A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
HOLE-DRILLING METHOD
PROBLEM TO BE SOLVED: To provide a hole-drilling method capable of determining whether or not to arrive at a target layer, even in a drilled hole for vertically moving a rod in the comparatively short drilled-hole depth being small in a resistance value of an electric motor by the hole-drilling ground, when drilling a boring hole.SOLUTION: A ground is drilled by vertically moving a hole-drilling rod, and an effective use electric current is arithmetically operated from an electric current supplied to an electric motor for rotating the hole-drilling rod and a hole-drilling time, and when the effective use electric current becomes a threshold value or more, it is determined as arriving up a layer of becoming a support layer, and the effective use electric current is a numeric value of multiplying the electric current by time of drilling the ground, and the time of drilling the ground is time required for drilling the undrilled ground, and does not include time for vertically moving in an already hole-drilled area.SELECTED DRAWING: Figure 3
【課題】ボーリング孔を削孔する際に、削孔している地盤による電動機の抵抗値が小さく、比較的短い削孔深度でロッドを上下動する削孔であっても、目標とする層に到達したか否かを判断することが出来る削孔方法の提供。【解決手段】削孔用ロッドを上下動して地盤を削孔し、削孔用ロッドを回転する電動機に供給される電流と削孔している時間から実効使用電流を演算し、実効使用電流がしきい値以上となったならば支持層となり得る層まで到達したと判断し、実効使用電流は前記電流に地盤を削孔している時間を乗じた数値であり、地盤を削孔している時間は、未削孔地盤を削孔するのに要する時間であり、既に削孔された領域を上下動する時間を包含しない。【選択図】図３
HOLE-DRILLING METHOD
PROBLEM TO BE SOLVED: To provide a hole-drilling method capable of determining whether or not to arrive at a target layer, even in a drilled hole for vertically moving a rod in the comparatively short drilled-hole depth being small in a resistance value of an electric motor by the hole-drilling ground, when drilling a boring hole.SOLUTION: A ground is drilled by vertically moving a hole-drilling rod, and an effective use electric current is arithmetically operated from an electric current supplied to an electric motor for rotating the hole-drilling rod and a hole-drilling time, and when the effective use electric current becomes a threshold value or more, it is determined as arriving up a layer of becoming a support layer, and the effective use electric current is a numeric value of multiplying the electric current by time of drilling the ground, and the time of drilling the ground is time required for drilling the undrilled ground, and does not include time for vertically moving in an already hole-drilled area.SELECTED DRAWING: Figure 3
【課題】ボーリング孔を削孔する際に、削孔している地盤による電動機の抵抗値が小さく、比較的短い削孔深度でロッドを上下動する削孔であっても、目標とする層に到達したか否かを判断することが出来る削孔方法の提供。【解決手段】削孔用ロッドを上下動して地盤を削孔し、削孔用ロッドを回転する電動機に供給される電流と削孔している時間から実効使用電流を演算し、実効使用電流がしきい値以上となったならば支持層となり得る層まで到達したと判断し、実効使用電流は前記電流に地盤を削孔している時間を乗じた数値であり、地盤を削孔している時間は、未削孔地盤を削孔するのに要する時間であり、既に削孔された領域を上下動する時間を包含しない。【選択図】図３
HOLE-DRILLING METHOD
削孔工法
KUMEGAWA MASANORI (author) / SOMA HIROSHI (author) / NORO YOSHITAKA (author)
2018-01-25
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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