JP5217216B2 - Anchor head fixing structure, anchor head fixing method, and grout injection method - Google Patents

Anchor head fixing structure, anchor head fixing method, and grout injection method Download PDF

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JP5217216B2
JP5217216B2 JP2007097676A JP2007097676A JP5217216B2 JP 5217216 B2 JP5217216 B2 JP 5217216B2 JP 2007097676 A JP2007097676 A JP 2007097676A JP 2007097676 A JP2007097676 A JP 2007097676A JP 5217216 B2 JP5217216 B2 JP 5217216B2
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anchor
hole
grout material
main body
outer peripheral
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JP2008255615A (en
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正 金子
敏己 須藤
眞弘 佐藤
登美夫 森脇
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Obayashi Corp
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Description

本発明は、アンカーの頭部定着構造、アンカーの頭部定着方法及びグラウト材の注入方法に関し、特に、既存の構造物の耐震補強をアンカーにより行う際に有効なアンカーの頭部定着構造、アンカーの頭部定着方法、及びグラウト材の注入方法に関する。   The present invention relates to an anchor head fixing structure, an anchor head fixing method, and a grout injection method, and more particularly to an anchor head fixing structure and an anchor that are effective when performing seismic reinforcement of an existing structure with an anchor. The present invention relates to a head fixing method and a grout material injection method.

一般に、構造物を新築する場合、地震時等に発生する引抜き力によって構造物が転倒等するのを防止するため、構造物とアンカーの定着地盤との間に永久アンカーを打設し、永久アンカーの先端を定着地盤に定着させ、永久アンカーに緊張力を付与した状態で永久アンカーの上端を構造物に定着させることで、永久アンカーに上記引抜き力に抵抗する引抜き抵抗力を持たせることが行われている。   Generally, when a new structure is built, a permanent anchor is placed between the structure and the anchoring ground of the anchor to prevent the structure from toppling over due to the pulling force generated during an earthquake. By fixing the tip of the anchor to the fixing ground and fixing the upper end of the permanent anchor to the structure in a state where tension is applied to the permanent anchor, the permanent anchor can have a pulling resistance force that resists the pulling force. It has been broken.

上記のような新築の構造物に対して永久アンカーにより耐震性能を付与する場合、その設計、施工の指針が建築基準法で定められているので、施工者は永久アンカーの設計をし、構造物の設計をした後に、指定の検査機関に対して建築確認の申請をし、建築確認を受けた後に永久アンカーの施工、及び構造物の施工を行っている。
建築地盤アンカー設計施工指針・同解説、２００１年１月２０日、第２版第１刷、発行所；日本建築学会 When providing seismic performance to permanent structures such as the above using permanent anchors, the construction and design guidelines are stipulated in the Building Standards Act. After designing, the application for building confirmation is made to the designated inspection organization, and after receiving the building confirmation, permanent anchor construction and structure construction are performed.
Architectural ground anchor design and construction guidelines and explanation, January 20, 2001, 2nd edition, 1st printing, publisher: Architectural Institute of Japan

ところで、上記の指針は新設の構造物を対象とし、既存の構造物は考慮していないため、既存の構造物に対して永久アンカーにより耐震性能を付与する場合には、耐震改修促進法に基づいて、構造物の耐震診断（コンクリート強度等の耐震性能の調査）を行い、その耐震診断結果に基づいて耐震補強の設計（永久アンカーの設計）を行い、指定の検査機関に対して耐震改修計画の申請を行い、耐震改修計画の確認を受けた後に、永久アンカーの施工を行い、構造物に耐震補強を施す必要がある。   By the way, the above guidelines are for new structures and do not take into account existing structures. Therefore, when providing seismic performance with permanent anchors for existing structures, the seismic retrofitting promotion law is applied. The seismic diagnosis of the structure (inspection of seismic performance such as concrete strength), seismic reinforcement design (permanent anchor design) based on the seismic diagnosis result, and seismic retrofit plan for the designated inspection organization After receiving the application and confirming the seismic retrofit plan, it is necessary to construct permanent anchors and provide seismic reinforcement to the structure.

しかし、既存の構造物に対して耐震補強を行う場合には、既存の構造物の強度に見合う永久アンカーしか打設することができないため、例えば、耐震補強に１００トンの永久アンカーが必要な場合であっても、構造物が５０トンの永久アンカーにしか耐えられない強度の場合には、５０トンの永久アンカーしか打設することができず、構造物に所要の耐震性能を付与することができない。   However, when performing seismic reinforcement on an existing structure, only permanent anchors that match the strength of the existing structure can be placed. For example, when 100 tons of permanent anchors are required for seismic reinforcement However, if the structure is strong enough to withstand only 50 tons of permanent anchors, only 50 tons of permanent anchors can be placed, and the structure can be provided with the required seismic performance. Can not.

本発明は、上記のような従来の問題に鑑みなされたものであって、既存の構造物に対して所要の耐震性能を付与することができる、アンカーの頭部定着構造、アンカーの頭部定着方法、及びグラウト材の注入方法を提供することを目的とする。   The present invention has been made in view of the conventional problems as described above, and can provide a required anchorage performance to an existing structure, and an anchor head fixing structure and anchor head fixing. It is an object to provide a method and a method for injecting a grout material.

上記のような課題を解決するために、本発明は、以下のような手段を作用している。
請求項１に係る発明は、既存の構造物の構造体を貫通してアンカーの定着地盤に達する孔を設け、該孔内にアンカーを打設して該アンカーの先端を前記定着地盤に定着させ、該アンカーの上端を前記構造体に支圧板を介して頭部定着させるアンカーの頭部定着構造であって、前記孔の開口部に管部材を設け、前記管部材は、前記孔内に挿入されるとともに、前記孔の開口端部から所定の深さまで達する長さに形成される筒状の本体部を有し、 前記本体部には内外周面間を貫通する孔が複数箇所に設けられ、該孔を介して該本体部
の内外周面間をグラウト材が流通可能に構成されていることを特徴とする。 In order to solve the above problems, the present invention operates the following means.
According to the first aspect of the present invention, there is provided a hole that penetrates the structure of an existing structure and reaches the anchoring ground of the anchor, and an anchor is placed in the hole to fix the tip of the anchor to the anchoring ground. An anchor head fixing structure in which an upper end of the anchor is fixed to the structure body via a support plate, and a pipe member is provided at an opening of the hole, and the pipe member is inserted into the hole. And having a cylindrical main body formed to reach a predetermined depth from the opening end of the hole, and the main body is provided with a plurality of holes penetrating between the inner and outer peripheral surfaces. The grout material can be distributed between the inner and outer peripheral surfaces of the main body through the hole.

本発明によるアンカーの頭部定着構造によれば、孔の開口部には管部材が設けられているので、この管部材によって孔の開口部の強度を高めることができ、アンカーに付与する緊張力によって孔の開口部が圧壊されるのを防止できる。また、孔内に挿入される管部材の本体部により、アンカーに緊張力を付与した際に孔の開口部が圧壊するのを防止できる。さらに、孔内にグラウト材を注入した際に、管部材の本体部の内外周面間を貫通する孔を介して本体部の内外周面間でグラウト材が流通し、管部材の内外周面にグラウト材が充填され、管部材の本体部の外周面がグラウト材を介して孔の内周面に定着され、本体部の内周面にグラウト材を介してアンカーが定着されることになる。支圧板は、アンカーに緊張力を付与したときに、構造体の強度以上の応力が作用しない大きさに形成されているので、構造体が圧壊等するのを防止できることになる。   According to the anchor head fixing structure of the present invention, since the pipe member is provided in the opening of the hole, the strength of the opening of the hole can be increased by this pipe member, and the tension force applied to the anchor Can prevent the opening of the hole from being crushed. Moreover, it can prevent that the opening part of a hole is crushed when the tension | tensile_strength is provided to an anchor with the main-body part of the pipe member inserted in a hole. Further, when the grout material is injected into the hole, the grout material is circulated between the inner and outer peripheral surfaces of the main body portion through the holes penetrating between the inner and outer peripheral surfaces of the main body portion of the tube member, and the inner and outer peripheral surfaces of the pipe member. The outer peripheral surface of the main body portion of the pipe member is fixed to the inner peripheral surface of the hole through the grout material, and the anchor is fixed to the inner peripheral surface of the main body portion via the grout material. . Since the bearing plate is formed in such a size that stress greater than the strength of the structure does not act when tension is applied to the anchor, the structure can be prevented from being crushed.

請求項３に係る発明は、請求項１又は２に記載のアンカーの頭部定着構造であって、前記支圧板の背面に補強板を設け、該補強板及び前記支圧板を介して前記アンカーの頭部を前記構造体に定着させたことを特徴とする。   The invention according to claim 3 is the anchor head fixing structure according to claim 1 or 2, wherein a reinforcing plate is provided on the back surface of the bearing plate, and the anchor of the anchor is interposed via the reinforcing plate and the bearing plate. The head is fixed to the structure.

本発明によるアンカーの頭部定着構造によれば、アンカーの上端は支圧板及び補強板を介して構造体に頭部定着されることになるので、アンカーに付与する緊張力を支圧板及び補強板によって分散することができ、構造体の強度以上の緊張力をアンカーに付与することができ、構造物に所要の耐震性能を付与することができる。この場合、支圧板の背面には補強板が設けられているので、支圧板の曲げ耐力を高めることができる。  According to the anchor fixing structure of the anchor according to the present invention, the upper end of the anchor is fixed to the structure body via the bearing plate and the reinforcing plate, so that tension force applied to the anchor is applied to the bearing plate and the reinforcing plate. The tension can be applied to the anchor more than the strength of the structure, and the required seismic performance can be provided to the structure. In this case, since the reinforcing plate is provided on the back surface of the bearing plate, the bending strength of the bearing plate can be increased.

請求項２に係る発明は、請求項１に記載のアンカーの頭部定着構造であって、前記本体部の上端には、鍔状のフランジ部が一体又は別体に設けられ、該フランジ部が前記孔の開口周縁部に載置されていることを特徴とする。 The invention according to claim 2 is the anchor head fixing structure according to claim 1 , wherein a flange-like flange portion is integrally or separately provided at the upper end of the main body portion, and the flange portion is It is mounted in the opening peripheral part of the said hole, It is characterized by the above-mentioned.

本発明によるアンカーの頭部定着構造によれば、孔内に挿入される管部材の本体部と、孔の開口周縁部に載置されるフランジ部との協働により、アンカーに緊張力を付与した際、に孔の開口部が圧壊するのを防止できることになる。   According to the anchor head fixing structure of the present invention, tension is applied to the anchor by the cooperation of the main body portion of the pipe member inserted into the hole and the flange portion placed on the opening peripheral edge portion of the hole. In this case, the opening of the hole can be prevented from being crushed.

本発明によるアンカーの頭部定着方法によれば、アンカーの上端は支圧板を介して構造体に頭部定着されることになるので、アンカーに付与する緊張力を支圧板によって分散することができ、構造体の強度以上の緊張力をアンカーに付与することができる。   According to the anchor head fixing method of the present invention, since the upper end of the anchor is fixed to the structure body via the bearing plate, the tension applied to the anchor can be dispersed by the bearing plate. The tension force higher than the strength of the structure can be applied to the anchor.

請求項３に係る発明は、既存の構造物の構造体を貫通してアンカーの定着地盤に達する孔を設け、該孔内にアンカーを打設して該アンカーの先端を前記定着地盤に定着させ、該アンカーの上端を支圧板を介して前記構造体に頭部定着させるアンカーの頭部定着方法であって、前記孔の開口部に管部材を設け、前記管部材は、前記孔内に挿入されるとともに、前記孔の開口端部から所定の深さまで達する長さに形成される筒状の本体部を有し、前記本体部に内外周面間を貫通する孔を複数箇所に設け、該孔を介して該本体部の内外周面間をグラウト材が流通可能に構成したことを特徴とする。
請求項４に係る発明は、既存の構造物の構造体を貫通してアンカーの定着地盤に達する孔を設ける工程と、該孔内に、上端部に鍔状のフランジ部が一体又は別体に設けられた管部材及びアンカーを、前記フランジ部が前記孔の開口周縁部に載置されるように挿入する工程と、前記アンカーのシース管の内側及び外側にグラウト材を充填し、該シース管の外側のグラウト材を前記孔の開口端部まで行き渡させるグラウト材注入工程と、前記アンカーの頭部を前記構造体に支圧板及び前記フランジ部を介して頭部定着させる工程とを備えたアンカーの頭部定着方法に使用されるグラウト材の注入方法であって、前記管部材にその内外周面間を貫通する孔を複数箇所に設け、前記グラウト材注入工程において、前記シース管の外側にグラウト材を充填する際に、前記管部材の複数の孔を介して前記管部材の内外周面間でグラウト材を流通させることを特徴とする。 According to a third aspect of the present invention, there is provided a hole that penetrates the structure of an existing structure and reaches the anchoring ground of the anchor, and an anchor is placed in the hole to fix the tip of the anchor to the anchoring ground. An anchor head fixing method in which an upper end of the anchor is fixed to the structure body via a bearing plate, wherein a pipe member is provided at an opening of the hole, and the pipe member is inserted into the hole. And having a cylindrical main body formed in a length reaching from the opening end of the hole to a predetermined depth, and provided with a plurality of holes penetrating between the inner and outer peripheral surfaces in the main body, The grout material is configured to be able to flow between the inner and outer peripheral surfaces of the main body through the holes.
According to a fourth aspect of the present invention, there is provided a step of providing a hole that penetrates the structure of an existing structure to reach the anchoring ground of the anchor, and a flange-like flange portion at the upper end is integrated or separated in the hole. A step of inserting the provided pipe member and the anchor so that the flange portion is placed on the peripheral edge of the opening of the hole, and a grout material is filled inside and outside the sheath tube of the anchor, and the sheath tube An anchor comprising: a grout material injecting step for extending the outer grout material to the opening end portion of the hole; and a step of fixing the head portion of the anchor to the structure via the bearing plate and the flange portion. A method of injecting a grout material used in the head fixing method of the present invention, wherein the tube member is provided with a plurality of holes penetrating between its inner and outer peripheral surfaces, and in the grout material injecting step, on the outside of the sheath tube. Filled with grout material When, characterized in that circulating grout between the inner peripheral surface of the pipe member through the plurality of holes of the tube member.

本発明によるグラウト材の注入方法によれば、アンカーのシース管の内側及び外側にグラウト材を充填する際に、管部材の本体部の孔を介して本体部の内外周面でグラウト材が流通することで本体部の内外周面にグラウト材が充填され、本体部の外周面が孔の内周面にグラウト材を介して定着され、本体部の内周面にアンカーのシース管がグラウト材を介して定着されることになる。   According to the method for injecting a grout material according to the present invention, when the grout material is filled inside and outside the sheath tube of the anchor, the grout material is circulated on the inner and outer peripheral surfaces of the main body through the holes of the main body of the tube member. The grout material is filled in the inner and outer peripheral surfaces of the main body, the outer peripheral surface of the main body is fixed to the inner peripheral surface of the hole via the grout material, and the sheath tube of the anchor is grouted on the inner peripheral surface of the main body. It will be fixed via.

以上、説明したように、本発明によれば、既存の構造物に対して耐震補強をする際に、既存の構造物を支持している構造体の強度以上の永久アンカーを使用することができるので、既存の構造物に所要の耐震性能を付与することができる。
また、既存の構造物の構造体に設けた孔の開口部には管部材が設けられているので、管部材によって孔の開口部の圧壊を防止できることになり、永久アンカーによる緊張力を構造体を介して構造物に付与することができる。
さらに、管部材の本体部の内外周面にグラウト材を充填することができるので、管部材の本体部の外周面をグラウト材を介して孔の内周面に定着させ、本体部の内周面にアンカーをグラウト材を介して定着させることができる。 As described above, according to the present invention, when an earthquake-proof reinforcement is performed on an existing structure, a permanent anchor having a strength higher than that of the structure supporting the existing structure can be used. Therefore, the required seismic performance can be imparted to existing structures.
Moreover, since the pipe member is provided in the opening part of the hole provided in the structure of the existing structure, the pipe member can prevent the opening part of the hole from being collapsed, and the tension force due to the permanent anchor is applied to the structure body. It can be given to the structure via.
Furthermore, since the grout material can be filled into the inner and outer peripheral surfaces of the main body portion of the pipe member, the outer peripheral surface of the main body portion of the pipe member is fixed to the inner peripheral surface of the hole through the grout material, and the inner periphery of the main body portion is fixed. An anchor can be fixed to the surface via a grout material.

以下、図面を参照しながら本発明の実施の形態について説明する。
図１〜図６には、本発明によるアンカーの頭部定着構造の第１の実施の形態が示されていて、図１は孔の削孔工程を示す説明図、図２はアンカー挿入工程を示す説明図、図３はグラウト材注入工程を示す説明図、図４はアンカー頭部処理工程を示す説明図、図５は緊張力付与工程を示す説明図、図６はアンカー頭部保護工程を示す説明図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 show a first embodiment of an anchor head fixing structure according to the present invention. FIG. 1 is an explanatory view showing a hole drilling step, and FIG. 2 is an anchor insertion step. FIG. 3 is an explanatory view showing a grout material injecting step, FIG. 4 is an explanatory view showing an anchor head processing step, FIG. 5 is an explanatory view showing a tension applying step, and FIG. 6 is an anchor head protecting step. It is explanatory drawing shown.

すなわち、本実施の形態に示すアンカーの頭部定着構造は、地盤２５の上部に構造体（例えば、既設の基礎２０）を介して支持される既存の建物等の構造物（図示せず）を耐震補強するのに有効なものであって、耐震改修促進法に基づいて既存の構造物の耐震診断（コンクリート強度等の耐震性能の調査）を行い、その耐震診断結果に基づいて耐震補強の設計（永久アンカーの設計）を行い、指定の検査機関に対して耐震改修計画の申請を行い、耐震改修計画の確認を受けた後に、永久アンカー１の施工を行い、永久アンカー１によって構造物に耐震補強を施すものである。   That is, in the anchor head fixing structure shown in the present embodiment, a structure (not shown) such as an existing building is supported on the upper portion of the ground 25 via a structure (for example, the existing foundation 20). It is effective for seismic reinforcement, and conducts seismic diagnosis (examination of seismic performance such as concrete strength) of existing structures based on the seismic retrofit promotion method, and design of seismic reinforcement based on the seismic diagnostic results (Permanent Anchor Design), apply to the designated inspection organization for the earthquake-resistant repair plan, and after receiving confirmation of the earthquake-resistant repair plan, install the permanent anchor 1 and make the structure anchored by the permanent anchor 1 Reinforcing.

永久アンカー１としては、各種の永久アンカーを用いることができる。本実施の形態においては、図６に示すように、永久アンカー１として、内外周面に凹凸を有する合成樹脂製のシース管２と、シース管２内に挿入される複数本の鋼線３（例えば、ＰＣ鋼より線）と、鋼線３の上端部に装着される定着具４と、シース管２の先端部及び上端部の内周側に装着される止水材（図示せず）と、シース管２内に挿入されるインナーグラウト注入管（図示せず）及びアウターグラウト注入管（図示せず）とを備えたものを使用している。   Various permanent anchors can be used as the permanent anchor 1. In the present embodiment, as shown in FIG. 6, as the permanent anchor 1, a synthetic resin sheath tube 2 having irregularities on the inner and outer peripheral surfaces, and a plurality of steel wires 3 inserted into the sheath tube 2 ( For example, a PC steel strand), a fixing device 4 attached to the upper end portion of the steel wire 3, a water stop material (not shown) attached to the inner peripheral side of the distal end portion and the upper end portion of the sheath tube 2. In addition, an inner grout injection tube (not shown) and an outer grout injection tube (not shown) inserted into the sheath tube 2 are used.

上記のような構成の永久アンカー１を打設するには、後述する削孔工程、アンカー挿入工程、グラウト材注入工程、アンカー頭部処理工程、緊張力付与工程、アンカー頭部保護工程により行う。
以下、各工程について詳細に説明する。 In order to drive the permanent anchor 1 having the above-described configuration, a drilling process, an anchor insertion process, a grout material injection process, an anchor head treatment process, a tension applying process, and an anchor head protection process described later are performed.
Hereinafter, each step will be described in detail.

（１）削孔工程
まず、図１に示すように、構造物を支持している構造体（例えば、基礎２０）を貫通して地盤２５のアンカーの定着地盤（図示せず）に達する所定の直径、深さの孔２１を複数箇所に設ける。
この場合、コンクリート製の基礎２０に対してはコアボーリングにより孔２１を開け、地盤２５に対してはアンカー掘削機により孔２１を削孔する。 (1) Drilling step First, as shown in FIG. 1, a predetermined ground reaching the anchor ground (not shown) of the anchor of the ground 25 through the structure (for example, the foundation 20) supporting the structure. Holes 21 having a diameter and a depth are provided at a plurality of locations.
In this case, a hole 21 is formed in the concrete foundation 20 by core boring, and the hole 21 is drilled in the ground 25 by an anchor excavator.

（２）アンカー挿入工程
次に、図２に示すように、各孔２１内に予め組み立てておいた永久アンカー１を挿入し、永久アンカー１のシース管２及び各鋼線３の先端を定着地盤内に到達させ、シース管２及び各鋼線３の上端を構造物の基礎２０よりも上方に突出させる。 (2) Anchor insertion process Next, as shown in FIG. 2, the permanent anchor 1 assembled in advance in each hole 21 is inserted, and the sheath tube 2 of the permanent anchor 1 and the tips of the steel wires 3 are fixed to the ground. The upper ends of the sheath tube 2 and each steel wire 3 are projected upward from the foundation 20 of the structure.

（３）グラウト材注入工程
次に、図３に示すように、注入装置（図示せず）を作動させて、注入装置からインナーグラウト注入管を介してシース管２内にグラウト材を注入し、シース管２の内周側の下端部の止水材と上端部の止水材との間にグラウト材１５を充填する。 (3) Grout material injection step Next, as shown in FIG. 3, the injection device (not shown) is operated to inject the grout material from the injection device into the sheath tube 2 through the inner grout injection tube. The grout material 15 is filled between the water stop material at the lower end portion and the water stop material at the upper end portion on the inner peripheral side of the sheath tube 2.

次に、注入装置からアウターグラウト注入管を介して孔２１の底部にグラウト材１５を注入し、このグラウト材１５を孔２１の底部からシース管２の外周面側に回り込ませ、シース管２の外周面と孔２１の内周面との間に充填する。   Next, the grout material 15 is injected into the bottom of the hole 21 from the injection device through the outer grout injection tube, and the grout material 15 is caused to wrap around from the bottom of the hole 21 to the outer peripheral surface side of the sheath tube 2. Filling is performed between the outer peripheral surface and the inner peripheral surface of the hole 21.

このようにして、シース管２の内周側及び外周側にグラウト材１５を充填することにより、シース管２の外周面がグラウト材１５を介して孔２１の内周面に定着され、複数本の鋼線３がグラウト材１５を介してアンカーの定着地盤に定着されることになる。   In this way, by filling the outer peripheral side and the outer peripheral side of the sheath tube 2 with the grout material 15, the outer peripheral surface of the sheath tube 2 is fixed to the inner peripheral surface of the hole 21 via the grout material 15, and a plurality of the The steel wire 3 is fixed to the anchor fixing ground via the grout material 15.

（４）アンカー頭部処理工程
次に、上記のようにグラウト材注入工程によりシース管２の内外周面にグラウト材１５を充填した後、図４に示すように、シース管２の上端部外周面に止水材１９を設け、この止水材１９の上部に防錆油１６を充填し、複数の鋼線３の基礎２０から上方に突出している部分に定着具４を取り付ける。 (4) Anchor head processing step Next, after the grout material 15 is filled into the inner and outer peripheral surfaces of the sheath tube 2 by the grout material injection step as described above, the outer periphery of the upper end portion of the sheath tube 2 as shown in FIG. A water-stopping material 19 is provided on the surface, the anti-rust oil 16 is filled into the upper portion of the water-stopping material 19, and the fixing device 4 is attached to a portion protruding upward from the foundation 20 of the plurality of steel wires 3.

（５）緊張力付与工程
次に、図５に示すように、ジャッキの操作によって鋼線３に緊張力を付与し、この状態で鋼線３の上端を定着具４を介して基礎２０に頭部定着させる。
より詳細には、定着具４は、各鋼線３を挿通させる孔５ａが複数箇所に設けられる板状の支圧板５と、支圧板５の各孔５ａ内に係合されるクサビ状の係止爪７と、支圧板５の上部に装着されるキャップ８とを備えており、支圧板５が基礎２０の上面に載置される。そして、ジャッキにより各鋼線３に緊張力を付与し、この状態で各鋼線３の上端を係止爪７により支圧板５の各孔５ａに係止させることで、各鋼線３の上端が支圧板５を介して基礎２０に頭部定着される。 (5) Tensile force application step Next, as shown in FIG. 5, a tension force is applied to the steel wire 3 by operating a jack, and in this state, the upper end of the steel wire 3 is headed to the foundation 20 via the fixing tool 4. Partially fix.
More specifically, the fixing device 4 includes a plate-shaped support plate 5 provided with a plurality of holes 5a through which the steel wires 3 are inserted, and a wedge-shaped engagement engaged with each hole 5a of the support plate 5. A pawl 7 and a cap 8 mounted on the upper part of the bearing plate 5 are provided, and the bearing plate 5 is placed on the upper surface of the foundation 20. And the tension | tensile_strength is provided to each steel wire 3 with a jack, and the upper end of each steel wire 3 is made to latch each hole 5a of the bearing plate 5 with the latching claw 7 in this state by this state. Is fixed to the base 20 via the bearing plate 5.

また、支圧板５はその基礎２０との接触面積が、構造物の基礎２０の強度と永久アンカー１に付与する緊張力との関係で、基礎２０にその強度以上の応力が作用しない大きさに形成されている。このため、既存の基礎２０の強度以上の荷重を永久アンカー１に加えることができ、これにより、基礎２０の強度の制約を受けることなく、設計により求めた永久アンカー１を使用することができるので、既存の構造物に所要の耐震性能を付与することが可能となる。   Further, the contact area of the bearing plate 5 with the foundation 20 is such that the stress exceeding the strength does not act on the foundation 20 due to the relationship between the strength of the foundation 20 of the structure and the tension applied to the permanent anchor 1. Is formed. For this reason, since the load beyond the intensity | strength of the existing foundation 20 can be applied to the permanent anchor 1, the permanent anchor 1 calculated | required by design can be used, without receiving restrictions of the intensity | strength of the foundation 20. The required seismic performance can be imparted to the existing structure.

（６）アンカー頭部保護工程
次に、図６に示すように、支圧板５の上部にキャップ８を取り付け、このキャップ８により複数本の鋼線３の上端部を被包し、キャップ８内に防錆油１６を充填する。そして、必要に応じて、定着具４全体が埋設されるように基礎２０の上部に保護コンクリート１８を打設する。 (6) Anchor head protection step Next, as shown in FIG. 6, a cap 8 is attached to the upper part of the bearing plate 5, and the upper ends of the plurality of steel wires 3 are encapsulated by the cap 8. Is filled with rust preventive oil 16. Then, if necessary, protective concrete 18 is placed on the upper portion of the foundation 20 so that the entire fixing tool 4 is embedded.

このようにして、構造物の基礎２０が永久アンカー１を介して定着地盤と一体化され、地震時に構造物に作用する引抜き力に抵抗する引抜き抵抗力を永久アンカー１に持たせることができ、構造物に所要の耐振性能を付与することができる。   In this way, the foundation 20 of the structure is integrated with the fixed ground via the permanent anchor 1, and the permanent anchor 1 can have a pulling resistance force that resists the pulling force acting on the structure during an earthquake. The required vibration resistance can be imparted to the structure.

上記のように構成した本実施の形態によるアンカーの頭部定着構造にあっては、既存の構造物に対して耐震補強を施す際に、支圧板５が基礎２０にその強度以上の応力が作用しないように構成されているので、永久アンカー１の緊張力によって構造物の基礎２０が圧壊されるようなことはなく、構造物の耐震補強に必要な永久アンカー１を打設して、構造物に所要の耐震性能を付与することができる。   In the anchor head fixing structure according to the present embodiment configured as described above, when the seismic reinforcement is applied to the existing structure, the support plate 5 is subjected to a stress greater than its strength on the foundation 20. The foundation 20 of the structure is not crushed by the tension of the permanent anchor 1, and the permanent anchor 1 necessary for the seismic reinforcement of the structure is placed to construct the structure. Can be given the required seismic performance.

図７には、本発明によるアンカーの頭部定着構造の第２の実施の形態が示されていて、このアンカーの頭部定着構造は、支圧板５の背面側に補強板６を設けたものであって、その他の構成は前記第１の実施の形態に示すものと同様である。   FIG. 7 shows a second embodiment of the anchor head fixing structure according to the present invention. This anchor head fixing structure is provided with a reinforcing plate 6 on the back side of the bearing plate 5. The other configurations are the same as those shown in the first embodiment.

そして、本実施の形態に示すアンカーの頭部定着構造にあっても、前記第１の実施の形態に示すものと同様の作用効果を奏する他に、支圧板５の背面側に補強板６を設けているので、支圧板５の曲げ耐力を高めることができることになる。   Even in the anchor head fixing structure shown in the present embodiment, the reinforcing plate 6 is provided on the back side of the bearing plate 5 in addition to the same effects as those shown in the first embodiment. Since it is provided, the bending strength of the bearing plate 5 can be increased.

すなわち、支圧板５の中央部分には、永久アンカー１の緊張力が作用し、周縁部分は基礎２０に当接しているため、支圧板５には永久アンカー１の緊張力に応じた大きな曲げモーメントが作用することになるが、補強板６を設けることで、この曲げモーメントに対する応力を高めることができる。   That is, since the tension force of the permanent anchor 1 acts on the center portion of the bearing plate 5 and the peripheral portion is in contact with the foundation 20, a large bending moment corresponding to the tension force of the permanent anchor 1 is applied to the bearing plate 5. However, by providing the reinforcing plate 6, the stress against this bending moment can be increased.

図８には、本発明によるアンカーの頭部定着構造の第３の実施の形態が示されていて、このアンカーの頭部定着構造は、基礎２０の孔２１の開口部に鋼製の管部材１０を設けたものであって、その他の構成は前記第１の実施の形態に示すものと同様である。   FIG. 8 shows a third embodiment of an anchor head fixing structure according to the present invention. This anchor head fixing structure is made of a steel pipe member at the opening of a hole 21 of a foundation 20. The other configurations are the same as those shown in the first embodiment.

この場合、管部材１０は、筒状の本体部１１と、本体部１１の上端に一体に設けられる鍔状のフランジ部１２とから構成されており、本体部１１が孔２１内に挿入され、フランジ部１２が孔２１の開口周縁部に載置されている。また、本体部１１の外周面と孔２１の内周面との間、及びフランジ部１２の下面と基礎２０の上面との間にはエポキシ樹脂等の合成樹脂系の接着剤１７が充填され、この接着剤１７を介して管部材１０が孔２１の開口部に一体に設けられている。
なお、フランジ部の外形形状は、円形、矩形、多角形などであってもよく、特に限定されるものではない。
また、管部材１０及び永久アンカー１の孔２１内への挿入順序は、管部材１０の本体部１１を先に孔２１内に挿入し、その後に本体部１１の内側に永久アンカー１を挿入してもよいし、孔内２１に永久アンカー１を先に挿入し、その後に管部材１０の本体部１１を孔２１内に挿入してもよい。 In this case, the tube member 10 includes a cylindrical main body portion 11 and a flange-shaped flange portion 12 provided integrally with the upper end of the main body portion 11. The main body portion 11 is inserted into the hole 21. The flange portion 12 is placed on the opening peripheral edge portion of the hole 21. In addition, a synthetic resin adhesive 17 such as an epoxy resin is filled between the outer peripheral surface of the main body 11 and the inner peripheral surface of the hole 21 and between the lower surface of the flange portion 12 and the upper surface of the base 20. The tube member 10 is provided integrally with the opening of the hole 21 via the adhesive 17.
Note that the outer shape of the flange portion may be a circle, a rectangle, a polygon, or the like, and is not particularly limited.
In addition, the tube member 10 and the permanent anchor 1 are inserted into the hole 21 in such a manner that the main body portion 11 of the tube member 10 is inserted into the hole 21 first, and then the permanent anchor 1 is inserted inside the main body portion 11. Alternatively, the permanent anchor 1 may be inserted into the hole 21 first, and then the main body 11 of the pipe member 10 may be inserted into the hole 21.

そして、本実施の形態によるアンカーの頭部定着構造にあっても、前記第１の実施の形態に示すものと同様の作用効果を奏する他に、孔２１の開口部に管部材１０を設けているので、孔２１の開口部の強度を高めることができ、鋼線３に緊張力を付与した際に、孔２１の開口部に圧壊が生じるのを防止できる。   Even in the anchor head fixing structure according to the present embodiment, the tube member 10 is provided at the opening of the hole 21 in addition to the same effects as those shown in the first embodiment. As a result, the strength of the opening of the hole 21 can be increased, and when the tension force is applied to the steel wire 3, the opening of the hole 21 can be prevented from being crushed.

すなわち、フランジ部１２の中央部分が永久アンカー１の緊張力によって下方に撓もうとし、これにより、孔２１の開口部に局部的に大きな荷重が作用するが、本実施の形態では、管部材１０によって開口部が補強されることで、上記荷重による開口部の圧壊を防止できるのである。   That is, the central portion of the flange portion 12 tends to bend downward due to the tension of the permanent anchor 1, thereby causing a large load to act locally on the opening portion of the hole 21. Since the opening is reinforced by the above, the collapse of the opening due to the load can be prevented.

図９〜図１３には、本発明によるアンカーの頭部定着構造の第４の実施の形態が示されていて、このアンカーの頭部定着構造は、管部材１０の本体部１１を、構造物の基礎２０の略全厚に相当する長さに形成するとともに、本体部１１の複数箇所に内外周面間を貫通する孔１１ａ（図１３参照）を設けたものであって、その他の構成は前記第１及び第３の実施の形態に示すものと同様である。   FIGS. 9 to 13 show a fourth embodiment of the anchor head fixing structure according to the present invention. This anchor head fixing structure includes the main body 11 of the pipe member 10 and the structure. The base 20 is formed to have a length corresponding to substantially the entire thickness, and holes 11a (see FIG. 13) penetrating between the inner and outer peripheral surfaces are provided in a plurality of locations of the main body 11, and other configurations are as follows. This is the same as that shown in the first and third embodiments.

すなわち、本実施の形態においては、図９に示すように、「アンカー挿入工程」において、基礎２０の孔２１内に管部材１０の本体部１１を挿入し、フランジ部１２を孔２１の開口周縁部に載置させ、この状態で管部材１０の本体部１１の内側に永久アンカー１を挿入する。
この場合、孔２１内に永久アンカー１を先に挿入し、その後に管部材１０の本体部１１を孔１２内に挿入するようにしてもよい。 That is, in the present embodiment, as shown in FIG. 9, in the “anchor insertion process”, the main body portion 11 of the pipe member 10 is inserted into the hole 21 of the base 20, and the flange portion 12 is the peripheral edge of the opening of the hole 21. The permanent anchor 1 is inserted inside the main body 11 of the tube member 10 in this state.
In this case, the permanent anchor 1 may be inserted into the hole 21 first, and then the main body 11 of the tube member 10 may be inserted into the hole 12.

そして、図９に示すように、「グラウト材注入工程」において、シース管２の内側及び外側にグラウト材１５を注入し、シース管２の外側のグラウト材１５を孔２１の底部から開口端部まで行き渡らせ、シース管２の内側及び外側(孔２１の底部から孔２１の開口端部まで)にグラウト材１５を充填する。   Then, as shown in FIG. 9, in the “grouting material injection step”, the grout material 15 is injected into the inside and outside of the sheath tube 2, and the grout material 15 outside the sheath tube 2 is opened from the bottom of the hole 21 to the open end portion. The grout material 15 is filled inside and outside the sheath tube 2 (from the bottom of the hole 21 to the opening end of the hole 21).

この場合、シース管２の外周面と孔２１の内周面との間には管部材１０の本体部１１が挿入されているので、グラウト材１５はシース管２の外周面と本体部１１の内周面との間、及び本体部１１の外周面と孔２１の内周面との間に回り込み、この際に本体部１１の各孔１１ａを介して本体部１１の内外周面間で相互に流通し、本体部１１の内周面側及び外周面側にグラウト材１５が密に充填されることになる。また、本体部１１の内周面側のグラウト材１５と本体部１１の外周面側のグラウト材１５とが、本体部１１の孔１１ａ内に位置しているグラウト材１５を介して互いに連結されることになる。   In this case, since the main body portion 11 of the tube member 10 is inserted between the outer peripheral surface of the sheath tube 2 and the inner peripheral surface of the hole 21, the grout material 15 is formed between the outer peripheral surface of the sheath tube 2 and the main body portion 11. It wraps around between the inner peripheral surface and between the outer peripheral surface of the main body 11 and the inner peripheral surface of the hole 21, and at this time, between the inner and outer peripheral surfaces of the main body 11 through the holes 11 a of the main body 11. The grout material 15 is densely filled on the inner peripheral surface side and the outer peripheral surface side of the main body 11. Further, the grout material 15 on the inner peripheral surface side of the main body portion 11 and the grout material 15 on the outer peripheral surface side of the main body portion 11 are connected to each other via the grout material 15 located in the hole 11 a of the main body portion 11. Will be.

そして、シース管２の外側にグラウト材１５を充填することで、管部材１０の本体部１１の内外周面にグラウト材１５を充填した後に、図１０に示すように、「アンカー頭部処理工程」において、シース管２の上端部外周面と管部材１０の本体部１１の内周面との間に止水材１９を設け、この止水材１９の上部に防錆油１６を充填するとともに、基礎２０の上部から管部材１０のフランジ部１２の下面と基礎２０の上面との間にグラウト材１５を注入し、このグラウト材１５を管部材１０の本体部１１の外周面側に回り込ませ、孔２１の底部から充填したグラウト材１５と一体化する。
なお、シース管２の外側にグラウト材１５を充填する際に、孔２１の底部からグラウト材１５を上昇させて管部材１０のフランジ部１２の下面まで行き渡らせることにより、基礎２０の上部から管部材１０のフランジ部１２の下面と基礎２０との間にグラウト材１５を注入する必要はなくなる。 And after filling the grout material 15 in the outer peripheral surface of the main body part 11 of the pipe member 10 by filling the grout material 15 outside the sheath tube 2, as shown in FIG. ”, A water-stopping material 19 is provided between the outer peripheral surface of the upper end portion of the sheath tube 2 and the inner peripheral surface of the main body portion 11 of the tube member 10, and the anti-rust oil 16 is filled on the water-stopping material 19. The grout material 15 is injected from the upper part of the base 20 between the lower surface of the flange portion 12 of the pipe member 10 and the upper surface of the base 20, and the grout material 15 wraps around the outer peripheral surface side of the main body portion 11 of the pipe member 10. The grout material 15 filled from the bottom of the hole 21 is integrated.
When the grout material 15 is filled outside the sheath tube 2, the grout material 15 is raised from the bottom of the hole 21 to reach the lower surface of the flange portion 12 of the tube member 10, so that It is not necessary to inject the grout material 15 between the lower surface of the flange portion 12 of the member 10 and the foundation 20.

そして、複数本の鋼線３の先端を定着地盤に定着させ、複数本の鋼線３の基礎２０の上部から上方に突出している部分に定着具４を装着した後に、図１１に示すように、「緊張力付与工程」において、ジャッキの操作によって複数本の鋼線３に緊張力を付与し、この状態で複数本の鋼線３の上端を定着具４を介して基礎２０に頭部定着させる。   Then, after fixing the tips of the plurality of steel wires 3 to the fixing ground and attaching the fixing tool 4 to the portion protruding upward from the upper part of the foundation 20 of the plurality of steel wires 3, as shown in FIG. In the “tension force applying step”, tension is applied to the plurality of steel wires 3 by operating the jack, and the upper ends of the plurality of steel wires 3 are fixed to the base 20 via the fixing device 4 in this state. Let

この場合、定着具４の支圧板５の下面側には管部材１０のフランジ部１２が介在しているので、各鋼線３の上端は支圧板５及び管部材１０のフランジ部１２を介して基礎２０に頭部定着されることになる。また、この場合にも、支圧板５は、その基礎２０との接触面積が、構造物の基礎２０の強度と永久アンカー１に付与する緊張力との関係で、基礎２０にその強度以上の応力が作用しない大きさに形成されており、既存の基礎２０の強度以上の荷重を永久アンカー１により加えることができるので、設計により求めた永久アンカー１を使用して、既存の構造物に所要の耐震性能を付与することが可能となる。   In this case, since the flange portion 12 of the pipe member 10 is interposed on the lower surface side of the bearing plate 5 of the fixing tool 4, the upper end of each steel wire 3 is interposed via the bearing plate 5 and the flange portion 12 of the tube member 10. The head is fixed to the foundation 20. Also in this case, the pressure bearing plate 5 has a contact area with the foundation 20 that is a relationship between the strength of the foundation 20 of the structure and the tension applied to the permanent anchor 1, and the foundation 20 has a stress greater than that strength. Since the permanent anchor 1 can apply a load higher than the strength of the existing foundation 20, the permanent anchor 1 obtained by design is used for the existing structure. It is possible to provide seismic performance.

そして、図１２に示すように、「アンカー頭部保護工程」において、支圧板５の上部にキャップ８を取り付け、このキャッ８プにより複数本の鋼線３の上端部を被包し、この状態でキャップ８内に防錆油１６を充填し、必要に応じて定着具４全体が埋設されるように基礎２０の上部に保護コンクリート１８を打設する。   Then, as shown in FIG. 12, in the “anchor head protecting step”, a cap 8 is attached to the upper portion of the bearing plate 5 and the upper ends of the plurality of steel wires 3 are encapsulated by this cap 8. Then, the rust preventive oil 16 is filled in the cap 8 and, if necessary, the protective concrete 18 is placed on the upper portion of the foundation 20 so that the entire fixing device 4 is embedded.

上記のように構成した本実施の形態によるアンカーの頭部定着構造にあっても、前記第１の実施の形態に示すものと同様の作用効果を奏する他に、管部材１０の本体部１１を構造物の基礎２０の孔２１内に挿入し、フランジ部１２を孔２１の開口周縁部に載置させているので、管部材１０によって孔２１の開口部を補強することができ、鋼線３に付与する緊張力によって孔２１が圧壊されるのを確実に防止することができる。   Even in the anchor head fixing structure according to the present embodiment configured as described above, the main body portion 11 of the tube member 10 is provided in addition to the same effects as those shown in the first embodiment. Since the flange portion 12 is placed on the peripheral edge of the opening of the hole 21 by being inserted into the hole 21 of the foundation 20 of the structure, the opening of the hole 21 can be reinforced by the pipe member 10, and the steel wire 3 It is possible to reliably prevent the hole 21 from being crushed by the tension force applied to the.

また、管部材１０の本体部１１には、本体部１１の内外周面間を貫通する孔１１ａが複数箇所に設けられているので、シース管２の外周面側にグラウト材１５を充填する際に、本体部１１の孔１１ａを介して本体部１１の内外周面間でグラウト材１５を相互に流通させることができ、本体部１１の内外周面に密にグラウト材１５を充填できるとともに、本体部１１の孔１１ａのグラウト材１５を介して本体部１１の内外周面のグラウト材１５が一体化されることになる。   Further, since the main body 11 of the tube member 10 has a plurality of holes 11a penetrating between the inner and outer peripheral surfaces of the main body 11, when the grout material 15 is filled on the outer peripheral surface of the sheath tube 2. In addition, the grout material 15 can be circulated between the inner and outer peripheral surfaces of the main body part 11 through the holes 11a of the main body part 11, and the grout material 15 can be filled densely on the inner and outer peripheral surfaces of the main body part 11, The grout materials 15 on the inner and outer peripheral surfaces of the main body 11 are integrated via the grout material 15 in the hole 11a of the main body 11.

なお、前記各実施の形態においては、構造物を支持する構造体として基礎２０を例にとって説明したが、基礎２０に限らず、構造物を支持する地中梁や耐圧版等を構造体としてもよい。
また、前記第３、第４の実施の形態においては、管部材１０の本体部１１とフランジ部１２とを一体に形成した例について説明したが、本体部１１とフランジ部１２とを別体に形成して、本体部１１を孔２１内に挿入し、フランジ部１２を孔２１の開口周縁部に載置するように構成してもよい。
さらに、管部材１０を本体部１１のみによって構成し、本体部１１を上端が支圧板５の下面に接触するように、孔２１内に挿入するように構成してもよい。 In each of the above-described embodiments, the foundation 20 is described as an example of a structure that supports the structure. However, the structure is not limited to the foundation 20, and an underground beam or a pressure plate that supports the structure may be used as the structure. Good.
Moreover, in the said 3rd, 4th embodiment, although the example which formed the main-body part 11 and the flange part 12 of the pipe member 10 integrally was demonstrated, the main-body part 11 and the flange part 12 were made into a different body. Alternatively, the main body 11 may be inserted into the hole 21 and the flange 12 may be placed on the opening peripheral edge of the hole 21.
Furthermore, the pipe member 10 may be configured by only the main body portion 11, and the main body portion 11 may be configured to be inserted into the hole 21 so that the upper end contacts the lower surface of the bearing plate 5.

本発明によるアンカーの頭部定着構造の第１の実施の形態を示した説明図であって、孔の削孔工程を示した説明図である。It is explanatory drawing which showed 1st Embodiment of the head fixing structure of the anchor by this invention, Comprising: It is explanatory drawing which showed the drilling process of the hole. アンカー挿入工程を示した説明図である。It is explanatory drawing which showed the anchor insertion process. グラウト材の注入工程を示した説明図である。It is explanatory drawing which showed the injection | pouring process of the grout material. アンカー頭部処理工程を示した説明図である。It is explanatory drawing which showed the anchor head process process. 緊張力付与工程を示した説明図である。It is explanatory drawing which showed the tension | tensile_strength provision process. アンカーの頭部保護工程を示した説明図である。It is explanatory drawing which showed the head protection process of the anchor. 本発明によるアンカーの頭部定着構造の第２の実施の形態を示した説明図である。It is explanatory drawing which showed 2nd Embodiment of the head fixing structure of the anchor by this invention. 本発明によるアンカーの頭部定着構造の第３の実施の形態を示した説明図である。It is explanatory drawing which showed 3rd Embodiment of the head fixing structure of the anchor by this invention. 本発明によるアンカーの頭部定着構造の第４の実施の形態を示した説明図であって、アンカー挿入工程及びグラウト材注入工程を示した説明図である。It is explanatory drawing which showed 4th Embodiment of the head fixing structure of the anchor by this invention, Comprising: It is explanatory drawing which showed the anchor insertion process and the grout material injection | pouring process. アンカー頭部処理工程を示した説明図である。It is explanatory drawing which showed the anchor head process process. 緊張力付与工程を示した説明図である。It is explanatory drawing which showed the tension | tensile_strength provision process. アンカー頭部保護工程を示した説明図である。It is explanatory drawing which showed the anchor head protection process. 図１２の部分拡大図である。It is the elements on larger scale of FIG.

符号の説明Explanation of symbols

１ 永久アンカー
２ シース管
３ 鋼線
４ 定着具
５ 支圧板
５ａ 孔
６ 補強板
７ 係止爪
８ キャップ
１０ 管部材
１１ 本体部
１１ａ 孔
１２ フランジ部
１５ グラウト材
１６ 防錆油
１７ 接着剤
１８ 保護コンクリート
１９ 止水材
２０ 構造体（基礎）
２１ 孔
２５ 地盤 DESCRIPTION OF SYMBOLS 1 Permanent anchor 2 Sheath tube 3 Steel wire 4 Fixing tool 5 Supporting plate 5a Hole 6 Reinforcement plate 7 Locking claw 8 Cap 10 Pipe member 11 Main part 11a Hole 12 Flange part 15 Grout material 16 Antirust oil 17 Adhesive 18 Protective concrete 19 Water blocking material 20 Structure (basic)
21 hole 25 ground

Claims (4)

既存の構造物の構造体を貫通してアンカーの定着地盤に達する孔を設け、該孔内にアンカーを打設して該アンカーの先端を前記定着地盤に定着させ、該アンカーの上端を前記構造体に支圧板を介して頭部定着させるアンカーの頭部定着構造であって、
前記孔の開口部に管部材を設け、
前記管部材は、前記孔内に挿入されるとともに、前記孔の開口端部から所定の深さまで達する長さに形成される筒状の本体部を有し、
前記本体部には内外周面間を貫通する孔が複数箇所に設けられ、該孔を介して該本体部の内外周面間をグラウト材が流通可能に構成されていることを特徴とするアンカーの頭部定着構造。 A hole that penetrates the structure of the existing structure to reach the anchoring ground of the anchor is provided, the anchor is placed in the hole to fix the tip of the anchor to the anchoring ground, and the upper end of the anchor is the structure An anchor head fixing structure that fixes the head to the body via a support plate,
A pipe member is provided at the opening of the hole,
The tube member is inserted into the hole, and has a cylindrical main body formed to a length reaching a predetermined depth from the opening end of the hole,
The main body is provided with a plurality of holes penetrating between the inner and outer peripheral surfaces, and the grout material is configured to flow between the inner and outer peripheral surfaces of the main body through the holes. Head fixing structure. 前記本体部の上端には、鍔状のフランジ部が一体又は別体に設けられ、該フランジ部が前記孔の開口周縁部に載置されていることを特徴とする請求項１に記載のアンカーの頭部定着構造。 The upper end of the body portion, a flange-like flange portion is provided integrally or separately, an anchor according to claim 1 wherein said flange portion is equal to or placed on the opening edge of the hole Head fixing structure. 既存の構造物の構造体を貫通してアンカーの定着地盤に達する孔を設け、該孔内にアンカーを打設して該アンカーの先端を前記定着地盤に定着させ、該アンカーの上端を支圧板を介して前記構造体に頭部定着させるアンカーの頭部定着方法であって、
前記孔の開口部に管部材を設け、
前記管部材は、前記孔内に挿入されるとともに、前記孔の開口端部から所定の深さまで達する長さに形成される筒状の本体部を有し、
前記本体部に内外周面間を貫通する孔を複数箇所に設け、該孔を介して該本体部の内外周面間をグラウト材が流通可能に構成したことを特徴とするアンカーの頭部定着方法。 A hole that penetrates the structure of the existing structure to reach the anchoring ground of the anchor is provided, the anchor is placed in the hole to fix the tip of the anchor to the anchoring ground, and the upper end of the anchor is supported on the bearing plate An anchor head fixing method for fixing the head to the structure via
A pipe member is provided at the opening of the hole,
The tube member is inserted into the hole, and has a cylindrical main body formed to a length reaching a predetermined depth from the opening end of the hole,
A head fixing of an anchor characterized in that a hole penetrating between the inner and outer peripheral surfaces of the main body is provided at a plurality of locations, and a grout material can be distributed between the inner and outer peripheral surfaces of the main body through the holes. Method. 既存の構造物の構造体を貫通してアンカーの定着地盤に達する孔を設ける工程と、
該孔内に、上端部に鍔状のフランジ部が一体又は別体に設けられた管部材及びアンカーを、前記フランジ部が前記孔の開口周縁部に載置されるように挿入する工程と、
前記アンカーのシース管の内側及び外側にグラウト材を充填し、該シース管の外側のグラウト材を前記孔の開口端部まで行き渡させるグラウト材注入工程と、
前記アンカーの頭部を前記構造体に支圧板及び前記フランジ部を介して頭部定着させる工程とを備えたアンカーの頭部定着方法に使用されるグラウト材の注入方法であって、
前記管部材にその内外周面間を貫通する孔を複数箇所に設け、
前記グラウト材注入工程において、前記シース管の外側にグラウト材を充填する際に、前記管部材の複数の孔を介して前記管部材の内外周面間でグラウト材を流通させることを特徴とするグラウト材の注入方法。 Providing a hole that penetrates the structure of the existing structure and reaches the anchor ground;
A step of inserting a pipe member and an anchor having a flange-like flange portion integrally or separately at the upper end thereof into the hole so that the flange portion is placed on the peripheral edge of the opening of the hole;
A grout material injection step of filling the grout material inside and outside the sheath tube of the anchor and spreading the grout material outside the sheath tube to the opening end of the hole;
A method of injecting a grout material used in an anchor head fixing method comprising the step of fixing the head of the anchor to the structure via a bearing plate and the flange portion,
The pipe member is provided with holes penetrating between its inner and outer peripheral surfaces at a plurality of locations,
In the grout material injection step, when the grout material is filled outside the sheath tube, the grout material is circulated between the inner and outer peripheral surfaces of the tube member through the plurality of holes of the tube member. Grouting material injection method.
JP2007097676A 2007-04-03 2007-04-03 Anchor head fixing structure, anchor head fixing method, and grout injection method Expired - Fee Related JP5217216B2 (en)

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