JPH0328526B2 - - Google Patents
Info
- Publication number
- JPH0328526B2 JPH0328526B2 JP59136362A JP13636284A JPH0328526B2 JP H0328526 B2 JPH0328526 B2 JP H0328526B2 JP 59136362 A JP59136362 A JP 59136362A JP 13636284 A JP13636284 A JP 13636284A JP H0328526 B2 JPH0328526 B2 JP H0328526B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- tip
- tube
- flow path
- valve plunger
- 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 - Lifetime
Links
- 238000002347 injection Methods 0.000 claims description 55
- 239000007924 injection Substances 0.000 claims description 55
- 239000000126 substance Substances 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 30
- 239000000243 solution Substances 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims 5
- 229940079593 drug Drugs 0.000 claims 5
- 238000009412 basement excavation Methods 0.000 claims 1
- 239000011440 grout Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【発明の詳細な説明】
「産業状の利用分野」
この発明は薬液注入装置、時に瞬結グラウトと
緩結グラウトを同一工程て交互に注入する複合注
入に最適な注入装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION ``Industrial Field of Use'' The present invention relates to a chemical injection device, which is sometimes most suitable for compound injection in which instant setting grout and slow setting grout are alternately injected in the same process.
「従来の技術」
従来、注入管の先端のグラウトモニター部に薬
液の吐出口を開閉するピストン弁、あるいは二種
の薬液を混合室内に導入して合流混合させるため
の弁孔を開閉するスプール弁を設け、各弁体を注
入薬液の圧送圧力によつて前進させると共に、薬
液の圧送中断時に弁体に装着した戻しバネによつ
て後退させることにより吐出口及び弁孔を開閉し
ながら注入を行なうようにした装置が知られてい
る。``Prior art'' Conventionally, a piston valve that opens and closes a discharge port for chemical liquids is installed in the grout monitor section at the tip of an injection pipe, or a spool valve that opens and closes a valve hole that introduces two types of chemical liquids into a mixing chamber and mixes them together. Injection is performed while opening and closing the discharge port and the valve hole by moving each valve body forward by the force-feeding pressure of the injected chemical solution, and retracting it by a return spring attached to the valve body when the force-feeding of the chemical solution is interrupted. Devices that do this are known.
「発明が解決しようとする問題点」
このように従来の注入装置においては、注入薬
液の圧送圧力により弁体を戻しバネの弾力に抗し
て移動させるため、薬液の圧送圧力及び吐出圧は
戻しバネの弾力によつて制限されると共に、弁孔
又は吐出口の開閉を薬液の圧送及び中断によつて
操作しなければならないため、複合注入などにお
いて薬液の切換え注入操作が不連続となり、しか
も薬液の圧力で弁体を前進させて弁孔又は吐出口
を開放し薬液を吐出させると、圧力減少を生じて
弁体が戻しバネにより後退し弁孔又は吐出口を閉
鎖しようとするため、弁の開閉が不安定となり、
薬液の圧送に脈動を生じやすいの等の欠点があつ
た。``Problems to be Solved by the Invention'' As described above, in the conventional injection device, the pressure of the injected chemical solution causes the valve body to return and move against the elasticity of the spring. In addition to being limited by the elasticity of the spring, the opening and closing of the valve hole or discharge port must be performed by force feeding and interrupting the chemical solution, so the switching and injection operation of the chemical solution becomes discontinuous in complex injections, etc. When the valve body is moved forward to open the valve hole or discharge port and discharge the chemical liquid at a pressure of Opening and closing becomes unstable,
There were drawbacks such as the tendency to cause pulsations when pumping the chemical solution.
また、従来の注入装置では戻しバネの装着部分
に薬液が流入するようになつているため、流入し
た薬液の硬化により戻しバネが固結されて正常な
バネ機能を失い、注入施工の断続が不可能となる
欠点もあつた。 In addition, in conventional injection devices, the chemical liquid flows into the part where the return spring is attached, so the hardening of the inflowing chemical liquid causes the return spring to solidify and lose its normal spring function, resulting in uninterrupted injection work. There were also drawbacks that made it possible.
「問題点を解決するための手段」
この発明は前記従来の課題を解決するために、
薬液以外の圧力流体により前進し、戻しバネによ
り後退する弁体を用いて弁孔を開閉させることに
より、薬液の注入圧を戻しバネの弾力に制限され
ることなく、また薬液の切換え注入時に薬液の圧
送を中断することなく安定的に連続した注入施工
を可能とし、しかも薬液による戻しバネの固結を
防止するようにした合理的な注入装置を提案する
ものである。"Means for Solving the Problems" In order to solve the above-mentioned conventional problems, the present invention has the following features:
By opening and closing the valve hole using a valve body that is moved forward by a pressure fluid other than the chemical liquid and retracted by a return spring, the injection pressure of the chemical liquid can be returned without being limited by the elasticity of the spring. The present invention proposes a rational injection device that enables stable and continuous injection work without interrupting the pressure feeding of the chemical and prevents the return spring from solidifying due to the chemical solution.
「実施例」
以下この発明を図面に示す実施例について説明
すると、図はこの発明に係る注入装置のグラウト
モニタ部の構造を示したもので、外管A、内管B
及びその内部中心に配した中心管Cの三重管構成
になつており、それぞれ後端部において所要数の
接続用の外管、内管及び中心管を順次接続するこ
とにより、所定長さの注入管を構成するようにな
つている。``Embodiment'' Below, an explanation will be given of an embodiment of the present invention shown in the drawings. The figure shows the structure of the grout monitor section of the injection device according to the invention.
It has a triple tube configuration with a central tube C placed at the center of the interior, and by sequentially connecting the required number of outer tubes, inner tubes, and center tubes at the rear end of each tube, injection of a predetermined length can be performed. It is designed to form a tube.
外管Aは、先端からドリルビツト1、逆止弁ボ
デイ2、下部注入部ボデイ3、流路ボデイ4、上
部注入部ボデイ5、継手管6等の複数の管状部材
を分解自在に連結一体化して構成されている。内
管Bは、外管Aの上部注入部ボデイ5の内部に互
いに一部を重ね合わせて前後一体に結合したバル
ブ管7a,7bと継手管8とを分解自在に連結一
体化して構成され、継手管8の外周に設けた放射
状突起又は穴あきフランジ等の突部8′を外管A
の上部注入部ボデイ3と継手管6との継手部間に
挾着固定すると共に、バルブ管7a,7bの外周
に設けた密封フランジ9a,9bを外管Aの上部
注入部ボデイ5の内周面に密接支持することによ
り固定されている。 The outer tube A has a plurality of tubular members such as a drill bit 1, a check valve body 2, a lower injection part body 3, a passage body 4, an upper injection part body 5, a joint pipe 6, etc., connected and integrated in a disassembly manner from the tip. It is configured. The inner pipe B is constructed by removably connecting and integrating valve pipes 7a and 7b and a joint pipe 8, which are integrally connected front and rear by partially overlapping each other inside the upper injection part body 5 of the outer pipe A. A protrusion 8' such as a radial protrusion or a perforated flange provided on the outer circumference of the joint pipe 8 is connected to the outer pipe A.
The sealing flanges 9a and 9b provided on the outer periphery of the valve pipes 7a and 7b are connected to the inner periphery of the upper injection body 5 of the outer tube A. It is fixed by closely supporting the surface.
更に中心管Cは、外管Aの流路ボデイ4の後端
部内に先端を位置する管体10、その先端部に連
結された密封管11、密封管11と略同外径でそ
の後方の管体10の外周に包着されたゴム又は合
成樹脂のシール部材12、及び管体10の後端に
連結された継手管13とから一体に構成され、継
手管13の外周に設けた放射状突起又は穴あきフ
ランジ等の突部13′を内管Bの後部バルブ管7
bと継手管8との継手部間に挾着固定することに
より内管Bの中心部に固定されている。 Furthermore, the central tube C includes a tube body 10 whose tip is located within the rear end of the flow path body 4 of the outer tube A, a sealed tube 11 connected to the tip, and a tube having approximately the same outer diameter as the sealed tube 11 and located behind it. A radial projection provided on the outer periphery of the joint tube 13, which is integrally constructed from a rubber or synthetic resin sealing member 12 wrapped around the outer periphery of the tube body 10 and a joint tube 13 connected to the rear end of the tube body 10. Or, attach the protrusion 13' such as a perforated flange to the rear valve pipe 7 of the inner pipe B.
It is fixed to the center of the inner tube B by being clamped between the joint portion of the inner tube B and the joint tube 8.
外管Aの継手管6及び上部注入部ボデイ5と、
内管Bの継手管8及び後部バルブ管7bとの間に
は、所定間隙の外流路14が設けられ、また内管
Bと中心管Cとの間には所定間隙の内流路15が
設けられており、各流路14,15は各管A,
B,Cにそれぞれ接続用の外管、内管及び中心管
を連結した場合に形成される外流路及び内流路に
連通するようになつている。 a joint pipe 6 of the outer pipe A and an upper injection part body 5;
An outer flow path 14 with a predetermined gap is provided between the joint pipe 8 of the inner pipe B and the rear valve pipe 7b, and an inner flow path 15 with a predetermined gap is provided between the inner pipe B and the center pipe C. Each flow path 14, 15 is connected to each pipe A,
It communicates with an outer flow path and an inner flow path formed when connecting an outer pipe, an inner pipe, and a central pipe for connection to B and C, respectively.
外管Aの下部注入部ボデイ3及び上部注入部ボ
デイ5には、周方向に所定間隔で長穴からなる複
数の吐出口16,17がそれぞれ設けられてい
る。また、上部注入部ボデイ5の吐出口17の周
辺における内周部には、バルブ管7a,7b及び
その密封部9a,9bによつて囲まれた薬液の混
合室18が設けられている。 The lower injection part body 3 and the upper injection part body 5 of the outer tube A are respectively provided with a plurality of discharge ports 16 and 17 made of elongated holes at predetermined intervals in the circumferential direction. Further, a mixing chamber 18 for a chemical solution is provided in the inner circumference of the upper injection part body 5 around the discharge port 17, and is surrounded by the valve pipes 7a, 7b and their sealing parts 9a, 9b.
内管Bのバルブ管7a,7bの重なり部分に
は、後部バルブ管7bを周囲に複数穿設した連通
孔19を介して外流路14に連通する迂回路20
が設けられ、この迂回路20は後部バルブ管7b
の周囲に複数穿設した弁孔21を介して混合室1
8に連通されている。 In the overlapping portion of the valve pipes 7a and 7b of the inner pipe B, there is a detour 20 that communicates with the outer flow path 14 through a plurality of communication holes 19 formed around the rear valve pipe 7b.
is provided, and this detour 20 is connected to the rear valve pipe 7b.
The mixing chamber 1 is connected to the mixing chamber 1 through multiple valve holes 21 bored around the
It is connected to 8.
また、前部バルブ管7aの周囲には、内流路1
5と混合室18を連通させる弁孔22が複数穿設
されている。 Further, an inner flow path 1 is provided around the front valve pipe 7a.
A plurality of valve holes 22 are bored through which the mixing chamber 18 and the mixing chamber 18 communicate with each other.
そして、各弁孔21,22の穿設部の外周には
ゴム等の弾性材からなる環状の弁板23が包着さ
れている。 An annular valve plate 23 made of an elastic material such as rubber is wrapped around the outer periphery of the perforated portion of each valve hole 21, 22.
中心管Cの先端部には、先端が閉鎖した筒状の
バルブプランジヤ24がその内周面を密封管11
及びシール部材12に密接して軸方向に進退自在
に取付けられている。このバルブプランジヤ24
の後端部は、内管Bの前部バルブ管7aの先端部
内に摺動自在に密接して嵌合され、その後部端部
と中心管Cの管体10との間には内流路15に連
通する切換え流路25が設けられ、また前部外周
から前方にかけて外管Aとの間に先端導入部26
が形成されている。 At the tip of the central tube C, a cylindrical valve plunger 24 with a closed tip seals the inner circumferential surface of the tube 11.
and is attached in close contact with the seal member 12 so as to be freely movable forward and backward in the axial direction. This valve plunger 24
The rear end is slidably and tightly fitted into the tip of the front valve pipe 7a of the inner tube B, and an inner flow path is formed between the rear end and the tube body 10 of the central tube C. A switching flow path 25 communicating with the outer tube A is provided, and a tip introduction portion 26 is provided between the outer tube A and the outer tube A from the front outer periphery to the front.
is formed.
バルブプランジヤ24の中間部周囲には、これ
が後退位置にあるとき切換え流路25と先端導入
路26に開口して両者を連通し、かつ前進位置に
あるときはシール部材12によつて閉鎖される複
数の弁孔27が設けられている。また、バルブプ
ランジヤ24はその後退位置において内管Bの弁
孔22を閉鎖し、前進位置にあるときは弁孔22
を開放して内流路15と混合室18を連通させる
ように構成されている。 Around the middle part of the valve plunger 24, when it is in the retracted position, it opens into the switching passage 25 and the tip introduction passage 26 to communicate with each other, and when it is in the forward position, it is closed by the sealing member 12. A plurality of valve holes 27 are provided. Further, the valve plunger 24 closes the valve hole 22 of the inner pipe B in its retracted position, and closes the valve hole 22 in its forward position.
It is configured to open the inner flow path 15 and the mixing chamber 18 to communicate with each other.
更に、バルブプランジヤ24の先端にはピスト
ン状のOリング付きヘツド24′が突設され、こ
のヘツド24′はその前方に設けたシリンダ28
内に進退自在に密接して挿嵌されている。 Furthermore, a piston-shaped head 24' with an O-ring is provided protruding from the tip of the valve plunger 24, and this head 24' is connected to a cylinder 28 provided in front of the head 24'.
It is closely inserted into the interior so that it can move forward and backward.
シリンダ28は、その周囲に複数の流路29を
形成して外管Aの流路ボデイ4の中心部に固定さ
れており、その先端部には軸受30が取付けられ
ている。 The cylinder 28 forms a plurality of passages 29 around it and is fixed to the center of the passage body 4 of the outer tube A, and a bearing 30 is attached to the tip thereof.
そして、この軸受30とヘツド24′との間に
は圧縮コイルバネ等の戻しバネ31が装着され、
ヘツド24を介してバルブプランジヤ24に対し
てその後退方向へ弾圧力を付与している。 A return spring 31 such as a compression coil spring is installed between the bearing 30 and the head 24'.
A resilient force is applied to the valve plunger 24 through the head 24 in the backward direction.
軸受30の中心孔30′にはロケツト型のプラ
グバルブ32が挿嵌され、その後端は軸受30か
ら突出して後退位置にあるプランジヤヘツド24
の先端に近接して保持されている。 A rocket-shaped plug valve 32 is inserted into the center hole 30' of the bearing 30, and the rear end thereof protrudes from the bearing 30 and has a plunger head 24 in a retracted position.
is held close to the tip of the
このプラグバルブ32は、その中間部周囲に形
成した凹溝33に軸受30の中心孔30′内周に
装着したOリング34が係合して所定位置に仮止
め保持されており、この状態でバルブプランジヤ
24がOリング34の拘束力以上と圧力で前進す
るとき、そのヘツド24′に押圧されてOリング
34を圧潰又は内周部を切断して前方に突出する
ように構成されている。 This plug valve 32 is temporarily held in a predetermined position by engaging an O-ring 34 attached to the inner periphery of the center hole 30' of the bearing 30 in a groove 33 formed around the middle portion of the plug valve 32. When the valve plunger 24 moves forward with a pressure greater than the restraining force of the O-ring 34, it is pressed by its head 24' to crush the O-ring 34 or cut its inner peripheral portion and protrude forward.
従つて、シリンダ28の内部はその後端をOリ
ング付きプランジヤヘツド24′で、かつ先端は
軸受30及びプラグバルブ32でそれぞれ常時密
封されて内部に薬液等が進入しないようになつて
おり、この結果内部の戻しバネ31は薬液等で固
結されることなく常にその弾圧力を発揮してバル
ブプランジヤ24を正常に後退させることができ
る。 Therefore, the inside of the cylinder 28 is always sealed by a plunger head 24' with an O-ring at the rear end, and by a bearing 30 and a plug valve 32 at the tip to prevent chemicals from entering the inside. The internal return spring 31 can always exert its elastic force without being solidified by a chemical solution or the like to normally retreat the valve plunger 24.
プラグバルブ32の前方には、下部注入部ボデ
イ3内に前後に摺動可能に嵌合したピストンバル
ブ35が仮止め保持されている。 In front of the plug valve 32, a piston valve 35 fitted into the lower injection part body 3 so as to be slidable back and forth is temporarily held.
このピストンバルブ35は、その外周面で下部
吐出口16を閉鎖する後退位置において所定剪断
力で切断可能なシヤーピン36により下部注入部
ボデイ3に係止されており、その中心部には先端
部がラツパ状に拡開した流路37が設けられてい
る。 This piston valve 35 is locked to the lower injection part body 3 by a shear pin 36 which can be cut with a predetermined shearing force in a retracted position that closes the lower discharge port 16 on its outer circumferential surface, and has a tip at its center. A channel 37 is provided which expands into a trumpet shape.
そしてこの流路37は、プラグバルブ32が軸
受30に仮止めされた状態においては流体が自由
に流通できるように開放されており、またプラグ
バルブ32が前進するときにはその先端部が密に
嵌合して閉鎖されるようになつている。 This flow path 37 is open so that fluid can freely flow when the plug valve 32 is temporarily fixed to the bearing 30, and when the plug valve 32 moves forward, its tip is tightly fitted. It's starting to close down.
逆止弁ボデイ2の内部には、弁体38の弁孔3
9をバネ40に弾圧されたボール41により閉鎖
した逆止弁42が設置されている。 Inside the check valve body 2, there is a valve hole 3 of a valve body 38.
A check valve 42 is installed in which the valve 9 is closed by a ball 41 pressed by a spring 40.
「発明の作用」
以上のように構成されたグラウトモニターを使
用して複合注入施工を行う際には、外管A、内管
B、中心管Cにそれぞれ接続用の外管、内管及び
中心管を連結すると共に、三重管スイベルを上端
に装着して注入管を構成する。"Action of the Invention" When performing composite injection work using the grout monitor configured as described above, the outer pipe A, inner pipe B, and center pipe C are connected to the outer pipe, inner pipe, and center pipe, respectively. Connect the tubes and attach a triple tube swivel to the upper end to form an injection tube.
そして先ず、第1,2図に示すように内流路1
5に堀削水を圧送しながら注入管を回転して先端
のドリルビツト1で削孔し、順次所要数の接続管
を連結しながら所定深度に達するまで掘進する。 First, as shown in FIGS. 1 and 2, the inner flow path 1
5, while pumping drilling water under pressure, the injection pipe is rotated to drill a hole with the drill bit 1 at the tip, and the drilling is continued until a predetermined depth is reached while sequentially connecting the required number of connecting pipes.
この場合において、外流路14及び中心管C内
には何らの流体も圧送しないため、掘削水は内流
路15から後退位置にあるバルブプランジヤ24
内の切換え流路25及び弁孔27を通つて先端導
入路26に流入し、更にシリンダ28の外周の流
路29及び開放状態にあるピストンバルブ35の
中心流路37を通つて逆止弁42に至り、このボ
ール40を後退させながら弁孔39を通つてドリ
ルビツト1の先端から吐出する。 In this case, since no fluid is forced into the outer flow path 14 and the center pipe C, the drilling water flows from the inner flow path 15 to the valve plunger 24 in the retracted position.
It flows into the tip introduction path 26 through the switching flow path 25 and valve hole 27 inside the cylinder 28, and further flows through the flow path 29 on the outer periphery of the cylinder 28 and the center flow path 37 of the piston valve 35 in the open state to the check valve 42. The ball 40 is then discharged from the tip of the drill bit 1 through the valve hole 39 while being retracted.
このようにして所定深度まで掘進した後、順次
注入管を引揚げながら注入を行う。この注入に際
しては、第3図に示すように先ず中心管C内に薬
液以外の水又は空気等の非硬化性圧力流体を圧送
し、先端のバルブプランジヤ24を加圧して下降
させ、ヘツド24′によりプラグバルブ32を押
圧して前方に突出させ、その先端部をピストンバ
ルブ35の中心流路37に密に挿嵌し、これによ
つてドリルビツト1への先端流路を閉鎖する。 After excavating to a predetermined depth in this manner, injection is carried out while sequentially pulling up the injection pipe. For this injection, as shown in FIG. 3, first, a non-hardening pressure fluid such as water or air other than the chemical solution is fed into the central tube C, and the valve plunger 24 at the tip is pressurized and lowered to the head 24'. The plug valve 32 is pressed to protrude forward, and its tip is tightly fitted into the center passage 37 of the piston valve 35, thereby closing the tip passage to the drill bit 1.
次いで、中心管Cの圧力流体によりバルブプラ
ンジヤ24を加圧した状態において、外流路14
にセメント懸濁液等の瞬結硬化剤(B液)を圧送
すると共に、内流路15に緩結薬液(A液)を圧
送する。 Next, with the valve plunger 24 pressurized by the pressure fluid in the central pipe C, the outer flow path 14
An instant hardening agent (liquid B) such as a cement suspension is pumped into the inner channel 15, and a slow-setting chemical liquid (liquid A) is pumped into the inner channel 15.
外流路14内を流下したB液は連通孔19から
迂回路20内に流入し、弁孔21から弁板23を
押しのけて混合室18内に流入する。 The B liquid that has flowed down in the outer flow path 14 flows into the detour path 20 through the communication hole 19, and flows into the mixing chamber 18 through the valve hole 21, pushing aside the valve plate 23.
一方、内流路15を流下したA液は、バルブプ
ランジヤ24′の前進により開口している弁孔2
2から弁板23を押しのけて混合室18内に流入
し、外流路14からのB液と合流混合して上部吐
出口17から吐出噴射し、その周辺地盤と注入管
周辺の隙間に注入されて短時間に硬化してパツカ
ーを構成する。 On the other hand, the A liquid flowing down the inner flow path 15 is transferred to the valve hole 2 which is opened by the advancement of the valve plunger 24'.
2, the liquid flows into the mixing chamber 18 by pushing aside the valve plate 23, mixes with the B liquid from the outer flow path 14, is discharged from the upper discharge port 17, and is injected into the gap between the surrounding ground and the injection pipe. It hardens in a short time and forms a patch car.
このようにして瞬結注入工程が終了後、中心管
C内への圧力流体の圧送を停止し、これによつて
バルブプランジヤ24の加圧を解除すると、第4
図に示すように戻しバネ31の弾圧力によりバル
ブプランジヤ24は自動的に後退し、その後端部
で混合室18の弁孔22を閉鎖すると共に、弁孔
27を開放して切換え流路25と先端導入路26
を連通させる。 After the instantaneous injection process is completed in this manner, the feeding of the pressure fluid into the central pipe C is stopped, and the pressurization of the valve plunger 24 is thereby released.
As shown in the figure, the valve plunger 24 automatically retreats due to the elastic force of the return spring 31, closes the valve hole 22 of the mixing chamber 18 at its rear end, and opens the valve hole 27 to connect the switching flow path 25. Tip introduction channel 26
communicate.
これによつて内流路15に引続き圧送されてい
るB液は、直ちに切換え流路25、弁孔27を通
つて先端導入路26に流入し、更に流路29から
ピストンバルブ35の前方に流入し、ピストンバ
ルブ35を加圧してシヤーピン36を切断し、ピ
ストンバルブ35を前進下降させる。 As a result, the B liquid that is continuously being force-fed into the inner flow path 15 immediately flows into the tip introduction path 26 through the switching flow path 25 and the valve hole 27, and further flows into the front of the piston valve 35 from the flow path 29. Then, the piston valve 35 is pressurized to disconnect the shear pin 36, and the piston valve 35 is moved forward and downward.
このピストンバルブ35の下降によつて下部吐
出口16が開放されるため、A液は吐出口16か
ら吐出噴射して周辺地盤中に注入される。この場
合、先の瞬結注入によるパツカー効果でA液の上
昇逸出が防止され、A液による確実な浸透注入を
行うことが可能となる。 Since the lower discharge port 16 is opened by the lowering of the piston valve 35, the A liquid is ejected from the discharge port 16 and injected into the surrounding ground. In this case, the packer effect caused by the previous instantaneous setting injection prevents liquid A from rising and escaping, making it possible to perform reliable penetration injection with liquid A.
なお、シリンダ28の周囲にA液が満たされて
も、シリンダ28の後端部はプランジヤヘツド2
4′で、かつ先端は軸受30及びプラグバルブ3
2でそれぞれ密封されているため、内部にA液が
侵入することはなく、戻しバネ31は恒久的にそ
の機能を発揮することができる。 Note that even if the area around the cylinder 28 is filled with liquid A, the rear end of the cylinder 28 is not connected to the plunger head 2.
4', and the tip is the bearing 30 and the plug valve 3
2, so that liquid A does not enter inside, and the return spring 31 can permanently perform its function.
このようにして1ステツプの瞬結及び緩結注入
工程が終了後、順次注入管を引揚げながら同様に
次段のステツプの注入を行う。 After one step of instant setting and slow setting injection process is completed in this manner, the next step of injection is carried out in the same manner while sequentially pulling up the injection tube.
「発明の効果」
以上の通りこの発明によれば、注入管の中心部
に非硬化性圧力流体を圧送する先端が開口した中
心管を設置し、中心管の先端部の外周に先端部が
閉鎖された筒状のプランジヤを進退自在かつ密封
状に取付けると共に、このプランジヤに後退方向
に弾圧力を付与する戻しバネを装着し、プランジ
ヤの進退作動により中心管周囲に設けた薬液流路
の弁孔を開閉するようにしてなるので、弁孔の開
閉を薬液の圧送及び停止操作に無関係に行うこと
ができ、薬液の注入圧をバネなどに制限されるこ
となく自由に設定することができると共に、弁孔
の開閉作動も確実で薬液の円滑な圧送が可能とな
り、しかも薬液による戻しバネの固結を防止する
ことができ、かつ薬液の切換え注入時に薬液の圧
送を中断することなく安定的に連続した注入施工
が可能となる。"Effects of the Invention" As described above, according to the present invention, a central tube with an open tip for pumping non-hardening pressure fluid is installed in the center of the injection tube, and the tip is closed on the outer periphery of the tip of the central tube. A cylindrical plunger is installed in a sealed manner so that it can move forward and backward, and a return spring that applies elastic force in the backward direction is attached to the plunger, and the valve hole of the chemical liquid flow path provided around the central pipe is attached by moving the plunger forward and backward. Since it is configured to open and close, the valve hole can be opened and closed regardless of the pressure feeding and stopping operations of the chemical solution, and the injection pressure of the chemical solution can be freely set without being restricted by a spring or the like. The opening/closing operation of the valve hole is reliable, allowing for smooth pressure feeding of the chemical solution, and also preventing the return spring from solidifying due to the chemical solution, and ensuring stable and continuous pressure feeding of the chemical solution without interruption when switching and injecting the chemical solution. This makes it possible to carry out injection construction.
第1図はこの発明の注入装置の後端部の構成を
示す縦断側面図、第2図は同先端部の構成を示す
縦断側面図、第3図は瞬結注入時におけるこの発
明の注入装置の要部の縦断側面図、第4図は緩結
注入時におけるこの発明の注入装置の要部の縦断
側面図である。
A……外管、B……内管、C……中心管、1…
…ドリルビツト、2……逆止弁ボデイ、3……下
部注入部ボデイ、4……流路ボデイ、5……上部
注入部ボデイ、6……継手部材、7a,7b……
バルブ管、8……継手部材、9a,9b……バル
ブ管密封部、10……管体、11……密封管、1
2……シール部材、13′……継手部材、13…
…突部、14……外流路、15……内流路、16
……下部吐出口、17……上部吐出口、18……
混合室、19……連通孔、20……迂回路、21
……弁孔(上部)、22……弁孔(下部)、23…
…弁板、24……バルブプランジヤ、24′……
ヘツド、25……切換え流路、26……先端導入
路、27……弁孔、28……シリンダ、29……
流路、30……軸受、30′……中心孔、31…
…戻しバネ、32……プラグバルブ、33……凹
溝、34……Oリング、35……ピストンバル
ブ、36……シヤーピン、37……流路、38…
…弁体、39……弁孔、40……ボール、41…
…バネ、42……逆止弁。
FIG. 1 is a longitudinal side view showing the structure of the rear end of the injection device of the present invention, FIG. 2 is a longitudinal side view showing the structure of the tip thereof, and FIG. 3 is the injection device of the invention during instantaneous injection. FIG. 4 is a vertical side view of the main part of the injection device of the present invention during loose injection. A...Outer tube, B...Inner tube, C...Center tube, 1...
...Drill bit, 2...Check valve body, 3...Lower injection part body, 4...Flow path body, 5...Upper injection part body, 6...Joint member, 7a, 7b...
Valve pipe, 8...Joint member, 9a, 9b...Valve pipe sealed portion, 10...Pipe body, 11...Sealed tube, 1
2... Seal member, 13'... Joint member, 13...
...Protrusion, 14...Outer flow path, 15...Inner flow path, 16
...Lower outlet, 17...Upper outlet, 18...
Mixing chamber, 19...Communication hole, 20...Detour, 21
... Valve hole (upper), 22 ... Valve hole (lower), 23...
...Valve plate, 24...Valve plunger, 24'...
Head, 25...Switching channel, 26...Tip introduction path, 27...Valve hole, 28...Cylinder, 29...
Channel, 30... Bearing, 30'... Center hole, 31...
... Return spring, 32 ... Plug valve, 33 ... Concave groove, 34 ... O ring, 35 ... Piston valve, 36 ... Shear pin, 37 ... Channel, 38 ...
...Valve body, 39...Valve hole, 40...Ball, 41...
...Spring, 42...Check valve.
Claims (1)
る先端が開口した中心管を設置し、前記中心管の
先端部の外周に先端部が閉鎖された筒状のバルブ
プランジヤを進退自在かつ密封状に取付けると共
に、前記バルブプランジヤの進退作動により前記
中心管周囲に設けた薬液流路の弁孔を開閉するよ
う構成され、前記バルブプランジヤの先端部はそ
の前部に設けたシリンダ内に進退自在かつ密封状
に挿嵌され、前記シリンダにはその先端部に軸受
を設け、この軸受の中心孔にプラグが前記バルブ
プランジヤの前進力で前方に突出可能に保持さ
れ、前記バルブプランジヤ先端と軸受との間の前
記シリンダ内に前記バルブプランジヤの先端部に
後退方向に弾圧力を付与する戻しバネを装着して
なることを特徴とする薬液注入装置。 2 シリンダの前方には、所定押圧力により前進
可能に外管内に保持され、その前進時に外管に設
けた注入口を開放するピストンバルブを設け、こ
のピストンバルブにはプラグの前進時にその先端
部が挿嵌して閉鎖される掘削水流路を中心に設け
てなることを特徴とする特許請求の範囲第1項記
載の薬液注入装置。 3 薬液流路は、中心管とその周囲に設けた内管
との間に形成した内流路と、前記内管と外管との
間に形成した外流路、及びバルブプランジヤ前半
部外周からピストンバルブ先端部にかけて外管の
内周部に形成した先端導入路とからなることを特
徴とする特許請求の範囲第2記載の薬液注入装
置。 4 内管先端部の内流路内には、その内周部に摺
動自在にバルブプランジヤの後端部を挿嵌し、こ
のバルブプランジヤの内周面と中心管の外周部間
に前記内流路に連通する切換え導入路を設けてな
ることを特徴とする特許請求の範囲第3項記載の
薬液注入装置。 5 弁孔は、バルブプランジヤの中間部に設け、
このバルブプランジヤが後退位置にあるとき切換
え導入路と先端導入路とを連通するように開放さ
れ、かつバルブプランジヤが前進位置にあるとき
中心管の先端部外周に設けた閉鎖部材によつて閉
鎖されるようにしてなることを特徴とする特許請
求の範囲第4項記載の薬液注入装置。 6 内管の先端部とその周囲の外管との間には外
管に設けた注入口に連通する混合室を設けてなる
ことを特徴とする特許請求の範囲第5項記載の薬
液注入装置。 7 弁孔は、内管の先端部に混合室に連通して設
け、バルブプランジヤが後退位置にあるときその
後端部で閉鎖され、かつバルブプランジヤが前進
位置にあるとき内流路と前記混合室を連通させる
ようにしてなることを特徴とする特許請求の範囲
第6項記載の薬液注入装置。 8 内管には、外流路に連通し、かつ弁孔を介し
て混合室に連通する迂回路を設けてなることを特
徴とする特許請求の範囲第7項記載の薬液注入装
置。[Scope of Claims] 1. A central tube with an open tip for pumping non-hardening pressure fluid is installed in the center of the injection tube, and a cylindrical valve with a closed tip is provided around the outer periphery of the tip of the central tube. The plunger is attached in a sealed manner so as to move forward and backward, and the valve plunger is configured to open and close a valve hole in a chemical fluid flow path provided around the central pipe by forward and backward movement of the valve plunger, and the tip of the valve plunger is installed in the front part thereof. The cylinder is fitted in a sealed manner so as to be freely movable and retractable, and the cylinder is provided with a bearing at its tip, and a plug is held in the center hole of the bearing so as to be able to protrude forward by the forward force of the valve plunger. A chemical liquid injector characterized in that a return spring is installed in the cylinder between the valve plunger tip and the bearing to apply an elastic force to the tip of the valve plunger in a backward direction. 2. A piston valve is provided at the front of the cylinder, which is held in the outer tube so as to be able to move forward with a predetermined pressing force, and opens the injection port provided in the outer tube when the piston valve moves forward. 2. The chemical liquid injection device according to claim 1, characterized in that the chemical liquid injection device is provided at the center with an excavation water channel that is inserted and closed. 3. The chemical liquid flow path includes an inner flow path formed between the center tube and an inner tube provided around it, an outer flow path formed between the inner tube and the outer tube, and a flow path from the outer periphery of the front half of the valve plunger to the piston. 2. The chemical liquid injector according to claim 2, further comprising a tip introduction path formed on the inner periphery of the outer tube toward the tip of the valve. 4 The rear end of the valve plunger is slidably inserted into the inner periphery of the inner flow path of the tip of the inner tube, and the inner periphery is inserted between the inner periphery of the valve plunger and the outer periphery of the center tube. 4. The chemical liquid injection device according to claim 3, further comprising a switching introduction path communicating with the flow path. 5 The valve hole is provided in the middle part of the valve plunger,
When the valve plunger is in the retracted position, it is opened so that the switching introduction passage and the tip introduction passage communicate with each other, and when the valve plunger is in the forward position, it is closed by a closing member provided on the outer periphery of the tip of the central tube. 5. A liquid drug injection device according to claim 4, characterized in that: 6. The liquid drug injection device according to claim 5, characterized in that a mixing chamber communicating with an injection port provided in the outer tube is provided between the tip of the inner tube and the outer tube surrounding the tip. . 7. A valve hole is provided at the distal end of the inner pipe to communicate with the mixing chamber, and is closed at the rear end when the valve plunger is in the retracted position, and is closed between the inner flow path and the mixing chamber when the valve plunger is in the forward position. 7. The drug solution injector according to claim 6, wherein the drug solution injector is configured to communicate with the drug solution injector. 8. The chemical liquid injector according to claim 7, wherein the inner tube is provided with a detour that communicates with the outer flow path and communicates with the mixing chamber via a valve hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13636284A JPS6117628A (en) | 1984-06-30 | 1984-06-30 | Chemical grout injector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13636284A JPS6117628A (en) | 1984-06-30 | 1984-06-30 | Chemical grout injector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6117628A JPS6117628A (en) | 1986-01-25 |
JPH0328526B2 true JPH0328526B2 (en) | 1991-04-19 |
Family
ID=15173394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13636284A Granted JPS6117628A (en) | 1984-06-30 | 1984-06-30 | Chemical grout injector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6117628A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63255418A (en) * | 1987-04-10 | 1988-10-21 | Shohei Senda | Valve switch for chemical grout injector |
JPH0641946A (en) * | 1992-03-04 | 1994-02-15 | Nit Co Ltd | Ground hardener injecting device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5821042B2 (en) * | 1975-08-28 | 1983-04-27 | コバヤシ フミアキ | Setsuganyobohouhouhou |
JPS58106013A (en) * | 1981-12-16 | 1983-06-24 | Nippon Soiru Kogyo Kk | Method and apparatus for grout injection work |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6040677Y2 (en) * | 1981-08-04 | 1985-12-09 | 株式会社地巧社 | Grout monitor in injection pipe |
-
1984
- 1984-06-30 JP JP13636284A patent/JPS6117628A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5821042B2 (en) * | 1975-08-28 | 1983-04-27 | コバヤシ フミアキ | Setsuganyobohouhouhou |
JPS58106013A (en) * | 1981-12-16 | 1983-06-24 | Nippon Soiru Kogyo Kk | Method and apparatus for grout injection work |
Also Published As
Publication number | Publication date |
---|---|
JPS6117628A (en) | 1986-01-25 |
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