JP2005351028A - Removal anchor method and its anchor tendon - Google Patents

Removal anchor method and its anchor tendon Download PDF

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JP2005351028A
JP2005351028A JP2004175305A JP2004175305A JP2005351028A JP 2005351028 A JP2005351028 A JP 2005351028A JP 2004175305 A JP2004175305 A JP 2004175305A JP 2004175305 A JP2004175305 A JP 2004175305A JP 2005351028 A JP2005351028 A JP 2005351028A
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end side
tensile material
tip
anchor
rear end
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Koichi Suga
浩一 菅
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Nittoc Constructions Co Ltd
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Nittoc Constructions Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To realize facilitation without resulting in residue, leakage, etc. of fats and oil in removing operation of an anchor tendon easy in formation work of tendons and at the same time realize an anchor tendon easy in the formation operation. <P>SOLUTION: Front end bare wire part 12a of unbonded tendon material 12 coated with a coating pipe 13 is retained by the front end holder 16 retained and released only by the axial movement to the front end side. The tendon is substantially linearly assembled to a load resistance body 14 together with the front end retaining tool, in this way, an anchor tendon 10 insertedly arranged into the anchor hole of the ground. After achievement of execution purpose as an anchor, the axial line moving force to the front end side is imparted to the tendon 12 after release of the anchoring force. Under release of retention by the front end retaining tool following the axial line transfer of the tendon to the front end side to the front end holding tool 16 and the coating pipe 13, the tendon is drawn out of the rear end side to remove from the ground. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、アンカーとしての施工目的の達成後、不要となった引張材を地中から引き抜いて除去する除去アンカー工法、およびこの除去アンカー工法において使用されるアンカーテンドンに関する。   The present invention relates to a removal anchor method for removing a tensile material that has become unnecessary after the construction purpose as an anchor is removed, and an uncurtain dong used in the removal anchor method.

地中にPC鋼線材等の引張材を打設し、これを緊張することによって地盤、構造物等の安定化をはかるアンカーの工法として、たとえば、アンカーとしての施工目的の達成後、不要となった引張材を地中での障害物とならないように地中から引き抜いて除去する、いわゆる除去アンカー工法が知られている。   As an anchor construction method that stabilizes the ground, structures, etc. by placing a tensile material such as PC steel wire in the ground and tensioning it, it becomes unnecessary after achieving the purpose of construction as an anchor, for example. A so-called removal anchor method is known, in which a tensile material is pulled out from the ground and removed so as not to become an obstacle in the ground.

この種の除去アンカー工法においては、引張材として、たとえば、ポリエチレンチューブ等からなる被覆管によって被覆された、いわゆるアンボンド型の引張材が利用され、この引張材を、たとえば特開平9−31976号公報等に開示のような、耐荷体と称される支持部材周りに略U形状に掛けて組み合わせることで、この除去アンカー工法において使用されるアンカーテンドンは形成される。そして、略U形状のまま地中に埋設された引張材は、アンカーとしての施工目的の達成後、略U形状の一方の端末の牽引のもとで耐荷体、および被覆管を地中に残しつつ地中から引き抜かられて除去される。   In this type of removal anchor method, a so-called unbonded type tensile material covered with a cladding tube made of, for example, a polyethylene tube or the like is used as the tensile material, and this tensile material is, for example, disclosed in JP-A-9-31976. The uncurtain dong used in this removal anchor method is formed by combining the support member called a load bearing body in a substantially U shape as disclosed in the above. And the tensile material embedded in the ground in the substantially U shape leaves the load bearing body and the cladding tube in the ground under the pulling of one end of the substantially U shape after achieving the construction purpose as an anchor. While being pulled out from the ground, it is removed.

ところで、略U形状に折り返した引張材を耐荷体に組み合わせる形態の従来のアンカーテンドンにおいては、この折り返し部分(略U字部分)が引張材の引き抜きの際の多大な抵抗力となり、それ以上の牽引力がなければこの引張材の引き抜きが行えないことから、通常は、多大な牽引力を有する吊り上げレッカー等の大型機械が、この引き抜き作業の際に用いられる。   By the way, in the conventional uncurtain dong in which the tensile material folded back in a substantially U shape is combined with the load-bearing body, this folded portion (substantially U-shaped portion) becomes a great resistance force when the tensile material is pulled out, and more Since this tension member cannot be pulled out without traction force, a large machine such as a lifting wrecker having a great traction force is usually used for this pulling operation.

しかしながら、このような吊り上げレッカー等の大型機械は、その設置および作業に多大なスペースを要することから、狭い現場での除去作業が容易でなく、場合によっては、狭い現場での除去アンカーの施工自体が困難になることも多分に起こり得る。   However, such a large-sized machine such as a lifting wrecker requires a lot of space for installation and work, and therefore, removal work in a narrow site is not easy, and in some cases, the removal anchor itself is installed in a narrow site. Can be difficult.

そして、このような大きな抵抗力の作用した状態での引張材の引き抜きを考慮して、通常は、グリース等の油脂剤が、潤滑材として引張材と被覆管との間に注入、充填されている。しかしながら、このような油脂剤は、被覆管からの引張材の引き抜きを容易にする反面、地中に残された場合の地中の汚染、およびその引き抜きの際に外部に漏出、飛散した場合のその周辺の汚染等をも招く虞のあることから、環境保全等の点から、あまり好ましいものとは考えられない。   In consideration of pulling out the tensile material in a state where such a large resistance acts, normally, an oil or grease such as grease is injected and filled between the tensile material and the cladding tube as a lubricant. Yes. However, such an oil and fat agent makes it easy to pull out the tensile material from the cladding tube, but on the other hand, when it is left in the ground, it is contaminated underground, and when it is pulled out, it leaks to the outside. Since there is a possibility of causing the surrounding contamination, it is not considered preferable from the viewpoint of environmental protection.

さらに、耐荷体に引張材を略U形状に掛ける従来の形態のアンカーテンドンにおいては、このアンカーテンドンとしての外形を細くすべく、通常は、引張材を可能な限りの小径の略U形状に折り返すため、耐荷体に対するその組み付け作業、ひいてはアンカーテンドンの形成作業が煩雑化しやすい。
特開平9−31976号公報
Further, in an uncurtain dong of a conventional form in which a tensile material is hung on a load bearing body in a substantially U shape, the tensile material is usually folded back into a substantially U shape having a small diameter as much as possible in order to reduce the outer shape of the uncurtain dong. Therefore, the assembling work with respect to the load-bearing body, and the forming work of the uncurtain dong are easily complicated.
JP-A-9-31976

解決しようとする問題点は、引張材の除去が容易でなく、また引張材に使用される油脂剤が環境汚染の原因となりかねないという点、およびアンカーテンドンの形成作業が煩雑化しやすいという点である。   The problems to be solved are that it is not easy to remove the tensile material, that the oil and fat used in the tensile material can cause environmental pollution, and that the operation of forming the uncurtain dong tends to be complicated. is there.

請求項1に係る本発明の除去アンカー工法においては、被覆管で被覆されたアンボンド型引張材の先端裸線部分を、その先端側方向への軸線移動によってのみ保持解除される先端保持具により保持し、この引張材をこの先端保持具と共に耐荷体に対してほぼ直線状に組み付けることにより、地盤のアンカー孔に挿入配置されるアンカーテンドンを形成するとともに、アンカー孔内へのグラウト後における、その後端側での牽引に伴うこの引張材の緊張定着により、これを地盤に対するアンカーの定着、施工としている。そして、アンカーとしての施工目的の達成後、その先端側方向への軸線移動力を定着力解除後の引張材に付与し、先端保持具および被覆管に対する先端側方向へのこの引張材の軸線移動に伴った、この先端保持具による保持の解除下において、引張材をその後端側から引き抜いて地中から除去することを、この発明での最も主要な特徴としている。   In the removal anchor method of the present invention according to claim 1, the tip bare wire portion of the unbonded tensile material covered with the cladding tube is held by the tip holder which is released and held only by the axial movement in the tip side direction. And, by assembling this tensile material with the tip holder in a substantially straight line with respect to the load-bearing body, an uncurtain dong inserted and arranged in the anchor hole of the ground is formed, and after grouting into the anchor hole, Due to the tension fixation of the tensile material that accompanies traction on the end side, this is anchored and constructed on the ground. After the construction purpose as the anchor is achieved, the axial movement force in the distal direction is applied to the tensile material after the fixing force is released, and the axial movement of the tensile material in the distal direction with respect to the tip holder and the cladding tube. Accordingly, the main feature of the present invention is that the tensile material is pulled out from the rear end side and removed from the ground under the release of the holding by the tip holder.

また、請求項2に係る本発明の除去アンカー工法のアンカーテンドンは、被覆管によって被覆されたアンボンド型引張材と、ほぼ直線状での引張材の支持を可能とする、引張材の軸線方向に延びた長手形状の軸状本体を有した耐荷体と、所定の支持具によって耐荷体の持つ先端側支持片に固定的に連結、支持されるとともに、引張材の先端裸線部分に対する把持のもとで後端側牽引方向への引張材の軸線移動を規制可能とする把持手段、およびこの把持手段を引張材に対する把持解除位置に滞留させるための滞留手段を、その本体内部に有してなる先端保持具とを備え、先端保持具、およびこれと一体的に連結、支持された被覆管に対する、その先端側方向への引張材の軸線移動により、把持手段をその把持解除位置に移動、滞留可能としたことをその最も主要な特徴としている。   Further, the uncurtain dong of the removal anchor method of the present invention according to claim 2 is capable of supporting an unbonded tensile material covered with a cladding tube and a tensile material in a substantially linear shape in the axial direction of the tensile material. A load-bearing body having an elongated shaft-shaped main body that is extended and fixedly connected to and supported by a tip-side support piece of the load-bearing body by a predetermined support tool, and for gripping the tip end bare wire portion of the tensile material And holding means for restricting the axial movement of the tensile material in the pulling direction on the rear end side, and a retaining means for retaining the gripping means at a grip releasing position for the tensile material inside the main body. The gripping means is moved to the grip release position and retained by the axial movement of the tensile material in the tip side direction with respect to the tip holder and the cladding tube connected and supported integrally with the tip holder. Made possible The door has as its most important feature.

さらに、請求項3に係る本発明においては、先端保持具の本体を、その周面をめねじ部とした挿通孔を後端側に有する略有底筒状体として概略形成するとともに、この先端保持具を耐荷体に対して固定的に連結、支持する支持具を、一体の大径部および小径部からなる、引張材の先端裸線部分の内挿可能な段付き筒状体として具体化している。そして、引張材の先端裸線部分の挿通を伴った、被覆管先端部に対するその大径部の一体的な冠着のもとで、この支持具を被覆管先端部に一体的に固着し、その周面をおねじ部としたこの支持具の小径部を、耐荷体の先端側支持片に設けられた、支持具の大径部より小径の小径挿通孔を介して、先端保持具本体のめねじ部に螺着接合することにより、これを支持具による耐荷体に対する先端保持具の固定的な連結、および耐荷体に対する引張材の支持とすることを、その最も主要な特徴としている。   Further, in the present invention according to claim 3, the main body of the tip holder is roughly formed as a substantially bottomed cylindrical body having an insertion hole with the peripheral surface as a female thread portion on the rear end side. The support for fixedly connecting and supporting the holder to the load-bearing body is embodied as a stepped cylindrical body consisting of an integral large-diameter portion and small-diameter portion that can be inserted into the end bare wire portion of the tensile material. ing. And, under the integral crowning of the large-diameter portion with respect to the cladding tube tip, with the insertion of the bare wire end of the tensile material, this support is integrally fixed to the cladding tube tip, The small diameter portion of the support having its peripheral surface as an external thread portion is provided on the distal end side support piece of the load-bearing body via the small diameter insertion hole having a smaller diameter than the large diameter portion of the support. By screwing and joining the female thread portion, the main feature is that this is a fixed connection of the tip holder to the load-bearing body by the support and the support of the tensile material to the load-bearing body.

また、請求項4に係る本発明においては、耐荷体を、先端側支持片に対する後端側支持片を有して形成し、支持具の大径部の挿通可能な大径挿通孔をこの後端側支持片に設けることにより、この後端側支持片による引張材の支持をはかることをその最も主要な特徴としている。   Further, in the present invention according to claim 4, the load bearing body is formed having a rear end side support piece with respect to the front end side support piece, and a large diameter insertion hole into which the large diameter portion of the support can be inserted is formed thereafter. The main feature is that the tension member is supported by the rear end side support piece by being provided on the end side support piece.

請求項1に係る本発明の除去アンカー工法は、引張材を耐荷体に対してほぼ直線的に組み付けたアンカーテンドンを使用しており、引張材の引き抜きに対しては、地中に埋設された状態での延長線上で直線的に牽引すれば足りるため、多大な抵抗力に抗する牽引力のもとでの引き抜きが不要となり、よってその除去作業の容易化が十分にはかられるという利点がある。   The removal anchor method of the present invention according to claim 1 uses an uncurtain dong in which a tensile material is assembled substantially linearly with respect to a load-bearing body, and is embedded in the ground for pulling out the tensile material. Since it is sufficient to pull straightly on the extended line in the state, there is an advantage that it is not necessary to pull out under a pulling force that resists a great resistance force, and thus the removal work can be facilitated sufficiently. .

そして、引き抜きのための機械、装置等を用いることなく引張材の除去作業が可能となるため、作業現場に大型機械を設置するための用地の確保は不要となる。従って、この発明においては、現場スペースを問わない汎用性に優れた工法が容易に提供できるという利点がある。   And since the removal work of a tension | tensile_strength material becomes possible, without using the machine, apparatus, etc. for extraction, securing of the site for installing a large sized machine in a work site becomes unnecessary. Therefore, in this invention, there exists an advantage that the construction method excellent in the versatility irrespective of the field space can be provided easily.

さらに、引張材の引き抜きの妨げとなる多大な抵抗力が作用しないため、引張材のための潤滑材となる油脂剤がこの引張材から省略できる。つまり、油脂剤が地中に残された場合の地中汚染、および引張材の引き抜きの際におけるその周辺外部への油脂剤の漏出、飛散等の不具合がなくなるため、この発明によれば、環境保全等にも十分に貢献できる工法が容易に提供できるという利点がある。   Furthermore, since a great resistance force that hinders pulling out of the tensile material does not act, an oil and fat agent serving as a lubricant for the tensile material can be omitted from the tensile material. That is, since there are no problems such as underground contamination when the grease is left in the ground, and leakage and scattering of the grease to the outside when pulling the tensile material, according to the present invention, There is an advantage that a construction method that can sufficiently contribute to maintenance can be easily provided.

そして、請求項2に係る本発明の除去アンカー工法のアンカーテンドンによれば、構成の複雑化等を伴うことなく、上記除去アンカー工法を適切に遂行することが可能になるという利点がある。   According to the uncurtain dong of the removal anchor method of the present invention according to claim 2, there is an advantage that the removal anchor method can be appropriately performed without complicating the configuration.

また、先端保持具によるその先端部の保持のもとで、引張材を耐荷体に対してほぼ直線状に組み付ければ足りるため、アンカーテンドンの形成作業が確実に容易化されるという利点もある。そして、ほぼ直線状の引張材を耐荷体に対して組み付ければ足りるため、アンカーテンドンとしての細径化が容易に可能となることから、この点からも、アンカーテンドンの形成作業の容易化が十分にはかられるという利点も得られる。   In addition, since it is sufficient to assemble the tension material substantially linearly with respect to the load-bearing body under the holding of the tip portion by the tip holder, there is also an advantage that the operation of forming the uncurtain dong is surely facilitated. . And since it is sufficient to assemble a substantially straight tensile material to the load-bearing body, it is possible to easily reduce the diameter of the uncurtain dong. There is also an advantage that it can be fully worn.

さらに、この発明の請求項3の構成によれば、一体の大径部、小径部を持つ段付き筒状体としてなるものを支持具としているため、耐荷体に対する被覆管および先端保持具の連結、支持が構成の複雑化を伴うことなく容易に確保でき、よって、この点からも、アンカーテンドンの形成作業の容易化が十分にはかられるという利点が得られる。   Furthermore, according to the configuration of claim 3 of the present invention, since the supporting tool is a stepped cylindrical body having an integral large diameter portion and a small diameter portion, the connection of the cladding tube and the tip holder to the load bearing body Therefore, the support can be easily secured without complicating the structure, and therefore, from this point, the advantage of facilitating the easy operation of the uncurtain dong can be obtained.

また、この発明の請求項4の構成によれば、耐荷体の後端側支持片に支持具大径部の遊挿を可能とする大径挿通孔を設けているため、結束バンド等の別部材を用いることなく、耐荷体に対する引張材の支持が可能となり、よって、耐荷体における引張材の支持の確実性が構成の複雑化等を伴うことなく確実に向上されるという利点が得られる。   According to the fourth aspect of the present invention, since the large-diameter insertion hole that allows loose insertion of the support large-diameter portion is provided in the rear end side support piece of the load bearing body, Without using a member, it is possible to support the tension material with respect to the load bearing body, and thus there is an advantage that the certainty of the support of the tension material in the load bearing body is reliably improved without complicating the configuration.

引張材の除去作業の容易化を油脂剤の残留、漏出等を伴うことなく実現可能とし、それと同時に、形成作業の容易なアンカーテンドンを具現化した。   The removal of the tensile material can be facilitated without any residual oil or leakage, and at the same time, an uncurtain dong that is easy to form is realized.

図1、図2は、この発明に係る除去アンカー工法に用いて好適な、この発明に係るアンカーテンドン10の概略斜視図、および一部破断の部分平面図であり、図示のように、このアンカーテンドン10は、引張材12と、耐荷体14と、先端保持具16とを備えたものとして概略形成されている。   FIG. 1 and FIG. 2 are a schematic perspective view and a partial plan view of a partially broken uncurtain don 10 according to the present invention suitable for use in the removal anchor method according to the present invention. The tendon 10 is roughly formed as including a tension member 12, a load-bearing body 14, and a tip holder 16.

引張材12としては、たとえばPC鋼より線等のPC鋼線材、あるいは炭素繊維等からなる繊維線材等が利用できるとともに、除去アンカー工法においては、ポリエチレンチューブ等の被覆管13によって被覆された、いわゆるアンボンド型のものが、この引張材として一般的に使用されている。   As the tension member 12, for example, a PC steel wire such as a PC steel wire, or a fiber wire made of carbon fiber or the like can be used. In the removal anchor method, a so-called covering tube 13 such as a polyethylene tube is used. An unbonded type is generally used as the tensile material.

一般に、除去アンカー工法のアンカーテンドンは、この種の引張材を耐荷体に対して組み付けることにより形成されるが、図1、図2に示すように、この発明のアンカーテンドン10は、引張材12を耐荷体14に対してほぼ直線状に組み付けること、およびその先端側方向への軸線移動によってのみ保持解除される先端保持具16によりその先端裸線部分12aを保持することでそれをなし得たことを、その特徴的な構成としている。   In general, the uncurtain dong of the removal anchor method is formed by assembling this kind of tensile material to a load bearing body, but as shown in FIGS. Can be achieved by assembling the load bearing body 14 substantially linearly, and holding the tip bare wire portion 12a by the tip holder 16 that is released only by movement of the axis in the tip side direction. This is the characteristic configuration.

図2に加えて図3および図4を見るとわかるように、耐荷体14は、引張材12の沿設を可能とする、引張材12の軸線に沿って延びる長手形状の軸状本体14aを有してなり、その各端末には、アンカーテンドン10の先端側、つまりアンカー孔の孔底側に配置される先端側支持片14bと、対するその後端側に配置される後端側支持片14cとが、それぞれ一体に設けられている(図1参照)。そして、先端保持具16は、この耐荷体14に対し、たとえば図示のような支持具18によって固定的に連結、支持されるものとして具体化されている。   As shown in FIGS. 3 and 4 in addition to FIG. 2, the load-bearing body 14 includes a longitudinal shaft-shaped main body 14 a that extends along the axis of the tension member 12, which enables the tension member 12 to be installed. Each end thereof has a front end side support piece 14b disposed on the front end side of the uncurtain don 10, that is, the bottom side of the anchor hole, and a rear end side support piece 14c disposed on the rear end side thereof. Are integrally provided (see FIG. 1). The tip holder 16 is embodied as being fixedly connected and supported to the load-bearing body 14 by, for example, a support 18 as shown in the figure.

図2、図3に示すように、この支持具18は、たとえば、一体の大径部18aおよび小径部18bからなる、引張材の先端裸線部分12aの内挿可能な段付き筒状体として形成され、引張材12の被覆管13の先端部に対する大径部の冠着、およびそのカシメのもとで、引張材の被覆管に対して予め一体的に固着されている。   As shown in FIGS. 2 and 3, the support 18 is, for example, a stepped cylindrical body made of an integral large-diameter portion 18 a and a small-diameter portion 18 b that can be inserted into the end bare wire portion 12 a of the tensile material. The large diameter portion is attached to the distal end portion of the cladding tube 13 of the tension material 12 and is crimped to the tension material cladding tube in advance.

図2ないし図4に示すように、耐荷体の後端側支持片14cには、この支持具大径部18aの遊挿可能な大径挿通孔20が、また、耐荷体の前端側支持片14bには、この支持具小径部18bの遊挿可能な、支持具大径部より小径の小径挿通孔22が、それぞれ形成されており、後端側支持片の大径挿通孔を介したその挿通のもとで、耐荷体の軸状本体14aに対する引張材12の沿設配置が可能となるとともに、前端側支持片の小径挿通孔を介して挿通した支持具小径部18bに対する接合のもとで、耐荷体14に対する先端保持具16の固定的な連結、支持、およびこの先端保持具による引張材先端部の保持がはかられている。   As shown in FIGS. 2 to 4, the rear end side support piece 14c of the load bearing body has a large diameter insertion hole 20 into which the support tool large diameter portion 18a can be freely inserted, and the load bearing body front end side support piece. 14b is formed with small-diameter insertion holes 22 smaller than the support tool large-diameter portion, through which the support-tool small-diameter portion 18b can be freely inserted, and through the large-diameter insertion hole of the rear end side support piece. Under the insertion, the tension member 12 can be arranged along the shaft-shaped main body 14a of the load bearing body, and the joint is made to the support tool small-diameter portion 18b inserted through the small-diameter insertion hole of the front end side support piece. Thus, the fixed connection and support of the tip holder 16 to the load-bearing body 14 are supported, and the tip of the tensile material is held by the tip holder.

図2および図4を見るとわかるように、先端保持具16は、たとえば、螺合による相互間の接合の可能な前半部16−1、後半部16−2の組み合わせをその本体としてなり、この本体は、周面をめねじ部24とした挿通孔25を後端側、つまり本体後端部16−2に有する略有底筒状体として概略形成されている。そして、この本体後端部16−2のめねじ部24を、支持具小径部18bに設けられたおねじ部26の螺合を可能なものとすることによって、図2に示すように、支持具小径部のおねじ部26に対する本体後端部16−2の螺着接合のもとでの、耐荷体14に対する先端保持具16および引張材の被覆管13の固定的な連結、支持がはかられる。   As can be seen from FIG. 2 and FIG. 4, the tip holder 16 has, as its main body, a combination of a front half portion 16-1 and a rear half portion 16-2 that can be joined together by screwing, for example. The main body is roughly formed as a substantially bottomed cylindrical body having an insertion hole 25 whose peripheral surface is a female thread portion 24 on the rear end side, that is, the main body rear end portion 16-2. As shown in FIG. 2, the female screw portion 24 of the rear end portion 16-2 of the main body can be screwed with the male screw portion 26 provided in the support small-diameter portion 18b. A fixed connection and support of the tip holder 16 and the tension material cladding tube 13 to the load-bearing body 14 under the screw joint of the main body rear end portion 16-2 to the male thread portion 26 of the small-diameter portion. I can be taken.

この先端保持具16は、その先端側方向への引張材12の軸線移動によってのみ保持解除される構成であり、これは引張材の先端裸線部分12aに対する把持のもとで後端側牽引方向(図中左方)への引張材の軸線移動を規制可能とする把持手段28によってなされるものである。   The front end holding tool 16 is configured to be released only by the axial movement of the tension member 12 in the front end side direction, which is the rear end side pulling direction under the gripping of the front end bare wire portion 12a of the tension member. This is done by the gripping means 28 that can regulate the axial movement of the tensile material (to the left in the figure).

図2および図4に示すように、この先端保持具の把持手段28としては、たとえば、摺動自在なベース部材32に組み付けられた3分割等のクサビ片34を有する構成が利用でき、先端保持具本体の後半部16−2に規定された、後端側に縮径する斜面状のクサビ台36に沿った摺動を可能に、このクサビ片は配設されている。   As shown in FIGS. 2 and 4, as the gripping means 28 of the tip holder, for example, a configuration having a wedge piece 34 such as a three-piece assembly assembled to a slidable base member 32 can be used. The wedge pieces are arranged so as to be slidable along the slope-like wedge base 36 defined in the rear half portion 16-2 of the tool body and having a diameter reduced toward the rear end.

なお、図2に示すように、把持手段のベース部材32は、引張材の先端裸線部分12aの先端面を受ける受動部を兼ねたものであり、また、このベース部材に対しては、たとえばゴムリング38等による弾性的な拘束のもとでクサビ片34が可動に束ねられている。   As shown in FIG. 2, the base member 32 of the gripping means also serves as a passive portion that receives the distal end surface of the tensile wire bare wire portion 12a. For this base member, for example, The wedge pieces 34 are movably bundled under elastic restraint by a rubber ring 38 or the like.

このような構成の把持手段28においては、クサビ台36の縮径方向に一致する後端側方向へのクサビ片34の移動のもとで、引張材の先端裸線部分12aに対する把持が得られ、また、クサビ台の拡径方向に一致する先端側方向へのクサビ片の移動のもとで、引張材の先端裸線部分に対する把持解除が得られる。   With the gripping means 28 having such a configuration, the gripping of the leading end bare wire portion 12a of the tensile material is obtained under the movement of the wedge piece 34 in the rear end side direction that coincides with the diameter reducing direction of the wedge base 36. In addition, it is possible to release the grip on the bare end portion of the tensile material under the movement of the wedge piece in the tip side direction that coincides with the diameter increasing direction of the wedge base.

ここで、図2を見るとわかるように、上述した把持手段のクサビ片34に対しては、たとえば圧縮コイルばね等の付勢手段40からの付勢力が後端側方向に付与されており、この付勢手段からの付勢力による、クサビ台36の縮径方向へのクサビ片の強制移動により、その後端側方向(図中左方)、つまり牽引方向への引張材12の軸線移動が規制されるものとなっている。逆にいえば、この付勢手段(圧縮コイルばね)40の付勢力に抗してクサビ片34を先端保持具16の先端側方向(図中右方)に押し込むことにより、クサビ台36の斜面形状に沿ったクサビ片の拡径のもとで、引張材の先端裸線部分12aに対する把持の解除が可能となる。   Here, as can be seen from FIG. 2, the urging force from the urging means 40 such as a compression coil spring is applied to the wedge piece 34 of the gripping means in the rear end direction, for example. By the forcible movement of the wedge pieces in the direction of diameter reduction of the wedge base 36 by the urging force from the urging means, the axial movement of the tensile member 12 in the rear end direction (leftward in the figure), that is, in the pulling direction is restricted. It is supposed to be. Conversely, by pressing the wedge piece 34 against the urging force of the urging means (compression coil spring) 40 in the distal end side direction (rightward in the figure) of the wedge holder 36, Under the increased diameter of the wedge piece along the shape, it becomes possible to release the gripping of the leading end bare wire portion 12a of the tensile material.

そして、図2および図4に示すように、この発明においては、クサビ片34を引張材の先端裸線部分12aに対する把持解除位置に滞留させるための滞留手段30が、たとえばクサビ片のベース部材32に設けられている。   As shown in FIGS. 2 and 4, in the present invention, the staying means 30 for staying the wedge piece 34 in the holding release position with respect to the bare end wire portion 12a of the tensile material is, for example, the base member 32 of the wedge piece. Is provided.

図2に示すように、この滞留手段30としては、たとえば、先端保持具本体の前半部16−1内に規定された周面凹部42に挿入、係合可能な係合ピン44と、この係合ピンをその突出方向に押し出し可能とする、圧縮コイルばね等からなる押出手段46との組み合わせが例示でき、たとえば図5に示すように、クサビ片34が付勢手段40の付勢力に抗して特定位置まで押し込まれたとき、係合ピン44が押出手段(圧縮コイルばね)46の付勢力のもとで周面凹部に挿入、係合することでその戻り、つまりはクサビ台36の縮径方向(後端側方向)へのクサビ片の移動を阻止するものとして、この滞留手段は構成されている。   As shown in FIG. 2, the staying means 30 includes, for example, an engagement pin 44 that can be inserted into and engaged with a circumferential recess 42 defined in the front half 16-1 of the tip holder main body, and this engagement. A combination with the push-out means 46 made of a compression coil spring or the like that enables the mating pin to be pushed out in the protruding direction can be exemplified. For example, the wedge piece 34 resists the urging force of the urging means 40 as shown in FIG. When the engagement pin 44 is pushed into a specific position, the engagement pin 44 is returned to the circumferential recess by being inserted into and engaged with the peripheral surface under the urging force of the pushing means (compression coil spring) 46, that is, the wedge base 36 is contracted. This staying means is configured to prevent the movement of the wedge pieces in the radial direction (rear end side direction).

上述のような引張材12、耐荷体14および先端保持具16の組み合わせを有してなるアンカーテンドン10は、概略以下のように組み立てられる。   The uncurtain dong 10 having the combination of the tension member 12, the load bearing member 14 and the tip holding tool 16 as described above is assembled as follows.

図3に示すように、被覆管13の先端部に支持具18の固着された引張材12を、耐荷体の後端側支持片14cから、その大径挿通孔20を介して挿通し、その先端側支持片14bの小径挿通孔22を介しためねじ部24へのおねじ部26の螺着により、支持具での、耐荷体14に対する先端保持具本体の後半部16−2の固定的な連結、支持がまず行われる(図2、図4参照)。   As shown in FIG. 3, the tension member 12 having the support 18 fixed to the tip of the cladding tube 13 is inserted from the rear end side support piece 14c of the load bearing body through the large-diameter insertion hole 20, By fixing the male threaded portion 26 to the threaded portion 24 through the small-diameter insertion hole 22 of the distal end side support piece 14b, the rear end portion 16-2 of the distal end holder body with respect to the load bearing body 14 is fixed by the supporter. First, connection and support are performed (see FIGS. 2 and 4).

そして、次に、この先端保持具本体の後端部16−2に対する先端保持具16の各部材の組み付けが行われる。   Then, each member of the tip holder 16 is assembled to the rear end portion 16-2 of the tip holder body.

まず、先端保持具16の本体内に挿入された引張材の先端裸線部分12a周りに、把持手段のクサビ片34が、ベース部材32に組み付けられた状態で配設され、その後、付勢手段40の付勢力に抗しつつ、先端保持具本体の前半部16−1を後半部16−2に対して一体的に螺着接合することにより、耐荷体14に対する引張材12および先端保持具16の組み付けは行われる。   First, the wedge piece 34 of the gripping means is disposed in the state of being assembled to the base member 32 around the bare bare wire portion 12a of the tensile material inserted into the main body of the tip holding tool 16, and then the biasing means. 40, the front half portion 16-1 of the tip holder main body is integrally screwed and joined to the rear half portion 16-2 while resisting the urging force of 40, so that the tension member 12 and the tip holder 16 against the load bearing body 14 are obtained. Is assembled.

なお、図2、図4に示すように、一つの耐荷体14に対しては、たとえば2個の先端保持具16が固定的に連結、支持される。つまり、一つの耐荷体14と2本の引張材12との組み合わせが一つの小単位となり、これを図1に示すように複数組分組み付けることによって、地盤のアンカー孔に挿入配置されるアンカーテンドン10が形成される。   As shown in FIGS. 2 and 4, for example, two tip holders 16 are fixedly connected and supported to one load-bearing body 14. That is, the combination of one load-bearing body 14 and two tension members 12 becomes one small unit, and by assembling a plurality of sets as shown in FIG. 10 is formed.

このアンカーテンドン10は、地盤のアンカー孔に対して挿入配置され、アンカー孔内へのグラウト後における、その後端側での牽引に伴うこの引張材12の緊張定着により、地盤におけるアンカーの定着、施工は行われる。   The uncurtain dong 10 is inserted and arranged with respect to the anchor hole of the ground, and after the grouting into the anchor hole, the anchor material of the anchor is fixed and constructed by the tension fixation of the tensile material 12 accompanying the traction on the rear end side. Is done.

なお、アンカー孔に対するグラウト、およびその後の引張材に対する緊張定着は従来の除去アンカー工法と同じであり、それ自体はこの発明の趣旨でないため、ここでの詳細な説明は省略する。   The grout for the anchor hole and the subsequent tension fixation for the tensile material are the same as in the conventional removal anchor method, and are not themselves the gist of the present invention.

そして、アンカーとしての施工目的の達成後、その先端側方向への軸線移動力を定着力解除後の引張材12に対して付与する。通常は、定着力解除によって収縮する際に発生する収縮力のもとで、引張材12がその先端側方向に軸線移動するため、この収縮力を先端側方向への軸線移動力として利用することができる。   And after achievement of the construction purpose as an anchor, the axial line moving force to the tip side direction is given to tensile material 12 after fixing power release. Normally, since the tension member 12 moves axially in the distal direction under the contracting force generated when contracting due to the release of the fixing force, this contracting force should be used as the axial moving force in the distal direction. Can do.

把持手段のベース部材32は、その先端側方向への引張材12の軸線移動のもとで付勢手段40の付勢力に抗してその先端側方向に移動される。そして、このベース部材32、つまりクサビ片34が付勢手段40の付勢力に抗して押し込まれ、ベース部材の滞留手段30によってこのクサビ片が引張材の先端裸線部分12aに対する把持解除位置に保持、滞留されれば、図5に示すように、引張材の先端裸線部分は把持のないフリーな状態となるため、把持手段28による把持解除状態、つまりは先端保持具16による保持の解除下において、図6に示すように先端保持具から引張材12を引き抜くことで、地中からの引張材の除去が可能となる。   The base member 32 of the gripping means is moved in the tip side direction against the biasing force of the biasing means 40 under the axial movement of the tension member 12 in the tip side direction. The base member 32, that is, the wedge piece 34 is pushed against the urging force of the urging means 40, and the staying means 30 of the base member brings the wedge piece into a grip releasing position with respect to the leading end bare wire portion 12 a of the tensile material. If held and retained, as shown in FIG. 5, the end bare wire portion of the tensile material is in a free state without gripping, so that the gripping state by the gripping means 28, that is, the release by the tip holder 16 is released. Below, as shown in FIG. 6, the tensile material 12 can be removed from the ground by pulling out the tensile material 12 from the tip holder.

なお、ここでは定着力解除による収縮力を利用して引張材12をその先端側方向に軸線移動させるものとしているが、この収縮力が十分に発生されなかった場合においては、緊張力解除後の引張材の後端を、ハンマー等によってその先端側方向に打ち込んでもよい。   Here, it is assumed that the tension member 12 is moved axially in the direction of the distal end side by using the contraction force due to the release of the fixing force, but when the contraction force is not sufficiently generated, The rear end of the tensile material may be driven in the direction of the front end with a hammer or the like.

上記のように、この発明の除去アンカー工法においては、それに用いられるアンカーテンドンの引張材12が、耐荷体14に対してほぼ直線状に組み付けられているにすぎないため、アンカーとしての施工目的の達成後にその引張材を引き抜いて地中から除去する際には、この引張材を、地中に埋設された状態での延長線上で直線的に単純に牽引し引き抜けば足りる。つまり、従来の除去アンカー工法での引き抜き作業のような、略U形状に折り返された引張材を引き抜くときのような多大な抵抗力に抗する牽引力は必要ないため、その除去作業の容易化が十分にはかられる。   As described above, in the removal anchor method of the present invention, the uncureddon tension member 12 used in the removal anchor method is merely assembled substantially linearly with respect to the load-bearing body 14, so When the tensile material is pulled out and removed from the ground after the achievement, it is sufficient that the tensile material is simply pulled linearly on the extension line in the state of being buried in the ground and pulled out. That is, there is no need for a traction force that resists a great resistance force when pulling a tensile material folded back into a substantially U shape, such as a pulling operation in the conventional removal anchor method. It is enough.

特に、略U形状に折り返された引張材を引き抜く際に要求されるような、たとえば吊り上げレッカー等の大型機械による牽引力は不要となり、実験時の実績からいうと、作業者の手による引き抜きさえも可能であることから、引き抜きのための機械、装置等を用いることなくその除去作業、つまりは引張材12の除去作業が可能となる。つまり、吊り上げレッカー等の大型機械が不要となることから、その作業現場にこのような大型機械を設置する用地を確保する必要がないため、現場スペースを問うことなく、その除去作業が行える。従って、この発明の除去アンカー工法は、汎用性に優れた工法であるということができる。   In particular, the traction force required by a large machine such as a lifting wrecker, which is required when pulling a tensile material folded back in a substantially U shape, is no longer necessary. Since it is possible, the removal operation, that is, the removal operation of the tension member 12 can be performed without using a machine or device for drawing out. In other words, since a large machine such as a lifting wrecker is not required, it is not necessary to secure a site for installing such a large machine at the work site, so that the removal work can be performed without questioning the site space. Therefore, it can be said that the removal anchor method of this invention is a method with excellent versatility.

また、引張材12の引き抜きの妨げとなる多大な抵抗力が作用しないため、引張材のための潤滑材となる油脂剤がこの引張材から省略できる。つまり、油脂剤が地中に残された場合の地中汚染、および引張材12の引き抜きの際におけるその周辺外部への油脂剤の漏出、飛散等の不具合がなくなるため、この発明の除去アンカー工法は、環境保全等にも十分に貢献できるものということができる。   Further, since a great resistance force that hinders the pulling out of the tensile material 12 does not act, an oil and fat agent serving as a lubricant for the tensile material can be omitted from the tensile material. That is, since there are no problems such as underground contamination when the oil or grease is left in the ground, and leakage or scattering of the oil or grease to the outside of the periphery when the tension member 12 is pulled out, the removal anchor method of the present invention It can be said that it can fully contribute to environmental conservation.

そして、この発明の除去アンカー工法のアンカーテンドン10によれば、構成の複雑化等を伴うことなく、上記除去アンカー工法を適切に遂行することが可能となる。   And according to the uncurtain dong 10 of the removal anchor method of this invention, it becomes possible to perform the said removal anchor method appropriately, without accompanying the complexity of a structure.

また、先端保持具16によるその先端部の保持のもとで、引張材12を耐荷体14に対してほぼ直線状に組み付ければ足りるため、アンカーテンドン10の形成作業が確実に容易化される。そして、ほぼ直線状の引張材12を耐荷体14に対して組み付ければ足りるため、アンカーテンドン10としての細径化が容易に可能となることから、この点からも、アンカーテンドンの形成作業の容易化が十分にはかられる。   In addition, since it is sufficient that the tension member 12 is assembled substantially linearly with respect to the load-bearing body 14 while the tip end holder 16 holds the tip portion, the operation of forming the uncurtain dong 10 is surely facilitated. . Since it is sufficient to assemble the substantially straight tension member 12 to the load bearing member 14, it is possible to easily reduce the diameter of the uncurtain dong 10. From this point as well, the operation of forming the uncurtain dong Easy to use.

ここで、この発明の実施例においては、先端保持具の把持手段28をベース部材32とクサビ片34とクサビ台36との組み合わせとして、また、滞留手段30を周面凹部42と係合ピン44と押出手段46との組み合わせとして、それぞれ具体化しているが、把持手段は、後端側牽引方向への引張材12の軸線移動を規制可能とし、かつ先端側方向への引張材の軸線移動によってのみ保持解除されるものであれば足り、また、滞留手段は、把持手段を引張材に対する把持解除位置に滞留させる機能を有するものであれば足りるため、いずれもこの実施例の形態に限定されず、他の形態のものをそれぞれに利用してもよい。   Here, in the embodiment of the present invention, the gripping means 28 of the tip holder is a combination of the base member 32, the wedge piece 34 and the wedge base 36, and the staying means 30 is the peripheral surface recess 42 and the engagement pin 44. The gripping means can regulate the axial movement of the tensile material 12 in the rear end side pulling direction and can be controlled by the axial movement of the tensile material in the front end side direction. It is sufficient if only the holding means is released, and the retention means is not limited to the form of this embodiment because it is sufficient if the holding means has a function of retaining the holding means at the holding release position with respect to the tensile material. Other forms may be used for each.

また、この実施例においては、耐荷体14を2本の引張材12の保持を前提とした、いわゆる2本使いの形態として具体化しているが、これに限定されず、たとえば、図1に符号14−1として示す、1本の引張材の保持を前提とした、いわゆる1本使いの形態に、この耐荷体を形成することもできる。   Further, in this embodiment, the load bearing body 14 is embodied as a so-called two-use form on the premise that the two tension members 12 are held, but the present invention is not limited to this. This load-bearing body can also be formed in a so-called single-use configuration on the premise of holding a single tensile material shown as 14-1.

このような1本使いの場合、たとえば、耐荷体の軸状本体14aを中空とし、その中空部内に引張材12を挿通配置することが好ましい。   In the case of such a single use, for example, it is preferable that the shaft-shaped main body 14a of the load bearing body is hollow, and the tensile member 12 is inserted and disposed in the hollow portion.

さらに、この実施の形態においては、一体の大径部18a、小径部18bを持つ段付き筒状体として支持具18を具体化しているが、耐荷体14に対する先端保持具16の固定的な連結、支持を可能とする形態であれば足りるため、これに限定されず他の形態としてもよい。   Further, in this embodiment, the support tool 18 is embodied as a stepped cylindrical body having an integral large diameter portion 18a and small diameter portion 18b, but the tip holder 16 is fixedly connected to the load bearing body 14. Any form that can be supported is sufficient, and the present invention is not limited to this.

しかしながら、この実施例で示すこの支持具18の形態であれば、耐荷体14に対する被覆管13および先端保持具16の連結、支持が構成の複雑化を伴うことなく容易に確保できるため、この点からも、アンカーテンドン10の形成作業の容易化が十分にはかられる。   However, with the form of the support 18 shown in this embodiment, the connection and support of the cladding tube 13 and the tip holder 16 to the load bearing body 14 can be easily secured without complicating the configuration. Therefore, the formation of the uncurtain dong 10 can be facilitated.

また、この実施の形態においては、耐荷体の後端側支持片14cに支持具大径部18aの遊挿を可能とする大径挿通孔20を設けているため、結束バンド等の別部材を用いることなく、耐荷体14に対する引張材12の支持が可能となる。つまり、この構成によれば、耐荷体14における引張材の支持の確実性が、構成の複雑化等を伴うことなく確実に向上される。   Further, in this embodiment, since the large-diameter insertion hole 20 that allows loose insertion of the support large-diameter portion 18a is provided in the rear end support piece 14c of the load bearing body, another member such as a binding band is provided. Without using it, the tension member 12 can be supported on the load-bearing body 14. That is, according to this structure, the certainty of the support of the tension material in the load-bearing body 14 is reliably improved without complicating the structure.

上述した実施の形態は、この発明を説明するためのものであり、この発明を何等限定するものでなく、この発明の技術範囲内で変形、改造等の施されたものも全てこの発明に包含されることはいうまでもない。   The above-described embodiments are for explaining the present invention, and do not limit the present invention. All modifications, alterations, and the like within the technical scope of the present invention are included in the present invention. It goes without saying that it is done.

この発明の除去アンカー工法のアンカーテンドンの概略斜視図である。It is a schematic perspective view of the uncurtain don of the removal anchor method of this invention. 把持手段での把持状態における、アンカーテンドンの一部破断の概略平面図である。It is a schematic plan view of a partial fracture of the uncurtain don in the gripping state by the gripping means. 耐荷体の後端側における、アンカーテンドンの部分分解斜視図である。It is a partial exploded perspective view of an uncurtain dong in the rear end side of a load bearing object. 耐荷体の前端側における、アンカーテンドンの部分分解斜視図である。It is a partial exploded perspective view of an uncurtain dong in the front end side of a load bearing object. 把持手段での把持解除状態における、アンカーテンドンの部分断面図である。It is a fragmentary sectional view of an uncurtain dong in the state of grasp release by a grasping means. 引張材の引き抜き状態を示す、アンカーテンドンの部分断面図である。It is a fragmentary sectional view of an uncurtain dong showing the pulling state of a tension material.

符号の説明Explanation of symbols

10 除去アンカー工法のアンカーテンドン
12 引張材
13 被覆管
14 耐荷体
16 先端保持具
18 支持具
28 把持手段
30 滞留手段
DESCRIPTION OF SYMBOLS 10 Uncurtain Don of removal anchor method 12 Tensile material 13 Cladding tube 14 Load-bearing body 16 Tip holding tool 18 Support tool 28 Holding means 30 Retention means

Claims (4)

被覆管で被覆されたアンボンド型引張材の先端裸線部分を、その先端側方向への軸線移動によってのみ保持解除される先端保持具により保持し、当該引張材をこの先端保持具と共に耐荷体に対してほぼ直線状に組み付けることにより、地盤のアンカー孔に挿入配置されるアンカーテンドンを形成するとともに、アンカー孔内へのグラウト後における、その後端側での牽引に伴うこの引張材の緊張定着により、これを地盤に対するアンカーの定着、施工とし、
アンカーとしての施工目的の達成後、その先端側方向への軸線移動力を定着力解除後の上記引張材に付与し、上記先端保持具および上記被覆管に対する先端側方向へのこの引張材の軸線移動に伴った、この先端保持具による保持の解除下において、引張材をその後端側から引き抜いて地中から除去する除去アンカー工法。
The bare wire portion of the unbonded tensile material covered with the cladding tube is held by a tip holder that is released only by axial movement in the direction of the tip, and the tensile material is attached to the load-bearing body together with the tip holder. As a result, the uncurtain dong inserted and arranged in the anchor hole of the ground is formed by assembling in a substantially straight line, and the tension of the tensile material due to traction on the rear end side after grouting into the anchor hole , This is anchor anchoring and construction to the ground,
After achieving the purpose of the construction as an anchor, the axial movement force in the tip side direction is applied to the tension material after the fixing force is released, and the axis of the tension material in the tip side direction with respect to the tip holder and the cladding tube A removal anchor method in which the tensile material is pulled out from the rear end side and removed from the ground under the release of the holding by the tip holding tool accompanying the movement.
引張材の緊張定着によるアンカーとしての施工目的の達成後に、当該引張材をその後端側から引き抜いて地中から除去する除去アンカー工法のアンカーテンドンにおいて、
被覆管によって被覆されたアンボンド型引張材と;
ほぼ直線状での上記引張材の支持を可能とする、引張材の軸線方向に延びた長手形状の軸状本体を有した耐荷体と;
所定の支持具によって上記耐荷体の持つ先端側支持片に固定的に連結、支持されるとともに、上記引張材の先端裸線部分に対する把持のもとで後端側牽引方向への当該引張材の軸線移動を規制可能とする把持手段、およびこの把持手段を引張材に対する把持解除位置に滞留させるための滞留手段を、その本体内部に有してなる先端保持具と;
を備えてなり、上記把持手段にその先端裸線部分の把持された状態における後端側からの上記引張材の牽引時、当該把持手段によるその後端側牽引方向への移動規制のもとで上記先端保持具での当該引張材の保持がはかられるとともに、
上記先端保持具、およびこれと一体的に連結、支持された上記被覆管に対する、その先端側方向への上記引張材の軸線移動により、上記把持手段をその把持解除位置に移動、滞留可能としたことを特徴とする除去アンカー工法のアンカーテンドン。
In the uncurtain dong of the removal anchor method that pulls out the tensile material from the rear end side and removes it from the ground after the achievement of the construction purpose as an anchor by tension fixation of the tensile material,
An unbonded tensile material covered by a cladding tube;
A load-bearing body having a longitudinal shaft-like main body extending in the axial direction of the tensile material, which enables the tensile material to be supported in a substantially straight line;
It is fixedly connected to and supported by the front end side support piece of the load bearing body by a predetermined support tool, and the tension material in the rear end side pulling direction is gripped with respect to the front end bare wire portion of the tension material. A tip holding tool having inside the main body gripping means capable of restricting movement of the axis, and staying means for retaining the gripping means at a grip release position for the tensile material;
When pulling the tension member from the rear end side in a state where the tip bare wire portion is gripped by the gripping means, the gripping means is controlled to move in the rear end pulling direction by the gripping means. While holding the tension material with the tip holder,
The gripping means can be moved to and retained at the grip release position by the axial movement of the tensile material in the tip side direction with respect to the tip holder and the cladding tube connected and supported integrally therewith. Uncurtain Don of removal anchor method characterized by that.
前記先端保持具の本体が、その周面をめねじ部とした挿通孔を後端側に有する略有底筒状体として概略形成されるとともに、この先端保持具を前記耐荷体に対して固定的に連結、支持する前記支持具が、一体の大径部および小径部からなる、引張材の先端裸線部分の内挿可能な段付き筒状体としてなり、
前記引張材の先端裸線部分の挿通を伴った、被覆管先端部に対する上記大径部の一体的な冠着のもとで、前記支持具を被覆管先端部に一体的に固着し、その周面をおねじ部としたこの支持具の上記小径部を、前記耐荷体の先端側支持片に設けられた、前記支持具の上記大径部より小径の小径挿通孔を介して、前記先端保持具本体の上記めねじ部に螺着接合することにより、これを前記支持具による前記耐荷体に対する前記先端保持具の固定的な連結、および前記耐荷体に対する前記引張材の支持とする請求項2記載の除去アンカー工法のアンカーテンドン。
The main body of the tip holder is roughly formed as a substantially bottomed cylindrical body having an insertion hole on the rear end side with the peripheral surface as a female thread portion, and the tip holder is fixed to the load-bearing body. The support device to be connected and supported is a stepped cylindrical body that is composed of an integral large-diameter portion and a small-diameter portion, and can be inserted into the end bare wire portion of the tensile material,
Under the integral crowning of the large-diameter portion with respect to the cladding tube tip, with the insertion of the bare bare wire portion of the tensile material, the support is integrally fixed to the cladding tube tip, The distal end of the small diameter portion of the support having a male thread as a peripheral surface is provided in a distal end side support piece of the load bearing body through a small diameter insertion hole having a smaller diameter than the large diameter portion of the support. The screw is joined to the female thread portion of the holder main body so that the tip holder is fixedly connected to the load-bearing body by the support and the tensile material is supported to the load-bearing body. The uncurtain dong of the removal anchor method of 2 description.
前記耐荷体が、前記先端側支持片に対する後端側支持片を有して形成され、前記支持具の大径部の挿通可能な大径挿通孔をこの後端側支持片に設けることにより、この後端側支持片による前記引張材の支持を可能とした請求項3記載の除去アンカー工法のアンカーテンドン。
The load-bearing body is formed having a rear end side support piece with respect to the front end side support piece, and by providing the rear end side support piece with a large diameter insertion hole into which the large diameter portion of the support can be inserted, The uncurtain dong for the removal anchor method according to claim 3, wherein the tension member can be supported by the rear end side support piece.
JP2004175305A 2004-06-14 2004-06-14 Removal anchor method and its anchor tendon Pending JP2005351028A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007177486A (en) * 2005-12-27 2007-07-12 Nozaki Tsutomu Anchor fixing tool
KR100997673B1 (en) * 2010-03-12 2010-12-01 이인귀 Structure of pemanent anchor
KR101002054B1 (en) * 2010-03-29 2010-12-17 (주)지성이씨에스 Fixture apparatus for connecting strand used multi-hole and the anchor using thereof
JP2011144518A (en) * 2010-01-12 2011-07-28 Nozaki Toshihiko Fixing device for anchor capable of removing and newly installing steel wire
WO2011118925A1 (en) * 2010-03-25 2011-09-29 Lee In-Kwi Anchor structure for preventing a steel wire from being twisted
JP2020200700A (en) * 2019-06-12 2020-12-17 日特建設株式会社 Ground anchor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007177486A (en) * 2005-12-27 2007-07-12 Nozaki Tsutomu Anchor fixing tool
JP2011144518A (en) * 2010-01-12 2011-07-28 Nozaki Toshihiko Fixing device for anchor capable of removing and newly installing steel wire
KR100997673B1 (en) * 2010-03-12 2010-12-01 이인귀 Structure of pemanent anchor
WO2011118925A1 (en) * 2010-03-25 2011-09-29 Lee In-Kwi Anchor structure for preventing a steel wire from being twisted
KR101002054B1 (en) * 2010-03-29 2010-12-17 (주)지성이씨에스 Fixture apparatus for connecting strand used multi-hole and the anchor using thereof
JP2020200700A (en) * 2019-06-12 2020-12-17 日特建設株式会社 Ground anchor
JP7189648B2 (en) 2019-06-12 2022-12-14 日特建設株式会社 ground anchor

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