| 近地表弹性介质瑞雷波勘探研究进展与展望 |
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| 引用本文： | 宋先海,张学强,王一鸣,侯喜,李翔.近地表弹性介质瑞雷波勘探研究进展与展望[J].地质科技通报,2020,39(5):173-182. |
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| 作者姓名： | 宋先海 张学强 王一鸣 侯喜 李翔 |
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| 基金项目： | 国家自然科学基金项目41874150国家自然科学基金项目42074164 |
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| 摘 要： | 瑞雷波法已在研究地球内部结构、近地表地球物理工程和超声无损检测等领域中获得了广泛应用，尤其是近年来瑞雷波法作为近地表场地表征新兴领域的前沿技术已成为国际学术研究与应用的热点。对国内外近地表弹性介质瑞雷波勘探的主要研究成果与进展进行了综述，通过对瑞雷波勘探现有的研究成果和进展密切追踪发现当前近地表瑞雷波勘探主要基于水平地表弹性水平层状介质模型，利用单分量瑞雷波相速度频散曲线单目标反演获得一维横波速度剖面和相关岩土力学参数。但是，该方法也存在着现有瑞雷波频散曲线反演极易出现模式误识别、现有单分量单目标瑞雷波反演未充分利用多分量信息、现有瑞雷波相速度反演未充分利用群速度传播特性、现有瑞雷波反演未充分利用质点椭圆极化振动特性等挑战性学术难题和不足。基于上述问题，建议未来近地表弹性介质瑞雷波勘探重点研究方向应集中在进行多模式表面波全速度谱反演研究、多站多分量表面波相速度多目标全速度谱反演研究、单站多分量表面波群速度多目标全速度谱反演研究和单站多分量表面波椭圆极化振动特性多目标反演研究。由此构建新的近地表多分量瑞雷波多目标全速度谱反演理论，引领多分量瑞雷波多目标反演学科前沿，拓展现有单分量瑞雷波单目标反演理论范畴，推动多分量瑞雷波高精度实用勘探技术的发展。
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| 关 键 词： | 多分量瑞雷波 多分量表面波 多模式频散曲线 相速度谱 群速度谱 |
| 收稿时间： | 2020-06-15 |
Recent advances and prospects of near surface elastic Rayleigh waves |
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| Abstract: | Rayleigh waves have played an important role in detection of earth internal structure, near surface geophysical engineering, and ultrasonic nondestructive testing. In particular, in recent years a number of studies have explored shallow soil profiles for near surface applications. The main achievements and progress of near surface elastic Rayleigh wave exploration worldwide are summarized. Analyzing the existing research results, we find that current Rayleigh wave research focus on reconstruction of one dimension shear-wave velocity profiles and estimation of geomechanical parameters by single-objective phase velocity dispersion curve inversion of single-component surface waves, which is based on horizontally layered elastic earth model. As a result, this will lead to mode misidentification of multimode dispersion curves, not fully utilizing multicomponent phase velocities and group velocities, or elliptical polarization characteristics of multicomponent surface waves when multimode phase velocity dispersion curves of single-component Rayleigh waves are inverted by single-objective optimization scheme. To deal with challenging difficulties and obstacles presented by previous literature reviews, the future main research directions of near surface elastic Rayleigh waves are proposed to focus on full velocity spectrum (FVS) inversion of multimode surface waves, multi-offset multicomponent phase velocity analysis of surface waves, single-offset multicomponent group velocity analysis of surface waves, single-offset multicomponent polarization analysis of surface waves. This research will present new theories and its methodologies on multicomponent FVS inversion of near surface Rayleigh waves by multi-objective optimizer, will expand conventional theories of single-objective inversion of single-component surface waves, and will promote the progress of high-precision multicomponent surface wave exploration for near surface applications. |
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