天桥桩基扰动对其安全性影响分析

Analysis on the influence of overpass pile foundation perturbation upon the safety

以西安地铁一号线某区间隧道工程为背景,通过建立FLAC数值模型,计算了盾构机旁穿天桥桩基时,桩基扰动对天桥的安全性影响,并建议了施工措施,监测结果表明,措施有效,保证了天桥的安全。

Taking the sectional tunnel engineering of Xi＇ an subway line No. 1 as the background, through establishing FLAC numerical model, the paper calculates the safety impact of pile foundation perturbation upon the overpass safety while the shielding machine crosses overpass pile foundation, and puts forward construction measures. Supervision results show that the measures are effective and guarantee the safety of the over- pass.