JPS6325132B2 - - Google Patents
Info
- Publication number
- JPS6325132B2 JPS6325132B2 JP5332981A JP5332981A JPS6325132B2 JP S6325132 B2 JPS6325132 B2 JP S6325132B2 JP 5332981 A JP5332981 A JP 5332981A JP 5332981 A JP5332981 A JP 5332981A JP S6325132 B2 JPS6325132 B2 JP S6325132B2
- Authority
- JP
- Japan
- Prior art keywords
- sheath
- anchor
- anchor member
- irregularly shaped
- exterior
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 18
- 239000004519 grease Substances 0.000 claims description 12
- 238000003780 insertion Methods 0.000 claims description 12
- 230000037431 insertion Effects 0.000 claims description 12
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000011440 grout Substances 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 2
- 238000000576 coating method Methods 0.000 claims 2
- 238000004078 waterproofing Methods 0.000 claims 1
- 239000010426 asphalt Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/80—Ground anchors
- E02D5/808—Ground anchors anchored by using exclusively a bonding material
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Description
【発明の詳細な説明】
この発明はPC鋼材の防錆力を要求される永久
アンカーのうち、特に自由長部が長いアースアン
カー工事用のアンカーの施工法およびその施工に
おいて使用する装置に関するものである。[Detailed Description of the Invention] This invention relates to a method of constructing an anchor for earth anchor work, which has a particularly long free length, among permanent anchors that require anti-corrosion properties of prestressed steel, and a device used in the construction. be.
従来アンカーの自由長部はボンド式とアンボン
ド式すなわちセメントグラウト式とグリース式が
あるが、地盤変化あるいはPC鋼材のレラクセー
シヨン等を考慮した場合自由長部の長い永久アン
カーではアンボンド式とすることが望ましい。し
かし従来のアンボンドPC鋼材は、単にPC鋼より
線等のPC鋼材をポリエチレン等の合成樹脂パイ
プで被覆し間隙にグリースを充填したもので、実
際にはフリクシヨンが大きく、十分なアンボンド
効果が得られない欠点がある。すなわち、PC鋼
材とシースとの間隙が小さく、また周囲のモルタ
ル等の充填材からの圧迫があることなどからPC
鋼材とシースの間にフリクシヨンが生ずる。従つ
て自由長部が50ｍあるいは100ｍといつた長大な
アンカーでは緊張力が先端定着部に伝わるまでに
かなりのタイムラグが生ずるかあるいは所定の緊
張力の導入が困難なばかりでなく、鋼材にかかる
緊張力の増減の繰返しで材料の疲れの問題も起こ
る。さらに強度の小さいシースが破損しやすいと
いう問題もある。 Conventional anchors have a bonded type or an unbonded type, that is, a cement grout type or a grease type for the free length of the anchor, but when considering ground changes or relaxation of prestressed steel materials, it is preferable to use the unbonded type for permanent anchors with a long free length. . However, conventional unbonded PC steel materials are simply made by covering PC steel materials such as PC steel strands with synthetic resin pipes such as polyethylene, and filling the gaps with grease.In reality, the friction is large and a sufficient unbonding effect cannot be obtained. There are no drawbacks. In other words, the gap between the PC steel material and the sheath is small, and there is pressure from surrounding fillers such as mortar, so the PC
Friction occurs between the steel material and the sheath. Therefore, with a long anchor with a free length of 50 m or 100 m, there is a considerable time lag before the tension is transmitted to the tip anchorage, or it is not only difficult to introduce the specified tension, but also the tension applied to the steel material. Repeated increases and decreases in force also cause problems with material fatigue. Another problem is that the sheath, which has low strength, is easily damaged.
この発明はこのような従来の問題を解決するた
めになされたものである。 This invention was made to solve such conventional problems.
この発明に係るアンカー部材Ａは、第１図およ
び第２図に示すように自由長部はPCストランド
１等のPC鋼材をそれぞれ内装シース２で覆い、
内装シース２とPCストランド１の隙間には防錆
グリース３を充填してなるいわゆるアンボンド
PC鋼材を用いる。自由長部のアンボンドPC鋼材
は外装シース４の内部に貫挿されており、アンボ
ンドPC鋼材と外装シース４の隙間には防錆グリ
ース３′が封入されている。また外装シース４の
両端は封入したグリース３′の漏洩防止のためア
スフアルト系硬化剤５等で止水処理をしている。 As shown in FIGS. 1 and 2, the anchor member A according to the present invention has a free length portion that covers a PC steel material such as a PC strand 1 with an inner sheath 2, and
The gap between the interior sheath 2 and the PC strand 1 is filled with anti-corrosion grease 3 to create a so-called unbond.
Uses PC steel material. The unbonded PC steel material of the free length portion is inserted into the interior of the exterior sheath 4, and the gap between the unbonded PC steel material and the exterior sheath 4 is filled with antirust grease 3'. Further, both ends of the exterior sheath 4 are treated with water-stopping treatment using an asphalt-based curing agent 5 or the like to prevent the sealed grease 3' from leaking.
定着長部は複数のPCストランド１が相互に移
動しないように結束クランプ６で固定し、PCス
トランド１の先端部集束のためパイロツトキヤツ
プ７をかぶせる。定着長部のPCストランド１は
その全体を異形シース８で覆う。異形シース８の
片端は密閉されており、他端は外装シース４に取
付けられる。取付け部９は止水処理がなされる。
異形シース８の内部はすべての加工が終了した
後、速硬性の硬化剤１０を圧入し、PCストラン
ド１と異形シース８を一体化する。 The fixing length part is fixed with a bundling clamp 6 to prevent the plurality of PC strands 1 from moving relative to each other, and a pilot cap 7 is covered to collect the tips of the PC strands 1. The PC strand 1 of the fixing length portion is entirely covered with a deformed sheath 8. One end of the irregularly shaped sheath 8 is sealed, and the other end is attached to the outer sheath 4. The mounting portion 9 is subjected to water-stop treatment.
After all the processing is completed, a fast-curing curing agent 10 is press-fitted into the inside of the irregularly shaped sheath 8, and the PC strand 1 and the irregularly shaped sheath 8 are integrated.
このアンカー部材Ａの組立はすべて削孔Ｄへの
挿入前に地上で行なう。 All of the assembly of this anchor member A is done on the ground before it is inserted into the drilled hole D.
なお図の実施例では、PCストランド１は直径
17.8mmの19本より、内装シース２はポリエチレン
製厚さ1.2mm、外装シース４は硬質ポリエチレン
製、外径89mm、厚さ5.5mmのものを使用している。
また定着長部の長さL3は10ｍ、自由長部の長さ
L2は90ｍ、全長101ｍのものを考えている。異形
シース８としては波形加工した金属製のシース等
が利用できる。 In the example shown in the figure, the PC strand 1 has a diameter of
Of the 19 pieces of 17.8 mm, the inner sheath 2 is made of polyethylene with a thickness of 1.2 mm, and the outer sheath 4 is made of hard polyethylene with an outer diameter of 89 mm and a thickness of 5.5 mm.
Also, the length of the fixed length part L3 is 10m, and the length of the free length part is
I'm thinking of L 2 being 90m long and 101m long. As the irregularly shaped sheath 8, a corrugated metal sheath or the like can be used.
このようにして地上で組立てられたアンカー部
材Ａは用意されたアンカー部材挿入装置（第３図
参照）のリール１３に巻き取る。アンカー部材挿
入装置はアンカー部材Ａの巻き取りおよび送り出
しを行なう送り出し装置Ｂとアンカー部材Ａを削
孔Ｄへガイドするガイド装置Ｃからなる。巻き取
りはアンカー部材Ａの自由長部側端部のPCスト
ランド１のうちの一本あるいは数本を取り出し、
リール１３のフランジ等に固定させた後巻き始め
る。リール１３は第４図および第５図に示すよう
に、制御装置１４（図の実施例ではバンドブレー
キ）のある支持枠１５に取り付け、回転を制御し
ながらアンカー部材Ａの送り出しを行なう。100
ｍにも及ぶアンカー部材Ａを挿入する場合、アン
カー部材自身の重量も非常に大きくなり、この制
御装置１４によりアンカー部材Ａの抜け出し防止
が図られる。ガイド装置Ｃは第６図および第７図
に示すように、所定角度θで狭まつて行くガイド
枠１７間に複数個のガイドローラー１６を配置し
たもので、鉛直面内において各ガイドローラー１
６の回転軸を結ぶ曲線が、アンカー部材送り出し
装置Ｂより削孔Ｄのアンカー部材挿入口に向け
て、円弧状となるように配置してある。また、ガ
イドローラー１６はガイド枠１７間にわたした水
平軸１８の回りに回動自在であり、かつガイド枠
１７の幅内でこの軸１８に対し、横方向に摺動自
在としてある。すなわち、この実施例では軸１８
はその両端がガイド枠１７に固定され、ガイドロ
ーラー１６の中空部を軸１８に通すことにより、
ガイドローラー１６は軸１８の回りに回動自在、
かつ水平軸１８に沿つて水平方向に摺動自在とな
つている。第８図はこのガイドローラー１６を横
方向に摺動させる理由を示したものである。すな
わち、リール１３に巻き取られたアンカー部材Ａ
を送り出す場合、送り出し位置はリール１３の幅
内で変化する。一方削孔Ｄの位置は変化しない。
従つてガイドローラー１６は削孔Ｄとリール１３
のフランジのなす角θの範囲で移動させる必要が
ある。削孔Ｄから送り出し装置Ｂの中心までの距
離を５ｍとした場合、アンカー部材挿入装置の高
さを約3.5ｍと考えθは15゜程度である。 The anchor member A assembled on the ground in this manner is wound onto the reel 13 of a prepared anchor member insertion device (see FIG. 3). The anchor member insertion device consists of a feeding device B that winds up and feeds out the anchor member A, and a guide device C that guides the anchor member A to the drilled hole D. For winding, take out one or several of the PC strands 1 at the free length side end of the anchor member A,
After fixing it to the flange of the reel 13, winding begins. As shown in FIGS. 4 and 5, the reel 13 is attached to a support frame 15 equipped with a control device 14 (a band brake in the illustrated embodiment), and the anchor member A is sent out while controlling its rotation. 100
When inserting the anchor member A, which is as long as m, the weight of the anchor member itself becomes very large, and the control device 14 prevents the anchor member A from slipping out. As shown in FIGS. 6 and 7, the guide device C has a plurality of guide rollers 16 arranged between guide frames 17 that narrow at a predetermined angle θ.
The curve connecting the rotation axes 6 is arranged in an arc shape from the anchor member delivery device B toward the anchor member insertion opening of the drilled hole D. Further, the guide roller 16 is rotatable around a horizontal shaft 18 extending between the guide frames 17, and is slidable laterally with respect to this shaft 18 within the width of the guide frame 17. That is, in this embodiment, the shaft 18
is fixed at both ends to the guide frame 17, and by passing the hollow part of the guide roller 16 through the shaft 18,
The guide roller 16 is rotatable around the shaft 18,
Moreover, it is slidable in the horizontal direction along the horizontal axis 18. FIG. 8 shows the reason why the guide roller 16 is slid in the lateral direction. That is, the anchor member A wound on the reel 13
When sending out the reel 13, the sending position changes within the width of the reel 13. On the other hand, the position of the drilled hole D does not change.
Therefore, the guide roller 16 is connected to the hole D and the reel 13.
It is necessary to move within the range of the angle θ formed by the flanges. If the distance from the drilling hole D to the center of the feeding device B is 5 m, the height of the anchor member insertion device is approximately 3.5 m, and θ is approximately 15°.
削孔Ｄにはあらかじめセメントペースト等のグ
ラウト１１が注入されており、この中へアンカー
部材Ａを挿入してアンカー定着体が得られる。 A grout 11 such as cement paste is injected into the hole D in advance, and the anchor member A is inserted into the grout 11 to obtain an anchor fixing body.
なお第１図中１２は削孔Ｄ掘削用のケーシング
を示し、強固な岩盤Ｅに達した後はケーシングに
挿入したロツド先端のビツトにより掘削が行なわ
れる。 In Fig. 1, reference numeral 12 indicates a casing for drilling hole D, and after reaching a solid rock E, drilling is carried out using a bit at the tip of a rod inserted into the casing.
従来では通常永久アンカー工事に使用するアン
カー部材はポリエチレン樹脂等による外装シース
の中にPCストランドが挿入されている。そして
このアンカー部材を削孔中に挿入する場合は外装
シースを把み、外装シースに力を与えながら部材
の挿入を行なつている。この場合、中のPCスト
ランドの強度に比べ、外装シースとして使用され
るポリエチレン等は非常に弱く、シースが痛み傷
つけられることがしばしばある。特に長尺や垂直
なアンカー工事を行なう場合、アンカー部材の自
重を外装シースの引張強度だけでもたせていたた
め、せつかくのアンボンド加工がずれたりして、
モルタルがアンボンド部に侵入したり、グリース
が定着部に影響したりした。 Conventionally, the anchor members normally used for permanent anchor work have PC strands inserted into an exterior sheath made of polyethylene resin or the like. When inserting this anchor member into a hole being drilled, the outer sheath is grasped and the member is inserted while applying force to the outer sheath. In this case, the polyethylene used as the outer sheath is very weak compared to the strength of the inner PC strand, and the sheath is often damaged. Particularly when performing long or vertical anchor work, the weight of the anchor member was supported solely by the tensile strength of the outer sheath, which caused the unbonding process to become misaligned.
Mortar has invaded the unbonded area, or grease has affected the anchored area.
アンカー部材Ａの挿入作業をするとき、この発
明では、前述したように、アンカー部材Ａを一旦
リール１３に巻き取りその端部をリール１３と一
体化させ、回転を制御しながらアンカー部材Ａの
挿入を計る。この場合アンカー部材Ａの重量及び
押しまたは引き等のアンカー部材の動きに伴う力
はPCストランドにかかつており、外装シース４
には引張力は作用しない。また削孔Ｄの孔口に設
けられたガイドローラー１６が回転することによ
り、外装シース４は、アンカー部材Ａの直角方向
の押圧力の影響を受けるが、アンカー部材Ａの直
線方向の引張力は加わらない。従つて以上述べた
アンカー部材挿入装置を用意することにより、ア
ンボンド加工したアンカー部材Ａを破損すること
なく所定の位置にセツトすることができる。 When inserting the anchor member A, in this invention, as described above, the anchor member A is wound onto the reel 13 and its end is integrated with the reel 13, and the anchor member A is inserted while controlling the rotation. Measure. In this case, the weight of the anchor member A and the force associated with the movement of the anchor member, such as pushing or pulling, are on the PC strand, and the outer sheath 4
No tensile force acts on . Furthermore, as the guide roller 16 provided at the mouth of the drilled hole D rotates, the exterior sheath 4 is affected by the pressing force in the right angle direction of the anchor member A, but the tensile force in the linear direction of the anchor member A is I won't join. Therefore, by preparing the anchor member insertion device described above, the unbonded anchor member A can be set in a predetermined position without being damaged.
この発明は以上の構成からなり、次のような利
点特徴を有する。 The present invention has the above configuration and has the following advantageous features.
(1) PC鋼材が二重のシースで保護されており、
またPC鋼材は完全に密封されているので削孔
内に湧水があつた場合でも防錆が確実である。(1) The PC steel material is protected by a double sheath,
In addition, since the PC steel material is completely sealed, rust prevention is ensured even if spring water gets into the drilled hole.
(2) 二重に保護されていることによりアンボンド
ケーブルの問題点の一つであるフリクシヨンの
軽減が図れる。従つて導入応力を確実にアンカ
ー定着部に伝達することができる。(2) Double protection reduces friction, which is one of the problems with unbonded cables. Therefore, the introduced stress can be reliably transmitted to the anchor fixing section.
(3) 地盤変化あるいは鋼材のレラクセーシヨン等
でPC鋼材の緊張力に変化があつた場合でも随
時再緊張等の調整を行なうことができる。従つ
て永久アンカーとして有効に機能させることが
できる。(3) Even if the tension of the prestressing steel changes due to changes in the ground or relaxation of the steel, adjustments such as re-tensioning can be made at any time. Therefore, it can effectively function as a permanent anchor.
(4) アンカー部材の組立て、グリース注入等すべ
て削孔挿入前に地上で行なうため二次グラウト
が不要である。また二次グラウトパイプ、排気
パイプ等が不要であるため、作業能率が良く、
アンカー部材もコンパクトになるので削孔径が
小さくて済む。(4) All anchor member assembly, grease injection, etc. are done on the ground before drilling and insertion, so there is no need for secondary grouting. In addition, there is no need for secondary grout pipes, exhaust pipes, etc., so work efficiency is high.
Since the anchor member is also compact, the diameter of the hole to be drilled can be small.
(5) 前述したようにこの発明のアンカー部材挿入
装置を使用することにより、シースを損つける
ことなく、安全に所定位置へセツトすることが
できる。(5) As described above, by using the anchor member insertion device of the present invention, the sheath can be safely set in a predetermined position without damaging it.
第１図は設置されるアンカー部材を示す縦断面
図、第２図は第１図の―断面でみたアンカー
部材の横断面図、第３図はアンカー部材挿入装置
の正面図、第４図は送り出し装置の正面図、第５
図はその右側面図、第６図はガイド装置の平面
図、第７図はその縦断面図、第８図はアンカー部
材挿入装置の配置説明図である。
Ａ……アンカー部材、Ｂ……送り出し装置、Ｃ
……ガイド装置、Ｄ……削孔、Ｅ……岩盤、１…
…PCストランド、２……内装シース、３，３′…
…防錆グリース、４……外装シース、５……アス
フアルト系硬化剤、６，６′……結束クランプ、
７……パイロツトキヤツプ、８……異形シース、
９……取付け部、１０……硬化剤、１１……グラ
ウト、１２……ケーシング、１３……リール、１
４……制御装置、１５……支持枠、１６……ガイ
ドローラー、１７……ガイド枠、１８……軸。
Fig. 1 is a longitudinal cross-sectional view showing the anchor member to be installed, Fig. 2 is a cross-sectional view of the anchor member taken along the cross section of Fig. 1, Fig. 3 is a front view of the anchor member insertion device, and Fig. 4 is a longitudinal cross-sectional view of the anchor member to be installed. Front view of the delivery device, 5th
6 is a plan view of the guide device, FIG. 7 is a longitudinal sectional view thereof, and FIG. 8 is an explanatory diagram of the arrangement of the anchor member insertion device. A... Anchor member, B... Feeding device, C
...Guide device, D...Drilling, E...Bedrock, 1...
...PC strand, 2...Interior sheath, 3, 3'...
...Anti-rust grease, 4...Exterior sheath, 5...Asphalt hardening agent, 6,6'...Binding clamp,
7...Pilot cap, 8...Irregular sheath,
9... Mounting part, 10... Hardening agent, 11... Grout, 12... Casing, 13... Reel, 1
4... Control device, 15... Support frame, 16... Guide roller, 17... Guide frame, 18... Axis.
Claims (1)
スで被覆し、隙間に防錆グリースを充填してなる
所要本数のアンボンドPC鋼材を外装シース内に
貫通させ、外装シースの両端を止水処理し、かつ
外装シース内にも防錆グリースを封入し、アンカ
ーの定着長部は前記外装シースを貫通して突出し
たPC鋼材を結束して、片端を密閉した異形シー
ス内に挿入し、異形シースの他端は前記外装シー
スの端部に装着し、この異形シース内に硬化剤を
圧入し、前記PC鋼材と異形シースを一体化して
アンカー部材を構成し、このアンカー部材をグラ
ウト注入した削孔内に挿入して定着させることを
特徴とするアンカーの施工法。 ２ 内装シースはポリエチレン被覆によるもので
ある特許請求の範囲第１項記載のアンカーの施工
法。 ３ 外装シースは可撓性を有する硬質ポリエチレ
ンなどの合成樹脂管被覆によるものである特許請
求の範囲第１項または第２項のいずれか１項記載
のアンカーの施工法。 ４ PC鋼材はPCストランドである特許請求の範
囲第１項、第２項、または第３項のいずれか１項
記載のアンカーの施工法。 ５ 異形シースは波形加工した金属製シースであ
る特許請求の範囲第１項、第２項、第３項、また
は第４項のいずれか１項記載のアンカーの施工
法。 ６ アンカーの自由長部は、あらかじめ内装シー
スで被覆し、隙間に防錆グリースを充填してなる
所要本数のアンボンドPC鋼材を外装シース内に
貫通させ、外装シースの両端を止水処理し、かつ
外装シース内にも防錆グリースを封入し、アンカ
ーの定着長部は前記外装シースを貫通して突出し
たPC鋼材を結束して、片端を密閉した異形シー
ス内に挿入し、異形シースの他端は前記外装シー
スの端部に装着し、この異形シース内に硬化剤を
圧入し、前記PC鋼材と異形シースを一体化して
アンカー部材を構成し、このアンカー部材を削孔
内に挿入するために使用する装置であり、前記ア
ンカー部材後端を固定し、アンカー部材を巻き取
るリールおよびアンカー部材の送り出し速度を制
御する制御装置を支持枠に取付けてなるアンカー
部材送り出し装置と、所定角度で狭まつて行くガ
イド枠間に複数個のガイドローラーを、鉛直面内
において前記各ガイドローラーの回転軸を結ぶ曲
線が前記アンカー部材送り出し装置より前記削孔
のアンカー部材挿入口に向けて、円弧状となるよ
う配置し、前記アンカー部材送り出し装置より送
られてくるアンカー部材を削孔のアンカー部材挿
入口へ向けてガイドするガイド装置とからなるこ
とを特徴とするアンカー部材挿入装置。 ７ 制御装置はリール側面に設けたバンドブレー
キである特許請求の範囲第６項記載のアンカー部
材挿入装置。[Scope of Claims] 1. The free length of the anchor is covered with an inner sheath in advance, and the required number of unbonded prestressed steel members, which are made by filling the gap with anti-rust grease, are passed through the outer sheath, and both ends of the outer sheath are covered with an inner sheath. Waterproofing treatment is applied, and anti-rust grease is also sealed inside the exterior sheath, and the fixed length part of the anchor penetrates the exterior sheath, bundles the protruding PC steel material, and inserts it into the irregularly shaped sheath with one end sealed. The other end of the irregularly shaped sheath is attached to the end of the exterior sheath, a hardening agent is press-fitted into the irregularly shaped sheath, the PC steel material and the irregularly shaped sheath are integrated to form an anchor member, and this anchor member is injected with grout. An anchor construction method characterized by inserting and fixing the anchor into a drilled hole. 2. The anchor construction method according to claim 1, wherein the interior sheath is made of polyethylene coating. 3. The method of constructing an anchor according to claim 1 or 2, wherein the exterior sheath is made of a flexible synthetic resin tube coating such as hard polyethylene. 4. The anchor construction method according to claim 1, 2, or 3, wherein the PC steel material is a PC strand. 5. The anchor construction method according to any one of claims 1, 2, 3, or 4, wherein the irregularly shaped sheath is a corrugated metal sheath. 6. The free length of the anchor is covered with an inner sheath in advance, the gap is filled with anti-rust grease, and the required number of unbonded prestressed steel members are passed through the outer sheath, both ends of the outer sheath are treated to be waterproof, and Rust-preventive grease is also sealed inside the exterior sheath, and the fixed length part of the anchor penetrates the exterior sheath and bundles the protruding PC steel material, inserts it into the irregularly shaped sheath with one end sealed, and then inserts the other end of the irregularly shaped sheath. is attached to the end of the exterior sheath, a hardening agent is press-fitted into this irregularly shaped sheath, the aforementioned PC steel material and irregularly shaped sheath are integrated to form an anchor member, and this anchor member is inserted into the drilled hole. The device used includes an anchor member feeding device that fixes the rear end of the anchor member, a reel for winding up the anchor member, and a control device for controlling the feeding speed of the anchor member, which is attached to a support frame, and A plurality of guide rollers are arranged between the moving guide frames, and a curve connecting the rotational axes of each guide roller in a vertical plane becomes an arc shape from the anchor member feeding device toward the anchor member insertion port of the drilling hole. An anchor member insertion device characterized by comprising a guide device arranged as shown in FIG. 7. The anchor member insertion device according to claim 6, wherein the control device is a band brake provided on the side of the reel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5332981A JPS57169129A (en) | 1981-04-09 | 1981-04-09 | Construction method and apparatus for anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5332981A JPS57169129A (en) | 1981-04-09 | 1981-04-09 | Construction method and apparatus for anchor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57169129A JPS57169129A (en) | 1982-10-18 |
| JPS6325132B2 true JPS6325132B2 (en) | 1988-05-24 |
Family
ID=12939684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5332981A Granted JPS57169129A (en) | 1981-04-09 | 1981-04-09 | Construction method and apparatus for anchor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57169129A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3125166C3 (en) * | 1981-06-26 | 1993-12-02 | Dyckerhoff & Widmann Ag | Method for producing a re-tensionable compression anchor |
| JPS60110381A (en) * | 1983-11-20 | 1985-06-15 | Sumitomo Electric Ind Ltd | Method for inhibiting corrosion of pc steel material and ps anchor |
| JPS60110446A (en) * | 1984-06-16 | 1985-06-15 | 住友電気工業株式会社 | Pc steel material and manufacture thereof |
| JPS6282117A (en) * | 1985-10-07 | 1987-04-15 | Taisei Corp | Anchor |
| JPH0718159B2 (en) * | 1988-03-17 | 1995-03-01 | 鹿島建設株式会社 | Loading and laying of vertical anchor cables |
| JPH0611996B2 (en) * | 1988-09-14 | 1994-02-16 | 大成建設株式会社 | Removal anchor method |
| JP2501780B2 (en) * | 1991-05-22 | 1996-05-29 | 建設基礎エンジニアリング株式会社 | Anchor |
| JPH0733664B2 (en) * | 1991-06-10 | 1995-04-12 | 建設基礎エンジニアリング株式会社 | anchor |
| JP3057625B2 (en) * | 1993-12-07 | 2000-07-04 | 黒沢建設株式会社 | Ground anchor |
| JP5325586B2 (en) * | 2009-01-16 | 2013-10-23 | 株式会社大林組 | How to insert an anchor |
| JP5730175B2 (en) * | 2011-11-11 | 2015-06-03 | 株式会社大林組 | Uncurtain Don Insertion Method, Uncurtain Don Support Unit, and Uncurtain Don Base |
| EP3913144B1 (en) * | 2020-05-22 | 2023-09-06 | BAUER Spezialtiefbau GmbH | Method for making a tie rod in the ground and receiving drum for a cable element |
-
1981
- 1981-04-09 JP JP5332981A patent/JPS57169129A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57169129A (en) | 1982-10-18 |
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