A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
GROUND SURVEY METHOD AND GROUND SURVEY DEVICE
PROBLEM TO BE SOLVED: To provide a ground survey method and a ground survey device in which the propagation efficiency of an impact energy due to the frictional force between an outer circumferential surface of a rod and the ground can be evaluated easily and reliably without rotating the rod, and thereby the mechanical characteristic (penetration resistance value) of the ground can be grasped with higher accuracy.SOLUTION: A load sensor 12 is incorporated to the intrusion 2 of the tip of a rod 1, and the intrusion 2 is penetrated into the ground by striking the rod 1. An amount of the penetration and a response load from the ground contacting with the intrusion 2 with the strike penetration are measured. The efficiency of energy in the intrusion depth is calculated from the amount of penetration and the response load obtained, and a penetration resistance value Nd is corrected.
【課題】ロッドの外周面と地盤との間の摩擦力に起因する打撃エネルギーの伝播効率を、ロッドを回転させることなく容易かつ確実に評価することができ、よって地盤の力学特性（貫入抵抗値）をより高い精度で把握することが可能になる地盤調査方法および地盤調査装置を提供する。【解決手段】ロッド１の先端の貫入体２に荷重センサ１２を組み込み、ロッド１を打撃して貫入体２を地盤に貫入させ、その貫入量と打撃貫入に伴う貫入体２に接する上記地盤からの応答荷重を測定し、得られた上記貫入量および応答荷重から、当該貫入体深度におけるエネルギー効率を算出して貫入抵抗値Ｎｄを補正する。【選択図】図１
GROUND SURVEY METHOD AND GROUND SURVEY DEVICE
PROBLEM TO BE SOLVED: To provide a ground survey method and a ground survey device in which the propagation efficiency of an impact energy due to the frictional force between an outer circumferential surface of a rod and the ground can be evaluated easily and reliably without rotating the rod, and thereby the mechanical characteristic (penetration resistance value) of the ground can be grasped with higher accuracy.SOLUTION: A load sensor 12 is incorporated to the intrusion 2 of the tip of a rod 1, and the intrusion 2 is penetrated into the ground by striking the rod 1. An amount of the penetration and a response load from the ground contacting with the intrusion 2 with the strike penetration are measured. The efficiency of energy in the intrusion depth is calculated from the amount of penetration and the response load obtained, and a penetration resistance value Nd is corrected.
【課題】ロッドの外周面と地盤との間の摩擦力に起因する打撃エネルギーの伝播効率を、ロッドを回転させることなく容易かつ確実に評価することができ、よって地盤の力学特性（貫入抵抗値）をより高い精度で把握することが可能になる地盤調査方法および地盤調査装置を提供する。【解決手段】ロッド１の先端の貫入体２に荷重センサ１２を組み込み、ロッド１を打撃して貫入体２を地盤に貫入させ、その貫入量と打撃貫入に伴う貫入体２に接する上記地盤からの応答荷重を測定し、得られた上記貫入量および応答荷重から、当該貫入体深度におけるエネルギー効率を算出して貫入抵抗値Ｎｄを補正する。【選択図】図１
GROUND SURVEY METHOD AND GROUND SURVEY DEVICE
地盤調査方法および地盤調査装置
SAWADA SHUNICHI (author)
2015-12-24
Patent
Electronic Resource
Japanese
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