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首页> 外文期刊>KSCE journal of civil engineering >Experimental Investigation of the Deformation and Failure Behavior of a Tunnel Excavated in Mixed Strata Using Transparent Soft Rock
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Experimental Investigation of the Deformation and Failure Behavior of a Tunnel Excavated in Mixed Strata Using Transparent Soft Rock

机译：透明软岩混合地层隧道开挖变形与破坏特性试验研究

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摘要

To investigate the deformation and failure behavior of a tunnel excavated in mixed strata, transparent soft rock test and numerical simulations were performed. The distribution features of displacement and failure and the evolution laws were analyzed. In this study, a transparent material for simulating mixed strata was developed. The visualization of the spatial deformation inside rock masses will improve the understanding of this process. The tests suggest that the mechanical properties of transparent soft rock are similar to those of natural rock. Experiments on the isotropic and mixed strata conditions were carried out to study the deformation rules during tunnel boring machine (TBM) excavation. The test results show that the dominant deformation position and direction exist in isotropic and mixed strata. A shear slip band occurs in both mixed and isotropic strata but with different distributions. Finally, numerical simulations were conducted to study the failure process, and the damage pattern of the transparent soft rock experiment was similar to that of the numerical simulation. The interface of the softness and hardness layers controls the extension of rock damage.
机译：为了研究在混合地层中开挖的隧道的变形和破坏行为，进行了透明软岩试验和数值模拟。分析了位移和破坏的分布特征以及演化规律。在这项研究中，开发了一种模拟混合岩层的透明材料。岩体内部空间变形的可视化将增进对这一过程的理解。测试表明，透明软岩的力学性能与天然岩相似。通过进行各向同性和混合地层条件试验，研究隧道掘进机（TBM）开挖过程中的变形规律。试验结果表明，各向同性和混合地层中存在主变形位置和方向。在混合地层和各向同性地层均存在剪切滑移带，但分布不同。最后，通过数值模拟研究了破坏过程，透明软岩实验的破坏规律与数值模拟相似。柔软度和硬度层的界面控制岩石损伤的扩展。

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