| 基于细化分层法探讨面波频散曲线反演参数的简化 |
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| 引用本文： | 邵广周,李庆春.基于细化分层法探讨面波频散曲线反演参数的简化[J].地球科学与环境学报,2011(3):317-320. |
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| 作者姓名： | 邵广周 李庆春 |
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| 作者单位： | 长安大学西部矿产资源与地质工程教育部重点实验室;长安大学地质工程与测绘学院; |
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| 基金项目： | 国家自然科学基金项目(41004043); 中央高校基本科研业务费专项项目(CHD2010JC057); 交通部国家西部交通建设科技项目(200731881262); 国家高技术研究发展计划项目(2007AA06Z103) |
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| 摘 要： | 常规频散曲线反演过程中需要不停地改变分层数、层厚度和层速度等参数,实现过程相对繁琐,而采用细化分层法对反演参数进行简化则避免了上述缺点。具体思路为:根据目的层探测深度(如20m)将地下介质分为若干个(20个)厚度为1m的薄层和1个均匀半空间层(共21层),这样在反演中分层数和层厚度均为已知参量,反演过程只需修改速度参数即可,避免了改变分层数和层厚度等参数,显著简化了反演计算过程。正演计算和反演结果均表明:细化分层与实际分层计算出的频散曲线是等效的,细化分层反演结果的总体效果与真实模型非常接近,这说明细化分层方法用于频散曲线反演是切实可行且有效的;将地下介质划分为1m厚的薄层,反演后每层均可得到1个横波速度,能满足反演分辨率的要求;由于实际地下介质的速度是随深度渐变的,细化分层后比按频散曲线拐点分层(每分层的厚度可能是几米或几十米,同一分层内介质的横波速度相等)更接近实际情况。
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| 关 键 词： | 面波 频散曲线 细化分层 反演 横波速度 瑞雷波 |
Study on Parameter Simplifying in Dispersion Curves Inversion of Surface Wave Based on Subdividing Layer Method |
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| SHAO Guang-zhou,LI Qing-chun.Study on Parameter Simplifying in Dispersion Curves Inversion of Surface Wave Based on Subdividing Layer Method[J].Journal of Earth Sciences and Environment,2011(3):317-320. |
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| Authors: | SHAO Guang-zhou LI Qing-chun |
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| Institution: | SHAO Guang-zhou1,2,LI Qing-chun1,2 (1.Key Laboratory of Western Mineral Resources and Geological Engineering of Ministry of Education,Chang'an University,Xi'an 710054,Shaanxi,China,2.School of Geological Engineering and Surveying,China) |
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| Abstract: | Such parameters as layer numbers,thickness and velocity of each layer need to be modified constantly in the conventional inversion of dispersion curves,and the realization process is relatively troublesome.Aiming at this disadvantage,a subdividing layer method to inverse the dispersion curves of surface wave is introduced.The detailed thought is as follows: according to the depth of objective layer(such as 20 m),the underground media will be subdivided into several thin layers(20 layers) with the thickness ... |
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| Keywords: | surface wave dispersion curve subdividing layer inversion shear velocity rayleigh wave |
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