JP6076323B2 - Grout injection equipment - Google Patents
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- JP6076323B2 JP6076323B2 JP2014247244A JP2014247244A JP6076323B2 JP 6076323 B2 JP6076323 B2 JP 6076323B2 JP 2014247244 A JP2014247244 A JP 2014247244A JP 2014247244 A JP2014247244 A JP 2014247244A JP 6076323 B2 JP6076323 B2 JP 6076323B2
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Description
本発明は、グラウト注入装置に関する。 The present invention relates to a grout injection apparatus.
地下の有効活用として、トンネルなどの地下構造物が地盤中に構築される。このようなトンネルは、一般に地盤と一体化して機能するように設計されている。したがって、施工上の都合や施工後における地盤土の動きなどによってトンネルと地盤との間に空洞ができた場合、あるいは、地盤中に自然に空洞ができた場合には、この空洞を埋めなければ不都合が生じる。この空洞は、セメントやモルタルなどの流動性を有するグラウトを注入することにより埋められるが、グラウトの注入作業は、トンネルの壁体に設けられているグラウトホールを利用して行われる。具体的には、グラウトホールに注入管を備えた注入装置を取り付けるとともに、別途用意したエア抜き管を取り付け、グラウト注入時における残留エアをエア抜き管で排出しながら、注入管からグラウトを空洞に注入することで、グラウトが充填される。 As an effective use of the underground, underground structures such as tunnels are built in the ground. Such a tunnel is generally designed to function integrally with the ground. Therefore, if there is a cavity between the tunnel and the ground due to construction reasons or the movement of the ground after construction, or if there is a natural cavity in the ground, this cavity must be filled. Inconvenience arises. This cavity is filled by injecting fluid grout such as cement or mortar. The grout injecting operation is performed using a grout hole provided in the wall of the tunnel. Specifically, an injection device equipped with an injection pipe is attached to the grout hole, and a separately prepared air vent pipe is attached, and residual air at the time of grout injection is exhausted by the air vent pipe, and the grout is made hollow from the injection pipe. The grout is filled by pouring.
しかしながら、上記した従来のグラウト注入作業では、注入管の取り付けとともにエア抜きパイプを取り付ける必要があり、確実なエア抜きパイプの接続が要求されるうえ、その取り付けに多大な労力及び時間が費やされる。 However, in the conventional grout injection operation described above, it is necessary to attach the air vent pipe together with the attachment of the injection pipe, and a reliable connection of the air vent pipe is required, and much labor and time are spent for the attachment.
本発明は、上記問題に着目してなされたものであり、エア抜きパイプの取り付けに要する労力や時間の無駄をなくし、グラウト注入時に確実にエア抜きを行うことができるグラウト注入装置を提供することを目的とする。 The present invention has been made paying attention to the above problems, and provides a grout injection device that eliminates the waste of labor and time required to install an air bleeding pipe and can reliably perform air bleeding at the time of grout injection. With the goal.
本発明の上記目的は、地下構造物の壁体を貫通する貫通孔に固定される取付治具と、
前記取付治具に取り付け可能なプラグと、一端及び他端がそれぞれ前記プラグの一方面側及び他方面側に位置するように前記プラグに取り付けられ、前記一端にグラウト注入ホースが取り付けられるとともに前記他端側にグラウトを吐出する吐出口を有する注入管と、一端及び他端がそれぞれ前記プラグの一方面側及び他方面側に位置するように前記プラグに前記注入管と並列に取り付けられ、前記他端が地下構造物と地盤との間の空洞を地盤手前まで延びるエア抜きパイプと、を備え、前記取付治具は、貫通孔に嵌め込まれる円筒状部を備え、前記円筒状部の内周面には雌ねじが形成されており、前記プラグは、前記円筒状部の内周面の雌ねじと螺合する雄ねじが外周面に形成されているグラウト注入装置によって達成される。
The above object of the present invention is to provide a mounting jig that is fixed to a through hole that penetrates a wall of an underground structure ,
A plug that can be attached to the attachment jig , attached to the plug so that one end and the other end are located on one side and the other side of the plug, respectively, and a grout injection hose is attached to the one end and the other An injection pipe having a discharge port for discharging grout on the end side, and one end and the other end of the injection pipe are mounted in parallel with the injection pipe so that the one end and the other end are located on one side and the other side of the plug; An air vent pipe whose end extends through the cavity between the underground structure and the ground to the near side of the ground, and the mounting jig includes a cylindrical portion fitted into the through hole, and an inner peripheral surface of the cylindrical portion The plug is achieved by a grout injection device in which a male screw that engages with a female screw on the inner peripheral surface of the cylindrical portion is formed on the outer peripheral surface .
上記構成のグラウト注入装置において、前記エア抜きパイプは、長さ調節のために切断可能であることが好ましい。 In the grout injection device having the above-described configuration, it is preferable that the air vent pipe can be cut for length adjustment.
また、前記エア抜きパイプは、前記プラグに対してスライド可能に取り付けられることが好ましい。 Further, it is preferable that the air vent pipe is slidably attached to the plug.
また、前記注入管の前記吐出口には、前記注入管内でのグラウトの逆流を阻止する逆止弁が設けられていることが好ましい。 Further, it is preferable that a check valve for preventing a backflow of grout in the injection pipe is provided at the discharge port of the injection pipe.
また、前記エア抜きパイプの一端からグラウトが漏れ出る際に前記エア抜きパイプの一端に取り付けられるキャップをさらに備えることが好ましい。 In addition, it is preferable to further include a cap attached to one end of the air vent pipe when a grout leaks from one end of the air vent pipe.
本発明のグラウト注入装置によれば、エア抜きパイプの取り付けに要する労力や時間の無駄をなくすことができるとともに、グラウト注入時に確実にエア抜きを行うことができることができる。 According to the grouting apparatus of the present invention, it is possible to eliminate the labor and time required for attaching the bleed pipe, and it is possible to perform bleed without fail during grouting.
図１は、本発明の一実施形態に係るグラウト注入装置１の概略構成を示す正面図である。本実施形態のグラウト注入装置１は、図４に示すように、地盤１７中に構築されるトンネルなどの地下構造物１０と地盤１７との間に形成される空洞Ｓにセメントやモルタルなどのグラウトを注入してこの空洞Ｓを埋めるためのものであり、地下構造物１０に設けられた貫通孔（グラウトホール）１１に固定される取付治具１２に取り付け可能なプラグ２と、プラグ２に固定される注入管３及びエア抜きパイプ４とを備えている。 FIG. 1 is a front view showing a schematic configuration of a grout injection apparatus 1 according to an embodiment of the present invention. As shown in FIG. 4, the grout injection device 1 of the present embodiment includes a grout such as cement and mortar in a cavity S formed between an underground structure 10 such as a tunnel constructed in the ground 17 and the ground 17. Plug 2 that can be attached to a mounting jig 12 that is fixed to a through hole (grout hole) 11 provided in the underground structure 10 and fixed to the plug 2. An injection pipe 3 and an air vent pipe 4 are provided.
貫通孔１１は、地下構造物１０（トンネル）の施工時の裏込め材の注入などのために、地下構造物１０（トンネル）の壁体に所定間隔をあけて形成されているものである。貫通孔１１には、例えば、図２に示すような取付治具１２が固定されている。この取付治具１２は、貫通孔１１に嵌め込まれる円筒状部１２Ａと、貫通孔１１の周縁に突き当たるフランジ部１２Ｂとを備えている。フランジ部１２Ｂには、取付治具１２を地下構造物１０（トンネル）の壁体に固定するための固定孔１２Ｃが複数設けられており、固定孔１２Ｃにアンカーボルト１３を挿入して壁体にねじ込むことにより取付治具１２が壁体に固定されている。また、円筒状部１２Ａの内周面には、雌ねじ１４が形成されている。 The through-holes 11 are formed at predetermined intervals on the wall of the underground structure 10 (tunnel) for the purpose of injecting a backfilling material during construction of the underground structure 10 (tunnel). For example, an attachment jig 12 as shown in FIG. 2 is fixed to the through hole 11. The mounting jig 12 includes a cylindrical portion 12 </ b> A that is fitted into the through hole 11, and a flange portion 12 </ b> B that abuts on the periphery of the through hole 11. The flange portion 12B is provided with a plurality of fixing holes 12C for fixing the mounting jig 12 to the wall of the underground structure 10 (tunnel), and anchor bolts 13 are inserted into the fixing holes 12C to form the wall body. The mounting jig 12 is fixed to the wall body by screwing. An internal thread 14 is formed on the inner peripheral surface of the cylindrical portion 12A.
プラグ２は、図１に示すように、所定の厚みを有する平面視円形状の円板からなり、外周面に取付治具１２の内周面の雌ねじ１４と螺合する雄ねじ２０が形成されている。プラグ２を取付治具１２にねじ止めすることにより、プラグ２が貫通孔１１に取り付けられる。なお、プラグ２は、必ずしも予め地下構造物１０（トンネル）の壁体に形成された貫通孔１１だけに取り付けられるものではなく、新たに地下構造物１０（トンネル）の壁体に貫通孔１１を形成し、この貫通孔１１に取付治具１２を固定することによっても、取り付けることができる。 As shown in FIG. 1, the plug 2 is made of a circular plate having a predetermined thickness and has a circular shape in a plan view. A male screw 20 is formed on the outer peripheral surface to be engaged with the female screw 14 on the inner peripheral surface of the mounting jig 12. Yes. The plug 2 is attached to the through hole 11 by screwing the plug 2 to the attachment jig 12. The plug 2 is not necessarily attached only to the through-hole 11 formed in the wall of the underground structure 10 (tunnel) in advance, but the through-hole 11 is newly added to the wall of the underground structure 10 (tunnel). It can also be attached by forming and fixing the attachment jig 12 to the through hole 11.
プラグ２には、板面を貫通する平面視円形状の取付孔２１，２２が２つ並んで形成されており、一方の取付孔２１には注入管３が、他方の取付孔２２にはエア抜きパイプ４が、並列して取り付けられる。 The plug 2 is formed with two mounting holes 21 and 22 having a circular shape in plan view penetrating the plate surface. The injection tube 3 is provided in one mounting hole 21 and the air is provided in the other mounting hole 22. The extraction pipe 4 is attached in parallel.
注入管３は、図１に示すように、所定の肉厚を有し、一端が開口し、他端が閉塞した円筒状のものであり、例えば金属やプラスチックなどにより形成される。注入管３は、一端及び他端がそれぞれプラグ２の一方面側（つまりは地下構造物１０（トンネル）側）及び他方面側（つまりは地盤側）に位置するように取付孔２１に取り付けられる。注入管３の取付孔２１への取り付け方法としては、注入管３の外径を取付孔２１の径と略同じにし、注入管３を取付孔２１に嵌め込むことで固定できるが、注入管３の他端側の外径を一端側の外径よりも大きく形成する、もしくは、他端側の外周面にカバーを巻き付けて一端側よりも外径を大きく形成すれば、注入管３の他端側がプラグ２の取付孔２１から抜け出るのを確実に防止することができる。本実施形態では、注入管３の他端側の外周面に、逆止弁５としてのゴムチューブが巻き付けられており、注入管３の他端側の外径が取付孔２１の径よりも大きく、注入管３の他端側がストッパーとなって取付孔２１から抜け出るのが確実に防止されている。 As shown in FIG. 1, the injection tube 3 has a predetermined thickness, is cylindrical with one end opened and the other end closed, and is formed of, for example, metal or plastic. The injection tube 3 is attached to the attachment hole 21 so that one end and the other end are located on one side of the plug 2 (that is, the underground structure 10 (tunnel) side) and the other side (that is, the ground side), respectively. . As a method for attaching the injection tube 3 to the attachment hole 21, the outer diameter of the injection tube 3 can be made substantially the same as the diameter of the attachment hole 21, and the injection tube 3 can be fixed by fitting into the attachment hole 21. If the outer diameter of the other end side is formed larger than the outer diameter of one end side, or if the outer diameter is made larger than the one end side by winding a cover around the outer peripheral surface of the other end side, the other end of the injection tube 3 It is possible to reliably prevent the side from coming out of the mounting hole 21 of the plug 2. In the present embodiment, a rubber tube as the check valve 5 is wound around the outer peripheral surface of the other end side of the injection tube 3, and the outer diameter of the other end side of the injection tube 3 is larger than the diameter of the mounting hole 21. The other end side of the injection tube 3 serves as a stopper and is reliably prevented from coming out of the mounting hole 21.
注入管３の一端側の開口３０には、ポンプＰから延長されるグラウト注入ホース１５がコネクタ１６を介して取り付けられ、ポンプＰにより圧送されるグラウトがグラウト注入ホース１５を通って供給される（図５〜図８を参照）。注入管３の他端側の外周面には、複数の吐出口３１が形成されており、一端側の開口３０から供給されるグラウトが、注入管３の内部空間を通って、他端側の吐出口３１から排出される。注入管３の吐出口３１には、グラウトの逆流を阻止するための逆止弁５が取り付けられている。本実施形態では、逆止弁５はゴムチューブにより構成されており、注入管３の他端側に吐出口３１を覆うように円筒形のゴムチューブが巻き付けられている。ゴムチューブには、吐出口３１と対向する位置にスリット（図示せず）が形成されており、注入管３内を通る圧送されたグラウトは、吐出口３１からスリットを通って排出される。ゴムチューブは、注入管３の他端側にバンド６により固定されている。 A grout injection hose 15 extending from the pump P is attached to the opening 30 on one end side of the injection pipe 3 via a connector 16, and grout pumped by the pump P is supplied through the grout injection hose 15 ( (See FIGS. 5-8). The outer peripheral surface of the other end of the injection tube 3 is a plurality of discharge ports 31 are formed, grout supplied from the opening 30 at one end, through the interior space of the injection tube 3, the other end It is discharged from the discharge port 31. A check valve 5 for preventing the backflow of the grout is attached to the discharge port 31 of the injection pipe 3. In the present embodiment, the check valve 5 is constituted by a rubber tube, and a cylindrical rubber tube is wound around the other end side of the injection tube 3 so as to cover the discharge port 31. In the rubber tube, a slit (not shown) is formed at a position facing the discharge port 31, and the grout fed through the injection tube 3 is discharged from the discharge port 31 through the slit. The rubber tube is fixed to the other end side of the injection tube 3 by a band 6.
エア抜きパイプ４は、上記空洞Ｓへのグラウト注入時に、空洞Ｓに存在する残留エアを排出するものであり、図１に示すように、両端が開口した円筒状のものである。エア抜きパイプ４は、一端及び他端がそれぞれプラグ２の一方面側（つまりは地下構造物１０（トンネル）側）及び他方面側（つまりは地盤側）に位置するように取付孔２２に取り付けられる。エア抜きパイプ４の取付孔２２への取り付け方法としては、エア抜きパイプ４の外径を取付孔２２の径と略同じにし、エア抜きパイプ４を取付孔２２に嵌め込むことで固定できるが、エア抜きパイプ４の他端側の外径を一端側の外径よりも大きく形成する、もしくは、他端側の外周面にカバーを巻き付けて一端側よりも外径を大きく形成すれば、エア抜きパイプ４の他端側がプラグ２の取付孔２２から抜け出るのを確実に防止することができる。エア抜きパイプ４は、その長さ（全長）を調節することができるように適当な位置で切断可能な素材で形成され、例えばプラスチックやゴムなどにより形成することができる。エア抜きパイプ４の他端は地下構造物１０（トンネル）と地盤との間の空洞Ｓを地盤手前まで延びている。ここで、エア抜きパイプ４の他端が地盤手前まで延びるとは、エア抜きパイプ４の他端と地盤との間隔ができるだけ小さい位置まで延びていることを意味している。上記間隔としては、必ずしも限定されるものではないが、０ｍｍよりも大きく５ｍｍよりも小さい間隔を例示することができる。 The air vent pipe 4 discharges residual air present in the cavity S when the grout is injected into the cavity S, and has a cylindrical shape with both ends opened as shown in FIG. The air vent pipe 4 is attached to the attachment hole 22 so that one end and the other end thereof are located on one side of the plug 2 (that is, the underground structure 10 (tunnel) side) and the other side (that is, the ground side), respectively. It is done. As a method of attaching the air bleeding pipe 4 to the mounting hole 22, the outer diameter of the air bleeding pipe 4 can be fixed to be approximately the same as the diameter of the mounting hole 22 and the air bleeding pipe 4 is fitted into the mounting hole 22. If the outer diameter on the other end side of the air vent pipe 4 is formed larger than the outer diameter on one end side, or if the outer diameter is made larger than the one end side by winding a cover around the outer peripheral surface on the other end side, It is possible to reliably prevent the other end side of the pipe 4 from coming out of the mounting hole 22 of the plug 2. The air vent pipe 4 is formed of a material that can be cut at an appropriate position so that its length (full length) can be adjusted, and can be formed of, for example, plastic or rubber. The other end of the air vent pipe 4 extends through the cavity S between the underground structure 10 (tunnel) and the ground to the near side of the ground. Here, the fact that the other end of the air bleeding pipe 4 extends to the front of the ground means that the distance between the other end of the air bleeding pipe 4 and the ground extends to a position as small as possible. Although it does not necessarily limit as said space | interval, The space | interval larger than 0 mm and smaller than 5 mm can be illustrated.
また、グラウト注入装置１は、後述するように、エア抜きパイプ４の一端からグラウトが漏れ出る際に、エア抜きパイプ４の一端に取り付けられるキャップ７（図８及び図９に示す）をさらに備えている。このキャップ７は、エア抜きパイプ４の一端の開口を塞ぐことができるものであれば、いかなる形状のものであってもよい。 The grout injection device 1 further includes a cap 7 (shown in FIGS. 8 and 9) attached to one end of the air vent pipe 4 when the grout leaks from one end of the air vent pipe 4, as will be described later. ing. The cap 7 may have any shape as long as it can block the opening at one end of the air bleeding pipe 4.
また、グラウト注入装置１は、後述するように、グラウト注入作業が終了した後、取付治具１２に取り付けられ、貫通孔１１を閉塞する蓋体８（図３に示す）をさらに備えている。蓋体８は、一端が閉塞し、他端が開口する円筒状のものであり、外周面に取付治具１２の内周面の雌ねじ１４と螺合する雄ねじ８０を有するとともに、内部には注入管３やエア抜きパイプ４の一端を収容可能な空間を有している。 In addition, as will be described later, the grout injection device 1 further includes a lid 8 (shown in FIG. 3) that is attached to the attachment jig 12 and closes the through hole 11 after the grout injection operation is completed. The lid 8 has a cylindrical shape with one end closed and the other end opened. The lid 8 has a male screw 80 that engages with the female screw 14 on the inner peripheral surface of the mounting jig 12 on the outer peripheral surface, and is injected into the inside. A space that can accommodate one end of the pipe 3 and the air vent pipe 4 is provided.
次に、図４〜図９を参照して、上記構成のグラウト注入装置１を用いて、地下構造物１０（トンネル）と地盤１７との間に形成される空洞Ｓにグラウトを注入するグラウト注入作業について説明する。まず、エア抜きパイプ４を貫通孔１１から空洞Ｓに、先端（他端）が地盤１７に突き当たるまで挿入するなどして、空洞Ｓまでの長さを測定する。そして、エア抜きパイプ４の他端が地盤１７手前まで延びる、つまりはエア抜きパイプ４の他端と地盤１７との間隔が数ｍｍ程度となるよう、エア抜きパイプ４を切断してエア抜きパイプ４の長さを調節する。そして、プラグ２の取付孔２１にエア抜きパイプ４を嵌め込み、プラグ２を貫通孔１１の取付治具１２に取り付け、エア抜きパイプ４の他端と地盤１７との間の隙間より、エア抜きパイプ４からエアが抜け出ることを確認する（図４）。 Next, referring to FIG. 4 to FIG. 9, the grout injection for injecting the grout into the cavity S formed between the underground structure 10 (tunnel) and the ground 17 using the grout injection apparatus 1 having the above configuration. The work will be described. First, the length to the cavity S is measured by inserting the air vent pipe 4 from the through-hole 11 into the cavity S until the tip (the other end) hits the ground 17. Then, the air vent pipe 4 is cut so that the other end of the air vent pipe 4 extends to the front of the ground 17, that is, the distance between the other end of the air vent pipe 4 and the ground 17 is about several mm. Adjust the length of 4. Then, the air vent pipe 4 is fitted into the mounting hole 21 of the plug 2, the plug 2 is attached to the mounting jig 12 of the through hole 11, and the air vent pipe is inserted from the gap between the other end of the air vent pipe 4 and the ground 17. It is confirmed that air escapes from 4 (FIG. 4).
次に、注入管３の一端側の開口３０にグラウト注入ホース１５をコネクタ１６を用いて接続し（図５）、ポンプＰを用いて前記開口３０よりグラウトを注入管３内に圧入することで、吐出口３１よりグラウトが貫通孔１１から空洞Ｓに注入される（図６）。このとき、エア抜きパイプ４からエアが抜け出ることを確認する。グラウトを注入管３に供給し、貫通孔１１から空洞Ｓに注入し続けると、エア抜きパイプ４の他端からグラウトがエア抜きパイプ４に浸入し、エア抜きパイプ４の一端からグラウトが漏れ出すようになる（図７）。エア抜きパイプ４の一端からグラウトが漏れ出すと、ポンプの作動を停めて空洞Ｓへのグラウトの注入を一旦停止し、エア抜きパイプ４の一端の開口を塞ぐことが可能なキャップ７を、エア抜きパイプ４の一端に取り付ける（図８）。この状態で、再度、ポンプを作動させて空洞Ｓへのグラウトの注入を行い、圧力計（図示せず）により空洞Ｓへのグラウトの注入圧が上がるのを確認できれば、空洞Ｓにグラウトが充填されたのが確認できるので、ポンプの作動を停めて空洞Ｓへのグラウトの注入を停止する。これにより、グラウト注入作業が終了し、注入管３からグラウト注入ホース１５を取り外した後、蓋体８を取付治具１２にねじ止めにより取り付けることで、貫通孔１１を閉塞する（図９）。 Next, the grout injection hose 15 is connected to the opening 30 on one end side of the injection pipe 3 using the connector 16 (FIG. 5), and the grout is press-fitted into the injection pipe 3 from the opening 30 using the pump P. The grout is injected from the discharge port 31 into the cavity S through the through hole 11 (FIG. 6). At this time, it is confirmed that air escapes from the air vent pipe 4. When the grout is supplied to the injection pipe 3 and continuously injected into the cavity S from the through hole 11, the grout enters the air vent pipe 4 from the other end of the air vent pipe 4 and the grout leaks from one end of the air vent pipe 4. (FIG. 7). When the grout leaks from one end of the air vent pipe 4, the pump operation is stopped to stop the injection of the grout into the cavity S, and the cap 7 that can close the opening of the one end of the air vent pipe 4 is put into the air It attaches to the end of the extraction pipe 4 (FIG. 8). In this state, the pump is operated again to inject the grout into the cavity S. If it can be confirmed that the injection pressure of the grout into the cavity S is increased by a pressure gauge (not shown), the cavity S is filled with the grout. Since it can be confirmed, the pump operation is stopped and the injection of the grout into the cavity S is stopped. Thus, after the grout injection operation is completed and the grout injection hose 15 is removed from the injection tube 3, the cover 8 is attached to the attachment jig 12 by screwing to close the through hole 11 (FIG. 9).
上記構成のグラウト注入装置１によると、プラグ２に注入管３及びエア抜きパイプ４が並列に取り付けられているので、プラグ２を貫通孔１１の取付治具１２に取り付ければ、注入管３及びエア抜きパイプ４を設置できる。よって、エア抜きパイプ４の取り付けに要する労力や時間の無駄をなくすことができる。その上、空洞Ｓの長さに応じてエア抜きパイプ４の長さを調節し、エア抜きパイプ４の先端（他端）が地下構造物１０（トンネル）と地盤との間の空洞Ｓを地盤手前まで延びるので、グラウト注入時に確実にエア抜きを行うことができる。 According to the grout injection device 1 having the above-described configuration, the injection tube 3 and the air vent pipe 4 are attached to the plug 2 in parallel. Therefore, if the plug 2 is attached to the attachment jig 12 of the through hole 11, the injection tube 3 and the air The extraction pipe 4 can be installed. Therefore, waste of labor and time required for attaching the air bleeding pipe 4 can be eliminated. In addition, the length of the air vent pipe 4 is adjusted according to the length of the cavity S, and the tip (the other end) of the air vent pipe 4 passes through the cavity S between the underground structure 10 (tunnel) and the ground. Since it extends to the near side, air can be reliably vented at the time of grout injection.
以上、本発明の一実施形態について説明したが、本発明の具体的な態様は、上記実施形態に限定されるものではない。例えば、上記実施形態では、エア抜きパイプ４がプラグ２の取付孔２２に嵌め込みにより固定されているが、エア抜きパイプ４をプラグ２の取付孔２２にスライド可能に取り付け、エア抜きパイプ４をスライドさせることで、エア抜きパイプ４の他端を地盤との間隔が数ｍｍ程度となる手前位置に調節するようにしてもよい。 As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment. For example, in the above embodiment, the air vent pipe 4 is fixed by fitting into the mounting hole 22 of the plug 2, but the air vent pipe 4 is slidably attached to the mounting hole 22 of the plug 2, and the air vent pipe 4 is slid. By doing so, the other end of the air bleeding pipe 4 may be adjusted to a near position where the distance from the ground is about several mm.
また、上記実施形態では、プラグ２の外周面をねじ加工することにより貫通孔１１の取付治具１２にプラグを取付可能としているが、プラグ２の取付治具１２への取付方法は特に限定されるものではなく、種々の方法により取り付けることができる。また、注入管３やエア抜きパイプ４、プラグ２の径は、貫通孔１１の大きさに応じて適宜変更できる。 Moreover, in the said embodiment, although a plug can be attached to the attachment jig | tool 12 of the through-hole 11 by screwing the outer peripheral surface of the plug 2, the attachment method to the attachment jig | tool 12 of the plug 2 is specifically limited. It can be attached by various methods. In addition, the diameters of the injection tube 3, the air vent pipe 4, and the plug 2 can be appropriately changed according to the size of the through hole 11.
また、上記実施形態では、逆止弁５としてゴムチューブを用いているが、吐出口３１にグラウトが逆流するのを阻止できるのであれば、種々の態様のものを用いることができる。 Moreover, in the said embodiment, although the rubber tube is used as the non-return valve 5, the thing of a various aspect can be used if it can prevent that a grout flows backward to the discharge outlet 31. FIG.
１ グラウト注入装置
２ プラグ
３ 注入管
４ エア抜きパイプ
５ 逆止弁
７ キャップ
１０ 地下構造物
３１ 吐出口
４１ 接続管
４２ 本管
DESCRIPTION OF SYMBOLS 1 Grout injection apparatus 2 Plug 3 Injection pipe 4 Air bleeding pipe 5 Check valve 7 Cap 10 Underground structure 31 Discharge port 41 Connection pipe 42 Main pipe
Claims (5)
前記取付治具に取り付け可能なプラグと、
一端及び他端がそれぞれ前記プラグの一方面側及び他方面側に位置するように前記プラグに取り付けられ、前記一端にグラウト注入ホースが取り付けられるとともに前記他端側にグラウトを吐出する吐出口を有する注入管と、
一端及び他端がそれぞれ前記プラグの一方面側及び他方面側に位置するように前記プラグに前記注入管と並列に取り付けられ、前記他端が地下構造物と地盤との間の空洞を地盤手前まで延びるエア抜きパイプと、を備え、
前記取付治具は、貫通孔に嵌め込まれる円筒状部を備え、前記円筒状部の内周面には雌ねじが形成されており、
前記プラグは、前記円筒状部の内周面の雌ねじと螺合する雄ねじが外周面に形成されているグラウト注入装置。 A mounting jig fixed to a through-hole penetrating the wall of the underground structure ;
A plug attachable to the mounting jig ;
The plug is attached to the plug so that one end and the other end are located on one side and the other side of the plug, respectively, and a grout injection hose is attached to the one end and a discharge port for discharging grout to the other end. An injection tube;
The plug is attached in parallel to the injection pipe so that one end and the other end are located on one side and the other side of the plug, respectively, and the other end passes through a cavity between the underground structure and the ground. and an air vent pipe that extends up to,
The mounting jig includes a cylindrical portion that is fitted into a through hole, and an internal thread is formed on an inner peripheral surface of the cylindrical portion,
The plug is a grout injection device in which a male screw that engages with a female screw on the inner peripheral surface of the cylindrical portion is formed on the outer peripheral surface .
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| CN110094216B (en) * | 2019-05-31 | 2024-05-03 | 中铁第四勘察设计院集团有限公司 | Separated tunnel stratum compensation grouting system |
| CN111058864A (en) * | 2019-11-29 | 2020-04-24 | 中铁九局集团第四工程有限公司 | Tunnel vault lining rear cavity high-pressure grouting auxiliary device |
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| JP2002256543A (en) * | 2001-02-27 | 2002-09-11 | Shimizu Corp | Grout injection apparatus |
| JP3622013B2 (en) * | 2001-06-07 | 2005-02-23 | 強化土エンジニヤリング株式会社 | Ground injection method for grout using multiple unit pumps. |
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