可控振源作用下Rayleigh波相速度提取方法研究  

Research on extraction of Rayleigh wave phase velocity by surface shaker

作　　者：董连成[1,2] 胡新福[1] 李广影[1] 陶夏新[3] 黄学欣[1] 

机构地区：[1]黑龙江科技学院建筑工程学院,黑龙江哈尔滨150027 [2]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000 [3]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150080

出　　处：《世界地震工程》2013年第2期32-38,共7页World Earthquake Engineering

基　　金：国家自然科学基金(50978080);中国科学院冻土工程国家重点实验室开放基金课题(SKLFSE201103);黑龙江省自然科学基金项目(E201227);黑龙江省教育厅科学技术研究面上项目(12511486;11551442);黑龙江科技学院青年才俊培养计划资助

摘　　要：Rayleigh波探测方法的研究与应用已越来越广泛,针对稳态法Rayleigh波相速度提取方法的缺点,从地脉动台阵的观测出发,发展了一种地表可控振源作用下的新的Rayleigh波相速度提取方法——改进的空间自相关方法,节省了观测时拾振器的使用数量。对实际场地进行了可控振源及地脉动台阵的观测,应用所建议的方法从实际可控振源观测记录中提取了Rayleigh波相速度,与应用传统方法从地脉动台阵观测记录及有限元模拟的记录中提取的结果进行了对比,验证了所提方法的实用性,克服了传统提取方法的缺点,为下一步Rayleigh波相速度的应用奠定基础。The Rayleigh wave exploration method has been researched and applied widely, in order to overcome shortcoming in extracting steady state Rayleigh wave phase velocity, the new method for extracting Rayleigh wave phase velocity by surface shaker was proposed, that is the improved spatial autocorrelation method, the vibration pickups can be reduced for observation. In order to verified the method improved, the Rayleigh wave phase velociies were extracted from records observed from two practical engineering sites and compared with those extracted from traditional microtremors array records and simulated records by finite elements method. Results show that the improved spatial autocorrelation method is better than usually extracted method, and the Rayleigh wave phase velocity extracted by improved method can be used as objective function for engineering site velocity structure inversion.

关 键 词：Rayleigh波相速度 改进的空间自相关方法 可控振源 目标函数 

分 类 号：TU378[建筑科学—结构工程]