上土下岩地层中平面SH波的传播特性分析

周俊 石文革 董玉飞 路世伟 杜国锋 刘洪宇

周俊, 石文革, 董玉飞, 路世伟, 杜国锋, 刘洪宇. 上土下岩地层中平面SH波的传播特性分析[J]. 高压物理学报. doi: 10.11858/gywlxb.20220564
引用本文: 周俊, 石文革, 董玉飞, 路世伟, 杜国锋, 刘洪宇. 上土下岩地层中平面SH波的传播特性分析[J]. 高压物理学报. doi: 10.11858/gywlxb.20220564
ZHOU Jun, SHI Wenge, DONG Yufei, LU Shiwei, DU Guofeng, LIU Hongyu. Analysis of Propagation Characteristics of SH Waves in Upper Soil and Lower Rock Strata[J]. Chinese Journal of High Pressure Physics. doi: 10.11858/gywlxb.20220564
Citation: ZHOU Jun, SHI Wenge, DONG Yufei, LU Shiwei, DU Guofeng, LIU Hongyu. Analysis of Propagation Characteristics of SH Waves in Upper Soil and Lower Rock Strata[J]. Chinese Journal of High Pressure Physics. doi: 10.11858/gywlxb.20220564

上土下岩地层中平面SH波的传播特性分析

doi: 10.11858/gywlxb.20220564
基金项目: 国家自然科学基金(41972286);湖北省自然科学基金(2019CFB224);湖北省教育厅科学研究计划项目(Q201913308);荆州市科技计划项目(2019Z18001)
详细信息
    作者简介:

    周 俊(1971-),男,学士,高级工程师,主要从事市政及地下工程研究. E-mail:415655148@qq.com

    通讯作者:

    路世伟(1989-),男,博士,副教授,主要从事爆破工程研究. E-mail:lushiwei364@163.com

  • 中图分类号: O382; O521.9

Analysis of Propagation Characteristics of SH Waves in Upper Soil and Lower Rock Strata

  • 摘要: 为研究爆破地震波在层状地层的传播规律,选取平面SH(水平剪切)波作为研究对象,基于弹性波动理论,建立了一般层状地层的刚度矩阵和动力平衡方程,分析了土层与基岩的阻抗比、土层厚度、入射波频率和入射波角度对地表速度与土岩地层界面速度的比值(|u1/u2|)的影响。结果表明:|u1/u2|的各个峰值随着入射波频率的增大而减小,且第2个峰值明显小于第1个峰值,实际工程中应重点关注土层的一阶卓越频率;随着土层阻抗的增大,高频部分的响应越来越强烈,且受入射角的影响也越来越大;当土层较薄时,|u1/u2|高频部分的响应比较明显,但随着土层厚度增加,高频部分的响应越来越小,说明土层的高频滤波作用随着厚度的增加而增强。

     

  • 图  层状地层的局部坐标系

    Figure  1.  Local coordinate system for a stratified stratum

    图  半无限基岩上层状地层示意图

    Figure  2.  Schematic diagram of stratified strata on semi-infinite bedrocks

    图  总刚度矩阵组装过程

    Figure  3.  Assembly process of total stiffness matrix

    图  上土下岩地层示意图

    Figure  4.  Schematic diagram of the upper soil and lower rock stratigraphy

    图  不同阻抗条件下入射角对$ {\text{|}}{u_1}{\text{/}}{u_2}{\text{|}} $-f曲线的影响

    Figure  5.  Influence of incident angles on the $ {\text{|}}{u_1}{\text{/}}{u_2}{\text{|}} $-f curves under different impedances

    图  Z=0.19时不同厚度土层下入射角对 $ {\text{|}}{u_1}{\text{/}}{u_2}{\text{|}} $-f 曲线的影响

    Figure  6.  Effects of incident angle on the $ {\text{|}}{u_1}{\text{/}}{u_2}{\text{|}} $-f curves under different thicknesses of soil layers when Z=0.19

    图  Z=0.70时不同厚度土层下入射角对 $ {\text{|}}{u_1}{\text{/}}{u_2}{\text{|}} $-f 曲线的影响

    Figure  7.  Effects of incident angle on the $ \left| {{u_1}{\text{/}}{u_2}} \right| $-f curves under different thicknesses of soil layers when Z=0.70

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出版历程
  • 收稿日期:  2022-04-11
  • 修回日期:  2022-06-14
  • 网络出版日期:  2022-09-27

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