JPH0288897A - Packer - Google Patents
PackerInfo
- Publication number
- JPH0288897A JPH0288897A JP24038388A JP24038388A JPH0288897A JP H0288897 A JPH0288897 A JP H0288897A JP 24038388 A JP24038388 A JP 24038388A JP 24038388 A JP24038388 A JP 24038388A JP H0288897 A JPH0288897 A JP H0288897A
- Authority
- JP
- Japan
- Prior art keywords
- packer
- hole
- bag
- discharge openings
- circumferential surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 3
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 229920002803 thermoplastic polyurethane Polymers 0.000 abstract description 22
- 239000012466 permeate Substances 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract 3
- 229920005989 resin Polymers 0.000 abstract 3
- 238000007493 shaping process Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000000126 substance Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 239000004744 fabric Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000007596 consolidation process Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、軟弱あるいは破砕された岩盤等を岩盤固結
用薬液により堅固な岩盤に改善する岩盤固結に使用する
パッカーに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a packer used for rock consolidation, which improves soft or crushed rock, etc., into solid rock using a rock consolidation chemical.
従来から軟弱な岩盤（地山）または破砕された他山等の
地層帯では、トンネル切羽の天盤の崩落等の防止のため
に、トンネル切羽先端の天盤部に、天盤のアーチに沿っ
て孔を穿設し、この孔内にロックボルトを挿入もしくは
このボルトをモルタルで固結す゛る先受ボルト工法、ま
たはパイプルーフ工法、薬液注入工法等の対応方法が講
じられ、地山を強化することが行われている。しかしな
がら、このような従来の対応方法では、設備が大損りと
なり、機械の設置や注入の準備に手間がかがり、またこ
れらの作業のために現場の作業をかなりの期間停止しな
ければならないという問題を生じていた。In order to prevent the top of the tunnel face from collapsing, etc., in geological zones such as soft rock (grounds) or crushed mountains, we have installed a roof at the tip of the tunnel face along the arch of the top. Countermeasures such as the advance bolt method, which involves drilling a hole and inserting a rock bolt into the hole or solidifying the bolt with mortar, the pipe roof method, and the chemical injection method, are used to strengthen the ground. things are being done. However, this conventional method causes major damage to equipment, requires time and effort to install machines and prepare for injection, and requires the on-site work to be stopped for a considerable period of time. was occurring.
そこで、本発明者らは、このような問題を解決するため
、削岩機等の削岩装置を用い、トンネル切羽先端の天盤
部に天盤のアーチに沿って複数の孔を穿設し、この孔内
に、先端側に吐出孔を有する中空パイプからなるパッカ
ーを挿入し、そのパッカー内にウレタン樹脂液等の薬液
を圧入してパッカー先端側から外部に吐出し岩盤に浸透
させる技術をすでに提案している（特願昭５８−１４４
０２４号）。この場合、上記薬液の孔からの洩れを防ぐ
とともにパッカーを孔内に固定する目的で、パッカーの
根元側に布等を巻きつけ、これにウレタン樹脂液等を含
浸させ、パッカーの挿入時に上記布等に含浸させたウレ
タン樹脂を発泡させ、孔の壁面とパッカーの外周部との
隙間を防ぐと同時にパッカーを孔壁に固定するというこ
とが行われている。Therefore, in order to solve this problem, the present inventors used rock drilling equipment such as a rock drill to drill multiple holes along the arch of the ceiling at the tip of the tunnel face. In this hole, a packer consisting of a hollow pipe with a discharge hole at the tip is inserted, and a chemical solution such as urethane resin is pressurized into the packer and discharged from the tip of the packer to the outside and penetrated into the rock. It has already been proposed (patent application 1986-144)
No. 024). In this case, in order to prevent the chemical solution from leaking from the hole and to fix the packer in the hole, a cloth or the like is wrapped around the base of the packer, and this is impregnated with urethane resin liquid, etc., and when the packer is inserted, the cloth is A method of foaming a urethane resin impregnated with a hole, etc., to prevent a gap between the wall of the hole and the outer periphery of the packer, and at the same time to fix the packer to the wall of the hole.
しかしながら、上記パッカーを、湧水等のある軟弱な地
山で使用すると、パッカーの根元側の布等に含浸された
ウレタン樹脂が発泡してパッカー外周と孔の壁面との空
間を埋め、さらに岩盤に浸透し硬化してパッカーを孔壁
面に固定するまでに、湧水によってパッカーが孔から押
し流されてしまうという問題を生じる。また、湧水によ
って、穿設した孔が崩壊しかかった場合には、パッカー
の根元側に巻かれた布等が孔の縁に引つ掛かかつて、パ
ッカーを孔内に挿入しにくくなる。その結果、パッカー
の挿入に長時間を要し、その間に布等に含浸されたウレ
タン樹脂が硬化してしまうという問題がある。However, when the above packer is used in soft ground with spring water, etc., the urethane resin impregnated in the cloth at the base of the packer foams and fills the space between the outer periphery of the packer and the wall of the hole. A problem arises in that the packer is washed away from the hole by the spring water before it penetrates and hardens to fix the packer to the hole wall. Furthermore, if the drilled hole begins to collapse due to spring water, the cloth wrapped around the base of the packer gets caught on the edge of the hole, making it difficult to insert the packer into the hole. As a result, it takes a long time to insert the packer, and the urethane resin impregnated into the cloth or the like hardens during that time.
この発明は、このような事情に鑑みなされたもので、湧
水等のある軟弱な他山でも使用でき、確実に効果を奏し
うるパッカーの提供をその目的とする。The present invention was made in view of the above circumstances, and its purpose is to provide a packer that can be used even on soft mountains with spring water, etc., and can be reliably effective.
上記の目的を達成するため、この発明のパッカーは、先
端側に第１の吐出孔を有する中空パイプ状体の根元側周
面に第２の吐出孔を形成し、この根元側外周面を囲うよ
うに通液性シート材を配設しその両端部を上記根元側外
周面に固定することにより通液性袋体に形成したという
構成をとる。In order to achieve the above object, the packer of the present invention has a hollow pipe-like body having a first discharge hole on the tip side, and a second discharge hole is formed on the root side peripheral surface of the hollow pipe-like body, and the second discharge hole is formed on the root side outer peripheral surface of the hollow pipe-like body. The structure is such that a liquid-permeable bag is formed by disposing a liquid-permeable sheet material and fixing both ends thereof to the outer circumferential surface on the root side.
［作用］
すなわち、このパッカーは、上記のように、根元側外周
面に第２の吐出孔が形成され、さらにその外周面を囲っ
た状態で通液性袋体が取付けられている。したがって、
パッカーを岩盤に穿孔した孔内に挿入し、その状態で、
パッカーの根元側からウレタン樹脂液等の岩盤固結用薬
液を注入すると、まず、その注入圧力で瞬間的に上記通
液性袋体が膨張し孔壁面に圧接すると同時に、その通液
性袋体の外周面から岩盤に向かって上記岩盤固結液が浸
透し、そこで固結する。ついで、続いてバンカー内に送
られてくる岩盤固結用薬液がパッカーの先端側の第１の
吐出孔から孔内に吐き出され岩盤に浸透し固結する。そ
の結果、湧水等のある軟弱な地山でもパッカーを確実に
固定できるとともに、岩盤に穿孔した孔の開口を完全に
閉塞した状態で孔の奥側に岩盤固結用薬液を吐出できる
ようになる。また、上記パッカーを岩盤の孔に挿入する
際には、通液性袋体をしぼませた状態にすることができ
るため、湧水によって、穿設した孔が崩壊しかかった場
合でも、容易にパッカーを孔内に挿入できるようになる
。[Function] That is, as described above, in this packer, the second discharge hole is formed on the outer circumferential surface of the root side, and the liquid-permeable bag body is attached to surround the outer circumferential surface. therefore,
Insert the packer into the hole drilled in the rock, and in that state,
When a rock solidification chemical such as urethane resin liquid is injected from the root side of the packer, the liquid-permeable bag instantly expands under the injection pressure and comes into pressure contact with the hole wall, and at the same time, the liquid-permeable bag expands. The rock solidification liquid permeates from the outer peripheral surface toward the bedrock and solidifies there. Next, the rock solidification chemical liquid subsequently sent into the bunker is discharged into the hole from the first discharge hole on the tip side of the packer, penetrates into the rock, and solidifies. As a result, the packer can be securely fixed even in soft ground with spring water, etc., and the chemical solution for rock consolidation can be discharged to the back of the hole while completely blocking the opening of the hole drilled in the bedrock. Become. In addition, when inserting the packer into a hole in the rock, the liquid-permeable bag can be deflated, so even if the hole is about to collapse due to spring water, it can be easily removed. The packer can now be inserted into the hole.
つぎに、この発明を実施例にもとづいて詳しく説明する
。Next, the present invention will be explained in detail based on examples.
［実施例］ 第１図は、この発明の一実施例を示している。[Example] FIG. 1 shows an embodiment of the invention.
すなわち、図において、ｌは後端が開口した中空パイプ
状のパッカー本体であり、外径２７ｍｍ、内径１４ｍｍ
で全長が略２ｍに設定されている。このバッカー本体１
は、先端が尖っていて、先端例の周面に複数の第１の吐
出孔２が所定間隔で穿設されている。そして、根元側（
後端側）の周面には、第２図に示すように、上記第１の
吐出孔２よりもやや大径の複数の第２の吐出孔３が所定
間隔で穿設され、その周囲に綿製のメリヤスからなる袋
部４が巻かれている。上記袋部４は、二重構造になって
おり、筒状の布４ａ、４ｂを２枚重ね合わせてバッカー
本体１の根元側に外嵌し、それらの後端側を、ビニール
テープ５とＣＶバンド６でバッカー本体１の外周面に固
定したのち、全体を反転させて前端側をバッカー本体１
の後端側に移動させ、反転して後側になった筒状布４ａ
、４ｂの部分をビニールテープ５とＣ■バンド６とでバ
ッカー本体１の外周面に固定することにより構成されて
いる。なお、上記袋部４は、全体の長さが５０ｃ＋ｎで
、先端内側の折り返し部分の長さが１０ｃｍに設定され
ている。また、上記バッカー本体１は、略中央部を境に
して前部側と後部側とに２分割されており、これらをね
じ継手（図示せず）で継合して構成されている。そして
、上記前部側における継合部分の内周側に段部が設けら
れ、そこに第３図（ａ）、（ｂ）に示す静止ミキサー７
が先端側（図示の左側部分）をパッカー本体１の先端側
に向けた状態で挿入され根元側リング８を上記段部に係
合させて固定されている。上記静止ミキサー７には、根
元側リング部８の中心から前方（矢印Ｘ方向）に延びる
線状中心軸７ａを中心に、左半分にＶ字状２重羽根７ｂ
が一定間隔で傾斜配設され、右半分には１重羽根７Ｃが
一定間隔で傾斜配設され、パッカー本体１内に圧入され
たウレタン樹脂のＡ液およびＢ液をそれぞれ左半分、右
半分に受は入れ上記両液を同方向（矢印Ａ、Ｂ方向）に
旋回させながら移送するようになっている。この場合、
右半分には１重羽根７Ｃ１左半分にはＶ字状２重羽根７
ｂが設けられ、ウレタン樹脂が右半分から左半分に旋回
移行すると、入口側が広く出口側が狭隘になっているＶ
字状２重羽根７ｂの作用によって流速が速められ、左半
分から右半分に戻ると初期速度に戻る。すなわち、Ａ液
。That is, in the figure, l is a hollow pipe-shaped packer body with an open rear end, and has an outer diameter of 27 mm and an inner diameter of 14 mm.
The total length is set to approximately 2m. This backer body 1
The tip has a pointed tip, and a plurality of first discharge holes 2 are bored at predetermined intervals on the circumferential surface of the tip. And the root side (
As shown in FIG. 2, a plurality of second discharge holes 3 having a slightly larger diameter than the first discharge hole 2 are bored at predetermined intervals on the peripheral surface of the rear end side. A bag portion 4 made of cotton stockinette is wrapped around it. The bag portion 4 has a double structure, in which two cylindrical cloths 4a and 4b are overlapped and fitted onto the base side of the backer main body 1, and the rear ends thereof are wrapped with vinyl tape 5 and CV After fixing the band 6 to the outer peripheral surface of the backer body 1, turn the whole thing over and attach the front end side to the backer body 1.
The cylindrical cloth 4a was moved to the rear end side and reversed to become the rear side.
, 4b are fixed to the outer circumferential surface of the backer main body 1 with a vinyl tape 5 and a C-band 6. The bag portion 4 has an overall length of 50c+n, and the length of the folded portion inside the tip is set to 10cm. Further, the backer main body 1 is divided into two parts, a front side and a rear side, with a substantially central portion as a boundary, and these parts are connected by a threaded joint (not shown). A stepped portion is provided on the inner peripheral side of the joint portion on the front side, and the static mixer 7 shown in FIGS. 3(a) and 3(b)
is inserted with its distal end (the left side in the figure) facing toward the distal end of the packer body 1, and the root ring 8 is engaged with and fixed to the stepped portion. The stationary mixer 7 has a V-shaped double blade 7b on the left half centered on a linear central axis 7a extending forward (in the direction of arrow X) from the center of the root side ring part 8.
are arranged at an inclination at regular intervals, and single-ply blades 7C are arranged at an inclination at a regular interval on the right half, and the urethane resin liquids A and B press-fitted into the packer body 1 are transferred to the left and right halves, respectively. The receiver is configured to transfer both liquids while rotating them in the same direction (directions of arrows A and B). in this case,
The right half has a single blade 7C1 The left half has a V-shaped double blade 7
b is provided, and when the urethane resin rotates from the right half to the left half, the inlet side is wide and the outlet side is narrow.
The flow velocity is increased by the action of the character-shaped double vane 7b, and returns to the initial velocity when returning from the left half to the right half. That is, liquid A.
ＢＷＬは左半分、右半分の流速の差により、同方向に旋
回しながらミキシングされるのであり、注入時の初期流
速を維持したままミキシングされ前方に送られる。した
がって、硬化の著しく速いウレタン樹脂を圧入する場合
においてウレタン樹脂を途中で硬化させることなくミキ
シング移送し先端から円滑に吐出させうるようになって
いる。また、パッカー本体１の後端には逆止弁付継手（
図示せず）をら合するためのねじ部が形成されている。The BWL is mixed while rotating in the same direction due to the difference in flow velocity between the left half and the right half, and is mixed and sent forward while maintaining the initial flow velocity at the time of injection. Therefore, when press-fitting a urethane resin that hardens extremely quickly, the urethane resin can be mixed and transferred without being hardened midway, and can be smoothly discharged from the tip. In addition, at the rear end of the packer body 1, there is a joint with a check valve (
(not shown) is formed with a threaded portion for mating.
この構成において、まず、削岩機等を用いて、トンネル
切羽先端の天盤部に上向き（角度θ＝１０〜２０°）の
状態で孔を穿設し、パッカー本体１の後端部に、ウレタ
ン樹脂圧入ポンプのホース（図示せず）を連結する。つ
いで、第４図に示すように、天盤部９に設けた孔の中に
、袋部４を折り畳んでしぼませた状態のパッカーを挿入
すると同時に、パッカー本体１の後端側から第２の吐出
孔３を通して袋部４にウレタン樹脂を圧入する。In this configuration, first, using a rock drill or the like, a hole is drilled in the ceiling section at the tip of the tunnel face in an upward direction (angle θ = 10 to 20 degrees), and at the rear end of the packer main body 1. Connect the hose (not shown) of the urethane resin press-in pump. Next, as shown in FIG. 4, the packer with the bag part 4 folded and deflated is inserted into the hole provided in the top plate part 9, and at the same time a second packer is inserted from the rear end side of the packer main body 1. Urethane resin is press-fitted into the bag portion 4 through the discharge hole 3.
その結果、第５図に示すように、袋部４は瞬間的に膨張
して、その表面が孔の壁面に圧接し１．パッカー本体１
の外周部と孔の壁面との隙間を塞ぐ。As a result, as shown in FIG. 5, the bag portion 4 instantaneously expands and its surface comes into pressure contact with the wall of the hole.1. Packer body 1
Close the gap between the outer periphery of the hole and the wall of the hole.
それと略同時に、袋部４の表面からウレタン樹脂が滲み
でて天盤部９の鎖線Ｃの部分まで浸透し、そこで硬化す
る。これによってパッカー本体１は上記孔壁に固定され
、湧水等によって流出してなくなる。この際、袋部４が
二重に構成されているため、湧水等が勢いよく出ていて
も、すぐには内袋４ｂ内には到達せず、したがって、湧
水による上記袋部４の膨脹阻害は回避される。このよう
にしてパッカー本体ｌが固定され、かつパッカー本体１
と孔壁との隙間も塞がれた段階で、続いてパッカー本体
１内に圧入されるウレタン樹脂が、パッカー本体ｌ先端
側の第１の吐出孔２から孔内に吐出し、孔の奥側に対応
する天盤部９の鎖線りの部分に浸透し硬化する。このよ
うにしてウレタン樹脂の固結領域を、第６図に示すよう
に天盤部９の天井部に、または第７図に示すように天盤
部９のアーチに沿って連続的に形成することにより、パ
ッカー本体１を残置したままで天盤部９の補強がなされ
る。第６図および第７図において、ＩＯはパッカー本体
ｌに対する薬液の接合ユニット、１１はそのホース、１
２は支保工、１３は固結領域である。At approximately the same time, the urethane resin oozes out from the surface of the bag portion 4, penetrates into the portion of the top plate portion 9 indicated by the chain line C, and hardens there. As a result, the packer main body 1 is fixed to the hole wall, and the packer body 1 is washed away by spring water or the like. At this time, since the bag portion 4 is double-layered, even if spring water etc. flows out vigorously, it does not reach the inside of the inner bag 4b immediately, so that the bag portion 4 due to the spring water Intension inhibition is avoided. In this way, the packer body 1 is fixed, and the packer body 1
At the stage when the gap between the hole and the hole wall is also closed, the urethane resin that is press-fitted into the packer body 1 is discharged into the hole from the first discharge hole 2 on the tip side of the packer body 1, and the urethane resin is discharged into the hole from the first discharge hole 2 on the tip side of the packer body 1. It penetrates into the dotted line portion of the top plate portion 9 corresponding to the side and hardens. In this way, a solidified region of the urethane resin is continuously formed on the ceiling of the top plate 9 as shown in FIG. 6 or along the arch of the top plate 9 as shown in FIG. As a result, the top plate portion 9 can be reinforced while the packer main body 1 remains in place. In FIGS. 6 and 7, IO is a unit for connecting the chemical solution to the packer body l, 11 is its hose, 1
2 is the shoring, and 13 is the consolidation area.
このように、この発明のパッカーば、袋部４をしぼませ
た状態で、孔内に挿入でき、挿入後、直ちに袋部４に速
硬性のウレタン樹脂を圧入して袋部４を膨らませ、かつ
薬液を浸透させるようにしている。したがって、パッカ
ーを孔内に容易に挿入できるとともに、湧水等のある地
山であっても、湧水に流されることなく、迅速にパッカ
ー本体Ｉを孔内に固定でき、かつパッカー本体ｌと孔壁
との隙間を塞ぐことができる。その結果、パッカー工法
が従来不可能とされていた湧水の多い軟弱地盤地帯に対
しても応用可能となる。また、袋部４が二重になってい
るため、湧水による袋部４の膨脹阻害は回避される。As described above, the packer of the present invention can be inserted into the hole with the bag portion 4 in a deflated state, and immediately after insertion, a fast-curing urethane resin is press-fitted into the bag portion 4 to inflate the bag portion 4. This allows the chemical solution to penetrate. Therefore, the packer can be easily inserted into the hole, and even if the ground has spring water, the packer body I can be quickly fixed in the hole without being washed away by the spring water. It can close the gap with the hole wall. As a result, the packer method can be applied to areas with a lot of spring water and soft ground, which was previously considered impossible. Furthermore, since the bag portion 4 is double-layered, the expansion of the bag portion 4 is prevented from being inhibited by spring water.
なお、ウレタン樹脂が第２の吐出孔３から袋部４内に吐
出しにくい場合は、パッカー本体１の略中央部に圧力に
より容易に破裂する皮膜等を設けておいてもよい。これ
により、袋部４内にウレタン樹脂が充分に圧入されたの
ち、その圧力によつて上記皮膜が破裂し、バッカー本体
１の先端側へウレタン樹脂が進行するようになる。その
結果、袋部４内へのウレタン樹脂の圧入がより完璧にな
る。In addition, if the urethane resin is difficult to discharge from the second discharge hole 3 into the bag portion 4, a film or the like that can be easily ruptured by pressure may be provided approximately at the center of the packer body 1. As a result, after the urethane resin is sufficiently press-fitted into the bag portion 4, the film ruptures due to the pressure, and the urethane resin advances toward the tip side of the backer body 1. As a result, the urethane resin can be press-fitted into the bag portion 4 more perfectly.
［発明の効果］
この発明のパッカーは以上のように構成されているため
、湧水の多い軟弱な地盤に対しても使用でき、適用範囲
が極めて広くなる。[Effects of the Invention] Since the packer of the present invention is configured as described above, it can be used even on soft ground with a lot of spring water, and the range of application is extremely wide.
第１図はこの発明の一実施例の正面図、第２図はその要
部断面図、第３図（ａ）は静止ミキサーの斜視図、第３
図（ｂ）はその側面図、第４図および第５図はバッカー
の使用説明図、第６図はその施工状態を示す継断面図、
第７図はその横断面図である。
１・・・パッカー本体 ２・・・第１の吐出孔 ３・・
・第２の吐出孔 ４・・・袋部
特許出願人 東海ゴム工業株式会社
代理人 弁理士 西 藤 征 彦
第
図（ａ）
第
図（ｂ）FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a sectional view of the main part thereof, FIG. 3(a) is a perspective view of a static mixer, and FIG.
Figure (b) is its side view, Figures 4 and 5 are illustrations for explaining the use of the backer, Figure 6 is a cross-sectional view of the joint showing its construction state,
FIG. 7 is a cross-sectional view thereof. 1... Packer body 2... First discharge hole 3...
・Second discharge hole 4... Bag patent applicant Tokai Rubber Industries Co., Ltd. Agent Patent attorney Yukihiko Nishifuji Figure (a) Figure (b)
Claims (1)
根元側周面に第２の吐出孔を形成し、この根元側外周面
を囲うように通液性シート材を配設しその両端部を上記
根元側外周面に固定することにより通液性袋体に形成し
たことを特徴とするパッカー。(1) A second discharge hole is formed on the root side circumferential surface of a hollow pipe-like body having a first discharge hole on the distal end side, and a liquid-permeable sheet material is arranged so as to surround this root side outer circumferential surface. A packer characterized in that a liquid-permeable bag is formed by fixing both ends of the packer to the outer peripheral surface on the root side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63240383A JPH079158B2 (en) | 1988-09-26 | 1988-09-26 | Packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63240383A JPH079158B2 (en) | 1988-09-26 | 1988-09-26 | Packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0288897A true JPH0288897A (en) | 1990-03-29 |
| JPH079158B2 JPH079158B2 (en) | 1995-02-01 |
Family
ID=17058672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63240383A Expired - Lifetime JPH079158B2 (en) | 1988-09-26 | 1988-09-26 | Packer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH079158B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0723100U (en) * | 1993-10-04 | 1995-04-25 | 株式会社ケー・エフ・シー | Injection material |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51130008A (en) * | 1975-05-06 | 1976-11-12 | Raito Kougiyou Kk | Method of and apparatus for improving subsoil |
| JPS5724718A (en) * | 1980-07-23 | 1982-02-09 | Raito Kogyo Kk | Improving method for soft ground |
| JPS62288213A (en) * | 1986-06-05 | 1987-12-15 | Tokai Rubber Ind Ltd | Rockbed solidifying work |
| JPH0449735A (en) * | 1990-06-18 | 1992-02-19 | Fujitsu Ltd | Alternative cut-back system |
| JPH0488738A (en) * | 1990-07-31 | 1992-03-23 | Nec Corp | System and apparatus for network fault recovery |
| JPH05227213A (en) * | 1992-02-13 | 1993-09-03 | Nec Corp | Fault detouring system for packet switchboard |
| JPH05292125A (en) * | 1992-04-06 | 1993-11-05 | Nippon Telegr & Teleph Corp <Ntt> | Bypass route changeover system and switch back system |
| JPH07177219A (en) * | 1993-12-16 | 1995-07-14 | Nec Corp | Cross-connecting device |
-
1988
- 1988-09-26 JP JP63240383A patent/JPH079158B2/en not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51130008A (en) * | 1975-05-06 | 1976-11-12 | Raito Kougiyou Kk | Method of and apparatus for improving subsoil |
| JPS5724718A (en) * | 1980-07-23 | 1982-02-09 | Raito Kogyo Kk | Improving method for soft ground |
| JPS62288213A (en) * | 1986-06-05 | 1987-12-15 | Tokai Rubber Ind Ltd | Rockbed solidifying work |
| JPH0449735A (en) * | 1990-06-18 | 1992-02-19 | Fujitsu Ltd | Alternative cut-back system |
| JPH0488738A (en) * | 1990-07-31 | 1992-03-23 | Nec Corp | System and apparatus for network fault recovery |
| JPH05227213A (en) * | 1992-02-13 | 1993-09-03 | Nec Corp | Fault detouring system for packet switchboard |
| JPH05292125A (en) * | 1992-04-06 | 1993-11-05 | Nippon Telegr & Teleph Corp <Ntt> | Bypass route changeover system and switch back system |
| JPH07177219A (en) * | 1993-12-16 | 1995-07-14 | Nec Corp | Cross-connecting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0723100U (en) * | 1993-10-04 | 1995-04-25 | 株式会社ケー・エフ・シー | Injection material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH079158B2 (en) | 1995-02-01 |
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