JP2001172965A - Reinforcing method for rock bolt - Google Patents
Reinforcing method for rock boltInfo
- Publication number
- JP2001172965A JP2001172965A JP35440399A JP35440399A JP2001172965A JP 2001172965 A JP2001172965 A JP 2001172965A JP 35440399 A JP35440399 A JP 35440399A JP 35440399 A JP35440399 A JP 35440399A JP 2001172965 A JP2001172965 A JP 2001172965A
- Authority
- JP
- Japan
- Prior art keywords
- washer
- lock bolt
- bolt
- elastic ring
- mortar
- 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.)
- Granted
Links
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、例えば法面安定
工法等に用いられるロックボルトの補強方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reinforcing a lock bolt used in, for example, a slope stabilization method.
【０００２】[0002]
【従来の技術】法面安定工法等に用いられるロックボル
トの補強方法として、出願人は先に特開平１１−３６２
９８号を提案した。このものは、地山に削孔した孔に挿
入されたロックボルトと孔との間にグラウト材を充填
し、ロックボルトには孔内の所定位置まで補強部材を設
け、ロックボルトの地山から突出する先端部に引っ張り
部材取付具の抜けを規制する押え治具を挿入し、引っ張
り部材取付具にワイヤーロープを取り付けるものであ
る。2. Description of the Related Art As a method of reinforcing a lock bolt used in a slope stabilization method or the like, the applicant has previously disclosed Japanese Patent Application Laid-Open No. H11-362.
No. 98 was proposed. This thing fills a grout material between the lock bolt and the hole inserted into the hole drilled in the ground, provides a reinforcing member to the lock bolt to a predetermined position in the hole, and removes the rock bolt from the ground. A holding jig for restricting the pulling member mounting member from coming off is inserted into the protruding tip portion, and a wire rope is mounted on the pulling member mounting member.
【０００３】[0003]
【発明が解決しようとする課題】このようなロックボル
トの補強では、ワイヤーロープが常に真横に張られる状
態であれば問題は無いが、地山には不陸があり必ずしも
ロックボルトの挿入方向とワイヤーロープの向きが真横
とはならないので、引っ張り部材取付具のうちＵボルト
が曲げられて取り付けられることもあり、Ｕボルトは引
張荷重では十分な耐力を有するが、曲げ引張となると耐
力が減少し、太いもの若しくは強い材料を使用するなど
のロックボルトと同じ問題が生じていた。There is no problem in reinforcing such a lock bolt as long as the wire rope is always stretched right beside it. However, the ground has irregularities and the insertion direction of the lock bolt is not always required. Since the direction of the wire rope is not the sideways direction, the U-bolt of the tension member fitting may be attached by being bent, and the U-bolt has sufficient strength under tensile load, but the strength decreases with bending tension. However, the same problem as that of a lock bolt such as using a thick or strong material has occurred.
【０００４】また、地山と座金の下部とに空間がある
と、補強パイプ付きロックボルトであっても、補強パイ
プとともにロックボルトが曲げ変形し、剪断耐力と比較
して、著しく強度低下が認められるので、座金の下部に
モルタルを充填して補強するが、グラウト材により補強
パイプとともに座金も固定されてしまうので、座金下部
のモルタルの充填に問題があった。Further, if there is a space between the ground and the lower part of the washer, even with a lock bolt having a reinforcing pipe, the rock bolt is bent and deformed together with the reinforcing pipe, and the strength is remarkably reduced as compared with the shear strength. Therefore, the mortar is filled in the lower part of the washer and reinforced, but the washer is fixed together with the reinforcing pipe by the grout material, so that there is a problem in filling the mortar under the washer.
【０００５】この発明は、かかる点に鑑みてなされたも
ので、前記問題点を克服し、かつ簡易的にロックボルト
を補強することができるロックボルトの補強方法を提供
することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lock bolt reinforcing method capable of overcoming the above-mentioned problems and easily reinforcing the lock bolt.
【０００６】[0006]
【課題を解決するための手段】前記課題を解決し、かつ
目的を達成するために、この発明は、以下のように構成
した。Means for Solving the Problems In order to solve the above problems and achieve the object, the present invention has the following constitution.
【０００７】請求項１に記載の発明は、『地山を削孔し
てグラウト材を充填し、このグラウト材が充填された削
孔にロックボルトを挿入し、このロックボルトの上部に
座金を挿入し、さらに弾性体リングを装着した補強パイ
プを前記ロックボルトの上部から挿入し、前記グラウト
材が硬化した後、前記弾性体リングと前記座金を外し、
地山のロックボルト孔口の周囲をモルタルで少なくとも
座金の大きさの範囲を平らにし、このモルタルの上に再
度座金と弾性体リングとを順に位置するように補強パイ
プに装着し、さらに前記弾性体リングの上部にＵボルト
取付金具をワイヤーロープ方向に向きを合わせセット
し、押さえ具を嵌め込み締付手段を前記ロックボルトの
上部に縲着して締付固定したことを特徴とするロックボ
ルトの補強方法。』である。[0007] The invention according to claim 1 is that "the ground is drilled and filled with a grout material, a lock bolt is inserted into the drilled hole filled with the grout material, and a washer is provided above the lock bolt. Insert, further insert a reinforcing pipe with an elastic ring attached from the top of the lock bolt, after the grout material is cured, remove the elastic ring and the washer,
At least the area of the size of the washer is flattened with mortar around the rock bolt hole of the ground, and a washer and an elastic ring are mounted on the mortar again on the reinforcing pipe so as to be positioned in order, and A U-bolt mounting bracket oriented in the direction of the wire rope and set on the upper part of the body ring, a retainer is fitted, and a fastening means is fastened to the upper part of the lock bolt by tightening and fixing. Reinforcement method. ].
【０００８】この請求項１に記載の発明によれば、他穿
孔のロックボルトを用いてグラウト材が硬化した後、補
強パイプを保持する弾性体リングと座金を外し、地山の
ロックボルト孔口の周囲をモルタルで少なくとも座金の
大きさの範囲を平らにし、このモルタルの上に再度座金
が位置するように補強パイプに装着し、地山と座金との
空間にモルタルを完全に充填できるようになったので、
座金に加わる圧縮力を地山へ逃せられ、座金が地山より
浮いた状態時の座金のみの耐力から、地山への圧縮応力
の分散により座金の見掛けの耐力が向上した結果、ロッ
クボルトの曲げ耐力が向上する。According to the first aspect of the present invention, after the grout material is hardened using the lock bolt of another drilling, the elastic ring and the washer that hold the reinforcing pipe are removed, and the rock bolt hole of the ground is removed. The area around the washer is flattened with mortar at least in the size range of the washer, and it is attached to the reinforcing pipe so that the washer is located again on this mortar, so that the space between the ground and the washer can be completely filled with mortar. Has become
The compression force applied to the washer can be released to the ground, and the apparent strength of the washer has been improved by dispersing the compressive stress on the ground from the strength of only the washer when the washer is floating above the ground, resulting in the lock bolt Bending strength is improved.
【０００９】また、座金の上部にＵボルト取付金具をワ
イヤーロープ方向に向きを合わせセットすることで、Ｕ
ボルト取付金具の向きをワイヤーロープと直線上に配置
でき、引張部材取付具には曲げ力が働かず、安定した耐
力を保持することができる。[0009] Further, by setting the U-bolt mounting bracket on the upper part of the washer so as to be oriented in the direction of the wire rope, the U-bolt is provided.
The direction of the bolt mounting bracket can be arranged on a straight line with the wire rope, and no bending force acts on the tensile member mounting bracket, so that stable tensile strength can be maintained.
【００１０】請求項２に記載の発明は、『地山をロック
ボルトにより削孔し、このロックボルトの中央孔からグ
ラウト材を充填し、前記ロックボルトの上部に座金を挿
入し、さらに弾性体リングを装着した補強パイプを前記
ロックボルトの上部から挿入し、前記グラウト材が硬化
した後、前記弾性体リングと前記座金を外し、地山のロ
ックボルト孔口の周囲をモルタルで少なくとも座金の大
きさの範囲を平らにし、このモルタルの上に再度座金と
弾性体リングとを順に位置するように補強パイプに装着
し、さらに前記弾性体リングの上部にＵボルト取付金具
をワイヤーロープ方向に向きを合わせセットし、押さえ
具を嵌め込み締付手段を前記ロックボルトの上部に縲着
して締付固定したことを特徴とするロックボルトの補強
方法。』である。According to a second aspect of the present invention, there is provided a method for drilling a ground with a lock bolt, filling a grout material from a center hole of the lock bolt, inserting a washer into an upper portion of the lock bolt, and further comprising an elastic body. After the reinforcing pipe with the ring attached is inserted from above the lock bolt, and the grout material is hardened, the elastic ring and the washer are removed, and at least the size of the washer around the rock bolt hole of the ground is mortar. After flattening the area, the washer and the elastic ring are attached to the reinforcing pipe so that the washer and the elastic ring are sequentially positioned on the mortar, and the U-bolt mounting bracket is oriented on the upper part of the elastic ring in the direction of the wire rope. A method of reinforcing a lock bolt, comprising setting and setting, fitting a holding member, and attaching and tightening a fastening means on an upper portion of the lock bolt. ].
【００１１】この請求項２に記載の発明によれば、自穿
孔のロックボルトを用いてグラウト材が硬化した後、補
強パイプを保持する弾性体リングと座金を外し、地山の
ロックボルト孔口の周囲をモルタルで少なくとも座金の
大きさの範囲を平らにし、このモルタルの上に再度座金
が位置するように補強パイプに装着し、地山と座金との
空間にモルタルを完全に充填できるようになったので、
座金に加わる圧縮力を地山へ逃せられ、座金が地山より
浮いた状態時の座金のみの耐力から、地山への圧縮応力
の分散により座金の見掛けの耐力が向上した結果、ロッ
クボルトの曲げ耐力が向上する。According to the second aspect of the present invention, after the grout material is hardened using the self-drilling lock bolt, the elastic ring and the washer that hold the reinforcing pipe are removed, and the rock bolt hole of the ground is removed. The area around the washer is flattened with mortar at least in the size range of the washer, and it is attached to the reinforcing pipe so that the washer is located again on this mortar, so that the space between the ground and the washer can be completely filled with mortar. Has become
The compression force applied to the washer can be released to the ground, and the apparent strength of the washer has been improved by dispersing the compressive stress on the ground from the strength of only the washer when the washer is floating above the ground, resulting in the lock bolt Bending strength is improved.
【００１２】また、座金の上部にＵボルト取付金具をワ
イヤーロープ方向に向きを合わせセットすることで、Ｕ
ボルト取付金具の向きをワイヤーロープと直線上に配置
でき、引張部材取付具には曲げ力が働かず、安定した耐
力を保持することができる。[0012] Further, by setting a U-bolt mounting bracket in the direction of the wire rope on the upper part of the washer, the U-bolt is mounted.
The direction of the bolt mounting bracket can be arranged on a straight line with the wire rope, and no bending force acts on the tensile member mounting bracket, so that stable tensile strength can be maintained.
【００１３】[0013]
【発明の実施の形態】以下、この発明のロックボルトの
補強方法の実施の形態を図面に基づいて説明する。ま
ず、他穿孔のロックボルトの補強方法の実施の形態を図
１に示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for reinforcing a lock bolt according to the present invention will be described below with reference to the drawings. First, FIG. 1 shows an embodiment of a method for reinforcing a lock bolt having another hole.
【００１４】地山１を削孔２し、この削孔２にグラウト
材３を充填する（図１（ａ））。このグラウト材３が充
填された削孔２にロックボルト４を挿入する（図１
（ｂ））。座金５の上部に弾性体リング６を装着した補
強パイプ７をロックボルト４の上部より挿入する（図１
（ｃ））。その後、グラウト材３の硬化を待ち、グラウ
ト材３が硬化した後、補強パイプ７の上部から弾性体リ
ング６と座金５を外し、地山１のロックボルト孔口１ａ
の周囲をモルタル８で少なくとも座金５の大きさの範囲
を平らにする（図１（ｄ））。The ground 1 is bored 2 and the grout 2 is filled into the bore 2 (FIG. 1 (a)). The lock bolt 4 is inserted into the hole 2 filled with the grout material 3 (FIG. 1).
(B)). A reinforcing pipe 7 having an elastic ring 6 mounted thereon is inserted from above the lock bolt 4 (FIG. 1).
(C)). Thereafter, the hardening of the grout material 3 is waited, and after the grout material 3 has hardened, the elastic body ring 6 and the washer 5 are removed from the upper part of the reinforcing pipe 7, and the lock bolt hole 1a of the ground 1 is removed.
Is flattened with a mortar 8 at least in the size range of the washer 5 (FIG. 1D).
【００１５】その後、モルタル８の上に再度座金５と弾
性体リング６とを順に位置するように補強パイプ７に装
着し、Ｕボルト取付金具９をワイヤーロープ方向に向き
を合わせてセットし、押さえ具１０を嵌め込み、締付手
段１１をロックボルト４の上部に螺合し締付固定する
（図１（ｅ））。これでロックボルト４の打設が完了
し、互いのロックボルト４に引張部材取付具１２を用い
てワイヤーロープを張接してロックネットが完成する。After that, the washer 5 and the elastic ring 6 are mounted on the mortar 8 again to the reinforcing pipe 7 so that the washer 5 and the elastic ring 6 are located in this order. The U-bolt mounting bracket 9 is set in the direction of the wire rope and set. The tool 10 is fitted, and the fastening means 11 is screwed into the upper part of the lock bolt 4 to be fastened and fixed (FIG. 1 (e)). With this, the installation of the lock bolts 4 is completed, and the wire rope is tensioned to the lock bolts 4 by using the tension member fittings 12 to complete the lock net.
【００１６】図２はロックボルトの打設が完了したこと
を示す図、図３は補強パイプを示す図、図４は弾性体リ
ングを示す図、図５は押さえ具を示す図である。FIG. 2 is a view showing the completion of the installation of the lock bolt, FIG. 3 is a view showing the reinforcing pipe, FIG. 4 is a view showing the elastic ring, and FIG. 5 is a view showing the holding member.
【００１７】ロックボルト４に挿入可能な補強パイプ７
は、ロックボルト４より短く形成される。この補強パイ
プ７の上部に装着される弾性体リング６は、図３及び図
４に示すように、内側にテーパ面６ａを有し、このテー
パ面６ａにより小径部６ｂと大径部６ｃが形成されてい
る。弾性体リング６は、ゴムリングで構成され、大径部
６ｃ側から補強パイプ７の上部に装着され、この装着時
にテーパ面６ａにより補強パイプ７の上端開口から円滑
に小径部６ｂに挿入することができ、小径部６ｂは補強
パイプ７の外周に圧着して所定位置に確実に保持され
る。Reinforcing pipe 7 insertable into lock bolt 4
Is formed shorter than the lock bolt 4. As shown in FIGS. 3 and 4, the elastic ring 6 mounted on the upper part of the reinforcing pipe 7 has a tapered surface 6a on the inside, and the small diameter portion 6b and the large diameter portion 6c are formed by the tapered surface 6a. Have been. The elastic ring 6 is formed of a rubber ring, and is mounted on the upper portion of the reinforcing pipe 7 from the large-diameter portion 6c side. The small diameter portion 6b is pressed against the outer periphery of the reinforcing pipe 7 and is securely held at a predetermined position.
【００１８】従って、図１（ｃ）の施工時に、補強パイ
プ７に弾性体リング６を容易に装着でき、しかも補強パ
イプ７に弾性体リング６を装着した状態で、補強パイプ
７を確実に保持することができる。Therefore, the elastic pipe 6 can be easily attached to the reinforcing pipe 7 during the construction shown in FIG. 1C, and the reinforcing pipe 7 is securely held with the elastic ring 6 attached to the reinforcing pipe 7. can do.
【００１９】Ｕボルト取付金具９は、図５に示すよう
に、挿通孔９ａ１を有する金具本体９ａから一方向に延
びる取付部９ｂが形成され、この取付部９ｂに取付孔９
ｂ１が形成されている。Ｕボルト取付金具９は、図１
（ｅ）に示すように施工時、挿通孔９ａ１を補強パイプ
７に挿通して押さえ具１０を嵌め込み、締付手段１１に
より締付固定される。取付部９ｂの取付孔９ｂ１には、
引張部材取付具１２が取り付けられ、引張部材取付具１
２にワイヤーロープを張接してロックネットが完成す
る。As shown in FIG. 5, the U-bolt mounting bracket 9 is formed with a mounting portion 9b extending in one direction from a metal fitting body 9a having an insertion hole 9a1, and the mounting portion 9b is formed in the mounting portion 9b.
b1 is formed. The U-bolt mounting bracket 9 is shown in FIG.
As shown in (e), at the time of construction, the insertion hole 9a1 is inserted into the reinforcing pipe 7, the holding tool 10 is fitted, and the fixing means 11 is tightened and fixed. In the mounting hole 9b1 of the mounting portion 9b,
The tension member fixture 12 is attached, and the tension member fixture 1
A wire net is attached to 2 to complete the lock net.
【００２０】このように補強パイプ７の位置決めに弾性
体リング６を用いて座金５を固定したので、グラウト材
３による補強パイプ７の固定の後、座金５を外してから
モルタル８によるロックボルト孔口１ａの周囲の地山１
を整形できるので、モルタル８の不完全充填の排除と作
業性の向上を両立することができる。Since the washer 5 is fixed by using the elastic ring 6 for positioning the reinforcing pipe 7 in this manner, after the reinforcing pipe 7 is fixed by the grout material 3, the washer 5 is removed, and then the lock bolt hole is formed by the mortar 8. Ground 1 around mouth 1a
Therefore, it is possible to achieve both elimination of incomplete filling of the mortar 8 and improvement of workability.
【００２１】また、弾性体リング６の内側の形状は小径
部６ｂにもう一方を大径部６ｃとしたテーパ面６ａであ
り、もしくは内側の形状は球面状としてもよく、これに
より補強パイプ７ヘの挿入時の力は小さい力で入るが、
外す時には大きな力が必要となるので、補強パイプ７の
所定位置までの取付が簡便にでき、さらに削孔２に埋め
込まれているロックボルト４ヘの取付後の位置ずれが起
きにくい締め付け力となっている。The inner shape of the elastic ring 6 may be a tapered surface 6a having a small diameter portion 6b and the other large diameter portion 6c, or the inner shape may be a spherical shape. Although the force at the time of insertion is small,
Since a large force is required when removing the reinforcing pipe 7, the reinforcing pipe 7 can be easily mounted to a predetermined position, and the tightening force is less likely to be displaced after mounting on the lock bolt 4 embedded in the drilled hole 2. ing.
【００２２】また、座金５とＵボルト取付金具９の間に
弾性体リング６を介したので、締付手段１１のロックボ
ルト用ナットの締め付けで弾性体リング６が撓み、締付
手段１１の弛み止めの作用も生じる。Since the elastic ring 6 is interposed between the washer 5 and the U-bolt mounting bracket 9, the elastic ring 6 is bent by tightening the lock bolt nut of the tightening means 11, and the tightening means 11 is loosened. A stopping effect also occurs.
【００２３】また、Ｕボルト取付金具９を用い、Ｕボル
ト取付金具９に引張部材取付具１２を取り付けたから、
地山１の不陸に拘らず、引張部材取付具１２には曲げ力
が働かず、安定した耐力を保持することができる。Further, since the tension member mounting member 12 is attached to the U bolt mounting member 9 by using the U bolt mounting member 9,
Regardless of the unevenness of the ground 1, no bending force acts on the tension member fixture 12, and stable tensile strength can be maintained.
【００２４】また、地山１と座金５との空間にモルタル
８を完全に充填できるようになったので、座金５に加わ
る圧縮力を地山１へ逃すことができ、座金５が地山１よ
り浮いた状態時の座金５のみの耐力から、地山１への圧
縮応力の分散により座金５の見掛けの耐力が向上し、そ
の結果、補強パイプ７を有するロックボルト４の曲げ耐
力が向上する。Further, since the space between the ground 1 and the washer 5 can be completely filled with the mortar 8, the compressive force applied to the washer 5 can be released to the ground 1 and the washer 5 is moved to the ground 1 From the proof strength of only the washer 5 in the more floating state, the apparent proof strength of the washer 5 is improved by dispersing the compressive stress to the ground 1, and as a result, the bending proof strength of the lock bolt 4 having the reinforcing pipe 7 is improved. .
【００２５】次に、自穿孔のロックボルトの補強方法の
実施の形態を図６に示す。Next, an embodiment of a method for reinforcing a self-drilling lock bolt is shown in FIG.
【００２６】自穿孔のロックボルト４の先端には穿孔爪
４ａが設けられ、このロックボルト４の穿孔爪４ａによ
り地山１を削孔２する（図６（ａ））。この削孔２にロ
ックボルト４の軸方向に形成された中央孔４ｂからグラ
ウト材３を充填する（図６（ｂ））。このロックボルト
４の上部に座金５を挿入し、弾性体リング６を装着した
補強パイプ７をロックボルト４の上部より挿入する（図
６（ｃ））。その後、グラウト材３の硬化を待ち、グラ
ウト材３が硬化した後、補強パイプ７の上部から弾性体
リング６と座金５を外し、地山１のロックボルト孔口１
ａの周囲をモルタル８で少なくとも座金５の大きさの範
囲を平らにする（図６（ｄ））。A self-drilling lock bolt 4 is provided at the tip with a drilling claw 4a, and the ground 1 is drilled 2 by the drilling claw 4a of the lock bolt 4 (FIG. 6 (a)). The grout material 3 is filled into the hole 2 through a central hole 4b formed in the axial direction of the lock bolt 4 (FIG. 6B). The washer 5 is inserted into the upper part of the lock bolt 4, and the reinforcing pipe 7 to which the elastic ring 6 is attached is inserted from the upper part of the lock bolt 4 (FIG. 6C). Thereafter, the hardening of the grout material 3 is waited. After the grout material 3 is hardened, the elastic ring 6 and the washer 5 are removed from the upper part of the reinforcing pipe 7, and the lock bolt hole 1 of the ground 1 is removed.
The area around a is flattened with a mortar 8 at least in the size range of the washer 5 (FIG. 6D).
【００２７】その後、モルタル８の上に再度座金５と弾
性体リング６とを順に位置するように補強パイプ７に装
着し、Ｕボルト取付金具９をワイヤーロープ方向に向き
を合わせてセットし、押さえ具１０を嵌め込み、締付手
段１１をロックボルト４の上部に螺合し締付固定する
（図６（ｅ））。これでロックボルト４の打設が完了
し、互いのロックボルト４に引張部材取付具１２を用い
てワイヤーロープを張接してロックネットが完成する。After that, the washer 5 and the elastic ring 6 are mounted on the reinforcing pipe 7 so that the washer 5 and the elastic ring 6 are sequentially positioned on the mortar 8, and the U-bolt mounting bracket 9 is set in the direction of the wire rope and set. The tool 10 is fitted, and the fastening means 11 is screwed into the upper part of the lock bolt 4 to be fastened and fixed (FIG. 6 (e)). With this, the installation of the lock bolts 4 is completed, and the wire rope is tensioned to the lock bolts 4 by using the tension member fittings 12 to complete the lock net.
【００２８】[0028]
【発明の効果】前記したように、請求項１に記載の発明
では、他穿孔のロックボルトを用いてグラウト材が硬化
した後、補強パイプを保持する弾性体リングと座金を外
し、地山のロックボルト孔口の周囲をモルタルで少なく
とも座金の大きさの範囲を平らにし、このモルタルの上
に再度座金が位置するように補強パイプに装着し、地山
と座金との空間にモルタルを完全に充填できるようにな
ったので、座金に加わる圧縮力を地山へ逃せられ、座金
が地山より浮いた状態時の座金のみの耐力から、地山へ
の圧縮応力の分散により座金の見掛けの耐力が向上した
結果、ロックボルトの曲げ耐力が向上する。As described above, according to the first aspect of the present invention, after the grout material is hardened using the lock bolt of another drilling, the elastic ring holding the reinforcing pipe and the washer are removed to remove the ground. Flatten at least the size range of the washer with mortar around the hole of the lock bolt hole, attach it to the reinforcing pipe so that the washer is located again on this mortar, and completely put the mortar in the space between the ground and the washer Filling allows the compression force applied to the washer to escape to the ground, and the apparent strength of the washer due to dispersion of the compressive stress on the ground from the strength of only the washer when the washer is floating above the ground. As a result, the bending strength of the lock bolt is improved.
【００２９】また、座金の上部にＵボルト取付金具をワ
イヤーロープ方向に向きを合わせセットすることで、Ｕ
ボルト取付金具の向きをワイヤーロープと直線上に配置
でき、引張部材取付具には曲げ力が働かず、安定した耐
力を保持することができる。The U-bolt mounting bracket is set on the upper part of the washer so as to face in the direction of the wire rope.
The direction of the bolt mounting bracket can be arranged on a straight line with the wire rope, and no bending force acts on the tensile member mounting bracket, so that stable tensile strength can be maintained.
【００３０】請求項２に記載の発明では、自穿孔のロッ
クボルトを用いてグラウト材が硬化した後、補強パイプ
を保持する弾性体リングと座金を外し、地山のロックボ
ルト孔口の周囲をモルタルで少なくとも座金の大きさの
範囲を平らにし、このモルタルの上に再度座金が位置す
るように補強パイプに装着し、地山と座金との空間にモ
ルタルを完全に充填できるようになったので、座金に加
わる圧縮力を地山へ逃せられ、座金が地山より浮いた状
態時の座金のみの耐力から、地山への圧縮応力の分散に
より座金の見掛けの耐力が向上した結果、ロックボルト
の曲げ耐力が向上する。According to the second aspect of the present invention, after the grout material is hardened using the self-drilling lock bolt, the elastic ring and the washer that hold the reinforcing pipe are removed, and the periphery of the rock bolt hole in the ground is removed. As the mortar flattened at least the size range of the washer, it was attached to the reinforcing pipe so that the washer was located again on this mortar, so that the space between the ground and the washer could be completely filled with mortar , The compression force applied to the washer can be released to the ground, and the apparent strength of the washer has been improved by dispersing the compressive stress on the ground from the strength of the washer alone when the washer is floating above the ground, resulting in a lock bolt. The bending proof stress is improved.
【００３１】また、座金の上部にＵボルト取付金具をワ
イヤーロープ方向に向きを合わせセットすることで、Ｕ
ボルト取付金具の向きをワイヤーロープと直線上に配置
でき、引張部材取付具には曲げ力が働かず、安定した耐
力を保持することができる。The U-bolt mounting bracket is set on the upper part of the washer so as to be oriented in the direction of the wire rope.
The direction of the bolt mounting bracket can be arranged on a straight line with the wire rope, and no bending force acts on the tensile member mounting bracket, so that stable tensile strength can be maintained.
【図１】他穿孔のロックボルトの補強方法の実施の形態
を示す図である。FIG. 1 is a view showing an embodiment of a method for reinforcing a lock bolt having another hole.
【図２】ロックボルトの打設が完了したことを示す図で
ある。FIG. 2 is a view showing that the installation of a lock bolt is completed.
【図３】補強パイプを示す図である。FIG. 3 is a view showing a reinforcing pipe.
【図４】弾性体リングを示す図である。FIG. 4 is a view showing an elastic ring.
【図５】押さえ具を示す図である。FIG. 5 is a view showing a holding member.
【図６】自穿孔のロックボルトの補強方法の実施の形態
を示す図である。FIG. 6 is a diagram showing an embodiment of a method for reinforcing a self-drilling lock bolt.
１ 地山 ２ 削孔 ３ グラウト材 ４ ロックボルト ５ 座金 ６ 弾性体リング ７ 補強パイプ ８ モルタル ９ Ｕボルト取付金具 １０ 押さえ具 DESCRIPTION OF SYMBOLS 1 Ground 2 Drilling hole 3 Grout material 4 Lock bolt 5 Washer 6 Elastic ring 7 Reinforcement pipe 8 Mortar 9 U bolt mounting bracket 10 Holder
Claims (2)
グラウト材が充填された削孔にロックボルトを挿入し、
このロックボルトの上部に座金を挿入し、さらに弾性体
リングを装着した補強パイプを前記ロックボルトの上部
から挿入し、前記グラウト材が硬化した後、前記弾性体
リングと前記座金を外し、地山のロックボルト孔口の周
囲をモルタルで少なくとも座金の大きさの範囲を平らに
し、このモルタルの上に再度座金と弾性体リングとを順
に位置するように補強パイプに装着し、さらに前記弾性
体リングの上部にＵボルト取付金具をワイヤーロープ方
向に向きを合わせセットし、押さえ具を嵌め込み締付手
段を前記ロックボルトの上部に縲着して締付固定したこ
とを特徴とするロックボルトの補強方法。1. A ground is drilled and filled with a grout material, and a rock bolt is inserted into the drilled hole filled with the grout material.
A washer is inserted into the upper portion of the lock bolt, and a reinforcing pipe having an elastic ring attached thereto is inserted from the upper portion of the lock bolt. After the grout material is hardened, the elastic ring and the washer are removed. At least the area of the size of the washer is flattened with a mortar around the hole of the lock bolt hole, and a washer and an elastic ring are mounted on the reinforcing pipe so that the washer and the elastic ring are positioned in this order on the mortar. A method for reinforcing a lock bolt, comprising setting a U-bolt mounting bracket in the direction of the wire rope on the upper part of the lock bolt, fitting a retainer, fastening a fastening means on the upper part of the lock bolt, and tightening and fixing. .
ックボルトの中央孔からグラウト材を充填し、前記ロッ
クボルトの上部に座金を挿入し、さらに弾性体リングを
装着した補強パイプを前記ロックボルトの上部から挿入
し、前記グラウト材が硬化した後、前記弾性体リングと
前記座金を外し、地山のロックボルト孔口の周囲をモル
タルで少なくとも座金の大きさの範囲を平らにし、この
モルタルの上に再度座金と弾性体リングとを順に位置す
るように補強パイプに装着し、さらに前記弾性体リング
の上部にＵボルト取付金具をワイヤーロープ方向に向き
を合わせセットし、押さえ具を嵌め込み締付手段を前記
ロックボルトの上部に縲着して締付固定したことを特徴
とするロックボルトの補強方法。2. A ground pipe is drilled with a lock bolt, a grout material is filled through a central hole of the lock bolt, a washer is inserted into an upper portion of the lock bolt, and a reinforcing pipe having an elastic ring attached thereto is formed. After the rock bolt is inserted from above and the grout material is hardened, the elastic ring and the washer are removed, and the area around the rock bolt hole of the ground is flattened with mortar to at least the size range of the washer. Attach the washer and the elastic ring to the reinforcing pipe so that they are located in this order on the mortar, and further set the U-bolt mounting bracket on the upper part of the elastic body ring in the direction of the wire rope, and insert the retainer. A method for reinforcing a lock bolt, wherein a fastening means is attached to an upper portion of the lock bolt and fastened and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35440399A JP4229253B2 (en) | 1999-12-14 | 1999-12-14 | Lock bolt reinforcement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35440399A JP4229253B2 (en) | 1999-12-14 | 1999-12-14 | Lock bolt reinforcement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001172965A true JP2001172965A (en) | 2001-06-26 |
| JP4229253B2 JP4229253B2 (en) | 2009-02-25 |
Family
ID=18437334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35440399A Expired - Fee Related JP4229253B2 (en) | 1999-12-14 | 1999-12-14 | Lock bolt reinforcement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4229253B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011012539A (en) * | 2009-06-03 | 2011-01-20 | Tokyo Seiko Co Ltd | Hybrid anchor and anchor method |
-
1999
- 1999-12-14 JP JP35440399A patent/JP4229253B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011012539A (en) * | 2009-06-03 | 2011-01-20 | Tokyo Seiko Co Ltd | Hybrid anchor and anchor method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4229253B2 (en) | 2009-02-25 |
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