Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
EVALUATION METHOD FOR GROUND OR BEDROCK
To provide a method for evaluating adhesive force and a shear resistance angle of bedrock without using a special device, even in ground or bedrock which is difficult to collect a sample having a size suitable for a compression test.SOLUTION: An evaluation method for ground or bedrock includes the steps of: drilling ground or bedrock (bedrock G) containing ground water, performing an in-hole loading test, and deriving a placement pressure and a yield pressure of the ground or the bedrock; performing the in-hole loading test in a state in which the placement pressure to a probe 20 is changed, and deriving the placement pressure and the yield pressure of the ground or the bedrock; drawing a plurality of stress circles derived from the placement pressure and the yield pressure, in a coordinate system with a vertical stress generated in the ground or the bedrock as a horizontal axis and a shear stress as a vertical axis; drawing a tangent common to the plurality of stress circles; and deriving the adhesive force of the ground or the bedrock from an intersection between the tangent and the vertical axis, and deriving a shear resistance angle of the ground or the bedrock from inclination of the tangent.SELECTED DRAWING: Figure 1
【課題】圧縮試験に適した大きさの供試体を採取し難い地盤や岩盤においても、特殊な機器を用いずに、岩盤の粘着力及びせん断抵抗角を評価する方法を提供する。【解決手段】地盤又は岩盤の評価方法は、地下水を含んだ地盤又は岩盤（岩盤Ｇ）を削孔して孔内載荷試験を実施し、地盤又は岩盤の上載圧及び降伏圧を導出する工程と、プローブ２０への上載圧を変えた状態で孔内載荷試験を実施し、地盤や岩盤の上載圧及び降伏圧を導出する工程と、地盤又は岩盤に生じる垂直応力を横軸とし、せん断応力を縦軸とする座標系に、上載圧及び降伏圧から導出される複数の応力円を描画する工程と、複数の応力円に共通する接線を描画する工程と、接線と縦軸との交点から地盤又は岩盤の粘着力を導出し、接線の傾きから地盤又は岩盤のせん断抵抗角を導出する工程と、を備える。【選択図】図１
EVALUATION METHOD FOR GROUND OR BEDROCK
To provide a method for evaluating adhesive force and a shear resistance angle of bedrock without using a special device, even in ground or bedrock which is difficult to collect a sample having a size suitable for a compression test.SOLUTION: An evaluation method for ground or bedrock includes the steps of: drilling ground or bedrock (bedrock G) containing ground water, performing an in-hole loading test, and deriving a placement pressure and a yield pressure of the ground or the bedrock; performing the in-hole loading test in a state in which the placement pressure to a probe 20 is changed, and deriving the placement pressure and the yield pressure of the ground or the bedrock; drawing a plurality of stress circles derived from the placement pressure and the yield pressure, in a coordinate system with a vertical stress generated in the ground or the bedrock as a horizontal axis and a shear stress as a vertical axis; drawing a tangent common to the plurality of stress circles; and deriving the adhesive force of the ground or the bedrock from an intersection between the tangent and the vertical axis, and deriving a shear resistance angle of the ground or the bedrock from inclination of the tangent.SELECTED DRAWING: Figure 1
【課題】圧縮試験に適した大きさの供試体を採取し難い地盤や岩盤においても、特殊な機器を用いずに、岩盤の粘着力及びせん断抵抗角を評価する方法を提供する。【解決手段】地盤又は岩盤の評価方法は、地下水を含んだ地盤又は岩盤（岩盤Ｇ）を削孔して孔内載荷試験を実施し、地盤又は岩盤の上載圧及び降伏圧を導出する工程と、プローブ２０への上載圧を変えた状態で孔内載荷試験を実施し、地盤や岩盤の上載圧及び降伏圧を導出する工程と、地盤又は岩盤に生じる垂直応力を横軸とし、せん断応力を縦軸とする座標系に、上載圧及び降伏圧から導出される複数の応力円を描画する工程と、複数の応力円に共通する接線を描画する工程と、接線と縦軸との交点から地盤又は岩盤の粘着力を導出し、接線の傾きから地盤又は岩盤のせん断抵抗角を導出する工程と、を備える。【選択図】図１
EVALUATION METHOD FOR GROUND OR BEDROCK
地盤又は岩盤の評価方法
KOMURA YUICHI (Autor:in) / TAYA YUJI (Autor:in) / HAMADA JUNJI (Autor:in)
21.12.2023
Patent
Elektronische Ressource
Japanisch
IPC:
E02D
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Gründungen