JPH0270821A - Anchor tension member - Google Patents
Anchor tension memberInfo
- Publication number
- JPH0270821A JPH0270821A JP18459388A JP18459388A JPH0270821A JP H0270821 A JPH0270821 A JP H0270821A JP 18459388 A JP18459388 A JP 18459388A JP 18459388 A JP18459388 A JP 18459388A JP H0270821 A JPH0270821 A JP H0270821A
- Authority
- JP
- Japan
- Prior art keywords
- anchor
- grip
- grips
- stress
- tensile
- 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
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 238000012856 packing Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 37
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 239000004568 cement Substances 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 125000006850 spacer group Chemical group 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、土留壁等を支持するアンカーエ法にに使用す
るアンカー引張材に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an anchor tensile material used in the anchorage method for supporting earth retaining walls and the like.
従来の技術
アンカーは、−船釣に地中に孔を削孔して、ＰＣ鋼線や
ｐｃ鋼撚線等の引張鋼材を挿入し、セメントミルク等の
アンカーペーストを充填して硬化させて定着体を構成し
、定着体と地中の周面地盤との摩擦抵抗及び引張鋼材と
定着体との間の付着力により引張鋼材に作用する引抜き
力に抵抗させている。従って、アンカーの抵抗力を向上
させるためには、引張鋼材とアンカーペーストとの付着
力を増大させることが要求される。そのため従来。Conventional technology Anchors are made by - Drilling a hole in the ground during boat fishing, inserting a tensile steel material such as PC steel wire or PC stranded wire, filling it with an anchor paste such as cement milk, and hardening it to fix it. The tensile steel member resists the pulling force acting on the tensile steel member due to the frictional resistance between the anchoring member and the underground surrounding ground and the adhesive force between the tensile steel member and the anchoring member. Therefore, in order to improve the resistance of the anchor, it is required to increase the adhesion between the tensile steel and the anchor paste. Therefore conventional.
引張鋼材と定着体の付着力を向上させる為に、引張鋼材
に複数個のグリップを所定間隔で設けたものが提案され
ている（実開昭５５−９６９３２号公報、特開昭５８−
６００号公報）。In order to improve the adhesion force between the tensile steel material and the fixing body, it has been proposed that the tensile steel material is provided with a plurality of grips at predetermined intervals (Utility Model Application Publication No. 55-96932, Japanese Patent Application Laid-Open No. 1983-1999).
600).
発明が解決しようとする問題点
前記従来提案されているように、グリップを複数個取付
ることにより、引張鋼材と定着体との付着力を増大させ
る効果を奏する。しかしながら。Problems to be Solved by the Invention As previously proposed, attaching a plurality of grips has the effect of increasing the adhesive force between the tensile steel material and the fixing body. however.
張力により引張鋼材はその基端部から伸びるので、各グ
リップに作用する応力は一律でなく、引張応力が定着体
に均等に伝達されず、定着体に部分的に応力集中が起こ
り、その応力がある限界以上に達するとその部分に微細
なひび割れが生じ、定着体が連鎖的に破壊される現象が
生じる。長い間ひび割れが生じたまま地中に放置して置
くと、地中の水分や有害ガス等がひび割れを通って定着
体内部に侵入して、引張鋼材を腐食させることになり。Since the tensile steel material stretches from its base end due to tension, the stress acting on each grip is not uniform, and the tensile stress is not evenly transmitted to the anchor, causing stress concentration to occur locally on the anchor, and the stress When it reaches a certain limit, minute cracks occur in that part, resulting in a chain reaction of destruction of the fixing body. If cracks are left underground for a long time, moisture and harmful gases from the ground will penetrate through the cracks and enter the anchoring body, corroding the tensile steel.
アンカー強度が低下する。Anchor strength decreases.
本発明は、上記実状に鑑み創案されたものであって、引
張鋼材に加わる引張応力を均一に分散させて定着体に伝
えて、定着体との付着力を向上させると共に、応力集中
による定着体の微細なひび割れを防止して、引張鋼材の
腐食を防止することができるアンカー引張材を提供する
ことを目的とするものである。The present invention was devised in view of the above-mentioned circumstances, and it uniformly disperses the tensile stress applied to the tensile steel material and transmits it to the fixing body to improve the adhesion force with the fixing body. An object of the present invention is to provide an anchor tensile material that can prevent minute cracks in the tensile steel material and corrosion of the tensile steel material.
問題点を解決するための手段
上記問題点は、被覆した引張鋼材に複数個のグリップを
適宜間隔で固着し、張力作用時の引張鋼材の伸びによる
グリップの移動量に合せてその厚さを変えたクッション
パツキンをグリップの線動側端部に取り付け、該グリッ
プ及びクッションパツキンを止水シースで被覆してなる
ことを特徴とするアンカー引張材を採用することによっ
て解決できる。Means for solving the problem The above problem can be solved by fixing a plurality of grips to the coated tensile steel material at appropriate intervals, and changing the thickness according to the amount of movement of the grips due to the elongation of the tensile steel material when tension is applied. This problem can be solved by employing an anchor tension member characterized in that a cushion gasket is attached to the linear movement side end of the grip, and the grip and cushion gasket are covered with a waterproof sheath.
作用
引張鋼材の定着部となる部分に、グリップを取り付け、
引張力を加えると、グリップの軸方向断面に引張応力が
働くことにより、引張力が定着体に伝達されるので、数
個のグリップを取り付けることにより、引張応力を分散
して定着体に伝達することになる。引張応力により、ア
ンボンド加工された引張鋼材は固定端側より伸び、その
伸び量は、アンカー自由端部（応力側）に近付くにつれ
累積されて大きくなるので、グリップの移動量が大きく
なる。その結果、各グリップの支圧面で伝達される引張
応力が異なり、定着体に部分的に応力集中が起こる。従
って、そのグリップの移動量分だけクツションするクッ
ションパツキンをグリップの移動方向端部と定着体との
間に介在させれば、各グリップ支正面から均等な引張応
力が定着体に伝達される。その結果、定着体に局部的に
引張応力が集中することもなく、定着体全体で引張力に
耐えるので、定着体の微細なひび割れによる破壊を防止
する。それにより、地下水等の侵入がなく、引張鋼材の
腐食を防止して、アンカーの信頼性を高めることができ
る。その上、引張鋼材はアンボンド加工により被覆され
、またグリップ及びクッションパツキンにより被覆され
ているので、引張材全体として完全に被覆されているこ
とになり、地下水や有害ガスから半永久的に保護される
。Attach a grip to the part that will become the anchoring part of the tensile steel material,
When a tensile force is applied, the tensile stress acts on the axial cross section of the grip, and the tensile force is transmitted to the fixing body. By attaching several grips, the tensile stress can be distributed and transmitted to the fixing body. It turns out. Due to the tensile stress, the unbonded tensile steel material stretches from the fixed end side, and the amount of elongation accumulates and increases as it approaches the free end (stress side) of the anchor, so the amount of movement of the grip increases. As a result, the tensile stress transmitted on the pressure bearing surface of each grip is different, and stress concentration occurs locally on the fixing body. Therefore, if a cushion gasket that provides cushioning by the amount of movement of the grip is interposed between the end of the grip in the moving direction and the fixing body, an equal tensile stress is transmitted from each grip supporting surface to the fixing body. As a result, tensile stress is not locally concentrated on the fixing body, and the entire fixing body can withstand the tensile force, thereby preventing destruction of the fixing body due to minute cracks. Thereby, there is no intrusion of groundwater, etc., corrosion of the tensile steel material can be prevented, and the reliability of the anchor can be increased. Moreover, since the tensile steel material is coated by unbonding and also covered by the grip and cushion packing, the tensile steel material as a whole is completely coated and is semi-permanently protected from ground water and harmful gases.
実施例
以下、本発明の実施例を図面に基づいて詳細に説明する
。Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
第１図本発明によるアンカー引張材によるアンカー造成
実施例を示す。図中１は、アンボンド加工されたｐｃｍ
線やＰＣ撚鋼線からなる引張鋼材であり、２は該引張鋼
材の定着部Ａとなる部分にほぼ等間隔に圧着されたコン
プレッショングリップである。３はアンボンド加工され
た引張鋼材の伸びによる生じる個々のグリップの移動量
に合わせてその厚さを変えたクッションパツキンであり
。FIG. 1 shows an embodiment of anchor construction using an anchor tensile material according to the present invention. 1 in the figure is unbonded pcm
It is a tensile steel material made of wire or PC stranded steel wire, and 2 is a compression grip that is crimped to a portion of the tensile steel material that will become the anchoring part A at approximately equal intervals. 3 is a cushion gasket whose thickness is changed according to the amount of movement of each grip caused by the elongation of the unbonded tensile steel material.
スポンジや生ゴム等で形成されている。該クッションパ
ツキンは、最端部のグリップ２１部には取り付けられて
なく、２個目のグリップ２７部以降からその移動量のク
ツションを有する厚さで順次取り付けられている。４は
グリップ及びクッションパツキンを被覆する止水シース
であり、ポリエチレンやポリプロピレン等で形成され、
第５図及び第６図に示すように、その部分を被覆して地
下水や有害ガスの侵入を防止している。上記引張材はア
ンカー長さに関係なく、固定側の定着部長さを４メート
ル以下にして、その間に上記のグリップ及びクッション
パツキンをほぼ１メートル間隔で３〜４個取付ければ、
コンクリートの強度が低強度でも１個のコンプレッショ
ングリップに係る引張強度は１／３〜１／４に減少され
るので、高荷重の引張りが可能である。It is made of sponge, raw rubber, etc. The cushion gasket is not attached to the grip 21 portion at the end, but is attached sequentially from the second grip portion 27 onward with a thickness that has a cushion corresponding to the amount of movement. 4 is a waterproof sheath that covers the grip and cushion gasket, and is made of polyethylene, polypropylene, etc.
As shown in Figures 5 and 6, the area is covered to prevent groundwater and harmful gases from entering. Irrespective of the length of the anchor, the above tensile material can be used by keeping the length of the anchoring part on the fixed side to 4 meters or less, and attaching 3 to 4 of the above grips and cushion pads at approximately 1 meter intervals between them.
Even if the strength of concrete is low, the tensile strength of one compression grip is reduced to 1/3 to 1/4, making it possible to carry out high-load tension.
以上のようにして構成された引張材を、本実施例では、
複数本（３本）をスペーサ５によって均等に配列して束
ねて、引張材ユニット１ｏを得ている。このようにして
得られた引張材ユニットｌＯをアンカーホール１１に挿
入して、定着部となる個所Ａにセメントペーストを充填
して硬化させ。In this example, the tensile material constructed as described above is
A tensile material unit 1o is obtained by uniformly arranging and bundling a plurality of pieces (three pieces) using spacers 5. The tensile material unit IO obtained in this manner is inserted into the anchor hole 11, and the portion A that will become the anchoring portion is filled with cement paste and hardened.
定着体６を形成している。そして、従来の７ンヵ−工法
と同様にアンカー引張材をジヤツキで引張り、引き伸ば
された状態のまま固定してアンカーとしての機能を発揮
させる。A fixing body 6 is formed. Then, similar to the conventional 7-anker construction method, the anchor tension material is pulled with a jack and fixed in the stretched state to function as an anchor.
なお、プレストレストを導入した場合、止水シース４は
、定着体６とコンプレッショングリップ２によって圧縮
されて破損する恐れがあるが、第７図に示すように、止
水シース４と定着体６との間にＭＣナイロンキャップ１
３を介在させることにより、止水シースが直接定着体面
に圧接されることがなくなり、止水シースの保護を図る
ことができる。なお、止水シース４の端部は引張鋼材の
シースに密着させるため、テーピング１４を施しである
。Note that when pre-stressing is introduced, the water-stop sheath 4 may be compressed and damaged by the fixing body 6 and the compression grip 2, but as shown in FIG. MC nylon cap 1 in between
3, the water-stop sheath is not brought into direct pressure contact with the fixing body surface, and the water-stop sheath can be protected. Note that the end of the water-stopping sheath 4 is taped 14 in order to bring it into close contact with the tensile steel sheath.
このようにして、ＭＣナイロンキャップ１３を介在させ
た供試体を製作して実験を行った結果、１４〜１５回の
テストを行い、供試体を割って中の状態を確認した所、
コンプレッショングリップ及びクッションパツキンを保
護する止水シースの破損は一度も確認されなかった。In this way, we fabricated a specimen with the MC nylon cap 13 interposed therein and conducted an experiment. After conducting 14 to 15 tests, we broke the specimen and confirmed the condition inside.
No damage to the water-stop sheath that protects the compression grip and cushion gasket was observed.
効果
本発明は、以上のような構成からなり、次のような優れ
た効果を奏するものである。Effects The present invention has the above-described configuration, and has the following excellent effects.
引張鋼材にグリップを複数個取り付けろことにより、個
々のグリップ支圧面から引張力を分散して定着体に伝達
することができるので、全体として高荷重の伝達に耐え
ることができる。By attaching a plurality of grips to the tensile steel material, the tensile force can be distributed from the individual grip bearing surfaces and transmitted to the fixing body, so that the entire grip can withstand high load transmission.
グリップの応力側にその移動量に応じて厚さを変えたク
ッションパツキンを設けであるので、グリップに伝達す
る引張応力を深部側のグリップより順次均一に分散する
ことができる。その結果、定着体に応力集中がなくなり
、微細なひび割れの発生が防止されて定着体の破壊がな
くなる。それにより、引張鋼材が地下水や有害ガスの作
用により腐食することが防止される。一方、１個のグリ
ップにかかる引張力はそのグリップ数分の１になるので
、コンクリートの強度が低強度でも十分な緊張が可能と
なり、定着体の容積を減少させることができる。Since the stress side of the grip is provided with a cushion gasket whose thickness changes depending on the amount of movement thereof, the tensile stress transmitted to the grip can be uniformly distributed sequentially from the grip on the deeper side. As a result, there is no stress concentration on the fixing body, the occurrence of minute cracks is prevented, and the fixing body does not break. This prevents the tensile steel from corroding due to the action of underground water or harmful gases. On the other hand, since the tensile force applied to one grip is reduced to one-fold by the number of grips, sufficient tension can be applied even if the strength of the concrete is low, and the volume of the anchoring body can be reduced.
その上、引張鋼材にアンボンド加工し、グリップ及びク
ッションパツキンを止水シースで保護しているので、引
張鋼材を地下水や有害ガス等から半永久的に保護するこ
とができ、アンカーとしての信頼性を飛ｆｉｌ的に向上
させることができる。Furthermore, the tensile steel material is unbonded and the grip and cushion seal are protected with a waterproof sheath, so the tensile steel material can be semi-permanently protected from underground water and harmful gases, improving its reliability as an anchor. fil-wise.
図面は本発明のアンカー引張鋼材の実施例を示し、第１
図はアンカーを造成した状態の側面図。
第２図は第１図のＡ−Ａ断面図、第３図はＢ−Ｂ断面図
、第４図はＣ−Ｃ断面図、第５図は引張鋼材の最浅部の
グリップ部軸方向断面図、第６図は引張鋼材の最深部の
グリップ部軸方向断面図、第７図は他の実施例のグリッ
プ部軸方向断面図である。
ｌ：引張鋼材 ２：コンプレッショングリップ ３
：クッションパツキン ４：止水シース ５ニスペ
ーサ−６＝定着体
１０：引張材ユニット １１：アンカーホール １
３ ： ＭＣナイロンキャップ １４：テーピングThe drawings show an embodiment of the anchor tensile steel material of the present invention, and the first
The figure is a side view of the anchor that has been constructed. Figure 2 is a sectional view taken along the line A-A in Figure 1, Figure 3 is a sectional view taken along B-B, Figure 4 is a sectional view taken along C-C, and Figure 5 is an axial cross-section of the grip at the shallowest part of the tensile steel material. 6 is an axial sectional view of the grip portion at the deepest part of the tensile steel material, and FIG. 7 is an axial sectional view of the grip portion of another embodiment. l: Tensile steel material 2: Compression grip 3
: Cushion packing 4: Water-stop sheath 5 Varnish spacer-6 = Anchor body 10: Tensile material unit 11: Anchor hole 1
3: MC nylon cap 14: Taping
Claims (1)
し、張力作用時の引張鋼材の伸びによるグリップの移動
量に合せてその厚さを変えたクッションパッキンをグリ
ップの応力側端部に取り付け、該グリップ及びクッショ
ンパッキンを止水シースで被覆してなることを特徴とす
るアンカー引張材。A plurality of grips are fixed to the coated tensile steel material at appropriate intervals, and a cushion packing whose thickness is changed according to the amount of movement of the grip due to the elongation of the tensile steel material when tension is applied is attached to the stress side end of the grip. An anchor tension material characterized in that the grip and the cushion packing are covered with a waterproof sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63184593A JPH0772418B2 (en) | 1988-07-26 | 1988-07-26 | Anchor tension material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63184593A JPH0772418B2 (en) | 1988-07-26 | 1988-07-26 | Anchor tension material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0270821A true JPH0270821A (en) | 1990-03-09 |
| JPH0772418B2 JPH0772418B2 (en) | 1995-08-02 |
Family
ID=16155922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63184593A Expired - Fee Related JPH0772418B2 (en) | 1988-07-26 | 1988-07-26 | Anchor tension material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0772418B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03115136U (en) * | 1990-03-05 | 1991-11-27 | ||
| JPH03287914A (en) * | 1990-04-04 | 1991-12-18 | Yoshikatsu Osawa | Structure of anchor |
| JPH0460014A (en) * | 1990-06-28 | 1992-02-26 | Kowa Sangyo Kk | Ground anchor method |
| JPH0433736U (en) * | 1990-07-10 | 1992-03-19 | ||
| JP2007063910A (en) * | 2005-09-01 | 2007-03-15 | Railway Technical Res Inst | Deviation preventive guard of crosstie and crosstie with deviation preventive guard |
| JP2015206220A (en) * | 2014-04-22 | 2015-11-19 | ジェイアール東日本コンサルタンツ株式会社 | anchor structure |
| CN108360388A (en) * | 2018-04-11 | 2018-08-03 | 江苏法尔胜缆索有限公司 | A kind of steel strand wires pre-tighten tensioning equipment and technique |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61117324A (en) * | 1984-11-12 | 1986-06-04 | Kajima Corp | Earth anchor |
-
1988
- 1988-07-26 JP JP63184593A patent/JPH0772418B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61117324A (en) * | 1984-11-12 | 1986-06-04 | Kajima Corp | Earth anchor |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03115136U (en) * | 1990-03-05 | 1991-11-27 | ||
| JPH03287914A (en) * | 1990-04-04 | 1991-12-18 | Yoshikatsu Osawa | Structure of anchor |
| JPH0460014A (en) * | 1990-06-28 | 1992-02-26 | Kowa Sangyo Kk | Ground anchor method |
| JPH0472009B2 (en) * | 1990-06-28 | 1992-11-17 | Kowa Sangyo | |
| JPH0433736U (en) * | 1990-07-10 | 1992-03-19 | ||
| JPH0714424Y2 (en) * | 1990-07-10 | 1995-04-10 | 建設基礎エンジニアリング株式会社 | anchor |
| JP2007063910A (en) * | 2005-09-01 | 2007-03-15 | Railway Technical Res Inst | Deviation preventive guard of crosstie and crosstie with deviation preventive guard |
| JP4549262B2 (en) * | 2005-09-01 | 2010-09-22 | 財団法人鉄道総合技術研究所 | Ladder sleeper with escape guard |
| JP2015206220A (en) * | 2014-04-22 | 2015-11-19 | ジェイアール東日本コンサルタンツ株式会社 | anchor structure |
| CN108360388A (en) * | 2018-04-11 | 2018-08-03 | 江苏法尔胜缆索有限公司 | A kind of steel strand wires pre-tighten tensioning equipment and technique |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0772418B2 (en) | 1995-08-02 |
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