JP3007863U - Check valve for segment grout hole - Google Patents
Check valve for segment grout holeInfo
- Publication number
- JP3007863U JP3007863U JP1994011083U JP1108394U JP3007863U JP 3007863 U JP3007863 U JP 3007863U JP 1994011083 U JP1994011083 U JP 1994011083U JP 1108394 U JP1108394 U JP 1108394U JP 3007863 U JP3007863 U JP 3007863U
- Authority
- JP
- Japan
- Prior art keywords
- hole
- valve body
- check valve
- ring
- attached
- 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
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- Lining And Supports For Tunnels (AREA)
Abstract
(57)【要約】
【目的】 セグメント組立時において地下水及び裏込め
材の漏出を防止する。
【構成】 注入側開口から注入ノズル５をねじ込み可能
な雌ねじ孔６を有し、この雌ねじ孔６の前方の内周面に
平滑なシール面を有する円筒状のホール口金３と、この
ホール口金３の雌ねじ孔６にねじ込み可能な雄ねじ１０
を外周に形成し、この雄ねじ１０の前方の平滑な外周面
にＯリング１２が装着され、底面には裏込め材の流入孔
１３が形成された円筒状の逆止弁本体８と、逆止弁本体
８の中心部に前後に進退自在に設けられ、その外周に前
記流入孔１３の周辺に設けたシール面１４に圧接可能な
Ｏリング１５が装着され、その中心部にはガイドロッド
１６が前方に向かって突設され、その先端は逆止弁本体
８の流出側開口に取付けた通孔２０を有する支持座板１
７の中心孔１８にスライド自在に挿通され、ガイドロッ
ド１６の周囲における弁体９の前面と支持座板１７と間
に圧縮コイルバネ２２が装着された弁体９とからなるこ
とを特徴としている。
(57) [Summary] [Purpose] Prevent leakage of groundwater and backfill material during segment assembly. [Structure] A cylindrical hole cap 3 having an internal thread hole 6 into which an injection nozzle 5 can be screwed from an injection side opening, and having a smooth sealing surface on an inner peripheral surface in front of the internal thread hole 6, and the hole cap 3 Male screw 10 that can be screwed into female screw hole 6
Is formed on the outer circumference, an O-ring 12 is attached to the front smooth outer peripheral surface of the male screw 10, and a cylindrical check valve body 8 having an inflow hole 13 for a backfill material is formed on the bottom surface. An O-ring 15 is provided at the center of the valve body 8 so as to be able to move forward and backward, and an O-ring 15 is attached to the outer periphery of the valve body 8 so as to be in pressure contact with a sealing surface 14 provided around the inflow hole 13. A guide rod 16 is provided at the center of the O-ring 15. A supporting seat plate 1 which is provided so as to project forward and has a through hole 20 attached to the outlet side opening of the check valve body 8 at its tip.
It is characterized in that it is slidably inserted into the center hole 18 of the valve body 7, and is composed of the valve body 9 in which a compression coil spring 22 is mounted between the front face of the valve body 9 around the guide rod 16 and the support seat plate 17.
Description
【０００１】[0001]
この考案は、シールドセグメントのグラウトホールに用いる逆止弁装置に関す るものである。 This invention relates to a check valve device used for a grout hole of a shield segment.
【０００２】[0002]
一般にシールドセグメントにおいては、セグメントの自動組立機でセグメント を掴むときの差込孔と裏決め材の注入口とを兼ねるグラウトホールがあけられて おり、このセグメントの組立後において裏込め注入の注入口となる一部のグラウ トホールに、裏込め材の注入時にはその注入方向の圧力にのみ開いて逆方向の圧 力には閉じる扉状の弁板を筒状の弁本体に取付けた逆止弁をホール口金にねじ込 み、その上で注入ホースの注入ノズルをねじ込んで裏込め材を注入し、注入後に ホール口金の注入口端部に止水栓（プラグ）を取付けている。 In general, a shield segment has a grout hole that doubles as an insertion hole for gripping a segment with an automatic segment assembly machine and an injection port for the backing material.The injection port for backfill injection after assembling this segment. A check valve with a door-shaped valve plate attached to the tubular valve body is opened in some of the grout holes, which opens only when the backfill material is injected and closes when pressure is applied in the opposite direction. After screwing it into the hole cap, screw the injection nozzle of the injection hose into it to inject the backfill material, and after the injection, attach the water stop (plug) to the injection port end of the hole cap.
【０００３】[0003]
上記従来の逆止弁ではホール口金とこれにねじ込んだ弁本体との間のシールが なく、また扉状の弁板に微小な隙間があるため、裏込め材の逆流を防止できる程 度で止水性が不完全で、セグメントの組立後に地下水が逆止弁及び止水栓（プラ グ）を通過してトンネル内に漏出するなどの問題があった。 In the above conventional check valve, there is no seal between the hole mouthpiece and the valve body screwed into it, and there is a minute gap in the door-shaped valve plate, so it can be stopped at a level sufficient to prevent backflow of the backfill material. The water quality was incomplete, and there was a problem that groundwater leaked into the tunnel after passing through the check valve and the water stopcock (plug) after the segment was assembled.
【０００４】[0004]
この考案は前記従来の課題を解決するために、注入側開口から注入ノズル５を ねじ込み可能な雌ねじ孔６を有し、この雌ねじ孔６の前方の内周面に平滑なシー ル面を有する円筒状のホール口金３と、このホール口金３の雌ねじ孔６にねじ込 み可能な雄ねじ１０を外周に形成し、この雄ねじ１０の前方の平滑な外周面にＯ リング１２が装着され、底面には裏込め材の流入孔１３が形成された円筒状の逆 止弁本体８と、この逆止弁本体８の中心部に前後に進退自在に設けられ、その外 周に前記流入孔１３の内周面に前方に向かって径を拡大するテーパー面に形成さ れたシール面１４に圧接可能なＯリング１５が装着され、その中心部にはガイド ロッド１６が前方に向かって突設され、その先端部は逆止弁本体８に取付けた通 孔２０を有する支持座板１７の中心孔１８にスライド自在に挿通され、外周に先 端が逆止弁本体８の内周面に近接する支持ガイド板１９が設けられ、さらに前面 と前記支持座板１７と間におけるガイドロッド１６の周囲に圧縮コイルバネ２２ が装着された弁体９とからなるセグメントのグラウトホール用逆止弁装置を提案 するものである。 In order to solve the above-mentioned conventional problems, the present invention has a female screw hole 6 into which an injection nozzle 5 can be screwed from an injection side opening, and a cylinder having a smooth seal surface on the inner peripheral surface in front of the female screw hole 6. A hole-shaped mouthpiece 3 and a male screw 10 that can be screwed into the female screw hole 6 of the hole mouthpiece 3 are formed on the outer periphery, and an O-ring 12 is attached to the smooth outer peripheral surface in front of the male screw 10, and the bottom surface is A cylindrical check valve body 8 in which an inflow hole 13 for the backfill material is formed, and a check valve body 8 is provided at the center of the check valve body 8 so as to be movable back and forth. An O-ring 15 which can be pressed into contact is attached to a seal surface 14 formed on the surface of the taper surface, the diameter of which expands toward the front, and a guide rod 16 is provided at the center of the seal 15 so as to project toward the front. Has a through hole 20 attached to the check valve body 8 A support guide plate 19 is slidably inserted into a center hole 18 of the seat plate 17, and a front end of the support guide plate 19 is arranged on the outer periphery of the support plate 17. The support guide plate 19 is provided between the front face and the support seat plate 17. The present invention proposes a check valve device for a grout hole of a segment including a valve body 9 having a compression coil spring 22 mounted around the guide rod 16 in FIG.
【０００５】[0005]
裏込め注入のための注入口２とするセグメント１のホール口金３に予め逆止弁 ４を取付けておいてリングに組立てると、Ｏリング１２が逆止弁本体８とホール 口金３との間を止水シールし、また弁板９がシール面１４に圧接して流入孔１３ を閉鎖しているため、地山の地下水が注入口２を通ってシールドトンネル内に漏 出することが防止される。 When the check valve 4 is previously attached to the hole mouthpiece 3 of the segment 1 which is the injection port 2 for backfill injection and assembled into a ring, the O-ring 12 connects the check valve body 8 and the hole mouthpiece 3 to each other. Since the water-tight seal is made and the valve plate 9 is pressed against the sealing surface 14 to close the inflow hole 13, groundwater in the natural ground is prevented from leaking into the shield tunnel through the inlet 2. .
【０００６】 裏込め注入を行う際には、ホール口金３のねじ孔６に注入ホースの注入ノズル ２３をねじ込んで裏込め材を圧送すると、注入ノズル２２から吐出する裏込め材 の注入圧力により弁体９はバネ２２を撓ませて前方に移動し、流入孔１３を開放 して支持ガイド板１９および支持座板１７の通孔２０，２１を通ってセグメント リング外周の地山間隙内に充填する。When performing backfill injection, when the injection nozzle 23 of the injection hose is screwed into the screw hole 6 of the hole mouthpiece 3 and the backfill material is pressure-fed, the valve is driven by the injection pressure of the backfill material discharged from the injection nozzle 22. The body 9 moves forward by bending the spring 22, opens the inflow hole 13, and passes through the through holes 20 and 21 of the support guide plate 19 and the support seat plate 17 to fill the natural clearance on the outer circumference of the segment ring. .
【０００７】 そして注入を停止すると、弁体９はバネ２２により戻されてＯリング１５をシ ール面１４に圧接するため、流入孔１３が閉鎖されて裏込め材のシールドトンネ ル内への漏出が完全に防止され、従来のような止水栓の取付けが不要となる。When the injection is stopped, the valve body 9 is returned by the spring 22 and presses the O-ring 15 against the seal surface 14, so that the inflow hole 13 is closed and the backfill material into the shield tunnel. Leakage is completely prevented, and there is no need to attach a water stopper as in the past.
【０００８】 この場合シール面１４がテーパー面であると、バネ２２の押圧力によりＯリン グ１５にはシール面１４の径が小さくなる方向に押し込み力が働き、Ｏリング１ ５はより圧着力を増して止水性が向上する。In this case, if the sealing surface 14 is a tapered surface, the pressing force of the spring 22 exerts a pushing force on the O-ring 15 in the direction in which the diameter of the sealing surface 14 becomes smaller, and the O-ring 15 has a more pressing force. To improve the waterproofness.
【０００９】[0009]
セグメント１のグラウトホール２には円筒状のホール口金３が埋設固定され、 その内部に逆止弁４がねじ込まれている。 A cylindrical hole cap 3 is embedded and fixed in the grout hole 2 of the segment 1, and a check valve 4 is screwed therein.
【００１０】 ホール口金３は、その注入側開口から注入ノズル５をねじ込み可能な雌ねじ孔 ６が設けられ、この雌ねじ孔６の前方の内周部分に前方に向かって径を縮小する テーパーを付けた平滑なシール面７が形成されている。The hole mouthpiece 3 is provided with an internal thread hole 6 into which the injection nozzle 5 can be screwed from the injection side opening, and a taper is attached to the inner peripheral portion of the front side of the internal thread hole 6 to reduce the diameter toward the front. A smooth sealing surface 7 is formed.
【００１１】 逆止弁４は、円筒状の逆止弁本体８とその中心部に前後に進退自在に設けた弁 体９とから構成されている。The check valve 4 is composed of a cylindrical check valve body 8 and a valve body 9 provided at the center of the check valve body 8 so as to be movable back and forth.
【００１２】 逆止弁本体８には、その外周にホール口金３の雌ねじ孔６にねじ込み可能な雄 ねじ１０が形成され、その前方の平滑な外周面に設けた周溝１１にＯリング１２ が装着されており、このＯリング１２はホール口金３のシール面７に圧着して逆 止弁本体８とホール口金３との間を止水シールしている。The check valve body 8 is formed with a male screw 10 on its outer periphery that can be screwed into the female screw hole 6 of the hole mouthpiece 3, and an O-ring 12 is provided in a circumferential groove 11 provided on the front smooth outer peripheral surface thereof. The O-ring 12 is attached to the sealing surface 7 of the hole cap 3 to make a water-tight seal between the check valve body 8 and the hole cap 3.
【００１３】 逆止弁本体８の底面には裏込め材の流入孔１３が形成され、その内周面には前 方に向かって径を拡大するテーパー面に形成されたシール面１４が形成されてい る。An inflow hole 13 for a backfill material is formed on the bottom surface of the check valve body 8, and a sealing surface 14 formed on the inner peripheral surface of the check valve body 8 is formed as a tapered surface whose diameter increases toward the front. ing.
【００１４】 弁体９はその外周に逆止弁本体８のシール面１４に圧接可能なＯリング１５The valve body 9 has an O-ring 15 that can be pressed against the seal surface 14 of the check valve body 8 on the outer periphery thereof.
【００１５】 が装着され、その中心部にはガイドロッド１６が前方に向かって突設され、その 先端は逆止弁本体８の流出側開口に取付けた支持座板１７の中心孔１８にスライ ド自在に挿通されており、また弁体９の外周に先端が逆止弁本体８の内周面に近 接する支持ガイド板１９が設けられている。A guide rod 16 is provided at the center thereof so as to project forward, and the tip of the guide rod 16 slides into a center hole 18 of a support seat plate 17 attached to an outlet side opening of the check valve body 8. A support guide plate 19 is provided which is freely inserted and whose tip is in close contact with the inner peripheral surface of the check valve body 8 on the outer periphery of the valve body 9.
【００１６】 支持座板１７および支持ガイド板１９には孔又は切欠きなどの通孔２０，２１ が設けられていて、この板体部分を裏込め材が自由に流通できるようになってい る。The support seat plate 17 and the support guide plate 19 are provided with through holes 20 and 21 such as holes or notches, and the backfill material can freely flow through these plate portions.
【００１７】 ガイドロッド１６の周囲には、弁体９の前面と支持座板１７と間に圧縮コイル バネ２２が装着されており、このバネ２２によって弁体９はその後方に裏込め注 入圧程度の弾圧力を付与されて通常の状態においては外周のＯリング１５を逆止 弁本体８のシール面１４に圧接し、逆止弁本体８の流入孔１３を閉鎖している。A compression coil spring 22 is mounted around the guide rod 16 between the front surface of the valve body 9 and the support seat plate 17, and this spring 22 causes the valve body 9 to be backfilled with a back pressure. In a normal state with a certain amount of elastic force applied, the O-ring 15 on the outer circumference is pressed against the sealing surface 14 of the check valve body 8 to close the inflow hole 13 of the check valve body 8.
【００１８】 以上の構成において、裏込め注入のための注入口２とするセグメント１のホー ル口金３に予め逆止弁４を取付けておいてリングに組立てると、図１に示すよう にＯリング１２が逆止弁本体８とホール口金３との間を止水シールし、弁板９が シール面１４に圧接して流入孔１３を閉鎖しているため、地山の地下水が注入口 ２を通ってシールドトンネル内に漏出することを確実に防止することができる。In the above structure, when the check valve 4 is attached in advance to the hole mouthpiece 3 of the segment 1 which is the injection port 2 for backfill injection, and is assembled into a ring, an O-ring is obtained as shown in FIG. 12 seals the water between the check valve body 8 and the hole cap 3, and the valve plate 9 presses the sealing surface 14 to close the inflow hole 13. It can be reliably prevented from leaking into the shield tunnel.
【００１９】 このような状態において裏込め注入を行う際には、ホール口金３のねじ孔６に 注入ホースの注入ノズル５をねじ込んで裏込め材を圧送すると、注入ノズル２２ から吐出する裏込め材の注入圧力により弁体９はバネ２２を撓ませて前方に移動 し、流入孔１３を開放して支持ガイド板１９および支持座板１７の通孔２０，２ １を通ってセグメントリング外周の地山間隙内に充填する。When performing backfill injection in such a state, when the injection nozzle 5 of the injection hose is screwed into the screw hole 6 of the hole mouthpiece 3 and the backfill material is pressure-fed, the backfill material is discharged from the injection nozzle 22. The valve body 9 moves forward by bending the spring 22 due to the injection pressure of the above, opens the inflow hole 13 and passes through the through holes 20, 21 of the support guide plate 19 and the support seat plate 17 and the ground ring segment outer peripheral surface. Fill into the mountain gap.
【００２０】 そして注入を停止すると、弁体９はバネ２２により戻されてＯリング１５をシ ール面１４に圧接するため、裏込め材のシールドトンネル内への漏出を防止する ことができる。When the injection is stopped, the valve body 9 is returned by the spring 22 and presses the O-ring 15 against the seal surface 14, so that leakage of the backfill material into the shield tunnel can be prevented.
【００２１】[0021]
以上の通りこの考案によれば、セグメント組立時において地山の地下水が注入 口を通ってシールドトンネル内に漏出することを確実に防止することができ、ま た裏込め注入時にはその注入圧で自動的に逆止弁を開いて裏込め材をセグメント リング外周の地山間隙内に充填することができると共に、注入停止と同時に逆止 弁を閉じて裏込め材のシールドトンネル内への漏出を防止することができ、従来 のような止水栓の取付けが不要となる。 As described above, according to the present invention, it is possible to reliably prevent groundwater in the ground from leaking into the shield tunnel through the injection port when assembling the segment, and at the time of backfilling injection, the injection pressure is automatically used. The non-return valve can be opened automatically to fill the backfill material into the ground clearance around the outer circumference of the segment ring, and at the same time as the injection is stopped, the nonreturn valve is closed to prevent the backfill material from leaking into the shield tunnel. Therefore, it is not necessary to attach a water stopper as in the past.
【００２２】 シール面がテーパー面である場合には、バネの押圧力によりＯリングにはシー ル面の径が小さくなる方向に押し込み力が働き、Ｏリングはより圧着力を増して 止水性を向上することができる。When the sealing surface is a tapered surface, the O-ring exerts a pushing force in the direction in which the diameter of the seal surface decreases due to the pressing force of the spring, and the O-ring further increases the crimping force to prevent water blocking. Can be improved.
【図１】この考案のグラウトホールの注入前の状態を示
す縦断側面図。FIG. 1 is a vertical sectional side view showing a state before injection of a grout hole of the present invention.
【図２】この考案のグラウトホールの注入中の状態を示
す縦断側面図。FIG. 2 is a vertical sectional side view showing a state during the injection of the grout hole of the present invention.
【図３】この考案に係る逆止弁の部分横断平面図。FIG. 3 is a partial cross-sectional plan view of the check valve according to the present invention.
１ セグメント ２ グラウトホール ３ ホール口金 ４ 逆止弁 ５ 注入ノズル ６ 雌ねじ孔６ ７ シール面 ８ 逆止弁本体 ９ 弁体 １０ 雄ねじ １１ 周溝 １２ Ｏリング １３ 流入孔 １４ シール面 １５ Ｏリング １６ ガイドロッド １７ 支持座板 １８ 中心孔 １９ 支持ガイド板 ２０ 通孔 ２１ 通孔 ２２ バネ 1 segment 2 grout hole 3 hole cap 4 check valve 5 injection nozzle 6 female screw hole 6 7 sealing surface 8 check valve body 9 valve body 10 male screw 11 peripheral groove 12 O-ring 13 inlet hole 14 sealing surface 15 O-ring 16 guide rod 17 Support Seat Plate 18 Center Hole 19 Support Guide Plate 20 Through Hole 21 Through Hole 22 Spring
Claims (2)
可能な雌ねじ孔６を有し、この雌ねじ孔６の前方の内周
面に平滑なシール面を有する円筒状のホール口金３と、
このホール口金３の雌ねじ孔６にねじ込み可能な雄ねじ
１０を外周に形成し、この雄ねじ１０の前方の平滑な外
周面にＯリング１２が装着され、底面には裏込め材の流
入孔１３が形成された円筒状の逆止弁本体８と、逆止弁
本体８の中心部に前後に進退自在に設けられ、その外周
に前記流入孔１３の周辺に設けたシール面１４に圧接可
能なＯリング１５が装着され、その中心部にはガイドロ
ッド１６が前方に向かって突設され、その先端部は逆止
弁本体８に取付けた通孔２０を有する支持座板１７の中
心孔１８にスライド自在に挿通され、ガイドロッド１６
の周囲における弁体９の前面と前記支持座板１７と間に
圧縮コイルバネ２２が装着された弁体９とからなること
を特徴とするセグメントのグラウトホール用逆止弁装
置。1. A cylindrical hole cap 3 having an internal thread hole 6 into which an injection nozzle 5 can be screwed in from an injection side opening, and having a smooth sealing surface on an inner peripheral surface in front of the internal thread hole 6,
A male screw 10 that can be screwed into the female screw hole 6 of the hole mouthpiece 3 is formed on the outer periphery, an O-ring 12 is attached to a smooth outer peripheral surface in front of the male screw 10, and an inflow hole 13 for a backfill material is formed on the bottom surface. And a cylindrical check valve body 8 and an O-ring which is provided at the center of the check valve body 8 so as to be able to move forward and backward, and which can be pressed against a sealing surface 14 provided around the inflow hole 13 on the outer periphery thereof. 15 is mounted, a guide rod 16 is provided at the center thereof so as to project forward, and the tip end thereof is slidable in the center hole 18 of the support seat plate 17 having the through hole 20 attached to the check valve body 8. The guide rod 16
A check valve device for a grout hole of a segment, comprising a valve body 9 having a compression coil spring 22 mounted between the front surface of the valve body 9 and the support seat plate 17 around the periphery of the valve body 9.
可能な雌ねじ孔６を有し、この雌ねじ孔６の前方の内周
面に平滑なシール面を有する円筒状のホール口金３と、
このホール口金３の雌ねじ孔６にねじ込み可能な雄ねじ
１０を外周に形成し、この雄ねじ１０の前方の平滑な外
周面にＯリング１２が装着され、底面には裏込め材の流
入孔１３が形成された円筒状の逆止弁本体８と、この逆
止弁本体８の中心部に前後に進退自在に設けられ、その
外周に前記流入孔１３の内周面に前方に向かって径を拡
大するテーパー面に形成されたシール面１４に圧接可能
なＯリング１５が装着され、その中心部にはガイドロッ
ド１６が前方に向かって突設され、その先端部は逆止弁
本体８に取付けた通孔２０を有する支持座板１７の中心
孔１８にスライド自在に挿通され、外周に先端が逆止弁
本体８の内周面に近接する支持ガイド板１９が設けら
れ、さらに前面と前記支持座板１７と間におけるガイド
ロッド１６の周囲に圧縮コイルバネ２２が装着された弁
体９とからなることを特徴とするセグメントのグラウト
ホール用逆止弁装置。2. A cylindrical hole cap 3 having an internal thread hole 6 into which an injection nozzle 5 can be screwed in from an injection side opening, and having a smooth sealing surface on the inner peripheral surface in front of this internal thread hole 6,
A male screw 10 that can be screwed into the female screw hole 6 of the hole mouthpiece 3 is formed on the outer periphery, an O-ring 12 is attached to a smooth outer peripheral surface in front of the male screw 10, and an inflow hole 13 for a backfill material is formed on the bottom surface. The check valve body 8 has a cylindrical shape, and the check valve body 8 is provided at the center of the check valve body 8 so as to be movable back and forth. The diameter of the check valve body 8 is enlarged toward the front on the inner peripheral surface of the inflow hole 13. An O-ring 15 capable of press-contacting is attached to a seal surface 14 formed on a taper surface, a guide rod 16 is provided at a central portion thereof so as to project forward, and a front end portion of the O-ring 15 is attached to a check valve body 8. A support guide plate 19 which is slidably inserted into a center hole 18 of a support seat plate 17 having a hole 20 and whose tip is close to the inner peripheral surface of the check valve body 8 is provided, and the front surface and the support seat plate are provided. 17 around the guide rod 16 between Check valve device grout holes of the segment condensation coil spring 22 is characterized by comprising the valve body 9 for mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1994011083U JP3007863U (en) | 1994-08-12 | 1994-08-12 | Check valve for segment grout hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1994011083U JP3007863U (en) | 1994-08-12 | 1994-08-12 | Check valve for segment grout hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3007863U true JP3007863U (en) | 1995-02-28 |
Family
ID=43143701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1994011083U Expired - Lifetime JP3007863U (en) | 1994-08-12 | 1994-08-12 | Check valve for segment grout hole |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3007863U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012021395A (en) * | 2011-08-29 | 2012-02-02 | Metro Kaihatsu Kk | Water cut-off structure of backfill material filling hole and refilling method of backfill material |
| JP2015143422A (en) * | 2014-01-31 | 2015-08-06 | メトロ開発株式会社 | Check valve having high water cutoff performance |
| WO2019170932A1 (en) * | 2018-03-09 | 2019-09-12 | Acciona Constucción, S.A. | Leaktight arrangement |
| JP7512826B2 (en) | 2020-10-01 | 2024-07-09 | 株式会社大林組 | Grout injection structure, segment equipped with said injection structure, and grout injection method |
-
1994
- 1994-08-12 JP JP1994011083U patent/JP3007863U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012021395A (en) * | 2011-08-29 | 2012-02-02 | Metro Kaihatsu Kk | Water cut-off structure of backfill material filling hole and refilling method of backfill material |
| JP2015143422A (en) * | 2014-01-31 | 2015-08-06 | メトロ開発株式会社 | Check valve having high water cutoff performance |
| WO2019170932A1 (en) * | 2018-03-09 | 2019-09-12 | Acciona Constucción, S.A. | Leaktight arrangement |
| JP7512826B2 (en) | 2020-10-01 | 2024-07-09 | 株式会社大林組 | Grout injection structure, segment equipped with said injection structure, and grout injection method |
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