A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To shorten the length of a conical column body while reducing the excavation resistance during excavation.SOLUTION: In the present invention, an excavation head (20) having a spiral excavation blade (22) whose diameter is expanded upward from a lower end, and provided with an excavation bit (23) on the excavation blade (22). A step portion (44) whose diameter is gradually increased is formed in a middle portion of the excavation blade (22), and the excavation bit (23) is provided in the step portion (44). In addition, a plurality of the excavation bits (23) are provided on the excavation blade (22), and the excavation bit (23) is provided between the plurality of excavation bits (23) and at a rear position. In addition, the plurality of excavation bits (23) are provided on the excavation blade (22), and the plurality of the excavation bits (23) are shifted back and forth between an inner peripheral side and an outer peripheral side of the excavation blade (22).SELECTED DRAWING: Figure 3
【課題】掘削時の掘削抵抗を低減させながら円錐状のコラム体の長さを短くすること。【解決手段】本発明では、下端から上方に向けて拡径した螺旋状の掘削翼(22)を有し、掘削翼(22)に掘削ビット(23)を設けた掘削ヘッド(20)において、掘削翼(22)の中途部に段階的に拡径させた段部(44)を形成するとともに、段部(44)に掘削ビット(23)を設けることにした。また、前記掘削翼(22)に複数の掘削ビット(23)を設けるとともに、複数の掘削ビット(23)の間であって後方の位置にも掘削ビット(23)を設けることにした。また、前記掘削翼(22)に複数の掘削ビット(23)を設けるとともに、前記掘削翼(22)の内周側と外周側とで前記複数の掘削ビット(23)を前後にずらして配置することにした。【選択図】図３
To shorten the length of a conical column body while reducing the excavation resistance during excavation.SOLUTION: In the present invention, an excavation head (20) having a spiral excavation blade (22) whose diameter is expanded upward from a lower end, and provided with an excavation bit (23) on the excavation blade (22). A step portion (44) whose diameter is gradually increased is formed in a middle portion of the excavation blade (22), and the excavation bit (23) is provided in the step portion (44). In addition, a plurality of the excavation bits (23) are provided on the excavation blade (22), and the excavation bit (23) is provided between the plurality of excavation bits (23) and at a rear position. In addition, the plurality of excavation bits (23) are provided on the excavation blade (22), and the plurality of the excavation bits (23) are shifted back and forth between an inner peripheral side and an outer peripheral side of the excavation blade (22).SELECTED DRAWING: Figure 3
【課題】掘削時の掘削抵抗を低減させながら円錐状のコラム体の長さを短くすること。【解決手段】本発明では、下端から上方に向けて拡径した螺旋状の掘削翼(22)を有し、掘削翼(22)に掘削ビット(23)を設けた掘削ヘッド(20)において、掘削翼(22)の中途部に段階的に拡径させた段部(44)を形成するとともに、段部(44)に掘削ビット(23)を設けることにした。また、前記掘削翼(22)に複数の掘削ビット(23)を設けるとともに、複数の掘削ビット(23)の間であって後方の位置にも掘削ビット(23)を設けることにした。また、前記掘削翼(22)に複数の掘削ビット(23)を設けるとともに、前記掘削翼(22)の内周側と外周側とで前記複数の掘削ビット(23)を前後にずらして配置することにした。【選択図】図３
EXCAVATION HEAD
掘削ヘッド
HONDA MASATAKA (author)
2019-08-08
Patent
Electronic Resource
Japanese
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