This paper describes an analytical method for investigating the tunnel–pile interaction for new tunnels crossing the pile foundation of the Shenzhen Bay Bridge, with a case study using a cavity expansion-based model. The three-dimensional analytical model developed in this study evaluates the ground deformation and pile response induced by the construction of tunnels for the two Metro #13 lines and the Wanghai Road tunnel, and assesses the effectiveness of mitigation measures such as ground stabilisation and isolation walls. The study reveals significant vertical displacement and surface settlement caused by the Wanghai Road tunnel, and horizontal deformation and bending moments in specific pile foundations. The results show that reinforcement measures can effectively control formation deformation disturbance, and metro jet system isolation walls can limit horizontal and vertical displacements caused by excavation. To ensure the safe operation of the Shenzhen Bay Bridge, the study highlights the importance of comprehensively evaluating the safety of shield crossing schemes. The proposed analytical method could also serve as a pre-design tool and reference for optimising tunnel construction, providing valuable guidance for future reinforcement schemes. In general, this study provides significant insights into the tunnel–pile interaction, which will be useful for bridge and tunnel engineering design and construction.

中文翻译：

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新建隧道穿越既有桥梁桩基的分析方法：以实例研究

本文描述了一种研究穿越深圳湾大桥桩基的新隧道隧道-桩相互作用的分析方法，并以基于空腔膨胀的模型进行案例研究。本研究开发的三维分析模型评估了两条地铁13号线和望海路隧道隧道施工引起的地面变形和桩反应，并评估了地面稳定和隔离墙等缓解措施的有效性。研究揭示了望海路隧道引起的显着竖向位移和地表沉降，以及特定桩基的水平变形和弯矩。结果表明，加固措施可以有效控制地层变形扰动，地铁喷射系统隔离墙可以限制开挖引起的水平和竖向位移。为确保深圳湾大桥安全运营，研究凸显了综合评估盾构穿越方案安全性的重要性。所提出的分析方法还可以作为优化隧道施工的预设计工具和参考，为未来的加固方案提供有价值的指导。总的来说，这项研究为隧道与桩的相互作用提供了重要的见解，这对于桥梁和隧道工程的设计和施工很有用。