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A platform for research: civil engineering, architecture and urbanism
GROUND IMPROVEMENT METHOD OF PILE DRAWING HOLE
To improve a ground across the whole length of a pile drawing hole after drawing an existing pile using an edge cutting/drawing method, etc.SOLUTION: A volume adjusting sand 16 is fed into a pile drawing hole 12 remaining after drawing an existing pile. A hole bottom deposit sediment 14 is deposited on a hole bottom of the pile drawing hole 12. Then, while discharging a solidification material slurry from a stirring device 22, the sediment in the pile drawing hole 12 is stirred, to form an improvement body 30 filling the pile drawing hole 12. When a top face of the improvement body 30 in the pile drawing hole 12 is lower than a surrounding soil surface after drawing the stirring device 22, an improved soil 31 or a drilling generated soil is back-filled between a top end of the improvement body 30 and the surrounding soil surface.SELECTED DRAWING: Figure 1
【課題】縁切・引抜工法等を用いて既存杭を引き抜いた後の杭引き抜き孔の全長に渡り地盤を改良する。【解決手段】既存杭を引き抜いた後に残る杭引き抜き孔１２に体積調整砂１６を投入する。杭引き抜き孔１２の孔底には孔底堆積土１４が堆積している。その後、撹拌装置２２から固化材スラリーを吐出させながら杭引き抜き孔１２内の土砂を撹拌し、杭引き抜き孔１２を充填する改良体３０を形成する。撹拌装置２２の引き抜き後に杭引き抜き孔１２内の改良体３０の天面が周辺土壌表面より低い位置にある場合、改良体３０の天端と周辺地盤表面との間を改良土３１または掘削発生土により埋め戻す。【選択図】図１
GROUND IMPROVEMENT METHOD OF PILE DRAWING HOLE
To improve a ground across the whole length of a pile drawing hole after drawing an existing pile using an edge cutting/drawing method, etc.SOLUTION: A volume adjusting sand 16 is fed into a pile drawing hole 12 remaining after drawing an existing pile. A hole bottom deposit sediment 14 is deposited on a hole bottom of the pile drawing hole 12. Then, while discharging a solidification material slurry from a stirring device 22, the sediment in the pile drawing hole 12 is stirred, to form an improvement body 30 filling the pile drawing hole 12. When a top face of the improvement body 30 in the pile drawing hole 12 is lower than a surrounding soil surface after drawing the stirring device 22, an improved soil 31 or a drilling generated soil is back-filled between a top end of the improvement body 30 and the surrounding soil surface.SELECTED DRAWING: Figure 1
【課題】縁切・引抜工法等を用いて既存杭を引き抜いた後の杭引き抜き孔の全長に渡り地盤を改良する。【解決手段】既存杭を引き抜いた後に残る杭引き抜き孔１２に体積調整砂１６を投入する。杭引き抜き孔１２の孔底には孔底堆積土１４が堆積している。その後、撹拌装置２２から固化材スラリーを吐出させながら杭引き抜き孔１２内の土砂を撹拌し、杭引き抜き孔１２を充填する改良体３０を形成する。撹拌装置２２の引き抜き後に杭引き抜き孔１２内の改良体３０の天面が周辺土壌表面より低い位置にある場合、改良体３０の天端と周辺地盤表面との間を改良土３１または掘削発生土により埋め戻す。【選択図】図１
GROUND IMPROVEMENT METHOD OF PILE DRAWING HOLE
杭引き抜き孔の地盤改良方法
KITAJIMA AKIRA (author) / MISHIMA SHINYA (author) / MARU TAKAHIRO (author) / MIYAZAWA SHO (author) / TOSAUCHI YUSUKE (author) / CHIGUSA NOBUYUKI (author) / ASANO KOJI (author) / HASEGAWA TAKUMA (author)
2021-10-28
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
AGITATION DEVICE AND GROUND IMPROVEMENT METHOD OF PILE BURYING HOLE
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