地脉动法在黄土地区S波速度构造探测中的应用

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (05): 696-700.

地脉动法在黄土地区S波速度构造探测中的应用

吴志坚1,2，曾立峰1，王兰民1,2，于凯3，陈拓1

（1.中国地震局兰州地震研究所黄土地震工程开放实验室，兰州 730000;2.中国地震局地震预测研究所兰州创新基地，兰州 730000;3.上海交通大学船舶海洋与建筑工程学院，上海 200030）

收稿日期:2010-10-17 出版日期:2011-05-30 发布日期:2011-05-30
基金资助:
中国地震局地震预测研究所基本科研业务费资助项目（2010A76），国家自然科学基金项目（40902094,40974070）

Application of Microtremor Method in Shear Wave Velocity Structure Survey at Loess Regions

WU Zhi-Jian-1, 2 , ZENG Li-Feng-1, WANG Lan-Min-1, 2 , YU Kai-3, CHEN Tuo-1

1. Open Laboratory of Loess Earthquake Engineering, Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China; 2. Lanzhou Innovation Base of Institute of Earthquake Science, China Earthquake Administration, Lanzhou 730000, China; 3. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China)

Received:2010-10-17 Online:2011-05-30 Published:2011-05-30

摘要/Abstract

摘要： 在我国西部典型黄土地区分别进行连续和高密度（25 m×25 m）的地脉动观测，并分析所采集的信号，探讨了地脉动信号的时间稳定性及空间分布规律，利用地脉动水平和垂直方向(H/V)频谱反演地下黄土层的剪切波速度剖面，并与已有的钻孔波速资料进行对比.结果表明：内陆地区的地脉动信号具有良好的时间稳定性;在黄土覆盖场地，利用地脉动测试以获取地下剪切波速度构造的方法具有较好的适应性.

关键词: 地脉动, 黄土, 剪切波速度剖面, 水平和垂直方向(H/V)频谱分析

Abstract: Based on continuous microtremor survey and highdensity microtremor survey respectively at the typical loess areas in the west of China, the time stability and space distribution of microtremor data were studied. The shear wave velocity profile of underground loess layer was obtained using the inversion method of H/V frequency spectrum of microtremor, and contrasting the existing wave velocity data of borehole at this region as well. The results show that the microtremor signal is stable in time range at inland areas of China, and microtremor survey is available and effective for obtaining underground shear wave velocity profile at deep loess sediment ground.

Key words: microtremor, loess, shear wave velocity profile, H/V frequency spectrum analysis

中图分类号:

TU435

吴志坚1, 2, 曾立峰1, 王兰民1, 2, 于凯3, 陈拓1. 地脉动法在黄土地区S波速度构造探测中的应用[J]. 上海交通大学学报（自然版）, 2011, 45(05): 696-700.

WU Zhi-Jian-1, 2 , ZENG Li-Feng-1, WANG Lan-Min-1, 2 , YU Kai-3, CHEN Tuo-1. Application of Microtremor Method in Shear Wave Velocity Structure Survey at Loess Regions[J]. Journal of Shanghai Jiaotong University, 2011, 45(05): 696-700.

参考文献

［1］薄景山, 李秀领, 李山有. 场地条件对地震动影响研究的若干进展［J］. 世界地震工程, 2003,19(2): 1115.

BO Jingshan, LI Xiuling, LI Shanyou. Some progress of study on the effect of site conditions on ground motion［J］. World Earthquake Engineering, 2003, 19(2): 1115.

［2］Che Ailan, Iwatate Takahiro, Ge Xiurun. Study on the applicability of frequency spectrum of microtremor and dynamic characteristics of surface ground in Asia area［J］. Journal of Zhejiang University Science, 2006,7(11): 18561863.

［3］吴志坚，车爱兰，王兰民, 等. 常时微动测试在汶川地震甘肃灾区建筑结构震害调查中的应用［J］. 西北地震学报，2009,31（1）：8690.

WU Zhijian, CHE Ailan, WANG Lanming, et al. Application of micro tremor observation on disaster investigation of the 2008 enchuan earthquake for building structures in the quake hit areas of Gansu province［J］. Northwest Seismology Journal,2009, 31(1)：8690.

［4］Nakamura Y A. A method for dynamic characters estimation of subsurface using microtremors on the ground surface［R］. Tokyo QR of RTRI,1989, 30(1): 2533.［5］Tokimatsu K, Miyadera Y. Characteristics of Rayleighwaves in microtremors and their relation to underground structures［J］.Struct Constr Eng, 1992,439: 8187.

［6］Arai H, Tokimatsu K. Swave velocity profiling by inversion of microtremor H/V spectrum［J］. Bullttin of the Seismological Society of America, 2004, 94(1):5363.

［7］Arai H, Tokimatsu K. Effects of Rayleigh and love waves on microtremor H/V spectra［C］// Proc 12th World Conference on Earthquake Engineering. Auckland:IAEE, 2000：2232.

［8］Che A L, Iwatate Takahiro, Ge X R. Evaluation of dynamic behaviors and damage mechanism of ancient timber architectures［J］. Key Engineering Materials, 2007, 340341: 277282.

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