JP2553336Y2 - Injection fixing type support member - Google Patents
Injection fixing type support memberInfo
- Publication number
- JP2553336Y2 JP2553336Y2 JP1993035251U JP3525193U JP2553336Y2 JP 2553336 Y2 JP2553336 Y2 JP 2553336Y2 JP 1993035251 U JP1993035251 U JP 1993035251U JP 3525193 U JP3525193 U JP 3525193U JP 2553336 Y2 JP2553336 Y2 JP 2553336Y2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- porous elastic
- fixing type
- injection
- support 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.)
- Expired - Fee Related
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【０００１】[0001]
【産業上の利用分野】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。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fixing type support member having a lock bolt or the like as a main body used in tunnel construction, retaining wall construction, and the like. The present invention relates to a liquid injection fixing type support member that is prevented from leaking from a gap between the ground and the like.
【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、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。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. Is fixed by a predetermined injection liquid (injection material) such as a mortar, a fixing agent, a ground improvement material, or the like to prevent the inner wall from collapsing. For the rock bolt, a hole (bore hole) is previously drilled in the rock with a rock drill or the like, and the rock bolt is driven into the hole later, or the self-drilling rock bolt is rotated by the rock drill through an adapter,
Rock is excavated and driven by a bit attached to the tip of the self-drilling lock bolt.
【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
２４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 using a lock bolt when a borehole is previously drilled in a bedrock and an injection liquid is injected using an injection pipe and an exhaust pipe. After drilling a borehole 16 having a predetermined depth from the inner wall 14 of the tunnel 12 excavated in the ground 10 and perpendicular to the inner wall 14 into the rock, a rock 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 at the mouth of the lock bolt 18 with a tape or the like so as to form a bag, and an injection pipe that hits the mounting position of the packer 24 with the lock bolt 18. A jet port 26 is formed in 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１
６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１
６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。While the air in the borehole is exhausted from the exhaust pipe 22, the injection liquid (mortar, mortar,
Fixing agent, ground improvement material, etc.), the injection pipe 20
The injection liquid enters the inside of the packer 24 from the jet port 26 of
The packer 24 is enlarged. As a result, the lock bolt 18 and the borehole 1 are located near the mouth of the lock bolt 18.
The gap between 6 is sealed. On the other hand, the injection liquid also flows out from the tip of the injection pipe 20 into the bore hole, and the bore hole 1
The space between the lock bolt 6 and the lock bolt 18 is filled. 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 infused liquid acts as a seal, there is no possibility that a defective filling of the infused 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. Thereafter, when the injection liquid hardens, the lock bolt 18 and the periphery of the inner wall are integrally fixed,
Since the rock bolt is supported by the hard inner rock struck at the tip, the collapse around 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１
８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 view showing another example of the packer. The packer 28 is formed by attaching a rubber member to the lock bolt 18 at a predetermined location near the mouth 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 injection is completed, air, water and the like are sent into the inside of the packer 28 through the injection pipe 30 to enlarge the packer 28. Thereby, the lock bolt 1
The gap between the lock bolt 18 and the borehole 16 can be closed near the mouth of the nozzle 8, and poor filling of the infusate can be prevented.
【０００７】[0007]
【考案が解決しようとする課題】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, the conventional packers 24 and 28 use the lock bolts 18 and the boreholes 16.
After inserting and driving, it is formed only with a relatively flexible membrane material such as cloth, rubber, etc., so that infusion liquid, air, water, etc. can be sent inside and expanded like a balloon like a balloon. Can not. On the other hand, it is difficult to make the borehole 16 drilled in the bedrock as a clean hole wall, and a sharp rock is often exposed inside or a broken rock is often dropped.
For this reason, when the lock bolt 18 is inserted into the borehole 16 and driven, the packers 24 and 28 are rubbed against sharp rocks or broken rocks, and partly damaged. In some cases.
【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１
６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 exhibit a sealing effect, and
The infusate fed into the gap 6 leaks out from the mouth of the borehole 16, and the gap between the borehole 16 and the lock bolt 18 causes poor filling. At this time, the waste must be packed from the mouth, which takes extra time. In addition, if the filling of the waste does not prevent leakage of the infusate, the lock bolt 16 may not be securely fixed to the periphery of the inner wall. 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, in the case of a self-drilling lock bolt, the packer cannot be used because the packer is more likely to be damaged because it is rotated. Therefore, after driving, a waste or quick-setting cement is filled into the mouth of the borehole. As a result, the work load is large, and there is also a risk that the injection liquid may 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。SUMMARY OF THE INVENTION It is an object of the present invention to provide an infusion fixing type support member which can reliably seal an infusate without imposing a burden on an operator.
【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注
入液浸透特性を備えた多孔質弾性部材を設けたことによ
り達成される。According to the present invention, there is provided a liquid fixing type support member body such as a lock bolt, an anchor, and a grout tube, and an outer peripheral portion which is spaced apart in an axial direction near a hand of the liquid fixing type support member body. Multiple notes wrapped around the face
This is achieved by providing a porous elastic member having the liquid-permeation property .
【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 fixing type supporting member is driven into the ground, the porous elastic member is compressed, and the gap between the bore hole and the liquid fixing type supporting member main body is gently sealed by the elastic restoring force. Is done. In this state, if the injection liquid is injected into the borehole by passing through the liquid fixing type support member main body or through an injection pipe, the most porous hole between the liquid injection fixing type support member main body and the borehole is formed. The first space on the distal end side as viewed from the elastic material is filled with the injection liquid, and a part of the liquid penetrates into the ground. Then, the injection liquid receives a weak initial pressure from the injection liquid, and the injection liquid penetrates into the porous elastic member closest to the front end. However, the initial permeation speed is slow because of resistance from the porous elastic member. Thereafter, when the injection liquid is filled in the first space and the pressure is increased, the injection liquid is filled in the porous elastic member in a clogged state, and since the curing is advanced to some extent, the pressure resistance is increased. Is high, the infusate does not leak out at once, and when it is not completely cured in the porous elastic member, a part of the porous elastic member is closest to the tip and the second is the second. Only gradually leaks into the second space between them and only penetrates the porous elastic member closest to the second tip. Since the pressure in the second space is much weaker than that in the first space, and the permeation speed into the porous elastic member near the second end is considerably slow, the pressure in the second space is low.
The hardening proceeds, and the hardening of the injection liquid progresses second in the porous elastic member near the front end. When completely cured, a large pressure resistance is generated, so that the infused liquid in the second space does not leak to the outside, and accordingly, the permeation of the infused liquid into the porous elastic member closest to the tip also stops, Since the porous elastic member is also hardened and exerts a large pressure resistance, the first space can be reliably filled with the infusate, retained and hardened, and the desired support strength can be realized. Before the injection liquid hardens in the porous elastic member near the tip second,
The second space was filled with the injection liquid and the pressure increased,
Even if it leaks into the space closer to the hand than the porous elastic member near the tip second, the amount is no longer small, and when there is a third porous elastic member, it is similar to the second porous elastic member. In addition, leakage of the infusate to the outside is prevented.
【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。As described above, the injection liquid can be reliably shielded by the plurality of porous elastic members mounted near the hand of the liquid injection fixing type support member main body.
The injected liquid does not leak to the outside, and the filling of the injected liquid does not occur in the gap between the liquid injection fixing type support member main body and the borehole, so that the packer is expanded or the packer is broken as in the conventional case. In such a case, it is not necessary to prevent leakage or to fill the waste and the quick-setting cement as in the case of the self-piercing type of the liquid fixing type support member body, so that the work load on the 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 a liquid fixing type supporting member having a liquid 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 a tip or the like, a liquid fixing type is provided. Near the hand of the support member main body, a plurality of porous elastic members mounted so as to wrap the outer peripheral surface while being spaced apart in the axial direction are provided, and a spout is provided in the liquid fixing type support member main body between the porous elastic members. Drill. When the injection liquid is injected after the main body of the liquid injection fixing type support member is driven into the ground, first, the injection liquid enters the space between the porous elastic members from the ejection port near the hand, and the porous elastic It penetrates into the member. If the ejection port is not so large, the pressure applied to the porous elastic member is weak and the penetration speed is low, so that the curing proceeds. After that, the injection liquid enters the borehole from the spout such as the tip of the liquid fixing type support member main body, and the space on the tip side of the porous elastic member closest to the front end of the liquid fixing type support member body is filled with the injection liquid. Will be done. When the space is filled with the infusate, high pressure is applied to the porous elastic member closest to the tip, but since the area over the plurality of porous elastic members has already been hardened, a sufficient shielding effect is exhibited, and the injection is performed. The liquid does not leak out. Therefore,
Since the inside of the borehole is hardened with the filling liquid filled, it has the expected strength, so there is no need to prevent leaks or pack waste or quick-setting cement because the used packer was torn as in the past. 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 fixing type supporting member having a liquid 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 a tip or the like, a liquid fixing type Near the hand of the support member main body, one or a plurality of porous elastic members mounted so as to wrap the outer peripheral surface are provided, and a spout is formed at a location of the liquid fixing type support member main body where the porous elastic member is mounted. Set up. Accordingly, when the injection liquid is injected after the liquid injection fixing type support member main body is driven into the ground, 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 is weak and the penetration speed is low, so that the curing proceeds. Thereafter, the injection liquid enters the borehole from an ejection port such as the tip of the liquid injection fixing type support member main body, 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 infusion liquid, a high pressure is applied to the porous elastic member, but the curing of the porous elastic member has already progressed to some extent, and the infusion liquid has already penetrated the porous elastic member. The pressure of the spout also increases, and the porous elastic member is pressed against the hole wall, so that a sufficient shielding effect is exhibited, and the infusate does not leak out. Therefore, the inside of the borehole is hardened in the state where the injection liquid is filled, and the intended support strength is obtained.
There is no need to pack waste and quick-setting cement, so 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。Further, in a liquid fixing type supporting member having a liquid 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 an outer surface of the liquid fixing type supporting member main body. A plurality of porous elastic members mounted so as to wrap around the outer peripheral surface while being spaced apart in the axial direction are provided near the hand of the liquid fixing type support member main body, and at least one injection pipe is provided between the porous elastic members. Have an open spout. This allows
After the liquid injection fixing type support member main body is driven into the ground and the injection liquid is injected through the injection pipe, first, the injection liquid enters the space between the porous elastic members from the outlet near the hand,
It also 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 penetration speed is low, so that the curing proceeds. Thereafter, the injection liquid enters the borehole from another injection port of the injection pipe, and the space on the tip side of the porous elastic member closest to the tip end of the liquid fixing type support member main body is filled with the injection liquid. When the space is filled with the infusate, a high pressure is applied to the porous elastic member closest to the tip, but already, the range over a plurality of porous elastic members is hardened, so that a sufficient shielding effect is exhibited,
The infusate does not leak out. Therefore, the inside of the borehole is hardened with the filling liquid filled, and the intended support strength is obtained.Therefore, as in the conventional case, the used packer has been torn, so that it will not leak or fill with rags and quick-setting cement. Work can be done easily and site work can be done easily.
【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 fixing type supporting member having a liquid fixing type supporting member 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 fixing type supporting member body. One or a plurality of porous elastic members mounted so as to wrap around the outer peripheral surface are provided near the hand of the liquid fixing type support member main body, and at least one injection pipe is opened at a position where the porous elastic member is mounted. To have a spout. Accordingly, when the injection liquid is injected through the injection pipe after the liquid injection fixing type support member main body is driven into the ground, 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 is weak and the penetration speed is low, so that the curing proceeds. Thereafter, the injection liquid enters the borehole from another injection port of the injection pipe, and the space between the injection pipe and the porous elastic member is filled with the injection liquid. When the space is filled with the infusion liquid, a high pressure is applied to the porous elastic member, but the curing of the porous elastic member has already progressed to some extent, and the infusion liquid has already penetrated the porous elastic member. The pressure of the spout also increases, and the porous elastic member is pressed against the hole wall, so that a sufficient shielding effect is exhibited, and the infusate does not leak out. Therefore, the inside of the borehole is hardened with the filling liquid filled, and the intended support strength is obtained.Therefore, as in the conventional case, the used packer has been torn, so that it will not leak or fill with rags and quick-setting cement. Work can be done easily and site work can be done easily.
【００１８】[0018]
【実施例】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３
２、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 a perspective view showing the appearance of a liquid fixing type support member according to a first embodiment of the present invention. FIG. 1 shows a type in which a lock bolt that does not require an injection pipe is used as a liquid injection fixing type support member main body, which is a type that is inserted into a bore hole previously drilled in rock. In FIG. 1, reference numeral 30 denotes a hollow lock bolt as an example of a liquid injection fixing type support member main body.
It is designed to be press-fit into the bore hole from 2, 34. Reference numerals 36 to 40 denote three porous members having 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 surround the outer peripheral surface at a predetermined distance in the axial direction. It is an elastic member. These porous elastic members 36 to 40 may be, for example, ordinary sponge materials (open-cell bodies), or may be members having both water-absorbing swelling properties. The thickness of the porous elastic members 36 to 40 is such that the outer diameter at the stage of bonding to the lock bolt 30 is slightly larger than the hole diameter of the borehole.
【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 mounted on the lock bolt 30 by fitting a cylindrical member into the lock bolt 30 in advance.
What is necessary is just to wind a square thing around the lock bolt 30. Lock bolt 30, porous elastic members 36-40
Constitutes a liquid injection fixing type support 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３
６〜４０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 use state of this embodiment. A borehole 16 having a predetermined depth is drilled from the inner wall 14 of the tunnel 12 excavated in the ground 10 to the inside of the bedrock perpendicular to the inner wall 14 (see FIG. 3A). Next, a liquid injection fixing type support 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 (see FIG. 3 (2)). At this time, the porous elastic member 3
Since 6 to 40 are easily compressed by the external force received from the hole wall, they do not hinder insertion and driving. When the insertion and driving of the liquid fixing type support member 42 is completed, the gap between the borehole 16 and the lock bolt 30 is relatively loosely shielded by the porous elastic members 36 to 40 by the elastic restoring force. Even when any one of the porous elastic members 36 to 40 is partially damaged at the hole wall when the liquid injection fixing type support member 42 is inserted or driven, or when the rocking or the like protruding from the hole wall is completed after the driving is completed, the porous elastic member 36 to 40 is dented. In addition, since the other porous elastic member is in close contact with the hole wall, the shielding property is ensured.
【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３
２、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）。Thereafter, an injection liquid (a mortar, a fixing agent, a ground improvement material, etc., having a relatively short gel time (hardening time: about 30 to 70 seconds) in this case) is applied from the hand side of the lock bolt 30. When injection, first, the injection port 3 such as the tip
2 and 34, the first space A between the bore hole 16 and the lock bolt 30 is filled in the first space A on the tip side of the porous elastic member 36 closest to the tip, and the geology of the ground 10 is reduced. If it has permeability, a part penetrates 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）。As long as the first space A is not yet full of the infusate, the first elastic elastic member 36 near the front end has the first space.
Since only a relatively weak initial pressure is applied to the liquid in the space A, the shielding effect of the porous elastic member 36 is superior,
Most of the injected liquid stays in the first space A, and only a part of the injected liquid permeates the porous elastic member 36. However, because the resistance is received from the porous elastic member 36, the initial permeation speed is low, and the filling of the first space A with the infusate proceeds (FIG. 4A).
reference).
【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）。Thereafter, when the injection liquid is filled in the first space A and the pressure is increased, the injection liquid is filled in the porous elastic member 36 in a clogged state, and the curing is proceeding to some extent. Accordingly, the pressure resistance of the porous elastic member 36 is high, and the infusate does not leak out at once, and when the porous elastic member 36 is not completely cured in the porous elastic member 36, a part of the porous elastic member 36 is at the most distal end. And gradually leaks into the second space B between the porous elastic members 36 and 38 which are closer to the tip and second to the tip.
It only permeates 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３
６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。The pressure of the injected liquid in the second space B is equal to the pressure in the first space A.
Since it is much weaker and the permeation rate into the porous elastic member 38 is considerably slow, the hardening of the injection liquid proceeds in the porous elastic member 38 and in the second space B. When completely cured, a large pressure resistance is generated and the injection liquid in the second space does not leak to the outside.
The permeation of the injection liquid into the interior of the porous elastic member 6 also stops, and the porous elastic member 36
The first space A can be reliably filled with the injection liquid, and can be retained and hardened since the first space A is also hardened and exhibits high pressure resistance.
【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３
８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）。The second space B is filled with the injection liquid and the pressure is increased before the injection liquid hardens in the porous elastic member 38 near the front end.
Even if it leaks out into the third space C closer to the hand than 8, it is no more than a small amount, and the permeation and hardening of the third porous elastic member 40 prevents the injection liquid from leaking out (FIG. 4).
(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。The operation 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 injection liquid in the borehole 16 is hardened, the lock bolt 30 and the periphery of the inner wall of the tunnel are integrally fixed and supported by the solid inner rock struck at the tip of the lock bolt, thereby causing the collapse of the periphery of the inner wall. Is prevented.
【００２７】この第１実施例によれば、ロックボルト３
０の手元近くに装着した複数の多孔質弾性部材３６、３
８、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, the lock bolt 3
0, a plurality of porous elastic members 36, 3
Since the injection liquid can be reliably shielded by 8, 40, the injection liquid leaks to the outside during the injection work, and the injection liquid may not be properly filled in the gap between the lock bolt 30 and the bore hole 16. No, so as before,
There is no need to inflate the packer in any way or to prevent leakage if the packer breaks, greatly reducing the work load on site.
【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 bonding, or may be attached by winding the tape at both ends. Further, only two or four or more porous elastic members may be provided. If the lock bolt is solid and the injection liquid is injected into the borehole using an injection pipe,
As shown in FIG. 5, the injection pipe 44 is connected to the lock bolt 30A.
In addition, the necessary exhaust pipe 46 is attached with a tape or the like, and a plurality of porous elastic members 36 to 40 are attached to form the liquid injection fixing type support member 42A. The gap formed 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３０
Ｂ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３６〜４０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 lock bolt in which a borehole is drilled with a bit at the tip while rotating itself, as shown in FIG.
While the porous elastic members 36 to 40 are slightly compressed with respect to the porous elastic members 36 to 40 attached near the hand of B, a collar 50 made of a rigid thin steel pipe or a plastic pipe is detachably covered. The liquid fixing fixing type support member 42B is configured by fitting. The collar 50 has a diameter slightly smaller than the bore diameter of the bore hole so as not to hinder the drilling operation. The collar 50 covering the porous elastic members 36 to 40 can be easily removed by applying an external force and pulling it out.
【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３０Ｂ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 attached to the tip of the self-drilled lock bolt 30B. The rock is driven to a predetermined depth while excavating the rock at 56 (see FIG. 7A). At this time, the porous elastic members 36 to 40 are
Since the outer diameter is smaller than the diameter of the bore hole 16 to be bored and is protected by the strong collar 50, it does not hinder the driving operation.
40 is not damaged. In addition, 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 can be pressed by the porous elastic members 36 to
There is no escape from 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-piercing lock bolt 30B is completed, the adapter 52 and the collar 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. When driving the self-piercing lock bolt 30B, the porous elastic members 36 to
Since the collar 50 is put on the 40, the porous elastic members 36 to 40 are not damaged and the gap can be reliably closed.
【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 interior of the self-drilling lock bolt 30B (see FIG. 7 (4)), the injection liquid is reliably injected into the bore hole 16 in the same manner as in the first embodiment. , And are retained and cured to achieve the desired support strength. When using a self-drilling lock bolt as the liquid fixing type support member main body,
The color need not always 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. The same components as those in FIG. 1 are denoted by the same reference numerals. In the liquid injection fixing type support member 42C shown in FIG. 8, the lock bolt 30 includes a portion between the porous elastic members 36 and 38,
In addition, the ejection ports 58 and 60 are also formed at locations corresponding to the positions between the porous elastic members 38 and 40.
【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５
８、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 description will be given of a use state of the liquid fixing type support member 42C in the second embodiment. When the insertion and driving of the liquid fixing type support member 42C are completed, the gap between the borehole 16 and the lock bolt 30 is relatively gently shielded by the porous elastic members 36 to 40 by the elastic restoring force (FIG. 8 (1)). )reference). Thereafter, when the injection liquid is injected from the near side of the lock bolt 30 through the injection port 32, first, the injection port 5
The injection liquid enters the third space C between the porous elastic members 36 and 38 and the second space B between the porous elastic members 38 and 40 from 8 and 60, and also penetrates into the porous elastic members 36 to 40. I do.
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 penetration speed is low, 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。Thereafter, the injection liquid enters the borehole 16 from the ejection ports 32, 34 such as the tip of the lock bolt 30, and is located between the borehole 16 and the lock bolt 30 on the tip side of the porous elastic member 36 closest to the tip. One space A is filled with the injection solution (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. However, since the area covering the plurality of porous elastic members 36 to 40 has already been hardened, a sufficient shielding effect is exhibited. And the injected liquid does not leak out, and the first space A
The inside can be reliably filled with the injection 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 operation 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 injection liquid in the borehole 16 is hardened, the lock bolt 30 and the periphery of the inner wall of the tunnel are integrally fixed and supported by the solid inner rock struck at the tip of the lock bolt, thereby causing the collapse of the periphery of the inner wall. 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。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。According to the second embodiment, the plurality of porous elastic members 36 mounted near the hand of the lock bolt 30 are also provided.
Since the injection liquid can be reliably shielded by the injection holes 38 and 40, the injection liquid leaks to the outside during the injection operation, and the injection liquid is not sufficiently filled in the gap between the lock bolt 30 and the borehole 16. Therefore, it is not necessary to inflate the packer in any way or to prevent leakage when the packer is torn, unlike the conventional case, and the work load on the site is greatly reduced. Note that the number of the ejection ports provided between the porous elastic members may be one or more than one in each of the second and third spaces B and C.
【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、６４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 by using an injection pipe, as shown in FIG. 9, the injection pipe 44 includes a portion between the porous elastic members 36 and 38 and a portion between the porous elastic members 38 and 40. The injection ports 62 and 64 may be provided at a position corresponding to the space between the injection pipes 440 and 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 locations corresponding to the positions between the elastic members 38 and 40, the ejection ports 62 and 64 are temporally removed from the first space (see FIG. First, the range of the porous elastic members 36 to 40 is hardened, and the infusate 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、３
８、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 use state of the third embodiment according to the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals. In the liquid injection fixing type support member 42D of FIG. 11, the porous elastic members 36, 3
Spouts 66, 68, 70 are drilled at locations corresponding to 8, 40.
【００４０】図１１を参照して注液定着式支保部材４２
Ｄ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１
６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６６〜７
０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）。Referring to FIG. 11, a liquid fixing type support member 42 is provided.
The usage state of D will be described. After the insertion and driving of the liquid fixing type support member 42D, the borehole 1 is elastically restored.
6 and the lock bolt 30 have a porous elastic member 36.
４０40 relatively gently shielded (FIG. 11
(See (1)). Thereafter, when the injection liquid is injected from the near side of the lock bolt 30, first, the ejection ports 66 to 7 near the hand.
The injection liquid permeates into each of the porous elastic members 36 to 40 from zero. 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 penetration speed is low, 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。Thereafter, the injection liquid enters the borehole 16 from the ejection ports 32 and 34 such as the tip of the lock bolt 30, and the first space A between the porous elastic member 36 closest to the tip is filled with the injection liquid. (See FIG. 11 (3)). When the first space A is filled with the infusion liquid, a high pressure is applied to the porous elastic members 36. However, the curing of each of the porous elastic members 36 to 40 has already progressed to some extent. Spouts 66-70 with infused liquid penetrated into elastic members 36-40
Is 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 infusate does not leak out. Therefore, the borehole 16 stays and hardens while 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。The operation 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 injection liquid in the borehole 16 is hardened, the lock bolt 30 and the periphery of the inner wall of the tunnel are integrally fixed and supported by the solid inner rock struck at the tip of the lock bolt, thereby causing the collapse of the periphery of the inner wall. 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。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。According to the third embodiment, the plurality of porous elastic members 36 mounted near the hand of the lock bolt 30 are also provided.
Since the injection liquid can be reliably shielded by the injection holes 38 and 40, the injection liquid leaks to the outside during the injection operation, and the injection liquid is not sufficiently filled in the gap between the lock bolt 30 and the borehole 16. Therefore, it is not necessary to inflate the packer in any way or to prevent leakage when the packer is torn, unlike the conventional case, and the work load on the site is greatly reduced. It should be noted that the spout provided at the position of the porous elastic member has one porous elastic member.
It may be a plurality or a plurality.
【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
〜７６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７２〜７
６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１１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 by using the injection pipe, as shown in FIG.
The ejection port 72 is provided at a position corresponding to the porous elastic members 36 to 40.
As shown in FIG. 13, the injection ports 72 to 7 are provided at positions corresponding to the porous elastic members 36 to 40 in the injection pipe 440 provided separately from the injection pipe 44 as shown in FIG.
If the sixth elastic member 6 is provided, similarly to the third embodiment of FIG. 11, the range of the porous elastic members 36 to 40 is hardened temporally earlier than the first space (see A of FIG. 11). The filling liquid filled in one space can be reliably retained and hardened.
【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, and a portion corresponding to each of the porous elastic members 36 to 40 in the lock bolt (see FIG. 14) or the injection hype (not shown) is provided. The ejection ports 58, 60, 66 to 70 are provided at locations corresponding to both the positions of the respective porous elastic members 36, 38, 40.
May be provided. Further, in each of the above-described embodiments and modifications, three porous elastic members are provided. However, in the first and second embodiments and the modifications thereof, two or four porous elastic members are provided.
The number may be one or more, and in the third embodiment and its modifications, one, two or four or more may be used.
【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 modified examples, the lock bolt used in the tunnel construction by the NATOM method has been described as an example, but the anchor used in the retaining wall construction, the ground improvement work, the ground reinforcement work, etc. The present invention can be similarly applied to other types of liquid injection fixing type support member main bodies such as a grout tube to be used.
【００４７】[0047]
【考案の効果】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 are provided near the hand of the liquid fixing type support member main body so as to surround the outer peripheral surface while being spaced apart in the axial direction. When the liquid fixing type supporting member is driven into the ground, the porous elastic member is compressed, and the gap between the bore hole and the liquid fixing type supporting member main body is loosely sealed by the elastic restoring force. In this state, if the injection liquid is injected into the borehole by passing through the liquid fixing type support member main body or through an injection pipe, the most porous hole between the liquid injection fixing type support member main body and the borehole is formed. The first space on the distal end side as viewed from the elastic material is filled with the injection liquid, and a part of the liquid penetrates into the ground. Then, the injection liquid receives a weak initial pressure from the injection liquid, and the injection liquid penetrates into the porous elastic member closest to the front end. However, the initial permeation speed is slow because of the resistance from the porous elastic member. After that, when the injection liquid is filled in the first space and the pressure is increased, since the injection liquid is filled in the porous elastic member in a clogged state, and the curing is advanced to some extent, the pressure resistance is increased. Is high, the infusate does not leak out at once, and when not completely cured in the porous elastic member, a part of the porous elastic member is closest to the tip and the second is the second. Gradually leaks into the second space between
It only penetrates the porous elastic member closest to the tip. Since the pressure in the second space is much weaker than that in the first space, and the penetration speed into the porous elastic member near the tip is considerably slow second, the stagnation and hardening progress in the second space, and Secondly, the hardening of the injection liquid proceeds in the porous elastic member near the front end. When completely cured, a large pressure resistance is generated, so that the infused liquid in the second space does not leak to the outside, and accordingly, the permeation of the infused liquid into the porous elastic member closest to the tip also stops, Since the porous elastic member is also hardened and exerts a large pressure resistance, the first space can be reliably filled with the infusate, retained and hardened, and the desired support strength can be realized. The second space is filled with the infusate and the pressure is increased before the infusion liquid is hardened in the second-most porous elastic member. Even if it leaks into the space closer to the hand, the amount is no longer small, and when the third porous elastic member is present, the leakage of the infusate to the outside is performed in the same manner as the second porous elastic member. Will be 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。As described above, the injection liquid can be reliably shielded by the plurality of porous elastic members mounted near the hand of the injection fixing type support member main body.
The injected liquid does not leak to the outside, and the filling of the injected liquid does not occur in the gap between the liquid injection fixing type support member main body and the borehole, so that the packer is expanded or the packer is broken as in the conventional case. In such a case, it is not necessary to prevent leakage or to fill the waste and the quick-setting cement as in the case of the self-piercing type of the liquid fixing type support member body, so that the work load on the 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 fixing type supporting member having a liquid 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 a tip or the like, a liquid fixing type Near the hand of the support member main body, a plurality of porous elastic members mounted so as to wrap the outer peripheral surface while being spaced apart in the axial direction are provided, and a spout is provided in the liquid fixing type support member main body between the porous elastic members. Drill. When the injection liquid is injected after the main body of the liquid injection fixing type support member is driven into the ground, first, the injection liquid enters the space between the porous elastic members from the ejection port near the hand, and the porous elastic It penetrates into the member. If the ejection port is not so large, the pressure applied to the porous elastic member is weak and the penetration speed is low, so that the curing proceeds. After that, the injection liquid enters the borehole from the spout such as the tip of the liquid fixing type support member main body, and the space on the tip side of the porous elastic member closest to the front end of the liquid fixing type support member body is filled with the injection liquid. Will be done. When the space is filled with the infusate, high pressure is applied to the porous elastic member closest to the tip, but since the area over the plurality of porous elastic members has already been hardened, a sufficient shielding effect is exhibited, and the injection is performed. The liquid does not leak out. Therefore,
Since the inside of the borehole is hardened with the filling liquid filled, it has the expected strength, so there is no need to prevent leaks or pack waste or quick-setting cement because the used packer was torn as in the past. 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 a liquid fixing type supporting member having a liquid 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 a tip or the like, a liquid fixing type is provided. Near the hand of the support member main body, one or a plurality of porous elastic members mounted so as to wrap the outer peripheral surface are provided, and a spout is formed at a location of the liquid fixing type support member main body where the porous elastic member is mounted. I set it up,
When the injection liquid is injected after the liquid injection fixing type support member main body is driven into the ground, first, the injection liquid penetrates 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 is weak and the penetration speed is low, so that the curing proceeds. Thereafter, the injection liquid enters the borehole from an ejection port such as the tip of the liquid injection fixing type support member main body, 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 infusion liquid, a high pressure is applied to the porous elastic member, but the curing of the porous elastic member has already progressed to some extent, and the infusion liquid has already penetrated the porous elastic member. The pressure of the spout also increases, and the porous elastic member is pressed against the hole wall, so that a sufficient shielding effect is exhibited, and the infusate does not leak out. Therefore, the inside of the borehole is hardened with the filling liquid filled, and the intended support strength is obtained.Therefore, as in the conventional case, the used packer has been torn, so that it will not leak or fill with rags and quick-setting cement. Work can be done easily and site work can be done 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。Also, in the liquid fixing type supporting member having a liquid 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 fixing type supporting member main body. A plurality of porous elastic members mounted so as to wrap around the outer peripheral surface while being spaced apart in the axial direction are provided near the hand of the liquid fixing type support member main body, and at least one injection pipe is provided between the porous elastic members. Since it has an opened spout, after pouring the liquid fixing type support member main body into the ground and then injecting the infused liquid through the injection pipe, first, the spout near the hand from the porous elastic member The injection liquid enters the space 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 penetration speed is low, so that the curing proceeds. Thereafter, the injection liquid enters the borehole from another injection port of the injection pipe, and the space on the tip side of the porous elastic member closest to the tip end of the liquid fixing type support member main body is filled with the injection liquid. When the space is filled with the infusate, high pressure is applied to the porous elastic member closest to the tip, but since the area over the plurality of porous elastic members has already been hardened, a sufficient shielding effect is exhibited, and the injection is performed. The liquid does not leak out. Therefore, the inside of the borehole is hardened with the filling liquid filled, and the intended support strength is obtained.Therefore, as in the conventional case, the used packer has been torn, so that it will not leak or fill with rags and quick-setting cement. Work can be done easily and site work can be done easily.
【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。Also, in the liquid fixing type supporting member having a liquid fixing type supporting member main body such as a lock bolt, an anchor, a grout tube, and one or more injection pipes mounted on the outer surface of the liquid fixing type supporting member main body. One or a plurality of porous elastic members mounted so as to wrap around the outer peripheral surface are provided near the hand of the liquid fixing type support member main body, and at least one injection pipe is opened at a position where the porous elastic member is mounted. When the injection liquid is injected through the injection pipe after the liquid injection fixing type support member main body is driven into the ground, first, the injection liquid near the hand is inserted into each porous elastic member. The infusate penetrates. If the ejection port is not so large, the pressure applied to the porous elastic member is weak and the penetration speed is low, so that the curing proceeds. Thereafter, the injection liquid enters the borehole from another injection port of the injection pipe, and the space between the injection pipe and the porous elastic member is filled with the injection liquid.
When the space is filled with the infusion liquid, a high pressure is applied to the porous elastic member, but the curing of the porous elastic member has already progressed to some extent, and the infusion liquid has already penetrated the porous elastic member. The pressure of the spout also increases, and the porous elastic member is pressed against the hole wall, so that a sufficient shielding effect is exhibited, and the infusate does not leak out. Therefore, the inside of the borehole is cured with the filling liquid filled,
Since the desired strength of the support is obtained, it is not necessary to prevent leaks due to the used packer being torn or to fill with rags and quick-setting cement as in the conventional case, so that on-site work can be easily performed.
【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 fixing type support 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 view of a method of attaching a porous elastic member to 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 use 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 use 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 modification 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 fixing type support 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 an explanatory diagram of a use 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 an explanatory view of a use 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 modified example 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 view of a use 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 configuration diagram of another modified example 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 support member obtained by combining the second embodiment and the third embodiment.
【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 view showing an example of use of a conventional lock bolt.
【図１６】図１５中のパッカーの構成図である。FIG. 16 is a configuration diagram of a 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 Injection port 42, 42A, 42B, 42C, 42D Injection fixing type support member 44, 440 Injection pipe
Claims (5)
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注入
液浸透特性を備えた多孔質弾性部材を設け、該複数の多
孔質弾性部材によってボアホール内に複数の空間を形成
するようにしたこと、 を特徴とする注液定着式支保部材。A liquid fixing type supporting member having a liquid fixing type supporting member main body such as a lock bolt, an anchor, and a grout pipe inserted into a borehole , wherein a shaft is provided near a hand of the liquid fixing type supporting member main body. Multiple injections that are wrapped around the outer circumference with spacing in the direction
Provided a porous elastic member having a liquid permeation characteristics, the plurality of multi
Multiple spaces are formed in the borehole by the porous elastic member
A liquid fixing type supporting member, characterized in that:
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注入
液浸透特性を備えた多孔質弾性部材を設け、該複数の多
孔質弾性部材によってボアホール内に複数の空間を形成
するようにし、かつ、 多孔質弾性部材間の注液定着式支保部材本体に前記空間
への注入液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 support member having a liquid injection fixing type support member main body such as a lock bolt, an anchor, a grout tube, etc., which is hollow and has one or a plurality of ejection ports at its tip or the like inserted into a borehole. A plurality of injections installed near the hand of the liquid injection fixing type support member main body so as to wrap the outer peripheral surface while leaving an interval in the axial direction
Provided a porous elastic member having a liquid permeation characteristics, the plurality of multi
Multiple spaces are formed in the borehole by the porous elastic member
And the space is provided in the main body of the liquid fixing type support member between the porous elastic members.
A liquid injection fixing support member, characterized in that a liquid injection port is formed in the liquid injection fixing member.
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 fixing type supporting member having a liquid 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 a tip or the like. Near the hand of the support member main body, one or a plurality of porous elastic members mounted so as to wrap the outer peripheral surface are provided, and a jet port is formed at a position of the liquid fixing type support member main body where the porous elastic member is mounted. A liquid injection fixing type support member, characterized in that:
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注入
液浸透特性を備えた多孔質弾性部材を設け、該複数の多
孔質弾性部材によってボアホール内に複数の空間を形成
するようにし、かつ、 少なくとも１つの注入パイプの多孔質弾性部材間に前記
空間への注入液噴出口を設けたこと、 を特徴とする注液定着式支保部材。4. A liquid injection fixing support member main body such as a lock bolt, an anchor, or a grout pipe inserted into a borehole, and one or more injection pipes mounted on an outer surface of the liquid injection fixing type support member main body. In the liquid fixing type support member, a plurality of injections are installed near the hand of the liquid fixing type support member main body so as to wrap the outer peripheral surface with an interval in the axial direction.
Provided a porous elastic member having a liquid permeation characteristics, the plurality of multi
Multiple spaces are formed in the borehole by the porous elastic member
To make it in, and the between the porous elastic member of at least one filler pipe
A liquid injection fixing type support member , wherein a liquid injection port is provided to a space .
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 fixing type supporting member having a liquid 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 an outer surface of the liquid fixing type supporting member main body. One or a plurality of porous elastic members mounted so as to wrap the outer peripheral surface are provided near the hand of the liquid injection fixing type support member main body, and at least one injection pipe is opened at a position where the porous elastic member is mounted. A liquid injection fixing type support 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 JPH074600U (en) | 1995-01-24 |
| JP2553336Y2 true JP2553336Y2 (en) | 1997-11-05 |
Family
ID=12436611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993035251U Expired - Fee Related JP2553336Y2 (en) | 1993-06-29 | 1993-06-29 | Injection fixing type support member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2553336Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101579234B1 (en) | 2014-04-08 | 2015-12-21 | 김현주 | Protecting part of ending area for expanding type rockbolt |
Families Citing this family (3)
| 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 |
| 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 |
| JP4336169B2 (en) * | 2003-09-10 | 2009-09-30 | 西松建設株式会社 | How to install rock bolts |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4419635Y1 (en) * | 1964-09-30 | 1969-08-22 | ||
| JPS63233199A (en) * | 1987-03-20 | 1988-09-28 | 大阪鋼管株式会社 | Method of lock bolt construction |
-
1993
- 1993-06-29 JP JP1993035251U patent/JP2553336Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101579234B1 (en) | 2014-04-08 | 2015-12-21 | 김현주 | Protecting part of ending area for expanding type rockbolt |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH074600U (en) | 1995-01-24 |
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