A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
GROUND IMPROVEMENT DEVICE AND GROUND IMPROVEMENT METHOD
To reduce the drilling resistance when a rotary shaft penetrates into the ground, to shorten the penetration time of the rotary shaft, and to reduce the load on a drilling head, agitating blade, or rotary shaft during the penetration.SOLUTION: A ground improvement device has a vertically rotary shaft 3 that can penetrate into the ground, a drilling head 6 attached to a lower end of the rotary shaft 3, and a pair of agitating blades 7 symmetrically attached to the rotary shaft 3 above the drilling head 6 about the rotary shaft 3. One stirring blade 7 of the pair of agitating blades 7 is provided with a discharge hole 14 for discharging an improved material G in which a solidifying material is mixed with compressed air toward the front in the rotation direction of one agitating blade 7 and obliquely downward. The drilling head 6 is provided with an injection nozzle 15 that linearly injects a drilling material J containing at least compressed air forward and obliquely downward in the rotation direction of the other agitating blade 7 of the pair of agitating blades 7.SELECTED DRAWING: Figure 3
【課題】回転軸を地盤中に貫入するときの掘削抵抗を小さくし、回転軸の貫入時間を短縮するとともに、貫入時の掘削ヘッドや攪拌翼あるいは回転軸への負荷を低減する。【解決手段】地盤中に貫入可能な上下に向かう回転軸３と、回転軸３の下端に取り付けた掘削ヘッド６と、掘削ヘッド６の上方の回転軸３に回転軸３を中心にして対称に取り付けた一対の攪拌翼７を有する地盤改良装置であって、一対の攪拌翼７の一方の攪拌翼７に、固化材に圧縮エアーを混合した改良材料Ｇを、一方の攪拌翼７の回転方向の前方でかつ斜め下方に向けて霧状に吐出する吐出孔１４を備え、掘削ヘッド６に、少なくとも圧縮エアーを含有する掘削材料Ｊを、一対の攪拌翼７の他方の攪拌翼７の回転方向の前方でかつ斜め下方に向けて線状に噴射する噴射ノズル１５を備える。【選択図】図３
GROUND IMPROVEMENT DEVICE AND GROUND IMPROVEMENT METHOD
To reduce the drilling resistance when a rotary shaft penetrates into the ground, to shorten the penetration time of the rotary shaft, and to reduce the load on a drilling head, agitating blade, or rotary shaft during the penetration.SOLUTION: A ground improvement device has a vertically rotary shaft 3 that can penetrate into the ground, a drilling head 6 attached to a lower end of the rotary shaft 3, and a pair of agitating blades 7 symmetrically attached to the rotary shaft 3 above the drilling head 6 about the rotary shaft 3. One stirring blade 7 of the pair of agitating blades 7 is provided with a discharge hole 14 for discharging an improved material G in which a solidifying material is mixed with compressed air toward the front in the rotation direction of one agitating blade 7 and obliquely downward. The drilling head 6 is provided with an injection nozzle 15 that linearly injects a drilling material J containing at least compressed air forward and obliquely downward in the rotation direction of the other agitating blade 7 of the pair of agitating blades 7.SELECTED DRAWING: Figure 3
【課題】回転軸を地盤中に貫入するときの掘削抵抗を小さくし、回転軸の貫入時間を短縮するとともに、貫入時の掘削ヘッドや攪拌翼あるいは回転軸への負荷を低減する。【解決手段】地盤中に貫入可能な上下に向かう回転軸３と、回転軸３の下端に取り付けた掘削ヘッド６と、掘削ヘッド６の上方の回転軸３に回転軸３を中心にして対称に取り付けた一対の攪拌翼７を有する地盤改良装置であって、一対の攪拌翼７の一方の攪拌翼７に、固化材に圧縮エアーを混合した改良材料Ｇを、一方の攪拌翼７の回転方向の前方でかつ斜め下方に向けて霧状に吐出する吐出孔１４を備え、掘削ヘッド６に、少なくとも圧縮エアーを含有する掘削材料Ｊを、一対の攪拌翼７の他方の攪拌翼７の回転方向の前方でかつ斜め下方に向けて線状に噴射する噴射ノズル１５を備える。【選択図】図３
GROUND IMPROVEMENT DEVICE AND GROUND IMPROVEMENT METHOD
地盤改良装置及び地盤改良方法
TANAKA HATSUICHI (author)
2020-05-07
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
GROUND IMPROVEMENT DEVICE, GROUND IMPROVEMENT SYSTEM, AND GROUND IMPROVEMENT METHOD
| European Patent Office | 2019
GROUND IMPROVEMENT DEVICE, GROUND IMPROVEMENT SYSTEM, AND GROUND IMPROVEMENT METHOD
| European Patent Office | 2020