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A platform for research: civil engineering, architecture and urbanism
ESTIMATION COLUMNAR DIAGRAM CREATION METHOD BY MICROTREMOR MEASUREMENT, AND PROGRAM
To provide a ground investigation method which compensates or replaces a conventional ground investigation method, and can be implemented with space saving, low noise and low cost in short time.SOLUTION: An estimation columnar diagram creation method includes: an Hfi/Vfi ratio calculation step of calculating an Hfi/Vfi ratio obtained by dividing a Fourier amplitude Hfi corresponding to a period Ti (i=1,2,3,...n (the number of layers)) of a horizontal component of microtremor of a ground measured with one microtremor measurement sensor by a Fourier amplitude Vfi corresponding to the period Ti of a vertical component of microtremor, at an arbitrary measurement point of the ground surface; and an estimation columnar diagram creation step of determining an Ni value in a depth Hi from a relationship between the period Ti and the depth Hi from the ground surface and a relationship between the Hfi/Vfi ratio and the Ni value, and creating an estimation columnar diagram at the measurement point.SELECTED DRAWING: Figure 2
【課題】従来からある地盤調査方法を補完し、あるいは、これに置き換わる、省スペース、低騒音、低コストかつ短時間で実施可能な地盤調査方法を提供することを課題とする。【解決手段】任意の地表面の計測地点において、常時微動計測センサ１台で計測した地盤の常時微動の水平成分の周期Ｔｉ（ｉ＝１，２，３，・・・ｎ（層の数））に対応するフーリエ振幅Ｈｆｉを、前記常時微動の垂直成分の前記周期Ｔｉに対応するフーリエ振幅Ｖｆｉで除したＨｆｉ／Ｖｆｉ比を算出するＨｆｉ／Ｖｆｉ比算出ステップと、前記周期Ｔｉと前記地表面からの深さＨｉの関係、及び前記Ｈｆｉ／Ｖｆｉ比とＮｉ値の関係から、前記深さＨｉにおける前記Ｎｉ値を求め、前記計測地点における推定柱状図を作成する推定柱状図作成ステップと、を含むことを特徴とする推定柱状図作成方法。【選択図】図２
ESTIMATION COLUMNAR DIAGRAM CREATION METHOD BY MICROTREMOR MEASUREMENT, AND PROGRAM
To provide a ground investigation method which compensates or replaces a conventional ground investigation method, and can be implemented with space saving, low noise and low cost in short time.SOLUTION: An estimation columnar diagram creation method includes: an Hfi/Vfi ratio calculation step of calculating an Hfi/Vfi ratio obtained by dividing a Fourier amplitude Hfi corresponding to a period Ti (i=1,2,3,...n (the number of layers)) of a horizontal component of microtremor of a ground measured with one microtremor measurement sensor by a Fourier amplitude Vfi corresponding to the period Ti of a vertical component of microtremor, at an arbitrary measurement point of the ground surface; and an estimation columnar diagram creation step of determining an Ni value in a depth Hi from a relationship between the period Ti and the depth Hi from the ground surface and a relationship between the Hfi/Vfi ratio and the Ni value, and creating an estimation columnar diagram at the measurement point.SELECTED DRAWING: Figure 2
【課題】従来からある地盤調査方法を補完し、あるいは、これに置き換わる、省スペース、低騒音、低コストかつ短時間で実施可能な地盤調査方法を提供することを課題とする。【解決手段】任意の地表面の計測地点において、常時微動計測センサ１台で計測した地盤の常時微動の水平成分の周期Ｔｉ（ｉ＝１，２，３，・・・ｎ（層の数））に対応するフーリエ振幅Ｈｆｉを、前記常時微動の垂直成分の前記周期Ｔｉに対応するフーリエ振幅Ｖｆｉで除したＨｆｉ／Ｖｆｉ比を算出するＨｆｉ／Ｖｆｉ比算出ステップと、前記周期Ｔｉと前記地表面からの深さＨｉの関係、及び前記Ｈｆｉ／Ｖｆｉ比とＮｉ値の関係から、前記深さＨｉにおける前記Ｎｉ値を求め、前記計測地点における推定柱状図を作成する推定柱状図作成ステップと、を含むことを特徴とする推定柱状図作成方法。【選択図】図２
ESTIMATION COLUMNAR DIAGRAM CREATION METHOD BY MICROTREMOR MEASUREMENT, AND PROGRAM
常時微動計測による推定柱状図作成方法、プログラム
IWATA SHINJI (author) / TAMURA KIMIKO (author)
2019-10-31
Patent
Electronic Resource
Japanese
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