A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
GROUND ANCHOR CONSTRUCTION METHOD WITH UNIFORM ADHESION STRESS
To provide a ground anchor construction method which can improve durability by preventing the gradual progression of fracture due to the generation of concentrated stress that occurs in an anchoring portion of a conventional ground anchor, and by applying substantially uniform stress to the entire anchoring portion.SOLUTION: A hole 5 with a diameter of 40 to 400 mm is drilled from a ground surface 1 to an immobile layer 4 deep in the ground. A tendon 6 is inserted into the hole 5 after drilling. A tendon fixing portion 7 is formed by injecting cement for the tendon fixing portion 7 around a tip 6a of the tendon 6 in the hole of the immobile layer 4. After forming the tendon fixing portion 7, a temporary pressure receiving plate 18 is installed on the ground surface 1. With the tendon 6 under tension using the temporary pressure receiving plate 18 as a reaction force, ultra-fast hardening cement for a tendon tension fixing portion 8 is injected into the hole 5 from the ground surface 1 to an area around an intermediate portion 6c of the tendon 6 excluding the tip 6a, from the immobile layer 4 to a moving layer 3 in a shallow portion of the ground to form the tendon tension fixing portion 8. After forming the tendon tension fixing portion 8, the temporary pressure receiving plate is removed.SELECTED DRAWING: Figure 1
【課題】従来型のグラウンドアンカーの定着部で発生する集中応力発生による逐次破壊進行が起こらず、定着区間全体に略均等な応力が作用し、耐久性の向上を図れるグラウンドアンカー工法を提供する。【解決手段】地表面１から孔径４０～４００ｍｍの孔５を地盤深部の不動層４まで削孔し、削孔後の孔５内にテンドン６を挿入し、不動層４の孔内でテンドン６の先端部６ａの周囲にテンドン固定部７用のセメントを注入してテンドン固定部７を形成し、テンドン固定部７の形成後、地表面１に仮受圧板１８を設置して、仮受圧板１８を反力としてテンドン６を緊張した状態で、地表面１からテンドン６の先端部６ａを除く中間部６ｃの周囲に不動層４から地盤浅部の移動層３にかけて孔５内にテンドン緊張定着部８用の超速硬セメントを注入してテンドン緊張定着部８を形成し、テンドン緊張定着部８の形成後、仮受圧板を撤去する。【選択図】図１
GROUND ANCHOR CONSTRUCTION METHOD WITH UNIFORM ADHESION STRESS
To provide a ground anchor construction method which can improve durability by preventing the gradual progression of fracture due to the generation of concentrated stress that occurs in an anchoring portion of a conventional ground anchor, and by applying substantially uniform stress to the entire anchoring portion.SOLUTION: A hole 5 with a diameter of 40 to 400 mm is drilled from a ground surface 1 to an immobile layer 4 deep in the ground. A tendon 6 is inserted into the hole 5 after drilling. A tendon fixing portion 7 is formed by injecting cement for the tendon fixing portion 7 around a tip 6a of the tendon 6 in the hole of the immobile layer 4. After forming the tendon fixing portion 7, a temporary pressure receiving plate 18 is installed on the ground surface 1. With the tendon 6 under tension using the temporary pressure receiving plate 18 as a reaction force, ultra-fast hardening cement for a tendon tension fixing portion 8 is injected into the hole 5 from the ground surface 1 to an area around an intermediate portion 6c of the tendon 6 excluding the tip 6a, from the immobile layer 4 to a moving layer 3 in a shallow portion of the ground to form the tendon tension fixing portion 8. After forming the tendon tension fixing portion 8, the temporary pressure receiving plate is removed.SELECTED DRAWING: Figure 1
【課題】従来型のグラウンドアンカーの定着部で発生する集中応力発生による逐次破壊進行が起こらず、定着区間全体に略均等な応力が作用し、耐久性の向上を図れるグラウンドアンカー工法を提供する。【解決手段】地表面１から孔径４０～４００ｍｍの孔５を地盤深部の不動層４まで削孔し、削孔後の孔５内にテンドン６を挿入し、不動層４の孔内でテンドン６の先端部６ａの周囲にテンドン固定部７用のセメントを注入してテンドン固定部７を形成し、テンドン固定部７の形成後、地表面１に仮受圧板１８を設置して、仮受圧板１８を反力としてテンドン６を緊張した状態で、地表面１からテンドン６の先端部６ａを除く中間部６ｃの周囲に不動層４から地盤浅部の移動層３にかけて孔５内にテンドン緊張定着部８用の超速硬セメントを注入してテンドン緊張定着部８を形成し、テンドン緊張定着部８の形成後、仮受圧板を撤去する。【選択図】図１
GROUND ANCHOR CONSTRUCTION METHOD WITH UNIFORM ADHESION STRESS
付着応力が均等なグラウンドアンカー工法
MITA KAZURO (author)
2024-03-07
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
THE ADHESION OF THE GROUT WITH INCREASED GROUND ANCHOR CONSTRUCTION METHOD
| European Patent Office | 2015