为探究超大直径盾构近距离侧穿既有桩基施工过程中的变形控制策略，依托济南市济泺路穿黄隧道超大直径盾构近接穿越临堤桩基工程，结合现场监测数据及施工参数，建立精细化数值模型，对盾构施工过程进行模拟，研究邻近大堤对近接穿越过程中桩基反应的影响； 通过对比不同施工参数下所采取加固措施的应用效果，分析隔离桩+高压旋喷桩加固+钢花管预注浆加固的综合加固方案在不同施工条件下的适应性。结果表明： 1）邻近大堤会导致先行线侧穿后的墩台倾斜度增大，但在特定的施工条件下，此影响存在一定的时效性； 2）在施工参数得到较好控制的前提下，采取相应措施加固桩体能较好地抑制早期土体扰动对于近接桩基的影响，但所采取加固措施的最终应用效果有限； 3）采用不同加固方案在控制近接桩基横向水平位移方面的差异较纵向明显； 4）泥水压力对所采取加固措施应用效果的影响较为显著，注浆压力在此方面的影响则十分有限。

 To investigate the deformation control strategy of a superlargediameter shield laterally crossing existing pile foundation at a short distance, a case study is conducted on the Jiluo road Yellow river tunnel in Jinan, China, a refined numerical model is developed to simulate the shield tunneling process based on onsite monitoring data and construction parameters and the impact of adjacent embankment on the pile foundation response during the process of the shield tunneling. Furthermore, the application effects of reinforcement measures under various construction parameters are comparatively analyzed and the adaptability of the comprehensive reinforcement measures of isolation pile strengthening + highpressure jet grouting pile reinforcement + pregrouting reinforcement using steel flower tube under various construction conditions is investigated. The results show the following: (1) The adjacent embankment will raise the slope of the pier platform after laterally crossing the early driven tunnel, and this effect will occur at a certain time under specific construction conditions. (2) On the premise that the construction parameters are well controlled, adopting corresponding measures to strengthen the pile can better restrict the influence of early soil disturbance on the pile foundation; however, the final application effect of the reinforcement measures is limited. (3) The variance of different reinforcement measures in controlling the transverse horizontal displacement of pile foundation is more obvious than that in the longitudinal direction. (4) The influence of slurry pressure on the application of the reinforcement measures is considerable, while the effect of grouting pressure is very limited in this respect.