illustrated embodiment, a rock bolt is shown as the ground reinforcement member 1 on which the male screw MS is formed, and a deformed bar is shown as the reinforcement member 2, but the present invention is not limited to this.

最初に図１〜図６を参照して、本発明の第１実施形態を説明する。
図１において、既存吹付層１００にロックボルト挿入用のボーリング孔ＢＨが切削されており、ボーリング孔ＢＨに固化材Ｃ（モルタル、コンクリート、セメント等）を充填した状態で、ロックボルト１（地山補強材）が挿入される。ロックボルト１には、後述する補強部材保持用治具１０の図示しない雌ネジと螺合する雄ネジＭＳが形成されている。
ロックボルト１の地上側端部（上端部）近傍には補強部材保持用治具１０（ロックボルト接続カプラー）が配置される。補強部材保持用治具１０の本体部１０Ａに形成された雌ネジＦＳ（図２）がロックボルト１の雄ネジＭＳを螺合することにより、補強部材保持用治具１０はロックボルト１の地上側端部（上端部）近傍に固定される。 First, a first embodiment of the present invention will be described with reference to FIGS.
In FIG. 1, a boring hole BH for inserting a rock bolt is cut in the existing spray layer 100, and the boring hole BH is filled with a solidifying material C (mortar, concrete, cement, etc.), and the rock bolt 1 (ground rock). Reinforcing material) is inserted. The lock bolt 1 is formed with a male screw MS that is screwed into a female screw (not shown) of a reinforcing member holding jig 10 described later.
A reinforcing member holding jig 10 (lock bolt connecting coupler) is arranged near the ground-side end (upper end) of the lock bolt 1. The female screw FS (FIG. 2) formed on the main body portion 10A of the reinforcing member holding jig 10 is screwed onto the male screw MS of the lock bolt 1, so that the reinforcing member holding jig 10 is grounded above the lock bolt 1. It is fixed near the side edge (upper edge).

補強部材保持用治具１０（ロックボルト接続カプラー）の詳細が図２に示されている。
図２において、補強部材保持用治具１０は中空筒状部材として構成された本体部１０Ａを有しており、その内壁面には雌ネジＦＳが形成され、雌ネジＦＳはロックボルト１の雄ネジＭＳに螺合する。そして補強部材保持用治具１０は、本体部１０Ａから半径方向外方に延在する延在部分１０Ｂ（１０Ｂ１〜１０Ｂ４）と、延在部分１０Ｂの半径方向外方端部近傍の上面に設けられた補強部材固定具１０Ｃをも有している。
補強部材保持用治具１０の本体部１０Ａは、中空円筒形の金属製材料（例えば鋼材）で構成されており、内壁面に雌ネジＦＳが形成されている。ただし、図示はされていないが、本体部１０Ａを断面多角形の中空筒状体で構成することも可能である。 Details of the reinforcing member holding jig 10 (lock bolt connecting coupler) are shown in FIG.
In FIG. 2, the reinforcing member holding jig 10 has a main body portion 10A configured as a hollow cylindrical member, and an internal thread FS is formed on the inner wall surface thereof, and the internal thread FS is the male thread of the lock bolt 1. Screw to the screw MS. The reinforcing member holding jig 10 is provided on the extending portions 10B (10B1 to 10B4) extending outward from the main body 10A in the radial direction, and on the upper surface of the extending portion 10B in the vicinity of the outer end in the radial direction. It also has a reinforcing member fixing tool 10C.
The main body 10A of the reinforcing member holding jig 10 is made of a hollow cylindrical metal material (for example, steel), and has an internal thread FS formed on the inner wall surface. However, although not shown, the main body 10A may be formed of a hollow cylindrical body having a polygonal cross section.

延在部分１０Ｂ（１０Ｂ１〜１０Ｂ４）は、図１〜図６では本体部１０Ａから円周方向等間隔に（中心角が等しく９０度となるように）４つ配置され（図４参照）、延在部分１０Ｂにおける半径方向内側端部は、溶接等の公知の態様で本体部１０Ａの側面に固定される。
延在部分１０Ｂは例えば断面逆Ｌ字状の鋼材で構成され、図２で示す様に、延在部分１０Ｂの高さ寸法は半径方向外方ほど減少している。 In FIGS. 1 to 6, four extending portions 10B (10B1 to 10B4) are arranged at equal intervals in the circumferential direction (so that the central angles are equal to 90 degrees) (see FIG. 4). The radially inner end of the existing portion 10B is fixed to the side surface of the main body 10A by a known method such as welding.
The extending portion 10B is made of, for example, a steel material having an inverted L-shaped cross section, and as shown in FIG. 2, the height dimension of the extending portion 10B is reduced outward in the radial direction.

延在部分１０Ｂにおいて、本体部１０Ａに対して対称位置にある（相対する）１対の延在部分１０Ｂ１、１０Ｂ２におけるロックボルト軸方向（図２の上下方向）の本体部１０Ａ下面からの高さＨ１２は、他の１対の延在部分１０Ｂ３、１０Ｂ４（図２では延在部分１０Ｂ４は図示せず）のロックボルト軸方向（図２で上下方向）の高さ寸法Ｈ３４よりも小さく設定される。
そして、前記高さ寸法Ｈ３４と高さ寸法Ｈ１２の差異は、少なくとも異形鉄筋２（補強部材）の直径寸法よりも大きく設定されている。以て、異形鉄筋２を配置した際に、延在部分１０Ｂ１、１０Ｂ２に保持される異形鉄筋２と、延在部分１０Ｂ３、１０Ｂ４に保持される異形鉄筋２とが干渉せずに、互い違いに延在せしめている。
なお、４つの延在部分１０Ｂ１〜１０Ｂ４は、本体部１０Ａに対する相対位置、延在する方向を除き、同一に構成されている。 In the extending portion 10B, the height from the lower surface of the main body portion 10A in the lock bolt axial direction (vertical direction in FIG. 2) in the pair of extending portions 10B1 and 10B2 that are symmetrical (opposing) to the main body portion 10A. H12 is set to be smaller than the height dimension H34 of the other pair of extending portions 10B3, 10B4 (the extending portion 10B4 is not shown in FIG. 2) in the lock bolt axial direction (vertical direction in FIG. 2). ..
The difference between the height dimension H34 and the height dimension H12 is set to be larger than at least the diameter dimension of the deformed reinforcing bar 2 (reinforcing member). As a result, when the deformed reinforcing bars 2 are arranged, the deformed reinforcing bars 2 held by the extending portions 10B1 and 10B2 and the deformed reinforcing bars 2 held by the extending portions 10B3, 10B4 do not interfere with each other and extend in a staggered manner. It is present.
The four extending portions 10B1 to 10B4 have the same configuration except for the relative position with respect to the main body portion 10A and the extending direction.

延在部分１０Ｂの半径方向外方端部近傍の上面に設けられた補強部材固定具１０Ｃは、図３に示す様に、一部領域（図３では上方）が開放した断面多角形の中空筒形に金属板（例えば鋼板）を成型した部材である。そして、開放した領域から異形鉄筋２が挿入される。
補強部材保持用治具１０を上面から見た状態が図４で示されている。図４において、本体部１０Ａから円周方向について等間隔に（中心角が等しく９０度となる様に）延在部分１０Ｂ１〜１０Ｂ４が半径方向外方に延在しており、その半径方向外方端部近傍の上面には補強部材固定具１０Ｃが固定されている。
補強部材固定具１０Ｃは、その軸方向（保持する異形鉄筋２の軸方向、配策方向）が、固定される延在部分１０Ｂ１〜１０Ｂ４が延在する方向（半径方向）に対して直角になる様に、延在部分１０Ｂ１〜１０Ｂ４の各々に固定されている。 As shown in FIG. 3, the reinforcing member fixing tool 10C provided on the upper surface near the radially outer end of the extending portion 10B has a polygonal cross-section hollow tube with a partial area (upper side in FIG. 3) open. It is a member formed by molding a metal plate (for example, a steel plate). Then, the deformed bar 2 is inserted from the opened region.
A state in which the reinforcing member holding jig 10 is viewed from above is shown in FIG. In FIG. 4, extending portions 10B1 to 10B4 extend outward in the radial direction from the main body portion 10A at equal intervals in the circumferential direction (so that the central angles are equal to 90 degrees) and the outward direction in the radial direction. A reinforcing member fixture 10C is fixed to the upper surface near the end.
The reinforcing member fixing tool 10C has its axial direction (axial direction of the deformed reinforcing bar 2 to be held, routing direction) perpendicular to the extending direction (radial direction) of the extending portions 10B1 to 10B4 to be fixed. Similarly, it is fixed to each of the extending portions 10B1 to 10B4.

図２、図４で示す補強部材保持用治具１０により異形鉄筋２（補強部材）を保持した状態が図５に示されている。上述した様に、補強部材保持用治具１０は、図示しないロックボルト１の上端部近傍に固定される。
図５において、補強部材保持用治具１０の延在部分１０Ｂ（１０Ｂ１〜１０Ｂ４）の半径方向外方端部近傍の補強部材固定具１０Ｃには、異形鉄筋２１、２２が保持されている。そして、図５で紙面に垂直な方向には、延在部分１０Ｂ１、１０Ｂ２の補強部材固定具１０Ｃに保持された異形鉄筋２１が保持（配策）されている。また、延在部分１０Ｂ３、１０Ｂ４（１０Ｂ４は図５では図示せず）の補強部材固定具１０Ｃには、図５において左右方向に延在して配策される異形鉄筋２２が保持されている。 FIG. 5 shows a state in which the deformed reinforcing bar 2 (reinforcing member) is held by the reinforcing member holding jig 10 shown in FIGS. 2 and 4. As described above, the reinforcing member holding jig 10 is fixed near the upper end of the lock bolt 1 (not shown).
In FIG. 5, the deformed rebars 21 and 22 are held by the reinforcing member fixture 10C near the radially outer end of the extending portion 10B (10B1 to 10B4) of the reinforcing member holding jig 10. Then, in the direction perpendicular to the paper surface in FIG. 5, the deformed reinforcing bars 21 held by the reinforcing member fixing tools 10C of the extending portions 10B1 and 10B2 are held (routed). Further, the reinforcing member fixing tool 10C of the extending portions 10B3, 10B4 (10B4 is not shown in FIG. 5) holds the deformed reinforcing bar 22 which extends in the left-right direction in FIG.

異形鉄筋２１と異形鉄筋２２は、補強部材保持用治具１０を設けた空間或いはロックボルト１（図１）の施工領域の上方空間において垂直に交差する。
ここで、異形鉄筋２１が延在している平面と異形鉄筋２２が延在している平面（概略同一の平面）は、ロックボルト１（図１）の軸方向（補強部材保持用治具１０の本体部１０Ａの軸方向）と直交している。換言すれば、図５、図１から明らかなように、異形鉄筋２（２１、２２：補強部材）とロックボルト１（地山補強材）は、直交する様な相対位置に保持されている。 The deformed bar 21 and the deformed bar 22 vertically intersect each other in the space where the jig 10 for holding the reinforcing member is provided or in the space above the construction region of the lock bolt 1 (FIG. 1).
Here, the plane in which the deformed bar 21 extends and the plane in which the deformed bar 22 extends (generally the same plane) are in the axial direction of the lock bolt 1 (FIG. 1) (the jig 10 for holding the reinforcing member). Of the main body portion 10A). In other words, as is clear from FIGS. 5 and 1, the deformed reinforcing bars 2 (21, 22: reinforcing members) and the lock bolts 1 (ground reinforcement members) are held at orthogonal relative positions.

図６は、補強部材保持用治具１０により異形鉄筋２（補強部材）を保持して、ロックボルト１（図１）周辺に異形鉄筋２を配置した状態を示している。図６で示す状態で、ロックボルト１の施工領域に吹付材（例えば、モルタル・コンクリート）を吹き付けることにより、異形鉄筋２（補強部材）を内蔵したロックボルト１（地山補強材）の受圧板３（図１参照）を形成することが出来る。
なお図１において、符号５は受圧板３を地山側に押圧定着させる定着板を示しており、符号６は定着ナットを示している。
また、図６で示すロックボルトの施工領域と隣接する領域においても、図１〜図６を参照して説明した態様で、異形鉄筋２（補強部材）を内蔵した受圧板３を形成することが出来る。図６において、点線で示す異形鉄筋２は、図６で示す補強部材保持用治具１０とは別の補強部材保持用治具１０で保持されている異形鉄筋２である。 FIG. 6 shows a state in which the deformed bar 2 (reinforcing member) is held by the reinforcing member holding jig 10 and the deformed bar 2 is arranged around the lock bolt 1 (FIG. 1). In the state shown in FIG. 6, by spraying a spraying material (for example, mortar/concrete) on the construction area of the lock bolt 1, the pressure receiving plate of the lock bolt 1 (reinforcing material) having the deformed bar 2 (reinforcing member) built therein. 3 (see FIG. 1) can be formed.
In FIG. 1, reference numeral 5 indicates a fixing plate for pressing and fixing the pressure receiving plate 3 to the ground side, and reference numeral 6 indicates a fixing nut.
Further, also in the area adjacent to the construction area of the lock bolt shown in FIG. 6, it is possible to form the pressure receiving plate 3 in which the deformed rebar 2 (reinforcing member) is incorporated in the manner described with reference to FIGS. I can. In FIG. 6, the deformed bar 2 shown by a dotted line is the deformed bar 2 held by a reinforcing member holding jig 10 different from the reinforcing member holding jig 10 shown in FIG.

第１実施形態の施工に際しては、先ず既存吹付層１００に切削され且つ固化材Ｃが充填されているボーリング孔ＢＨにロックボルト１を挿入し、ロックボルト１の雄ネジＭＳに補強部材保持用治具１０の本体部１０Ａの雌ネジＦＳを螺合して、補強部材保持用治具１０をロックボルト１に固定する。
次に、補強部材保持用治具１０の延在部分１０Ｂの半径方向外方端部近傍に設けられた補強部材固定具１０Ｃに異形鉄筋２（２１、２２）を挿入して、保持する。この状態で、異形鉄筋２（異形鉄筋２１、２２）は補強部材保持用治具１０を設けた空間において相互に垂直に交差し、且つ、ロックボルト１に対して直交する様な相対位置に保持される。
そして、異形鉄筋２がロックボルト１に直交して保持された状態で、吹付材（例えば、モルタル・コンクリート）を吹き付けて、補強部材２を内蔵したロックボルト１（地山補強材）の受圧板３を形成する。 In the construction of the first embodiment, first, the lock bolt 1 is inserted into the boring hole BH that is cut in the existing spray layer 100 and filled with the solidifying material C, and the male screw MS of the lock bolt 1 is fixed to the reinforcing member holding jig. The reinforcing member holding jig 10 is fixed to the lock bolt 1 by screwing the female screw FS of the main body portion 10A of the tool 10.
Next, the deformed bar 2 (21, 22) is inserted and held in the reinforcing member fixing tool 10C provided in the vicinity of the radially outer end of the extending portion 10B of the reinforcing member holding jig 10. In this state, the deformed bars 2 (the deformed bars 21 and 22) are held at relative positions such that they are perpendicular to each other in the space where the reinforcing member holding jig 10 is provided and are orthogonal to the lock bolt 1. To be done.
Then, in a state where the deformed rebar 2 is held orthogonally to the lock bolt 1, a spray material (for example, mortar/concrete) is sprayed and the pressure plate of the lock bolt 1 (ground reinforcement material) having the reinforcing member 2 built therein. 3 is formed.

図１〜図６の第１実施形態によれば、補強部材保持用治具１０の本体部１０Ａの雌ネジＦＳとロックボルト１の雄ネジＭＳを螺合して補強部材保持用治具１０をロックボルト１に取り付け、且つ、半径方向外方に位置する補強部材固定具１０Ｃに異形鉄筋２を保持させることにより、異形鉄筋２をロックボルト１に対して直交する様な相対位置に保持することが出来る。そのため、多数の固定アンカーを打設して補強材（例えば鉄筋）の設置する角度や延在する方向を調整する必要がない。
ここで、異形鉄筋２は、補強部材保持用治具１０から円周方向に等間隔で（中心角が等しく９０度となるように）配置された延在部分１０Ｂに設置した補強部材固定具１０Ｃにより保持されるため、直交する２方向に延在する異形鉄筋２（異形鉄筋２１、２２）は、ロックボルトの施工領域上で垂直に交差するが、図２で示す高さ寸法Ｈ１２、Ｈ３４は異形鉄筋２の直径以上の差異があるため、異形鉄筋２１、２２が干渉することはない。 According to the first embodiment of FIGS. 1 to 6, the female screw FS of the main body portion 10A of the reinforcing member holding jig 10 and the male screw MS of the lock bolt 1 are screwed together to form the reinforcing member holding jig 10. Holding the deformed reinforcing bar 2 at a relative position orthogonal to the lock bolt 1 by attaching the deformed reinforcing bar 2 to the lock bolt 1 and holding the reinforcing member fixing tool 10C positioned radially outward. Can be done. Therefore, it is not necessary to drive a large number of fixed anchors to adjust the installation angle and the extending direction of the reinforcing material (for example, reinforcing bars).
Here, the deformed reinforcing bars 2 are provided on the reinforcing member fixing tool 10C installed on the extending portions 10B arranged at equal intervals in the circumferential direction from the reinforcing member holding jig 10 (so that the central angles are equal to 90 degrees). Since the deformed rebars 2 (deformed bars 21 and 22) extending in two orthogonal directions intersect vertically on the construction area of the lock bolt, the height dimensions H12 and H34 shown in FIG. Since there is a difference of not less than the diameter of the deformed rebar 2, the deformed rebars 21 and 22 do not interfere with each other.

また、ロックボルト１に補強部材保持用治具１０を挿入し、補強部材保持用治具１０における補強部材固定具１０Ｃに異形鉄筋２（補強部材）を挿入すれば、多数の固定アンカーを打設することなく、ロックボルト１の軸方向に対して異形鉄筋２が延在する（配策される）方向が直交する。そのため、傾斜面や切土面に積層された既存の吹付層１００における作業が容易となり、作業性が向上する。
そして、上述の様に、ロックボルト１に対して異形鉄筋２を直角に配置した状態で、コンクリート・モルタル等の吹付材を吹き付けることにより、異形鉄筋２を内蔵した吹付材によりロックボルト１の受圧板３が、高品質を保ちつつ容易に造成される。 Further, if the reinforcing member holding jig 10 is inserted into the lock bolt 1 and the deformed reinforcing bar 2 (reinforcing member) is inserted into the reinforcing member fixing tool 10C of the reinforcing member holding jig 10, a large number of fixed anchors are placed. Without doing so, the direction in which the deformed rebar 2 extends (is routed) is orthogonal to the axial direction of the lock bolt 1. Therefore, the work on the existing spray layer 100 laminated on the inclined surface or the cut surface becomes easy, and the workability is improved.
Then, as described above, the deformed reinforcing bars 2 are arranged at right angles to the lock bolt 1, and by spraying a spraying material such as concrete or mortar, the pressure receiving force of the lock bolt 1 is received by the spraying material containing the deformed reinforcing bars 2. The plate 3 is easily produced while maintaining high quality.

次に、図７、図８を参照して、本発明の第２実施形態を説明する。
第１実施形態では図１で示す様に、既存吹付層１００の表面が平坦であるのに対して、第２実施形態では、図７で示す様に既存吹付層２００の表面における凹凸や不陸が大きい場合に実施される。
以下、図１〜図６の第１実施形態と異なる点を主として、図７、図８の第２実施形態を説明する。 Next, a second embodiment of the present invention will be described with reference to FIGS.
In the first embodiment, as shown in FIG. 1, the surface of the existing spray layer 100 is flat, whereas in the second embodiment, as shown in FIG. 7, unevenness or unevenness on the surface of the existing spray layer 200. Is carried out when is large.
Hereinafter, the second embodiment of FIGS. 7 and 8 will be described, mainly about the points different from the first embodiment of FIGS. 1 to 6.

図７において、既存吹付層２００に切削されたボーリング孔ＢＨにロックボルト１（地山補強材）が挿入されている。
ロックボルト１の地上側端部（上端部）近傍には補強部材保持用治具２０（ロックボルト接続カプラー）が配置され、補強部材保持用治具２０は本体部２０Ａを有し、本体部２０Ａには図示しない雌ネジが形成されており、当該雌ネジはロックボルト１の雄ネジＭＳと螺合している。当該雌ネジ（図示せず）と雄ネジＭＳとの螺合により、補強部材保持用治具２０はロックボルト１の地上側端部（上端部）近傍に固定される。
ロックボルト１の軸方向位置において、補強部材保持用治具２０の本体部２０Ａに隣接して、地中側には固定用ナット４が螺合されている。そして、固定用ナット４と補強部材保持用治具２０の本体部２０Ａの雌ネジＦＳ（図８参照）により、所謂「ダブルナット」が構成され、ロックボルト１に対する補強部材保持用治具２０のロックボルト軸方向位置が固定され、変動しない様に構成されている。 In FIG. 7, the rock bolt 1 (ground reinforcement material) is inserted into the boring hole BH cut in the existing spray layer 200.
A reinforcing member holding jig 20 (lock bolt connecting coupler) is arranged near the ground-side end (upper end) of the lock bolt 1, and the reinforcing member holding jig 20 has a main body 20A. Is formed with a female screw (not shown), and the female screw is engaged with the male screw MS of the lock bolt 1. The reinforcing member holding jig 20 is fixed near the ground-side end (upper end) of the lock bolt 1 by screwing the female screw (not shown) and the male screw MS.
At the axial position of the lock bolt 1, a fixing nut 4 is screwed on the underground side adjacent to the main body portion 20A of the reinforcing member holding jig 20. A so-called “double nut” is configured by the fixing nut 4 and the female screw FS (see FIG. 8) of the main body portion 20A of the reinforcing member holding jig 20. The position of the lock bolt in the axial direction is fixed so that it does not change.

図７における補強部材保持用治具２０は、図８で詳細に示されている。
図８において、補強部材保持用治具２０の本体部２０Ａには雌ネジＦＳが形成されており、それに加えて、本体部２０Ａの下方には固定用ナット４が設けられている。
上述した様に、雌ネジＦＳを形成した補強部材保持用治具２０と固定用ナット４は、「ダブルナット」を構成している。
但し、固定用ナット４は補強部材保持用治具２０の構成部品ではない。換言すれば、固定用ナット４と補強部材保持用治具２０とは別部品である。ただし、固定用ナット４を補強部材保持用治具２０の一部として構成することも可能である。 The reinforcing member holding jig 20 in FIG. 7 is shown in detail in FIG.
In FIG. 8, a female screw FS is formed on the main body portion 20A of the reinforcing member holding jig 20, and in addition, a fixing nut 4 is provided below the main body portion 20A.
As described above, the reinforcing member holding jig 20 having the female screw FS and the fixing nut 4 constitute a “double nut”.
However, the fixing nut 4 is not a component of the reinforcing member holding jig 20. In other words, the fixing nut 4 and the reinforcing member holding jig 20 are separate parts. However, the fixing nut 4 may be configured as a part of the reinforcing member holding jig 20.

図８において、補強部材保持用治具２０は、雌ネジＦＳが形成された本体部２０Ａと、本体部２０Ａから半径方向外方に延在する延在部分２０Ｂと、延在部分２０Ｂの半径方向外方端部近傍に設けられた補強部材固定具２０Ｃを有している。
補強部材保持用治具２０の構造は、図１〜図６で示す第１実施形態の補強部材保持用治具１０と同様である。
図７、図８の第２実施形態においても、第１実施形態と同様に、異形鉄筋２は補強部材保持用治具２０の補強部材固定具２０Ｃにより保持され、その際、異形鉄筋２はロックボルト１に対して直交して保持される。また、２方向に延在する異形鉄筋２は、相互に直角に交差する。 In FIG. 8, the reinforcing member holding jig 20 includes a main body portion 20A formed with a female screw FS, an extending portion 20B extending radially outward from the main body portion 20A, and a radial direction of the extending portion 20B. The reinforcing member fixture 20C is provided near the outer end.
The structure of the reinforcing member holding jig 20 is the same as that of the reinforcing member holding jig 10 of the first embodiment shown in FIGS. 1 to 6.
In the second embodiment shown in FIGS. 7 and 8, as in the first embodiment, the deformed bar 2 is held by the reinforcing member fixture 20C of the reinforcing member holding jig 20, and at that time, the deformed bar 2 is locked. It is held orthogonal to the bolt 1. Further, the deformed bars 2 extending in two directions intersect each other at a right angle.

図７において、補強部材保持用治具２０は固定用ナット４と共に所謂「ダブルナット」を構成しているので、補強部材保持用治具２０で保持される異形鉄筋２は、ロックボルト１の軸方向における位置が一定に固定される。
この状態で、吹付材（例えば、モルタル・コンクリート）を吹き付けることにより、異形鉄筋２（補強部材）を内蔵した受圧板３が形成される。 In FIG. 7, since the reinforcing member holding jig 20 constitutes a so-called “double nut” together with the fixing nut 4, the deformed reinforcing bar 2 held by the reinforcing member holding jig 20 is the shaft of the lock bolt 1. The position in the direction is fixed.
In this state, by spraying a spray material (for example, mortar/concrete), the pressure receiving plate 3 having the deformed reinforcing bar 2 (reinforcing member) built therein is formed.

本発明の第２実施形態によれば、図７で示す様に既存吹付面２００における凹みが大きくても、補強部材保持用治具２０と固定用ナット４による所謂「ダブルナット」構造により、補強部材保持用治具２０のロックボルト１の軸方向における位置が固定される。そのため、補強部材保持用治具２０のロックボルト１の軸方向が変動してしまうことが防止される。
そのため、補強部材保持用治具２０のロックボルト１の軸方向における位置を適宜調節することにより、既存吹付面２００における凹凸が大きくても、異形鉄筋２を適正なレベル（ロックボルトの軸方向位置）に調整して、既存の吹付材層２００の表面から異形鉄筋２までの距離（ロックボルト軸方向における距離）が一定以上に保持することが出来る。 According to the second embodiment of the present invention, even if the existing spray surface 200 has a large recess as shown in FIG. 7, it is reinforced by the so-called “double nut” structure including the reinforcing member holding jig 20 and the fixing nut 4. The axial position of the lock bolt 1 of the member holding jig 20 is fixed. Therefore, the axial direction of the lock bolt 1 of the reinforcing member holding jig 20 is prevented from changing.
Therefore, by appropriately adjusting the position of the reinforcing member holding jig 20 in the axial direction of the lock bolt 1, even if the unevenness on the existing spraying surface 200 is large, the deformed bar 2 is at an appropriate level (the axial position of the lock bolt). ), the distance from the surface of the existing spray material layer 200 to the deformed bar 2 (distance in the lock bolt axial direction) can be maintained at a certain value or more.

その状態でコンクリート・モルタル等の吹付材を吹き付けることにより、受圧板３における異形鉄筋２の位置が均一となり、既存吹付面２００における凹凸や不陸が大きくても、鉄筋が適正に配置された受圧板３を形成することが出来る。
換言すれば、既存の吹付層２００の表面における凹凸や不陸が大きくても、ロックボルト１の受圧板３として必要な強度を保持した受圧板３が容易に造成される。 By spraying a spraying material such as concrete or mortar in that state, the deformed reinforcing bars 2 on the pressure receiving plate 3 are evenly positioned, and even if the existing spraying surface 200 has large irregularities or unevenness, the reinforcing bars are properly arranged to receive pressure. The plate 3 can be formed.
In other words, the pressure receiving plate 3 having the required strength as the pressure receiving plate 3 of the lock bolt 1 can be easily formed even if the surface of the existing spray layer 200 has large irregularities or unevenness.

図７、図８の第２実施形態におけるその他の構成及び作用効果については、図１〜図６の第１実施形態と同様であり、重複した説明は省略する。 Other configurations and operational effects of the second embodiment shown in FIGS. 7 and 8 are the same as those of the first embodiment shown in FIGS. 1 to 6, and redundant description will be omitted.

図９は、第１〜第３実施形態における補強部材固定具１０Ｃ、２０Ｃ、３０Ｃの変形例を示している。
図９において、補強部材固定具４０Ｃは金属板（例えば鋼板）で構成されており、一部領域が開放された概略半円筒形に成型されている。補強部材固定具４０Ｃは、異形鉄筋２（図９では図示せず）を包囲する本体部４０ＣＡと、異形鉄筋２の挿入口である開口を構成する挿入部４０ＣＢと、補強部材挿入部４０ＣＢの一部を切り欠いて異形鉄筋の挿入通路に向けて斜め下方に突出させた突起部４０ＣＣを備えている。
挿入部４０ＣＢは、本体部４０ＣＡに向かって開口面積が減少する様に構成されている。 FIG. 9: has shown the modification of the reinforcement member fixing tools 10C, 20C, 30C in 1st-3rd embodiment.
In FIG. 9, the reinforcing member fixing tool 40C is made of a metal plate (for example, a steel plate), and is molded in a substantially semi-cylindrical shape with a partial area open. The reinforcing member fixture 40C includes a main body portion 40CA that surrounds the deformed rebar 2 (not shown in FIG. 9), an insertion portion 40CB that forms an opening that is an insertion port of the deformed rebar 2, and a reinforcing member insertion portion 40CB. It is provided with a protrusion 40CC which is cut out to project obliquely downward toward the insertion passage of the deformed rebar.
The insertion portion 40CB is configured so that the opening area decreases toward the main body portion 40CA.

異形鉄筋２を挿入部４０ＣＢから挿入する際に、異形鉄筋２は、大きく開口した挿入部４０ＣＢから、補強部材固定具４０Ｃを構成する金属板の弾性反撥力に抗して突起部４０ＣＣを通過し、ワンタッチで簡単に本体部４０ＣＡに収容される。
一方、本体部４０ＣＡに収容された異形鉄筋２は、本体部４０ＣＡから外れようとすると突起部４０ＣＣと干渉するので、異形鉄筋２が補強部材固定具４０Ｃから外れてしまうことが防止される。 When inserting the deformed reinforcing bar 2 from the insertion section 40CB, the deformed reinforcing bar 2 passes through the protruding section 40CC from the insertion section 40CB having a large opening, against the elastic repulsion force of the metal plate constituting the reinforcing member fixing tool 40C. , Can be easily accommodated in the main body portion 40CA with one touch.
On the other hand, the deformed rebar 2 accommodated in the main body portion 40CA interferes with the protrusion 40CC when the deformed rebar 2 tries to come off the main body portion 40CA, so that the deformed rebar 2 is prevented from coming off the reinforcing member fixing tool 40C.

図示の実施形態はあくまでも例示であり、本発明の技術的範囲を限定する趣旨の記述ではないことを付記する。
上述した様に、補強部材保持用治具１０の本体部１０Ａの平面形状は円形として図示されているが、平面形状を多角形に構成することが可能である。 It should be noted that the illustrated embodiment is merely an example and does not limit the technical scope of the present invention.
As described above, the main body portion 10A of the reinforcing member holding jig 10 is illustrated as having a circular planar shape, but the planar shape may be polygonal.

１・・・ロックボルト（地山補強材）
２、２１、２２・・・異形鉄筋（補強部材）
３・・・受圧板
４・・・固定用ナット
５・・・定着板
６・・・定着ナット
１０、２０・・・補強部材保持用治具（ロックボルト接続カプラー）
１０Ａ、２０Ａ・・・本体部
１０Ｂ、２０Ｂ・・・延在部分
１０Ｃ、２０Ｃ、４０Ｃ・・・補強部材固定具
４０ＣＡ・・・補強部材固定具の本体部
４０ＣＢ・・・挿入部
４０ＣＣ・・・突起部
１００、２００・・・既存吹付層
ＢＨ・・・ボーリング孔 1... Rock bolt (ground reinforcement material)
2, 21, 22... Deformed bar (reinforcing member)
3... Pressure receiving plate 4... Fixing nut 5... Fixing plate 6... Fixing nuts 10, 20... Retaining member holding jig (lock bolt connecting coupler)
10A, 20A... Main body 10B, 20B... Extension parts 10C, 20C, 40C... Reinforcement member fixing tool 40CA... Reinforcement member fixing body 40CB... Insertion portion 40CC... Protrusions 100, 200... Existing spray layer BH... Boring hole

Claims (2)

ロックボルト（１）が貫通可能に構成された本体部（１０Ａ、２０Ａ）と、
当該本体部（１０Ａ、２０Ａ）から半径方向外方に延在する延在部分（１０Ｂ、２０Ｂ）と、当該延在部分（１０Ｂ、２０Ｂ）に設けられ且つ補強部材（２）を保持可能に構成された補強部材固定具（４０Ｃ）を有し、
本体部（１０Ａ、２０Ａ）には雌ネジ（ＦＳ）が形成されており、雌ネジ（ＦＳ）がロックボルト（１）の長手方向全域に形成されている雄ネジ（ＭＳ）に螺合して、ロックボルト（１）の軸方向位置についてロックボルト（１）の地上側先端部よりも地中側の位置に固定され、
当該補強部材固定具（４０Ｃ）は金属板で構成され、一部領域が開放された概略半円筒形に形成され、補強部材（２）を包囲する本体部（４０ＣＡ）と、補強部材（２）の挿入口である開口を構成する補強部材挿入部（４０ＣＢ）と、補強部材挿入部（４０ＣＢ）の一部を切り欠いて本体部（４０ＣＡ）に向けて斜め下方に突出させた突起部（４０ＣＣ）を備え、補強部材挿入部（４０ＣＢ）は本体部（４０ＣＡ）に向かって開口面積が減少しており、
ロックボルト（１）の長手方向全域に形成されている雄ネジ（ＭＳ）に螺合して、ロックボルト（１）の地上側先端部よりも地中側の位置に本体部（１０、２０）に隣接して螺合された固定用ナット（４）を有することを特徴とするロックボルト保持用治具。 A body portion (10A, 20A) configured so that the lock bolt (1) can penetrate therethrough;
An extending portion (10B, 20B) extending radially outward from the main body portion (10A, 20A) and a reinforcing member (2) provided on the extending portion (10B, 20B) and capable of holding the reinforcing member (2) The reinforcing member fixing tool (40C)
A female screw (FS) is formed on the main body (10A, 20A), and the female screw (FS) is screwed onto a male screw (MS) formed over the entire length of the lock bolt (1) in the longitudinal direction. Regarding the axial position of the lock bolt (1), the lock bolt (1) is fixed to a position on the ground side from the ground-side tip portion of
The reinforcing member fixing tool (40C) is made of a metal plate, is formed in a substantially semi-cylindrical shape with a partial region open, and has a main body (40CA) surrounding the reinforcing member (2) and a reinforcing member (2). Of the reinforcing member insertion portion (40CB) that constitutes an opening that is an insertion opening of the member, and a protruding portion (40CC) formed by notching a part of the reinforcing member insertion portion (40CB) and projecting it obliquely downward toward the main body portion (40CA). ), the opening area of the reinforcing member insertion portion (40CB) decreases toward the main body portion (40CA),
The main body portion (10, 20) is screwed into a male screw (MS) formed in the entire region of the lock bolt (1) in the longitudinal direction so that the main body portion (10, 20) is located at a position closer to the ground than the tip of the lock bolt (1) on the ground side. A jig for holding a lock bolt, comprising a fixing nut (4) screwed adjacent to the lock bolt . 請求項１のロックボルト保持用治具（１０、２０）を用いた吹付工法において、
ロックボルト（１）の長手方向全域に形成されている雄ネジ（ＭＳ）にロックボルト保持用治具（１０、２０）の本体部（１０Ａ、２０Ａ）の雌ネジ（ＦＳ）を螺合して、ロックボルト（１）が本体部（１０Ａ、２０Ａ）を貫通して、本体部（１０Ａ、２０Ａ）をロックボルト（１）の軸方向について地上側先端よりも地中側の位置に固定し、
前記ロックボルト保持用治具（１０、２０）の本体部（１０Ａ、２０Ａ）の雌ネジ（ＦＳ）をロックボルト（１）の雄ネジ（ＭＳ）と螺合することに先立って固定用ナット（４）をロックボルト（１）の雄ネジ（ＭＳ）に螺合し、ロックボルト保持用治具（２０）の本体部（２０Ａ）の雌ネジ（ＦＳ）をロックボルト（１）の長手方向全域に形成されている雄ネジ（ＭＳ）と螺合してロックボルト（１）の地上側先端よりも地中側の位置に固定するに際しては、ロックボルト（１）の軸方向位置についてロックボルト保持用治具（２０）を固定用ナット（４）に隣接して固定し、
ロックボルト保持用治具（１０）の半径方向外方に設けられた補強部材固定具（４０Ｃ）の挿入部（４０ＣＢ）から補強部材固定具（４０Ｃ）の弾性反撥力に抗して補強部材（２）を挿入し、突起部（４０ＣＣ）を通過させて本体部（４０ＣＡ）に収容して保持し、
吹付材を吹き付けて受圧板（３）を形成することを特徴とする吹付工法。 A spraying method using the lock bolt holding jig (10, 20) according to claim 1,
The female screw (FS) of the body portion (10A, 20A) of the lock bolt holding jig (10, 20) is screwed into the male screw (MS) formed in the entire region of the lock bolt (1) in the longitudinal direction. , The lock bolt (1) penetrates the main body portion (10A, 20A), and fixes the main body portion (10A, 20A) to a position on the ground side with respect to the tip on the ground side in the axial direction of the lock bolt (1),
Prior to screwing the female screw (FS) of the body portion (10A, 20A) of the lock bolt holding jig (10, 20) with the male screw (MS) of the lock bolt (1), a fixing nut ( 4) is screwed onto the male screw (MS) of the lock bolt (1), and the female screw (FS) of the main body portion (20A) of the lock bolt holding jig (20) is moved over the entire length of the lock bolt (1). screwed with the male thread (MS) formed in and upon securing the position of the ground side from the ground side tip of the lock bolt (1), the locking bolt holding the axial position of the lock bolt (1) use jig (20) adjacent and fixed to the locking nut (4),
From the insertion portion (40CB) of the reinforcing member fixing tool (40C) provided radially outward of the lock bolt holding jig (10), the reinforcing member (40C) is resisted against the elastic repulsive force of the reinforcing member fixing tool (40C). 2) is inserted, the protrusion (40CC) is passed through, and the main body (40CA) is accommodated and held,
A spraying method characterized by forming a pressure receiving plate (3) by spraying a spraying material.
JP2019120740A 2019-06-28 2019-06-28 Lock bolt holding jig and spraying method using the same Active JP6745573B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019120740A JP6745573B2 (en) 2019-06-28 2019-06-28 Lock bolt holding jig and spraying method using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019120740A JP6745573B2 (en) 2019-06-28 2019-06-28 Lock bolt holding jig and spraying method using the same

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2016000867A Division JP6556061B2 (en) 2016-01-06 2016-01-06 Reinforcing member holding jig and spraying method using the same

Publications (2)

Publication Number Publication Date
JP2019157625A JP2019157625A (en) 2019-09-19
JP6745573B2 true JP6745573B2 (en) 2020-08-26

Family

ID=67995944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019120740A Active JP6745573B2 (en) 2019-06-28 2019-06-28 Lock bolt holding jig and spraying method using the same

Country Status (1)

Country Link
JP (1) JP6745573B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102147059B1 (en) * 2019-10-31 2020-08-24 (주)한국락웍기술 Steel structure supporting assembly and breast wall construction method using thereof

Also Published As

Publication number Publication date
JP2019157625A (en) 2019-09-19

Similar Documents

Publication Publication Date Title
KR100675985B1 (en) A bracing for reinforcing support
SG192085A1 (en) Bollards
KR200390920Y1 (en) Slanting steel member and supporting assembly including the same
JP6745573B2 (en) Lock bolt holding jig and spraying method using the same
JP2023174870A (en) road structure
KR101930929B1 (en) Pillar member for c.i.p. retaining wall
JP6861472B2 (en) Joint structure of precast members
JP6532906B2 (en) Installation structure of precast wall column
KR20050073776A (en) Assembly pile for method of ground improvement
KR101727206B1 (en) The smart front end cap for adjusting phc file length and the method using thereof
JP6556061B2 (en) Reinforcing member holding jig and spraying method using the same
KR20190137432A (en) Soil retaining wall for phc pile
KR20190077888A (en) Composite phc pile for soil retaining wall
KR200378292Y1 (en) Strengthened Implement of Tension type Soil Nail
JP2005076274A (en) Divided earth retaining frame
KR102107793B1 (en) Apparatus for fixing reinforced retainaing wall block
JP3578210B2 (en) Underground wall structure
JP7009889B2 (en) Ground improvement body and construction method of ground improvement body
KR200436405Y1 (en) Structure for constructing bracing for reinforcing support
KR20090055731A (en) The connectors for steel pile head embedded inconcrete footing with double cap and thereof structure
JP6022729B1 (en) Cut beam support and bridge pier reinforcement method using it
JPH08218376A (en) Bearing device of earth retaining wall
JP6470699B2 (en) Pile connection structure
JPH09329113A (en) Turnbuckle type connecting tool
KR20190137456A (en) Soil retaining wall using phc pile

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190628

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20200521

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200713

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: 20200803

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200803

R150 Certificate of patent or registration of utility model

Ref document number: 6745573

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250