Development of analysis system for shallow subsurface by geophysical prospecting methods

浅层物探方法分析系统开发

• 批准号: 07555329
• 负责人: SASSA Koichi
• 金额: $ 4.67万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555329/
• 关键词: Exploration geophysics; Reflection method; Seismic tomography; Ground penetrating radar; Electrical prospecting; Microtremors; Integrated interpretation

Recently, interest in subsurface, especially shallow part of the earth down to several ten meters is rapidly growing. Subsurface information is required for urban development and construction, utilization of subsurface space and earthquake disaster prevention.This research aims to develop an interpretation system of shallow subsurface structure by use of geophysical prospecting techniques. By integrating the results analyzed independently by several geophysical methods, a detailed subsurface information will be obtained. The result of this research is as follows.1.A practical method for forward prediction of tunnel face by seismic wave was developed. The result of field data agrees well with geological structure of the site.2.A seismic refraction tomography method that uses conventional refraction data was developed. It can image the velocity structure of shallow subsurface accurately.3.An inversion method of electrical resistivity data was developed. It was applied to a subsurface environment monitoring.4.An accurate method to estimate the shallow structure by use of the array measurement of short-period microtremors was developed.5.A simple method to estimate the basic structure of basin was developed by use of spectral analysis of horizontal and vertical movement of microtremors.The accuracy of each prospecting method is greatly improved. Consequently, an integrated interpretation becomes possible. The subsurface structure of the basin will be interpreted from the basic structure to its shallow part.

近年来，人们对地下，特别是地下几十米的浅层的兴趣正在迅速增长。城市开发建设、地下空间利用和地震灾害防治都需要地下信息，本研究旨在开发一套利用地球物理勘探技术进行浅层地下构造解释的系统。综合几种地球物理方法各自独立分析的结果，可获得详细的地下信息。研究结果如下：1.提出了一种利用地震波进行隧道掌子面超前预报的实用方法。研究了利用常规折射资料进行地震折射层析成像的方法。提出了一种电阻率数据反演方法。4.提出了利用短周期地脉动台阵测量准确估计盆地浅层结构的方法; 5.提出了利用地脉动水平和垂直运动的谱分析估计盆地基本结构的简单方法，大大提高了各种勘探方法的精度。因此，综合解释成为可能。盆地的地下结构将从基本结构解释到其浅部。

项目成果

渡辺 俊樹: "既知の情報を用いた制約つき速度再構成による弾性波トモグラフィ解析の精度の向上" 材料. 44. 874-879 (1995)

Toshiki Watanabe：“使用已知信息通过约束速度重建提高弹性波断层扫描分析的准确性”材料 44. 874-879 (1995)。

Sugano, T.: "Subsurface inhomogeneity environment monitoring by direct current potential methods" Proc.of Society of Material Science Japan. 61-62 (1996)

Sugano, T.：“通过直流电势方法监测地下不均匀环境”Proc.of Society of Material Science Japan。

WATANABE,T.: "Seismic traveltime tomography in anisotropic heterogenous media" Jouranal of Applied Geophysics. 35. 133-143 (1996)

WATANABE,T.：“各向异性异质介质中的地震走时断层扫描”应用地球物理学杂志。

菅野強: "直流電位法による地下不均質環境モニタリング" 日本材料学会講演論文集. 61-62 (1996)

Tsuyoshi Kanno：“利用直流电势法监测地下异质环境”，日本材料科学会论文集 61-62 (1996)。

Sugano, T.: "Evaluation of electrode array effects in reconstructed resistivity image for ground investigation technique" Journal of the Japan Society of Engineering Geology. 36. 5-17 (1996)

Sugano, T.：“地面勘察技术重建电阻率图像中电极阵列效应的评估”日本工程地质学会杂志。