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Assessment of damages in fault rupture-shallow foundation interaction due to the existence of underground structures

机译：浅谈地下结构存在的故障破裂 - 浅层基础互动的评估

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Permanent ground deformations induced by fault movements can be damaging to engineering structures built on or near active faults. Most experimental and numerical studies have so far confirmed the fact that the presence of a tunnel in the vicinity of an active fault can change the zone of large deformations on the ground surface. This paper investigates the effect of tunnel existence on the interaction between a reverse fault and a shallow foundation using the finite element method. This paper also analyzes the manner in which a foundation in faulting zones responds to various parameters such as foundation position, tunnel depth and diameter, and the position of the tunnel relative to the rupture path in free-field condition. The mechanical response of the tunnel lining is also examined. The results show that the existence of a tunnel, in some cases, can increase the foundation rotation. Varying the tunnel diameter did not cause any significant changes in the general pattern of failure and the location of shear planes near the tunnel. However, a tunnel with a larger diameter causes the rupture to deviate and propagate in a wider area of the soil layer. It was found that increasing the tunnel depth extends a branch of the rupture path towards the footwall and expands the shear zone on a wider area. In the end, this paper examines the effectiveness of expanded polystyrene sheet (EPS) walls in mitigating the surface fault rupture and reducing the foundation rotation.
机译：故障运动引起的永久地面变形可能对内置或近主动故障构建的工程结构造成损害。到目前为止，大多数实验性和数值研究证实了，即积极故障附近的隧道存在的事实可以改变地面上的大变形区域。本文研究了隧道存在对使用有限元法的反向断层与浅基础相互作用的影响。本文还分析了故障区基础的方式响应诸如基础位置，隧道深度和直径的各种参数，以及隧道相对于自由场条件的破裂路径的位置。还检查了隧道衬里的机械响应。结果表明，在某些情况下，隧道的存在可以增加基础旋转。隧道直径不同没有引起隧道附近的普通失效模式的任何显着变化和隧道附近的剪切平面的位置。然而，具有较大直径的隧道导致破裂偏离并在土壤层的更宽区域中偏离和传播。结果发现，增加隧道深度将破裂路径的分支延伸到脚鞋上，并将剪切区域扩展到更广泛的区域上。最后，本文研究了膨胀的聚苯乙烯片（EPS）壁在减轻表面故障破裂并降低基础旋转时的有效性。

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