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METHOD AND DEVICE FOR CHECKING IMPROVEMENT RADIUS OF IMPROVEMENT BODY
PROBLEM TO BE SOLVED: To provide a method and a device for checking whether or not improvement radius of an improvement body during establishment in a high-pressure injection mixing method has reached a designed improvement radius during establishment of the improvement body.SOLUTION: An arrival pipe 5, which is a cylindrical steel pipe, is inserted in a ground 6 in advance at a position B at a distance L corresponding to a designed improvement radius from a position A where an injection pipe 4 is inserted in the ground 6 before the injection pipe 4 is inserted into the ground 6. Subsequently, the injection pipe 4 is inserted into the ground 6 by lowering the pipe downward while rotating the pipe. When the injection pipe 4 reached a predetermined depth, lowering of the injection pipe 4 is stopped. A solidification material slurry is injected from a nozzle 9 while the injection pipe 4 is pulled up at a predetermined speed while the injection pipe 4 is rotated at predetermined revolution speed. An acceleration sensor 10 detects acceleration generated on the arrival pipe 5 and transfers the detection result to a recording meter 11 while the injection pipe 4 is pulled up.SELECTED DRAWING: Figure 1
【課題】高圧噴射攪拌工法において造成中の改良体の改良半径が設計改良半径に達しているか否かを改良体の造成中に確認する方法及び装置を提供する。【解決手段】注入管４を地盤６に挿入する前に、注入管４が地盤６に挿入される位置Ａから、設計改良半径に相当する距離Ｌだけ離れた位置Ｂに、円筒形状を有する鉄製の管である到達管５を予め地盤６に挿入しておく。次に、注入管４を回転させながら下降させて地盤６に挿入する。注入管４を所定の深さまで挿入したら、注入管４の下降を止める。注入管４を所定回転数で回転させながら所定の速度で注入管４を引き上げると共にノズル９から固化材スラリーが噴射される。注入管４を引き上げる間、加速度センサー１０は、到達管５に生じる加速度を検知し、検知結果を記録計１１に伝送する。【選択図】図１
METHOD AND DEVICE FOR CHECKING IMPROVEMENT RADIUS OF IMPROVEMENT BODY
PROBLEM TO BE SOLVED: To provide a method and a device for checking whether or not improvement radius of an improvement body during establishment in a high-pressure injection mixing method has reached a designed improvement radius during establishment of the improvement body.SOLUTION: An arrival pipe 5, which is a cylindrical steel pipe, is inserted in a ground 6 in advance at a position B at a distance L corresponding to a designed improvement radius from a position A where an injection pipe 4 is inserted in the ground 6 before the injection pipe 4 is inserted into the ground 6. Subsequently, the injection pipe 4 is inserted into the ground 6 by lowering the pipe downward while rotating the pipe. When the injection pipe 4 reached a predetermined depth, lowering of the injection pipe 4 is stopped. A solidification material slurry is injected from a nozzle 9 while the injection pipe 4 is pulled up at a predetermined speed while the injection pipe 4 is rotated at predetermined revolution speed. An acceleration sensor 10 detects acceleration generated on the arrival pipe 5 and transfers the detection result to a recording meter 11 while the injection pipe 4 is pulled up.SELECTED DRAWING: Figure 1
【課題】高圧噴射攪拌工法において造成中の改良体の改良半径が設計改良半径に達しているか否かを改良体の造成中に確認する方法及び装置を提供する。【解決手段】注入管４を地盤６に挿入する前に、注入管４が地盤６に挿入される位置Ａから、設計改良半径に相当する距離Ｌだけ離れた位置Ｂに、円筒形状を有する鉄製の管である到達管５を予め地盤６に挿入しておく。次に、注入管４を回転させながら下降させて地盤６に挿入する。注入管４を所定の深さまで挿入したら、注入管４の下降を止める。注入管４を所定回転数で回転させながら所定の速度で注入管４を引き上げると共にノズル９から固化材スラリーが噴射される。注入管４を引き上げる間、加速度センサー１０は、到達管５に生じる加速度を検知し、検知結果を記録計１１に伝送する。【選択図】図１
METHOD AND DEVICE FOR CHECKING IMPROVEMENT RADIUS OF IMPROVEMENT BODY
改良体の改良半径を確認する方法及び装置
ISHII TOSHIKI (author)
2017-01-05
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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