JP2000129676A - Method and device for injecting grout material in ground anchor - Google Patents
Method and device for injecting grout material in ground anchorInfo
- Publication number
- JP2000129676A JP2000129676A JP10298937A JP29893798A JP2000129676A JP 2000129676 A JP2000129676 A JP 2000129676A JP 10298937 A JP10298937 A JP 10298937A JP 29893798 A JP29893798 A JP 29893798A JP 2000129676 A JP2000129676 A JP 2000129676A
- Authority
- JP
- Japan
- Prior art keywords
- grout material
- sheath tube
- tube
- hole
- grout
- 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.)
- Granted
Links
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、地盤や岩盤の補強
や安定化などを図るために使用されるグラウンドアンカ
ーの設置においてグラウト材を注入する場合に用いられ
るグラウト材注入技術に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grout material injection technique used for injecting grout material when installing a ground anchor used to reinforce or stabilize the ground or bedrock.
【０００２】[0002]
【従来の技術】従来からこの種のグラウンドアンカーと
して、削孔に挿入される合成樹脂製パイプなどからなる
シース管内にＰＣ鋼より線やＰＣ鋼棒材等から構成され
る引張材を挿通する形態のものが広く知られている。こ
の場合、シース管としては、ストレート管を用いたり、
螺旋状のコルゲート管を用いたり、定着部にコルゲート
管、自由長部にストレート管を用いたものなどが知られ
ている。ところで、シース管の全長をコルゲート管で構
成することは、その作業性や定着効果上、望ましいこと
であるが、コルゲート管は波を打っていることから、コ
ルゲート管をシース管の全長に採用すると、グラウト材
の注入作業に必要な注入手段とコルゲート管との接続部
分におけるシール作業が困難になり手間がかかるといっ
た問題があった。このため、従来のグラウンドアンカー
において、シース管の全長をコルゲート管で構成する場
合には、例えばシース管内に引張材と共にグラウト材を
供給するための内部注入ホース及び外部注入ホースを同
時に挿入するといった技術手段が採られていた（特公平
５−７９７６８号公報）。2. Description of the Related Art Conventionally, as a ground anchor of this type, a form in which a tensile member made of a PC steel stranded wire or a PC steel bar is inserted into a sheath pipe made of a synthetic resin pipe or the like inserted into a drilled hole. Are widely known. In this case, a straight tube may be used as the sheath tube,
A spiral corrugated tube, a corrugated tube in a fixing portion, and a straight tube in a free length portion are known. By the way, it is desirable to form the entire length of the sheath tube with a corrugated tube in terms of its workability and fixing effect.However, since the corrugated tube is waving, if the corrugated tube is adopted as the entire length of the sheath tube, However, there has been a problem that the sealing work at the connecting portion between the injection means necessary for the grout material injection operation and the corrugated pipe becomes difficult and it takes time. For this reason, in a conventional ground anchor, when the entire length of the sheath tube is constituted by a corrugated tube, for example, a technique of simultaneously inserting an internal injection hose and an external injection hose for supplying a grout material together with a tensile material into the sheath tube. Means were taken (Japanese Patent Publication No. 5-79768).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
シース管内に引張材と共にグラウト材を供給するための
内部注入ホース及び外部注入ホースを同時に挿入する技
術手段によると、それらのグラウト材の注入ホースを挿
入するスペースがとられるため、その分、シース管や削
孔の径も大きくなることから、削孔費の上昇やグラウト
材の注入量の増大を招きコストアップにつながるといっ
た問題があった。本発明は、このような事情に鑑みてな
されたものであり、シース管の全長をコルゲート管によ
り構成するとともに、そのコルゲート管の口元側とグラ
ウト材の注入手段との接続部におけるシール問題を解決
して、簡便な作業により容易に装着することができ、し
かも従来のようにシース管内にグラウト材の注入ホース
を挿入する必要のないグラウンドアンカーのグラウト材
注入技術を提供することを目的とするものである。However, according to the conventional technical means for simultaneously inserting the inner injection hose and the outer injection hose for supplying the grout material together with the tension material into the conventional sheath tube, the grout material injection hose is required to be used. Since the space for insertion is large, the diameter of the sheath tube and the drilling hole is correspondingly increased, so that there is a problem that the drilling cost increases and the amount of grout material injected increases, leading to an increase in cost. The present invention has been made in view of such circumstances, and solves a sealing problem at a connecting portion between a mouth side of the corrugated tube and a grout material injection means while forming the entire length of the sheath tube with a corrugated tube. The object of the present invention is to provide a grout material injection technique for a ground anchor which can be easily mounted by a simple operation and does not require the insertion of a grout material injection hose into a sheath tube as in the related art. It is.
【０００４】[0004]
【課題を解決するための手段】前記課題を達成するた
め、請求項１及び請求項３の発明においては、引張材が
挿入されるシース管をコルゲート管で構成し、そのコル
ゲート管の口元側端部の螺旋状部に挿通孔を備えた接続
用部材を螺合するとともに、該接続用部材の挿通孔に対
してグラウト材を圧送するグラウト材供給管を進退可能
に挿通し、さらにそのグラウト材供給管に該グラウト材
供給管の後退時に前記接続用部材と接合してシース管の
内外を遮断する閉塞部材を設け、前記グラウト材供給管
を前進させて前記接続用部材と閉塞部材とを離間させた
状態でシース管内へグラウト材を注入し、このグラウト
材によってシース管内が満たされ前記接続用部材の挿通
孔と閉塞部材との離間部においてグラウト材の戻りが確
認された後、前記グラウト材供給管を後退させて前記閉
塞部材を接続用部材に接合させた状態でグラウト材を加
圧供給することにより、シース管の先端部に配設した流
出孔を開いてシース管の外側の削孔との間にグラウト材
を注入するという技術手段を採用した。In order to achieve the above object, according to the first and third aspects of the present invention, the sheath tube into which the tensile member is inserted is formed of a corrugated tube, and the corrugated tube has a mouth end. A connection member having an insertion hole is screwed into the spiral portion of the portion, and a grout material supply pipe for feeding the grout material through the insertion hole of the connection member so as to be able to advance and retreat is further inserted into the grout material. The supply pipe is provided with a closing member that joins with the connection member when the grout material supply pipe retreats and shuts off the inside and outside of the sheath tube, and moves the grout material supply pipe forward to separate the connection member and the closure member. After the grout material is injected into the sheath tube in a state where the grout material is filled, the inside of the sheath tube is filled with the grout material, and it is confirmed that the grout material has returned in the space between the insertion hole of the connection member and the closing member. The grout material is pressurized and supplied in a state in which the closing member is joined to the connecting member by retracting the out material supply tube, thereby opening an outflow hole provided at the distal end portion of the sheath tube and opening the outside of the sheath tube. The technical means of injecting a grout material between the hole and the hole was adopted.
【０００５】また、請求項２及び請求項４の発明におい
ては、引張材が挿入されるシース管をコルゲート管で構
成するとともに、内部にグラウト材の注入孔を有し、前
記コルゲート管の口元側端部の螺旋状部に螺合するネジ
部に前記注入孔と外部を連通する流出路を形成した接続
用部材をグラウト材を圧送するグラウト材供給管に接続
し、その接続用部材のネジ部を前記コルゲート管の口元
側端部の螺旋状部に対して途中まで螺合して前記流出路
を介して外部に連通した状態においてシース管内へグラ
ウト材を注入し、このグラウト材によってシース管内が
満たされ前記流出路においてグラウト材の戻りが確認さ
れた後、前記接続用部材のネジ部を更に締め込んで前記
流出路を外部と遮断してグラウト材を加圧供給すること
により、シース管の先端部に配設した流出孔を開いてシ
ース管の外側の削孔との間にグラウト材を注入するとい
う技術手段を採用した。[0005] In the invention according to claims 2 and 4, the sheath tube into which the tensile member is inserted is formed of a corrugated tube, and has a grout material injection hole therein, and the mouth side of the corrugated tube. A connection member, in which an outflow path communicating the injection hole with the outside is formed in a screw portion screwed into a spiral portion at an end, is connected to a grout material supply pipe for feeding grout material, and the screw portion of the connection member is connected. The grout material is injected into the sheath tube in a state where it is screwed halfway into the spiral portion at the mouth end of the corrugated tube and communicates with the outside through the outflow passage, and the inside of the sheath tube is filled with the grout material. After the filling is confirmed and the return of the grout material is confirmed in the outflow passage, the screw portion of the connection member is further tightened to shut off the outflow passage from the outside and pressurize the grout material to supply the sheath tube. Employing the technical means of injecting the grout between the drilling of the outer sheath tube open outflow hole which is arranged at the distal end portion.
【０００６】以上のように、本発明においては、前記コ
ルゲート管の口元側端部の螺旋状部を利用してグラウト
材の供給側に接続された接続用部材を螺合するという技
術手段を採用することによりコルゲート管との接続部に
おけるシール問題を解決するとともに、その接続部にお
いて、グラウト材の注入によってシース管内が満たされ
た場合に上がってくるグラウト材の戻りを確認した後
に、接続部を密封してグラウト材を加圧供給することに
よりシース管の先端部に配設した流出孔を開いてシース
管の外側の削孔との間にグラウト材を供給するという技
術手段を採用したものである。そして、これにより全長
がコルゲート管からなるシース管自体をグラウト材の注
入管として使用し得るように改良したものである。As described above, the present invention employs a technical means of screwing a connection member connected to a grout material supply side using a spiral portion at the mouth end of the corrugated pipe. This solves the sealing problem at the connection with the corrugated pipe, and at that connection, after confirming the return of the grout material that comes up when the inside of the sheath pipe is filled by the injection of the grout material, the connection is removed. A technique is adopted in which the grout material is sealed and supplied by pressurizing the grout material to open an outflow hole arranged at the distal end of the sheath tube and supply the grout material to a hole drilled outside the sheath tube. is there. Thus, the sheath tube having a corrugated tube in its entire length is improved so that it can be used as a grout material injection tube.
【０００７】[0007]
【発明の実施の形態】本発明は、削孔内に挿入されるシ
ース管の全長がコルゲート管で形成され、少なくともそ
の口元側端部が螺旋状に形成されているとともに、その
シース管の先端部にグラウト材の加圧供給によって開く
流出孔を備えたものであれば広く適用が可能である。す
なわち、シース管の内部に配設される引張材やグラウト
材の具体的な種類によって適用が左右されるものではな
い。また、前記接続用部材の具体的構成に関しては、以
下に例示するように種々のものが可能である。BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a sheath tube to be inserted into a hole is formed by a corrugated tube, and at least a mouth end thereof is formed in a spiral shape. As long as the portion has an outflow hole opened by pressurized supply of the grout material, it can be widely applied. That is, the application does not depend on the specific types of the tension member and the grout member disposed inside the sheath tube. As for the specific configuration of the connection member, various configurations are possible as exemplified below.
【０００８】[0008]
【実施例】以下、図面を用いて本発明の実施例に関して
説明する。図１は本発明の適用対象であるグラウンドア
ンカーの設置状態を例示した縦断面図である。図中、１
はグラウンドアンカー全体を示したもので、地盤や岩盤
に形成される削孔２内に挿入される。削孔２の上部の構
造物３上には支圧プレート４が設置され、その支圧プレ
ート４上に頭部支持用の球面ワッシャを介してアンカー
ヘッド５が載置されるとともに、そのアンカーヘッド５
に対してＰＣ鋼より線等からなる適宜数の引張材６の上
端部が定着クサビを用いて固定される。また、引張材６
は全長がコルゲート管からなるシース管７内に挿入され
グラウト材により定着される。図示のように、シース管
７の先端部には先端キャップ８が取付けられており、そ
の先端キャップ８にゴム製スリーブ９により塞がれた流
出孔が１個又は複数個形成されている。しかして、シー
ス管７内にグラウト材を供給して内部がグラウト材によ
り満たされると、更なるグラウト材の供給によりシース
管７内が加圧され、前記ゴム製スリーブ９が外側へ変形
して流出孔が開いてグラウト材が外部へ流出し、シース
管７と削孔２との間隙部に注入されることになる。すな
わち、これによってシース管７の内外にグラウト材が注
入されることになる。なお、引張材６の上方部にはアン
ボンドシース１０により被覆された自由長部が形成され
ている。また、引張材６の上端を支持した前記アンカー
ヘッド５の部分は防錆カバー１１で被われ、その防錆カ
バー１１内に防錆剤を充填して保護を図っている。図
中、１２はそれぞれの引張材６の先端部を嵌入して支持
する先端支持部材である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view illustrating an installation state of a ground anchor to which the present invention is applied. In the figure, 1
Denotes an entire ground anchor, which is inserted into a borehole 2 formed in the ground or rock. A bearing plate 4 is installed on the structure 3 above the drilled hole 2, and an anchor head 5 is placed on the bearing plate 4 via a spherical washer for supporting the head, and the anchor head 5 is placed on the bearing plate 4. 5
On the other hand, the upper end portions of an appropriate number of tensile members 6 made of PC steel strands or the like are fixed using fixing wedges. In addition, tensile material 6
Is inserted into a sheath tube 7 made of a corrugated tube and fixed by a grout material. As shown in the figure, a distal end cap 8 is attached to the distal end of the sheath tube 7, and one or more outflow holes closed by a rubber sleeve 9 are formed in the distal end cap 8. When the grout material is supplied into the sheath tube 7 and the inside is filled with the grout material, the inside of the sheath tube 7 is pressurized by the further supply of the grout material, and the rubber sleeve 9 is deformed outward. The outflow hole is opened, and the grout material flows out and is injected into the gap between the sheath tube 7 and the hole 2. That is, the grout material is injected into and out of the sheath tube 7 by this. Note that a free length portion covered with the unbonded sheath 10 is formed above the tensile member 6. Further, a portion of the anchor head 5 supporting the upper end of the tensile member 6 is covered with a rust preventive cover 11, and the rust preventive cover 11 is filled with a rust preventive agent for protection. In the figure, reference numeral 12 denotes a distal end support member that fits and supports the distal end of each tensile member 6.
【０００９】次に、本発明の特徴部分であるコルゲート
管からなるシース管７の上端部とグラウト材の供給側と
の接続部分に関する実施例について順次説明する。図２
はその接続部分に関する第１実施例を示した部分拡大断
面図である。図中、１３はコルゲート管からなる前記シ
ース管７の口元側端部の螺旋状部に螺合可能に構成され
た接続用部材で、その内部に形成された挿通孔１４を介
してグラウト材を圧送するグラウト材供給管１５が進退
可能に挿通されている。なお、本実施例の挿通孔１４は
テーパ状に形成されている。前記グラウト材供給管１５
の端部には、該グラウト材供給管１５の後退時に前記挿
通孔１４のテーパ状の内面と接合してシース管７の内外
を遮断する閉塞部材１６が設けられている。図中、１７
は閉塞部材１６に形成されたグラウト材の注入孔であ
る。Next, embodiments relating to a connecting portion between an upper end portion of a sheath tube 7 composed of a corrugated tube and a supply side of a grout material, which is a characteristic portion of the present invention, will be sequentially described. FIG.
FIG. 3 is a partially enlarged sectional view showing a first embodiment of the connection portion. In the figure, reference numeral 13 denotes a connecting member which is configured to be screwed into a spiral portion at the mouth end of the sheath tube 7 made of a corrugated tube, and through which a grout material is inserted through an insertion hole 14 formed therein. A grout material supply pipe 15 for pressure feeding is inserted so as to be able to advance and retreat. Note that the insertion hole 14 of this embodiment is formed in a tapered shape. Grout material supply pipe 15
A closing member 16 that joins with the tapered inner surface of the insertion hole 14 to block the inside and outside of the sheath tube 7 when the grout material supply tube 15 is retracted is provided at an end of the sheath tube 7. In the figure, 17
Is a grout injection hole formed in the closing member 16.
【００１０】しかして、本実施例を使用してグラウト材
を注入する場合には、先ず図３に示したように、前記グ
ラウト材供給管１５に、図示しない公知のグラウト材圧
送手段に接続されたグラウト材圧送管１８を適宜の連結
手段１９を介して接続し、閉塞部材１６を前記挿通孔１
４のテーパ状の内面から離間した前進位置にセットし
て、グラウト材の供給を開始する。これにより、閉塞部
材１６に形成された注入孔１７を介してグラウト材がシ
ース管７の内部に注入されることになるが、前記先端キ
ャップ８に形成された流出孔２０は前記ゴム製スリーブ
９によって閉じられていることからグラウト材は外部へ
流出することなくシース管７の下部から順次充填され
る。この場合、接続用部材１３の挿通孔１４と閉塞部材
１６との離間部は排気孔として機能する。そして、シー
ス管７内がグラウト材で満たされると、その戻り分がそ
れらの接続用部材１３の挿通孔１４と閉塞部材１６との
離間部を介して外部へ流出するので、グラウト材のシー
ス管７内に対する充填完了を確認することができる。When the grout material is injected using this embodiment, first, as shown in FIG. 3, the grout material supply pipe 15 is connected to a known grout material pressure feeding means (not shown). The grout material pressure feeding pipe 18 is connected via an appropriate connecting means 19 and the closing member 16 is connected to the insertion hole 1.
The grout material is started to be set at the advanced position separated from the tapered inner surface of No. 4. As a result, the grout material is injected into the inside of the sheath tube 7 through the injection hole 17 formed in the closing member 16, but the outflow hole 20 formed in the distal end cap 8 is connected to the rubber sleeve 9. The grout material is sequentially filled from the lower part of the sheath tube 7 without flowing out to the outside. In this case, the space between the insertion hole 14 of the connection member 13 and the closing member 16 functions as an exhaust hole. When the inside of the sheath tube 7 is filled with the grout material, the return portion flows out to the outside through the space between the insertion hole 14 of the connecting member 13 and the closing member 16. 7 can be confirmed to be filled.
【００１１】以上のように、前記接続用部材１３の挿通
孔１４と閉塞部材１６との離間部においてグラウト材の
シース管７内に対する充填完了が確認された場合には、
次に図４に示したように、前記グラウト供給管１５を引
上げて閉塞部材１６を後退させることにより、その閉塞
部材１６の外周面に形成したテーパ面を接続用部材１３
の挿通孔１４の内周面に形成したテーパ面に接合させ
る。これにより、シース管７の上部からのグラウト材の
流出は遮断されるので、グラウト材圧送管１８からの更
なるグラウト材の供給によりシース管７の内部は加圧さ
れるので、そのグラウト材の加圧供給によって前記ゴム
製スリーブ９が外側へ変形してシース管７の先端部に配
設した前記流出孔２０が開かれる結果、シース管７の外
側の削孔２との間にグラウト材が流出してその間隙部に
注入されることになる。As described above, when it is confirmed that the grout material has been completely filled into the sheath tube 7 at the space between the insertion hole 14 of the connection member 13 and the closing member 16,
Next, as shown in FIG. 4, by pulling up the grout supply pipe 15 and retracting the closing member 16, the tapered surface formed on the outer peripheral surface of the closing member 16 is connected to the connecting member 13.
To the tapered surface formed on the inner peripheral surface of the insertion hole 14 of FIG. As a result, the outflow of the grout material from the upper portion of the sheath tube 7 is blocked, and the inside of the sheath tube 7 is pressurized by the further supply of the grout material from the grout material pressure feeding tube 18. The rubber sleeve 9 is deformed outward by the pressurized supply to open the outflow hole 20 provided at the distal end of the sheath tube 7, and as a result, grout material is formed between the sheath tube 7 and the drilled hole 2 outside. It flows out and is injected into the gap.
【００１２】そして、シース管７と削孔２との上方の間
隙部にグラウト材が到達して、それらの間隙部に対する
グラウト材の充填完了が確認された場合には、シース管
７内のグラウト材が硬化する前に図５に示したように引
張材６を挿入する。そして、シース管７の内外に充填さ
れたグラウト材の硬化を待って、図６に示したように公
知の緊張装置２１を用いて引張材６に対する緊張作業が
行われることになる。なお、以上の説明では、シース管
７の内外に対するグラウト材の注入を実施した後に、あ
とから引張材６を挿入するという作業手順を採用した場
合に関して説明したが、図７に示したようにシース管７
を長めに形成して、そのシース管７内に予め引張材６を
挿入した状態でグラウト材を注入するという作業手順を
採用することも可能である。When the grout reaches the gap above the sheath tube 7 and the hole 2 and it is confirmed that the grout is completely filled in the gap, the grout in the sheath tube 7 is checked. Before the material hardens, the tensile material 6 is inserted as shown in FIG. Then, after the grout material filled inside and outside of the sheath tube 7 is hardened, the tensioning operation on the tension member 6 is performed using the known tensioning device 21 as shown in FIG. In the above description, the case where the grout material is injected into the inside and the outside of the sheath tube 7 and then the tensile material 6 is inserted later has been described. However, as shown in FIG. Tube 7
It is also possible to adopt a work procedure in which the grout material is injected into the sheath tube 7 in a state where the tension material 6 is inserted in advance in the sheath tube 7.
【００１３】図８〜図１０は前記シース管７の上端部と
グラウト材の供給側との接続部分に関する他の実施例を
示した部分拡大断面図である。図８に示した第２実施例
では、シース管７の口元側端部の螺旋状部に螺合可能に
構成された接続用部材２２とグラウト材供給管１５の端
部に設けられた閉塞部材２３との接合構造として、接続
用部材２２の挿通孔２４の途中から段部２５を介して直
径を拡大した拡径凹部２６を形成し、グラウト材供給管
１５の後退時に閉塞部材２３を拡径凹部２６へ嵌入して
段部２５と閉塞部材２３との接合面によりグラウト材の
流出を遮断するという構成を採用したものである。同様
に、図９に示した第３実施例では、接続用部材２７と閉
塞部材２８との接合構造として、グラウト材供給管１５
の後退時に接続用部材２７の挿通孔２９の途中から形成
した円弧状曲面を有する嵌合凹部３０に閉塞部材２８を
嵌合して、その凸状の円弧状曲面を前記嵌合凹部３０の
円弧状曲面に接合することによりグラウト材の流出を遮
断するという構成を採用したものである。なお、図１０
に示した第４実施例は、第３実施例の変形例で、前記接
続用部材２７の挿通孔２９の途中から形成した円弧状曲
面を有する嵌合凹部３０を省略して、グラウト材供給管
１５の後退時には接続用部材２７の挿通孔２９の端部に
対して直接的に閉塞部材２８の凸状の円弧状曲面が接合
するように構成したものである。FIGS. 8 to 10 are partially enlarged sectional views showing another embodiment relating to a connection portion between the upper end portion of the sheath tube 7 and the grout material supply side. In the second embodiment shown in FIG. 8, a connection member 22 configured to be screwed into a spiral portion at the mouth end of the sheath tube 7 and a closing member provided at an end of the grout material supply tube 15. As a joint structure with the connection member 23, an enlarged-diameter concave portion 26 having an enlarged diameter is formed in the middle of the insertion hole 24 of the connecting member 22 via a step 25, and the closing member 23 is enlarged when the grout material supply pipe 15 is retracted. A configuration is adopted in which the grout material is fitted into the concave portion 26 and the outflow of the grout material is blocked by the joint surface between the step portion 25 and the closing member 23. Similarly, in the third embodiment shown in FIG. 9, the grout material supply pipe 15 is used as a joining structure between the connection member 27 and the closing member 28.
The closing member 28 is fitted into a fitting concave portion 30 having an arcuate curved surface formed from the middle of the insertion hole 29 of the connecting member 27 at the time of retreat, and the convex arcuate curved surface is formed into a circle of the fitting concave portion 30. The configuration is adopted in which the outflow of the grout material is blocked by joining to the arc-shaped curved surface. Note that FIG.
The fourth embodiment shown in FIG. 14 is a modification of the third embodiment, in which the fitting recess 30 having an arcuate curved surface formed in the middle of the insertion hole 29 of the connection member 27 is omitted, and the grout material supply pipe is provided. At the time of retreat, the convex arc-shaped curved surface of the closing member 28 is directly joined to the end of the insertion hole 29 of the connecting member 27.
【００１４】図１１はシース管７の口元側端部の螺旋状
部に螺合可能に構成された接続用部材に関する他の形態
の実施例を示したものである。この図１１に示した第５
実施例は、コルゲート管からなるシース管７の口元側端
部の螺旋状部に螺合可能に構成された接続用部材３１の
内部にグラウト材の注入孔３２を形成するとともに、そ
の接続用部材３１の外周面に形成したネジ部３３に前記
注入孔３２と外部を連通する流出路３４を形成した点で
特徴を有するものである。そして、本実施例の接続用部
材３１を使用する場合には、前記注入孔３２に連通させ
て形成した接続用雌ネジ部３５に図１２に示したように
グラウト材供給管３６を接続し、更に適宜の連結手段３
７を介して図示しない公知のグラウト材圧送手段に接続
されたグラウト材圧送管３８に連結して使用することに
なる。FIG. 11 shows another embodiment of the connection member which is screwable to the spiral portion at the mouth end of the sheath tube 7. As shown in FIG. The fifth shown in FIG.
In the embodiment, a grout material injection hole 32 is formed inside a connection member 31 which can be screwed into a spiral portion at the mouth side end of a sheath tube 7 made of a corrugated tube, and the connection member is formed. The present embodiment is characterized in that an outflow passage 34 for communicating the injection hole 32 with the outside is formed in a screw portion 33 formed on the outer peripheral surface of the base 31. When using the connection member 31 of the present embodiment, a grout material supply pipe 36 is connected to the connection female screw portion 35 formed in communication with the injection hole 32 as shown in FIG. Further appropriate connection means 3
It is used by being connected to a grout material feeding pipe 38 connected to a known grout material feeding means (not shown) via 7.
【００１５】しかして、本実施例を使用してグラウト材
を注入する場合には、先ず図１２に示したようにコルゲ
ート管からなる前記シース管７の口元側端部の螺旋状部
に対して接続用部材３１のネジ部３３を途中まで螺合し
て前記流出路３４を介して注入孔３２が外部に連通した
状態においてシース管７内へのグラウト材の供給を開始
する。これにより、グラウト材が注入孔３２を介してシ
ース管７の内部に注入され、前記先端キャップ８に形成
された流出孔２０は前記ゴム製スリーブ９により閉じら
れていることから外部へ流出することなくシース管７の
下部から順次充填される。この場合、前記流出路３４は
排気孔として機能する。そして、前述の実施例と同様に
シース管７内がグラウト材で満たされると、その戻り分
が前記流出路３４を介して外部へ流出するので、グラウ
ト材のシース管７内に対する充填完了を確認することが
できる。When the grout material is injected using this embodiment, first, as shown in FIG. 12, the spiral portion at the mouth end of the sheath tube 7 made of a corrugated tube is used. The supply of the grout material into the sheath tube 7 is started in a state where the screw portion 33 of the connecting member 31 is screwed halfway and the injection hole 32 communicates with the outside through the outflow passage 34. As a result, the grout material is injected into the inside of the sheath tube 7 through the injection hole 32, and the outflow hole 20 formed in the tip cap 8 is closed by the rubber sleeve 9 and flows out. Instead, it is sequentially filled from the lower part of the sheath tube 7. In this case, the outflow passage 34 functions as an exhaust hole. When the inside of the sheath tube 7 is filled with the grout material in the same manner as in the above-described embodiment, the return portion flows out to the outside through the outflow passage 34. Therefore, it is confirmed that the filling of the grout material into the sheath tube 7 is completed. can do.
【００１６】以上のように、前記流出路３４においてグ
ラウト材のシース管７内に対する充填完了が確認された
場合には、次に図１３に示したように、前記接続用部材
３１のネジ部３３を更に締め込んで流出路３４を外部と
遮断してグラウト材を加圧供給する。これにより、前記
ゴム製スリーブ９は外部へ変形してシース管７の先端部
に配設した前記流出孔２０が開かれ、前記実施例と同様
にシース管７の外側の削孔２との間にグラウト材が流出
してその間隙部に注入されることになる。なお、この場
合、前記接続用雌ネジ部３５のピッチを接続用部材３１
の外周面に形成するネジ部３３と同じピッチに形成する
ことにより、回転により接続用部材３１のみが相対的に
進退するように構成することも可能である。しかして、
シース管７と削孔２との上方の間隙部にグラウト材が到
達して、それらの間隙部に対するグラウト材の充填完了
が確認された場合には、シース管７内のグラウト材が硬
化する前に図５に示したように引張材６を挿入し、シー
ス管７の内外に充填されたグラウト材の硬化を待って、
図６に示したように公知の緊張装置２１を用いて引張材
６に対する緊張作業が行うことも前述の実施例と同様で
ある。また、以上の作業手順に替えて図７に示したよう
にシース管７を長めに形成して、そのシース管７内に予
め引張材６を挿入した状態でグラウト材を注入するとい
う作業手順を採用することも可能である。As described above, when the filling of the grout material into the sheath tube 7 is confirmed to be completed in the outflow passage 34, as shown in FIG. Is further tightened to shut off the outflow passage 34 from the outside and pressurize and supply the grout material. As a result, the rubber sleeve 9 is deformed to the outside, so that the outflow hole 20 provided at the distal end of the sheath tube 7 is opened. The grout material flows out and is injected into the gap. In this case, the pitch of the female screw part 35 for connection is adjusted by the member 31 for connection.
By forming the screw member 33 at the same pitch as that of the screw portion 33 formed on the outer peripheral surface, it is also possible to configure so that only the connecting member 31 relatively advances and retreats by rotation. Then
When the grout material reaches the gap above the sheath tube 7 and the hole 2 and it is confirmed that the grout is completely filled into the gap, the grout material in the sheath tube 7 is hardened. As shown in FIG. 5, a tensile material 6 is inserted into the sheath tube 7, and after the grout material filled inside and outside the sheath tube 7 is hardened,
As shown in FIG. 6, the tensioning operation for the tension member 6 is performed by using a known tensioning device 21 in the same manner as in the above-described embodiment. In addition, instead of the above operation procedure, an operation procedure in which the sheath tube 7 is formed longer as shown in FIG. 7 and the grout material is injected in a state where the tensile material 6 is inserted in the sheath tube 7 in advance. It is also possible to adopt.
【００１７】図１４は他の形態の第６実施例を示した部
分拡大断面図である。本実施例は、前記第１実施例の変
形例で、接続用部材３９をコルゲート管からなる前記シ
ース管７の口元側端部の螺旋状部に対して外側から螺合
するように構成したものである。なお、前述の実施例に
おいても場合に応じて外側から螺合するように変形する
ことは可能である。FIG. 14 is a partially enlarged sectional view showing a sixth embodiment of another embodiment. This embodiment is a modification of the first embodiment, in which the connecting member 39 is screwed from the outside into the spiral portion at the mouth end of the sheath tube 7 made of a corrugated tube. It is. It should be noted that, in the above-described embodiment, it is also possible to modify the screw connection from the outside according to the case.
【００１８】[0018]
【発明の効果】本発明は、その構成に基いて次の効果を
得ることができる。 （１）シース管の全長をコルゲート管で構成したので、
そのシース管の内外のグラウト材に対する定着効果が大
きく、延いては引張材の定着効果、すなわちアンカー効
果も良好である。 （２）シース管の全長をコルゲート管で構成したので、
所定長さのコルゲート管を接続して使用する場合などに
はそれらの相互間の接続作業等が簡便であり、作業性の
向上に有効である。 （３）コルゲート管の口元側端部の螺旋状部に螺合する
接続用部材の部分で、シース管の内外を簡便に連通ある
いは遮断できるように構成したので、その連通・遮断操
作によりシース管内に対するグラウト材の注入とシース
管の外側の削孔との間隙部に対するグラウト材の注入を
順次的確に実施することができる。According to the present invention, the following effects can be obtained based on the constitution. (1) Since the entire length of the sheath tube is composed of a corrugated tube,
The fixing effect on the grout material inside and outside the sheath tube is large, and the fixing effect of the tensile material, that is, the anchor effect is also good. (2) Since the entire length of the sheath tube is composed of a corrugated tube,
In the case where corrugated pipes of a predetermined length are connected and used, for example, the connecting work between them is simple and effective in improving workability. (3) The portion of the connecting member that is screwed into the spiral portion at the mouth end of the corrugated tube is configured so that the inside and outside of the sheath tube can be easily communicated or cut off. The grout material can be sequentially and accurately injected into the gap between the grout material and the hole drilled outside the sheath tube.
【図１】 本発明の適用対象であるグラウンドアンカー
の設置状態を例示した縦断面図である。FIG. 1 is a longitudinal sectional view illustrating an installation state of a ground anchor to which the present invention is applied.
【図２】 本発明の第１実施例を示した部分拡大断面図
である。FIG. 2 is a partially enlarged sectional view showing a first embodiment of the present invention.
【図３】 第１実施例によるシース管内に対するグラウ
ト材の注入作業を示した作業説明図である。FIG. 3 is an operation explanatory view showing an operation of injecting a grout material into a sheath tube according to the first embodiment.
【図４】 同第１実施例によるシース管の外側の削孔と
の間隙部に対するグラウト材の注入作業を示した作業説
明図である。FIG. 4 is an operation explanatory view showing an operation of injecting a grout material into a gap between the sheath tube and a hole drilled outside according to the first embodiment.
【図５】 引張材のシース管内への挿入作業を示した作
業説明図である。FIG. 5 is an operation explanatory view showing an operation of inserting a tension member into a sheath tube.
【図６】 引張材に対する緊張作業を示した作業説明図
である。FIG. 6 is an operation explanatory view showing a tensioning operation for a tension member.
【図７】 他の形態のグラウト材の注入作業を示した作
業説明図である。FIG. 7 is a work explanatory view showing a grout material injection work of another embodiment.
【図８】 本発明の第２実施例を示した部分拡大断面図
である。FIG. 8 is a partially enlarged sectional view showing a second embodiment of the present invention.
【図９】 本発明の第３実施例を示した部分拡大断面図
である。FIG. 9 is a partially enlarged sectional view showing a third embodiment of the present invention.
【図１０】 本発明の第４実施例を示した部分拡大断面
図である。FIG. 10 is a partially enlarged sectional view showing a fourth embodiment of the present invention.
【図１１】 本発明の第５実施例を示した部分拡大断面
図である。FIG. 11 is a partially enlarged sectional view showing a fifth embodiment of the present invention.
【図１２】 第５実施例によるシース管内に対するグラ
ウト材の注入作業を示した作業説明図である。FIG. 12 is an operation explanatory view showing an operation of injecting a grout material into a sheath tube according to a fifth embodiment.
【図１３】 同第５実施例によるシース管の外側の削孔
との間隙部に対するグラウト材の注入作業を示した作業
説明図である。FIG. 13 is an operation explanatory view showing an operation of injecting a grout material into a gap between the sheath tube and a hole drilled outside the sheath tube according to the fifth embodiment.
【図１４】 本発明の第６実施例を示した部分拡大断面
図である。FIG. 14 is a partially enlarged sectional view showing a sixth embodiment of the present invention.
１…グラウンドアンカー、２…削孔、３…構造物、４…
支圧プレート、５…アンカーヘッド、６…引張材、７…
シース管、８…先端キャップ、９…ゴム製スリーブ、１
０…アンボンドシース、１１…防錆カバー、１２…先端
支持部材、１３…接続用部材、１４…挿通孔、１５…グ
ラウト材供給管、１６…閉塞部材、１７…注入孔、１８
…グラウト材圧送管、１９…連結手段、２０…流出孔、
２１…緊張装置、２２…接続用部材、２３…閉塞部材、
２４…挿通孔、２５…段部、２６…拡径凹部、２７…接
続用部材、２８…閉塞部材、２９…挿通孔、３０…嵌合
凹部、３１…接続用部材、３２…注入孔、３３…ネジ
部、３４…流出路、３５…接続用雌ネジ部、３６…グラ
ウト材供給管、３７…連結手段、３８…グラウト材圧送
管、３９…接続用部材1 ... ground anchor, 2 ... drilling, 3 ... structure, 4 ...
Bearing plate, 5 ... Anchor head, 6 ... Tension material, 7 ...
Sheath tube, 8: tip cap, 9: rubber sleeve, 1
0: unbonded sheath, 11: rust prevention cover, 12: tip support member, 13: connecting member, 14: insertion hole, 15: grout material supply pipe, 16: closing member, 17: injection hole, 18
... grouting material feeding pipe, 19 ... connecting means, 20 ... outlet hole,
21 ... tensioning device, 22 ... connecting member, 23 ... closing member,
Reference numeral 24: insertion hole, 25: stepped portion, 26: enlarged diameter concave portion, 27: connection member, 28: closing member, 29: insertion hole, 30: fitting concave portion, 31: connection member, 32: injection hole, 33 ... Screw part, 34 ... Outflow path, 35 ... Female screw part for connection, 36 ... Grout material supply pipe, 37 ... Connecting means, 38 ... Grout material pressure feeding pipe, 39 ... Connection member
Claims (4)
ト管で構成し、そのコルゲート管の口元側端部の螺旋状
部に挿通孔を備えた接続用部材を螺合するとともに、該
接続用部材の挿通孔に対してグラウト材を圧送するグラ
ウト材供給管を進退可能に挿通し、さらにそのグラウト
材供給管に該グラウト材供給管の後退時に前記接続用部
材と接合してシース管の内外を遮断する閉塞部材を設
け、前記グラウト材供給管を前進させて前記接続用部材
と閉塞部材とを離間させた状態でシース管内へグラウト
材を注入し、このグラウト材によってシース管内が満た
され前記接続用部材の挿通孔と閉塞部材との離間部にお
いてグラウト材の戻りが確認された後、前記グラウト材
供給管を後退させて前記閉塞部材を接続用部材に接合さ
せた状態でグラウト材を加圧供給することにより、シー
ス管の先端部に配設した流出孔を開いてシース管の外側
の削孔との間にグラウト材を注入することを特徴とする
グラウンドアンカーのグラウト材注入方法。A sheath member into which a tensile member is inserted is formed of a corrugated tube, and a connecting member having an insertion hole is screwed into a spiral portion of the mouth end of the corrugated tube, and the connecting member is connected to the sheath member. The grout material supply pipe for feeding the grout material through the insertion hole of the member is inserted into the grout material supply pipe such that the grout material supply pipe can move forward and backward. A grout material is injected into the sheath tube in a state where the grout material supply pipe is advanced and the connection member and the closure member are separated from each other, and the grout material fills the sheath tube. After the return of the grout material is confirmed at the separation portion between the insertion hole of the connecting member and the closing member, the grout material is supplied in a state where the grout material supply pipe is retracted and the closing member is joined to the connecting member. Characterized in that the grout material is injected into the ground anchor by injecting the grout material between the outer hole of the sheath tube and the outflow hole provided at the tip of the sheath tube by supplying the grout material with pressure. .
ト管で構成するとともに、内部にグラウト材の注入孔を
有し、前記コルゲート管の口元側端部の螺旋状部に螺合
するネジ部に前記注入孔と外部を連通する流出路を形成
した接続用部材をグラウト材を圧送するグラウト材供給
管に接続し、その接続用部材のネジ部を前記コルゲート
管の口元側端部の螺旋状部に対して途中まで螺合して前
記流出路を介して外部に連通した状態においてシース管
内へグラウト材を注入し、このグラウト材によってシー
ス管内が満たされ前記流出路においてグラウト材の戻り
が確認された後、前記接続用部材のネジ部を更に締め込
んで前記流出路を外部と遮断してグラウト材を加圧供給
することにより、シース管の先端部に配設した流出孔を
開いてシース管の外側の削孔との間にグラウト材を注入
することを特徴とするグラウンドアンカーのグラウト材
注入方法。2. A threaded portion in which a sheath material into which a tensile material is inserted is formed of a corrugated tube, has a grout material injection hole therein, and is screwed into a helical portion of a mouth end of the corrugated tube. A connection member having an outflow passage communicating the injection hole with the outside is connected to a grout material supply pipe for feeding grout material, and a screw portion of the connection member is formed in a spiral shape at the mouth end of the corrugated pipe. The grout material is injected into the sheath tube in a state where the grout material is screwed partway and communicated with the outside through the outflow channel, and the grout material fills the sheath tube and confirms the return of the grout material in the outflow channel. After that, the screw portion of the connection member is further tightened to shut off the outflow passage from the outside and supply the grout material under pressure, thereby opening the outflow hole provided at the distal end portion of the sheath tube to open the sheath. Outside the tube A grout material is injected into a ground anchor between the ground anchor and a ground hole.
ト管で構成するとともに、内部に挿通孔を有し、前記コ
ルゲート管の口元側端部の螺旋状部に螺合可能なネジ部
を形成した接続用部材を備え、該接続用部材の挿通孔に
対してグラウト材を圧送するグラウト材供給管を進退可
能に挿通し、さらにそのグラウト材供給管に該グラウト
材供給管の後退時に前記接続用部材と接合してシース管
の内外を遮断する閉塞部材を設け、前記グラウト材供給
管を前進させて前記接続用部材と閉塞部材とを離間させ
た状態でシース管内へグラウト材を注入し、このグラウ
ト材によってシース管内が満たされ前記接続用部材の挿
通孔と閉塞部材との離間部においてグラウト材の戻りが
確認された後、前記グラウト材供給管を後退させて前記
閉塞部材を接続用部材に接合させた状態でグラウト材を
加圧供給することにより、シース管の先端部に配設した
流出孔を開いてシース管の外側の削孔との間にグラウト
材を注入するように構成したことを特徴とするグラウン
ドアンカーのグラウト材注入装置。3. A corrugated tube for a sheath tube into which a tensile member is inserted, and a threaded portion having an insertion hole therein and capable of being screwed into a spiral portion at a mouth end of the corrugated tube. A grout material supply pipe for pressurizing the grout material into an insertion hole of the connection member so as to advance and retreat, and further connect the grout material supply pipe to the grout material supply pipe when the grout material supply pipe retreats. Provision of a closing member that joins with the member for blocking the inside and outside of the sheath tube, injects the grout material into the sheath tube in a state where the grout material supply tube is advanced and the connection member and the closing member are separated, After the inside of the sheath tube is filled with the grout material and the return of the grout material is confirmed at the space between the insertion hole of the connection member and the closing member, the grout material supply pipe is retracted to move the closing member to the connection portion. The grout material is pressurized and supplied in the state of being joined to the material, so that the outflow hole arranged at the tip of the sheath tube is opened, and the grout material is injected between the hole and the outer hole of the sheath tube. A grout material injection device for a ground anchor, characterized in that:
ト管で構成するとともに、内部にグラウト材の注入孔を
有し、前記コルゲート管の口元側端部の螺旋状部に螺合
するネジ部に前記注入孔と外部を連通する流出路を形成
した接続用部材を備え、その接続用部材のネジ部を前記
コルゲート管の口元側端部の螺旋状部に対して途中まで
螺合して前記流出路を介して外部に連通した状態におい
てシース管内へグラウト材を注入し、このグラウト材に
よってシース管内が満たされ前記流出路においてグラウ
ト材の戻りが確認された後、前記接続用部材のネジ部を
更に締め込んで前記流出路を外部と遮断してグラウト材
を加圧供給することにより、シース管の先端部に配設し
た流出孔を開いてシース管の外側の削孔との間にグラウ
ト材を注入するように構成したことを特徴とするグラウ
ンドアンカーのグラウト材注入装置。4. A threaded portion in which a sheath material into which a tensile material is inserted is formed of a corrugated tube, has a grout material injection hole therein, and is screwed into a helical portion at a mouth end of the corrugated tube. A connection member formed with an outflow passage communicating the injection hole and the outside, the screw portion of the connection member is screwed halfway into the spiral portion of the mouth end of the corrugated pipe, A grout material is injected into the sheath tube in a state where the grout material communicates with the outside via the outflow passage, and after the grout material fills the sheath tube and the grout material returns in the outflow passage, the screw portion of the connection member is formed. Is further tightened to shut off the outflow passage from the outside and pressurize and supply the grout material, thereby opening an outflow hole provided at the distal end of the sheath tube and grouting between the hole and the outer hole of the sheath tube. To inject the material A grout material injection device for a ground anchor, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29893798A JP3821589B2 (en) | 1998-10-20 | 1998-10-20 | Ground anchor grout injection method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29893798A JP3821589B2 (en) | 1998-10-20 | 1998-10-20 | Ground anchor grout injection method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000129676A true JP2000129676A (en) | 2000-05-09 |
| JP3821589B2 JP3821589B2 (en) | 2006-09-13 |
Family
ID=17866127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29893798A Expired - Fee Related JP3821589B2 (en) | 1998-10-20 | 1998-10-20 | Ground anchor grout injection method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3821589B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002242179A (en) * | 2001-02-21 | 2002-08-28 | Taisei Corp | Sheath type anchor and grout method therefor |
| JP2008223432A (en) * | 2007-03-15 | 2008-09-25 | Ohbayashi Corp | Earthquake resisting construction method of structure, earthquake-resisting reinforcement construction method of structure, construction method of structure, earthquake resisting structure of structure, tubular member, anchor and anchor installation method |
| KR100965273B1 (en) | 2009-11-04 | 2010-06-22 | 주식회사 에스지오텍 | Reinforcing methods using apparatus for reinforcing inclined plane |
| CN112176994A (en) * | 2020-08-22 | 2021-01-05 | 浙江华东工程咨询有限公司 | Prestressed anchor cable structure suitable for broken rock mass and construction method thereof |
| KR102495297B1 (en) * | 2022-02-09 | 2023-02-06 | 한아름 | Easy caulking pressure grouting system using caulking cap and Grouting reinforcement construction method using the same |
-
1998
- 1998-10-20 JP JP29893798A patent/JP3821589B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002242179A (en) * | 2001-02-21 | 2002-08-28 | Taisei Corp | Sheath type anchor and grout method therefor |
| JP4597398B2 (en) * | 2001-02-21 | 2010-12-15 | 大成建設株式会社 | Sheath type anchor and its grouting method |
| JP2008223432A (en) * | 2007-03-15 | 2008-09-25 | Ohbayashi Corp | Earthquake resisting construction method of structure, earthquake-resisting reinforcement construction method of structure, construction method of structure, earthquake resisting structure of structure, tubular member, anchor and anchor installation method |
| KR100965273B1 (en) | 2009-11-04 | 2010-06-22 | 주식회사 에스지오텍 | Reinforcing methods using apparatus for reinforcing inclined plane |
| CN112176994A (en) * | 2020-08-22 | 2021-01-05 | 浙江华东工程咨询有限公司 | Prestressed anchor cable structure suitable for broken rock mass and construction method thereof |
| CN112176994B (en) * | 2020-08-22 | 2021-09-28 | 浙江华东工程咨询有限公司 | Construction method of prestressed anchor cable structure suitable for broken rock mass |
| KR102495297B1 (en) * | 2022-02-09 | 2023-02-06 | 한아름 | Easy caulking pressure grouting system using caulking cap and Grouting reinforcement construction method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3821589B2 (en) | 2006-09-13 |
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