Canadian Geotechnical Journal, Ahead of Print.
When tunnelling poses excessive risks for buildings and buried foundations, a pile row barrier may shield the existing structure from ground movements. This paper presents a three-dimensional linear elastic prediction method to evaluate the protective action of pile walls against surface and subsurface ground movements due to new tunnels, both directly behind the wall as well as within the entire ground. Analyses are carried out to evaluate the vertical and horizontal movements of the ground and the pile wall as the result of soil–pile row interaction. New factors that quantify the wall efficiency in reducing settlements and deflections behind the wall are proposed; the results indicate that the effectiveness of the pile wall at reducing horizontal displacements is limited. Subsequently, predictions are compared against field and numerical data to demonstrate that the elastic solution is applicable, particularly for small ground losses. Finally, the barrier efficiency in reducing settlements is discussed comparing pile walls and diaphragm walls.

中文翻译：

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使用桩墙保护地表和埋地结构免受隧道掘进：预测模型

加拿大岩土工程杂志，提前印刷。
当隧道对建筑物和埋地基础构成过度风险时，桩排屏障可以保护现有结构免受地面运动的影响。本文提出了一种三维线弹性预测方法，以评估桩墙对新隧道引起的地表和地下地表运动的保护作用，无论是直接在墙后还是在整个地面内。进行分析以评估由于土 - 桩行相互作用而导致的地面和桩墙的垂直和水平移动。提出了量化墙效率以减少墙后沉降和挠度的新因素；结果表明，桩墙在减少水平位移方面的效果是有限的。随后，将预测与现场和数值数据进行比较，以证明弹性解决方案是适用的，特别是对于小的地面损失。最后，通过比较桩墙和连续墙讨论了减少沉降的屏障效率。