论文标题：Ground penetrating radar detection of steel fiber reinforced composite linings in shield tunnels: Experimental and field studies

期刊：Frontiers of Structural and Civil Engineering

作者：Kang LI, Xiongyao XIE, Hao CHEN, Biao ZHOU, Changfu HUANG

发表时间：08 Dec 2024

DOI：10.1007/s11709-025-1165-8

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文章亮点/Highlights

钢纤维增强混凝土-钢筋混凝土（SFRC-RC）复合衬砌因其优异的强度和防水性能，在盾构隧道施工中得到广泛应用。无损检测方法对于评估衬砌质量和确保隧道施工安全至关重要。

本研究以新加坡深层隧道污水处理系统二期工程为案例，探讨了地质雷达（GPR）检测复合衬砌的潜力及参数优化。研究利用gprMax软件进行模拟，通过引入钢纤维增强混凝土（SFRC）的随机分布特征及精确材料参数，开展了雷达频率选择的系统性研究。模型试验严格遵循实际隧道工程的结构参数设置，重点分析了不同中心频率（100MHz-1.5GHz）下地质雷达的电磁波穿透特性。研究团队同步开展了现场实测工作，获取了真实工况下的地质雷达探测数据，验证了模拟和模型试验的结论可靠性，并研究了地质雷达信号的功率衰减模式。

结果表明，地质雷达技术可有效实现复合衬砌结构的无损检测与质量评估。检测SFRC-RC复合衬砌的最佳频率为300 MHz，该频率能够清晰分辨不同介质层的界面特征。通过建立单参数指数函数与幂函数的拟合模型，研究提出了定量表征地质雷达信号在SFRC-RC复合衬砌中衰减特性的经验公式。本文为SFRC-RC复合衬砌的地质雷达检测提供了有价值的参考。

SFRC-RC复合衬砌探地雷达检测研究路线

摘要/Abstract

Steel fiber reinforced concrete-reinforced concrete (SFRC-RC) composite linings are popular in shield tunnel construction due to exceptional strength and waterproofing properties. Non-destructive testing methods are essential for assessing the quality of these linings and ensuring tunnel construction safety. This study investigates the potential and parameters of ground penetrating radar (GPR) detection for the composite linings, using the Deep Tunnel Sewerage System-Phase 2 project in Singapore as a case study. The gprMax simulations incorporated the random distribution and precise parameters of steel fibers to conduct preliminary frequency selection studies. The structural setup of the model experiments mirrored that of the actual tunnel, allowing for an analysis of GPR penetration capabilities at various frequencies. Field testing provided authentic GPR data, validating conclusions drawn from simulations and model experiments and examining GPR power attenuation patterns. Findings indicate that GPR is effective for the quality detection of composite linings. The optimal frequency for detecting SFRC-RC composite linings is 300 MHz, which resolves the interfaces of different layered media. Based on single-parameter exponential and power function fitting, empirical formulas for power attenuation quantitatively characterize GPR signal attenuation in SFRC-RC composite linings. This paper offers valuable references for GPR detection of SFRC-RC composite linings.

关键词/Keywords

shield tunnel; steel fiber reinforced concrete; composite lining; ground penetrating radar; model experiment; field test

引用信息/Citation Information

Kang LI, Xiongyao XIE, Hao CHEN, Biao ZHOU, Changfu HUANG. Ground penetrating radar detection of steel fiber reinforced composite linings in shield tunnels: Experimental and field studies. Front. Struct. Civ. Eng., 2025, 19(4): 541–555 https://doi.org/10.1007/s11709-025-1165-8

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https://doi.org/10.1007/s11709-025-1165-8

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