JP2000008796A - Pipe type lock bolt - Google Patents
Pipe type lock boltInfo
- Publication number
- JP2000008796A JP2000008796A JP10172397A JP17239798A JP2000008796A JP 2000008796 A JP2000008796 A JP 2000008796A JP 10172397 A JP10172397 A JP 10172397A JP 17239798 A JP17239798 A JP 17239798A JP 2000008796 A JP2000008796 A JP 2000008796A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- lock bolt
- type lock
- ground
- expansion
- 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
- Excavating Of Shafts Or Tunnels (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、トンネル工事等に
おいて地山の崩落等を防ぐため使用するパイプ式ロック
ボルトに係わり、特にその引抜抵抗を向上させることが
できるパイプ式ロックボルトに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe-type lock bolt used for preventing collapse of ground in tunnel construction and the like, and more particularly to a pipe-type lock bolt capable of improving pull-out resistance.
【0002】[0002]
【従来の技術】山岳等のトンネル工事で一般的なナトム
工法(NATM工法)では、地山を掘削したあと(必要
な場合は壁をセメントで固めた後)、壁から岩盤内部へ
垂直に多数のロックボルトを打ち込み、セメント系或い
は樹脂系等の所定の定着材で定着させたり、パイプ式ロ
ックボルト内に圧液を注入して膨張拡径させたりして、
トンネルの内壁近くの地盤を強固にするとともに岩盤内
部の地盤で支持することで内壁周辺の崩落を防ぐように
している(支保工)。2. Description of the Related Art In the NATM method generally used for tunnel construction in mountains or the like, after excavating the ground (after hardening the wall with cement if necessary), a large number of the rocks are vertically inserted from the wall into the rock mass. And fix it with a predetermined fixing material such as cement or resin, or inject pressure liquid into the pipe type lock bolt to expand and expand the diameter.
The ground near the inner wall of the tunnel is strengthened and supported by the ground inside the rock to prevent collapse around the inner wall (support).
【0003】図11は上記圧液を注入して膨張拡径する
パイプ式ロックボルトの製造方法の説明である。鋼管本
体61を半径方向に押し潰し二重にするとともに、両脇
を丸めて二重管62を作る(図11の(1)〜
(3))。そして、手元側端部である左側端部に補強用
の円筒のスリーブ63を嵌め、端面を溶接し(図11の
(4)、(5))、スリーブ63の側面所定箇所から中
心方向へ二重管62の2つの管壁の間まで貫通する小孔
を穿設し、圧液(圧水等)の注入孔64とする(図11
の(5))。二重管62の先端部にも補強用のスリーブ
65を嵌め、先端にコーン66を溶接することで図12
に示す如きパイプ式ロックボルト67が完成する。パイ
プ式ロックボルト67のスリーブ63の部分の断面を図
13に示す。FIG. 11 illustrates a method of manufacturing a pipe-type lock bolt which expands and expands the diameter by injecting the above-mentioned pressure liquid. The steel pipe body 61 is crushed in the radial direction to be doubled, and both sides are rounded to form a double pipe 62 ((1) to (1) in FIG. 11).
(3)). Then, a cylindrical sleeve 63 for reinforcement is fitted to the left end, which is the proximal end, and the end surface is welded ((4), (5) in FIG. 11). A small hole that penetrates between the two pipe walls of the heavy pipe 62 is formed as an injection hole 64 for pressurized liquid (pressured water or the like) (FIG. 11).
(5)). A reinforcing sleeve 65 is also fitted to the distal end of the double pipe 62, and a cone 66 is welded to the distal end.
The pipe type lock bolt 67 as shown in FIG. FIG. 13 shows a cross section of the sleeve 63 of the pipe-type lock bolt 67.
【0004】図14はパイプ式ロックボルト67の使用
方法を示す説明図である。予め、トンネルの内壁68か
ら垂直に地山69の内部に向けてボアホール70を穿孔
しておく(図14の(1)参照)。パイプ式ロックボル
ト67をボアホール70に打設する場合、ロックボルト
打設用アダプタ81を用いる。すなわち、ロックボルト
打設用アダプタ81を打ち込み機(図示せず)のシャッ
クロッドに結合し、該打ち込み機を稼働し、スリーブ6
3位置にベアリングプレート83嵌め込んだパイプ式ロ
ックボルト67を、コーン66からボアホール70の中
に打設する(図14の(2)参照)。打設が終わったな
らば、ロックボルト打設用アダプタ81を外し、スリー
ブ63に圧液注入用アダプタ82を所定箇所まで嵌める
(図14の(3)参照)。すなわち、パイプ式ロックボ
ルト67の手元側端部に圧液注入用アダプタ82を嵌
め、スリーブ63に形成した注入孔64と圧液注入用ア
ダプタ82の注入穴82aを連通し、注入孔82aの入
口から圧水等の圧液を注入する。これにより圧液は注入
孔82a、注入孔64を通ってパイプ式ロックボルト6
7の内部に入り、高圧によりパイプ式ロックボルト67
の二重管62を膨張拡径する。この結果、パイプ式ロッ
クボルト67はボアホール70の周囲の地山と定着し、
直ちにトンネルの内壁近くの地盤を強固にするとともに
岩盤内部の地盤を支持することで内壁周辺の崩落を防ぐ
ことができる。圧液の注入で定着し終わったならば、圧
液注入用アダプタ82を外すと、パイプ式ロックボルト
67の内部の液が抜ける。そして、必要であればパイプ
式ロックボルト67の内部に適宜の注入材を注入する。
(図14(4)参照)。かかるパイプ式ロックボルトに
よれば、素早く、簡単な取り付け作業で二重管すなわち
ボルト67が放射方向に膨張拡径して周囲地山の岩盤、
地盤、土壌を瞬時に締め付ける。たとえば、図15
(a)に示すように細かくひびの入っている岩盤にパイ
プ式ロックボルト67を取り付けると、ロックボルトの
周りの岩盤の塊と塊の間の接触力を放射状の圧力が強
め、岩盤強度を高める。又、図15(b)に示すよう
に、土壌にパイプ式ロックボルト67を取り付けると、
ロックボルトの周りの土壌を瞬時に固め、土壌の強度を
高めてロックボルトの固定能力を増大する。又、パイプ
式ロックボルト67は、図16(a)に示すように、二
重管の膨張の最終段階において長さLが軸方向にL′ま
で縮む。これにより、図16(b)に示すように地山6
9の圧密領域69aの岩盤、地盤を軸方向に圧密するこ
とができる。FIG. 14 is an explanatory view showing how to use the pipe-type lock bolt 67. A borehole 70 is drilled in advance from the inner wall 68 of the tunnel to the inside of the ground 69 vertically (see (1) in FIG. 14). When the pipe-type lock bolt 67 is driven into the borehole 70, a lock bolt driving adapter 81 is used. That is, the lock bolt driving adapter 81 is connected to a shack rod of a driving machine (not shown), the driving machine is operated, and the sleeve 6 is driven.
The pipe-type lock bolt 67 fitted in the bearing plate 83 at the three positions is driven from the cone 66 into the borehole 70 (see (2) in FIG. 14). When the driving is completed, the lock bolt driving adapter 81 is removed, and the pressure liquid injection adapter 82 is fitted to the sleeve 63 to a predetermined position (see (3) in FIG. 14). That is, the pressure liquid injection adapter 82 is fitted to the proximal end of the pipe-type lock bolt 67, and the injection hole 64 formed in the sleeve 63 communicates with the injection hole 82 a of the pressure liquid injection adapter 82. And pressurized liquid such as pressurized water. As a result, the pressurized liquid passes through the injection hole 82a and the injection hole 64,
7 and the pipe type lock bolt 67
Is expanded and expanded. As a result, the pipe-type lock bolt 67 is fixed to the ground around the borehole 70,
Immediately strengthening the ground near the inner wall of the tunnel and supporting the ground inside the bedrock can prevent the collapse around the inner wall. When the fixing is completed by injecting the pressurized liquid, the adapter 82 for injecting the pressurized liquid is removed, and the liquid inside the pipe-type lock bolt 67 is drained. Then, if necessary, an appropriate injection material is injected into the pipe-type lock bolt 67.
(See FIG. 14 (4)). According to such a pipe-type lock bolt, the double pipe or the bolt 67 expands and expands radially in a quick and simple mounting operation, and the rock around the surrounding ground is
Instantly tighten the ground and soil. For example, FIG.
When the pipe-type rock bolt 67 is attached to a finely cracked rock as shown in FIG. 7A, the radial pressure increases the contact force between the rocks around the rock bolt, increasing the rock strength. . Also, as shown in FIG. 15 (b), when the pipe type lock bolt 67 is attached to the soil,
Immediately solidifies the soil around the rock bolt, increases the strength of the soil and increases the fixing capacity of the rock bolt. As shown in FIG. 16A, the length L of the pipe-type lock bolt 67 is reduced to L 'in the axial direction at the final stage of expansion of the double pipe. As a result, as shown in FIG.
The rock and ground in the 9 compaction areas 69a can be compacted in the axial direction.
【0005】[0005]
【発明が解決しようとする課題】以上のように、パイプ
式ロックボルトは、折り畳まれた二重管である本体管を
地山内に打設した後、該本体管を圧液等で膨張拡径させ
るようにして周囲の地山と定着し、かつ膨張拡径による
押圧力で周囲の地山を締め付ける仕組みになっている。
ところが従来のパイプ式ロックボルトでは、引抜方向の
力(即ち地山がトンネル内空間に向けて押し出してくる
力)に対しては、膨張によって拡径した本体管と、該本
体管が接触する周囲の岩盤、地盤との間で発生する摩擦
力により抵抗するだけであった。このため、従来のパイ
プ式ロックボルトは、砂質岩盤のように柔らかい地山で
は引抜強度の面で不利であった(抜け易かった)。しか
し、このような柔らかい地山でも、施工性、地山改良効
果等の面からパイプ式ロックボルトを採用したいという
要求がある。以上から本発明の目的は、引抜抵抗の大き
なパイプ式ロックボルトを提供することである。As described above, the pipe-type lock bolt is constructed such that the main pipe, which is a folded double pipe, is cast into the ground, and then the main pipe is expanded and expanded with a pressurized liquid or the like. In this way, the ground is fixed to the surrounding ground, and the surrounding ground is tightened by the pressing force due to the expansion and expansion.
However, in the conventional pipe-type lock bolt, the main pipe expanded by the expansion and the surrounding area where the main pipe comes into contact with the pull-out direction force (that is, the force that the ground pushes out toward the space in the tunnel). It only resisted the frictional force generated between the rock and the ground. For this reason, the conventional pipe-type rock bolt was disadvantageous (easy to pull out) in terms of pull-out strength in soft ground such as sandy rock. However, even with such soft ground, there is a demand for adopting a pipe-type lock bolt in terms of workability, ground improvement effect, and the like. Accordingly, an object of the present invention is to provide a pipe-type lock bolt having a large pull-out resistance.
【0006】[0006]
【課題を解決するための手段】上記課題は本発明によれ
ば、圧液を注入されて膨張拡径自在な本体管を有し、該
本体管の一端に打設先端部材を、他端に圧液を注入する
ための注入孔を有する打設後端部材をそれぞれ設けたパ
イプ式ロックボルトにおいて、前記打設先端部材と打設
後端部材との間の本体管の外周に膨張拘束筒状部材を配
設することにより達成される。このようにすることによ
り、パイプ式ロックボルトを地山に打設設置し、本体管
内を加圧すると、本体管は膨張拘束筒状部材が配設され
ていない部位で膨張拡径し、膨張拘束筒状部材が配設さ
れている部位で膨脹拡径が拘束されて殆ど膨張拡径しな
い。この結果、本体管の外周には、膨張拡径した部位と
殆ど膨張拡径していない部位によって、軸心方向に連な
る形で凹凸が形成されることになる。このため本発明
の、パイプ式ロックボルトに軸心方向、従って引抜方向
の力が作用しても、本体管の外周の凹凸が地山にひっか
かることになり大きな引抜抵抗を発揮する。また、膨張
拘束筒状部材を本体管の外周に所定の間隔で複数個配設
する。このようにすれば、パイプ式ロックボルトの地山
に対する引抜抵抗を更に向上することができる。また、
円筒スリーブの両端を斜めにカットして膨張拘束筒状部
材を形成する。このようにすれば、膨張拡径により膨張
拘束筒状部材の一部が破断して矢尻状になって地山に食
い込むため、パイプ式ロックボルトの地山に対する引抜
抵抗を更に向上することができる。また、円筒スリーブ
の軸方向にスリットを設けて膨張拘束筒状部材を形成す
る。このようにすれば、膨張拡径により膨張拘束筒状部
材の一部、すなわち、スリット近辺が外側に地山に食い
込む形で変形し、該変形部分が地山に食い込みパイプ式
ロックボルトの地山に対する引抜抵抗を更に向上するこ
とができる。SUMMARY OF THE INVENTION According to the present invention, there is provided a main body tube which is inflated and expandable by injecting a pressurized liquid. In a pipe-type lock bolt provided with a casting rear end member having an injection hole for injecting a pressurized liquid, an expansion restraining cylindrical shape is provided on an outer periphery of a main body pipe between the casting front end member and the casting rear end member. This is achieved by disposing members. In this way, when the pipe-type lock bolt is driven into the ground and the inside of the main body pipe is pressurized, the main body pipe expands and expands at a portion where the expansion restricting tubular member is not provided, and the expansion restriction is performed. The expansion and diameter expansion is restricted at the portion where the tubular member is provided, and almost no expansion and diameter expansion occurs. As a result, irregularities are formed on the outer periphery of the main body tube in a form continuous with the axial center direction by a portion that has expanded and expanded and a portion that has hardly expanded and expanded. For this reason, even if a force in the axial direction, that is, in the pulling direction, acts on the pipe-type lock bolt of the present invention, the unevenness on the outer periphery of the main body tube is caught on the ground, and a large pulling resistance is exhibited. In addition, a plurality of expansion restricting tubular members are disposed on the outer circumference of the main body tube at predetermined intervals. By doing so, the pull-out resistance of the pipe-type lock bolt to the ground can be further improved. Also,
Both ends of the cylindrical sleeve are cut obliquely to form an expansion-constrained tubular member. According to this configuration, a part of the expansion-restraining tubular member is broken by the expansion and expansion and becomes an arrowhead shape and bites into the ground, so that the pull-out resistance of the pipe-type lock bolt against the ground can be further improved. . Further, a slit is provided in the axial direction of the cylindrical sleeve to form an expansion-constrained tubular member. With this configuration, a part of the expansion-constrained cylindrical member, that is, the vicinity of the slit is deformed so as to bite outward into the ground due to the expansion and expansion, and the deformed portion cuts into the ground and the ground of the pipe-type lock bolt. Can be further improved.
【0007】[0007]
【発明の実施の形態】図1は、本発明の第1実施例のパ
イプ式ロックボルトの斜視図、図2は図1のX1−Y1
線断面図、図3は図1のX2−Y2線断面図である。第
1実施例のパイプ式ロックボルト1は、図1に示すよう
に、従来のパイプ式ロックボルトと略同様な二重管2を
有している。即ち、この二重管2は、図2及び図3にそ
の断面を示すように、円筒状の鋼管を側方から平らに押
し潰して二重にした後、この両側部を丸めて筒状に成型
したものである。この二重管2の軸心方向(図1の矢印
A、B方向)における手元側(矢印A側)の端部外周側
には補強用スリーブ3が挿嵌されており、補強用スリー
ブ3の端部3aは二重管2の手元側端面と溶接されてい
る。補強用スリーブ3及び二重管2には、図2に示すよ
うに、該補強用スリーブ3の側面所定箇所に開口部を形
成する形で注入孔4が、該補強用スリーブ3の管壁を貫
通し、更に二重管2の2つの管壁の間まで貫通して設け
られている。一方、二重管2の先端側(矢印B側)の端
部外周側には別の補強用スリーブ5が挿嵌されており、
該補強用スリーブ5の先端にはコーン6が溶接乃至装着
されている。FIG. 1 is a perspective view of a pipe-type lock bolt according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line X1-Y1 of FIG.
FIG. 3 is a sectional view taken along line X2-Y2 of FIG. As shown in FIG. 1, the pipe-type lock bolt 1 of the first embodiment has a double pipe 2 substantially similar to a conventional pipe-type lock bolt. That is, as shown in FIGS. 2 and 3, the cross section of the double pipe 2 is obtained by crushing a cylindrical steel pipe flat from the side to form a double pipe, and then rounding both sides to form a cylindrical pipe. It is molded. A reinforcing sleeve 3 is inserted around the outer periphery of the end (arrow A side) in the axial direction (the direction of arrows A and B in FIG. 1) of the double pipe 2. The end 3 a is welded to the proximal end face of the double pipe 2. As shown in FIG. 2, an injection hole 4 is formed in the reinforcing sleeve 3 and the double pipe 2 so as to form an opening at a predetermined position on a side surface of the reinforcing sleeve 3. It penetrates and further penetrates between the two pipe walls of the double pipe 2. On the other hand, another reinforcing sleeve 5 is fitted on the outer peripheral side of the end of the double pipe 2 on the tip side (arrow B side),
A cone 6 is welded or mounted on the tip of the reinforcing sleeve 5.
【0008】更にこのパイプ式ロックボルト1は、図1
及び図3に示すように、二重管2の外周側に挿嵌された
形で円筒状の拘束パイプ7が4個設けられており(拘束
パイプ7の個数は4個に限らず1個以上であれば何個で
もよい)、これら拘束パイプ7は、上述した補強用スリ
ーブ3、5の間の位置で、しかも補強用スリーブ3、5
の間の長さを略等分(図1では5等分)する位置に配置
されている。尚、拘束パイプ7、7間や、拘束パイプ7
と補強用スリーブ3の間、拘束パイプ7と補強用スリー
ブ5の間の間隔は互いに等しくなく不均一な間隔であっ
てもよい。Further, the pipe type lock bolt 1 is shown in FIG.
As shown in FIG. 3, four cylindrical constraining pipes 7 are provided so as to be fitted on the outer peripheral side of the double pipe 2 (the number of the constraining pipes 7 is not limited to four and may be one or more. Any number of the restriction pipes may be used.
Are arranged at positions that substantially divide the length between them (in FIG. 1, equally divide by 5). In addition, between the constraining pipes 7,
The distance between the reinforcing pipe 3 and the restraining pipe 7 and the distance between the restraining pipe 7 and the reinforcing sleeve 5 may not be equal to each other and may be uneven.
【0009】図4は本発明のパイプ式ロックボルトの施
工方法説明図であり、図4(a)はパイプ式ロックボル
トを地山に取付けた状態を示す図、図4(b)はパイプ
式ロックボルトの地山への取付けが完了した状態を示し
た図である。トンネル内壁側の、砂質岩盤のような柔ら
かい地山50に対してパイプ式ロックボルト1を取付け
るには以下のように行う。まず、図示しないトンネル内
壁から地山50にパイプ式ロックボルト1を、先端のコ
ーン6を地山50内に向け、手元の補強スリーブ3側か
ら叩き込む形で打設設置する。(なお、別の方法とし
て、孔壁が自立できる程度の硬さをもつ地山であれば、
まずボアホールを穿孔した後、該ボアホール内にパイプ
式ロックボルト1を挿入する形で設置することもでき
る。パイプ式ロックボルト1の打設設置は、予めベアリ
ングプレート(図4では省略)を先端のコーン6側から
手元側の補強スリーブ3位置迄嵌め込んだ状態にして、
該ベアリングプレートとスリーブ3を地山50外に残
し、該補強スリーブ3より先端側のその他の部位が全て
地山50内に挿入される形で完了する。打設設置が完了
して図4(a)に示す状態になった後、手元側の補強ス
リーブ3に図示しない公知の圧液注入用アダプタを設置
し、注入孔4を介して圧水などの圧液を注入する。圧液
の注入により二重管2は、図4(b)に示すように所定
の部位2a(後述)において放射方向(図4(b)の矢
印C方向)に膨張拡径される。その後、圧液注入用アダ
プタを取り外すと圧液が抜ける、必要であれば二重管2
の内部に適宜な注入材を注入する。FIG. 4 is an explanatory view of a method of installing a pipe-type lock bolt of the present invention. FIG. 4 (a) shows a state in which the pipe-type lock bolt is mounted on the ground, and FIG. 4 (b) shows a pipe-type lock bolt. It is a figure showing the state where attachment of a lock bolt to the ground was completed. In order to attach the pipe-type lock bolt 1 to a soft ground 50 such as sandy rock on the inner wall side of the tunnel, the following is performed. First, the pipe-type lock bolt 1 is placed and installed from the inner wall of the tunnel (not shown) to the ground 50 by driving the cone 6 at the tip into the ground 50 and striking it from the reinforcing sleeve 3 side at hand. (Alternatively, as an alternative, if the ground has enough hardness that the hole wall can stand on its own,
First, after drilling a borehole, the pipe-type lock bolt 1 may be installed in the borehole. The installation of the pipe-type lock bolt 1 is performed in such a manner that a bearing plate (omitted in FIG. 4) is fitted in advance from the cone 6 at the tip to the reinforcing sleeve 3 at the hand side.
The bearing plate and the sleeve 3 are left outside the ground 50, and all other parts on the tip side from the reinforcing sleeve 3 are completely inserted into the ground 50. After the installation is completed and the state shown in FIG. 4A is obtained, a well-known pressure liquid injection adapter (not shown) is installed on the reinforcing sleeve 3 on the hand side, and compressed water or the like is supplied through the injection hole 4. Inject pressure fluid. As shown in FIG. 4B, the injection of the pressurized liquid causes the double pipe 2 to expand and expand in a radial direction (the direction of arrow C in FIG. 4B) at a predetermined portion 2a (described later). After that, when the pressure fluid injection adapter is removed, the pressure fluid comes out.
An appropriate injection material is injected into the inside of the device.
【0010】このように二重管2の放射方向(矢印C方
向)における膨張拡径により、該二重管2は周囲の地山
50に押し付けられ、パイプ式ロックボルト1が地山5
0に定着され支保工としての効果を発揮する。またパイ
プ式ロックボルト1周囲の地山50は、二重管2によっ
て放射方向(矢印C方向)に押圧され締め付けられると
共に、二重管2が膨張拡径する分、該二重管2の軸心方
向(矢印A、B方向)の全長が縮むことにより、前記地
山50は軸心方向(矢印A、B方向)に圧密され、強固
な地盤に改良される。このように本実施例のパイプ式ロ
ックボルト1では従来型のパイプ式ロックボルトで発揮
していた効果を損なうことがない。As described above, due to the expansion and diameter expansion of the double pipe 2 in the radial direction (the direction of arrow C), the double pipe 2 is pressed against the surrounding ground 50, and the pipe-type lock bolt 1 is
It is fixed to 0 and exerts the effect as a shoring work. The ground 50 around the pipe-type lock bolt 1 is pressed and tightened in the radial direction (the direction of arrow C) by the double pipe 2, and the shaft of the double pipe 2 is expanded to the extent that the double pipe 2 expands and expands. As the total length in the center direction (arrows A and B directions) shrinks, the ground 50 is compacted in the axial center direction (arrows A and B directions) and is improved into a firm ground. As described above, the pipe-type lock bolt 1 of the present embodiment does not impair the effects exhibited by the conventional pipe-type lock bolt.
【0011】ところで二重管2のうち拘束パイプ7が挿
嵌された部位2b(及び補強用スリーブ3、5が挿嵌さ
れた部位)は、この拘束パイプ7(又は補強用スリーブ
3、5)によって拘束されており殆ど膨張拡径できない
ので、上述した二重管2の膨張拡径は、図4(b)に示
すように拘束パイプ7(又は補強用スリーブ3、5)が
挿嵌されていない部位2aのみで行われる。つまり、二
重管2の外周には、膨張拡径した部位2aと、膨張拡径
していない部位2bによって軸心方向(矢印A、B方
向)に連なる形で凹凸が形成されることになる。従っ
て、パイプ式ロックボルト1に引抜方向(図4(b)の
矢印A方向)の力が作用する際には、部位2a、2bに
よる凹凸が地山50にひっかかる形となり大きな引抜抵
抗を発揮する。特に、図4(b)に示すように地山50
のうち各部位2aに対して軸心方向(矢印A、B方向)
に隣接する部位αは削孔されていない領域であり(即ち
パイプ式ロックボルト1を地山50に打設する際に荒さ
れていない領域であり)、従ってもとのままの大きな剪
断耐力を保持しているため、二重管2の部位2aにより
この部位αを剪断するには極めて大きな引抜力を必要と
する。即ち、パイプ式ロックボルト1の軸心方向(矢印
A、B方向)における移動は通常殆ど許容されることが
ない。このように本実施例のパイプ式ロックボルト1で
は拘束パイプ7等が設けられていない従来型のパイプ式
ロックボルトに比べて大きな引抜抵抗を発揮でき、従っ
て地山50から抜けにくい優れたパイプ式ロックボルト
となっている。The portion 2b of the double pipe 2 where the restraining pipe 7 is inserted (and the portion where the reinforcing sleeves 3 and 5 are inserted) is the same as the restraining pipe 7 (or the reinforcing sleeves 3 and 5). As shown in FIG. 4 (b), the expansion and expansion of the double pipe 2 is performed by inserting the restraining pipe 7 (or the reinforcing sleeves 3 and 5). This is performed only at the portion 2a that does not exist. That is, irregularities are formed on the outer periphery of the double pipe 2 in such a manner as to extend in the axial direction (the directions of arrows A and B) by the expanded and expanded portions 2a and the non-expanded and expanded portions 2b. . Therefore, when a force is applied to the pipe-type lock bolt 1 in the pull-out direction (the direction of the arrow A in FIG. 4B), the irregularities due to the portions 2a and 2b are hooked on the ground 50 and exhibit a large pull-out resistance. . In particular, as shown in FIG.
Axis direction (arrow A, B direction) with respect to each part 2a
Is an area that has not been drilled (that is, an area that has not been roughened when the pipe-type lock bolt 1 is driven into the ground 50), and therefore has a large shear strength as it is. Because of the holding, shearing this portion α by the portion 2a of the double pipe 2 requires an extremely large pulling force. That is, the movement of the pipe-type lock bolt 1 in the axial direction (the directions of arrows A and B) is generally hardly allowed. As described above, the pipe-type lock bolt 1 of the present embodiment can exhibit a greater pull-out resistance than the conventional pipe-type lock bolt in which the restraining pipe 7 and the like are not provided. It is a lock bolt.
【0012】図5は本発明の第2実施例のパイプ式ロッ
クボルトの斜視図、図6は第2実施例の拘束パイプの側
面図である。パイプ式ロックボルト11は、第1実施例
のパイプ式ロックボルトと拘束パイプの構造だけが異な
っており、その他の構造は同じである。即ち、第2実施
例のパイプ式ロックボルト11は、拘束パイプ17を所
定の間隔L2で2個(図5では2個であるが1個以上で
あれば何個でもよい)を有している。各拘束パイプ17
は図6の側面図に示すように円筒状スリーブの両側を中
心軸に対して斜め方向にカットして作成したものであ
る。尚、第1実施例の拘束パイプ7は、円筒状のパイプ
材の両側を中心軸に対して直角方向にカットして作成し
たものである。従って、各拘束パイプ17は、二重管2
の外周を、該二重管2の軸心方向(矢印A、B方向)に
垂直な面内において、周方向全周に亙って連続的に被覆
する本体部17a(図6では長さD2に相当する部位)
及び、周方向に部分的に被覆する形で、本体部該17a
から二重管2の軸心方向(矢印A、B方向)に突出形成
された突出部17b、17b(図6では長さD1、D3
に相当する部位)から構成されている。また二重管2の
うち、平らに押し潰した鋼管を筒状に丸めることにより
両側部が出会って形成されている部分を折り部2t(図
5)とすると、各拘束パイプ17の一方の突出部17b
が該折り部2tに沿って位置するように配置されてい
る。FIG. 5 is a perspective view of a pipe-type lock bolt according to a second embodiment of the present invention, and FIG. 6 is a side view of a restraining pipe according to the second embodiment. The pipe-type lock bolt 11 is different from the pipe-type lock bolt of the first embodiment only in the structure of the restraining pipe, and the other structures are the same. That is, the pipe-type lock bolt 11 of the second embodiment has two restriction pipes 17 at a predetermined interval L2 (two in FIG. 5, but may be any number as long as it is one or more). . Each restraint pipe 17
As shown in the side view of FIG. 6, the both sides of the cylindrical sleeve are cut obliquely to the center axis. The constraining pipe 7 of the first embodiment is formed by cutting both sides of a cylindrical pipe material in a direction perpendicular to the central axis. Therefore, each restraining pipe 17 is a double pipe 2
The body 17a (length D2 in FIG. 6) continuously covers the outer circumference of the double pipe 2 over the entire circumference in a plane perpendicular to the axial direction of the double pipe 2 (the directions of arrows A and B). Site equivalent to)
And, in the form of partially covering in the circumferential direction, the main body portion 17a
Projecting portions 17b, 17b (lengths D1, D3 in FIG. 6) which are formed in the axial direction (arrows A, B directions) of the double pipe 2 from
). Further, when a portion formed by rolling a flatly crushed steel pipe into a tubular shape and having both sides meeting each other is formed as a folded portion 2t (FIG. 5), one of the constraining pipes 17 protrudes. Part 17b
Are arranged along the folded portion 2t.
【0013】図7は第2実施例の拘束パイプの作用説明
図である。パイプ式ロックボルト11を地山50に打設
設置し、二重管2内に圧液を注入すると、図7(a)に
示すように、二重管2のうち拘束パイプ17が挿嵌され
ていない部位2aが矢印C方向である放射方向に膨張拡
径する。各拘束パイプ17では、本体部17aに比べて
構造上剛性が小さくなっている突出部17b、17b
が、二重管2が膨脹する力によって矢印C方向に押圧さ
れ変形される。変形した突出部17b、17bは地山5
0に食い込んでパイプ式ロックボルト11の引抜抵抗を
向上させる。また、二重管2が膨張する際、該二重管2
の構造上、特に折り部2tの部位が図7(b)の紙面上
方向に大きく膨張しようとするので、折り部2tに沿っ
て位置している各拘束パイプ17の突出部17bは大き
く変形させられる。更に、この突出部17bは二重管の
全周を拘束していないので二重管の膨張が進行すると図
7(c)に示すように変形の結果破断することになる。
破断した各拘束パイプ17の突出部17bは、矢尻状に
なり地山50に食い込むので、パイプ式ロックボルト1
1は更に大きな引抜抵抗を発揮することができる。ま
た、破断しなかった部分17aは二重管を拘束してその
膨張を阻止するので、結果として、図7(a)のように
ロックボルトに不均質な凹凸部が形成される。この結
果、打設完了済みロックボルトに引き抜き方向の力が作
用すると、ロックボルトに形成された凹凸と斜めカット
された拘束パイプの破断部分が地山に引っ掛かる形とな
って、引抜抵抗を増大させる。よって、拘束パイプがな
い従来品に比して大きな引抜抵抗を発揮することができ
る。FIG. 7 is an explanatory view of the operation of the restraint pipe of the second embodiment. When the pipe-type lock bolt 11 is driven into the ground 50 and the pressurized liquid is injected into the double pipe 2, the constraining pipe 17 of the double pipe 2 is inserted as shown in FIG. The unexposed portion 2a expands and expands in the radial direction, which is the direction of arrow C. In each of the constraining pipes 17, the protruding portions 17b, 17b, which are structurally less rigid than the main body portion 17a,
Is deformed by being pushed in the direction of arrow C by the expanding force of the double pipe 2. The deformed protrusions 17b, 17b
0 to improve the pull-out resistance of the pipe-type lock bolt 11. When the double pipe 2 expands, the double pipe 2
In particular, since the portion of the folded portion 2t tends to expand significantly in the upward direction in the drawing of FIG. 7B, the projecting portion 17b of each restraining pipe 17 located along the folded portion 2t is greatly deformed. Can be Further, since the protrusion 17b does not restrain the entire circumference of the double pipe, as the expansion of the double pipe progresses, the double pipe is broken as a result of deformation as shown in FIG. 7 (c).
The protruding portion 17b of each broken restriction pipe 17 has an arrowhead shape and bites into the ground 50, so that the pipe-type lock bolt 1
No. 1 can exhibit even greater pull-out resistance. In addition, since the portion 17a that has not been broken restrains the double pipe to prevent its expansion, as a result, an uneven portion is formed on the lock bolt as shown in FIG. 7A. As a result, when a force in the pull-out direction acts on the completed lock bolt, the unevenness formed on the lock bolt and the broken portion of the restrained pipe cut obliquely are hooked on the ground, thereby increasing the pull-out resistance. . Therefore, a greater pull-out resistance can be exhibited as compared with a conventional product without a constraining pipe.
【0014】図8は第3実施例のパイプ式ロックボルト
の斜視図、図9は第3実施例の拘束パイプの側面図であ
る。第3実施例のパイプ式ロックボルト21は第1実施
例のパイプ式ロックボルトと拘束パイプの構造だけが異
なっており、その他の構造は同じである。即ち、第3実
施例のパイプ式ロックボルト21はスリットが形成され
た拘束パイプ27を有している。尚、図8において拘束
パイプ27は1個のみ示しているが、複数個配設しても
よい。拘束パイプ27は図8の斜視図および図9の側面
図に示すように円筒状スリーブの軸方向にスリット27
c、27cを有する形状を備えている。すなわち、拘束
パイプ27は、二重管2の外周を、該二重管2の軸心方
向(矢印A、B方向)に垂直な面内において、周方向全
周に亙って連続的に被覆する本体27a(図9では長さ
D12に相当する部位)及び、周方向に部分的に被覆す
る形で、本体27aから二重管2の軸心方向(矢印A方
向)に突出形成された突出部27b(図9では長さD1
1に相当する部位)から構成されている。即ち、突出部
27bは、二重管2の軸心方向(矢印A、B方向)に形
成されたスリット27cによって分割された筒状に形成
されている。尚、本実施例ではスリット27cは2つだ
けであるが、スリットを3つ以上形成してもよい。FIG. 8 is a perspective view of a pipe-type lock bolt according to a third embodiment, and FIG. 9 is a side view of a restraining pipe according to the third embodiment. The pipe-type lock bolt 21 of the third embodiment differs from the pipe-type lock bolt of the first embodiment only in the structure of the restraining pipe, and the other structures are the same. That is, the pipe-type lock bolt 21 of the third embodiment has a restraining pipe 27 in which a slit is formed. Although only one restraining pipe 27 is shown in FIG. 8, a plurality of restraining pipes may be provided. As shown in the perspective view of FIG. 8 and the side view of FIG.
c, 27c. That is, the constraining pipe 27 continuously covers the outer periphery of the double pipe 2 over the entire circumference in the plane perpendicular to the axial direction of the double pipe 2 (the directions of arrows A and B). The main body 27a (the portion corresponding to the length D12 in FIG. 9) and a projection formed so as to partially cover in the circumferential direction and protrude from the main body 27a in the axial direction of the double pipe 2 (the direction of arrow A). Portion 27b (length D1 in FIG. 9)
1). That is, the protruding portion 27b is formed in a cylindrical shape divided by a slit 27c formed in the axial direction of the double pipe 2 (the direction of arrows A and B). In this embodiment, only two slits 27c are provided, but three or more slits may be formed.
【0015】図10は第3実施例の拘束パイプの作用説
明図である。パイプ式ロックボルト21を地山50に打
設設置し(図10(a))、二重管2内に圧液を注入す
ると、拘束パイプ27はスリット27cがある部分は変
形しやすくスリットがない部分は変形し難いので、二重
管の膨張拡径とともに図10(b)のように、空出部2
7bのみが二重管の膨張を許容し、本体部27aが二重
管を拘束し続ける。この結果、ボルトに凹凸が形成さ
れ、さらに、拘束パイプ27のスリット27cによって
大きく変形した部分が地山に食い込んだ形となる。すな
わち、圧液注入により二重管2のうち拘束パイプ27が
挿嵌されていない部位2aが膨張拡径する。又、拘束パ
イプ27の部位では、本体部27aに比べて構造上剛性
が小さくなっている突出部27bが、特に剛性が小さい
スリット27cの近傍部分において、二重管2が膨脹す
る力によって外側方向に押圧されて変形する。この変形
した突出部27bが地山50に食い込んでパイプ式ロッ
クボルト11の引抜抵抗を向上させる。この場合、スリ
ット27cを二重管2の折り部2tに沿って配置してお
けば第2実施例と同じ要領で突出部27bの変形を大き
くでき、引抜抵抗を更に向上できる。又、拘束パイプ2
7の突出部27bは、本体部27aの手元側(矢印A
側)に設けられており、又、二重管2の膨張拡径によ
り、該二重管2の軸心方向の全長が膨張前に比べて短く
なり、その結果、膨張拡径が進行する際に二重管2全体
が補強スリーブ3側の図示しない座金に向かって手元方
向(矢印A方向)に引っ張られることになる。この引っ
張りにより、拘束パイプ27の突出部27bは一層地山
に食い込むことになり、パイプ式ロックボルト21の地
山に対する定着は一層確実なものとなる。以上より、打
設完了済みロックボルトに引き抜き方向の力が作用する
と、ロックボルトによって生じた凹凸部と、拘束パイプ
の地山に引っ掛かった部位とで、大きな引抜抵抗を発揮
し、容易に抜けることがない。FIG. 10 is a diagram for explaining the operation of the restraint pipe according to the third embodiment. When the pipe-type lock bolt 21 is set in the ground 50 (FIG. 10 (a)) and the pressurized liquid is injected into the double pipe 2, the portion of the restraining pipe 27 having the slit 27c is easily deformed and has no slit. Since the portion is hardly deformed, as shown in FIG.
Only 7b allows the expansion of the double pipe, and the body 27a continues to restrain the double pipe. As a result, unevenness is formed on the bolt, and the portion largely deformed by the slit 27c of the constraining pipe 27 is cut into the ground. That is, the portion 2a of the double pipe 2 where the constraining pipe 27 is not inserted is expanded and expanded by the pressurized liquid injection. Further, at the portion of the constraining pipe 27, the protruding portion 27b, which is structurally less rigid than the main body portion 27a, is turned outward by the force of the double pipe 2 expanding, particularly in the vicinity of the slit 27c, which has less rigidity. And is deformed. The deformed protruding portion 27b cuts into the ground 50 and improves the pull-out resistance of the pipe-type lock bolt 11. In this case, if the slit 27c is arranged along the folded portion 2t of the double pipe 2, the deformation of the protruding portion 27b can be increased in the same manner as in the second embodiment, and the pull-out resistance can be further improved. In addition, restraint pipe 2
7 is located on the hand side of the main body 27a (arrow A).
Side), and due to the expansion and expansion of the double pipe 2, the overall length of the double pipe 2 in the axial direction becomes shorter than before the expansion, and as a result, when the expansion and expansion proceeds Then, the entire double pipe 2 is pulled in the hand direction (the direction of arrow A) toward the washer (not shown) on the reinforcing sleeve 3 side. By this pulling, the protruding portion 27b of the constraining pipe 27 bites further into the ground, and the fixing of the pipe-type lock bolt 21 to the ground is further ensured. As described above, when the force in the pull-out direction is applied to the already-installed lock bolt, the unevenness generated by the lock bolt and the portion of the restrained pipe that caught on the ground exert a large pull-out resistance and can be easily pulled out. There is no.
【0016】[0016]
【発明の効果】以上説明したように本発明によれば、パ
イプ式ロックボルトを地山に打設設置し、本体管内を加
圧すると、本体管は膨張拘束筒状部材が挿嵌されていな
い部位で膨張拡径し、膨張拘束筒状部材が挿嵌されてい
る部位で殆ど膨張拡径しない。この結果、本体管の外周
に、膨張拡径した部位と殆ど膨張拡径していない部位が
発生し、軸心方向に連なる形で凹凸が形成されることに
なり、パイプ式ロックボルトに軸心方向、従って引抜方
向の力が作用しても、本体管の外周の凹凸が地山にひっ
かかることになり大きな引抜抵抗を発揮できる。As described above, according to the present invention, when the pipe-type lock bolt is driven into the ground and the inside of the main body pipe is pressurized, the main body pipe is not fitted with the expansion-restraining tubular member. The diameter expands and expands at the portion, and hardly expands and expands at the portion where the expansion restricting tubular member is inserted. As a result, a portion where the diameter is expanded and a portion where the diameter is not expanded are generated on the outer periphery of the main body pipe, and irregularities are formed in a form connected in the axial direction. Even if a force is applied in the direction, that is, in the pulling direction, the irregularities on the outer circumference of the main body tube will be caught on the ground, and a large pulling resistance can be exhibited.
【0017】また本発明によれば、膨張拘束筒状部材を
本体管の外周に所定の間隔で複数個配設しているので、
パイプ式ロックボルトの地山に対する引抜抵抗を更に向
上することができる。Further, according to the present invention, since a plurality of expansion-constrained tubular members are arranged at a predetermined interval on the outer periphery of the main body tube,
The pull-out resistance of the pipe-type lock bolt against the ground can be further improved.
【0018】また本発明によれば、円筒スリーブの両端
を斜めにカットして膨張拘束筒状部材を形成したから、
膨張拡径により膨張拘束筒状部材の一部が破断して矢尻
状になって地山に食い込むことになるので、パイプ式ロ
ックボルトの地山に対する引抜抵抗を更に向上すること
ができる。Further, according to the present invention, since both ends of the cylindrical sleeve are cut obliquely to form the expansion-constrained cylindrical member,
A part of the expansion-restraining cylindrical member is broken by the expansion and expansion, and becomes in the shape of an arrowhead and bites into the ground, so that the pull-out resistance of the pipe-type lock bolt against the ground can be further improved.
【0019】また本発明によれば、円筒スリーブの軸方
向にスリットを設けて膨張拘束筒状部材を形成したか
ら、膨張拡径により膨張拘束筒状部材の一部、すなわ
ち、スリット近辺が外側方向に地山に食い込む形で変形
し、変形部分が地山に食い込みパイプ式ロックボルトの
地山に対する引抜抵抗を更に向上することができる。Further, according to the present invention, the slit is provided in the axial direction of the cylindrical sleeve to form the expansion-constrained cylindrical member. Therefore, a part of the expansion-constrained cylindrical member, that is, the vicinity of the slit is outwardly expanded by expanding the diameter. Thus, the deformed portion cuts into the ground, and the deformed portion cuts into the ground to further improve the pull-out resistance of the pipe-type lock bolt with respect to the ground.
【図1】図1は、本発明の第1実施例のパイプ式ロック
ボルトの一例を示した斜視図である。FIG. 1 is a perspective view showing an example of a pipe-type lock bolt according to a first embodiment of the present invention.
【図2】図1のX1−Y1線断面図である。FIG. 2 is a sectional view taken along line X1-Y1 of FIG.
【図3】図1のX2−Y2線断面図である。FIG. 3 is a sectional view taken along line X2-Y2 of FIG.
【図4】本発明のパイプ式ロックボルトの施工方法説明
図である。FIG. 4 is an explanatory view of a method of installing a pipe-type lock bolt of the present invention.
【図5】本発明の第2実施例によるパイプ式ロックボル
トの斜視図である。FIG. 5 is a perspective view of a pipe-type lock bolt according to a second embodiment of the present invention.
【図6】第2実施例の拘束パイプの側面図である。FIG. 6 is a side view of a restraining pipe according to a second embodiment.
【図7】第2実施例の拘束パイプの作用説明図である。FIG. 7 is an explanatory view of an operation of the restraint pipe of the second embodiment.
【図8】本発明の第3実施例によるパイプ式ロックボル
トの斜視図である。FIG. 8 is a perspective view of a pipe-type lock bolt according to a third embodiment of the present invention.
【図9】拘束パイプの側面図である。FIG. 9 is a side view of a restraining pipe.
【図10】第3実施例の拘束パイプの作用説明図であ
る。FIG. 10 is a diagram illustrating the operation of the restraint pipe according to the third embodiment.
【図11】パイプ式ロックボルトの製法を示す説明図で
ある。FIG. 11 is an explanatory diagram showing a method of manufacturing a pipe-type lock bolt.
【図12】従来のパイプ式ロックボルトの斜視図であ
る。FIG. 12 is a perspective view of a conventional pipe-type lock bolt.
【図13】従来のパイプ式ロックボルトの断面図であ
る。FIG. 13 is a sectional view of a conventional pipe-type lock bolt.
【図14】従来のパイプ式ロックボルトの使用方法説明
図である。FIG. 14 is an explanatory view of how to use a conventional pipe-type lock bolt.
【図15】従来のパイプ式ロックボルトの効果説明図で
ある。FIG. 15 is an explanatory diagram of an effect of a conventional pipe-type lock bolt.
【図16】従来のパイプ式ロックボルトの別の効果説明
図である。FIG. 16 is a view for explaining another effect of the conventional pipe type lock bolt.
【符号の説明】 1・・パイプ式ロックボルト 2・・本体管(二重管) 3・・打設後端部材(補強用スリーブ) 5・・打設先端部材(補強用スリーブ) 7・・膨張拘束筒状部材(拘束パイプ)[Description of Signs] 1. Pipe type lock bolt 2. Main body pipe (double pipe) 3. Rear end member for installation (reinforcement sleeve) 5. End member for installation (reinforcement sleeve) 7. Expansion restraint tubular member (restraint pipe)
Claims (4)
を有し、該本体管の一端に打設先端部材を、他端に圧液
を注入するための注入孔を有する打設後端部材をそれぞ
れ設けたパイプ式ロックボルトにおいて、 前記打設先端部材と打設後端部材との間の本体管の外周
に膨張拘束筒状部材を配設してなることを特徴とするパ
イプ式ロックボルト。1. A main body tube which is inflated and expandable by injecting a pressurized liquid, and has a front end member mounted at one end of the main body tube and a pouring hole at the other end for injecting the pressurized liquid. A pipe-type lock bolt provided with a rear end member, wherein an expansion-constrained tubular member is disposed on an outer periphery of a main body tube between the casting front end member and the casting rear end member. Type lock bolt.
外周に所定の間隔で複数個配設されていることを特徴と
する請求項1記載のパイプ式ロックボルト。2. The pipe-type lock bolt according to claim 1, wherein a plurality of said expansion-constrained tubular members are arranged at predetermined intervals on the outer periphery of said main body tube.
の両端を斜めにカットした形状を有することを特徴とす
る請求項1又は請求項2記載のパイプ式ロックボルト。3. The pipe-type lock bolt according to claim 1, wherein the expansion restricting tubular member has a shape in which both ends of a cylindrical sleeve are obliquely cut.
の軸方向にスリットを有する形状を備えたことを特徴と
する請求項1または請求項2記載のパイプ式ロックボル
ト。4. The pipe-type lock bolt according to claim 1, wherein the expansion restricting tubular member has a shape having a slit in an axial direction of the cylindrical sleeve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17239798A JP4107717B2 (en) | 1998-06-19 | 1998-06-19 | Pipe type lock bolt |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17239798A JP4107717B2 (en) | 1998-06-19 | 1998-06-19 | Pipe type lock bolt |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000008796A true JP2000008796A (en) | 2000-01-11 |
JP4107717B2 JP4107717B2 (en) | 2008-06-25 |
Family
ID=15941191
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17239798A Expired - Lifetime JP4107717B2 (en) | 1998-06-19 | 1998-06-19 | Pipe type lock bolt |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4107717B2 (en) |
Cited By (9)
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---|---|---|---|---|
WO2005073510A1 (en) * | 2004-01-28 | 2005-08-11 | Denki Kagaku Kogyo Kabushiki Kaisha | Expandable injection bolt and grouting method using same |
JP2008050763A (en) * | 2006-08-22 | 2008-03-06 | Nisshin Steel Co Ltd | Expansion steel pipe for restoring settlement foundation |
JP2008231808A (en) * | 2007-03-22 | 2008-10-02 | Kajima Corp | Reinforcing tool and natural ground reinforcing method |
KR100972357B1 (en) * | 2009-02-09 | 2010-07-26 | 주식회사 상신산업 | Expandable tube type rock bolt |
WO2010090500A2 (en) * | 2009-02-09 | 2010-08-12 | 주식회사 상신산업 | Expandable rock bolt tube |
JP2012255318A (en) * | 2011-06-10 | 2012-12-27 | Kajima Corp | Expansion-type lock bolt having protrusion |
WO2012103561A3 (en) * | 2011-01-31 | 2013-03-21 | Atlas Copco Mai Gmbh | Protective device for (rock) bolts and friction bolts |
KR20150073227A (en) * | 2013-11-26 | 2015-07-01 | 주식회사 티에스테크노 | End part joining type rockbolt |
JP2017031726A (en) * | 2015-08-04 | 2017-02-09 | 東海旅客鉄道株式会社 | Lock bolt and construction method thereof |
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CA2503791A1 (en) | 2002-10-22 | 2004-05-06 | Jason A. Sullivan | Non-peripherals processing control module having improved heat dissipating properties |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005073510A1 (en) * | 2004-01-28 | 2005-08-11 | Denki Kagaku Kogyo Kabushiki Kaisha | Expandable injection bolt and grouting method using same |
JP2007528456A (en) * | 2004-01-28 | 2007-10-11 | 電気化学工業株式会社 | Expansion injection bolt and injection method using the same |
JP4902351B2 (en) * | 2004-01-28 | 2012-03-21 | 電気化学工業株式会社 | Expansion injection bolt and injection method using the same |
JP2008050763A (en) * | 2006-08-22 | 2008-03-06 | Nisshin Steel Co Ltd | Expansion steel pipe for restoring settlement foundation |
JP2008231808A (en) * | 2007-03-22 | 2008-10-02 | Kajima Corp | Reinforcing tool and natural ground reinforcing method |
KR100972357B1 (en) * | 2009-02-09 | 2010-07-26 | 주식회사 상신산업 | Expandable tube type rock bolt |
WO2010090500A2 (en) * | 2009-02-09 | 2010-08-12 | 주식회사 상신산업 | Expandable rock bolt tube |
WO2010090500A3 (en) * | 2009-02-09 | 2010-10-21 | 주식회사 상신산업 | Expandable rock bolt tube |
WO2012103561A3 (en) * | 2011-01-31 | 2013-03-21 | Atlas Copco Mai Gmbh | Protective device for (rock) bolts and friction bolts |
JP2012255318A (en) * | 2011-06-10 | 2012-12-27 | Kajima Corp | Expansion-type lock bolt having protrusion |
KR20150073227A (en) * | 2013-11-26 | 2015-07-01 | 주식회사 티에스테크노 | End part joining type rockbolt |
JP2017031726A (en) * | 2015-08-04 | 2017-02-09 | 東海旅客鉄道株式会社 | Lock bolt and construction method thereof |
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