JPH074600U - Injection fixing type support member - Google Patents
Injection fixing type support memberInfo
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- JPH074600U JPH074600U JP3525193U JP3525193U JPH074600U JP H074600 U JPH074600 U JP H074600U JP 3525193 U JP3525193 U JP 3525193U JP 3525193 U JP3525193 U JP 3525193U JP H074600 U JPH074600 U JP H074600U
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- Prior art keywords
- liquid
- porous elastic
- fixing type
- injection
- supporting member
- 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.)
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Abstract
(57)【要約】
【目的】 作業者に負担を掛けることなく、確実に注入
液をシールすることのできる注液定着式支保部材を提供
する。
【構成】 ロックボルト30の手元側外周面に、間隔をあ
け多孔質弾性部材36〜40を装着して、打込時に、弾性復
元力でボアホールとロックボルト30の間を緩やかにシー
ルドし、その後、ロックボルト30の内部を通してボアホ
ール内に注入された注入液を多孔質弾性部材36より先端
側に滞留可能とする。注入液から弱い初期圧力を受ける
多孔質弾性部材36には注入液が浸透するが速度は遅く、
多孔質弾性部材36内で硬化が進み、仮にボアホール内に
注入液が満杯になったことで、高圧力が掛かって多孔質
弾性部材38側に一部リークしても、その圧力は弱く、多
孔質弾性部材36、38の間での滞留、硬化や、多孔質弾性
部材38への浸透、硬化により注入液の外部への洩れが阻
止され、最終的には多孔質弾性部材40で阻止される。
(57) [Summary] [Purpose] To provide a liquid injection fixing type supporting member capable of reliably sealing an infusion liquid without burdening an operator. [Structure] Attach the porous elastic members 36 to 40 to the outer peripheral surface of the lock bolt 30 on the proximal side so as to gently shield between the bore hole and the lock bolt 30 by elastic restoring force at the time of driving. The injection liquid injected into the bore hole through the inside of the lock bolt 30 can be retained on the tip side of the porous elastic member 36. The pouring liquid permeates the porous elastic member 36 that receives a weak initial pressure from the pouring liquid, but the speed is slow,
The hardening progresses in the porous elastic member 36, and even if the injection liquid is full in the bore hole, even if a high pressure is applied and a part leaks to the porous elastic member 38 side, the pressure is weak and Leakage of the infused liquid to the outside is prevented by stagnation and curing between the porous elastic members 36 and 38, permeation into the porous elastic member 38, and curing, and finally by the porous elastic member 40. ..
Description
【0001】[0001]
本考案はトンネル工事、擁壁工事等で用いるロックボルト等を本体とした注液 定着式支保部材に係り、特に定着用の注入液がロックボルト等の本体と岩盤、地 盤等の間の隙間から洩れ出ないようにした注液定着式支保部材に関する。 The present invention relates to a liquid injection fixing type support member mainly composed of lock bolts used in tunnel construction, retaining wall construction, etc., and particularly, the fixing injection liquid is a gap between the main body of rock bolts etc. and rock or ground. The present invention relates to a liquid injection fixing type supporting member that does not leak from the liquid.
【0002】[0002]
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、モルタル、定着剤、地山改良材等の所定の注入 液(注入材)で定着させて内壁周辺の崩落を防ぐようにしている。 ロックボルトは、予め、穿岩機等で岩盤に孔(ボアホール)をあけておき、該 穴に後からロックボルトを打ち込んだり、アダプタを介して穿岩機で自穿孔ロッ クボルトを回転させ、該自穿孔ロックボルトの先端に装着したビットで岩盤を掘 削しながら打ち込んだりするようになっている。 In the NATO method (NATM method), which is common in tunnel construction in mountains, etc., after excavating the natural ground (if necessary, after cementing the wall with cement), a number of rock bolts are vertically inserted from the wall into the bedrock. A predetermined injection liquid (injection material) such as implantation, mortar, fixing agent, ground improvement material, etc. is used to fix and prevent collapse around the inner wall. For the lock bolt, a hole (bore hole) is made in the rock bed in advance with a rock drill, etc., and the lock bolt is driven into the hole afterwards, or the self-drilling rock bolt is rotated by the rock drill through the adapter. Bits attached to the ends of self-drilling rock bolts are used to excavate rock while excavating.
【0003】 図15は、予め岩盤にボアホールを穿設しておき、注入パイプ、排気パイプを 用いて注入液を注入する場合のロックボルト使用例を示す。 地山10に掘削したトンネル12の内壁14から該内壁14に対し垂直に岩盤 内部へ所定深さのボアホール16を穿孔したのち、ロックボルト18を打ち込む 。ロックボルト18には、予め、注入パイプ20、排気パイプ22、パッカー2 4が取りつけてある。 パッカー24は、図16に示す如く、布部材をロックボルト18の口元所定箇 所に袋状となるようにテープ等で装着したものであり、ロックボルト18での該 パッカー24の装着位置に当たる注入パイプ20には噴出口26が形成されてい る。FIG. 15 shows an example of use of a rock bolt in the case where a borehole is previously drilled in rock and an injection liquid is injected using an injection pipe and an exhaust pipe. After drilling a borehole 16 of a predetermined depth from the inner wall 14 of the tunnel 12 excavated in the natural ground 10 to the inside of the rock perpendicularly to the inner wall 14, the lock bolt 18 is driven. An injection pipe 20, an exhaust pipe 22, and a packer 24 are attached to the lock bolt 18 in advance. As shown in FIG. 16, the packer 24 is formed by attaching a cloth member to a predetermined position on the mouth of the lock bolt 18 with a tape or the like so as to form a bag shape. A jet port 26 is formed in the pipe 20.
【0004】 排気パイプ22からボアホール内の空気を排気しながら、注入パイプ20より 注入液(モルタル、定着剤、地山改良材等)を注入すると、注入パイプ20の噴 出口26から注入液がパッカー24の内部に入り、該パッカー24を膨大させる 。これにより、ロックボルト18の口元付近で、ロックボルト18とボアホール 16の間の隙間が密閉される。一方、注入パイプ20の先端からも注入液がボア ホール内に出て、該ボアホール16とロックボルト18の間の隙間に充填されて いく。この際、ボアホール16内の空気は排気パイプ22を通ってトンネル12 内に排気される。 但し、注入液で膨らんだパッカー24がシールの働きをするので、ボアホール 内に注入液の充填不良箇所が生じることはない。When the injection liquid (mortar, fixing agent, ground improving agent, etc.) is injected from the injection pipe 20 while exhausting the air in the borehole from the exhaust pipe 22, the injection liquid is injected from the injection port 26 of the injection pipe 20 to the packer. Enter the inside of 24 and enlarge the packer 24. As a result, the gap between the lock bolt 18 and the bore hole 16 is sealed near the mouth of the lock bolt 18. On the other hand, the injection liquid also comes out from the tip of the injection pipe 20 into the bore hole, and fills the gap between the bore hole 16 and the lock bolt 18. At this time, the air in the borehole 16 is exhausted into the tunnel 12 through the exhaust pipe 22. However, since the packer 24 swelled with the injection liquid acts as a seal, no defective filling portion of the injection liquid occurs in the borehole.
【0005】 一定量の注入液を注入した時点または排気パイプ22から注入液が洩れ出て来 た時点で作業完了であり、注入液の注入を止める。その後、注入液が硬化すれば 、ロックボルト18と内壁周辺が一体的に固着し、ロックボルト先端部の打ち込 まれた固い内部岩盤に支えられることで、内壁周辺の崩落が防止される。The work is completed when a certain amount of the injection liquid is injected or when the injection liquid leaks from the exhaust pipe 22, and the injection of the injection liquid is stopped. After that, when the injected liquid hardens, the lock bolt 18 and the periphery of the inner wall are integrally fixed, and supported by the hard internal rock in which the tip of the lock bolt is hammered in, whereby the collapse of the periphery of the inner wall is prevented.
【0006】 図17はパッカーの他の例を示す説明図である。パッカー28はゴム部材をロ ックボルト18の口元所定箇所に袋状となるようにテープ等で装着したもので、 この際、パッカー28の内部に開口する注入パイプ30も一緒に取りつけておく 。 そして、注入液の注入開始前から注入が完了するまでの間、注入パイプ30を 通してエア、水等をパッカー28の内部に送り込み、該パッカー28を膨大させ る。これにより、ロックボルト18の口元付近で、ロックボルト18とボアホー ル16の間の隙間を塞ぐことができ、注入液の充填不良を防止できる。FIG. 17 is an explanatory diagram showing another example of the packer. In the packer 28, a rubber member is attached to a predetermined position on the mouth of the lock bolt 18 with a tape or the like so as to form a bag. At this time, an injection pipe 30 opening inside the packer 28 is also attached. Then, from before the start of the injection of the injection liquid until the completion of the injection, air, water, etc. are fed into the packer 28 through the injection pipe 30 to expand the packer 28. As a result, it is possible to close the gap between the lock bolt 18 and the borehole 16 near the mouth of the lock bolt 18, and prevent defective filling of the injection liquid.
【0007】[0007]
ところで、従来のパッカー24、28は、ロックボルト18をボアホール16 に挿入し、打ち込んだ後、内部に注入液やエア、水等を送り込んで風船の如く、 袋状に膨らますことができるようにするため、布、ゴム等の比較的柔軟な膜部材 でしか形成できない。 一方、岩盤に穿孔するボアホール16をきれいな孔壁とするのは難しく、尖っ た岩が内部に露出していたり、砕けた岩が落ちていたりすることが多い。このた め、ロックボルト18をボアホール16に挿入し、打ち込む際に、パッカー24 、28が尖った岩や砕けた岩に擦れて一部が破損し、注入液やエア、水等を送り 込んでも膨大させられなくなる場合があった。 By the way, in the conventional packers 24 and 28, after inserting the lock bolt 18 into the bore hole 16 and driving it, it is possible to infuse injecting liquid, air, water or the like into the bag and inflate it like a balloon. Therefore, it can be formed only by a relatively flexible film member such as cloth or rubber. On the other hand, it is difficult to make the borehole 16 drilled in the bedrock a clean hole wall, and often sharp rocks are exposed inside or broken rocks fall. Therefore, when the lock bolt 18 is inserted into the bore hole 16 and driven in, the packers 24 and 28 rub against sharp rocks or crushed rocks and partly breaks, and even if injection liquid, air, water, etc. are sent in. There were times when it couldn't be overwhelmed.
【0008】 かかる場合、パッカー24、28がシール効果を発揮せず、注入パイプ20を 通してボアホール16の隙間に送り込んだ注入液が当該ボアホール16の口元か ら洩れ出てしまい、ボアホール16とロックボルト18間の隙間に充填不良が生 じてしまう。このとき、ウエスを口元から詰め込んだりしなければならず、余計 な手間が掛かるとともに、ウエスの詰め込み不良で注入液の洩れを防げなかった 場合には、ロックボルト16と内壁周辺との固着不良で所期の支保強度を確保で きなくなってしまうという問題があった。In such a case, the packers 24 and 28 do not exert a sealing effect, and the injection liquid sent through the injection pipe 20 into the gap of the borehole 16 leaks out from the mouth of the borehole 16 and locks with the borehole 16. Poor filling will occur in the gap between the bolts 18. At this time, it is necessary to pack the waste cloth from the mouth, which requires extra time, and if the waste cloth could not be prevented from leaking due to poor packing of the waste cloth, the lock bolt 16 and the surroundings of the inner wall could not be fixed properly. There was a problem that the desired support strength could not be secured.
【0009】 一方、自穿孔ロックボルトでは、回転させるため、よりパッカーを破損する危 険性が高いので、パッカーの使用ができず、打ち込み後、ボアホールの口元にウ エスや急結性のセメントを詰め込んでいたため作業負担が大きく、また、作業の バラツキにより詰め込み不良で注入液が洩れ出てしまう恐れもあった。On the other hand, since the self-drilling lock bolt is rotated, there is a high risk of damaging the packer, so the packer cannot be used, and after driving, waste or quick-setting cement is placed at the mouth of the borehole. Since it was packed, the work load was heavy, and there was a risk that the injection liquid would leak out due to poor packing due to variations in the work.
【0010】 以上から本考案の目的は、作業者に負担を掛けることなく、確実に注入液をシ ールすることのできる注液定着式支保部材を提供することである。In view of the above, an object of the present invention is to provide a liquid injection fixing type supporting member capable of reliably sealing an injecting liquid without imposing a burden on an operator.
【0011】[0011]
上記課題は本考案においては、ロックボルト、アンカー、グラウト管等の注液 定着式支保部材本体と、該注液定着式支保部材本体の手元近くに、軸方向に間隔 をあけて外周面を包み込むように装着した複数の多孔質弾性部材を設けたことに より達成される。 SUMMARY OF THE INVENTION In the present invention, the above-mentioned problem is to wrap the outer peripheral surface with a gap in the axial direction near the body of the liquid injection fixing type support member such as a lock bolt, an anchor, and a grout tube, and near the hand of the liquid injection fixing type support member main body. This is achieved by providing a plurality of porous elastic members thus mounted.
【0012】[0012]
【作用】 本考案によれば、注液定着式支保部材を地盤に打ち込むと、多孔質弾性部材が 圧縮され、弾性復元力でボアホールと注液定着式支保部材本体の間の隙間が緩や かにシーリングされる。この状態で、注液定着式支保部材本体内を通したり、注 入パイプを通したりしてボアホール内に注入液を注入すると、注液定着式支保部 材本体とボアホールの間で、最も先端寄りの多孔質弾性部材から見て先端側の第 1空間に注入液が充填されていき、一部は地盤に浸透する。 そして、注入液から弱い初期圧力を受けて、最も先端寄りの多孔質弾性部材の 中に注入液が浸透するが、多孔質弾性部材から抵抗を受けるので当初の浸透速度 は遅い。その後、第1空間に注入液が満杯となり圧力が高まったとき、多孔質弾 性部材内に注入液が目詰まり状態で入っていること、及び、或る程度硬化が進ん でいることから、耐圧性が高くなっており、注入液が一気に外部に洩れ出ること はなく、多孔質弾性部材内で完全に硬化していないときに、一部が最も先端寄り と2番目に先端寄りの多孔質弾性部材の間の第2空間に徐々に洩れ出て、該2番 目に先端に近い多孔質弾性部材に浸透するだけである。 第2空間での圧力は第1空間より遙かに弱くなり、2番目に先端寄りの多孔質 弾性部材の中への浸透速度はかなり遅いので、第2空間で滞留、硬化が進み、ま た、2番目に先端寄りの多孔質弾性部材の中で注入液の硬化が進む。完全に硬化 すれば、大きな耐圧性が生じて第2空間の注入液が外部に洩れ出ることはなくな り、これに伴い、先端に最も近い多孔質弾性部材内への注入液の浸透も止まり、 該多孔質弾性部材も硬化して大きな耐圧性を発揮するので、第1空間内を確実に 注入液で満たしかつ滞留、硬化させることができ、所期の支保強度を実現ること かできる。 なお、2番目に先端寄りの多孔質弾性部材の中で注入液が硬化する前に、第2 空間が注入液で満たされて圧力が高まったことで、2番目に先端寄りの多孔質弾 性部材より手元側の空間に洩れ出てきたとしても最早少量であり、3番目の多孔 質弾性部材があるときは、2番目の多孔質弾性部材と同様にして、注入液の外部 への洩れ出しが阻止される。According to the present invention, when the liquid injection fixing type supporting member is driven into the ground, the porous elastic member is compressed, and the elastic restoring force makes the gap between the bore hole and the liquid fixing type supporting member main body loose. To be sealed. In this state, when the injection liquid is injected into the borehole by passing it through the body of the liquid injection fixing type support member or the injection pipe, the tip of the liquid injection fixing type support member is located at the most tip end between the main body and the hole. The first space on the tip side when viewed from the porous elastic member is filled with the injection liquid, and a part of the liquid permeates into the ground. Then, when receiving a weak initial pressure from the injecting liquid, the injecting liquid permeates into the porous elastic member closest to the tip, but the initial permeation rate is low because of resistance from the porous elastic member. After that, when the injection liquid becomes full and the pressure increases in the first space, the injection liquid enters the porous elastic member in a clogged state, and the hardening progresses to a certain degree. Since the injection liquid does not leak to the outside at a stretch, and when it is not completely cured in the porous elastic member, part of it is the most distal porosity and the second is the most distal porosity. It gradually leaks into the second space between the members and permeates the second porous porous member near the tip. The pressure in the second space is much weaker than that in the first space, and the rate of penetration into the porous elastic member that is the second closest to the tip is fairly slow, so that retention and hardening proceed in the second space, and Second, the hardening of the injecting liquid proceeds in the porous elastic member closer to the tip. When completely cured, a large pressure resistance is generated and the injected liquid in the second space does not leak outside, and along with this, the permeation of the injected liquid into the porous elastic member closest to the tip also stops. Since the porous elastic member also hardens and exhibits a large pressure resistance, it is possible to reliably fill the first space with the injecting liquid, and to retain and harden it, so that the desired supporting strength can be realized. In addition, since the second space was filled with the injection liquid and the pressure increased before the injection liquid was hardened in the second porous elastic member near the tip, the porous elasticity near the second end was increased. Even if it leaks into the space nearer to the member, the amount is no longer small. If there is a third porous elastic member, the leakage of the infused liquid to the outside will be the same as for the second porous elastic member. Is blocked.
【0013】 このように、注液定着式支保部材本体の手元近くに装着した複数の多孔質弾性 部材により注入液のシールドを確実に行うことができるので、注入作業中、注入 液が外部に洩れて、注液定着式支保部材本体とボアホールの間の隙間に注入液の 充填不良が生じるようなことはなく、よって、従来の如き、パッカーを膨らませ たり、パッカーが破れた場合の漏れ止めをしたり、注液定着式支保部材本体が自 穿孔式の場合のように、ウエスや急結性セメントを詰めたりしなくて済み、現場 での作業負担が大幅に軽減する。In this way, the pouring liquid can be reliably shielded by the plurality of porous elastic members mounted near the body of the pouring fixing type supporting member body, so that the pouring liquid leaks to the outside during the pouring operation. As a result, there is no possibility of inadequate filling of the injection liquid in the gap between the body of the liquid injection fixing type support member and the borehole. In addition, unlike the case where the body of the liquid injection fixing type supporting member is self-drilling type, there is no need to pack waste cloth or quick-setting cement, and the work load on site is greatly reduced.
【0014】 また、中空で先端等に1または複数の噴出口が設けられたロックボルト、アン カー、グラウト管等の注液定着式支保部材本体を有する注液定着式支保部材にお いて、注液定着式支保部材本体の手元近くに、軸方向に間隔をあけながら外周面 を包み込むように装着した複数の多孔質弾性部材を設けるとともに、多孔質弾性 部材間の注液定着式支保部材本体に噴出口を穿設する。 これにより、注液定着式支保部材本体を地盤に打ち込んだあと、注入液の注入 を行うと、まず、手元近くの噴出口から多孔質弾性部材間の空間に注入液が入り 、該多孔質弾性部材内にも浸透する。噴出口がそれほど大きくなければ、多孔質 弾性部材が受ける圧力は弱く、浸透速度が遅いので硬化が進む。 その後、注液定着式支保部材本体の先端等の噴出口から注入液がボアホール内 に入り、注液定着式支保部材本体の最も先端寄りの多孔質弾性部材より先端側の 空間が注入液で充填されていく。該空間が注入液で満杯になると最も先端寄りの 多孔質弾性部材に高い圧力が掛かるが、既に、複数の多孔質弾性部材にわたる範 囲が硬化しているので、十分なシールド効果が発揮され、注入液が外部に洩れ出 すことはない。よって、ボアホール内は注入液が満たされた状態で硬化し、所期 の支保強度となるので、従来の如き、使用したパッカーが破れたため漏れ止めを したり、ウエスや急結性セメントを詰めたりしなくて済み、現場作業を簡単に行 える。In addition, in a liquid injection fixing type supporting member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor, a grout tube, etc., which is hollow and has one or a plurality of jet ports at its tip or the like, Provided near the body of the liquid-fixing type supporting member main body are a plurality of porous elastic members mounted so as to wrap around the outer peripheral surface while leaving a gap in the axial direction, and to the liquid-fixing type supporting member main body between the porous elastic members. Drill a spout. As a result, when the injection fixing type support member main body is driven into the ground and then the injection liquid is injected, first, the injection liquid enters the space between the porous elastic members from the jet outlet near the hand, and the porous elastic member is injected. It also penetrates into the members. If the ejection port is not so large, the pressure applied to the porous elastic member is weak and the permeation speed is slow, so hardening proceeds. After that, the injection liquid enters the bore hole from the ejection port such as the tip of the body of the liquid injection fixing type supporting member, and the space on the tip side of the porous elastic member closest to the tip of the body of the liquid fixing fixing type supporting member is filled with the injection liquid. Will be done. When the space is filled with the injection liquid, a high pressure is applied to the porous elastic member closest to the tip, but since the range over the plurality of porous elastic members has already hardened, a sufficient shielding effect is exerted, The injected liquid does not leak outside. Therefore, the inside of the borehole is hardened when it is filled with the injection liquid, and the desired supporting strength is achieved.As a conventional packer used, the packer is broken, so that leakage is prevented and waste cloth or quick-setting cement is filled. There is no need to do it, and on-site work can be performed easily.
【0015】 また、中空で先端等に1または複数の噴出口が設けられたロックボルト、アン カー、グラウト管等の注液定着式支保部材本体を有する注液定着式支保部材にお いて、注液定着式支保部材本体の手元近くに、外周面を包み込むように装着した 1または複数の多孔質弾性部材を設けるとともに、注液定着式支保部材本体の多 孔質弾性部材の装着された箇所に噴出口を穿設する。 これにより、注液定着式支保部材本体を地盤に打ち込んだあと、注入液の注入 を行うと、まず、手元近くの噴出口から各多孔質弾性部材内に注入液が浸透する 。噴出口がそれほど大きくなければ、多孔質弾性部材が受ける圧力は弱く、浸透 速度が遅いので硬化が進む。 その後、注液定着式支保部材本体の先端等の噴出口から注入液がボアホール内 に入り、多孔質弾性部材との間の空間が注入液で充填されていく。該空間が注入 液で満杯になると多孔質弾性部材に高い圧力が掛かるが、既に、多孔質弾性部材 の硬化が或る程度進んでいること、及び、先に多孔質弾性部材に注入液を浸透さ せた噴出口の圧力も高くなって、該多孔質弾性部材を孔壁側に押しつけることか ら十分なシールド効果が発揮され、注入液が外部に洩れ出すことはない。よって 、ボアホール内は注入液が満たされた状態で硬化し、所期の支保強度となるので 、従来の如き、使用したパッカーが破れたため漏れ止めをしたり、ウエスや急結 性セメントを詰めたりしなくて済み、現場作業を簡単に行える。In addition, in a liquid injection fixing type supporting member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor, a grout tube, etc., which is hollow and has one or a plurality of jet ports at its tip or the like, Provide one or more porous elastic members mounted so as to wrap around the outer peripheral surface near the body of the liquid fixing type supporting member main body, and at the place where the multi-hole elastic member of the liquid fixing type supporting member main body is mounted. Drill a spout. As a result, when the injection fixing type support member main body is driven into the ground and then the injection liquid is injected, first, the injection liquid permeates into each porous elastic member from the ejection port near the hand. If the ejection port is not so large, the pressure applied to the porous elastic member will be weak and the permeation rate will be slow, so hardening will proceed. After that, the injection liquid enters the borehole from the ejection port such as the tip of the main body of the injection fixing type support member, and the space between the support member and the porous elastic member is filled with the injection liquid. When the space is filled with the injection liquid, a high pressure is applied to the porous elastic member, but the porosity elastic member has already hardened to some extent, and the injection liquid permeates the porous elastic member first. Since the pressure of the jet outlet is also increased and the porous elastic member is pressed against the hole wall side, a sufficient shielding effect is exhibited, and the injected liquid does not leak outside. Therefore, the inside of the borehole is hardened in a state where it is filled with the injecting liquid, and the desired supporting strength is achieved. There is no need to do it, and on-site work can be performed easily.
【0016】 また、ロックボルト、アンカー、グラウト管等の注液定着式支保部材本体と、 注液定着式支保部材本体の外面に装着した1または複数の注入パイプを有する注 液定着式支保部材において、注液定着式支保部材本体の手元近くに、軸方向に間 隔をあけながら外周面を包み込むように装着した複数の多孔質弾性部材を設ける とともに、少なくとも1つの注入パイプが多孔質弾性部材間に開口した噴出口を 有するようにする。 これにより、注液定着式支保部材本体を地盤に打ち込んだあと、注入パイプを 通して注入液の注入を行うと、まず、手元近くの噴出口から多孔質弾性部材間の 空間に注入液が入り、該多孔質弾性部材内にも浸透する。噴出口がそれほど大き くなければ、多孔質弾性部材が受ける圧力は弱く、浸透速度が遅いので硬化が進 む。 その後、注入パイプの他の噴出口から注入液がボアホール内に入り、注液定着 式支保部材本体の最も先端寄りの多孔質弾性部材より先端側の空間が注入液で充 填されていく。該空間が注入液で満杯になると最も先端寄りの多孔質弾性部材に 高い圧力が掛かるが、既に、複数の多孔質弾性部材にわたる範囲が硬化している ので、十分なシールド効果が発揮され、注入液が外部に洩れ出すことはない。よ って、ボアホール内は注入液が満たされた状態で硬化し、所期の支保強度となる ので、従来の如き、使用したパッカーが破れたため漏れ止めをしたり、ウエスや 急結性セメントを詰めたりしなくて済み、現場作業を簡単に行える。In addition, in a liquid injection fixing type supporting member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor and a grout pipe, and one or a plurality of injection pipes attached to an outer surface of the liquid injection fixing type supporting member main body. In the vicinity of the body of the liquid injection fixing type supporting member, a plurality of porous elastic members mounted so as to wrap around the outer peripheral surface while providing a gap in the axial direction are provided, and at least one injection pipe is provided between the porous elastic members. There should be a spout that is open at. As a result, when the body of the liquid injection fixing type supporting member is driven into the ground and then the liquid is injected through the injection pipe, first, the liquid enters the space between the porous elastic members from the ejection port near the hand. , Penetrates into the porous elastic member. If the ejection port is not so large, the pressure applied to the porous elastic member will be weak and the permeation speed will be slow, so hardening will proceed. After that, the injection liquid enters the borehole from the other ejection port of the injection pipe, and the space on the tip side of the porous elastic member closest to the tip of the injection fixing type supporting member body is filled with the injection liquid. When the space is filled with the injection liquid, a high pressure is applied to the porous elastic member closest to the tip, but since the range over multiple porous elastic members has already been hardened, a sufficient shielding effect is exerted and injection is performed. The liquid does not leak outside. As a result, the inside of the borehole is hardened with the injection liquid filled, and the desired support strength is achieved.Therefore, as in the conventional case, the used packer broke, so leakage was prevented and waste cloth and quick-setting cement were used. You don't have to pack it, and you can easily perform on-site work.
【0017】 また、ロックボルト、アンカー、グラウト管等の注液定着式支保部材本体と、 注液定着式支保部材本体の外面に装着した1または複数の注入パイプを有する注 液定着式支保部材において、注液定着式支保部材本体の手元近くに、外周面を包 み込むように装着した1または複数の多孔質弾性部材を設けるとともに、少なく とも1つの注入パイプが多孔質弾性部材の装着された箇所に開口した噴出口を有 するようにする。 これにより、注液定着式支保部材本体を地盤に打ち込んだあと、注入パイプを 通して注入液の注入を行うと、まず、手元近くの噴出口から各多孔質弾性部材内 に注入液が浸透する。噴出口がそれほど大きくなければ、多孔質弾性部材が受け る圧力は弱く、浸透速度が遅いので硬化が進む。 その後、注入パイプの他の噴出口から注入液がボアホール内に入り、多孔質弾 性部材との間の空間が注入液で充填されていく。該空間が注入液で満杯になると 多孔質弾性部材に高い圧力が掛かるが、既に、多孔質弾性部材の硬化が或る程度 進んでいること、及び、先に多孔質弾性部材に注入液を浸透させた噴出口の圧力 も高くなって、該多孔質弾性部材を孔壁側に押しつけることから十分なシールド 効果が発揮され、注入液が外部に洩れ出すことはない。よって、ボアホール内は 注入液が満たされた状態で硬化し、所期の支保強度となるので、従来の如き、使 用したパッカーが破れたため漏れ止めをしたり、ウエスや急結性セメントを詰め たりしなくて済み、現場作業を簡単に行える。Further, in a liquid injection fixing type supporting member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor, a grout pipe, etc., and one or a plurality of injection pipes attached to an outer surface of the liquid injection fixing type supporting member main body. , One or more porous elastic members mounted so as to wrap around the outer peripheral surface were provided near the body of the liquid injection fixing type supporting member main body, and at least one injection pipe was mounted with the porous elastic member. There should be a jet outlet that opens at the location. As a result, when the body of the liquid injection fixing type supporting member is driven into the ground and then the liquid is injected through the injection pipe, first the liquid permeates into each porous elastic member from the jet outlet near the hand. . If the ejection port is not so large, the pressure received by the porous elastic member is weak and the permeation rate is slow, so hardening proceeds. After that, the injection liquid enters the borehole from the other ejection port of the injection pipe, and the space between the injection hole and the porous elastic member is filled with the injection liquid. When the space is filled with the injection liquid, a high pressure is applied to the porous elastic member, but the hardening of the porous elastic member has already progressed to some extent, and the injection liquid permeates into the porous elastic member first. Since the pressure of the ejected port is also increased and the porous elastic member is pressed against the hole wall side, a sufficient shielding effect is exhibited and the injected liquid does not leak outside. Therefore, the inside of the borehole is hardened with the injection liquid filled, and the desired supporting strength is achieved, so that the used packer broke and the leak was prevented and the waste cloth and quick-setting cement were packed. There is no need to worry, and on-site work can be done easily.
【0018】[0018]
図1は本考案の第1実施例に係わる注液定着式支保部材の外観斜視図である。 図1は岩盤に予め、穿設したボアホールに挿入するタイプで、注入パイプ不要の ロックボルトを注液定着式支保部材本体としたものである。 図1において、30は注液定着式支保部材本体の一例としての中空のロックボ ルトであり、注入液を手元側から内部を通して先端及び先端近くに設けた噴出口 32、34よりボアホール内に圧入するようになっている。 36〜40はロックボルト30の手元側(ボアホールの口元側に相当)に、軸 方向に所定間隔離して外周面を包み込むようにして接着された、所定長さで所定 厚さの3つの多孔質弾性部材である。これらの多孔質弾性部材36〜40は、例 えば、通常のスポンジ材(連続気泡体)で良いが、吸水膨張性を合わせ持つ部材 であっても良い。多孔質弾性部材36〜40の厚さは、ロックボルト30に接着 した段階での外径がボアホールの孔径より少し大きくなるようにしてある。 FIG. 1 is an external perspective view of a liquid injection fixing type supporting member according to a first embodiment of the present invention. Fig. 1 is a type that is inserted into a bore hole that has been drilled in advance in a rock bed, and uses a lock bolt that does not require an injection pipe as the main body of the liquid injection fixing type support member. In FIG. 1, reference numeral 30 denotes a hollow lock bolt as an example of a main body of a liquid injection fixing type supporting member, through which injection liquid is press-fitted into the bore hole from the jet side 32, 34 provided through the inside through the tip and near the tip. It is like this. Numerals 36 to 40 are three porous bodies of a predetermined length and a predetermined thickness, which are adhered to the proximal side of the lock bolt 30 (corresponding to the mouth side of the borehole) so as to wrap the outer peripheral surface while being separated by a predetermined interval in the axial direction. It is an elastic member. These porous elastic members 36 to 40 may be, for example, ordinary sponge materials (open cells), but may also be members having water-swelling expansibility. The thickness of the porous elastic members 36 to 40 is such that the outer diameter of the porous elastic members 36 to 40 when bonded to the lock bolt 30 is slightly larger than the hole diameter of the bore hole.
【0019】 多孔質弾性部材36〜40のロックボルト30への装着は、図2に示す如く、 予め、円筒形に形成したものをロックボルト30に嵌め込むようにしたり、角形 のものをロックボルト30に巻きつけるようにすればよい。 ロックボルト30、多孔質弾性部材36〜40により注液定着式支保部材42 が構成されている。As shown in FIG. 2, the porous elastic members 36 to 40 are attached to the lock bolt 30 by previously inserting a cylindrical shape into the lock bolt 30 or by inserting a square shape into the lock bolt 30. It should be wrapped around 30. The lock bolt 30 and the porous elastic members 36 to 40 constitute a liquid injection fixing type supporting member 42.
【0020】 図3と図4は本実施例の使用状態説明図である。 地山10に掘削したトンネル12の内壁14から該内壁14に対し垂直に岩盤 内部へ所定深さのボアホール16を穿孔する(図3(1)参照)。 次いで、ロックボルト30と多孔質弾性部材36〜40を一体化した注液定着 式支保部材42を、ボアホール16に挿入し、打ち込む(図3(2)参照)。こ の際、多孔質弾性部材36〜40が孔壁から受ける外力で容易に圧縮されるので 、挿入、打ち込みの妨げになることはない。注液定着式支保部材42の挿入、打 ち込みが終われば、弾性復元力でボアホール16とロックボルト30の間の隙間 が多孔質弾性部材36〜40により比較的緩やかにシールドされる。注液定着式 支保部材42の挿入、打ち込みに際し、多孔質弾性部材36〜40のいずれか1 つが孔壁で一部破損したり、打ち込み完了後、孔壁から突き出た岩等に当たり凹 んだとしても、他の多孔質弾性部材が孔壁に密接することでシールド性が確保さ れる。FIG. 3 and FIG. 4 are explanatory views of the usage state of this embodiment. A borehole 16 having a predetermined depth is bored from the inner wall 14 of the tunnel 12 excavated in the natural ground 10 to the inside of the rock perpendicularly to the inner wall 14 (see FIG. 3 (1)). Next, the liquid injection fixing type supporting member 42 in which the lock bolt 30 and the porous elastic members 36 to 40 are integrated is inserted into the bore hole 16 and driven therein (see FIG. 3 (2)). At this time, since the porous elastic members 36 to 40 are easily compressed by the external force received from the hole wall, they do not hinder the insertion and the driving. When the injection fixing support member 42 is inserted and hammered in, the elastic restoring force causes the gap between the bore hole 16 and the lock bolt 30 to be shielded relatively gently by the porous elastic members 36-40. When inserting or driving the liquid injection fixing type supporting member 42, it is considered that any one of the porous elastic members 36 to 40 is partially damaged by the hole wall or is dented against rocks protruding from the hole wall after the driving is completed. However, since the other porous elastic member is in close contact with the hole wall, the shielding property is secured.
【0021】 この後、ロックボルト30の手元側から注入液(モルタル、定着剤、地山改良 材等で、ここでは比較的ゲルタイム(硬化時間;30〜70秒程度)の短いもの とする)を注入すると、まず、先端等の噴出口32、34からボアホール内に出 て、該ボアホール16とロックボルト30の間で、最も先端寄りの多孔質弾性部 材36より先端側の第1空間Aに充填されていき、地山10の地質が浸透性を有 していれば一部が地盤中に浸透する(図3(3)参照)。After that, an injection liquid (a mortar, a fixing agent, a ground improvement material, etc., which has a relatively short gel time (curing time: about 30 to 70 seconds) here) is supplied from the near side of the lock bolt 30. When injected, it first comes out from the ejection ports 32, 34 such as the tip into the bore hole, and between the bore hole 16 and the lock bolt 30, into the first space A closer to the tip than the porous elastic member 36 closest to the tip. If it is filled and the geology of the natural ground 10 is permeable, part of it will penetrate into the ground (see Fig. 3 (3)).
【0022】 第1空間Aがまだ注入液で満杯となっていない間は、最も先端寄りの多孔質弾 性部材36には第1空間Aの注入液より比較的弱い初期圧力が掛かるだけなので 、多孔質弾性部材36のシールド作用の方が勝り、第1空間Aに大部分の注入液 が滞留し、一部が多孔質弾性部材36に浸透するだけである。但し、多孔質弾性 部材36から抵抗を受けるので当初の浸透速度は遅く、第1空間Aに対する注入 液の充填が進行する(図4(1)参照)。While the first space A is not yet filled with the injection liquid, a relatively weak initial pressure is applied to the porous elastic member 36 closest to the tip, which is relatively weaker than that of the injection liquid in the first space A. The shield action of the porous elastic member 36 is superior, most of the injected liquid is retained in the first space A, and only a part thereof penetrates into the porous elastic member 36. However, since the resistance is received from the porous elastic member 36, the initial permeation rate is slow and the filling of the injection liquid into the first space A proceeds (see FIG. 4 (1)).
【0023】 その後、第1空間Aに注入液が満杯となり圧力が高まったとき、多孔質弾性部 材36内に注入液が目詰まり状態で入っていること、及び、或る程度硬化が進ん でいることから、多孔質弾性部材36の耐圧性が高くなっており、注入液が一気 に外部に洩れ出ることはなく、多孔質弾性部材36内で完全に硬化していないと きに、一部が最も先端寄りと2番目に先端寄りの多孔質弾性部材36と38の間 の第2空間Bに徐々に洩れ出て、2番目の多孔質弾性部材38に浸透するように なるだけである(図4(2)参照)。After that, when the injection liquid is filled in the first space A and the pressure is increased, the injection liquid is clogged in the porous elastic member 36, and the curing is advanced to some extent. Therefore, the pressure resistance of the porous elastic member 36 is high, the injected liquid does not leak to the outside at once, and if the inside of the porous elastic member 36 is not completely cured, some Is gradually leaked into the second space B between the porous elastic members 36 and 38 closest to the tip and the second tip, and permeates into the second porous elastic member 38 ( See FIG. 4 (2).
【0024】 第2空間Bでの注入液の圧力は第1空間Aより遙かに弱くなっており、多孔質 弾性部材38の中への浸透速度はかなり遅いので、該多孔質弾性部材38の中や 第2空間Bで注入液の硬化が進む。完全に硬化すれば、大きな耐圧性が生じて第 2空間の注入液が外部に洩れ出ることはなくなり、これに伴い、多孔質弾性部材 36内への注入液の浸透も止まり、該多孔質弾性部材36も硬化して大きな耐圧 性を発揮するので、第1空間A内を確実に注入液で満たしかつ滞留、硬化させる ことができる。Since the pressure of the injecting liquid in the second space B is much weaker than that in the first space A, and the permeation rate into the porous elastic member 38 is considerably slow, the porous elastic member 38 has a low pressure. The curing of the injecting liquid proceeds in the middle and the second space B. When completely cured, a large pressure resistance is generated and the injected liquid in the second space does not leak to the outside. Along with this, permeation of the injected liquid into the porous elastic member 36 is stopped and the porous elastic Since the member 36 also hardens and exhibits a large pressure resistance, it is possible to reliably fill the first space A with the injection liquid and retain and harden it.
【0025】 なお、2番目に先端寄りの多孔質弾性部材38の中で注入液が硬化する前に、 第2空間Bが注入液で満たされて圧力が高まったことで、多孔質弾性部材38よ り手元側の第3空間Cに洩れ出てきたとしても最早少量であり、3番目の多孔質 弾性部材40への浸透、硬化で注入液の外部への洩れ出しは阻止される(図4( 3)参照)。It should be noted that the second space B was filled with the injecting liquid and the pressure was increased before the injecting liquid was hardened in the second porous elastic member 38 near the tip, so that the porous elastic member 38 was formed. Therefore, even if it leaks into the third space C on the near side, the amount is no longer small, and the third liquid penetrates into the porous elastic member 40 and is hardened to prevent the infused liquid from leaking to the outside (Fig. 4). (See (3)).
【0026】 所定量の注入液を注入すれば作業完了であり、注入液の注入を止める。その後 、ボアホール16内の注入液全体が硬化すれば、ロックボルト30とトンネルの 内壁周辺が一体的に固着し、ロックボルト先端部の打ち込まれた固い内部岩盤に 支えられることで、内壁周辺の崩落が防止される。When a predetermined amount of the injection liquid is injected, the work is completed, and the injection of the injection liquid is stopped. After that, when the entire injected liquid in the borehole 16 hardens, the lock bolt 30 and the periphery of the inner wall of the tunnel are integrally fixed, and the rock bolt 30 is supported by the hard internal rock mass at the tip of the rock bolt, causing the inner wall to collapse. Is prevented.
【0027】 この第1実施例によれば、ロックボルト30の手元近くに装着した複数の多孔 質弾性部材36、38、40により注入液のシールドを確実に行うことができる ので、注入作業中、注入液が外部に洩れて、ロックボルト30とボアホール16 の間の隙間に注入液の充填不良が生じるようなことはなく、よって、従来の如き 、パッカーを何らかの方法で膨らませたり、パッカーが破れた場合の洩れ止めを したりしなくて済み、現場での作業負担が大幅に軽減する。According to the first embodiment, since the pouring liquid can be reliably shielded by the plurality of porous elastic members 36, 38, 40 mounted near the lock bolt 30, the pouring liquid can be securely The injected liquid does not leak to the outside and the gap between the lock bolt 30 and the bore hole 16 does not cause defective filling of the injected liquid. Therefore, as in the conventional case, the packer is inflated by some method or the packer is broken. In this case, there is no need to prevent leaks and the work load on site is greatly reduced.
【0028】 なお、多孔質弾性部材36〜40は、接着でロックボルト30に装着するほか 、両端部分でテープ巻きすることで装着するようにしてもよい。 また、多孔質弾性部材は2つだけ設けたり、4つ以上設けるようにしてもよい 。 また、ロックボルトが中実で注入パイプを用いて注入液をボアホール内に注入 するタイプの場合、図5に示す如く、ロックボルト30Aに注入パイプ44と、 必要な排気パイプ46とをテープ等で装着した上に、複数の多孔質弾性部材36 〜40を装着して注液定着式支保部材42Aを構成するようにすればよい。なお 、注入パイプ44、必要な排気パイプ46の所で、ロックボルト30Aと多孔質 弾性部材36〜40の間に生じる隙間は、図6に示す如く充填材48で充填して おけばよい。The porous elastic members 36 to 40 may be attached to the lock bolt 30 by adhesion, or may be attached by winding tape at both ends. Further, only two porous elastic members may be provided, or four or more may be provided. Further, in the case of the type in which the lock bolt is solid and the injection liquid is injected into the borehole using the injection pipe, as shown in FIG. 5, the injection pipe 44 and the necessary exhaust pipe 46 are attached to the lock bolt 30A by tape or the like. The liquid injection fixing type supporting member 42A may be configured by mounting the plurality of porous elastic members 36 to 40 on top of the mounting. It should be noted that the gap generated between the lock bolt 30A and the porous elastic members 36 to 40 at the injection pipe 44 and the necessary exhaust pipe 46 may be filled with a filler 48 as shown in FIG.
【0029】 更に、自身を回転させながら先端のビットでボアホールを穿孔していく自穿孔 式のロックボルトの場合、図7(1)に示す如く、自穿孔ロックボルト30Bの 手元近くに装着した多孔質弾性部材36〜40に対し、これら多孔質弾性部材3 6〜40を少し圧縮させた状態で、剛性有る薄肉鋼管やプラスチックパイプ等か ら成るカラー50を着脱自在に被嵌して注液定着式支保部材42Bを構成してお く。カラー50は、ボアホールの孔径より少しだけ小さい径とし、穿孔作業の妨 げにならないようにしてある。多孔質弾性部材36〜40に被せたカラー50は 外力を加えて引き抜くことで、簡単に取り外すことができる。Further, in the case of a self-drilling type rock bolt in which the bore hole is drilled with the bit at the tip while rotating itself, as shown in FIG. 7 (1), a multi-hole type bolt mounted near the self-drilling lock bolt 30B. The porous elastic members 36 to 40 are slightly compressed with respect to the elastic members 36 to 40, and a collar 50 made of a rigid thin-walled steel pipe or a plastic pipe is detachably fitted to the liquid elastic fixing member 36 to 40. The formula support member 42B should be configured. The collar 50 has a diameter slightly smaller than the diameter of the borehole so as not to hinder the drilling work. The collar 50 covering the porous elastic members 36 to 40 can be easily removed by pulling it out by applying an external force.
【0030】 そして、多孔質弾性部材36〜40、カラー50を装着した自穿孔ロックボル ト30Bを、アダプタ52を介して穿岩機54で回転させ、該自穿孔ロックボル ト30Bの先端に装着したビット56で岩盤を掘削させながら所定深さまで打ち 込んでいく(図7(1)参照)。 この際、多孔質弾性部材36〜40がビット56で穿孔されるボアホール16 の孔径より外径が小さく強度有るカラー50で保護されているので、打ち込み作 業の妨げになることはなく、また、多孔質弾性部材36〜40が破損することも ない。また、カラー50はアダプタ52に押されるので、自穿孔ロックボルト3 0Bを岩盤に打ち込んでも該カラー50が多孔質弾性部材36〜40から抜ける ことはない。Then, the self-drilling lock bolt 30B equipped with the porous elastic members 36 to 40 and the collar 50 is rotated by the rock drill 54 via the adapter 52, and the bit is fitted to the tip of the self-drilling lock bolt 30B. While excavating the bedrock at 56, it is driven to a predetermined depth (see Fig. 7 (1)). At this time, since the porous elastic members 36 to 40 are protected by the collar 50 having a smaller outer diameter than the bore hole 16 drilled by the bit 56 and having strength, it does not hinder the driving operation, and The porous elastic members 36-40 are not damaged. Further, since the collar 50 is pushed by the adapter 52, even if the self-drilling lock bolt 30B is driven into the rock, the collar 50 will not come off from the porous elastic members 36-40.
【0031】 自穿孔ロックボルト30Bの打ち込みが完了したならば、アダプタ52、カラ ー50を取り外す(図7(2)、(3)参照)。すると、多孔質弾性部材36〜 40が弾性復元し、ボアホール16の口元付近における該ボアホール16と自穿 孔ロックボルト30Bの間の隙間を緩くシーリングすることができる。自穿孔ロ ックボルト30Bを打ち込む際、多孔質弾性部材36〜40にカラー50を被せ てあったことから、これら多孔質弾性部材36〜40に傷みが生じず、隙間を確 実に塞ぐことができる。When the driving of the self-drilling lock bolt 30B is completed, the adapter 52 and the color 50 are removed (see FIGS. 7 (2) and 7 (3)). Then, the porous elastic members 36 to 40 are elastically restored, and the gap between the bore hole 16 and the self-drilling lock bolt 30B near the mouth of the bore hole 16 can be loosely sealed. Since the porous elastic members 36 to 40 are covered with the collar 50 when the self-drilling rock bolt 30B is driven, the porous elastic members 36 to 40 are not damaged and the gap can be closed with certainty.
【0032】 この後、自穿孔ロックボルト30Bの中空内部を通して、注入液を圧入すれば (図7(4)参照)、前述した第1実施例と同様にして、確実に注入液をボアホ ール16内に充填し、滞留、硬化させて所期の支保強度を実現することができる 。 なお、注液定着式支保部材本体として自穿孔ロックボルトを使用する場合、必 ずしもカラーは用いなくてもよい。After that, if the injection liquid is press-fitted through the hollow inside of the self-drilling lock bolt 30B (see FIG. 7 (4)), the injection liquid is surely injected into the borehole in the same manner as in the first embodiment described above. The desired supporting strength can be realized by filling the inside of 16, filling and stagnating. When the self-drilling lock bolt is used as the liquid injection fixing type supporting member main body, the collar does not necessarily have to be used.
【0033】 図8は本考案に係る第2実施例の使用状態説明図であり、図1と同一の構成部 分には同一の符号が付してある。 図8の注液定着式支保部材42Cでは、ロックボルト30の内、多孔質弾性部 材36と38の間、及び、多孔質弾性部材38と40の間に相当する箇所にも噴 出口58、60が穿設してある。FIG. 8 is an explanatory view of a use state of the second embodiment according to the present invention, in which the same components as those in FIG. 1 are designated by the same reference numerals. In the liquid injection fixing type supporting member 42C of FIG. 8, the jet port 58 is provided in the lock bolt 30, between the porous elastic members 36 and 38, and between the porous elastic members 38 and 40. 60 is drilled.
【0034】 次に、第2実施例における注液定着式支保部材42Cの使用状態を説明する。 注液定着式支保部材42Cの挿入、打ち込みが終わると、弾性復元力でボアホ ール16とロックボルト30の間の隙間が多孔質弾性部材36〜40により比較 的緩やかにシールドされる(図8(1)参照)。 この後、ロックボルト30の手元側から32より注入液を注入すると、まず、 噴出口58、60から多孔質弾性部材36と38の間の第3空間C、多孔質弾性 部材38と40の間の第2空間Bに注入液が入り、多孔質弾性部材36〜40内 にも浸透する。噴出口58、60がそれほど大きくなければ、各多孔質弾性部材 36〜40が受ける圧力は弱く、浸透速度が遅いので硬化が進む(図8(2)参 照)。Next, a usage state of the liquid injection fixing type supporting member 42C in the second embodiment will be described. When the injection fixing support member 42C is inserted and driven in, the gap between the borehole 16 and the lock bolt 30 is relatively gently shielded by the porous elastic members 36 to 40 due to the elastic restoring force (see FIG. 8). (See (1)). After that, when the injection liquid is injected from the proximal side of the lock bolt 30 from 32, first, the third space C between the porous elastic members 36 and 38 and the space between the porous elastic members 38 and 40 from the ejection ports 58 and 60. The injecting liquid enters the second space B and penetrates into the porous elastic members 36 to 40. If the ejection ports 58 and 60 are not so large, the pressure applied to each of the porous elastic members 36 to 40 is weak and the permeation rate is slow, so that the curing proceeds (see FIG. 8 (2)).
【0035】 その後、ロックボルト30の先端等の噴出口32、34から注入液がボアホー ル16内に入り、ボアホール16とロックボルト30の間で最も先端寄りの多孔 質弾性部材36より先端側の第1空間Aが注入液で充填されていく(図8(3) 参照)。該第1空間Aが注入液で満杯になると多孔質弾性部材36に高い圧力が 掛かるが、既に、複数の多孔質弾性部材36〜40にわたる範囲が硬化している ので、十分なシールド効果が発揮され、注入液が外部に洩れ出すことはなく、第 1空間A内を確実に注入液で満たしかつ滞留、硬化させることができる。After that, the injection liquid enters the borehole 16 through the ejection ports 32, 34 such as the tip of the lock bolt 30, and the tip end side of the porous elastic member 36 located closest to the tip between the bore hole 16 and the lock bolt 30. The first space A is filled with the injection liquid (see FIG. 8 (3)). When the first space A is filled with the injection liquid, a high pressure is applied to the porous elastic member 36, but since the range extending over the plurality of porous elastic members 36 to 40 has already been hardened, a sufficient shielding effect is exerted. As a result, the injected liquid does not leak outside, and the first space A can be reliably filled with the injected liquid and retained and cured.
【0036】 所定量の注入液を注入すれば作業完了であり、注入液の注入を止める。その後 、ボアホール16内の注入液全体が硬化すれば、ロックボルト30とトンネルの 内壁周辺が一体的に固着し、ロックボルト先端部の打ち込まれた固い内部岩盤に 支えられることで、内壁周辺の崩落が防止される。The work is completed when a predetermined amount of the injection liquid is injected, and the injection of the injection liquid is stopped. After that, when the entire injected liquid in the borehole 16 hardens, the lock bolt 30 and the periphery of the inner wall of the tunnel are integrally fixed, and the rock bolt 30 is supported by the hard internal rock mass at the tip of the rock bolt, causing the inner wall to collapse. Is prevented.
【0037】 この第2実施例によっても、ロックボルト30の手元近くに装着した複数の多 孔質弾性部材36、38、40により注入液のシールドを確実に行うことができ るので、注入作業中、注入液が外部に洩れて、ロックボルト30とボアホール1 6の間の隙間に注入液の充填不良が生じるようなことはなく、よって、従来の如 き、パッカーを何らかの方法で膨らませたり、パッカーが破れた場合の洩れ止め をしたりしなくて済み、現場での作業負担が大幅に軽減する。 なお、多孔質弾性部材間に設ける噴出口は、各第2,第3空間B,Cのいずれ も、1個としても複数個としてもよい。Also according to the second embodiment, the injection liquid can be surely shielded by the plurality of multi-hole elastic members 36, 38, 40 mounted near the lock bolt 30, so that the injection work can be performed. In addition, the injected liquid does not leak to the outside and the gap between the lock bolt 30 and the borehole 16 does not cause defective filling of the injected liquid. Therefore, as in the conventional case, the packer is inflated by some method or the packer is not used. There is no need to prevent leaks when the torn parts are broken, which greatly reduces the work load on site. It should be noted that each of the second and third spaces B and C may be provided with one or more ejection ports provided between the porous elastic members.
【0038】 また、注入パイプを用いて注入液の注入を行う場合は、図9に示す如く、注入 パイプ44の内、多孔質弾性部材36と38の間と、多孔質弾性部材38と40 の間に相当する箇所に噴出口62、64を設けるようにしたり、図10に示す如 く、注入パイプ44とは別に設けた注入パイプ440の内、多孔質弾性部材36 と38の間と、多孔質弾性部材38と40の間に相当する箇所に噴出口62、6 4を設けるようにすれば、図8の第2実施例と同様にして、第1空間(図8のA 参照)より時間的に先に多孔質弾性部材36〜40の範囲が硬化し、第1空間に 満杯となった注入液を確実に滞留、硬化させることができる。When the injection liquid is injected using the injection pipe, as shown in FIG. 9, in the injection pipe 44, between the porous elastic members 36 and 38 and between the porous elastic members 38 and 40. The injection ports 62 and 64 may be provided at positions corresponding to the space between the porous elastic members 36 and 38, and the inside of the injection pipe 440 provided separately from the injection pipe 44 as shown in FIG. If the ejection ports 62 and 64 are provided at the corresponding positions between the elastic materials 38 and 40, the time from the first space (see A in FIG. 8) can be increased similarly to the second embodiment in FIG. First, the range of the porous elastic members 36 to 40 is hardened first, so that the filling liquid filled in the first space can be reliably retained and hardened.
【0039】 図11は本考案に係る第3実施例の使用状態説明図であり、図1と同一の構成 部分には同一の符号が付してある。 図11の注液定着式支保部材42Dでは、ロックボルト30の内、多孔質弾性 部材36、38、40に相当する箇所に噴出口66、68、70が穿設してある 。FIG. 11 is an explanatory view of a usage state of the third embodiment according to the present invention, in which the same components as those in FIG. 1 are designated by the same reference numerals. In the liquid injection fixing type supporting member 42D shown in FIG. 11, jet ports 66, 68, 70 are formed in the lock bolt 30 at positions corresponding to the porous elastic members 36, 38, 40.
【0040】 図11を参照して注液定着式支保部材42Dの使用状態を説明する。 注液定着式支保部材42Dの挿入、打ち込みが終わると、弾性復元力でボアホ ール16とロックボルト30の間の隙間が多孔質弾性部材36〜40により比較 的緩やかにシールドされる(図11(1)参照)。 この後、ロックボルト30の手元側から注入液を注入すると、まず、手元近く の噴出口66〜70から各多孔質弾性部材36〜40内に注入液が浸透する。噴 出口66〜70がそれほど大きくなければ、多孔質弾性部材36〜40が受ける 圧力は弱く、浸透速度が遅いので硬化が進む(図11(2)参照)。The usage state of the liquid injection fixing type supporting member 42D will be described with reference to FIG. When the injection fixing support member 42D is inserted and driven in, the gap between the borehole 16 and the lock bolt 30 is relatively gently shielded by the porous elastic members 36 to 40 due to the elastic restoring force (FIG. 11). (See (1)). After that, when the injection liquid is injected from the proximal side of the lock bolt 30, first, the injection liquid permeates into the porous elastic members 36 to 40 from the ejection ports 66 to 70 near the proximal side. If the ejection ports 66 to 70 are not so large, the pressure applied to the porous elastic members 36 to 40 is weak and the permeation speed is slow, so that the curing proceeds (see FIG. 11 (2)).
【0041】 その後、ロックボルト30の先端等の噴出口32、34から注入液がボアホー ル16内に入り、最も先端寄りの多孔質弾性部材36との間の第1空間Aが注入 液で充填されていく(図11(3)参照)。 第1空間Aが注入液で満杯になると多孔質弾性部材36に高い圧力が掛かるが 、既に、各多孔質弾性部材36〜40の硬化が或る程度進んでいること、及び、 先に多孔質弾性部材36〜40に注入液を浸透させた噴出口66〜70の圧力も 高くなって、該多孔質弾性部材36〜40を孔壁側に押しつけることから十分な シールド効果が発揮され、注入液が外部に洩れ出すことはない。よって、ボアホ ール16内は注入液が満たされた状態で滞留、硬化する。After that, the injection liquid enters the borehole 16 from the ejection ports 32, 34 such as the tip of the lock bolt 30, and the first space A between the porous elastic member 36 and the tip closest to the tip is filled with the injection liquid. (See FIG. 11 (3)). When the first space A is filled with the injection liquid, a high pressure is applied to the porous elastic members 36, but the hardening of each of the porous elastic members 36 to 40 has already progressed to some extent, and The pressure of the ejection ports 66 to 70 infiltrated with the injection liquid in the elastic members 36 to 40 is also increased, and the porous elastic members 36 to 40 are pressed against the hole wall side, so that a sufficient shielding effect is exerted and the injection liquid is injected. Does not leak outside. Therefore, the inside of the borehole 16 is retained and hardened in a state of being filled with the injection liquid.
【0042】 所定量の注入液を注入すれば作業完了であり、注入液の注入を止める。その後 、ボアホール16内の注入液全体が硬化すれば、ロックボルト30とトンネルの 内壁周辺が一体的に固着し、ロックボルト先端部の打ち込まれた固い内部岩盤に 支えられることで、内壁周辺の崩落が防止される。When a predetermined amount of the injection liquid is injected, the work is completed, and the injection of the injection liquid is stopped. After that, when the entire injected liquid in the borehole 16 hardens, the lock bolt 30 and the periphery of the inner wall of the tunnel are integrally fixed, and the rock bolt 30 is supported by the hard internal rock mass at the tip of the rock bolt, causing the inner wall to collapse. Is prevented.
【0043】 この第3実施例によっても、ロックボルト30の手元近くに装着した複数の多 孔質弾性部材36、38、40により注入液のシールドを確実に行うことができ るので、注入作業中、注入液が外部に洩れて、ロックボルト30とボアホール1 6の間の隙間に注入液の充填不良が生じるようなことはなく、よって、従来の如 き、パッカーを何らかの方法で膨らませたり、パッカーが破れた場合の洩れ止め をしたりしなくて済み、現場での作業負担が大幅に軽減する。 なお、多孔質弾性部材の位置に設ける噴出口は、1つの多孔質弾性部材に対し 1個としても、複数個としてもよい。Also according to the third embodiment, the injecting liquid can be reliably shielded by the plurality of multi-hole elastic members 36, 38, 40 mounted near the lock bolt 30. In addition, the injected liquid does not leak to the outside and the gap between the lock bolt 30 and the borehole 16 does not cause defective filling of the injected liquid. Therefore, as in the conventional case, the packer is inflated by some method or the packer is not used. There is no need to prevent leaks when the torn parts are broken, which greatly reduces the work load on site. The number of ejection ports provided at the position of the porous elastic member may be one or plural per one porous elastic member.
【0044】 また、注入パイプを用いて注入液の注入を行う場合は、図12に示す如く、注 入パイプ44の内、多孔質弾性部材36〜40に相当する箇所に噴出口72〜7 6を設けるようにしたり、図13に示す如く、注入パイプ44とは別に設けた注 入パイプ440の内、多孔質弾性部材36〜40に相当する箇所に噴出口72〜 76を設けるようにすれば、図11の第3実施例と同様にして、第1空間(図1 1のA参照)より時間的に先に多孔質弾性部材36〜40の範囲が硬化し、第1 空間に満杯となった注入液を確実に滞留、硬化させることができる。When the injection liquid is injected using the injection pipe, as shown in FIG. 12, the injection ports 72 to 76 are provided in the injection pipe 44 at positions corresponding to the porous elastic members 36 to 40. 13 or, as shown in FIG. 13, if the injection pipes 440 provided separately from the injection pipe 44 are provided with the ejection ports 72 to 76 at positions corresponding to the porous elastic members 36 to 40. Similarly to the third embodiment of FIG. 11, the range of the porous elastic members 36 to 40 is hardened before the first space (see A of FIG. 11), and the first space is filled. The injected liquid can be reliably retained and cured.
【0045】 また、第2実施例と第3実施例を組み合わせ、ロックボルト(図14参照)ま たは注入ハイプ(図示せず)の内、各多孔質弾性部材36〜40の間に相当する 箇所と、各多孔質弾性部材36、38、40の位置の両方に相当する箇所に噴出 口58、60、66〜70を設けるようにしてもよい。 また、上記した各実施例及び変形例では、多孔質弾性部材を3つ設けるように したが、第1,第2実施例とその変形例では、2つまたは4つ以上としてもよく 、また、第3実施例とその変形例では1つ、2つまたは4つ以上としてもよい。Further, the second embodiment and the third embodiment are combined to correspond to the space between the porous elastic members 36 to 40 of the lock bolt (see FIG. 14) or the injection hype (not shown). The ejection ports 58, 60, 66 to 70 may be provided at locations corresponding to both the location and the locations of the respective porous elastic members 36, 38, 40. Further, in each of the above-described embodiments and modifications, three porous elastic members are provided, but in the first and second embodiments and their modifications, two or four or more may be provided. In the third embodiment and its modification, the number may be one, two, or four or more.
【0046】 更に、各実施例及び変形例では、ナトム工法によるトンネル工事等で使用する ロックボルトを例に挙げたが、擁壁工事等に使用するアンカー、地山改良工事や 地盤補強工事等に使用するグラウト管等、他の種類の注液定着式支保部材本体に も同様に適用することができる。Further, in each of the embodiments and the modifications, the lock bolt used in the tunnel construction by the NATOM method etc. is taken as an example, but it is used in the anchor used in the retaining wall construction etc., the ground improvement construction and the ground reinforcement construction etc. The same can be applied to other types of liquid injection fixing type supporting member bodies such as grout tubes used.
【0047】[0047]
以上本考案によれば、注液定着式支保部材本体の手元近くに、軸方向に間隔を あけながら外周面を包み込むように装着した複数の多孔質弾性部材を設けたので 、注液定着式支保部材を地盤に打ち込むと、多孔質弾性部材が圧縮され、弾性復 元力でボアホールと注液定着式支保部材本体の間の隙間が緩やかにシーリングさ れる。この状態で、注液定着式支保部材本体内を通したり、注入パイプを通した りしてボアホール内に注入液を注入すると、注液定着式支保部材本体とボアホー ルの間で、最も先端寄りの多孔質弾性部材から見て先端側の第1空間に注入液が 充填されていき、一部は地盤に浸透する。 そして、注入液から弱い初期圧力を受けて、最も先端寄りの多孔質弾性部材の 中に注入液が浸透するが、多孔質弾性部材から抵抗を受けるので当初の浸透速度 は遅い。その後、第1空間に注入液が満杯となり圧力が高まったとき、多孔質弾 性部材内に注入液が目詰まり状態で入っていること、及び、或る程度硬化が進ん でいることから、耐圧性が高くなっており、注入液が一気に外部に洩れ出ること はなく、多孔質弾性部材内で完全に硬化していないときに、一部が最も先端寄り と2番目に先端寄りの多孔質弾性部材の間の第2空間に徐々に洩れ出て、該2番 目に先端に近い多孔質弾性部材に浸透するだけである。 第2空間での圧力は第1空間より遙かに弱くなり、2番目に先端寄りの多孔質 弾性部材の中への浸透速度はかなり遅いので、第2空間で滞留、硬化が進み、ま た、2番目に先端寄りの多孔質弾性部材の中で注入液の硬化が進む。完全に硬化 すれば、大きな耐圧性が生じて第2空間の注入液が外部に洩れ出ることはなくな り、これに伴い、先端に最も近い多孔質弾性部材内への注入液の浸透も止まり、 該多孔質弾性部材も硬化して大きな耐圧性を発揮するので、第1空間内を確実に 注入液で満たしかつ滞留、硬化させることができ、所期の支保強度を実現ること かできる。 なお、2番目に先端寄りの多孔質弾性部材の中で注入液が硬化する前に、第2 空間が注入液で満たされて圧力が高まったことで、2番目に先端寄りの多孔質弾 性部材より手元側の空間に洩れ出てきたとしても最早少量であり、3番目の多孔 質弾性部材があるときは、2番目の多孔質弾性部材と同様にして、注入液の外部 への洩れ出しが阻止される。 As described above, according to the present invention, a plurality of porous elastic members mounted so as to wrap around the outer peripheral surface are provided in the vicinity of the body of the liquid injection fixing type support member main body at intervals in the axial direction. When the member is driven into the ground, the porous elastic member is compressed, and the elastic restoring force gently seals the gap between the bore hole and the body of the liquid injection fixing type supporting member. In this state, if the injection liquid is injected into the bore hole by passing through the body of the liquid injection fixing type supporting member or the injection pipe, the tip of the injection fixing type supporting member main body and the bore hole are located at the most distal end. The first space on the tip side when viewed from the porous elastic member is filled with the injection liquid, and part of the liquid permeates into the ground. Then, when receiving a weak initial pressure from the injecting liquid, the injecting liquid permeates into the porous elastic member closest to the tip, but the initial permeation rate is low because of resistance from the porous elastic member. After that, when the injection liquid becomes full and the pressure increases in the first space, the injection liquid enters the porous elastic member in a clogged state, and the hardening progresses to a certain degree. Since the injection liquid does not leak to the outside at a stretch, and when it is not completely cured in the porous elastic member, part of it is the most distal porosity and the second is the most distal porosity. It gradually leaks into the second space between the members and permeates the second porous porous member near the tip. The pressure in the second space is much weaker than that in the first space, and the rate of penetration into the porous elastic member that is the second closest to the tip is fairly slow, so that retention and hardening proceed in the second space, and Second, the hardening of the injecting liquid proceeds in the porous elastic member closer to the tip. When completely cured, a large pressure resistance is generated and the injected liquid in the second space does not leak outside, and along with this, the permeation of the injected liquid into the porous elastic member closest to the tip also stops. Since the porous elastic member also hardens and exhibits a large pressure resistance, it is possible to reliably fill the first space with the injecting liquid, and to retain and harden it, so that the desired supporting strength can be realized. In addition, since the second space was filled with the injection liquid and the pressure increased before the injection liquid was hardened in the second porous elastic member near the tip, the porous elasticity near the second end was increased. Even if it leaks into the space nearer to the member, the amount is no longer small. If there is a third porous elastic member, the leakage of the infused liquid to the outside will be the same as for the second porous elastic member. Is blocked.
【0048】 このように、注液定着式支保部材本体の手元近くに装着した複数の多孔質弾性 部材により注入液のシールドを確実に行うことができるので、注入作業中、注入 液が外部に洩れて、注液定着式支保部材本体とボアホールの間の隙間に注入液の 充填不良が生じるようなことはなく、よって、従来の如き、パッカーを膨らませ たり、パッカーが破れた場合の漏れ止めをしたり、注液定着式支保部材本体が自 穿孔式の場合のように、ウエスや急結性セメントを詰めたりしなくて済み、現場 での作業負担が大幅に軽減する。In this way, the pouring liquid can be reliably shielded by the plurality of porous elastic members mounted near the body of the pouring fixing type supporting member body, so that the pouring liquid leaks to the outside during the pouring operation. As a result, there is no possibility of inadequate filling of the injection liquid in the gap between the body of the liquid injection fixing type support member and the borehole. In addition, unlike the case where the body of the liquid injection fixing type supporting member is self-drilling type, there is no need to pack waste cloth or quick-setting cement, and the work load on site is greatly reduced.
【0049】 また、中空で先端等に1または複数の噴出口が設けられたロックボルト、アン カー、グラウト管等の注液定着式支保部材本体を有する注液定着式支保部材にお いて、注液定着式支保部材本体の手元近くに、軸方向に間隔をあけながら外周面 を包み込むように装着した複数の多孔質弾性部材を設けるとともに、多孔質弾性 部材間の注液定着式支保部材本体に噴出口を穿設する。 これにより、注液定着式支保部材本体を地盤に打ち込んだあと、注入液の注入 を行うと、まず、手元近くの噴出口から多孔質弾性部材間の空間に注入液が入り 、該多孔質弾性部材内にも浸透する。噴出口がそれほど大きくなければ、多孔質 弾性部材が受ける圧力は弱く、浸透速度が遅いので硬化が進む。 その後、注液定着式支保部材本体の先端等の噴出口から注入液がボアホール内 に入り、注液定着式支保部材本体の最も先端寄りの多孔質弾性部材より先端側の 空間が注入液で充填されていく。該空間が注入液で満杯になると最も先端寄りの 多孔質弾性部材に高い圧力が掛かるが、既に、複数の多孔質弾性部材にわたる範 囲が硬化しているので、十分なシールド効果が発揮され、注入液が外部に洩れ出 すことはない。よって、ボアホール内は注入液が満たされた状態で硬化し、所期 の支保強度となるので、従来の如き、使用したパッカーが破れたため漏れ止めを したり、ウエスや急結性セメントを詰めたりしなくて済み、現場作業を簡単に行 える。Further, in a liquid injection fixing type supporting member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor, a grout tube, etc., which is hollow and provided with one or a plurality of ejection ports at its tip or the like, Provided near the body of the liquid-fixing type supporting member main body are a plurality of porous elastic members mounted so as to wrap around the outer peripheral surface while leaving a gap in the axial direction, and to the liquid-fixing type supporting member main body between the porous elastic members. Drill a spout. As a result, when the injection fixing type support member main body is driven into the ground and then the injection liquid is injected, first, the injection liquid enters the space between the porous elastic members from the jet outlet near the hand, and the porous elastic member is injected. It also penetrates into the members. If the ejection port is not so large, the pressure applied to the porous elastic member is weak and the permeation speed is slow, so hardening proceeds. After that, the injection liquid enters the bore hole from the ejection port such as the tip of the body of the liquid injection fixing type supporting member, and the space on the tip side of the porous elastic member closest to the tip of the body of the liquid fixing fixing type supporting member is filled with the injection liquid. Will be done. When the space is filled with the injection liquid, a high pressure is applied to the porous elastic member closest to the tip, but since the range over the plurality of porous elastic members has already hardened, a sufficient shielding effect is exerted, The injected liquid does not leak outside. Therefore, the inside of the borehole is hardened when it is filled with the injection liquid, and the desired supporting strength is achieved.As a conventional packer used, the packer is broken, so that leakage is prevented and waste cloth or quick-setting cement is filled. There is no need to do it, and on-site work can be performed easily.
【0050】 また、中空で先端等に1または複数の噴出口が設けられたロックボルト、アン カー、グラウト管等の注液定着式支保部材本体を有する注液定着式支保部材にお いて、注液定着式支保部材本体の手元近くに、外周面を包み込むように装着した 1または複数の多孔質弾性部材を設けるとともに、注液定着式支保部材本体の多 孔質弾性部材の装着された箇所に噴出口を穿設したので、注液定着式支保部材本 体を地盤に打ち込んだあと、注入液の注入を行うと、まず、手元近くの噴出口か ら各多孔質弾性部材内に注入液が浸透する。噴出口がそれほど大きくなければ、 多孔質弾性部材が受ける圧力は弱く、浸透速度が遅いので硬化が進む。 その後、注液定着式支保部材本体の先端等の噴出口から注入液がボアホール内 に入り、多孔質弾性部材との間の空間が注入液で充填されていく。該空間が注入 液で満杯になると多孔質弾性部材に高い圧力が掛かるが、既に、多孔質弾性部材 の硬化が或る程度進んでいること、及び、先に多孔質弾性部材に注入液を浸透さ せた噴出口の圧力も高くなって、該多孔質弾性部材を孔壁側に押しつけることか ら十分なシールド効果が発揮され、注入液が外部に洩れ出すことはない。よって 、ボアホール内は注入液が満たされた状態で硬化し、所期の支保強度となるので 、従来の如き、使用したパッカーが破れたため漏れ止めをしたり、ウエスや急結 性セメントを詰めたりしなくて済み、現場作業を簡単に行える。In addition, in a liquid injection fixing type supporting member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor, a grout tube, etc., which is hollow and has one or a plurality of jet ports at its tip or the like, Provide one or more porous elastic members mounted so as to wrap around the outer peripheral surface near the body of the liquid fixing type supporting member main body, and at the place where the multi-hole elastic member of the liquid fixing type supporting member main body is mounted. Since the ejection port was bored, when the injection liquid was injected after the main body of the liquid injection fixing type support member was driven into the ground, the injection liquid was first injected into each porous elastic member from the ejection port near the hand. Penetrate. If the ejection port is not so large, the pressure applied to the porous elastic member will be weak and the permeation rate will be slow, so hardening will proceed. After that, the injection liquid enters the borehole from the ejection port such as the tip of the main body of the injection fixing type support member, and the space between the support member and the porous elastic member is filled with the injection liquid. When the space is filled with the injection liquid, a high pressure is applied to the porous elastic member, but the porosity elastic member has already hardened to some extent, and the injection liquid permeates the porous elastic member first. Since the pressure of the jet outlet is also increased and the porous elastic member is pressed against the hole wall side, a sufficient shielding effect is exhibited, and the injected liquid does not leak outside. Therefore, the inside of the borehole is hardened in a state where it is filled with the injecting liquid, and the desired supporting strength is achieved. There is no need to do it, and on-site work can be performed easily.
【0051】 また、ロックボルト、アンカー、グラウト管等の注液定着式支保部材本体と、 注液定着式支保部材本体の外面に装着した1または複数の注入パイプを有する注 液定着式支保部材において、注液定着式支保部材本体の手元近くに、軸方向に間 隔をあけながら外周面を包み込むように装着した複数の多孔質弾性部材を設ける とともに、少なくとも1つの注入パイプが多孔質弾性部材間に開口した噴出口を 有するようにしたので、注液定着式支保部材本体を地盤に打ち込んだあと、注入 パイプを通して注入液の注入を行うと、まず、手元近くの噴出口から多孔質弾性 部材間の空間に注入液が入り、該多孔質弾性部材内にも浸透する。噴出口がそれ ほど大きくなければ、多孔質弾性部材が受ける圧力は弱く、浸透速度が遅いので 硬化が進む。 その後、注入パイプの他の噴出口から注入液がボアホール内に入り、注液定着 式支保部材本体の最も先端寄りの多孔質弾性部材より先端側の空間が注入液で充 填されていく。該空間が注入液で満杯になると最も先端寄りの多孔質弾性部材に 高い圧力が掛かるが、既に、複数の多孔質弾性部材にわたる範囲が硬化している ので、十分なシールド効果が発揮され、注入液が外部に洩れ出すことはない。よ って、ボアホール内は注入液が満たされた状態で硬化し、所期の支保強度となる ので、従来の如き、使用したパッカーが破れたため漏れ止めをしたり、ウエスや 急結性セメントを詰めたりしなくて済み、現場作業を簡単に行える。In addition, in a liquid injection fixing type support member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor, a grout pipe, etc., and one or a plurality of injection pipes mounted on the outer surface of the liquid injection fixing type supporting member main body. In the vicinity of the body of the liquid injection fixing type supporting member, a plurality of porous elastic members mounted so as to wrap around the outer peripheral surface while providing a gap in the axial direction are provided, and at least one injection pipe is provided between the porous elastic members. Since it has an ejection port that opens at the end, when the injection fixing type support member main body is driven into the ground and then the injection liquid is injected through the injection pipe, first, from the ejection port near the hand to the porous elastic member The injection liquid enters the space of and penetrates into the porous elastic member. If the ejection port is not so large, the pressure applied to the porous elastic member is weak and the permeation rate is slow, so hardening progresses. After that, the injection liquid enters the borehole from the other ejection port of the injection pipe, and the space on the tip side of the porous elastic member closest to the tip of the injection fixing type supporting member body is filled with the injection liquid. When the space is filled with the injection liquid, a high pressure is applied to the porous elastic member closest to the tip, but since the range over multiple porous elastic members has already been hardened, a sufficient shielding effect is exerted and injection is performed. The liquid does not leak outside. As a result, the inside of the borehole is hardened with the injection liquid filled, and the desired support strength is achieved.Therefore, as in the conventional case, the used packer broke, so leakage was prevented and waste cloth and quick-setting cement were used. You don't have to pack it, and you can easily perform on-site work.
【0052】 また、ロックボルト、アンカー、グラウト管等の注液定着式支保部材本体と、 注液定着式支保部材本体の外面に装着した1または複数の注入パイプを有する注 液定着式支保部材において、注液定着式支保部材本体の手元近くに、外周面を包 み込むように装着した1または複数の多孔質弾性部材を設けるとともに、少なく とも1つの注入パイプが多孔質弾性部材の装着された箇所に開口した噴出口を有 するようにしたので、注液定着式支保部材本体を地盤に打ち込んだあと、注入パ イプを通して注入液の注入を行うと、まず、手元近くの噴出口から各多孔質弾性 部材内に注入液が浸透する。噴出口がそれほど大きくなければ、多孔質弾性部材 が受ける圧力は弱く、浸透速度が遅いので硬化が進む。 その後、注入パイプの他の噴出口から注入液がボアホール内に入り、多孔質弾 性部材との間の空間が注入液で充填されていく。該空間が注入液で満杯になると 多孔質弾性部材に高い圧力が掛かるが、既に、多孔質弾性部材の硬化が或る程度 進んでいること、及び、先に多孔質弾性部材に注入液を浸透させた噴出口の圧力 も高くなって、該多孔質弾性部材を孔壁側に押しつけることから十分なシールド 効果が発揮され、注入液が外部に洩れ出すことはない。よって、ボアホール内は 注入液が満たされた状態で硬化し、所期の支保強度となるので、従来の如き、使 用したパッカーが破れたため漏れ止めをしたり、ウエスや急結性セメントを詰め たりしなくて済み、現場作業を簡単に行える。Further, in a liquid injection fixing type supporting member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor and a grout pipe, and one or a plurality of injection pipes attached to an outer surface of the liquid injection fixing type supporting member main body. , One or more porous elastic members mounted so as to wrap around the outer peripheral surface were provided near the body of the liquid injection fixing type supporting member main body, and at least one injection pipe was mounted with the porous elastic member. Since there is a spout that opens at the location, when the injection fixing type support member main body is driven into the ground and then the injection liquid is injected through the injection pipe, first, each porosity is released from the spout near the hand. The injection liquid penetrates into the elastic material. If the ejection port is not so large, the pressure applied to the porous elastic member will be weak and the permeation rate will be slow, so hardening will proceed. After that, the injection liquid enters the borehole from the other ejection port of the injection pipe, and the space between the injection hole and the porous elastic member is filled with the injection liquid. When the space is filled with the injection liquid, a high pressure is applied to the porous elastic member, but the hardening of the porous elastic member has already progressed to some extent, and the injection liquid permeates into the porous elastic member first. Since the pressure of the ejected port is also increased and the porous elastic member is pressed against the hole wall side, a sufficient shielding effect is exhibited and the injected liquid does not leak outside. Therefore, the inside of the borehole is hardened with the injection liquid filled, and the desired supporting strength is achieved, so that the used packer broke and the leak was prevented and the waste cloth and quick-setting cement were packed. There is no need to worry, and on-site work can be done easily.
【図1】本考案の第1実施例に係る注液定着式支保部材
の外観斜視図である。FIG. 1 is an external perspective view of a liquid injection fixing type supporting member according to a first embodiment of the present invention.
【図2】多孔質弾性部材のロックボルトへの装着方法の
説明図である。FIG. 2 is an explanatory diagram of a method of mounting a porous elastic member on a lock bolt.
【図3】第1実施例の使用状態を示す第1の説明図であ
る。FIG. 3 is a first explanatory diagram showing a usage state of the first embodiment.
【図4】第1実施例の使用状態を示す第2の説明図であ
る。FIG. 4 is a second explanatory diagram showing a usage state of the first embodiment.
【図5】第1実施例の変形例を示す外観斜視図である。FIG. 5 is an external perspective view showing a modified example of the first embodiment.
【図6】注液定着式支保部材の断面図である。FIG. 6 is a cross-sectional view of a liquid injection fixing type supporting member.
【図7】第1実施例の他の変形例の使用状態説明図であ
る。FIG. 7 is a diagram illustrating a usage state of another modification of the first embodiment.
【図8】第2実施例の使用状態説明図である。FIG. 8 is a diagram illustrating a usage state of the second embodiment.
【図9】第2実施例の変形例構成図である。FIG. 9 is a configuration diagram of a modification of the second embodiment.
【図10】第2実施例の他の変形例構成図である。FIG. 10 is a configuration diagram of another modification of the second embodiment.
【図11】第3実施例の使用状態説明図である。FIG. 11 is an explanatory diagram of a usage state of the third embodiment.
【図12】第3実施例の変形例構成図である。FIG. 12 is a configuration diagram of a modification of the third embodiment.
【図13】第3実施例の他の変形例構成図である。FIG. 13 is a block diagram of another modification of the third embodiment.
【図14】第2実施例と第3実施例を組み合わせた注液
定着式支保部材の構成図である。FIG. 14 is a configuration diagram of a liquid injection fixing type supporting member in which the second embodiment and the third embodiment are combined.
【図15】従来のロックボルトの使用例を示す説明図で
ある。FIG. 15 is an explanatory diagram showing a usage example of a conventional lock bolt.
【図16】図15中のパッカーの構成図である。16 is a configuration diagram of the packer in FIG.
【図17】他の種類のパッカーの構成図である。FIG. 17 is a configuration diagram of another type of packer.
30、30A ロックボルト 30B 自穿孔ロックボルト 36、38、40 多孔質弾性部材 32、34、58、60、62、64、66、68、7
0、72、74 噴出口 42、42A、42B、42C、42D 注液定着式支
保部材 44、440 注入パイプ30, 30A Lock bolt 30B Self-drilling lock bolt 36, 38, 40 Porous elastic member 32, 34, 58, 60, 62, 64, 66, 68, 7
0, 72, 74 Jet port 42, 42A, 42B, 42C, 42D Injection fixing fixing support member 44, 440 Injection pipe
Claims (5)
の注液定着式支保部材本体を有する注液定着式支保部材
において、 注液定着式支保部材本体の手元近くに、軸方向に間隔を
あけながら外周面を包み込むように装着した複数の多孔
質弾性部材を設けたこと、 を特徴とする注液定着式支保部材。1. A liquid injection fixing type supporting member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor, a grout pipe, etc., with an axial space provided near the liquid injection fixing type supporting member main body. A liquid injection fixing type supporting member, comprising a plurality of porous elastic members mounted so as to wrap around the outer peripheral surface.
設けられたロックボルト、アンカー、グラウト管等の注
液定着式支保部材本体を有する注液定着式支保部材にお
いて、 注液定着式支保部材本体の手元近くに、軸方向に間隔を
あけながら外周面を包み込むように装着した複数の多孔
質弾性部材を設けるとともに、 多孔質弾性部材間の注液定着式支保部材本体に噴出口を
穿設したこと、 を特徴とする注液定着式支保部材。2. A liquid injection fixing type supporting member having a hollow liquid injection fixing type supporting member main body such as a lock bolt, an anchor, a grout tube, etc., provided with one or a plurality of jet holes at its tip or the like. Around the hand of the supporting member body, a plurality of porous elastic members mounted so as to wrap around the outer peripheral surface at intervals in the axial direction are provided, and a spout is provided in the liquid injection fixing type supporting member body between the porous elastic members. A liquid injection fixing type supporting member characterized by having been drilled.
設けられたロックボルト、アンカー、グラウト管等の注
液定着式支保部材本体を有する注液定着式支保部材にお
いて、 注液定着式支保部材本体の手元近くに、外周面を包み込
むように装着した1または複数の多孔質弾性部材を設け
るとともに、 注液定着式支保部材本体の多孔質弾性部材の装着された
箇所に噴出口を穿設したこと、 を特徴とする注液定着式支保部材。3. A liquid injection fixing type supporting member having a hollow liquid injection fixing type supporting member main body such as a lock bolt, an anchor, a grout tube, etc., provided with one or a plurality of ejection ports at its tip or the like. Provide one or more porous elastic members mounted so as to wrap around the outer peripheral surface near the support member main body, and make a spout at the place where the porous elastic member of the liquid injection fixing type support member main body is mounted. A liquid injection fixing type support member characterized by being installed.
の注液定着式支保部材本体と、注液定着式支保部材本体
の外面に装着した1または複数の注入パイプを有する注
液定着式支保部材において、 注液定着式支保部材本体の手元近くに、軸方向に間隔を
あけながら外周面を包み込むように装着した複数の多孔
質弾性部材を設けるとともに、 少なくとも1つの注入パイプが多孔質弾性部材間に開口
した噴出口を有すること、 を特徴とする注液定着式支保部材。4. A liquid injection fixing type support member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor, a grout pipe, etc., and one or a plurality of injection pipes mounted on an outer surface of the liquid injection fixing type supporting member main body. , A plurality of porous elastic members mounted so as to wrap around the outer peripheral surface while providing a space in the axial direction near the body of the liquid injection fixing type supporting member main body, and at least one injection pipe between the porous elastic members. An injecting and fixing type supporting member, characterized in that it has an open ejection port.
の注液定着式支保部材本体と、注液定着式支保部材本体
の外面に装着した1または複数の注入パイプを有する注
液定着式支保部材において、 注液定着式支保部材本体の手元近くに、外周面を包み込
むように装着した1または複数の多孔質弾性部材を設け
るとともに、 少なくとも1つの注入パイプが多孔質弾性部材の装着さ
れた箇所に開口した噴出口を有すること、 を特徴とする注液定着式支保部材。5. A liquid injection fixing type support member having a liquid injection fixing type supporting member main body such as a lock bolt, an anchor and a grout tube, and one or a plurality of injection pipes mounted on the outer surface of the liquid injection fixing type supporting member main body. , One or more porous elastic members mounted so as to wrap around the outer peripheral surface are provided near the body of the liquid injection fixing type supporting member main body, and at least one injection pipe is opened at the position where the porous elastic member is mounted. A liquid injection fixing type supporting member, characterized in that it has a spout.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1993035251U JP2553336Y2 (en) | 1993-06-29 | 1993-06-29 | Injection fixing type support member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1993035251U JP2553336Y2 (en) | 1993-06-29 | 1993-06-29 | Injection fixing type support member |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH074600U true JPH074600U (en) | 1995-01-24 |
JP2553336Y2 JP2553336Y2 (en) | 1997-11-05 |
Family
ID=12436611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP1993035251U Expired - Fee Related JP2553336Y2 (en) | 1993-06-29 | 1993-06-29 | Injection fixing type support member |
Country Status (1)
Country | Link |
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JP (1) | JP2553336Y2 (en) |
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JP2000345789A (en) * | 1999-06-03 | 2000-12-12 | Tokai Rubber Ind Ltd | Mouth caulking device used for filling type long-sized steel pipe tip receiving work, and filling type long-sized steel pipe tip receiving method using the device |
JP2002242446A (en) * | 2001-02-19 | 2002-08-28 | Nippon Grease Nipple Kk | High pressure injection apparatus for fragile construction body and high pressure injection construction method using this apparatus and funnel jig of fixing chemical |
JP2005083130A (en) * | 2003-09-10 | 2005-03-31 | Nishimatsu Constr Co Ltd | Lock bolt securing method and auxiliary tool for use therein |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101579234B1 (en) | 2014-04-08 | 2015-12-21 | 김현주 | Protecting part of ending area for expanding type rockbolt |
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JPS63233199A (en) * | 1987-03-20 | 1988-09-28 | 大阪鋼管株式会社 | Method of lock bolt construction |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000345789A (en) * | 1999-06-03 | 2000-12-12 | Tokai Rubber Ind Ltd | Mouth caulking device used for filling type long-sized steel pipe tip receiving work, and filling type long-sized steel pipe tip receiving method using the device |
JP2002242446A (en) * | 2001-02-19 | 2002-08-28 | Nippon Grease Nipple Kk | High pressure injection apparatus for fragile construction body and high pressure injection construction method using this apparatus and funnel jig of fixing chemical |
JP4545963B2 (en) * | 2001-02-19 | 2010-09-15 | 株式会社Gns | High-pressure injection device for brittle construction, high-pressure injection method using the same, and funnel jig for fixing chemical |
JP2005083130A (en) * | 2003-09-10 | 2005-03-31 | Nishimatsu Constr Co Ltd | Lock bolt securing method and auxiliary tool for use therein |
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