城市建筑

本研究以萍乡某明挖隧道工程为背景，针对因采用不同长度抗浮桩及结构差异导致的变形缝两侧差异沉降问题，通过数值模拟方法对抗浮桩布置方案进行优化设计，提出渐变式抗浮桩布置模式。研究结果表明：采用渐变式抗浮桩布置方案可在维持隧道结构弯矩分布基本不变的前提下，显著降低差异沉降量（最大降幅达32%），有效提升结构变形协调性，同时实现抗浮桩材料用量的优化。该研究成果可为类似隧道工程的抗浮设计提供理论依据和工程参考。

This paper takes an open-cut tunnel project in Pingxiang County as the background. Aiming at the problem of differential settlement on both sides of the deformation joint caused by the use of anti-floating piles of different lengths and structural differences, the anti-floating pile layout scheme is optimized and designed through numerical simulation methods, and a gradual anti-floating pile layout mode is proposed. The research results show that the adoption of the progressive anti-floating pile layout scheme can significantly reduce the differential settlement amount(with the maximum reduction reaching 32%) while maintaining the bending moment distribution of the tunnel structure basically unchanged, effectively improve the deformation coordination of the structure, and at the same time achieve the optimization of the material usage of anti-floating piles. The research results can provide theoretical basis and engineering reference for the anti-floating design of similar tunnel projects