利用天然源面波法进行地基勘探的应用研究  

Research on the Application ofNatural Source Surface Wave Method for Foundation Exploration

作　　者：骆东德 梁成 王超 LUO Dongde;LIANG Cheng;WANG Chao(School of Geophysics and Measurement and Control Technology,East China University of Technology,330063,Nanchang,PRC;Jiangxi Hydropower Engineering Bureau,330096,Nanchang,PRC)

机构地区：[1]东华理工大学地球物理与测控技术学院,南昌330063 [2]江西省水电工程局有限公司,南昌330096

出　　处：《江西科学》2021年第2期330-334,共5页Jiangxi Science

基　　金：东华理工大学研究生创新基金项目(YC2019-S277)。

摘　　要：在我国城市发展过程中,需要详细了解城市的地下地基或地层信息,部分常用的工程地球物理方法受到地面或地下各种干扰的影响,不能满足精度要求。天然源面波技术采集的是自然信号,随机信号源的干扰相对较小,更受到勘探工作者的青睐。数据采集选用了由10个4.5 Hz的低频检波器组成的等边三角型阵列模式进行观测,共计40个测点,由大量微动信号中抽取面波的频散特性,根据面波的频散现象,求出不同频率的地震波的传播速度,通过不同深度反射的面波速度差异,以此探测地下各层的弹性参数,借此进行地层划分,为解决相关地质和城市地下检测问题提供更多真实可靠的参考资料。In the process of urban development in China,it is necessary to understand the underground foundation or stratum information of the city in detail,some commonly used engineering geophysical methods are affected by various ground or underground interference and can not meet the accuracy requirements.The natural source surface wave technology collects natural signals,and the interference of random signal sources is relatively small,so it is more favored by explorers.In data acquisition,an equilateral triangular array model composed of 104.5 Hz low frequency geophones is selected for observation,with a total of 40 measuring points.The dispersion characteristics of surface waves are extracted from a large number of fretting signals.According to the dispersion phenomenon of surface waves,the propagation velocities of seismic waves with different frequencies are calculated.Through the difference of surface wave velocities reflected at different depths,the elastic parameters of underground layers are detected,thus the strata are divided.To provide more real and reliable reference materials for solving related geological and urban underground detection problems.

关 键 词：天然源面波 地基分层 浅层地震勘探 反演 

分 类 号：P631[天文地球—地质矿产勘探]