中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2007, Vol. 26 ›› Issue (6): 123-126.

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反射波初至时刻判断中的信号对比法

许年春1,石东虹2,张秋2   

  1. 1.重庆大学土木工程学院,重庆 400045;2.重庆市勘测院,重庆 400020
  • 收稿日期:2007-03-08 修回日期:2007-06-11 出版日期:2007-12-15 发布日期:2015-01-22
  • 作者简介:许年春(1977—),男,安徽安庆人,博士研究生,主要研究方向为岩土工程.E-mail:xxj101294@sina.com
  • 基金资助:
    教育部重点科技项目(03113)

Method of Signal Comparison Used to Judge Arriving Time for Reflected Wave

XU Nian-chun1,SHI Dong-hong2,ZHANG Qiu2   

  1. 1.College of Civil Engineering,Chongqing University,Chongqing 400045,China; 2.Chongqing Survey Institute,Chongqing 400020,China
  • Received:2007-03-08 Revised:2007-06-11 Online:2007-12-15 Published:2015-01-22

摘要: 在地表波动测试中,若不考虑上部岩层不均匀性,与发射点距离相等的测点上测得的振动信号理应吻合,而当 某测点最先有节理面反射纵波传播至时,其振动信号就与其它测点振动信号发生偏离,故可通过信号对比判断出该 测点处节理反射波初至时刻,该方法应用于实测信号,判断出的节理反射波初至时刻误差<1%.

关键词: 信号对比, 反射波, 初至时刻, 节理产状, 应力波反演

Abstract: If the upper rock is considered homogeneity,the vibration signals tested on equal-offset spots is theoretically same in ground wave test.When the wave reflected by the joint reaches one spot firstly,the vibration signal on this spot will depart from others.So we can judge the initial arriving moment for reflected wave through signal comparison.This method was used to signals tested in one experiment indoors,and the initial arriving moment was close to the theoretic value.

Key words: signal comparison, reflected wave, initial arriving moment, joint attitude, stress wave inverse

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