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Experimental Research and Numerical Simulation on Grouting Quality of Shield Tunnel Based on Impact Echo Method

机译：基于冲击回波法的盾构隧道注浆质量试验研究与数值模拟

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摘要

To identify shield grouting quality based on impact echo method, an impact echo test of segment-grouting (SG) test piece was carried out to explore effect of acoustic impedance of grouting layers and grouting defects on impact echo law. A finite element numerical simulation on the impact echo process was implemented. Test results and simulation results were compared. Results demonstrated that, under some working conditions, finite element simulation results and test results both agree with theoretical values. The acoustic impedance ratio of SGmaterial influenced the echo characteristics significantly. But thickness frequency could not be detected under some working conditions because the reflected energy is weak. Frequency feature under grouting defects was more complicated than that under no grouting defects.
机译：为了确定基于冲击回波法的盾构灌浆质量，进行了分段灌浆（SG）试件的冲击回波试验，探讨了灌浆层的声阻抗和灌浆缺陷对冲击回波规律的影响。对冲击回波过程进行了有限元数值模拟。比较了测试结果和仿真结果。结果表明，在某些工作条件下，有限元模拟结果和测试结果均与理论值相符。 SGmaterial的声阻抗比显着影响回波特性。但是由于反射能量较弱，在某些工作条件下无法检测到厚度频率。灌浆缺陷下的频率特征要比无灌浆缺陷下的频率特征复杂。

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  • 来源
    《Shock and vibration》 |2016年第7期|1025276.1-1025276.10|共10页
  • 作者

    Yao Fei; Chen Guangyu; Su Jianhong;

  • 作者单位

    Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Coll Civil & Transportat Engn, Nanjing 210098, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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