微动勘探在城市岩土工程勘察中的应用效果研究  

The application effect study of microtremor survey in urban geotechnical investigation

作　　者：夏辉 唐浩 刘艺 胡振联 Xia Hui;Tang Hao;Liu Yi;Hu Zhenlian(China JIKAN Research Institute of Engineering Investigations and Design Co.,Ltd.,Xi’an Shaanxi 710043,China;Shaanxi Laboratory for the Property and Treatment of Special Soil and Rock,Xi’an Shaanxi 710043,China)

机构地区：[1]机械工业勘察设计研究院有限公司,陕西西安710043 [2]陕西省特殊岩土性质与处理重点实验室,陕西西安710043

出　　处：《山西建筑》2025年第8期88-93,共6页Shanxi Architecture

摘　　要：微动勘探作为一种新型地球物理勘探技术,在岩土工程勘察领域展现出独特优势。文章介绍了微动勘探的基本原理,通过使用扩展空间自相关(ESPAC)法提取频散曲线,反演剪切波速,对不同工况下的微动勘探测试和钻孔剪切波速测试进行对比试验,得到浅层微动勘探测试反演剪切波速的有效性以及微动勘探测试对城市活动的抗干扰性。最后在场地布设了三处线性台阵,通过频散曲线和剪切波速等值线推断的工程地质分层与附近钻孔工程地质分层吻合度较高,并通过反演的剪切波速值查明了场地覆盖层厚度,验证了微动勘探在城市岩土工程勘察中的适用性。As an emerging geophysical exploration technology,microtremor survey demonstrates unique advantages in geotechnical engineering investigations.This paper introduces the fundamental principles of microtremor survey.By employing the Extended Spatial Auto-Correlation(ESPAC)method to extract dispersion curves and invert shear wave velocities,comparative experiments were conducted between microtremor tests and borehole shear wave velocity tests under different working conditions.The results confirm the effectiveness of shallow microtremor survey in shear wave velocity inversion and its anti-interference capability against urban ambient noise.Three linear arrays were deployed on-site,and the engineering geological stratification inferred from dispersion curves and shear wave velocity contour maps showed high consistency with borehole-based geological stratification data.Additionally,the thickness of the overburden layer was determined using inverted shear wave velocities,validating the applicability of microtremor survey in urban geotechnical engineering investigations.

关 键 词：微动勘探 扩展空间自相关法 频散曲线 剪切波速 岩土工程勘察 

分 类 号：TU195[建筑科学—建筑理论]