A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD OF CONSTRUCTING POST-CONSTRUCTING ANCHOR
To provide a method of constructing a post-constructing anchor that hardly causes pull-out of an anchor bar and can construct the post-constructing anchor after lowering of pulling yield strength of the anchor bar caused by crack of a concrete structure is prevented.SOLUTION: A method of constructing a post-constructing anchor according to the present invention comprises a step of boring a bottom expanded bore by boring a bore having a diameter Don the surface of a concrete structure and then forming a bottom expanded part having a maximum diameter Dat the bottom of the bore, a step of filling an inorganic filler on the bottom expanded bore, a step of inserting, into the bottom expanded bore, an anchor bar including a body part having a diameter Dand a bottom expanded head part having a maximum diameter D, and a step of driving the anchor bar and then expanding the maximum diameter of the bottom expanded head part to D, the method satisfying (1) equation [D-D≥4.0 mm], (2) equation [D/D≥1.10], (3) equation [D/D<1.10], and (4) equation [D/D≥1.40].SELECTED DRAWING: Figure 1
【課題】アンカー筋の引き抜けが生じにくく、かつ、コンクリート構造物のひび割れによって生じるアンカー筋の引張耐力の低下が抑制されたあと施工アンカーを施工することが可能なあと施工アンカーの施工方法を提供することを課題とする。【解決手段】本発明に係るあと施工アンカーの施工方法は、コンクリート構造物の表面に直径Ｄ１の孔を穿孔後、該孔の底部に、最大直径Ｄ２の拡底部を形成することにより、拡底孔を穿孔する工程と、前記拡底孔に無機系充填材を充填する工程と、直径Ｄ３の胴部と最大直径Ｄ４の拡底頭部とを備えるアンカー筋を前記拡底孔に挿入する工程と、前記アンカー筋を打ち込んで、前記拡底頭部の最大直径をＤ５に拡張させる工程とを有し、（１）式［Ｄ４−Ｄ３≧４．０ｍｍ］、（２）式［Ｄ５／Ｄ１≧１．１０］、（３）式［Ｄ５／Ｄ２＜１．１０］及び（４）式［Ｄ５／Ｄ３≧１．４０］を満たす。【選択図】図１
METHOD OF CONSTRUCTING POST-CONSTRUCTING ANCHOR
To provide a method of constructing a post-constructing anchor that hardly causes pull-out of an anchor bar and can construct the post-constructing anchor after lowering of pulling yield strength of the anchor bar caused by crack of a concrete structure is prevented.SOLUTION: A method of constructing a post-constructing anchor according to the present invention comprises a step of boring a bottom expanded bore by boring a bore having a diameter Don the surface of a concrete structure and then forming a bottom expanded part having a maximum diameter Dat the bottom of the bore, a step of filling an inorganic filler on the bottom expanded bore, a step of inserting, into the bottom expanded bore, an anchor bar including a body part having a diameter Dand a bottom expanded head part having a maximum diameter D, and a step of driving the anchor bar and then expanding the maximum diameter of the bottom expanded head part to D, the method satisfying (1) equation [D-D≥4.0 mm], (2) equation [D/D≥1.10], (3) equation [D/D<1.10], and (4) equation [D/D≥1.40].SELECTED DRAWING: Figure 1
【課題】アンカー筋の引き抜けが生じにくく、かつ、コンクリート構造物のひび割れによって生じるアンカー筋の引張耐力の低下が抑制されたあと施工アンカーを施工することが可能なあと施工アンカーの施工方法を提供することを課題とする。【解決手段】本発明に係るあと施工アンカーの施工方法は、コンクリート構造物の表面に直径Ｄ１の孔を穿孔後、該孔の底部に、最大直径Ｄ２の拡底部を形成することにより、拡底孔を穿孔する工程と、前記拡底孔に無機系充填材を充填する工程と、直径Ｄ３の胴部と最大直径Ｄ４の拡底頭部とを備えるアンカー筋を前記拡底孔に挿入する工程と、前記アンカー筋を打ち込んで、前記拡底頭部の最大直径をＤ５に拡張させる工程とを有し、（１）式［Ｄ４−Ｄ３≧４．０ｍｍ］、（２）式［Ｄ５／Ｄ１≧１．１０］、（３）式［Ｄ５／Ｄ２＜１．１０］及び（４）式［Ｄ５／Ｄ３≧１．４０］を満たす。【選択図】図１
METHOD OF CONSTRUCTING POST-CONSTRUCTING ANCHOR
あと施工アンカーの施工方法
ANDO SHIGEHIRO (author) / TAMURA TSUTOMU (author) / KANEYOSHI TAKAMASA (author)
2019-09-26
Patent
Electronic Resource
Japanese
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