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HOLLOW PIPE FOR CONSTRUCTING DISPLACEMENT REDUCTION TYPE COMPACTED SAND PILE AND CONSTRUCTION METHOD OF COMPACTED SAND PILE
PROBLEM TO BE SOLVED: To provide a hollow pipe for constructing a compacted sand pile and a construction method of a compacted sand pile with high construction efficiency, which solve displacement problems that adversely affect existing structures.SOLUTION: A step of jetting jet water from the injection port 13 while rotating a hollow pipe 1 which have an inclined blade 12 on an outer peripheral surface of the hollow pipe main body 11 and an injection port 13 for jet water jetting around the hollow pipe at a tip end portion of the hollow pipe main body 11, and penetrating the hollow pipe to a predetermined depth with loosing around the hollow pipe is performed. A step of discharging a sand pile material 19 in the hollow pipe 1 with an appropriate length drawn out from the hollow pipe and a step of driving-back the hollow pipe 1 are sequentially repeated until reaching the surface of the earth, and a compacted sand pile 42 is formed in the soft ground.SELECTED DRAWING: Figure 6
【課題】既存構造物に悪影響をもたらす変位の問題を解消すると共に、施工効率が良い締固め砂杭造成用中空管及び締固め砂杭造成工法を提供すること。【解決手段】中空管本体１１の外周面に傾斜羽根１２と、中空管本体１１の先端部に中空管周りにジェット水を噴射する噴射口１３とを形成した中空管１を回転させつつ、噴射口１３からジェット水を噴射し、中空管周りを緩ませながら所定の深度まで貫入する工程と、中空管１を適宜の長さ引き抜き中空管内の砂杭材料１９を排出する工程と中空管１を打ち戻しする工程とを順次、地表に至るまで繰り返して、軟弱地盤中に締固め砂杭４２を造成する工程とを行う。【選択図】図６
HOLLOW PIPE FOR CONSTRUCTING DISPLACEMENT REDUCTION TYPE COMPACTED SAND PILE AND CONSTRUCTION METHOD OF COMPACTED SAND PILE
PROBLEM TO BE SOLVED: To provide a hollow pipe for constructing a compacted sand pile and a construction method of a compacted sand pile with high construction efficiency, which solve displacement problems that adversely affect existing structures.SOLUTION: A step of jetting jet water from the injection port 13 while rotating a hollow pipe 1 which have an inclined blade 12 on an outer peripheral surface of the hollow pipe main body 11 and an injection port 13 for jet water jetting around the hollow pipe at a tip end portion of the hollow pipe main body 11, and penetrating the hollow pipe to a predetermined depth with loosing around the hollow pipe is performed. A step of discharging a sand pile material 19 in the hollow pipe 1 with an appropriate length drawn out from the hollow pipe and a step of driving-back the hollow pipe 1 are sequentially repeated until reaching the surface of the earth, and a compacted sand pile 42 is formed in the soft ground.SELECTED DRAWING: Figure 6
【課題】既存構造物に悪影響をもたらす変位の問題を解消すると共に、施工効率が良い締固め砂杭造成用中空管及び締固め砂杭造成工法を提供すること。【解決手段】中空管本体１１の外周面に傾斜羽根１２と、中空管本体１１の先端部に中空管周りにジェット水を噴射する噴射口１３とを形成した中空管１を回転させつつ、噴射口１３からジェット水を噴射し、中空管周りを緩ませながら所定の深度まで貫入する工程と、中空管１を適宜の長さ引き抜き中空管内の砂杭材料１９を排出する工程と中空管１を打ち戻しする工程とを順次、地表に至るまで繰り返して、軟弱地盤中に締固め砂杭４２を造成する工程とを行う。【選択図】図６
HOLLOW PIPE FOR CONSTRUCTING DISPLACEMENT REDUCTION TYPE COMPACTED SAND PILE AND CONSTRUCTION METHOD OF COMPACTED SAND PILE
変位低減型締固め砂杭造成用中空管及び締固め砂杭造成方法
ISOTANI SHUJI (author) / NEGISHI YASUAKI (author) / YABE HIROSHI (author)
2018-05-17
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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