JPS611706A - Anchoring of tensile material - Google Patents
Anchoring of tensile materialInfo
- Publication number
- JPS611706A JPS611706A JP12057084A JP12057084A JPS611706A JP S611706 A JPS611706 A JP S611706A JP 12057084 A JP12057084 A JP 12057084A JP 12057084 A JP12057084 A JP 12057084A JP S611706 A JPS611706 A JP S611706A
- Authority
- JP
- Japan
- Prior art keywords
- socket
- tension
- weight
- parts
- cement
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims description 122
- 238000004873 anchoring Methods 0.000 title description 2
- 239000000945 filler Substances 0.000 claims description 38
- 210000002435 tendon Anatomy 0.000 claims description 35
- 239000004568 cement Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000001603 reducing effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical class [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical class O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical class NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
□ この発明は緊張材の定着方法に関するものであるＯ
この発明が解決すべき問題点
従来、斜張橋、無線鉄塔或いはペンダントライン等にお
いて使用する緊張材は端部をアンカーヘッドを固定した
筒状のソケット内に挿通し、アンカーヘッドにくさび或
いは圧縮マンション等によって端部加工を行い係止した
後、エポキシ樹脂等□のソケットフィラー材を注入して
硬化或いは養生せしめて定着し、以って定着ソケット口
元における緊張材の繰返し引張シ応力による疲労破壊を
緩和するべく処置が施されていた。[Detailed description of the invention] Industrial field of application □ This invention relates to a method for fixing tension members. Problems to be solved by this invention Conventionally, tension members used in cable-stayed bridges, wireless towers, pendant lines, etc. Insert the end of the material into the cylindrical socket to which the anchor head is fixed, process the end with a wedge or compressed condom, etc., and lock the end, then inject socket filler material such as epoxy resin. Measures have been taken to fix the tension material by hardening or curing it, thereby alleviating fatigue failure caused by repeated tensile stress of the tension material at the opening of the fixing socket.
しかしこのよう・なエポキシ樹脂等のソケットフィラー
材には温度管理上極めて難し・い問題があった。すなわ
ち冬期のような低温時においては適当なワーカビリティ
ーが得られるような保温（即ち少なくとも２０℃程度が
必要）が施工管理上必要であシ、又高温時においては硬
化速度を遅延せしめるような温度管理が必要である。However, such socket filler materials such as epoxy resins have extremely difficult problems in terms of temperature control. In other words, at low temperatures such as winter, it is necessary to keep the temperature at a temperature of at least 20°C to ensure adequate workability, and at high temperatures, temperature control is necessary to slow down the curing speed. is necessary.
更に上記のような定着方法のもう一方の問題は緊張材を
緊張する以前にソケット内にソケットフィラー材を充填
して緊張材外周にソケットフィラー材を接着して定着せ
しめた場合、その後緊張材を緊張した時、緊張材端部の
ソケット内に位置せしめた部分にも伸びが生じようとす
る現象によって緊張材とその外周のソケットフィラー材
間の接着が切れてしまい緊張材口元の耐疲労性向上に対
して有効な定着が妨げられるという欠点を有している。Furthermore, another problem with the above-mentioned fixing method is that if the socket filler material is filled into the socket before tensioning the tendon and the socket filler material is adhered and fixed around the outer periphery of the tendon, then the tendon cannot be applied afterward. When tension is applied, the part of the end of the tendon located inside the socket tends to stretch as well, which breaks the bond between the tendon and the socket filler material on its outer periphery, improving fatigue resistance at the mouth of the tendon. This has the disadvantage that effective fixing is hindered.
従ってこのような緊張材であれば端部にかかる荷重をソ
ケットフィラー材によって充分に支持することが不可能
となシ、その結果として緊張材の定着ソケット口元にお
ける疲労を軽減する能力を低下せしめるものである。Therefore, with such tendons, it is impossible for the socket filler material to sufficiently support the load applied to the ends, and as a result, the ability of the tendons to reduce fatigue at the mouth of the anchoring socket is reduced. It is.
更に現在一般的に使用されているソケットフィラー材は
樹脂系硬化材が多いが、これは応力度レベルが高い状態
で使用された場合クリープ破壊が発生することが既に公
知となっているので技術的な問題が残っている。Furthermore, most of the socket filler materials currently in common use are resin-based hardening materials, but it is already known that creep rupture occurs when used under high stress levels, so there are technical issues. Problems remain.
発明の目的
仁の発明は以上のような欠点を改善するためになされた
もので、温度に多少の高低があっても極めて良好にソケ
ットフィラー材を硬化せしめることが可能な緊張材の定
着方法を提供するものであるＯ。Purpose of the Invention Jin's invention was made in order to improve the above-mentioned drawbacks, and provides a method for fixing tension material that can cure the socket filler material extremely well even if the temperature varies to some extent. O which is provided.
更にこの発明拡緊張材とその外周のソケットフィラー材
があらゆる荷重下に於いても常時密着しソケットフィラ
ー材によって緊張材にかかる荷重を有効に支持し、緊張
材の疲労軽減の機能を有効に果せしめることが可能な緊
張材の定着方法を提供することを目的とする。Furthermore, the expansion tension material of this invention and the socket filler material on its outer periphery are always in close contact even under any load, and the socket filler material effectively supports the load applied to the tension material, effectively achieving the function of reducing fatigue of the tension material. It is an object of the present invention to provide a method for fixing tendons that can be fixed.
発明の構成
この発明にかかる緊張材の定着方法は、ソケットフィラ
ー材としてセメント１００重量部に対し平均粒径１μ以
下の超微粉を１０〜５０重量部、高性能減水剤を２〜１
０重量部配合し、水セメント比０．３以下で混練し、細
骨材を混合したセメント系硬化材を使用することによっ
て上記の目的を達成するものである。ここでいう細骨材
としては鋼球、微細に粉砕された亜鉛等が使用できる。Structure of the Invention The method for fixing tendons according to the present invention comprises adding 10 to 50 parts by weight of ultrafine powder with an average particle size of 1 μ or less and 2 to 1 part by weight of a high performance water reducing agent to 100 parts by weight of cement as a socket filler material.
The above object is achieved by using a cement-based hardening material containing 0 parts by weight, kneaded at a water-cement ratio of 0.3 or less, and mixed with fine aggregate. As the fine aggregate mentioned here, steel balls, finely ground zinc, etc. can be used.
また他の発明は緊張材に緊張力を与えた後ソケットアイ
２−材を充填して、硬化、養生せしめることによって上
記の目的を達成するものである。Another invention achieves the above object by applying tension to the tendon material, filling it with socket eye material 2, and allowing it to harden and cure.
実施例
以下、図に示す実施例に基づきこの発明の詳細な説明す
る。EXAMPLES Hereinafter, the present invention will be explained in detail based on examples shown in the drawings.
第１図に示す実施例拡現場に運び込んで架は渡す以前に
工場等にてこの発明にかかる緊張材の定着方法を実施し
た場合である。The embodiment shown in FIG. 1 is a case in which the tension material fixing method according to the present invention is carried out in a factory or the like before the racks are delivered to an expansion site.
図において１はＰＣ鋼線、ＰＣ鋼よシ線、鋼線、亜鉛め
２き鋼線、ワイヤロープ等の緊張材であシ該緊張材１は
ソケット２内に挿通せしめられてアンカーヘッド３に係
止せしめられている。ソケット２は円筒状であって一端
の内径が他端の内径よシ大きく形成されて内周面がテー
パ状に形成されているか、或いは両端が同径の同筒形状
であってもよい。ソケット２の一端部には円盤状のアン
カーヘッド３が隣接配置されている。アンカーヘッド３
には適宜数の緊張材挿通孔３１が穿設されていて、緊張
材ｌが挿通せしめられている。緊張材１はアンカーヘッ
ド３のソケット２とは反対側にて端部に圧縮マンション
１ａが取付けられて係止せしめられている。In the figure, 1 is a tension material such as PC steel wire, PC steel wire, steel wire, galvanized steel wire, wire rope, etc. The tension material 1 is inserted into the socket 2 and attached to the anchor head 3. It is locked. The socket 2 may have a cylindrical shape, with the inner diameter at one end being larger than the inner diameter at the other end, and the inner peripheral surface may be formed in a tapered shape, or it may have the same cylindrical shape with both ends having the same diameter. A disk-shaped anchor head 3 is arranged adjacent to one end of the socket 2. anchor head 3
A suitable number of tendon insertion holes 31 are bored through the tension material through holes 31, through which the tendon material 1 is inserted. A compression condom 1a is attached to the end of the tension material 1 on the opposite side of the anchor head 3 from the socket 2, and is locked therein.
以上のように緊張材１が係止されたソケット２が矢倉状
の緊張用架台４上に載置せしめられている。緊張用架台
４の上部台４２上中央には孔４１が形成されておシ、該
孔４１を挿通せしめられて緊張材１が垂下せしめられて
いる。As described above, the socket 2 to which the tension material 1 is locked is placed on the arrow-shaped tension frame 4. A hole 41 is formed in the center of the upper base 42 of the tension frame 4, and the tension member 1 is inserted through the hole 41 and hangs down.
緊張材１は同じく上部台４２下面に固定された双胴ジヤ
ツキ５のピストン５、５１間に掛は渡されたアーム５２
に設けられた固定具５３にょシ固定されている。該双胴
ジヤツキ５の直下においては第２図に示すような全緊張
材ｌを把持するクランパ６がボルトナツトにょシ固定さ
れている。The tension material 1 is an arm 52 which is passed between the pistons 5 and 51 of a double-barreled jack 5 which is also fixed to the lower surface of the upper table 42.
It is fixed to a fixture 53 provided in the. Immediately below the double-barrel jack 5, a clamper 6 for gripping the entire tension material 1 as shown in FIG. 2 is fixed with bolts and nuts.
以上のような状態にて双胴ジヤツキ５を作動せしめて緊
張材１を緊張する。すなわちポンプＰがら圧油を供給し
てジヤツキ５のピストン５１を下方に移動せしめてアー
ム５２を介して更に下方に移動せしめ、全緊張材１を下
方に牽引して緊張せしめる。実施例において緊張材１に
与える緊張力は緊張材１の破断強度の１０％〜６０％で
ある。In the above state, the twin-barrel jack 5 is operated to tension the tension material 1. That is, pressurized oil is supplied from the pump P to move the piston 51 of the jack 5 downward and further downward via the arm 52, thereby pulling the entire tension material 1 downward and tensioning it. In the example, the tension force applied to the tendon material 1 is 10% to 60% of the breaking strength of the tendon material 1.
以上のように緊張材１を緊張せしめた状態においてソケ
ット２内にソケットアイ２−材７を充填し、緊張材ｌ外
周に充満せしめる。ソケットフィラー材７としては、セ
メン）１００重量部に対し平均粒径１μ以下の超微粉を
１０〜５０重量部、高性能減水剤を２〜１０重量部配合
し、水セメント比０．３以下で混練し、細骨材を混合し
たセメント系硬化材を使用する。With the tendon material 1 tensioned as described above, the socket eye 2-material 7 is filled into the socket 2 to fill the outer periphery of the tendon material 1. As the socket filler material 7, 10 to 50 parts by weight of ultrafine powder with an average particle size of 1 μ or less and 2 to 10 parts by weight of a high performance water reducing agent are mixed with 100 parts by weight of cement, and the water-to-cement ratio is 0.3 or less. Use cement-based hardening material that has been kneaded and mixed with fine aggregate.
超微粉としては、シリコンまたはシリカヒユームが特に
好適であシ、その他フライアッシュ、炭酸カルシウム、
シリカゲル、酸化チタン、酸化アルミニウム等の水溶性
の低い超微粉が使用できる。Silicon or silica hume is particularly suitable as the ultrafine powder, and other materials such as fly ash, calcium carbonate,
Ultrafine powders with low water solubility such as silica gel, titanium oxide, and aluminum oxide can be used.
超微粉はそのままであれば体積が大きく、あらかじめ工
場等で水と、或りは水及び高性能減水剤と混練してスラ
リー化したものを使用することが好適である。Ultrafine powder has a large volume if it is used as it is, so it is preferable to use a slurry that has been kneaded with water or water and a high-performance water reducing agent in a factory or the like in advance.
超微粉の使用量はセメント１００重量部に対し５０重量
部を超えると混線物の流動性が著しく低下し成形するこ
とが困難とな）、かつ強度発現も不充分となる。If the amount of ultrafine powder used exceeds 50 parts by weight per 100 parts by weight of cement, the fluidity of the mixed material will be significantly reduced, making it difficult to mold), and the strength will also be insufficient.
高性能減水剤としては、メラミンスルホン酸ホルムアル
デヒド縮合物の塩、ナフタレンスルホン酸ホルムアルデ
ヒド縮合物の塩、高分子リグニンスルホン酸塩、ポルカ
ルボン酸塩などを主成分とするものが挙げられる。Examples of high-performance water reducing agents include those containing as main components salts of melamine sulfonic acid formaldehyde condensates, salts of naphthalene sulfonic acid formaldehyde condensates, polymeric lignin sulfonates, polycarboxylate salts, and the like.
高性能減水剤の標準使用量はセメントに対して０．３〜
、０重量％であるが、この発明ではそれ以上添加するこ
とが好ましく、セメント１００重量部に対し２〜ｌＯ重
量部である。高性能減水剤は混線物を低水セメント比で
得るためには不可欠であシ、１０重量部よシ多いと減水
効果が添加盆の増大に伴わなくなシ、かえって硬化に悪
影響を与える。The standard usage amount of high performance water reducing agent is 0.3~ for cement.
, 0% by weight, but in the present invention it is preferable to add more than 2 to 10 parts by weight per 100 parts by weight of cement. A high performance water reducing agent is indispensable in order to obtain a mixed material with a low water-to-cement ratio, and if the amount exceeds 10 parts by weight, the water reducing effect will not be accompanied by an increase in the amount of additive, and will instead have a negative effect on hardening.
さらに高い強度が必要な場合、前記組成に、セメント１
００重量部に対して、硫酸カルシウムの二水塩、または
無水塩の内少なくともｉｌｌを１〜２０重量部添加して
もよい。If even higher strength is required, add 1 part of cement to the above composition.
00 parts by weight, at least 1 to 20 parts by weight of calcium sulfate dihydrate or anhydrous salt may be added.
細骨材としては鋼球、微細に粉砕した亜鉛等が使用可能
である。細骨材は、セメント、超微粉、高性能減水剤、
水を混練してスラリー化したものを予めソケット２内に
充填しておき、その後ソケット２に振動を与えながら投
入するもので、ソケット２底部に容易に沈む鋼球が特に
好ましい。但し、細骨材を先に投入しておき、後にセメ
ント等をスラリー化したものをソケット２に振動を与え
ながら充填してもよい。As the fine aggregate, steel balls, finely ground zinc, etc. can be used. Fine aggregates include cement, ultrafine powder, high performance water reducer,
A slurry made by kneading water is filled in the socket 2 in advance, and then it is introduced into the socket 2 while being vibrated, and steel balls that easily sink into the bottom of the socket 2 are particularly preferable. However, the fine aggregate may be introduced first, and then a slurry of cement or the like may be filled into the socket 2 while being vibrated.
ソケットフィラー材７が硬化、或いは養生を終えた後緊
張を解除する。緊張を解除したときソケット２内の緊張
材１の伸びが元の状態に復帰しようとす−るが、そのと
きソケットフィラー材７が緊張材１に追随して圧縮され
る。従ってソケットフィラー材７にはプレストレス力が
かかシ、プレストレストソケットフィラー材となる。After the socket filler material 7 is cured or cured, the tension is released. When the tension is released, the tension material 1 within the socket 2 attempts to return to its original state, but at this time the socket filler material 7 follows the tension material 1 and is compressed. Therefore, the socket filler material 7 is subjected to a prestressing force and becomes a prestressed socket filler material.
以上のようにあらかじめ工場にて端部を定着した緊張材
１を現場に搬入して緊張する。As described above, the tension material 1 with its ends fixed in advance at the factory is transported to the site and tensioned.
緊張材１を架は渡し、端部を把持して緊張せしめる。緊
張材１は緊張とともに伸張するが、ソケット２内に位置
する緊張材１端部も伸張する。緊張材１端部の伸張とと
もに緊張材１外周に接着し圧縮されていたソケットフィ
ラー材７は緊張材ｌの伸びに追随して元の状態に復帰し
ようとする。The tension material 1 is passed over the rack, and the ends are gripped and tensioned. As the tendon 1 stretches with tension, the end of the tendon 1 located in the socket 2 also stretches. As the end portion of the tendon material 1 expands, the socket filler material 7, which has been adhered and compressed to the outer periphery of the tendon material 1, attempts to return to its original state following the expansion of the tendon material 1.
第３図のグラフは従来方法により定着を行った緊張材１
ｒと、この発明にかかる定着方法によシ定着を行った緊
張材１ｐに荷重をかけ、緊張材ｌｒ 、ｉｐとソケット
フィラー材７との相対移動を示すものである。従来方法
によシ定着した緊張材１ｒは荷重をかけて緊張した時点
において伸長するが、ソケットフィラー材７は緊張材１
ｒの伸びに追随していかず、緊張材１ｒとソケットフィ
ラー材７との相対移動は荷重をかければかける程大きく
なる。The graph in Figure 3 shows tension material 1 fixed using the conventional method.
The figure shows the relative movement between the tension material lr, ip, and the socket filler material 7 when a load is applied to the tension material 1p fixed by the fixing method according to the present invention. The tension material 1r fixed by the conventional method expands when a load is applied and tensioned, but the socket filler material 7
The relative movement between the tension material 1r and the socket filler material 7 increases as the load increases.
これに対し、この発明にかかる定着方法によシ定着を行
った緊張材１ｐに荷重をかけて緊張した場合、ソケット
フィラー材７にはプレストレス力がかけられて圧縮され
ているために緊張材１ｐの伸びに追随して元の状態に復
帰しようとする。以って緊張材１ｐとソケットフィラー
材７との相対移動は一定荷重Ｓに達するまで生じない。On the other hand, when the tension material 1p fixed by the fixing method according to the present invention is tensed by applying a load, the tension material 1p is compressed due to the prestress force applied to the socket filler material 7. It attempts to return to its original state following the growth of 1p. Therefore, relative movement between the tension material 1p and the socket filler material 7 does not occur until the constant load S is reached.
荷重が一定荷重Ｓ（すなわち緊張材１ｐを工場にて緊張
し、定着した時点において緊張材１ｐにかけた荷重）に
達した時点においてソケットフィラー材７が緊張材１ｐ
の伸びに追随して行かなくなシソケラトフィラー材７と
緊張材ｉｐ、！：′の相対移動が生じ始め、荷重が大き
くなるにつれて相対移動も大きく″なることになる。When the load reaches a constant load S (that is, the load applied to the tendon 1p when the tendon 1p is tensioned at the factory and fixed), the socket filler material 7
Shisokerat filler material 7 and tension material ip, which will not follow the growth of! A relative movement of :' begins to occur, and as the load increases, the relative movement also increases.
従って緊張材１が斜張橋、無線鉄塔、ペンダントライン
等に使用された場合に緊張材１にかかる荷重を予測して
荷重Ｓを設□定しておけば、緊張材１とソケットフィラ
ー材７との相対移動が全く生じないか、或いは極めて小
さくて済むこととなシソケラトフィラー材７が緊張材１
外周から離れようとする力が生ぜず、緊゛張材１とソケ
ットフィラー材７との接着が切れることがない。Therefore, if the load S is set by predicting the load that will be applied to the tendon 1 when the tendon 1 is used in a cable-stayed bridge, wireless tower, pendant line, etc., then the tension material 1 and the socket filler material 7 can be The shisokerato filler material 7 has no relative movement with the tendon material 1, or only a small amount of movement occurs.
No force is generated to separate from the outer periphery, and the bond between the tensioning material 1 and the socket filler material 7 does not break.
次にこの発明にかかる緊張材の定着方法を現場において
実施した場合につき説明する。Next, the case where the tension material fixing method according to the present invention is carried out on site will be explained.
実施例は斜張橋において緊張材１複数本をシース８内に
挿通した斜材りについてこの発明を実施したものである
。In this embodiment, the present invention is applied to a cable-stayed bridge in which one or more tendons are inserted into a sheath 8.
第３図において斜材りはタワーＴとデツキ０間に架は渡
されている。In FIG. 3, the diagonal beam is placed between tower T and deck 0.
タワーＴとデツキＤには相対向して定着孔９゜９が各々
穿設されておシ、該定着孔９，９の相対向側と反対側に
ソケット２，２が各々位置せしめ。Fixing holes 9.9 are formed in the tower T and deck D, respectively, facing each other, and sockets 2, 2 are located on opposite sides of the fixing holes 9, 9, respectively.
られている。該ソケット２，２の端□部に紘各々アンカ
ーヘッド３，３が固定されている。ソケット２．２の端
部間には合成樹脂製等の円筒状のシース８をまず架は渡
す。It is being Anchor heads 3, 3 are fixed to the ends of the sockets 2, 2, respectively. A cylindrical sheath 8 made of synthetic resin or the like is first passed between the ends of the socket 2.2.
該シース８内に緊張材１を順次挿通してシース８内にて
緊張する。緊張材１はタワーＴ側のソケット２に固定し
たアンカーヘッド３の緊張材挿通孔３１を挿通せしめシ
ース９内周面を伝わせてデツキＤ側のソケッ□ト２まで
降下せしめ、アンカーヘッド３の相対応する緊張材挿通
孔３１を挿通せしめて順次緊張する。The tension material 1 is sequentially inserted into the sheath 8 and tensioned within the sheath 8. The tension member 1 is inserted through the tension member insertion hole 31 of the anchor head 3 fixed to the socket 2 on the tower T side, and is lowered to the socket □ on the deck D side through the inner peripheral surface of the sheath 9. The corresponding tensioning material insertion holes 31 are inserted and tensioned sequentially.
アンカーヘッド３′の緊張材挿通孔３１に挿通する順序
は様々な態様が考えられるが、例えば第６図に示すアン
カーヘッド３の緊張材挿通孔３“１のうち最上部に位置
する挿通孔ａｉａから緊張材１を挿通せしめて緊張し、
灰はその下方の挿通孔３１ｂに挿通し、その後順茨下方
の挿通孔３１ｃ。Various modes can be considered for the order in which the tendons are inserted into the tendon insertion holes 31 of the anchor head 3'. Insert the tension material 1 through and tighten it,
The ash is inserted into the lower insertion hole 31b, and then the thorn is inserted into the lower insertion hole 31c.
３１ｄ・・・３１ｊに挿通せしめて緊張していけば緊張
材１は上方から張設されていくため上方の緊張材１と下
方の緊張材ｌがからみつくことかない０
緊張材１はタワーＴ側のソケット２においては圧縮マン
ション１ａによってアンカーヘッド３に係止し、デツキ
Ｄ側のソケット２においてはくさθ１ｂＫよって係止せ
しめられている。 □□以上のごとく全緊張材挿
通孔３１竺・・・３１ｊｋ緊張材１を挿通して各＾緊張
した後全緊張材１を緊張する。31d...31j are inserted and tensioned, the tension material 1 will be stretched from above, so the upper tension material 1 and the lower tension material 1 will not become entangled.0 The tension material 1 is on the tower T side The socket 2 is locked to the anchor head 3 by the compression condom 1a, and the socket 2 on the deck D side is locked by the hook θ1bK. □□As described above, all the tension materials 1 are inserted through the tension material insertion holes 31...31jk and each tension material 1 is tensioned, and then all the tension materials 1 are tensioned.
次にソケット２，２内にソケットフィラー材７を充填し
て硬化せしめ緊張材１の定着を完了する。Next, the socket filler material 7 is filled into the sockets 2, 2 and hardened to complete fixing of the tendon material 1.
圧縮マンション１ａ、くさび１′ｂ、その他ボタンヘッ
ドによって緊張材ｌをアンカーヘッド３に係止するが、
圧縮マンション１ａ等は主として施ヱ時においてかかる
デツキＤの重量等の死荷重を支えるもので、ソケットフ
ィラー材′７祉主として゛□施ヱ後において力ｉる車馬
類および風圧等め活荷＊を支えるもめである。The tension member 1 is secured to the anchor head 3 using the compression condom 1a, the wedge 1'b, and other button heads.
Compression condominiums 1a, etc. mainly support dead loads such as the weight of deck D during installation, and socket filler material'7 mainly supports live loads such as vehicles, horses, wind pressure, etc. after installation. *This is a conflict that supports the *.
作用
との発明は以上めような構成を有するが（既述□のよう
なソケットフィラー材を使用した場合、添１附別紙の表
に宗疹如〈従来の樹脂系フィラー材に比べて極めて太き
ガ強度を発揮した。該実験結果 □□は作業時に
おいて約２０℃の温度を維持した場合であるが、エポキ
シ系硬化材は１５℃以下において硬化速度が遅く、★た
２０℃を超えると硬化速度が傘＜、極めて作業性が悪か
った。これに対し本発−にて使用するセメント系硬化材
は５〜４０℃の範囲ならば温度曽理の必要もなく、略同
様に良好門作業性が得られた。Although the invention with the function has the above-mentioned structure, (when using the socket filler material as mentioned above, the table in the attached sheet of Attachment 1 shows that it is extremely thick compared to conventional resin-based filler materials. The experimental results □□ are for the case where the temperature was maintained at approximately 20℃ during operation, but the curing speed of epoxy hardening materials is slow at temperatures below 15℃, and when the temperature exceeds 20℃. The curing speed was below average, and the workability was extremely poor.On the other hand, the cement-based hardening material used in this project does not require temperature cooling in the range of 5 to 40°C, and has almost the same good workability. I got sex.
クリープの発生状況を第７図のグラフにて示す。The occurrence of creep is shown in the graph of FIG.
実験では直径１５．２１１のＰＣストランドを使用し、
ソケット内□にてストランド端部を４０ｃｍ定着し、材
令７日後荷重１０ｔｏｎまで急速荷重してその後１００
０時間保ｍした場合である。２ｐは本発明のセメント系
硬化材を使用して、定着時に緊張してあらかじめプレス
トレスを与えた場合であ、９．２ｒは従来のエポキシ系
硬化材を使用してプレストレスを与えずに定着した場合
である。セメント系硬化材の場合圧縮強度は１８００
Ｋｐ／ｍ 。In the experiment, a PC strand with a diameter of 15.211 was used.
The end of the strand was fixed for 40 cm in the socket □, and after 7 days of age, it was rapidly loaded to a load of 10 tons, and then
This is the case where the temperature was maintained for 0 hours. 2p is the case where the cement-based hardening material of the present invention is used and pre-stress is applied during fixing, and 9.2r is the case where the conventional epoxy-based hardening material is used and the fixing is performed without applying pre-stress. This is the case. For cement-based hardened materials, the compressive strength is 1800
Kp/m.
エポキシ系樹脂の場合１０００ ＫＰ／ｍであった。In the case of epoxy resin, it was 1000 KP/m.
２ｐの場合初期のクリープ発生が＃１とんどで長期的に
発生していない。２ｒにおいては長期的に発生してスト
ランドがソケットから抜は出る危険性を感じた。ｃｒは
クリープ量を示す。 ４゜また本発明にて使用
するセメント系硬化材は加圧高温度、養生を行った場合
、更、に大きな圧縮強度を得られた。In the case of 2p, initial creep did not occur in the long term for most of #1. In 2R, I felt that there was a risk that this would occur over a long period of time and the strand would come out of the socket. cr indicates the amount of creep. 4. Furthermore, when the cement-based hardening material used in the present invention was subjected to pressure, high temperature, and curing, even greater compressive strength was obtained.
発明の効果
この発明は以上のような構成を有し、多少の温度高低に
よっても硬化速度の変化がなく、クリープの発生もなく
、極めて良好に緊張材を定着することができる。Effects of the Invention The present invention has the above-described configuration, and can fix tension material extremely well without changing the curing speed even when the temperature is slightly high or low, without causing creep.
また他の発明は緊張材を緊張状態にてソケットフィラー
材を充填して硬化或いは養生せしめるため、緊張材とソ
ケットフィラー材との接着が切れることがなく、ソケッ
トフィラー材が緊張材にかかる荷重を常時支持し、緊張
材の疲労軽減の機能を有効に果せしめる。この発明にて
セメント系硬化材をソケットフィラー材として使用する
場合、該フィラー材はクリープの発生が低いものであシ
、既述のようにプレストレスをあらかじめ与え七いた効
果とあいまってケーブルの疲労性は著しく改善される。In another invention, the tension material is filled with socket filler material under tension and allowed to harden or cure, so that the bond between the tension material and the socket filler material does not break, and the socket filler material absorbs the load applied to the tension material. It provides constant support and effectively fulfills the function of reducing fatigue of tendons. When a cement-based hardening material is used as a socket filler material in this invention, the filler material must have a low creep occurrence, and in combination with the effect of pre-stressing as described above, cable fatigue sex is significantly improved.
第１図はこの発明の一実施例の側面図、第２図はＡ−Ａ
＃Ｉ断面図、第３図は緊張材に荷重をかけた場合のグラ
フ、第４図は斜張橋の側面図、第５図は斜張橋の斜材の
緊張にこの発明を実施した場合の要部縦断面図、第６図
はアンカーヘッドの正面図、第７図はクリープの発生量
を示すグラフである。
１・・緊張材、２・・ソケット、
３・アンカーヘツド、４・・緊張用架台、５・・センタ
ーホールジヤツキ、６・・クランパ、７・・ソケットフ
ィシ−材、８・・シース、９・・定着孔、３１・・緊張
材挿通孔。
第１図
１ａ
第２図
第６図
ｊ１７ 図
楚イ立量 （ｍｍ）
手続補正書
昭和５９年７月２４日
昭和５９年 特 願第１２０５７０ 号２、発 明
の名称 ゛・ ゛
緊張材の定着′壇、幀９９．
３、補正をする者 ゛−ピ゛・ −事件との
関係 特許出願人。
４、代 理 人
・５、補正命令の日付 自発補正
８、補正の内容 別紙の通り図面第７図を補正する
。
！Ｊ７図
、 、 変 イｆｒｉ（ｍｍ）
、胃
手続補正書
、事件の表示
昭和５９年特許願第 １２０５７０ 号２、発明の名
称
緊張材の定着方法
３、補正をする者
事件との関係 給許出願人
住所
建設基礎エンジニアリング株式会社
氏名
４、代理人
氏名 東京都港区赤坂６丁目５番２１号シャドー赤坂電
話（５８６） ８７４１
６、補正により増加する発明の数
第 ７ 図Fig. 1 is a side view of one embodiment of the invention, and Fig. 2 is A-A.
#I sectional view, Figure 3 is a graph when a load is applied to the tension members, Figure 4 is a side view of a cable-stayed bridge, and Figure 5 is a case where the present invention is applied to the tension of the cable members of a cable-stayed bridge. 6 is a front view of the anchor head, and FIG. 7 is a graph showing the amount of creep generated. 1. Tension material, 2. Socket, 3. Anchor head, 4. Tension stand, 5. Center hole jack, 6. Clamper, 7. Socket fiber material, 8. Sheath, 9. -Fixing hole, 31...Tension material insertion hole. Fig. 1 1a Fig. 2 Fig. 6 j17 Fig. A. Standing amount (mm) Procedural amendment July 24, 1980 Patent Application No. 120570 2, Title of invention ゛・゛Fixing of tension material 'dan, 99. 3. Person making the amendment: Relationship to the case: Patent applicant. 4. Agent
・5. Date of amendment order Voluntary amendment 8. Contents of amendment Figure 7 of the drawing will be amended as shown in the attached sheet. ! J7 figure, , change ifri (mm)
, Written amendment to the procedure, Indication of the case Patent Application No. 120570 of 1982 2, Name of the invention Method for fixing tendons 3, Relationship with the case by the person making the amendment Grant applicant Address Kensetsu Basic Engineering Co., Ltd. Name 4, Name of Agent: Shadow Akasaka Telephone, 6-5-21 Akasaka, Minato-ku, Tokyo (586) 8741 6. Number of inventions increased by amendment Figure 7
Claims (2)
に緊張材を挿通し、該緊張材をアンカーヘツドに係止し
た後、前記ソケツト内にセメント１００重量部に対し、
平均粒径１μ以下の超微粉を１０〜５０重量部、高性能
減水剤を２〜１０重量部配合し、水セメント比０．３以
下で混練し、細骨材を混合したセメント系硬化材からな
るソケツトフイラー材を充填して硬化或いは養生せしめ
ることを特徴とする緊張材の定着方法。(1) After inserting a tendon into a cylindrical socket having an anchor head at the end and locking the tendon to the anchor head, add 100 parts by weight of cement into the socket.
From a cement-based hardening material containing 10 to 50 parts by weight of ultrafine powder with an average particle size of 1μ or less, 2 to 10 parts by weight of a high-performance water reducer, kneaded at a water-cement ratio of 0.3 or less, and mixed with fine aggregate. 1. A method for fixing tension material, which comprises filling a socket filler material and allowing it to harden or cure.
に緊張材を挿通し、該緊張材をアンカーヘツドに係止し
た後緊張せしめ、緊張状態にて前記ソケツト内にセメン
ト１００重量部に対し、平均粒径１μ以下の超微粉を１
０〜５０重量部、高性能減水剤を２〜１０重量部配合し
、水セメント比０．３以下で混練し、細骨材を混合した
セメント系硬化材からなるソケツトフイラー材を充填し
て硬化或いは養生せしめることを特徴とする緊張材の定
着方法。(2) Insert a tensioning material into a cylindrical socket having an anchor head at the end, tighten the tensioning material after locking it to the anchor head, and add 100 parts by weight of cement into the socket in the tensioned state. , ultrafine powder with an average particle size of 1μ or less
0 to 50 parts by weight and 2 to 10 parts by weight of a high-performance water reducing agent, kneaded at a water-cement ratio of 0.3 or less, filled with a socket filler material consisting of a cementitious hardening material mixed with fine aggregate, and hardened or A method for fixing tension material, which is characterized by curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12057084A JPS611706A (en) | 1984-06-12 | 1984-06-12 | Anchoring of tensile material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12057084A JPS611706A (en) | 1984-06-12 | 1984-06-12 | Anchoring of tensile material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS611706A true JPS611706A (en) | 1986-01-07 |
Family
ID=14789567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12057084A Pending JPS611706A (en) | 1984-06-12 | 1984-06-12 | Anchoring of tensile material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS611706A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0562863U (en) * | 1992-01-31 | 1993-08-20 | サンコール株式会社 | Spring probe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5721605A (en) * | 1980-07-14 | 1982-02-04 | Niigata Iseki Seisakusho Kk | Load detector safety device for snow remover |
-
1984
- 1984-06-12 JP JP12057084A patent/JPS611706A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5721605A (en) * | 1980-07-14 | 1982-02-04 | Niigata Iseki Seisakusho Kk | Load detector safety device for snow remover |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0562863U (en) * | 1992-01-31 | 1993-08-20 | サンコール株式会社 | Spring probe |
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