JP4162046B2

JP4162046B2 - Closing device and joint and ground improvement method

Info

Publication number: JP4162046B2
Application number: JP2005191112A
Authority: JP
Inventors: 史郎水越
Original assignee: Nishimatsu Construction Co Ltd
Current assignee: Nishimatsu Construction Co Ltd
Priority date: 2005-06-30
Filing date: 2005-06-30
Publication date: 2008-10-08
Anticipated expiration: 2025-06-30
Also published as: JP2007010025A

Description

本発明は、管内に注入した注入材が逆流するのを防止するための閉鎖装置および該閉鎖装置を備える継ぎ手、さらには、該継ぎ手を用いて地盤改良する方法に関する。 The present invention relates to a closing device for preventing backflow of an injection material injected into a pipe, a joint including the closing device, and a method for ground improvement using the joint.

山岳トンネルを構築する場合、切羽から前方地山内に鋼管を打ち込み、注入材を圧入することによって地山の補強のための改良体を構築し、トンネル掘削に先立って地山を先行補強する長尺鋼管フォアパイリング（ＡＧＦ）および注入式フォアポーリングによる工事が行われている。この工事は、掘削に伴う変位を防止し、切羽および天端を防護するために実施されるものである。具体的には、まず、ドリルジャンボなどの削孔機を用いて、削孔と、注入管となる鋼管の挿入とが同時に行われる。次に、鋼管に設けられた孔を通して鋼管周囲の地盤に注入材が噴射される。これにより、地盤に噴射された注入材が土粒子間に浸透し、固結して、その鋼管を含んだ略円筒状の改良体が構築される。なお、注入材には、セメントミルク、メチレンジフェニルイソシアネート（ＭＤＩ）などのウレタン系注入材、水ガラス系注入材が使用される。この工事では、改良体が、トンネル周方向に所定間隔で構築される。 When constructing a mountain tunnel, a steel pipe is driven into the front ground from the face, and an improved body for reinforcing the ground is built by injecting an injection material. Construction by steel pipe fore-pilling (AGF) and injection type fore-poling is being carried out. This construction is carried out in order to prevent displacement caused by excavation and to protect the face and the top. Specifically, first, using a drilling machine such as a drill jumbo, drilling and insertion of a steel pipe to be an injection pipe are performed simultaneously. Next, an injection material is injected into the ground around the steel pipe through a hole provided in the steel pipe. Thereby, the injection material injected into the ground permeates and solidifies between the soil particles, and a substantially cylindrical improvement body including the steel pipe is constructed. As the injection material, cement type milk, urethane type injection material such as methylene diphenyl isocyanate (MDI), and water glass type injection material are used. In this construction, improved bodies are constructed at predetermined intervals in the circumferential direction of the tunnel.

軟弱地盤に構造物を構築する場合、構造物の基礎を構築する前に、地盤強度を高めるための地盤改良工事が行われている。この地盤改良工事も、上記と同様、地盤に鋼管を挿入し、注入材を圧入し、改良体を構築することにより行うことができる。 In the case of constructing a structure on soft ground, before the foundation of the structure is constructed, ground improvement work is performed to increase the ground strength. Similarly to the above, this ground improvement work can be performed by inserting a steel pipe into the ground, press-fitting an injection material, and constructing an improved body.

これらの工事では、鋼管の周囲に均一に、かつ広範囲に浸透させ、円筒に近く、径の大きい良好な改良体を構築するために、ポンプなどの供給手段を使用して注入材を圧入している。したがって、鋼管を閉止することなく、供給手段による供給を停止した場合、孔を通して鋼管内に流入し、鋼管を通して注入材が逆流する。この注入材の逆流は、地盤に注入した注入材の圧力低下をもたらし、この結果、径が小さい改良体しか構築することができず、所定強度の地盤が得られないといった問題を生じさせる。このため、鋼管と供給手段とを接続する継ぎ手には、注入材の逆流を防止するための閉鎖手段を備える継ぎ手が用いられている。 In these constructions, in order to infiltrate uniformly and extensively around the steel pipe, and to construct a good improved body that is close to a cylinder and large in diameter, the injection material is press-fitted using a supply means such as a pump. Yes. Therefore, when the supply by the supply means is stopped without closing the steel pipe, it flows into the steel pipe through the hole, and the injected material flows backward through the steel pipe. This backflow of the injected material causes a pressure drop of the injected material injected into the ground, and as a result, only an improved body having a small diameter can be constructed, and a problem arises in that a ground having a predetermined strength cannot be obtained. For this reason, a joint provided with a closing means for preventing a backflow of the injected material is used as a joint for connecting the steel pipe and the supply means.

ガスおよび液輸送用の管路に使用され、最適なガス密性および液密性が得られる継ぎ手として、ボールバルブを備えるカムロック継ぎ手が提案されている（例えば、特許文献１および特許文献２参照）。カムロックは、図１０に示すように、側面にカム溝９１を備えるアダプタ９０と、そのアダプタ９０を収容するアダプタ収容部１０１とカム溝９１に係合し、回動することにより連結力を増大させるカム１０２とそのカム１０２に連続する腕部１０３とアダプタ収容部１０１内に収容され、連結力の増大に伴ってアダプタ９０により圧縮されるリング状の弾性部材１０４とを備えるカプラー１００とから構成される。カムロック継ぎ手は、一端が、雄ねじ部または雌ねじ部とされ、他端が、カム溝を備えるアダプタとされている。したがって、２つの管のうちの一方の管が、ねじ切りされていて、他方の管が、カプラーが連結されているものを連結することができる。これら２つの管を連結する場合、一方の管にカムロック継ぎ手を連結し、カプラー収容部に、アダプタを挿入し、カプラーの腕部によってカムをカム溝に係合させ、カムを回動させ、アダプタを弾性部材に押し当てた状態にすることにより、連結され、内部が封止される。このカムロック継ぎ手は、雄ねじ部または雌ねじ部と、アダプタとの間に、さらに、弁箱と、流路を備えるボールと、ボールに連続し、ボールを回転させるためのレバーとを備えるボールバルブを含んで構成されており、レバーによってボールを回転させることにより流路を閉鎖することができる。なお、ボールバルブは、閉鎖した際、ガスおよび液の漏れが著しく少ないことから、漏れ防止や、高い精度での流量制御が必要となる場合に使用されている。 Cam lock joints having ball valves have been proposed as joints that are used in gas and liquid transport pipes and provide optimum gas tightness and liquid tightness (see, for example, Patent Document 1 and Patent Document 2). . As shown in FIG. 10, the cam lock engages with an adapter 90 having a cam groove 91 on the side surface, an adapter housing portion 101 for housing the adapter 90, and the cam groove 91, and increases the coupling force by rotating. The coupler 102 includes a cam 102, an arm portion 103 continuous with the cam 102, and a ring-shaped elastic member 104 that is accommodated in the adapter accommodating portion 101 and is compressed by the adapter 90 as the coupling force increases. The One end of the cam lock joint is a male screw portion or a female screw portion, and the other end is an adapter having a cam groove. Thus, one of the two tubes can be threaded and the other tube can be connected to the coupler. When these two pipes are connected, a cam lock joint is connected to one pipe, an adapter is inserted into the coupler housing, the cam is engaged with the cam groove by the arm of the coupler, and the cam is rotated. By being pressed against the elastic member, they are connected and the inside is sealed. The cam lock joint includes a ball valve including a valve box, a ball having a flow path, and a lever that is continuous with the ball and rotates the ball, between the male screw portion or the female screw portion and the adapter. The flow path can be closed by rotating the ball with a lever. The ball valve is used when it is necessary to prevent leakage and to control the flow rate with high accuracy because the leakage of gas and liquid is extremely small when closed.

地盤改良工事においては、鋼管にこのボールバルブを備えるカムロック継ぎ手を接続し、供給手段に接続される管にカプラーを接続して使用される。これにより、供給手段による注入材の供給を停止した場合にボールバルブで流路を閉鎖することで、供給手段への逆流を防止することができる。また、ボールバルブで流路を閉鎖することで、カムロック継ぎ手からカプラーが接続された管を取りはずすことができる。 In ground improvement work, a cam lock joint equipped with this ball valve is connected to a steel pipe, and a coupler is connected to a pipe connected to the supply means. Thereby, when the supply of the injection material by the supply means is stopped, the back flow to the supply means can be prevented by closing the flow path with the ball valve. Moreover, the pipe | tube with which the coupler was connected can be removed from a cam lock joint by closing a flow path with a ball valve.

地盤改良工事において、ボールバルブを使用する回数は、注入材の逆流を防止するために流路を閉鎖する１回のみであり、単に１回閉止するのみで、高価なボールバルブを採用するにはコストがかかるといった問題があった。また、ボールバルブに代えて、スライド可能な閉鎖板で閉鎖することもできるが、閉鎖板とその閉鎖板を収容する弁箱との間に隙間を生じるため、その隙間から漏出し、地盤に注入材を適切に圧入することはできず、また、圧入できたとしても、その隙間から漏出するといった問題があった。
特開２００３−１４８６４１号公報特開２００４−７５１９８号公報 In ground improvement work, the ball valve is used only once to close the flow path in order to prevent the backflow of the injected material. There was a problem of cost. In addition, it can be closed with a slidable closing plate instead of the ball valve, but a gap is created between the closing plate and the valve box that houses the closing plate. There was a problem that the material could not be press-fitted properly, and even if it could be press-fitted, it would leak out from the gap.
Japanese Patent Laid-Open No. 2003-148641 JP 2004-75198 A

本発明は、上記問題に鑑み、注入材を適切に圧入することができ、注入材の逆流を防止することができ、外部への漏れを防止することを可能にする閉鎖装置および該閉鎖装置を備える継ぎ手を提供することを目的とする。 In view of the above problems, the present invention provides a closing device that can appropriately press-fit an injection material, can prevent backflow of the injection material, and can prevent leakage to the outside. An object is to provide a prepared joint.

上記課題は、本発明の管の閉鎖装置および該閉鎖装置を備える継ぎ手を提供することにより解決される。すなわち、本発明の請求項１の発明は、管または継ぎ手の側面に形成された開口に連続して延びる挿通穴を有する突出部を備え、前記管または継ぎ手に周設される閉鎖板収容部と、
前記挿通穴および前記開口を通して前記管内または継ぎ手内に挿入され、該管内または継ぎ手内を閉鎖する閉鎖板とを含み、
前記閉鎖板の厚さが、該閉鎖板の挿入方向に向けて小さくされ、打ち込むことにより前記管内または継ぎ手内に挿入されることを特徴とする、閉鎖装置が提供される。 The above problems are solved by providing a tube closure device and a joint comprising the closure device of the present invention. That is, the invention according to claim 1 of the present invention includes a closing plate housing portion provided with a protruding portion having an insertion hole continuously extending in an opening formed on a side surface of a pipe or a joint, and provided around the pipe or the joint. ,
A closing plate inserted into the pipe or the joint through the insertion hole and the opening, and closing the inside of the pipe or the joint;
A closing device is provided, characterized in that the thickness of the closing plate is reduced in the insertion direction of the closing plate and is inserted into the pipe or the joint by driving.

本発明の請求項２の発明によれば、前記挿通穴が、前記閉鎖板の挿入方向に縮小していることを特徴とする閉鎖装置が提供される。 According to invention of Claim 2 of this invention, the said insertion hole is reducing in the insertion direction of the said closure board, The closure apparatus characterized by the above-mentioned is provided.

本発明の請求項３の発明によれば、前記閉鎖板収容部は、前記管内または継ぎ手内に挿入された前記閉鎖板が抜脱しないように掛止する掛止部を備える閉鎖装置が提供される。 According to a third aspect of the present invention, there is provided a closing device, wherein the closing plate housing portion includes a latching portion that latches so that the closing plate inserted into the pipe or the joint is not pulled out. The

本発明の請求項４の発明によれば、前記閉鎖装置は、前記管内または継ぎ手内に挿入された前記閉鎖板の前記突出部から突出する頭部と前記閉鎖板収容部とに嵌合する頭部嵌合溝と該頭部嵌合溝に対向する閉鎖板収容部嵌合溝とを備え、前記閉鎖板が挿入された前記閉鎖板収容部を収納することにより前記閉鎖板の抜脱を抑止する収納部材をさらに含む、閉鎖装置が提供される。 According to a fourth aspect of the present invention, the closing device includes a head that protrudes from the protruding portion of the closing plate inserted into the pipe or the joint and a head that fits into the closing plate receiving portion. A fitting plate and a closing plate housing portion fitting groove facing the head fitting groove, and the removal of the closing plate is suppressed by housing the closing plate housing portion into which the closing plate is inserted. There is provided a closure device further comprising a storage member.

本発明の請求項５の発明によれば、前記閉鎖装置は、アルミニウムから製造されることを特徴とする閉鎖装置が提供される。 According to invention of Claim 5 of this invention, the said closing device is manufactured from aluminum, The closing device characterized by the above-mentioned is provided.

本発明の請求項６の発明によれば、第１の管と第２の管とを連結するとともに、第２の管から第１の管へ供給された注入材が逆流しないように前記第１の管内を閉鎖するために用いられる継ぎ手であって、
側面に開口を備え、前記第１の管と前記第２の管とを連通させる連通部と、
前記連通部の一端に設けられ、前記第１の管に連結するための第１の連結部と、
前記連通部の他端に設けられ、前記第２の管に設けられた連結部に連結可能な第２の連結部と、
前記開口に連続して延びる挿通穴を有する突出部を備え、前記連通部に周設される閉鎖板収容部と、
前記挿通穴および前記開口を通して前記連通部内に挿入され、該連通部内を閉鎖する閉鎖板とを含み、
前記閉鎖板の厚さが、該閉鎖板の挿入方向に向けて小さくされ、打ち込むことにより前記連通部内に挿入されることを特徴とする、継ぎ手が提供される。 According to the invention of claim 6 of the present invention, the first pipe and the second pipe are connected and the first injection material supplied from the second pipe to the first pipe is prevented from flowing backward. A joint used to close the inside of the pipe,
A communication part comprising an opening on a side surface and communicating the first pipe and the second pipe;
A first connecting portion provided at one end of the communication portion and connected to the first pipe;
A second connecting portion provided at the other end of the communication portion and connectable to a connecting portion provided in the second pipe;
A closing plate containing portion provided with a projecting portion having an insertion hole extending continuously to the opening, and provided around the communication portion;
A closing plate inserted into the communication part through the insertion hole and the opening and closing the communication part;
A joint is provided in which the thickness of the closing plate is reduced in the insertion direction of the closing plate, and the closing plate is inserted into the communication portion by driving.

本発明の請求項７の発明によれば、前記挿通穴が、前記閉鎖板の挿入方向に縮小していることを特徴とする継ぎ手が提供される。 According to claim 7 of the present invention, there is provided a joint characterized in that the insertion hole is reduced in the insertion direction of the closing plate.

本発明の請求項８の発明によれば、前記閉鎖板収容部は、前記管内または継ぎ手内に挿入された前記閉鎖板が抜脱しないように掛止する掛止部を備える継ぎ手が提供される。 According to an eighth aspect of the present invention, there is provided a joint provided with a latching portion for latching the closure plate accommodating portion so that the closure plate inserted into the pipe or the joint is not pulled out. .

本発明の請求項９の発明によれば、前記閉鎖装置は、前記管内または継ぎ手内に挿入された前記閉鎖板の前記突出部から突出する頭部と前記閉鎖板収容部とに嵌合する頭部嵌合溝と該頭部嵌合溝に対向する閉鎖板収容部嵌合溝とを備え、前記閉鎖板が挿入された前記閉鎖板収容部を収納することにより前記閉鎖板の抜脱を抑止する収納部材をさらに含む、継ぎ手が提供される。 According to a ninth aspect of the present invention, the closing device includes a head that protrudes from the protruding portion of the closing plate inserted into the pipe or the joint and a head that fits into the closing plate receiving portion. A fitting plate and a closing plate housing portion fitting groove facing the head fitting groove, and the removal of the closing plate is suppressed by housing the closing plate housing portion into which the closing plate is inserted. There is provided a joint further including a storage member.

本発明の請求項１０の発明によれば、前記継ぎ手は、アルミニウムから製造されることを特徴とする継ぎ手が提供される。 According to a tenth aspect of the present invention, there is provided a joint characterized in that the joint is manufactured from aluminum.

本発明の請求項１１の発明によれば、前記第１の連結部および第２の連結部は、雄ねじ、雌ねじ、フランジ、側面にカム溝を備えるアダプタ、前記アダプタを収容するアダプタ収容部と前記カム溝に係合し、回動することにより連結力を増大させるカムと該カムに連続する腕部と該アダプタ収容部内に収容され、前記連結力の増大に伴って前記アダプタにより圧縮される弾性部材とを備えるカプラーから選択される継ぎ手が提供される。 According to an eleventh aspect of the present invention, the first connecting portion and the second connecting portion include a male screw, a female screw, a flange, an adapter having a cam groove on a side surface, an adapter accommodating portion for accommodating the adapter, and the A cam that engages with the cam groove and rotates to increase the connecting force, an arm that is continuous with the cam, and an adapter that is accommodated in the adapter accommodating portion and is compressed by the adapter as the coupling force increases. And a coupling selected from a coupler comprising a member.

本発明では、上記継ぎ手を用いて、安価で地盤改良することができる方法も提供することができる。すなわち、本発明の請求項１２の発明によれば、地盤内に注入材を注入して地盤強度を向上させるための地盤改良方法であって、
地盤を掘孔するとともに、注入管を孔内に挿入する工程と、
側面に開口を備える連通部と、前記連通部の一端に設けられる第１の連結部と、前記連通部の他端に設けられる第２の連結部と、前記開口に連続して延びる挿通穴を有する突出部を備え、前記連通部に周設される閉鎖板収容部と、前記挿通穴および前記開口を通して前記連通部内に挿入され、該連通部内を閉鎖する閉鎖板とを含み、前記閉鎖板の厚さが、該閉鎖板の挿入方向に向けて小さくされる継ぎ手の前記第１の連結部により、注入管に連結し、前記第２の連結部により、前記注入材が充填された容器に接続される注入材供給手段に連結し、前記閉鎖板を前記挿通穴に挿入して該閉鎖板により前記挿通穴を閉鎖しつつ、前記連通部内を閉鎖しないように前記閉鎖板を前記突出部に保持する工程と、
前記供給手段により前記注入材を前記地盤内に圧入する工程と、
前記閉鎖板を打ち込むことにより前記連通部内に該閉鎖板を挿入して、前記連通部内を閉鎖する工程とを含む、地盤改良方法が提供される。 In the present invention, it is also possible to provide a method capable of improving the ground at low cost by using the joint. That is, according to the invention of claim 12 of the present invention, a ground improvement method for improving the ground strength by injecting an injection material into the ground,
Digging the ground and inserting the injection tube into the hole;
A communicating portion having an opening on a side surface; a first connecting portion provided at one end of the communicating portion; a second connecting portion provided at the other end of the communicating portion; and an insertion hole extending continuously to the opening. A closing plate receiving portion provided around the communication portion, and a closing plate inserted into the communication portion through the insertion hole and the opening and closing the communication portion. Connected to the injection pipe by the first connecting portion of the joint whose thickness is reduced in the insertion direction of the closing plate, and connected to the container filled with the injecting material by the second connecting portion. The closing plate is inserted into the insertion hole and the insertion hole is closed by the closing plate, and the closing plate is held by the projecting portion so as not to close the communication portion. And a process of
Pressing the injection material into the ground by the supply means;
And a step of inserting the closing plate into the communication portion by driving the closing plate and closing the inside of the communication portion.

本発明の閉鎖装置および継ぎ手を提供することにより、注入材が逆流するのを防止することができ、漏れも防止することができ、かつ安価で提供することができる。また、ボールバルブ等によって流路を閉鎖する場合、継ぎ手として係合する必要があるが、本発明の閉鎖装置は、管の側面に切り込みを入れ、管に周設することができ、継ぎ手として挿入するスペースがない場所に設けることができる。さらに、本発明の地盤改良方法を提供することにより、地盤改良を、安価で実施することができる。 By providing the closing device and the joint of the present invention, it is possible to prevent the injection material from flowing back, to prevent leakage, and to provide it at low cost. In addition, when closing the flow path with a ball valve or the like, it is necessary to engage as a joint. However, the closing device of the present invention can be cut into the side surface of the pipe and can be provided around the pipe, and inserted as a joint. It can be provided in a place where there is no space to perform. Furthermore, by providing the ground improvement method of the present invention, the ground improvement can be carried out at a low cost.

本発明を、図面を参照して詳細に説明するが、本発明は、図面に示す実施の形態に限定されるものではない。図１は、本発明の閉鎖装置を、管に配設したところを示した図である。本発明の閉鎖装置は、管１０に、カッタなどによって切り込みを入れ、形成された図示しない開口に連続し、管１０の長手方向（矢線Ａに示す方向）に対して垂直に延びる挿通穴１１を有する突出部１２を備え、管１０に周設される閉鎖板収容部１３と、挿通穴１１および開口を通して管１０内に挿入され、管１０内を閉鎖する閉鎖板１４とを含んで構成される。閉鎖装置は、閉鎖板１４の厚さが、その挿入方向に向けて小さくされ、ハンマなどを使用して打ち込むことにより、管１０内に挿入されることを特徴としている。挿通穴１１は、閉鎖板１４の挿入方向に縮小した構造とすることもできるが、閉鎖板１４の厚さが挿入方向に向けて小さくされ、打ち込むことにより挿入されるものであり、閉鎖板１４によって挿通穴１１を閉鎖できることから、特に縮小した構造でなくてもよい。 The present invention will be described in detail with reference to the drawings, but the present invention is not limited to the embodiments shown in the drawings. FIG. 1 is a view showing a closure device of the present invention disposed on a pipe. In the closing device of the present invention, the tube 10 is cut by a cutter or the like, and is continuous with the formed opening (not shown), and extends through the tube 10 in a direction perpendicular to the longitudinal direction (direction indicated by the arrow A). And a closing plate accommodating portion 13 provided around the tube 10 and a closing plate 14 inserted into the tube 10 through the insertion hole 11 and the opening and closing the inside of the tube 10. The The closing device is characterized in that the thickness of the closing plate 14 is reduced in the insertion direction, and the closing plate 14 is inserted into the tube 10 by driving in using a hammer or the like. The insertion hole 11 may be structured to be reduced in the insertion direction of the closing plate 14, but the thickness of the closing plate 14 is reduced in the insertion direction and is inserted by driving. Since the insertion hole 11 can be closed by this, the structure does not have to be particularly reduced.

閉鎖板収容部１３の突出部１２に設けられた挿通穴１１は、閉鎖板１４を挿入した場合に、閉鎖板１４によって閉鎖され、かつ管１０内が閉鎖板１４によって閉鎖されない大きさであることが好ましい。これは、管１０内を流れる流体の流路を確保しつつ、挿通穴１１を通して流体が漏出しないように封止できることを意味する。本発明の閉鎖装置は、閉鎖板１４の厚さが挿入方向に向けて小さくされ、打ち込んで管１０内に挿入する構成とされているため、管１０内に流体を流す場合には、閉鎖板１４を挿通穴１１内に挿入、具体的にはわずかに打ち込んで、管１０内の流路を確保しつつ、閉鎖板１４を突出部１２に固定し、管１０内を閉鎖する場合には、閉鎖板１４を、閉鎖板１４の挿入方向の先端が管１０内の底面に接触するまで打ち込んで、管１０内を閉鎖する。なお、閉鎖板１４によって管１０内を閉鎖した場合、閉鎖板１４の側面に、開口を形成する管１０、挿通穴１１を形成する突出部１２の各面が変形し、それぞれが当接した状態となる。この結果、開口および挿通穴１１を通して漏出するのを防止することができ、また、管１０の内壁に、閉鎖板１４の側面が当接し、流路を閉鎖するため、閉鎖板１４を介して流体が逆流するのを防止することができる。 The insertion hole 11 provided in the projecting portion 12 of the closing plate accommodating portion 13 has a size that is closed by the closing plate 14 and is not closed by the closing plate 14 when the closing plate 14 is inserted. Is preferred. This means that the fluid can be sealed so as not to leak through the insertion hole 11 while securing the flow path of the fluid flowing in the tube 10. In the closing device of the present invention, the thickness of the closing plate 14 is reduced in the insertion direction, and the closing plate 14 is driven and inserted into the tube 10. 14 is inserted into the insertion hole 11, specifically, slightly driven to secure the flow path in the tube 10 while fixing the closing plate 14 to the protruding portion 12 and closing the inside of the tube 10, The closing plate 14 is driven until the distal end in the insertion direction of the closing plate 14 contacts the bottom surface in the tube 10 to close the inside of the tube 10. When the inside of the tube 10 is closed by the closing plate 14, the surfaces of the tube 10 forming the opening and the projecting portion 12 forming the insertion hole 11 are deformed on the side surface of the closing plate 14 and are in contact with each other. It becomes. As a result, leakage through the opening and the insertion hole 11 can be prevented, and the side surface of the closing plate 14 abuts on the inner wall of the tube 10 to close the flow path. Can be prevented from flowing back.

図１に示す管１０は、図２に示すように、管１０の側面の上半分にスリット状の切り込みを入れることによって、開口１５が形成される。切り込みは、カッタなどの切断手段を使用して形成することができる。例えば、上半分を、約３ｍｍの幅ｗで切断することで、約３ｍｍの幅ｗの開口１５を形成することができる。なお、この開口１５は、管１０の内部へと連通しており、開口１５を通して管１０内に閉鎖板１４を挿入することができる。 As shown in FIG. 2, the tube 10 shown in FIG. 1 has an opening 15 formed by making a slit-like cut in the upper half of the side surface of the tube 10. The cut can be formed using a cutting means such as a cutter. For example, by cutting the upper half with a width w of about 3 mm, the opening 15 with a width w of about 3 mm can be formed. The opening 15 communicates with the inside of the tube 10, and the closing plate 14 can be inserted into the tube 10 through the opening 15.

図１に示す閉鎖板収容部１３は、図３に示すように、例えば、開口１５と同じ約３ｍｍの幅ｗで、管１０の内径に等しい奥行きｄを有する断面矩形の挿通穴１１を有する突出部１２を含み、管１０を挿通させる管挿通穴１６を備える構成とされている。閉鎖板収容部１３を管１０に取り付ける場合、まず、管挿通穴１６に開口１５が形成された管１０を挿通させ、次に、開口１５と挿通穴１１とが一致する位置で固定し、管１０の外側面と閉鎖板収容部１３の管挿通穴１６を形成する内側面とを溶着または溶接するなどして取り付けることができる。なお、閉鎖板１４を挿入する挿通穴１１は、図３に示すように、幅ｗおよび奥行きｄが一定に限らず、挿入方向に縮小した構造であってもよい。例えば、開口１５の幅を約２．８ｍｍとし、その開口１５に隣接する挿通穴１１の幅ｗを約２．８ｍｍとし、離間するにつれて約３ｍｍになるように拡張した構造とすることができる。 As shown in FIG. 3, the closing plate accommodating portion 13 shown in FIG. 1 has, for example, a protrusion having an insertion hole 11 having a rectangular cross section having a width w of about 3 mm that is the same as the opening 15 and a depth d equal to the inner diameter of the tube 10. It is configured to include a tube insertion hole 16 that includes the portion 12 and allows the tube 10 to be inserted therethrough. When attaching the closing plate accommodating portion 13 to the tube 10, first, the tube 10 in which the opening 15 is formed is inserted into the tube insertion hole 16, and then fixed at a position where the opening 15 and the insertion hole 11 coincide with each other. The outer side surface of 10 and the inner side surface forming the tube insertion hole 16 of the closing plate accommodating portion 13 can be attached by welding or welding. As shown in FIG. 3, the insertion hole 11 into which the closing plate 14 is inserted may have a structure in which the width w and the depth d are not limited and are reduced in the insertion direction. For example, the width of the opening 15 may be about 2.8 mm, the width w of the insertion hole 11 adjacent to the opening 15 may be about 2.8 mm, and the structure may be expanded to be about 3 mm as the distance is increased.

図１に示す閉鎖板１４は、図４に示すように、挿入方向の先端１７が管１０内の形状に対応して半円形とされている。なお、図４（ａ）は、正面図を、図４（ｂ）は、側面図を示す。閉鎖板１４の厚さｔは、その先端に向かうにつれて小さくなるようにテーパを形成している。挿通穴１１の幅ｗが約３ｍｍで一定の場合、先端は挿入しやすいように上記約３ｍｍより小さい、例えば約２．８ｍｍとし、末端は、挿通穴１１に入らないように上記約３ｍｍより大きい、例えば約３．２ｍｍとすることができる。また、挿通穴１１の幅ｗが約３ｍｍから約２．８ｍｍに、挿入方向に縮小した構造である場合も、同様のサイズの閉鎖板１４を用いることができる。なお、これら閉鎖板１４の幅Ｗは、挿通穴１１の奥行きｄとほぼ同じとすることができる。これにより、管１０内に、流体を流す場合には、閉鎖板１４によって挿通穴１１を閉鎖するとともに、閉鎖板１４を突出部１２に固定することができ、管１０内を閉鎖する場合には、閉鎖板１４を打ち込むことにより、挿通穴１１を閉鎖するとともに、管１０内を閉鎖することができる。いずれも、挿通穴１１を閉鎖することができるため、挿通穴１１を通して流体が流出することがなく、適切に管１０内に流体を流し、また、逆流を防止することができる。 As shown in FIG. 4, the closing plate 14 shown in FIG. 1 has a semicircular shape with the distal end 17 in the insertion direction corresponding to the shape in the tube 10. 4A shows a front view, and FIG. 4B shows a side view. The thickness t of the closing plate 14 is tapered so as to decrease toward the tip. When the width w of the insertion hole 11 is constant at about 3 mm, the tip is smaller than about 3 mm, for example, about 2.8 mm so that it can be easily inserted, and the end is larger than about 3 mm so as not to enter the insertion hole 11. For example, it can be about 3.2 mm. Further, when the width w of the insertion hole 11 is reduced from about 3 mm to about 2.8 mm in the insertion direction, the same size of the closing plate 14 can be used. In addition, the width W of these closing plates 14 can be made substantially the same as the depth d of the insertion hole 11. Thereby, when flowing a fluid into the tube 10, the insertion hole 11 can be closed by the closing plate 14, and the closing plate 14 can be fixed to the projecting portion 12. When the inside of the tube 10 is closed, By inserting the closing plate 14, the insertion hole 11 can be closed and the inside of the tube 10 can be closed. In any case, since the insertion hole 11 can be closed, the fluid does not flow out through the insertion hole 11, and the fluid can be appropriately flowed into the tube 10, and the backflow can be prevented.

閉鎖板収容部１３および閉鎖板１４の材質は、流体の流れる圧力および逆流による圧力によっては変形せず、適切に挿通穴１１および管１０内を閉鎖することができ、打ち込む際には変形を可能にするものが好ましい。本発明では、鉄、亜鉛めっきした鉄、変形容易なアルミニウムを挙げることができる。その他、閉鎖し、変形可能な材料として、アクリル樹脂、ポリプロピレン、ポリエチレン、フッ素樹脂、ポリ塩化ビニル、アクリロニトリル−ブタジエン−スチレン樹脂（ＡＢＳ樹脂）、スチレン樹脂、ウレタン樹脂などのプラスチック樹脂材料や、天然ゴム、スチレンゴム、ブタジエンゴム、クロロプレンゴム、ブチルゴム、ニトリルゴム、エチレン−プロピレンゴム、ウレタンゴムなどのゴム材料を挙げることもできる。特に、継ぎ手に適用する場合、両端に設けられる２つの連結部の間の連通部と同じ材質であるほうが、打ち込んだ場合に、連通部、閉鎖板、閉鎖板収容部のいずれもが適宜変形して、連通部と閉鎖板の間および閉鎖板と閉鎖板収容部の間を埋め、隙間をなくすことができ、漏れを効果的に防止することができる。一般に、管には鋼管、連通部には鉄、亜鉛めっきした鉄、アルミニウムなどの金属材料が使用されており、プラスチック樹脂材料では、打ち込んだ場合に割れなどを生じやすく、ゴム材料は、摩擦抵抗が大きいため、挿通穴および開口への挿入および打ち込みが困難で、鉄や亜鉛めっきした鉄は、連通部と同じ金属材料ではあるものの、比較的硬いため、打ち込みにくいことから、適切な強度を有し、比較的柔らかく、連通部と同じ金属材料であるアルミニウムが好ましい。本発明では、閉鎖板１４の打ち込みによっても隙間を生じる場合には、さらに、ゴム材料を隙間に挿入し、その隙間を埋めることができる。 The material of the closing plate accommodating portion 13 and the closing plate 14 is not deformed by the fluid flowing pressure and the pressure due to the back flow, and can appropriately close the inside of the insertion hole 11 and the tube 10 and can be deformed when driven. What is made into is preferable. In the present invention, iron, galvanized iron, and easily deformable aluminum can be mentioned. Other materials that can be closed and deformed include plastic resin materials such as acrylic resin, polypropylene, polyethylene, fluororesin, polyvinyl chloride, acrylonitrile-butadiene-styrene resin (ABS resin), styrene resin, urethane resin, and natural rubber. Also, rubber materials such as styrene rubber, butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, ethylene-propylene rubber, and urethane rubber can be exemplified. In particular, when applied to a joint, if the material is the same as the communicating part between the two connecting parts provided at both ends, all of the communicating part, the closing plate, and the closing plate accommodating part will be appropriately deformed when driven. Thus, the gap between the communication portion and the closing plate and between the closing plate and the closing plate housing portion can be filled to eliminate the gap, and leakage can be effectively prevented. Generally, steel pipes are used for pipes, and metal materials such as iron, galvanized iron, and aluminum are used for communication parts. Plastic plastic materials are prone to cracking when driven, and rubber materials are friction resistant. Therefore, it is difficult to insert and drive into the insertion hole and opening.Although iron or galvanized iron is the same metal material as the communication part, it is relatively hard and difficult to drive. However, aluminum which is relatively soft and is the same metal material as the communicating portion is preferable. In the present invention, when a gap is generated even by driving in the closing plate 14, a rubber material can be further inserted into the gap to fill the gap.

図５は、本発明の閉鎖装置に用いられる閉鎖板の第２の実施形態を示した図である。図２に示す閉鎖装置は、閉鎖板収容部は、図１および図３に示す閉鎖板収容部１３と同様であるが、閉鎖板の長手方向の途中まで厚さが一定であり、その途中から先端に向けて厚さが小さくなるようにテーパを形成している。図５（ａ）は、正面図を示し、図５（ｂ）は、側面図を示す。図５に示す閉鎖板２０は、幅Ｗが約２０．２ｍｍ、厚さｔが約３．１ｍｍで長手方向の途中まで一定とされ、長手方向の途中から先端に向けてテーパを形成している。例えば、全体の長さＬが約４５ｍｍとすると、先端から約２０ｍｍ〜２５ｍｍの部分にテーパを形成することができる。図５に示す閉鎖板２０も、図１および図４に示す閉鎖板１４と同様、管１０の内面に沿って半円形とされており、半円形とされた部分の径が約２０ｍｍと小さくされ、厚さも、約２．８ｍｍと小さくされている。このようにすることで、閉鎖板２０をより容易に挿入することができる。なお、このテーパの角度は、大きすぎると、閉鎖板の先端を管１０内の底面に当接させるまで挿入することができず、小さすぎると、隙間を完全に埋めることができないため、約０．３〜約１°であることが好ましい。 FIG. 5 is a view showing a second embodiment of a closing plate used in the closing device of the present invention. In the closing device shown in FIG. 2, the closing plate housing portion is the same as the closing plate housing portion 13 shown in FIGS. 1 and 3, but the thickness is constant halfway in the longitudinal direction of the closing plate. A taper is formed so that the thickness decreases toward the tip. Fig.5 (a) shows a front view and FIG.5 (b) shows a side view. The closing plate 20 shown in FIG. 5 has a width W of about 20.2 mm and a thickness t of about 3.1 mm, which is constant to the middle in the longitudinal direction, and is tapered from the middle in the longitudinal direction toward the tip. . For example, if the entire length L is about 45 mm, a taper can be formed in a portion of about 20 mm to 25 mm from the tip. Similarly to the closing plate 14 shown in FIGS. 1 and 4, the closing plate 20 shown in FIG. 5 is also semicircular along the inner surface of the tube 10, and the diameter of the semicircular portion is reduced to about 20 mm. The thickness is also reduced to about 2.8 mm. By doing in this way, the closing board 20 can be inserted more easily. If the taper angle is too large, the taper cannot be inserted until the end of the closing plate abuts the bottom surface of the tube 10, and if it is too small, the gap cannot be completely filled. .3 to about 1 ° is preferred.

図６は、本発明の閉鎖装置の別の実施形態を示した図である。図６に示す実施形態では、閉鎖板が外れないように、閉鎖板６０および閉鎖板収容部６３に加え、管６２内に挿入された閉鎖板６０の突出部６４から突出する頭部６１と閉鎖板収容部６３とに嵌合する頭部嵌合溝６５と、頭部嵌合溝６５に対向する閉鎖板収容部嵌合溝６６とを備え、閉鎖板６０が挿入された閉鎖板収容部６３を収納することにより閉鎖板６０が外れるのを抑止する、コの字状の収納部材６７を備えている。取り付けは、収納部材６７を、管６２とほぼ同じ高さで、管６２に近隣させて配置し、管６２に向けて移動させ、閉鎖板６０の頭部６１を、収納部材６７の頭部嵌合溝６５に嵌合させるとともに、管６２の下方に突出する閉鎖板収容部６３の一部を、収納部材６７の閉鎖板収容部嵌合溝６６に嵌合させることにより行うことができる。なお、収納部材６７には、供給手段に接続される管またはホースに取り付け可能なひも状の鎖を設けることができ、その管の取り外しとともに、収納部材６７を取り外すことができる。このようにすることで、管の取り外しの際、収納部材６７の落下を防止することができる。本発明では、頭部６１および閉鎖板収容部６３の一部に限らず、管６２および突出部を含めた全体が嵌合する溝を収納部材６７に設けていてもよい。 FIG. 6 is a view showing another embodiment of the closure device of the present invention. In the embodiment shown in FIG. 6, in addition to the closing plate 60 and the closing plate receiving portion 63, the head 61 protruding from the protruding portion 64 of the closing plate 60 inserted into the tube 62 and the closing are provided so that the closing plate does not come off. A closing plate housing portion 63 having a head fitting groove 65 fitted to the plate housing portion 63 and a closing plate housing portion fitting groove 66 opposed to the head fitting groove 65 and having the closing plate 60 inserted therein. A U-shaped storage member 67 is provided to prevent the closing plate 60 from being detached by storing the. For attachment, the storage member 67 is arranged at the same height as the tube 62, arranged close to the tube 62, moved toward the tube 62, and the head 61 of the closing plate 60 is fitted to the head of the storage member 67. This can be achieved by fitting in the mating groove 65 and fitting a part of the closing plate accommodating portion 63 protruding below the tube 62 into the closing plate accommodating portion fitting groove 66 of the accommodating member 67. The storage member 67 can be provided with a string-like chain that can be attached to a pipe or hose connected to the supply means, and the storage member 67 can be removed together with the removal of the pipe. By doing so, the storage member 67 can be prevented from dropping when the tube is removed. In the present invention, not only a part of the head 61 and the closing plate housing part 63, but also a groove in which the whole including the pipe 62 and the protruding part fits may be provided in the housing member 67.

次に、本発明の閉鎖装置を備える継ぎ手を説明する。本発明の継ぎ手は、図１〜図５に示す閉鎖装置を備えるものであるが、ここでは、図１に示す閉鎖装置を備え、連結部に、ねじ部および図８に示すアダプタを備えるものとして説明する。本発明では、連結部は、ねじ部、アダプタのほか、このアダプタと連結されるカプラー、フランジであってもよい。なお、フランジは、ボルトおよびナットを使用して接続される。図７に示す実施形態では、一端が、雄ねじ部７０とされ、他端が、アダプタ７１とされ、雄ねじ部７０とアダプタ７１との間の図示しない連通部の側面に図示しない開口が形成されており、連通部に閉鎖板収容部７２が設けられ、閉鎖板収容部７２の挿通穴７３に閉鎖板７４が挿入されるようになっている。図７に示す実施形態では、連通部は、雄ねじ部７０の一部とされている。この継ぎ手は、すべてがアルミニウムから製造されており、打ち込み時の互いの変形により隙間をなくし、逆流および漏れを効果的に防止することができる。 Next, a joint including the closing device of the present invention will be described. The joint of the present invention is provided with the closing device shown in FIGS. 1 to 5, but here, it is provided with the closing device shown in FIG. explain. In the present invention, the connecting portion may be a screw portion and an adapter, as well as a coupler and a flange connected to the adapter. The flange is connected using bolts and nuts. In the embodiment shown in FIG. 7, one end is a male screw portion 70, the other end is an adapter 71, and an opening (not shown) is formed on a side surface of a communication portion (not shown) between the male screw portion 70 and the adapter 71. In addition, a closing plate accommodating portion 72 is provided in the communication portion, and the closing plate 74 is inserted into the insertion hole 73 of the closing plate accommodating portion 72. In the embodiment shown in FIG. 7, the communication part is a part of the male screw part 70. All of the joints are made of aluminum, and the gaps are eliminated by deformation of each other at the time of driving, so that backflow and leakage can be effectively prevented.

管同士の連結においては、一方の管が、雌ねじとされ、継ぎ手の雄ねじ部７０を螺合することにより接続され、他方の管には、カプラーが連結されており、カプラーのアダプタ収容部に、アダプタ７１を挿入し、カム溝７１ａにカムを係合させ、カムに連続する腕部によってカムを回動させて連結するとともに、アダプタ７１を、アダプタ収容部内に収容される弾性部材に圧接させて水密性を高め、漏れを防止する。 In the connection between the tubes, one of the tubes is a female screw and is connected by screwing the male screw portion 70 of the joint, and a coupler is connected to the other tube. The adapter 71 is inserted, the cam is engaged with the cam groove 71a, the cam is rotated and connected by an arm portion continuous to the cam, and the adapter 71 is pressed against an elastic member accommodated in the adapter accommodating portion. Increase water tightness and prevent leakage.

継ぎ手によって管同士を接続した後、管内に、流体を流す場合には、閉鎖板７４をわずかに打ち込んだ状態とし、挿通穴７３を閉鎖するとともに、突出部７５内に閉鎖板７４を保持させ、固定する。これにより、管内は、閉鎖板７４によって閉鎖されず、かつ挿通穴７３は、閉鎖板７４によって閉鎖することができる。また、わずかに打ち込むことにより、流体の圧力によって閉鎖板７４が押し出されることがなく、確実に挿通穴７３を閉鎖することができる。管内を閉鎖する場合には、閉鎖板７４を、閉鎖板７４の先端が管内の底面に当接するまで打ち込むことにより閉鎖することができる。閉鎖板７４の厚さは、先端から末端にいくにつれて大きくなっており、末端部分では挿通穴７３の幅より大きく、閉鎖板７４の打ち込みよって挿通穴７３を拡張させ、管に設けられた開口も拡張させる。これらは、管と閉鎖板７４および突出部７５と閉鎖板７４の間の連結力を増大させ、それらの間の隙間をなくし、挿通穴７３を完全に閉止する。このように、連結力を増大させた状態で保持されるため、流体の圧力によって簡単に外れることはなく、確実に漏れを防止することができる。 When the fluid is allowed to flow through the pipes after connecting the pipes by the joint, the closing plate 74 is slightly driven in, the insertion hole 73 is closed, and the closing plate 74 is held in the protrusion 75. Fix it. As a result, the inside of the tube is not closed by the closing plate 74, and the insertion hole 73 can be closed by the closing plate 74. Further, by slightly driving in, the closing plate 74 is not pushed out by the pressure of the fluid, and the insertion hole 73 can be reliably closed. When closing the inside of the tube, the closing plate 74 can be closed by driving in until the front end of the closing plate 74 abuts against the bottom surface of the tube. The thickness of the closing plate 74 increases from the tip to the end, and is larger than the width of the insertion hole 73 at the end portion. The insertion hole 73 is expanded by driving the closing plate 74, and an opening provided in the tube is also provided. Expand. These increase the connecting force between the tube and the closing plate 74 and the projection 75 and the closing plate 74, eliminate the gap between them, and completely close the insertion hole 73. In this way, since the coupling force is maintained in an increased state, it is not easily released by the fluid pressure, and leakage can be reliably prevented.

本発明の継ぎ手は、両端が、ねじ部のものであってもよいし、両端にフランジが設けられているものであってもよい。これらの場合、両端にねじまたはフランジが設けられている短管を使用して、上述したように継ぎ手を製作することができる。 Both ends of the joint of the present invention may be threaded parts, or flanges may be provided at both ends. In these cases, joints can be made as described above using short tubes with screws or flanges at both ends.

また、本発明の継ぎ手は、山岳トンネルのＡＧＦおよび注入式フォアポーリング、軟弱地盤の地盤強度を高める地盤改良において使用することができる。例えば、注入式フォアポーリングでは、まず、先端に削孔用のビットを備える削孔機により、切羽から前方地山を削孔するとともに、注入管を挿入する。次に、上述した、側面に開口を備える連通部と、その連通部の一端に設けられる第１の連結部と、その連通部の他端に設けられる第２の連結部と、開口に連続して延びる挿通穴を有する突出部を備え、連通部に周設される閉鎖板収容部と、挿通穴および開口を通して連通部内に挿入され、連通部内を閉鎖する閉鎖板とを含み、閉鎖板の厚さが、閉鎖板の挿入方向に向けて小さくされる継ぎ手の、上記第１の連結部と第２の連結部とにより、注入管と注入材が充填された容器に接続される注入材供給手段とを連結する。このとき、閉鎖板を挿通穴に挿入し、閉鎖板によって挿通穴を閉鎖しつつ、連通部内を閉鎖しないように閉鎖板を突出部に保持する。すなわち、閉鎖板をわずかに打ち込むことにより、挿通穴を確実に閉鎖しつつ、連通部内の流路を確保することができる。したがって、注入材を、この継ぎ手を通して注入管へ供給することができる。次に、ポンプなどの供給手段により、継ぎ手および注入管を通して、注入材を地盤内に圧入する。予め計算された量の注入材の注入が完了したところで、閉鎖板を打ち込み、閉鎖板を連通部内に挿入して連通部内を閉鎖する。これにより、地盤内に圧入した注入材が注入管を介して逆流するのを防止することができる。なお、圧入された注入材は、閉鎖板によって閉鎖されることによって地盤内に均一に浸透し、空隙を埋める。このように、空隙を埋め、均一かつ広く浸透させることにより、良好な改良体を構築することができ、トンネル掘削に伴う変位を防止し、切羽および天端を防護することができる。また、軟弱地盤の改良においても、同様の方法で、注入材を注入することができ、これにより、地盤強度を向上させることができる。 In addition, the joint of the present invention can be used for AGF and injection fore-polling in mountain tunnels, and ground improvement for increasing the ground strength of soft ground. For example, in injection type fore-polling, first, a front ground is drilled from the face by a drilling machine having a drilling bit at the tip, and an injection pipe is inserted. Next, the above-described communication portion having an opening on the side surface, the first connection portion provided at one end of the communication portion, the second connection portion provided at the other end of the communication portion, and the opening are continuous. A closing plate receiving portion provided around the communication portion, and a closing plate inserted into the communication portion through the insertion hole and the opening and closing the communication portion. The injection material supply means connected to the injection tube and the container filled with the injection material by the first connection portion and the second connection portion of the joint that is reduced in the insertion direction of the closing plate And At this time, the closing plate is inserted into the insertion hole, and the closing plate is held by the protruding portion so as not to close the communication portion while closing the insertion hole by the closing plate. That is, by slightly driving the closing plate, it is possible to secure the flow path in the communication portion while reliably closing the insertion hole. Therefore, the injection material can be supplied to the injection tube through this joint. Next, the injection material is press-fitted into the ground through a joint and an injection pipe by a supply means such as a pump. When the injection of the pre-calculated amount of the injection material is completed, the closing plate is driven and the closing plate is inserted into the communication portion to close the communication portion. Thereby, it is possible to prevent the injection material press-fitted into the ground from flowing back through the injection pipe. Note that the injected injection material is evenly penetrated into the ground by being closed by the closing plate and fills the gap. In this way, by filling the gap and infiltrating uniformly and widely, a good improved body can be constructed, displacement due to tunnel excavation can be prevented, and the face and the top can be protected. Moreover, also in the improvement of soft ground, the injection material can be injected by the same method, whereby the ground strength can be improved.

これまで、理解を容易にするために数値を示して説明してきたが、これら数値は例示的なものであり、本発明はこれら数値に限定されるものではない。また、閉鎖板の抜脱しないように設けられる掛止部は、閉鎖板収容部に限らず、アダプタに配設されていてもよい。 Heretofore, numerical values have been shown and described for easy understanding, but these numerical values are illustrative, and the present invention is not limited to these numerical values. Moreover, the latching | locking part provided so that a closing plate may not be removed may be arrange | positioned not only in the closing plate accommodating part but in the adapter.

本発明の閉鎖装置の第１の実施形態を示した図。The figure which showed 1st Embodiment of the closure apparatus of this invention. 管を例示した図。The figure which illustrated the pipe | tube. 本発明の閉鎖装置に用いられる閉鎖板の第１の実施形態を示した図。The figure which showed 1st Embodiment of the closure board used for the closure apparatus of this invention. 本発明の閉鎖装置に用いられる閉鎖板収容部の第１の実施形態を示した図。The figure which showed 1st Embodiment of the closure board accommodating part used for the closure apparatus of this invention. 本発明の閉鎖装置に用いられる閉鎖板の第２の実施形態を示した図。The figure which showed 2nd Embodiment of the closure board used for the closure apparatus of this invention. 本発明の閉鎖装置の別の実施形態を示した図。The figure which showed another embodiment of the closure apparatus of this invention. 本発明の継ぎ手を例示した図。The figure which illustrated the joint of the present invention. カムロックを例示した図。The figure which illustrated the cam lock.

Explanation of symbols

１０、６２…管
１１、７３…挿通穴
１２、６４、７５…突出部
１３、６３、７２…閉鎖板収容部
１４、２０、６０、７４…閉鎖板
１５…開口
１６…管挿通穴
１７…先端
６１…頭部
６５…頭部嵌合溝
６６…閉鎖板収容部嵌合溝
６７…収納部材
７０…雄ねじ部
７１、９０…アダプタ
７１ａ、９１…カム溝
１００…カプラー
１０１…アダプタ収容部
１０２…カム
１０３…腕部
１０４…弾性部材
ｗ、Ｗ…幅
ｄ…奥行き
Ｌ…長さ
ｔ…厚さ 10, 62 ... Tube 11, 73 ... Insertion hole 12, 64, 75 ... Projection part 13, 63, 72 ... Closing plate housing part 14, 20, 60, 74 ... Closing plate 15 ... Opening 16 ... Pipe insertion hole 17 ... Tip 61 ... Head 65 ... Head fitting groove 66 ... Closing plate housing part fitting groove 67 ... Housing member 70 ... Male thread 71, 90 ... Adapter 71a, 91 ... Cam groove 100 ... Coupler 101 ... Adapter housing part 102 ... Cam 103 ... Arm 104 ... Elastic member w, W ... Width d ... Depth L ... Length t ... Thickness

Claims

A closing plate housing portion provided with a protrusion having an insertion hole continuously extending in an opening formed on a side surface of the pipe or the joint, and provided around the pipe or the joint;
A closing plate that is inserted into the pipe or the joint through the insertion hole and the opening, and closes the pipe or the joint ;
A head fitting groove that fits into the head protruding from the protruding portion of the closing plate inserted into the pipe or the joint and the closing plate housing portion, and a closing plate housing that faces the head fitting groove A housing member provided with a part fitting groove ,
The thickness of the closing plate is reduced in the insertion direction of the closing plate, and is inserted into the pipe or the joint by driving, and the closing plate receiving portion into which the closing plate is inserted is inserted into the storage member. A closing device that suppresses the withdrawal of the closing plate by storing .

The closing device according to claim 1, wherein the insertion hole is reduced in the insertion direction of the closing plate.

The closure device according to claim 1 or 2 , characterized in that the closure device is manufactured from aluminum.

With connecting pipes to each other, a joint used for one injection material supplied to the other tube from the tube to close the other of the pipe to prevent reverse flow,
An opening on the side surface, the communicating portion for communicating said with one tube and the other tube,
Provided at one end of the communicating portion, and a first connection for connecting to a tube of the one,
A second connecting portion provided at the other end of the communication portion and connectable to a connecting portion provided in the other pipe;
A closing plate containing portion provided with a projecting portion having an insertion hole extending continuously to the opening, and provided around the communication portion;
A closing plate that is inserted into the communication portion through the insertion hole and the opening and closes the communication portion ;
A head fitting groove that fits into the head protruding from the protruding portion of the closing plate inserted into the communication portion and the closing plate receiving portion, and a closing plate receiving portion fitting that faces the head fitting groove. Including a receiving member provided with a groove ,
The thickness of the closing plate is reduced toward the insertion direction of the closing plate, and the closing plate is inserted into the communication portion by driving , and the closing plate accommodating portion into which the closing plate is inserted is accommodated in the accommodating member. This prevents the withdrawal of the closing plate .

The joint according to claim 4 , wherein the insertion hole is reduced in the insertion direction of the closing plate.

The joint according to claim 4 , wherein the joint is manufactured from aluminum.

The first connecting part and the second connecting part are engaged with the male screw, the female screw, the flange, the adapter having a cam groove on the side surface, the adapter receiving part for storing the adapter and the cam groove, and rotating. The coupling member is selected from a coupler that includes a cam that increases a coupling force, an arm portion that is continuous with the cam, and an elastic member that is accommodated in the adapter accommodating portion and is compressed by the adapter as the coupling force increases. The joint according to any one of 4 to 6 .

A ground improvement method for injecting an injection material into the ground to improve the ground strength,
Digging the ground and inserting the injection tube into the hole;
A communicating portion having an opening on a side surface; a first connecting portion provided at one end of the communicating portion; a second connecting portion provided at the other end of the communicating portion; and an insertion hole extending continuously to the opening. A closing plate receiving portion provided around the communication portion, and a closing plate inserted into the communication portion through the insertion hole and the opening and closing the communication portion. The container is connected to the injection pipe by the first connecting portion whose thickness is reduced in the insertion direction of the closing plate, and is connected to the container filled with the injection material by the second connecting portion. The closing plate is connected to the injection material supply means to be connected, the closing plate is inserted into the insertion hole, and the insertion hole is closed by the closing plate, and the closing plate is formed on the protruding portion so as not to close the inside of the communication portion. Holding, and
Pressing the injection material into the ground by the supply means;
Inserting the closing plate into the communicating portion by driving the closing plate, and closing the communicating portion ;
The head projecting from the projecting portion of the closing plate inserted into the communication portion and the closing plate housing portion, the head fitting groove of the housing member and the closing plate housing portion facing the head fitting groove A ground improvement method comprising: fitting the fitting plate into a fitting groove, housing the closing plate housing portion into which the closing plate is inserted in the housing member, and suppressing removal of the closing plate .