| 玉溪盆地浅层土层颗粒特征与剪切波速的关系研究 |
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| 引用本文： | 李铁飞,陈学良,高孟潭.玉溪盆地浅层土层颗粒特征与剪切波速的关系研究[J].地震学报,2016,38(6):934-941. |
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| 作者姓名： | 李铁飞 陈学良 高孟潭 |
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| 作者单位： | 中国北京 100081 中国地震局地球物理研究所 |
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| 基金项目： | 国家公益性行业专项201008001中国地震局地球物理研究所基本业务专项DQJB14B02中国地震局地球物理研究所基本业务专项(DQJB14B02)和国家公益性行业专项(201008001)共同资助 |
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| 摘 要： | 以玉溪盆地16个钻孔的柱状图和波速数据为基础，统计分析了具有不同颗粒特征的土层埋深与剪切波速之间的关系，给出了玉溪盆地内角砾、砾石、圆砾、砾砂、细砂和淤泥质黏土等土层在80 m深度范围内深度与剪切波速的经验关系.通过分析不同颗粒大小、不同磨圆程度土层剪切波速特征，认为土层的波速特征与其形成时所处的沉积环境有一定的关系，并以玉溪盆地浅层土层为例，给出了一种根据具有明显颗粒特征土层估算未测波速钻孔的等效剪切波速的方法.
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| 关 键 词： | 颗粒特征 剪切波速 沉积环境 统计分析 |
| 收稿时间： | 2016-03-18 |
Relationship between particle characteristics and shear wave velocity of shallow soil in Yuxi basin |
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| Institution: | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | Based on the 16 borehole histograms and velocity data in Yuxi basin, this paper statistically analyzes the relationship between the depth and shear wave velocity of the soils with different particle characteristics, and shows the empirical relationship between depth and shear wave velocity for soil breccia, gravel, round gravel, gravel sand, fine sand and silty clay within 80 m depth in Yuxi basin. It is considered that the velocity characteristics of the soil have a certain relationship with the sedimentary environment by analyzing the soil shear wave velocity of different particle size and psephicity. With shallow soil in Yuxi basin as an example, a method to estimate the shear wave velocity of boreholes is presented in this paper, which can be used in borehole without velocity data. |
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