摘要
建筑场地地球物理勘探条件非常复杂,各种不明机械振动、强电磁波干扰、建筑垃圾、场地狭小及高精度要求等因素均影响着各种地球物理方法的开展,从而使得地球物理勘探在建筑场地岩土勘察中一直未得到广泛应用。首次将微动勘探技术应用于建筑场地岩土勘察,结果表明,该方法在建筑场地类别判别、岩土地层分层、风化残留体探测等方面均有较好的应用效果。文章对微动勘探技术原理进行了简要介绍,对野外观测方式和室内资料处理进行了较详细的论述。首次将微动探测中与地层相关的属性(如:频散曲线、空间自相关系数、H/V谱比、振幅谱、能量谱占比)用于微动资料的综合地质解释,较好地提高了微动资料的地质解释精度和准确度。微动勘探技术应用于建筑场地岩土勘察具有经济、快捷、无损、抗干扰能力强、分辨率高、不需人工震源等优点,在建筑场地勘察中会发挥越来越重要的作用。
The geophysical exploration conditions in construction sites are very complex. All the elements,such as various unknown mechanical vibration,strong electromagnetic interference,construction waste,narrow site and high precision requirement,can affect the usage of geophysical methods. This limits the widely usage of geophysical exploration in construction site survey. This paper describes the application of microtremor to the construction geotechnical engineering investigation for the first time. The good results show the effective application of microtremor on the site classification for construction,the geotechnical stratigraphic stratification,residual weathering detection,etc. This paper briefly introduces the principle of microtremor and discusses more on the field survey and data processing. The paper also includes various attributes related to stratum（such as dispersion curve,spatial autocorrelation coefficient,H/V ratio,amplitude spectrum,the power spectrum proportion）. Jointly utilization of these attributes,we can improve the accuracy of the geological interpretation based on the data from microtremor. The microtremor has the advantages of economy,speed,nondestructive,strong anti-interference,high resolution and no need of artificial source. This new method will play an important role in the investigation of construction sites.
作者
殷勇
吴明和
YIN Yong;WU Minghe(Fujian Provineial Institute of Arehiteetural Design and Researeh Co.,Ltd.,Fuzhou 350001)
出处
《福建建筑》
2018年第10期63-68,共6页
Fujian Architecture & Construction
