JPH045311A - Execution method for ground anchor - Google Patents
Execution method for ground anchorInfo
- Publication number
- JPH045311A JPH045311A JP10443590A JP10443590A JPH045311A JP H045311 A JPH045311 A JP H045311A JP 10443590 A JP10443590 A JP 10443590A JP 10443590 A JP10443590 A JP 10443590A JP H045311 A JPH045311 A JP H045311A
- Authority
- JP
- Japan
- Prior art keywords
- grout
- anchor body
- anchor
- casing
- hole
- 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
- 238000000034 method Methods 0.000 title claims description 5
- 239000011440 grout Substances 0.000 claims abstract description 31
- 238000010276 construction Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は地盤アンカーの施工法、より詳細には、傾斜
地で施工するに好適な地盤アンカーの施工法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for constructing a ground anchor, and more particularly, to a method for constructing a ground anchor suitable for construction on a slope.
傾斜地を利用し構造物を構築する場合、斜面を安定させ
るために地盤アンカーが使用される。When building structures on sloped land, ground anchors are used to stabilize the slope.
この場合は第５図のごとく斜めポーリングした削孔１内
に、アンカーロッド２の先端に連結したアンカー体３を
削孔時のケーシング４を挿通して挿入するので先端に支
圧板５を有するアンカー体３の径は、削孔１の径よりも
少なくとも３〜５Ｃ１１細径となる。従って削孔内にお
いて、重いアンカー体３は下にさがり、削孔１の中心に
位置しなくなる。この状態で注入、硬化したグラウト６
は、アンカー体２に引張力がかかると割れたりし、地下
水により錆が発生し耐久性が低下したりする。このため
にアンカー体の引張力を地盤に伝える力が十分でなくな
り、危険も伴なうという問題点があった。In this case, as shown in Fig. 5, the anchor body 3 connected to the tip of the anchor rod 2 is inserted into the diagonally polled hole 1 by passing through the casing 4 during the hole drilling, so the anchor body 3 has a bearing plate 5 at the tip. The diameter of the body 3 is at least 3 to 5C11 smaller than the diameter of the drilled hole 1. Therefore, the heavy anchor body 3 is lowered in the drilled hole and is no longer located in the center of the drilled hole 1. Grout 6 injected and hardened in this state
If tensile force is applied to the anchor body 2, it may crack, and rust may occur due to underground water, reducing durability. For this reason, there was a problem in that the force for transmitting the tensile force of the anchor body to the ground was insufficient, which also posed a danger.
従来、この問題点を解決するために、スペーサーやゴム
パッカーを用いアンカー体を引き上げていたが、機能的
に十分ではなかった。すなわち、スペーサーの場合は最
大でも削孔用ケーシングの中に納まるものであり、肝心
のアンカー体先端の支圧板が上に上りきれない。ゴムバ
ンカーもゴムの性能上、削孔の中心軸に一致させること
はむずかしかった。Conventionally, in order to solve this problem, spacers or rubber packers were used to pull up the anchor body, but these were not functionally sufficient. That is, in the case of a spacer, at most it can fit inside the casing for drilling, and the important bearing plate at the tip of the anchor body cannot rise upward. Due to the performance of rubber, it was difficult to align the rubber bunker with the center axis of the hole being drilled.
この発明は上記問題点に着目しなされたものである。そ
の目的は、斜めの削孔内であっても、グラウトの注入と
同時にアンカー体を容易正確に削孔中心に位置せしめて
地盤アンカーの施工ができ、十分な強度と高い信軌性が
得られる地盤アンカーの施工法を提案するにある。This invention has been made in view of the above-mentioned problems. The purpose of this is to make it possible to construct a ground anchor by easily and accurately positioning the anchor body in the center of the hole at the same time as grout injection, even in an oblique hole, and to obtain sufficient strength and high reliability. This article proposes a construction method for ground anchors.
この地盤アンカーの施工法は、地盤に穿設した削孔内に
アンカーロッドを連結したアンカー体を挿入し、グラウ
トを注入し地盤アンカーを施工する方法において、アン
カー体外周部にアンカー体と略平行面をなし昇降する平
面部を先端に有する昇降装置を取付け、この装置を下げ
た状態でアンカー体を削孔内に挿入した後、グラウトを
削孔内に注入し、同時にそのグラウト圧で前記昇降装置
を押上げ、先端の平面部を削孔内面に当接せしめアンカ
ー体を削孔中心部に支持することを特徴とする。This ground anchor construction method involves inserting an anchor body connected to an anchor rod into a hole drilled in the ground, injecting grout, and constructing the ground anchor. Attach a lifting device with a flat surface at its tip that moves up and down, insert the anchor body into the drilled hole with the device lowered, inject grout into the drilled hole, and at the same time use the grout pressure to move the lift up and down. It is characterized in that the device is pushed up, the flat part of the tip comes into contact with the inner surface of the hole, and the anchor body is supported at the center of the hole.
〔実 施 例］
第１図はアンカーロッド２の先端に取付けたアンカー体
３および、このアンカー体３をケーシング４内を挿通ず
る状態を示す。アンカー体３は鋼管からなり、外周に張
出した支圧板５を有し、先端には回忌をなしシリンダー
７が螺合し取付けである。このシリンダー７はピストン
８を内蔵し、そのピストンには先端コーン９が連結しで
ある。またシリンダー７内には、アンカー体３の内グラ
ウト１０層を貫通するグラウトホース１１が開口し、シ
リンダー側面にはグラウト噴出口１２が穿設しである。[Embodiment] FIG. 1 shows an anchor body 3 attached to the tip of an anchor rod 2 and a state in which this anchor body 3 is inserted into a casing 4. The anchor body 3 is made of a steel pipe, has a bearing plate 5 projecting from its outer periphery, and a circular cylinder 7 is screwed onto the tip end thereof. This cylinder 7 houses a piston 8, and a tip cone 9 is connected to the piston. A grout hose 11 is opened in the cylinder 7 and penetrates through 10 layers of grout inside the anchor body 3, and a grout spout 12 is bored in the side surface of the cylinder.
シリンダ−７外周面には第２図のごとく蝶番形をなし、
中央の折曲端１３、一端の固定端１４、他端の可動端１
５をそれぞれ軸着し、折曲端１３にシリンダー面に略平
行な長い平面部１６を取付けてなった６個の昇降装置１
７がシリンダー７を取りまき取付けである。この装置の
固定端１４はシリンダー７に固着した環状の固定座１８
に、また可動端１５はシリンダー７に遊嵌した環状の可
動座１９に軸着し、可動座１９は先端コーン９とピアノ
線２０で緩みなく連結しである。The outer peripheral surface of the cylinder 7 has a hinge shape as shown in Figure 2.
Bent end 13 at the center, fixed end 14 at one end, movable end 1 at the other end
5 are each pivoted, and a long flat portion 16 substantially parallel to the cylinder surface is attached to the bent end 13 of the six lifting devices 1.
7 is the installation surrounding the cylinder 7. The fixed end 14 of this device is an annular fixed seat 18 fixed to the cylinder 7.
Furthermore, the movable end 15 is pivoted to an annular movable seat 19 that is loosely fitted into the cylinder 7, and the movable seat 19 is connected to the tip cone 9 by a piano wire 20 without loosening.
このアンカー体３は以上の構成であり、昇降装置１７す
なわち、平面部１６を下げることにより、アンカー体３
はケーシング４内を挿通できる細径とすることができ、
ケーシング４を経由し、削孔内断定位置への挿入が可能
となる。This anchor body 3 has the above configuration, and by lowering the lifting device 17, that is, the flat part 16, the anchor body 3
can have a small diameter that can be inserted into the casing 4,
Through the casing 4, it can be inserted into a defined position in a drilled hole.
このアンカー体３を用い地盤アンカーを施工するには、
アンカー用地盤を所定深さまでケーシングを用い削孔し
た後、ケーシングをアンカー体設置に必要な長さだけ引
き抜き、第１図のごとく細径となしたアンカー体３をケ
ーシング４を挿通して、削孔１内に挿入する。To construct a ground anchor using this anchor body 3,
After drilling a hole in the ground for the anchor to a predetermined depth using a casing, the casing is pulled out by the length necessary for installing the anchor body, and the anchor body 3, which has a small diameter as shown in Fig. 1, is inserted through the casing 4 and drilled. Insert into hole 1.
この状態で、上部からグラウトホース１１を経由してグ
ラウト６を注入すると、第３図に示すごとく、グラウト
６はシリンダー７内に噴出し、その圧でピストン８は先
端方向に押出され、グラウト噴出０１２位置に達すると
、グラウト６はアンカー体３外の削孔１内に噴出する。In this state, when grout 6 is injected from the upper part via the grout hose 11, the grout 6 is ejected into the cylinder 7 as shown in Fig. 3, and the piston 8 is pushed forward by the pressure, and the grout is ejected. When the 012 position is reached, the grout 6 is ejected into the drilled hole 1 outside the anchor body 3.
ピストン８が押出され、グラウト６が噴出すると同時に
、ピストン８に連結しである先端コーン９が外に押出さ
れるので、先端コーン９とピアノ線２０で緩みなく連結
しである昇降装置１７の可動座１９は固定座１８の方向
に引き寄せられる。蝶番形をなした昇降装置１７は固定
端１４、可動端１５および折曲端１３がそれぞれ回動し
、折曲端に取付けた平面部１６はアンカー体３と平行面
をなし上昇する。シリンダー７の周りの６個の平面部１
６は、それぞれ削孔１内面に当接し、アンカー部３を削
孔１内中心部に支持する。その後、ケーシング４を引き
抜きなから削孔１内にグラウト６を注入し地盤アンカー
を施工する。At the same time that the piston 8 is pushed out and the grout 6 is ejected, the tip cone 9 connected to the piston 8 is pushed out, so that the lifting device 17, which is connected to the tip cone 9 without loosening by the piano wire 20, can move. The seat 19 is drawn towards the fixed seat 18. A fixed end 14, a movable end 15 and a bent end 13 of the hinge-shaped lifting device 17 rotate, and a plane portion 16 attached to the bent end forms a plane parallel to the anchor body 3 and rises. 6 flat parts 1 around cylinder 7
6 are in contact with the inner surface of the drilled hole 1, respectively, and support the anchor part 3 at the center of the drilled hole 1. Thereafter, the casing 4 is pulled out, and grout 6 is injected into the drilled hole 1 to construct a ground anchor.
この実施例は６個１組の昇降装置１７をアンカー体３に
蝮着したシリンダー７に取付けたが、アンカー体３本体
に取付けることも、また複数紐取付けることもできる。In this embodiment, a set of six lifting devices 17 are attached to the cylinder 7 attached to the anchor body 3, but they can also be attached to the main body of the anchor body 3, or a plurality of strings can be attached.
第５図はアンカー体３に２組の昇降装置１７−１．１７
−２を取付け、その先端の２つの折曲４１３，１３にま
たがり、広い面積の平面部１６を取付け、それぞれの可
動座１９をピアノ線２０で先端コーンに連結してなった
態様例であり、高重量のアンカー体を支持するに好適で
ある。Figure 5 shows two sets of lifting devices 17-1.17 on the anchor body 3.
-2 is attached, a wide area flat part 16 is attached spanning the two bends 413, 13 at the tip, and each movable seat 19 is connected to the tip cone with a piano wire 20, Suitable for supporting heavy anchor bodies.
この発明になる地盤アンカーの施工法は、アンカー体を
細径となし削孔内に挿入ができ、傾斜地であってもグラ
ウト注入と同時にアンカー体を削孔内センターに支持が
できる。アンカー体はグラウト圧の大きな力を利用し、
広い面積の平面部を削孔内面に当接して支持するので、
アンカー体が高重量であっても、あるいはケーシング引
抜き等で多少の回転力が作用しても、安定してアンカー
体を支持することができる。In the construction method of the ground anchor according to the present invention, the anchor body has a small diameter and can be inserted into a drilled hole, and even on a slope, the anchor body can be supported at the center of the drilled hole at the same time as grouting. The anchor body utilizes the large force of grout pressure,
Since the flat part with a wide area is supported by contacting the inner surface of the drilled hole,
Even if the anchor body is heavy, or even if some rotational force is applied due to pulling out the casing, etc., the anchor body can be stably supported.
従って、この施工法によると、傾斜地においても信輔性
が高く十分な強度をもった地盤アンカーを施工すること
が可能となる。Therefore, according to this construction method, it is possible to construct a ground anchor with high reliability and sufficient strength even on a slope.
第１．２，３．４図は実施例のアンカー体部分を示すも
のであり、第１図はケーシング内を挿通ずる細径となし
たアンカー体の断面図、第２図は昇降装置の斜視図、第
３図は削孔内で昇降装置を上げアンカー体を支持した状
態の断面図、第４図は２組の昇降装置を取付けたアンカ
ー体の側面図、第５図は従来のアンカー体の削孔内の状
態を示す側面図である。
■・・・削孔、２・・・アンカー体部分、３・・・アン
カー体、４・・・ケーシング、５・・・支圧板、６・・
・グラウト、７・・・シリンダー ８・・・ピストン、
９・・・先端コーン、１０・・・内グラウト、１１・・
・グラウトホース、１２・・・グラウト噴出口、１３・
・・折曲端、１４・・・固定端、１５・・・可動端、１
６・・・平面部、１７・・・昇降装置、１８・・・固定
座、１９・・・可動座、２０・・・ピアノ線。
第１図
第４図
第２図
第５図Figures 1.2 and 3.4 show the anchor body portion of the embodiment, Figure 1 is a sectional view of the anchor body with a small diameter that can be inserted into the casing, and Figure 2 is a perspective view of the lifting device. Figure 3 is a cross-sectional view of the anchor body with the lifting device raised in the drilling hole, Figure 4 is a side view of the anchor body with two sets of lifting devices attached, and Figure 5 is a conventional anchor body. FIG. 3 is a side view showing the state inside the drilled hole. ■... Hole drilling, 2... Anchor body part, 3... Anchor body, 4... Casing, 5... Bearing plate, 6...
・Grout, 7...Cylinder 8...Piston,
9...Tip cone, 10...Inner grout, 11...
・Grout hose, 12... Grout spout, 13.
...Bent end, 14...Fixed end, 15...Movable end, 1
6... Flat part, 17... Lifting device, 18... Fixed seat, 19... Movable seat, 20... Piano wire. Figure 1 Figure 4 Figure 2 Figure 5
Claims (1)
たアンカー体を挿入し、グラウトを注入し地盤アンカー
を施工する方法において、アンカー体外周部にアンカー
体と略平行面をなし昇降する平面部を先端に有する昇降
装置を取付け、この装置を下げた状態でアンカー体を削
孔内に挿入した後、グラウトを削孔内に注入し、同時に
そのグラウト圧で前記昇降装置を押上げ、先端の平面部
を削孔内面に当接せしめアンカー体を削孔中心部に支持
することを特徴とする地盤アンカーの施工法。(1) In the method of constructing a ground anchor by inserting an anchor body connected to an anchor rod into a hole drilled in the ground and injecting grout, the outer periphery of the anchor body is raised and lowered in a plane substantially parallel to the anchor body. Attaching a lifting device having a flat part at the tip, inserting the anchor body into the borehole with the device lowered, injecting grout into the borehole, and simultaneously pushing up the lifting device with the grout pressure, A method of constructing a ground anchor characterized by bringing the flat part of the tip into contact with the inner surface of the drilled hole and supporting the anchor body at the center of the drilled hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10443590A JPH045311A (en) | 1990-04-20 | 1990-04-20 | Execution method for ground anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10443590A JPH045311A (en) | 1990-04-20 | 1990-04-20 | Execution method for ground anchor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH045311A true JPH045311A (en) | 1992-01-09 |
| JPH0581688B2 JPH0581688B2 (en) | 1993-11-15 |
Family
ID=14380589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10443590A Granted JPH045311A (en) | 1990-04-20 | 1990-04-20 | Execution method for ground anchor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH045311A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162275A (en) * | 2018-08-23 | 2019-01-08 | 国网河北省电力有限公司沧州供电分公司 | The strong guy anchor of road holding |
-
1990
- 1990-04-20 JP JP10443590A patent/JPH045311A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162275A (en) * | 2018-08-23 | 2019-01-08 | 国网河北省电力有限公司沧州供电分公司 | The strong guy anchor of road holding |
| CN109162275B (en) * | 2018-08-23 | 2020-06-23 | 国网河北省电力有限公司沧州供电分公司 | Guy anchor with strong ground holding capacity |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0581688B2 (en) | 1993-11-15 |
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