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 reach a target layer, even in the drilling in which a rod is vertically moved at a comparatively short hole drilling depth and with a small resistance value of an electric motor with respect to the drilled ground, when drilling a boring hole.SOLUTION: The hole is drilled in the ground by vertically moving the hole drilling rod, and effective use electric power is arithmetically operated from an electric current supplied to the electric motor for rotating the hole drilling rod and a hole drilling time, and when the effective use electric power becomes a threshold value or more, it is determined as reaching up to a layer capable of becoming as a support layer, and the effective use electric power is a numeric value obtained by multiplying the electric current by the time of drilling the hole in the ground, and the time of drilling the hole in the ground is the time required for drilling the hole in the undrilled ground, and does not include the time for vertically moving in an already drilled area.
【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力を演算し、実効使用電力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、実効使用電力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、地盤に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 reach a target layer, even in the drilling in which a rod is vertically moved at a comparatively short hole drilling depth and with a small resistance value of an electric motor with respect to the drilled ground, when drilling a boring hole.SOLUTION: The hole is drilled in the ground by vertically moving the hole drilling rod, and effective use electric power is arithmetically operated from an electric current supplied to the electric motor for rotating the hole drilling rod and a hole drilling time, and when the effective use electric power becomes a threshold value or more, it is determined as reaching up to a layer capable of becoming as a support layer, and the effective use electric power is a numeric value obtained by multiplying the electric current by the time of drilling the hole in the ground, and the time of drilling the hole in the ground is the time required for drilling the hole in the undrilled ground, and does not include the time for vertically moving in an already drilled area.
【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力を演算し、実効使用電力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、実効使用電力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、地盤に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)
2015-06-22
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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