本文以厦门地铁1号线园博苑站~杏锦路站区间隧道盾构侧穿杏林北环高架桥工程为依托，采用理论分析、数值模拟和现场监测相结合的方法开展论文的研究工作，并提出相应的桥桩基础变形防控技术方案。 （1）在原有理论基础上，分析了各类因素对地铁隧道施工引起地层变形的影响。研究表明，地铁盾构施工引起的地层位移，主要有水平位移和竖向位移，地层不同方向的位移变形，使邻近桥桩基础产生不同形式的变形。总结归出纳了盾构隧道下穿工程中常用的防控措施，同时提出了园博苑站~杏锦路站区间地铁侧穿工程中地层和桥桩的变形防控标准。 （2）运用Midas GTS软件，分析地铁盾构施工引起既有桥桩变形的影响规律。模拟分析袖阀管注浆防护效果。模拟结果表明，袖阀管注浆加固措施下的地层沉降和桥桩变形都明显减小，袖阀管注浆防护效果明显。分别模拟采用17.7m、20.7m、23.7m三种长度袖阀管对土层进行注浆加固，对比分析邻近桥桩变形情况，并进行防护参数比选。综合对比各种因素分析得出23.7m长度袖阀管注浆加固更为合理。 （3）结合工程实际，制定现场防控监测方案，对比分析模拟预测和现场监测结果。研究表明，模拟预测的地表沉降和现场实测地表沉降曲线趋势基本一致，袖阀管注浆加固地层后，地表沉降和邻近的杏林北环高架桥桥桩变形都控制在允许范围内，确保了地铁盾构施工期间桥梁的安全运营。

The research work of the paper is based on the project of Yuan-bo-yuan Station~Xing-jin Road Station of Metro Line One in Xiamen which shield through the Xinglin North Ring viaduct project, carried out the research work by means of theoretical analysis, numerical simulation and field monitoring. It puts forward the corresponding bridge pile foundation deformation prevention and control technology program. (1) Based on the original theory,the influence of various factors on the deformation caused by subway tunnel construction is analyzed. The results show that the displacement of the strata caused by the construction of the subway shield is mainly caused by horizontal displacement and vertical displacement, displacement deformation in different directions of the strata, so that different forms of deformation are produced in the adjacent pile foundation. The paper puts forward the prevention and control measures of the shield tunneling project and the deformation prevention and control standard of the project of side through of the Park Gyeongyuan Station~Xingjin Road Station. (2) Using Midas GTS software,the influence law of existing bridge pile deformation caused by shield construction is analyzed. It simulates and analyzes the protection effect of sleeve valve tube grouting. The simulation results show that the settlement of the formation and the deformation of the bridge pile are greatly reduced under the grouting reinforcement of the sleeve valve pipe, and the effect of the grouting pipe is obvious. The geogrids of 17.7m, 20.7m and 23.7m length were used to simulate the soil layer, and the deformation of adjacent bridge piles was analyzed and compared. It concludes that 23.7m sleeve valve grouting reinforcement is more reasonable by comprehensive analysis of various factors. (3) Combined with the actual project, it develops the on-site construction deformation prevention and control monitoring program and analyzes the results of comparative prediction results and on-site monitoring. The results show that the ground subsidence of the simulated and predicted ground subsidence curve is basically same. After the casing pipe grouting and strengthening the formation, the surface subsidence and the deformation of the adjacent Xinglin Beihuan viaduct bridge are controlled within the allowable range. It ensures safety of the bridge during the construction of subway shield.