JP4203567B2 - Lock bolt pressurization / expansion method - Google Patents

Lock bolt pressurization / expansion method Download PDF

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JP4203567B2
JP4203567B2 JP2003349084A JP2003349084A JP4203567B2 JP 4203567 B2 JP4203567 B2 JP 4203567B2 JP 2003349084 A JP2003349084 A JP 2003349084A JP 2003349084 A JP2003349084 A JP 2003349084A JP 4203567 B2 JP4203567 B2 JP 4203567B2
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lock bolt
pressurizing
pressurized fluid
pressure water
fluid supply
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JP2005113504A (en
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健二 大嶋
哲男 伊藤
寛之 田名瀬
武文 仲子
剛之 吉田
茂雄 松原
敏晴 橘高
三鶴 西畑
健二郎 浅井
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Nippon Steel Nisshin Co Ltd
Central Nippon Highway Engineering Nagoya Co Ltd
Nippon Steel Nisshin Pipe Co Ltd
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Central Nippon Highway Engineering Nagoya Co Ltd
Nisshin Steel Co Ltd
Nisshin Kokan Co Ltd
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Description

本発明は、岩盤に設けた孔内に挿入した鋼管膨張型ロックボルトの複数を、効率良くまとめて加圧・膨張させる方法に関する。   The present invention relates to a method for efficiently pressurizing and expanding a plurality of steel pipe expansion type lock bolts inserted into holes provided in a rock mass.

近年、崩落し易いまたは湧水が多い岩盤や地盤を早期に安定化させるために、従来の棒状ロックボルトに代わって管状の鋼管膨張型ロックボルトが使用されるようになった。
例えば特許文献１にみられるように、長手方向に膨張用凹部を有し、先端部が閉じられ、後端部に加圧流体圧入用スリーブが被せられた鋼管製のロックボルトを岩盤に設けた孔内に挿入し、スリーブの側面に穿った加圧流体圧入孔から加圧流体を圧入し、鋼管を加圧・膨張させて孔と密着させることによって岩盤や地盤を鋼管で固結しようとするものである。
そして、鋼管膨張型ロックボルトを膨張させるための装置に関しても特許文献１の他に種々のものが提案され、使用されている。 In recent years, tubular steel pipe expansion type lock bolts have come to be used in place of conventional bar-shaped rock bolts in order to quickly stabilize rocks and grounds that tend to collapse or have a lot of spring water.
For example, as seen in Patent Document 1, a rock bolt made of steel pipe having a concave portion for expansion in the longitudinal direction, a front end portion closed, and a sleeve for pressurizing fluid press-fitting on a rear end portion is provided on the rock mass. Inserting into the hole, pressurizing the pressurized fluid from the pressurized fluid injection hole made on the side of the sleeve, pressurizing and expanding the steel pipe and bringing it into close contact with the hole to try to consolidate the rock and ground with the steel pipe Is.
In addition to Patent Document 1, various devices have been proposed and used as devices for expanding a steel pipe expansion type lock bolt.

本出願人も、鋼管膨張型ロックボルトを膨張させるためのシールヘッドや、高圧水供給装置について、特許文献２，３等で提案してきた。
そして、上記特許文献２で、図１に示すように、ロックボルト加圧・膨張用シールヘッドをロックボルトに被せた個々のスリーブに嵌着させて保持し、個々のシールヘッドの流体流入口に加圧流体供給管を接続するとともに、それぞれがロックボルト加圧・膨張用シールヘッドの流体流入口に接続された複数の加圧流体供給管３を、分岐ブロック２の送水口に接続し、該分岐ブロック２に高圧水供給装置１から加圧流体を圧入して複数のロックボルトを加圧・膨張させることを提案している。 The present applicant has also proposed a seal head for inflating a steel pipe expansion type lock bolt and a high-pressure water supply device in Patent Documents 2 and 3 and the like.
In Patent Document 2, as shown in FIG. 1, the lock bolt pressurizing / expanding seal head is fitted to and held in individual sleeves placed on the lock bolts, and the fluid inlets of the individual seal heads are held. A plurality of pressurized fluid supply pipes 3 each connected to a fluid inlet of a lock bolt pressurizing / expanding seal head are connected to a water supply port of the branch block 2, It has been proposed to pressurize and expand a plurality of lock bolts by pressurizing pressurized fluid from the high-pressure water supply device 1 into the branch block 2.

特公平２−５２３８号公報Japanese Patent Publication No.2-5238 特願２００２−１７３３１８号Japanese Patent Application No. 2002-173318 特願２００３−７３３３２号Japanese Patent Application No. 2003-73332

ところで、個々のシールヘッドの流体流入口に接続した加圧流体供給管３をそれぞれ個別に分岐ブロック２の送水口に接続すると、それぞれの加圧流体供給管３は分岐ブロック２から所要の長さを必要とするために、総延長が長くなる。また加圧流体供給管３は、適宜位置に固定した分岐ブロック２から別々に枝分かれしている態様となっている。地山不良箇所に集中的にロックボルトを打設するランダムボルティングでは、分岐ブロックから延長する個々の加圧流体供給管の長さは比較的短くて済む場合も多く、特に問題にはならない。しかし、図２のような、所定の間隔でロックボルトを打設（パターンボルティング）するトンネル掘削現場にあっては、分岐ブロック２の周辺は総延長が長くなった加圧流体供給管３が入り乱れた状況となり、加圧流体供給管３の取り扱い性は、必ずしも良好とは言えない。   By the way, when the pressurized fluid supply pipes 3 connected to the fluid inlets of the individual seal heads are individually connected to the water supply ports of the branch block 2, each pressurized fluid supply pipe 3 has a required length from the branch block 2. The total length is longer. Further, the pressurized fluid supply pipe 3 is in a state where it is branched separately from the branch block 2 fixed at an appropriate position. In random bolting in which rock bolts are intensively placed in unnatural areas, the length of each pressurized fluid supply pipe extending from the branch block is often relatively short, and this is not a problem. However, in a tunnel excavation site in which lock bolts are driven (pattern bolting) at predetermined intervals as shown in FIG. It becomes a mixed situation, and the handleability of the pressurized fluid supply pipe 3 is not necessarily good.

本発明は、このような問題を解消すべく案出されたものであり、複数の鋼管膨張型ロックボルトを加圧・膨張させる際に、加圧流体供給管の総延長を短くするとともに、分岐ブロック周辺の加圧流体供給管を集約し、作業性よく加圧・膨張させる方法を提供するものである。   The present invention has been devised to solve such a problem. When pressurizing and expanding a plurality of steel pipe expansion type lock bolts, the total extension of the pressurized fluid supply pipe is shortened and branched. The present invention provides a method of concentrating the pressurized fluid supply pipes around the block and pressurizing and expanding them with good workability.

本発明のロックボルト加圧・膨張方法は、その目的を達成するため、高圧水供給装置に接続された１本の加圧流体供給管に、複数のロックボルト加圧・膨張用シールヘッドのそれぞれの直近位置で分岐加圧流体供給管を接続するとともに、当該各分岐加圧流体供給管を、それぞれ高圧水用三方弁を介して個々のロックボルト加圧・膨張用シールヘッドに接続し、前記高圧水供給装置から前記１本の加圧流体供給管に加圧流体を圧送することにより、複数のロックボルト加圧・膨張用シールヘッドに加圧流体を供給して、ロックボルト加圧・膨張用シールヘッドが被着された複数のロックボルトをまとめて加圧・膨張させることを特徴とする。   In order to achieve the object of the lock bolt pressurizing / expanding method of the present invention, each of a plurality of lock bolt pressurizing / expanding seal heads is connected to one pressurized fluid supply pipe connected to a high pressure water supply device. Branch pressurized fluid supply pipes are connected at the nearest positions, and each branch pressurized fluid supply pipe is connected to an individual lock bolt pressurizing / expanding seal head via a three-way valve for high pressure water, By feeding pressurized fluid from the high-pressure water supply device to the one pressurized fluid supply pipe, the pressurized fluid is supplied to the plurality of lock bolt pressurizing / expanding seal heads, and the lock bolt pressurizing / expanding. A plurality of lock bolts to which a sealing head is attached are collectively pressurized and expanded.

また、高圧水供給装置に接続された分岐ブロックに２本の加圧流体供給管が接続されているとともに、該加圧流体供給管のそれぞれの先端にそれぞれ高圧水用三方弁を介して接続されたロックボルト加圧・膨張用シールヘッドを有する高圧水供給ユニットを使用して適宜間隔で打設された複数のロックボルトを加圧・膨張させる際に、１個のロックボルト加圧・膨張用シールヘッドに高圧水を供給して１本のロックボルトを加圧・膨張させつつ、先に加圧・膨張作業が完了した１本のロックボルトからロックボルト加圧・膨張用シールヘッドを取り外し、取り外したロックボルト加圧・膨張用シールヘッドを未加圧の別の１本のロックボルトに付け替えて、適宜間隔で打設された複数のロックボルトに順次高圧水を供給するようにしてもよい。
さらに、分岐ブロックに接続された２本の加圧流体供給管のそれぞれに複数の（例えば２本の）分岐加圧流体供給管を接続し、それぞれにロックボルト加圧・膨張用シールヘッドを連結した高圧水供給ユニットを使用して、例えば２個ずつのシールヘッドに高圧水を供給し、複数のロックボルトを例えば２個ずつ順次加圧・膨張するようにしてもよい。 In addition, two pressurized fluid supply pipes are connected to the branch block connected to the high-pressure water supply device, and are connected to respective tips of the pressurized fluid supply pipes via high-pressure water three-way valves, respectively. When pressurizing / expanding a plurality of lock bolts placed at appropriate intervals using a high-pressure water supply unit having a seal head for pressurizing / expanding lock bolts, pressurize / expand one lock bolt. While supplying high pressure water to the seal head to pressurize and expand one lock bolt, remove the lock head for pressurizing and expanding the lock bolt from the one lock bolt that has been previously pressurized and expanded, The removed lock bolt pressurizing / expanding seal head may be replaced with another non-pressurized lock bolt, and high pressure water may be sequentially supplied to a plurality of lock bolts placed at appropriate intervals.
Further, a plurality of (for example, two) branch pressurized fluid supply pipes are connected to each of the two pressurized fluid supply pipes connected to the branch block, and a lock bolt pressurizing / expansion seal head is connected to each. The high pressure water supply unit may be used to supply high pressure water to, for example, two seal heads, and pressurize and expand a plurality of lock bolts, for example, two by two.

本発明によれば、複数のロックボルトを加圧・膨張させようとする際に、１本の加圧流体供給管から個々のロックボルト加圧・膨張用シールヘッドの直近位置で分岐された分岐加圧流体供給管を個々のシールヘッドに接続させているので、加圧流体供給管の総延長は短くなる（図３参照）。また、図４に見られるように、現場での加圧流体供給管の配置状況が簡素化されて、全体の作業が行いやすくなる。   According to the present invention, when trying to pressurize and expand a plurality of lock bolts, a branch branched from a single pressurized fluid supply pipe at a position closest to the individual lock bolt pressurizing / expanding seal head Since the pressurized fluid supply pipe is connected to each seal head, the total extension of the pressurized fluid supply pipe is shortened (see FIG. 3). Further, as shown in FIG. 4, the arrangement state of the pressurized fluid supply pipe at the site is simplified, and the entire operation is facilitated.

また、高圧水供給装置に接続された分岐ブロックに２本の加圧流体供給管を接続し、それぞれの加圧流体供給管先端に高圧水用三方弁を介してロックボルト加圧・膨張用シールヘッドを接続しているので、高圧水用三方弁の切換えにより、１本のロックボルトを加圧・膨張させているときに次のロックボルトにシールヘッドを被着する等の準備作業を行って、２個のロックボルト加圧・膨張用シールヘッドを交互に使用して複数のロックボルトを１本ずつ順次加圧・膨張させることができ、加圧高圧水供給装置の容量が比較的小さくても、全体として効率的に、加圧・膨張作業を行うことができる（図５，６参照）。
さらに、分岐ブロックに接続された２本の加圧流体供給管にそれぞれ複数の分岐加圧流体供給管を接続し、それぞれの分岐加圧流体供給管の先端にロックボルト加圧・膨張用シールヘッドを接続し、１本の加圧流体供給管につながる複数のロックボルト加圧・膨張用シールヘッドを順次使用して加圧・膨張作業を行うと、より効率的に岩盤補強作業を行うことができる。 In addition, two pressurized fluid supply pipes are connected to the branch block connected to the high pressure water supply device, and a lock bolt pressurization / expansion seal is connected to the end of each pressurized fluid supply pipe via a high pressure water three-way valve. Since the head is connected, preparatory work such as attaching the seal head to the next lock bolt when one lock bolt is pressurized and expanded by switching the three-way valve for high pressure water Two lock bolt pressurizing / expanding seal heads can be used alternately to pressurize and expand a plurality of lock bolts one by one, and the capacity of the pressurized high pressure water supply device is relatively small However, the pressurization / expansion operation can be efficiently performed as a whole (see FIGS. 5 and 6).
Further, a plurality of branch pressurized fluid supply pipes are connected to the two pressurized fluid supply pipes connected to the branch block, and a lock bolt pressurizing / expanding seal head is attached to the tip of each branch pressurized fluid supply pipe. Can be used to more efficiently reinforce the rock mass by using multiple lock bolt pressurization / expansion seal heads connected to one pressurized fluid supply pipe in sequence. it can.

本発明の第一の態様にあっては、高圧水供給装置１に接続された１本の加圧流体供給管３に、個々のロックボルト加圧・膨張用シールヘッド５の直近位置で複数の分岐加圧流体供給管を接続させている。そして、各々の分岐加圧流体供給管の先端を、ロックボルト加圧・膨張用シールヘッド５に附設した高圧水用三方弁６の高圧水接続口に接続している。なお、図３に示す態様にあっては、具体的には、加圧流体供給管３にＴ型継手４を接続し、その１方の開口を高圧水用三方弁６に直結させ、さらに他の開口から伸びる加圧流体供給管３には同様に高圧水用三方弁６に連結されるＴ型継手４に順次接続されている。９は、加圧・膨張が完了した後にロックボルト内の高圧を開放するための、高圧用水三方弁につながれた排水管である。   In the first aspect of the present invention, a plurality of pressurized fluid supply pipes 3 connected to the high-pressure water supply device 1 are provided with a plurality of positions at positions closest to the individual lock bolt pressurizing / expanding seal heads 5. A branch pressurized fluid supply pipe is connected. The tip of each branch pressurized fluid supply pipe is connected to a high-pressure water connection port of a high-pressure water three-way valve 6 attached to a lock bolt pressurizing / expanding seal head 5. In the embodiment shown in FIG. 3, specifically, a T-shaped joint 4 is connected to the pressurized fluid supply pipe 3, one opening thereof is directly connected to the high-pressure water three-way valve 6, and the other Similarly, the pressurized fluid supply pipe 3 extending from the opening is sequentially connected to a T-shaped joint 4 connected to the three-way valve 6 for high-pressure water. Reference numeral 9 denotes a drain pipe connected to a high pressure water three-way valve for releasing the high pressure in the lock bolt after the pressurization / expansion is completed.

なお、ロックボルト加圧・膨張用シールヘッド５としては、スリーブ８に嵌着させた時点で保持機能を発揮させるために、前記特許文献２で提案したような自己保持機能を具備したものを用いることが好ましい。
また、実際の作業では、補強しようとする岩盤，地盤にロックボルト挿入孔を削孔し、この孔に順次ロックボルト７を挿入しつつ、挿入されたロックボルト７に対して順次加圧・膨張作業が行われる。本発明は削孔に特徴はないので、以下、削孔後のロックボルト７の挿入及び加圧・膨張手順を説明する。 As the lock bolt pressurizing / expanding seal head 5, one having a self-holding function as proposed in Patent Document 2 is used in order to exert a holding function when fitted to the sleeve 8. It is preferable.
Further, in actual work, rock bolt insertion holes are drilled in the rock and ground to be reinforced, and the lock bolts 7 are sequentially inserted into the holes, and the inserted lock bolts 7 are sequentially pressurized and expanded. Work is done. Since the present invention is not characterized in drilling, the following will describe procedures for inserting the lock bolt 7 and pressurizing / expanding after drilling.

まず、高圧水用三方弁６を閉に、すなわち分岐加圧流体供給管とロックボルト加圧・膨張用シールヘッド５の流体流入口を遮断した状態で、削孔に挿入したロックボルト７（例えば図３における５本中の右端）のスリーブ８に、ロックボルト加圧・膨張用シールヘッド５を嵌着させて保持した後、高圧水用三方弁６を開にして、高圧水供給装置１からロックボルト加圧・膨張用シールヘッド５に高圧水を供給し、（図３における５本中の右端の）ロックボルト７を加圧・膨張させる。このようにして（図３中、右端から左側へ）順次ロックボルト７の削孔中への挿入、ロックボルト加圧・膨張用シールヘッド５の嵌着及び高圧水用三方弁６の開作業を繰り返し、全てのロックボルト加圧・膨張用シールヘッド５へ高圧水を供給する。   First, with the three-way valve 6 for high-pressure water closed, that is, with the branch pressurized fluid supply pipe and the fluid inlet of the lock bolt pressurizing / expanding seal head 5 shut off, the lock bolt 7 (for example, After the lock bolt pressurizing / expanding seal head 5 is fitted and held on the sleeve 8 at the right end of the five in FIG. High pressure water is supplied to the seal head 5 for locking and expanding the lock bolt, and the lock bolt 7 (at the right end of the five in FIG. 3) is pressed and expanded. In this manner (from the right end to the left side in FIG. 3), the lock bolt 7 is sequentially inserted into the drilling hole, the lock bolt pressurizing / expanding seal head 5 is fitted, and the high pressure water three-way valve 6 is opened. Repeatedly, high pressure water is supplied to all the lock bolt pressurizing / expanding seal heads 5.

各ロックボルト７に、順次開にされた高圧水用三方弁６を通じて高圧水が供給される。最終的には、各ロックボルト７の水圧がほぼ等しくなり、所定の圧力に到達した時点で高圧水供給装置１の作動が停止して、複数の（図３では５本の）ロックボルト７が加圧・膨張される。
各々の高圧水用三方弁６を操作して分岐加圧流体供給管とロックボルト加圧・膨張用シールヘッド５流体流入口との連通の遮断及び排水口の開放を行ってロックボルト７内の残圧を開放した後、ロックボルト加圧・膨張用シールヘッド５をスリーブ８から取り外す。各ロックボルト７について、順次この作業を繰り返して加圧・膨張作業を終える。一連の作業終了後、次のロックボルト（図４の左半分）の加圧・膨張作業に移る。 High pressure water is supplied to each lock bolt 7 through the three-way valve 6 for high pressure water that is sequentially opened. Eventually, the water pressures of the respective lock bolts 7 become substantially equal, and when the predetermined pressure is reached, the operation of the high-pressure water supply device 1 stops and a plurality of (five in FIG. 3) lock bolts 7 are provided. Pressurized and expanded.
Each of the three-way valves 6 for high-pressure water is operated to shut off the communication between the branch pressurized fluid supply pipe and the lock bolt pressurizing / expanding seal head 5 and the fluid inlet, and to open the drainage port. After releasing the residual pressure, the lock bolt pressurizing / expanding seal head 5 is removed from the sleeve 8. This operation is sequentially repeated for each lock bolt 7 to complete the pressurizing / expanding operation. After the end of the series of operations, the operation proceeds to the pressurizing / expanding operation of the next lock bolt (left half in FIG. 4).

次に、本発明の第二の態様について説明する。
この態様にあっては、図５に示すように、高圧水供給装置１に接続された分岐ブロック２に２本の加圧流体供給管３−１，３−２を接続し、それぞれの加圧流体供給管の先端を、ロックボルト加圧・膨張用シールヘッド５−１，５−２に附設した高圧水用三方弁６−１，６−２の高圧水供給口に接続している。 Next, the second aspect of the present invention will be described.
In this embodiment, as shown in FIG. 5, two pressurized fluid supply pipes 3-1 and 3-2 are connected to the branch block 2 connected to the high-pressure water supply device 1, and each pressurization is performed. The tip of the fluid supply pipe is connected to the high-pressure water supply ports of the high-pressure water three-way valves 6-1 and 6-2 attached to the lock bolt pressurization / expansion seal heads 5-1 and 5-2.

例えば、まず、第１の加圧流体供給管３−１につながっている高圧水用三方弁６−１と第２の加圧流体供給管３−２につながっている高圧水用三方弁６−２を閉に、すなわち加圧流体供給管とロックボルト加圧・膨張用シールヘッドの流体流入口を遮断するようにセットしておく。次に、第１の加圧流体供給管３−１につながっているロックボルト加圧・膨張用シールヘッド５−１を削孔中に挿入したロックボルト７−１のスリーブ８−１に取付けて、高圧水用三方弁６−１を開に、すなわち流体流入口が連通するように切換えて高圧水供給装置を作動させて高圧水をロックボルト７−１に供給し、このロックボルト７−１を加圧・膨張させる。ロックボルト７−１を加圧・膨張させている間に、次に加圧・膨張させるロックボルト７−２を削孔中に挿入するとともに、第２の加圧流体供給管３−２につながっているロックボルト加圧・膨張用シールヘッド５−２を、当該ロックボルト７−２のスリーブ８−２に取付ける。   For example, first, the high-pressure water three-way valve 6-1 connected to the first pressurized fluid supply pipe 3-1 and the high-pressure water three-way valve 6- 6 connected to the second pressurized fluid supply pipe 3-2. 2 is closed, that is, set so as to block the fluid inlet of the pressurized fluid supply pipe and the lock bolt pressurizing / expanding seal head. Next, the lock bolt pressurizing / expanding seal head 5-1 connected to the first pressurized fluid supply pipe 3-1 is attached to the sleeve 8-1 of the lock bolt 7-1 inserted into the drilling hole. The high-pressure water three-way valve 6-1 is opened, that is, the high-pressure water supply device is operated by switching so that the fluid inflow port is communicated to supply high-pressure water to the lock bolt 7-1. Is pressurized and expanded. While the lock bolt 7-1 is pressurized and expanded, the lock bolt 7-2 to be pressurized and expanded next is inserted into the drilling hole and connected to the second pressurized fluid supply pipe 3-2. The lock bolt pressurizing / expanding seal head 5-2 is attached to the sleeve 8-2 of the lock bolt 7-2.

引続いて、第２の加圧流体供給管３−２につながっている高圧水用三方弁６−２を操作して加圧流体供給管３−２とロックボルト加圧・膨張用シールヘッド５−２の流体流入口を連通させて、ロックボルト７−２の加圧・膨張を始める。そして、ロックボルト７−１の加圧・膨張が完了した時点で、第１の加圧流体供給管３−１につながっている高圧水用三方弁６−１を操作して加圧流体供給管３−１とロックボルト加圧・膨張用シールヘッド５−１の流体流入口との連通の遮断及び排水口の開放を行う。   Subsequently, the high pressure water three-way valve 6-2 connected to the second pressurized fluid supply pipe 3-2 is operated to pressurize the pressurized fluid supply pipe 3-2 and the lock head for pressurizing / expanding the lock bolt. -2 fluid communication port is connected, and pressurization / expansion of the lock bolt 7-2 is started. When the pressurization / expansion of the lock bolt 7-1 is completed, the pressurized fluid supply pipe is operated by operating the high-pressure water three-way valve 6-1 connected to the first pressurized fluid supply pipe 3-1. The communication between the 3-1 and the fluid inlet of the lock head for pressurizing / expanding the lock bolt 5-1 is shut off and the drain outlet is opened.

ロックボルト７−２を加圧・膨張させている間に、ロックボルト加圧・膨張用シールヘッド５−１をロックボルト７−１から外すとともに、次のロックボルト７−３を削孔中に挿入し、ロックボルト加圧・膨張用シールヘッド５−１を当該ロックボルト７−３に取付ける。
この一連の作業を繰り返して、複数のロックボルトを連続的に順次加圧・膨張させることができる。 While pressurizing and expanding the lock bolt 7-2, the lock bolt pressurizing / expanding seal head 5-1 is removed from the lock bolt 7-1 and the next lock bolt 7-3 is inserted into the hole. Insert the lock bolt pressurizing / expanding seal head 5-1 into the lock bolt 7-3.
By repeating this series of operations, the plurality of lock bolts can be continuously pressed and expanded sequentially.

上記のように２個のロックボルト加圧・膨張用シールヘッドを交互に付け替えるような、すなわち２本の加圧流体供給管を交互に使用するようなロックボルトの加圧・膨張方法にあっては、それぞれの加圧流体供給管に高圧用三方弁を備えたロックボルト加圧・膨張用シールヘッドを接続させると、１本のロックボルトを加圧・膨張させつつ、次のロックボルトについての準備作業を行うことができ、高圧水供給装置の休止時間を短縮できることから、全体としてロックボルト加圧・膨張作業を効率良く行うことができる。   In the lock bolt pressurization / expansion method in which two lock bolt pressurization / expansion seal heads are alternately replaced as described above, that is, two pressurization fluid supply pipes are alternately used. When a lock bolt pressurization / expansion seal head equipped with a high-pressure three-way valve is connected to each pressurized fluid supply pipe, one lock bolt is pressurized and expanded while the next lock bolt is Since the preparatory work can be performed and the downtime of the high-pressure water supply device can be shortened, the lock bolt pressurizing / expanding work can be efficiently performed as a whole.

なお、上記のように２本の加圧流体供給管を交互に使用するようなロックボルトの加圧・膨張方法にあっては、それぞれの加圧流体供給管に第１の態様のように複数の（例えば２本の）分岐加圧流体供給管を接続するとともに、それぞれの分岐加圧流体供給管先端に高圧水用三方弁を備えたロックボルト加圧・膨張用シールヘッドを接続させることもできる。このようにすると、複数の（例えば２個の）ロックボルトをまとめて加圧・膨張させつつ、次の例えば２本のロックボルトについての準備作業を行うようにすることができ、全体としてロックボルト加圧・膨張作業を極めてよい作業効率で行うことができる。   In addition, in the pressurizing / expanding method of the lock bolt in which the two pressurized fluid supply pipes are alternately used as described above, a plurality of pressurized fluid supply pipes are provided as in the first embodiment. (For example, two) branch pressurized fluid supply pipes, and a lock bolt pressurizing / expanding seal head having a three-way valve for high-pressure water at the tip of each branch pressurized fluid supply pipe it can. In this way, a plurality of (for example, two) lock bolts can be collectively pressurized and expanded, and the next preparatory work for, for example, two lock bolts can be performed. Pressurization and expansion work can be performed with extremely good work efficiency.

以上に説明したように、本発明ロックボルト加圧・膨張方法の開発により、複数のシールヘッドを複数のスリーブに装着した後、それぞれのシールヘッド流体流入口に接続している加圧流体供給管に高圧水供給装置から高圧水を送給すれば、複数のロックボルトをまとめて加圧・膨張させることができるので、岩盤の補強作業が効率的に行える。作業現場内に加圧流体供給管が煩雑に配置されていないので、作業の邪魔にならず、作業効率は向上する。
また、本発明第２の態様の開発により、複数のロックボルトを１本ずつ（場合によっては複数本ずつ）順次加圧・膨張させることにより、容量の小さい高圧水供給装置であっても効率よくロックボルト加圧・膨張作業を行うことができ、岩盤補強作業が極めて効率的に行える。このことは、岩盤の緩みの進行抑制、ひいては岩盤の長期安定性の向上につながることになる。さらに作業時間短縮による経費節減も可能となる。 As described above, by the development of the lock bolt pressurizing / expanding method of the present invention, after the plurality of seal heads are mounted on the plurality of sleeves, the pressurized fluid supply pipes connected to the respective seal head fluid inlets If high-pressure water is fed from the high-pressure water supply device, a plurality of rock bolts can be pressurized and expanded together, so that the rock can be reinforced efficiently. Since the pressurized fluid supply pipe is not complicatedly arranged in the work site, the work efficiency is improved without interfering with the work.
In addition, by developing the second aspect of the present invention, a plurality of lock bolts can be pressed and expanded sequentially one by one (in some cases, a plurality of lock bolts) in order, so even a high-pressure water supply device with a small capacity can be efficiently used. Rock bolt pressurization and expansion work can be performed, and rock mass reinforcement work can be performed very efficiently. This leads to suppression of the progress of bedrock loosening and, consequently, improvement of the long-term stability of the bedrock. Furthermore, it is possible to reduce costs by shortening the work time.

複数のロックボルトをまとめて加圧・膨張させる従来の方法を説明する図The figure explaining the conventional method of pressurizing and expanding a plurality of lock bolts together 従来法でのトンネル掘削現場の加圧流体供給管の配置状況を説明する図Diagram explaining the arrangement of pressurized fluid supply pipes at the tunnel excavation site in the conventional method 複数のロックボルトをまとめて加圧・膨張させる本発明方法を説明する図The figure explaining the method of this invention which pressurizes and expands several lock bolts collectively. 本発明法でのトンネル掘削現場の加圧流体供給管の配置状況を説明する図The figure explaining the arrangement | positioning condition of the pressurized fluid supply pipe | tube of the tunnel excavation site by this invention method 複数のロックボルトを１本ずつ順次加圧・膨張させる方法を説明する図The figure explaining the method of pressurizing and expanding a plurality of lock bolts one by one one by one １本ずつ順次加圧・膨張させる際のトンネル掘削現場での加圧流体供給管の配置状況を説明する図The figure explaining the arrangement situation of the pressurization fluid supply pipe in the tunnel excavation site when carrying out pressurization and expansion one by one sequentially

符号の説明Explanation of symbols

１：高圧水供給装置 ２：分岐ブロック ３：加圧流体供給管
４：Ｔ型継手 ５：ロックボルト加圧・膨張用シールヘッド
６：高圧水用三方弁 ７：ロックボルト ８：スリーブ ９：排水管 1: High-pressure water supply device 2: Branch block 3: Pressurized fluid supply pipe
4: T type joint 5: Sealing head for lock bolt pressurization and expansion
6: Three-way valve for high pressure water 7: Lock bolt 8: Sleeve 9: Drain pipe

Claims (2)

高圧水供給装置に接続された１本の加圧流体供給管に、複数のロックボルト加圧・膨張用シールヘッドのそれぞれの直近位置で分岐加圧流体供給管を接続するとともに、当該各分岐加圧流体供給管を、それぞれ高圧水用三方弁を介して個々のロックボルト加圧・膨張用シールヘッドに接続し、前記高圧水供給装置から前記１本の加圧流体供給管に加圧流体を圧送することにより、複数のロックボルト加圧・膨張用シールヘッドに加圧流体を供給して、ロックボルト加圧・膨張用シールヘッドが被着された複数のロックボルトをまとめて加圧・膨張させることを特徴とするロックボルト加圧・膨張方法。   A branch pressurized fluid supply pipe is connected to a single pressurized fluid supply pipe connected to the high-pressure water supply device at a position closest to each of the plurality of lock bolt pressurizing / expanding seal heads. A pressurized fluid supply pipe is connected to each lock bolt pressurizing / expanding seal head via a three-way valve for high pressure water, and pressurized fluid is supplied from the high pressure water supply device to the one pressurized fluid supply pipe. By supplying pressure, pressurized fluid is supplied to a plurality of lock bolt pressurizing / expanding seal heads, and the plurality of lock bolts to which the lock bolt pressurizing / expanding seal heads are attached are collectively pressurized / expanded. A method for pressurizing and expanding a lock bolt. 高圧水供給装置に接続された分岐ブロックに２本の加圧流体供給管が接続されているとともに、該加圧流体供給管のそれぞれの先端にそれぞれ高圧水用三方弁を介して接続されたロックボルト加圧・膨張用シールヘッドを有する高圧水供給ユニットを使用して適宜間隔で打設された複数のロックボルトを加圧・膨張させる際に、１個のロックボルト加圧・膨張用シールヘッドに高圧水を供給して１本のロックボルトを加圧・膨張させつつ、先に加圧・膨張作業が完了した１本のロックボルトからロックボルト加圧・膨張用シールヘッドを取り外し、取り外したロックボルト加圧・膨張用シールヘッドを未加圧の別の１本のロックボルトに付け替えて、適宜間隔で打設された複数のロックボルトに順次高圧水を供給することを特徴とするロックボルト加圧・膨張方法。   Two pressurized fluid supply pipes are connected to the branch block connected to the high-pressure water supply device, and locks are connected to the respective tips of the pressurized fluid supply pipes via high-pressure water three-way valves, respectively. When pressurizing and expanding a plurality of lock bolts placed at appropriate intervals using a high pressure water supply unit having a bolt pressurizing / expanding seal head, a single lock bolt pressurizing / expanding seal head The high pressure water was supplied to pressurize and expand one lock bolt, and the lock bolt pressurization / expansion seal head was removed from the one lock bolt that had been previously pressurized and expanded. A lock characterized in that the lock bolt pressurizing / expanding seal head is replaced with another non-pressurized lock bolt, and high pressure water is sequentially supplied to a plurality of lock bolts placed at appropriate intervals. Belt pressurization and expansion method.
JP2003349084A 2003-10-08 2003-10-08 Lock bolt pressurization / expansion method Expired - Fee Related JP4203567B2 (en)

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KR101515974B1 (en) * 2013-12-31 2015-05-04 코오롱글로벌 주식회사 Joining device for rock bolt having double pipe and operating method thereof
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