This paper presents an isolation pile–soil lateral interaction model that considers not only the relative linear sliding at the pile-soil interface but also the pile group–soil interaction. The model allows for the calculation of the pile–soil interaction force using the elastic continuum method combined with the displacement compatibility relationship at the pile–soil interface, thus enabling the total lateral ground displacement to be obtained. The proposed method is validated by comparisons with the elastic foundation method (EFM) and the boundary element method (BEM). The advantages of the proposed method in calculating the lateral ground deformation resisted by isolation piles are demonstrated. The mechanical mechanism of the isolation pile’s lateral resistance effect on ground deformation can be summarized as follows: the combination of positive and negative resistance effects drives the lateral ground displacements along the depth direction from the original inhomogeneity caused by the tunnel excavation to a relatively homogeneous state. The soil parameters including Poisson’s ratio, internal friction angle and ground volume loss; the isolation pile parameters including the distance of the tunnel axis from the pile axis, the pile length, the buried depth of the pile top and the relative pile bending stiffness; and isolation pile–soil interface parameters including relative pile shaft–soil stiffness and relative pile tip–soil stiffness all exert a significant influence on the lateral resistance effect of the isolation pile. In light of that the resistance effects at different depths below the surface are not uniform, it is of the utmost importance to assess the resistance performance of the isolation pile in accordance with the location and lateral deformation requirements of the protected structure in actual engineering.

中文翻译：

---

埋埋隔振桩对隧道诱发的横向地表运动的阻力影响的理论研究


本文提出了一个隔离桩-土横向相互作用模型，该模型不仅考虑了桩-土界面处的相对线性滑动，还考虑了桩组-土相互作用。该模型允许使用弹性连续介质法结合桩-土界面处的位移相容关系来计算桩-土相互作用力，从而获得总横向地面位移。通过与弹性基础法 （EFM） 和边界元法 （BEM） 的比较验证了所提方法的有效性。证明了所提方法在计算隔离桩抵抗的横向地面变形方面的优势。隔震桩侧向阻力对地表变形影响的力学机制可归纳为：正负阻力作用的结合驱动沿深度方向的侧向地基位移从隧道开挖引起的原始不均匀性发展到相对均匀的状态。土体参数包括泊松比、内摩擦角和地面体积损失;隔振桩参数包括隧道轴线距桩轴线的距离、桩长、桩顶埋深和桩的相对弯曲刚度;隔震桩-土界面参数，包括相对桩轴-土刚度和相对桩尖-土刚度，都对隔震桩的侧向阻力效应产生重大影响。 鉴于地表以下不同深度的抗力效应不均匀，在实际工程中，根据被保护结构的位置和横向变形要求来评估隔振桩的抗力性能至关重要。