JP3284547B2 - Water stopping structure of anchor structure - Google Patents
Water stopping structure of anchor structureInfo
- Publication number
- JP3284547B2 JP3284547B2 JP2000049642A JP2000049642A JP3284547B2 JP 3284547 B2 JP3284547 B2 JP 3284547B2 JP 2000049642 A JP2000049642 A JP 2000049642A JP 2000049642 A JP2000049642 A JP 2000049642A JP 3284547 B2 JP3284547 B2 JP 3284547B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- heat
- grout
- shrinkable tube
- anchor
- 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 - Lifetime
Links
Landscapes
- Piles And Underground Anchors (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、岩盤、法面等の
地崩れ防止、ダム、橋脚等のコンクリート構造物の安定
化を図るアンカー構造体の止水構造に関するものであ
る。特に、緊張材とグラウトとの付着により形成される
定着長部と、緊張材とグラウトとを付着させない自由長
部との境界部における止水構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stopping structure of an anchor structure for preventing landslides such as rocks and slopes and stabilizing concrete structures such as dams and piers. In particular, the present invention relates to a water stopping structure at a boundary between a fixing length portion formed by adhesion of a tendon and grout and a free length portion not adhering the tendon and grout.
【０００２】[0002]
【従来の技術】従来のアンカー構造体として、特開平11
-264135号公報に記載の技術が知られている。このアン
カー構造体は、アンカー設置孔の開口端に設けた定着具
でPC鋼より線の一端を固定し、アンカー設置孔とPC鋼よ
り線との間にグラウトを充填したものである。定着具側
のPC鋼より線の外周はシースに囲まれて、グラウトとの
付着を隔絶した自由長部が形成され、その反対側（他端
側）にはグラウトに付着されてPC鋼より線を固定する定
着長部が形成される。すなわち、PC鋼より線は、緊張さ
れた状態で、一端を定着具により、他端側を定着長部に
より固定される。2. Description of the Related Art A conventional anchor structure is disclosed in
The technique described in Japanese Patent Application Laid-Open No. 264135 is known. In this anchor structure, one end of a PC steel stranded wire is fixed with a fixing tool provided at an open end of an anchor installation hole, and grout is filled between the anchor installation hole and the PC steel stranded wire. The outer circumference of the PC steel stranded wire on the fixing device side is surrounded by a sheath to form a free length part that is isolated from the grout, and on the other side (the other end side) it is attached to the grout and the PC steel stranded wire Is formed to fix the fixing portion. That is, the PC steel strand is fixed in a tensioned state at one end by a fixing tool and at the other end by a fixing length.
【０００３】このようなアンカー構造体において、自由
長部のシース内にグラウトや水分が侵入しない様に定着
長部との境界部には止水処理が施されなければならな
い。この止水構造を図７に示す。[0003] In such an anchor structure, the boundary between the anchor portion and the fixing length portion must be subjected to a water stopping process so that grout and moisture do not enter the sheath of the free length portion. This water stop structure is shown in FIG.
【０００４】この止水構造は、自由長部と定着長部の境
界部、すなわちシース3端部からPC鋼より線1の外周にか
けての範囲を接着材4と熱収縮チューブ5とで覆った構造
である。熱収縮チューブの外周面は直接グラウト2と接
することになる。接着材4と熱収縮チューブ5を被覆させ
る手段としては、接着材4を境界部に塗布してから熱収
縮チューブ5を被せ、このチューブ5を加熱収縮させる方
法と、予め内周に熱軟化性の接着材が塗布された熱収縮
チューブ5を被せてから加熱収縮させる方法とがある。This waterproof structure has a structure in which the boundary between the free length portion and the fixing length portion, that is, the range from the end of the sheath 3 to the outer periphery of the PC steel strand 1 is covered with the adhesive 4 and the heat-shrinkable tube 5. It is. The outer peripheral surface of the heat-shrinkable tube comes into direct contact with the grout 2. As a means for coating the adhesive 4 and the heat-shrinkable tube 5, a method in which the adhesive 4 is applied to the boundary and then covered with the heat-shrinkable tube 5, and the tube 5 is heat-shrinked, There is a method in which the heat-shrinkable tube 5 coated with the adhesive is covered and then heat-shrinked.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記の止水構
造は、PC鋼より線を緊張したとき、止水機能が低下する
ことがある。その理由は次の通りである。However, in the above water-stop structure, the water-stop function may be deteriorated when the strand of PC steel is tightened. The reason is as follows.
【０００６】アンカー構造体の自由長部および定着長部
の外周にはグラウトが充填されている。また、止水のた
めに用いた熱収縮チューブの外周にもグラウトが充填さ
れた状態になっている。The outer periphery of the free length portion and the fixing length portion of the anchor structure is filled with grout. Further, the outer periphery of the heat-shrinkable tube used for stopping water is also filled with grout.
【０００７】このような止水構造においてPC鋼より線を
緊張すると、自由長部分のPC鋼より線に応力が伝達し、
自由長部と定着長部の境界部の方からグラウトに応力が
伝達される。このとき、境界部に近いグラウトの方から
付着力が切れる。これにより、境界部付近のPC鋼より線
が伸びようとする。In such a water-stop structure, when the strand of PC steel is tensioned, stress is transmitted to the strand of PC steel at the free length,
Stress is transmitted to the grout from the boundary between the free length and the fixing length. At this time, the adhesive force is cut off from the grout near the boundary. As a result, the wire tends to extend from the PC steel near the boundary.
【０００８】ところが、止水に用いる熱収縮チューブ
は、表面が直接加熱されて活性化され、グラウトとの付
着力が向上する。そのため、熱収縮チューブとグラウト
との接着力が、PC鋼より線と接着材との接着力または接
着材と熱収縮チューブ内周面との接着力よりも大きくな
ることがある。However, the surface of the heat-shrinkable tube used for stopping water is directly heated to be activated, and the adhesion to the grout is improved. Therefore, the adhesive strength between the heat-shrinkable tube and the grout may be larger than the adhesive strength between the PC steel strand and the adhesive or between the adhesive and the inner peripheral surface of the heat-shrinkable tube.
【０００９】その場合、PC鋼より線の緊張による伸びに
伴って、接着材そのものが変形したり、熱収縮チューブ
とPC鋼より線との間の接着力が低下したりして止水機能
が低下することがある。In this case, the adhesive itself is deformed with the elongation due to the tension of the PC steel strand, or the adhesive strength between the heat-shrinkable tube and the PC steel strand is reduced, so that the water stopping function is reduced. May drop.
【００１０】従って、本発明の主目的は、アンカー構造
体において、緊張材を緊張した際にも止水機能が低下す
ることのない止水構造を提供することにある。[0010] Accordingly, it is a main object of the present invention to provide a water stopping structure in which the water stopping function of the anchor structure does not deteriorate even when the tendon is tensioned.
【００１１】[0011]
【課題を解決するための手段】本発明は、熱収縮チュー
ブとグラウトとの間に絶縁層を設けることで上記の目的
を達成する。The present invention achieves the above object by providing an insulating layer between a heat-shrinkable tube and grout.
【００１２】すなわち、本発明止水構造は、アンカー設
置孔に挿入される緊張材と、緊張材をアンカー設置孔の
一端側で固定する定着具と、アンカー設置孔と緊張材と
の間に充填されるグラウトとを具える。この緊張材の一
端側にはグラウトと緊張材とを隔絶した自由長部が構成
され、他端側には緊張材をグラウトで定着した定着長部
が形成される。また、この自由長部と定着長部との境界
を覆う接着材と、接着材の外周を覆う熱収縮チューブと
を具える。そして、前記熱収縮チューブとグラウトとを
隔絶する絶縁層を具えることを特徴とする。That is, the waterproof structure according to the present invention comprises a tension member inserted into the anchor installation hole, a fixing device for fixing the tension member at one end of the anchor installation hole, and a filler between the anchor installation hole and the tension member. With grout. At one end of the tendon, a free length portion is formed to separate the grout and the tendon, and at the other end, a fixing length portion where the tendon is fixed by grout is formed. In addition, there is provided an adhesive covering the boundary between the free length portion and the fixing length portion, and a heat-shrinkable tube covering the outer periphery of the adhesive. The heat-shrinkable tube may further include an insulating layer that isolates the grout from the heat-shrinkable tube.
【００１３】緊張材の緊張時に、緊張材と接着材および
接着材と熱収縮チューブとの接着が切れるよりも先に絶
縁層と熱収縮チューブまたは絶縁層とグラウトとの接着
が切れる。もしくは、接着材そのものが大きく変形する
前に、絶縁層と熱収縮チューブまたは絶縁層とグラウト
との接着が切れる。このようにして、止水機能の維持を
図ることができる。When the tension member is tensioned, the bonding between the insulating layer and the heat-shrinkable tube or the insulating layer and the grout is broken before the bonding between the tension member and the adhesive and between the adhesive and the heat-shrinkable tube. Alternatively, the bonding between the insulating layer and the heat-shrinkable tube or between the insulating layer and the grout is broken before the adhesive itself is greatly deformed. In this way, the water stop function can be maintained.
【００１４】このような止水機能の維持を効果的に実現
するには、緊張材と接着材との接着力または接着材と熱
収縮チューブとの接着力よりも、絶縁層とグラウトとの
接着力または絶縁層と熱収縮チューブとの接着力の方が
小さいことが望ましい。そのためには、緊張材、接着
材、熱収縮チューブ、絶縁層の材質、表面性状を適宜選
択する。In order to effectively maintain such a water-stopping function, the adhesion between the insulating layer and the grout should be compared with the adhesion between the tendon and the adhesive or between the adhesive and the heat-shrinkable tube. It is desirable that the force or the adhesive force between the insulating layer and the heat shrink tube be smaller. For this purpose, materials and surface properties of the tendon, the adhesive, the heat-shrinkable tube, and the insulating layer are appropriately selected.
【００１５】緊張材には、次のような各種PC鋼より線を
用いることができる。複数の素線をより合わせた裸の
PC鋼より線。より合わされた複数の素線と、各素線ご
とに外周に形成されたプラスチック被覆とを具えるPC鋼
より線。より合わされた複数の素線と、素線の隙間に
充填されるプラスチックと、このより線の外周により目
が現れるように形成されたプラスチック被覆とを具える
PC鋼より線。As the tendon, various types of PC steel strands as described below can be used. Naked twisted multiple strands
PC steel strand. A PC steel stranded wire comprising a plurality of twisted strands and a plastic coating formed on the outer periphery of each strand. It comprises a plurality of twisted strands, plastic filled in gaps between the strands, and a plastic covering formed so that eyes appear at the outer periphery of the strand.
PC steel strand.
【００１６】上記PC鋼より線とにおけるプラスチッ
クには、エポキシ樹脂やポリエチレン樹脂を用いること
ができる。また、これらプラスチック被覆には、突起を
設けたり、凹部を形成することで、緊張材と接着材との
接着力を向上させることができる。さらに、上記と
のPC鋼より線の場合、各素線の隙間に接着材が充填され
るようにすることが望ましい。Epoxy resin or polyethylene resin can be used as the plastic in the above-mentioned PC steel strand. Further, by providing projections or forming recesses on these plastic coatings, the adhesive strength between the tendon and the adhesive can be improved. Furthermore, in the case of the above-mentioned PC steel stranded wire, it is desirable that the gap between each of the strands is filled with an adhesive.
【００１７】接着材には、ホットメルト系の接着材が好
適である。The adhesive is preferably a hot-melt adhesive.
【００１８】熱収縮チューブには絶縁層との接着性が低
いものが好ましい。材質としては例えばポリエチレンが
挙げられる。The heat-shrinkable tube preferably has low adhesiveness to the insulating layer. Examples of the material include polyethylene.
【００１９】絶縁層の具体例としては、ビニールテー
プ、油浸布、薄いポリエチレン被膜、紙などが挙げられ
る。いずれも表面が平滑なものが好ましい。これらの材
料を熱収縮チューブの外周に巻き付けることなどにより
絶縁層を形成すればよい。絶縁層と熱収縮チューブとの
間には、必要に応じて弱い接着力の接着材を介在させて
も良い。Specific examples of the insulating layer include vinyl tape, oil immersion, a thin polyethylene film, and paper. In any case, those having a smooth surface are preferable. The insulating layer may be formed by winding these materials around the outer periphery of the heat-shrinkable tube. If necessary, an adhesive having a weak adhesive strength may be interposed between the insulating layer and the heat-shrinkable tube.
【００２０】[0020]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。図１は本発明止水構造の断面図である。このアン
カー構造体も図１の構造体と同様に、アンカー設置孔の
開口端に設けた定着具でPC鋼より線1の一端を固定し、
アンカー設置孔とPC鋼より線1との間にグラウト2を充填
したものである。定着具側のPC鋼より線1の外周はシー
ス3に囲まれて、グラウト2との付着を隔絶した自由長部
が形成され、その反対側（他端側）にはグラウト2に付
着されてPC鋼より線1を固定する定着長部が形成され
る。Embodiments of the present invention will be described below. FIG. 1 is a sectional view of the water stopping structure of the present invention. This anchor structure, similarly to the structure of FIG. 1, fixes one end of the PC steel strand 1 with a fixing tool provided at the open end of the anchor installation hole,
Grout 2 is filled between anchor installation hole and PC steel strand 1. The outer periphery of the PC steel strand 1 on the fixing device side is surrounded by the sheath 3 to form a free length part which is isolated from the grout 2 and is attached to the grout 2 on the other side (the other end). A fixing length portion for fixing the PC steel strand 1 is formed.
【００２１】ここで、自由長部と定着長部との境界部に
は次のような止水構造を形成する。まず、境界部に接着
材4を塗布する。PC鋼より線1の素線間に隙間が形成され
ている場合、その隙間にも接着材4が充填されるように
する。次に、接着材4を塗布した個所の外周に熱収縮チ
ューブ5をはめ込む。そして、熱収縮チューブ5を加熱収
縮させて境界部を被覆する。さらに、熱収縮チューブ5
の外周にビニールテープの巻回などにより絶縁層6を形
成する。接着材を塗布してから熱収縮チューブをはめ込
む代わりに、予め熱軟化性の接着材を内周に塗布した熱
収縮チューブを用いても良い。Here, the following water blocking structure is formed at the boundary between the free length portion and the fixing length portion. First, the adhesive 4 is applied to the boundary. When a gap is formed between the strands of the PC stranded wire 1, the gap is also filled with the adhesive 4. Next, the heat-shrinkable tube 5 is fitted around the outer periphery of the portion where the adhesive 4 has been applied. Then, the heat-shrinkable tube 5 is heated and shrunk to cover the boundary. In addition, heat shrink tube 5
An insulating layer 6 is formed on the outer periphery of the substrate by winding a vinyl tape or the like. Instead of fitting the heat-shrinkable tube after applying the adhesive, a heat-shrinkable tube in which a heat-softening adhesive is applied to the inner periphery in advance may be used.
【００２２】このようなアンカー構造体に用いられるPC
鋼より線は裸のPC鋼より線でも構わないが、次に述べる
ように被覆を具えるものが好適である。PC used for such an anchor structure
The steel strand may be a bare PC steel strand, but is preferably provided with a coating as described below.
【００２３】図２示すPC鋼より線は、各素線10の表面に
プラスチック被覆11を形成し、この被覆素線をより合わ
せたものである。The twisted PC steel wire shown in FIG. 2 is obtained by forming a plastic coating 11 on the surface of each wire 10 and twisting the coated wires.
【００２４】図３に示すPC鋼より線は、裸の素線10の隙
間にプラスチックを充填すると共に、より線の外周によ
り目が現れる程度にプラスチック被覆11を形成したもの
である。The strand of PC steel shown in FIG. 3 is obtained by filling the gap between the bare strands 10 with plastic and forming a plastic coating 11 to such an extent that the outer periphery of the strand makes the eyes appear.
【００２５】図４に示すPC鋼より線は、グラウトとの付
着力をより向上させるために図３の被覆PC鋼より線を改
善したものである。すなわち、プラスチック被覆11の外
周に、被覆内部にまで届かない深さで、珪砂等の固形粒
子12を埋め込んで粗面化している。The PC steel strand shown in FIG. 4 is an improved version of the coated PC steel strand shown in FIG. 3 in order to further improve the adhesion to grout. That is, solid particles 12 of silica sand or the like are buried in the outer periphery of the plastic coating 11 at a depth that does not reach the inside of the coating, and the surface is roughened.
【００２６】図５に示すPC鋼より線も同様の目的で、プ
ラスチック被覆11の外周にショット等により微小な凹部
13の粗面を構成したものである。For the same purpose, the PC steel stranded wire shown in FIG.
It comprises 13 rough surfaces.
【００２７】図６に示すPC鋼より線は、プラスチック被
覆11の外表面に複数の螺旋溝14を形成したものである。The PC steel strand shown in FIG. 6 has a plurality of spiral grooves 14 formed on the outer surface of the plastic coating 11.
【００２８】なお、定着具については図示していない
が、公知のものと同様である。例えば、複数の円錐孔を
有するアンカーディスクを用い、この円錐孔にPC鋼より
線を把持したくさびをはめ込むことでPC鋼より線の定着
を行う。Although the fixing device is not shown, it is the same as a known fixing device. For example, an anchor disk having a plurality of conical holes is used, and a wedge holding the PC steel stranded wire is fitted into the conical hole to fix the PC steel stranded wire.
【００２９】（実験例）本発明止水構造（図１）と従来
の止水構造（図７）について、PC鋼より線の緊張前後に
おける止水性能の変化に関する比較を行った。(Experimental Example) A comparison was made between the water stopping structure of the present invention (FIG. 1) and the conventional water stopping structure (FIG. 7) regarding the change in water stopping performance before and after the tension of the PC steel strand.
【００３０】＜比較例＞裸のPC鋼より線に、粉体塗装処
理により素線の隙間にエポキシ樹脂を充填すると共に、
PC鋼より線の表面にも、より目が外周に現れるように、
エポキシ樹脂を被覆して、被覆PC鋼より線を用意する。
自由長部はPC鋼より線とのクリアランスが3mm程度ある
内径を持つポリエチレン樹脂のシースで被覆する。ま
た、自由長部と定着長部の境界部には、熱によって軟化
するホットメルト接着材を塗布し、ポリエチレン製熱収
縮チューブで接着材の外周を覆って止水した。<Comparative Example> A bare PC stranded wire was filled with epoxy resin in the gap between the wires by powder coating,
On the surface of PC steel strand, so that the eyes appear on the outer circumference,
Prepare a coated PC steel strand by coating with epoxy resin.
The free length is covered with a sheath of polyethylene resin having an inner diameter with a clearance of about 3 mm from the PC strand. A hot-melt adhesive softened by heat was applied to the boundary between the free length and the fixing length, and the outer periphery of the adhesive was covered with a heat shrinkable tube made of polyethylene to stop water.
【００３１】＜実施例＞上記比較例の熱収縮チューブの
外周にビニールテープを巻き付けて絶縁層とした。<Example> A vinyl tape was wound around the heat-shrinkable tube of the comparative example to form an insulating layer.
【００３２】比較例、実施例のいずれもPC鋼より線の緊
張前における境界部は、490kPa（５kgf/cm2）の圧力で1
00時間漏れがないという止水性能を有している。In both the comparative example and the example, the boundary portion before the tension of the PC steel stranded wire was 1 mm at a pressure of 490 kPa (5 kgf / cm 2 ).
It has a water stoppage performance of no leakage for 00 hours.
【００３３】次に、アンカー設置孔を模擬するφ115mm
の鋼管に15.2mm径の被覆PC鋼より線を１本挿入し、周囲
にグラウトを充填して、グラウトが硬化した後、199.1k
N（20.3tf）で緊張した。そして、グラウトを除去して
境界部の止水試験をした。Next, φ115 mm simulating the anchor installation hole
Insert a 15.2mm diameter coated PC stranded wire into the steel pipe, fill the surroundings with grout, and after the grout hardens, 199.1k
I was nervous at N (20.3tf). Then, the grout was removed, and a water stop test was performed on the boundary.
【００３４】その結果、比較例は343kPa（3.5kgf/cm2）
の圧力で漏水し、止水性能が低下した。この原因は次の
ように考えられる。PC鋼より線が緊張されて応力が負荷
されると、熱収縮チューブは表面が熱により活性化さ
れ、グラウトとの付着力が高くなりPC鋼より線と熱収縮
チューブとの界面で大きな歪力が発生する。それに伴っ
て、PC鋼より線と接着材との界面か、熱収縮チューブと
接着材との界面の接着力に変状をきたしたり、界面にあ
る接着材が大きく歪んだためと思われる。As a result, the comparative example was 343 kPa (3.5 kgf / cm 2 )
The water leaked at the pressure, and the water stopping performance was reduced. The cause is considered as follows. When the stress is applied due to the tension of the PC steel strand, the surface of the heat-shrinkable tube is activated by heat, and the adhesion to the grout increases, resulting in a large strain at the interface between the PC steel strand and the heat-shrinkable tube. Occurs. Along with this, it is considered that the adhesive force at the interface between the PC steel strand and the adhesive or the interface between the heat-shrinkable tube and the adhesive changed, or the adhesive at the interface was greatly distorted.
【００３５】一方、実施例の境界部は490kPa（５kgf/cm
2）の圧力で100時間漏水がなく、PC鋼より線を緊張する
前と同等の止水性能を維持していることがわかった。こ
れは、熱収縮チューブの外周に絶縁層を形成することに
より、PC鋼より線が緊張されて応力が負荷されると熱収
縮チューブとグラウトとの直接の付着力がなくなり、PC
鋼より線と接着材との界面または熱収縮チューブと接着
材との界面での接着力は大きな変状をきたさないためと
考えられる。On the other hand, the boundary of the embodiment is 490 kPa (5 kgf / cm
It was found that there was no water leakage under the pressure of 2 ) for 100 hours, and the water-stop performance equivalent to that before tensioning the PC strand was maintained. This is because, by forming an insulating layer on the outer periphery of the heat-shrinkable tube, when the PC steel strand is tensioned and stress is applied, the direct adhesive force between the heat-shrinkable tube and the grout is lost, and the PC
It is considered that the adhesive force at the interface between the steel strand and the adhesive or the interface between the heat-shrinkable tube and the adhesive does not cause a large deformation.
【００３６】今回、緊張材と接着材との接着力、接着材
と熱収縮チューブとの接着力、絶縁層とグラウトとの接
着力、絶縁層と熱収縮チューブとの接着力を測定したわ
けではないが、以上の実験結果から緊張材と接着材との
接着力または接着材と熱収縮チューブとの接着力より
も、絶縁層とグラウトとの接着力または絶縁層と熱収縮
チューブとの接着力の方が小さいことが推測される。This time, the adhesive strength between the tendon and the adhesive, the adhesive strength between the adhesive and the heat-shrinkable tube, the adhesive strength between the insulating layer and the grout, and the adhesive strength between the insulating layer and the heat-shrinkable tube have not been measured. However, based on the above experimental results, the adhesive force between the insulating layer and the grout or the adhesive force between the insulating layer and the heat-shrinkable tube is less than the adhesive force between the tendon and the adhesive or between the adhesive and the heat-shrinkable tube. Is estimated to be smaller.
【００３７】尚、本発明の止水構造は、上述の具体例に
のみ限定されるものではなく、本発明の要旨を逸脱しな
い範囲内において種々変更を加え得ることは勿論であ
る。It should be noted that the water stopping structure of the present invention is not limited to the specific examples described above, and it is needless to say that various changes can be made without departing from the gist of the present invention.
【００３８】[0038]
【発明の効果】以上説明したように、本発明止水構造に
よれば、熱収縮チューブとグラウトとを隔絶する絶縁層
を形成することで、緊張時緊張後に自由長部と定着長部
との境界部の止水性能が低下することを抑制し、信頼性
の高い止水構造を実現できる。As described above, according to the water stopping structure of the present invention, by forming an insulating layer for separating the heat-shrinkable tube and the grout, the free length portion and the fixing length portion can be separated from each other after tensioning. A reduction in the water stopping performance at the boundary can be suppressed, and a highly reliable water stopping structure can be realized.
【図１】本発明の止水構造を示す断面図である。FIG. 1 is a cross-sectional view showing a water stop structure of the present invention.
【図２】本発明の止水構造に用いられるPC鋼より線の断
面図である。FIG. 2 is a cross-sectional view of a PC steel stranded wire used in the water stopping structure of the present invention.
【図３】本発明の止水構造に用いられるPC鋼より線の断
面図である。FIG. 3 is a cross-sectional view of a PC steel stranded wire used in the water stopping structure of the present invention.
【図４】本発明の止水構造に用いられるPC鋼より線の断
面図である。FIG. 4 is a cross-sectional view of a PC steel stranded wire used in the water stopping structure of the present invention.
【図５】本発明の止水構造に用いられるPC鋼より線の断
面図である。FIG. 5 is a cross-sectional view of a PC steel stranded wire used in the water stopping structure of the present invention.
【図６】（ａ）は本発明の止水構造に用いられるPC鋼よ
り線の外観斜視図、（ｂ）は部分縦断面図である。FIG. 6A is an external perspective view of a PC steel stranded wire used in the water stopping structure of the present invention, and FIG. 6B is a partial longitudinal sectional view.
【図７】従来の止水構造を示す断面図である。FIG. 7 is a sectional view showing a conventional water blocking structure.
1 PC鋼より線 2 グラウト 3 シース 4 接着材 5 熱収縮チューブ 6 絶縁層 10 素線 11 プラスチック被覆 12 固形粒子 13 凹部 14 螺旋溝 1 PC steel strand 2 Grout 3 Sheath 4 Adhesive 5 Heat shrink tubing 6 Insulation layer 10 Element wire 11 Plastic coating 12 Solid particles 13 Depression 14 Spiral groove
───────────────────────────────────────────────────── フロントページの続き (72)発明者 飯尾 英二 兵庫県伊丹市昆陽北一丁目１番１号 住 友電気工業株式会社伊丹製作所内 (56)参考文献 特開 平６−146277（ＪＰ，Ａ) 特開 昭56−16728（ＪＰ，Ａ) 特開 昭61−21225（ＪＰ，Ａ) 特開 平10−331330（ＪＰ，Ａ) 実開 平１−138930（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 5/80 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Eiji Iio, inventor, 1-1-1 Kunyokita, Itami-shi, Itami-shi, Hyogo Sumitomo Electric Industries, Ltd. Itami Works (56) References JP-A-6-146277 (JP, A JP-A-56-16728 (JP, A) JP-A-61-21225 (JP, A) JP-A-10-331330 (JP, A) JP-A-1-138930 (JP, U) (58) Field (Int.Cl. 7 , DB name) E02D 5/80
Claims (5)
と、 緊張材の一端側においてグラウトと緊張材とを隔絶した
自由長部と、 緊張材の他端側において緊張材をグラウトで定着した定
着長部と、 自由長部と定着長部との境界を覆う接着材と、 前記接着材の外周を覆う熱収縮チューブと、 熱収縮チューブとグラウトとを隔絶する絶縁層とを具え
ることを特徴とするアンカー構造体の止水構造。A tension member inserted into the anchor installation hole; a fixing device for fixing the tension member at one end of the anchor installation hole; a grout filled between the anchor installation hole and the tension member; A free length portion that separates the grout and the tension member at one end of the tension member, a fixing length portion where the tension material is fixed with the grout at the other end side of the tension member, and an adhesive covering a boundary between the free length portion and the fixing length portion And a heat-shrinkable tube that covers the outer periphery of the adhesive, and an insulating layer that separates the heat-shrinkable tube and the grout.
鋼より線で、 各素線の隙間に接着材が充填されていることを特徴とす
る請求項１に記載のアンカー構造体の止水構造。2. A tension member is a PC in which a plurality of strands are twisted.
2. The water stopping structure for an anchor structure according to claim 1, wherein an adhesive is filled in a gap between each of the strands of the steel strand.
と、各素線ごとに外周に形成されたプラスチック被覆と
を具えるPC鋼より線で、 各素線の隙間に接着材が充填されていることを特徴とす
る請求項１に記載のアンカー構造体の止水構造。3. A tension member is a PC steel stranded wire comprising a plurality of twisted strands and a plastic coating formed on the outer periphery of each strand, and a gap is filled with an adhesive in each strand. The water stopping structure for an anchor structure according to claim 1, wherein:
と、素線の隙間に充填されるプラスチックと、前記より
線の外周により目が現れるように形成されたプラスチッ
ク被覆とを具えるPC鋼より線であることを特徴とする請
求項１に記載のアンカー構造体の止水構造。4. A PC comprising a plurality of twisted strands, plastic filled in gaps between the strands, and a plastic covering formed so that the outer periphery of the strands is more visible. The water stopping structure for an anchor structure according to claim 1, wherein the water stopping structure is a steel strand.
と熱収縮チューブとの接着力よりも、絶縁層とグラウト
との接着力または絶縁層と熱収縮チューブとの接着力の
方が小さいことを特徴とする請求項１に記載のアンカー
構造体の止水構造。5. The adhesive force between the insulating layer and the grout or the adhesive force between the insulating layer and the heat-shrinkable tube is larger than the adhesive force between the tendon and the adhesive or between the adhesive and the heat-shrinkable tube. The waterproof structure for an anchor structure according to claim 1, wherein the structure is small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000049642A JP3284547B2 (en) | 2000-02-25 | 2000-02-25 | Water stopping structure of anchor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000049642A JP3284547B2 (en) | 2000-02-25 | 2000-02-25 | Water stopping structure of anchor structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001241039A JP2001241039A (en) | 2001-09-04 |
| JP3284547B2 true JP3284547B2 (en) | 2002-05-20 |
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ID=18571547
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000049642A Expired - Lifetime JP3284547B2 (en) | 2000-02-25 | 2000-02-25 | Water stopping structure of anchor structure |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3828098B2 (en) * | 2003-07-15 | 2006-09-27 | 住友電工スチールワイヤー株式会社 | Water stop structure of anchor structure |
| JP6661449B2 (en) * | 2016-04-06 | 2020-03-11 | 株式会社ケー・エフ・シー | Rock bolt |
| JP7046434B2 (en) * | 2018-03-13 | 2022-04-04 | 弘和産業株式会社 | Water-stopping structure of tension material |
| JP6512358B1 (en) * | 2018-10-16 | 2019-05-15 | 山里産業株式会社 | Temperature measurement apparatus and method of manufacturing temperature measurement apparatus |
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2000
- 2000-02-25 JP JP2000049642A patent/JP3284547B2/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| JP2001241039A (en) | 2001-09-04 |
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