结合北京市南水北调重要的配套项目通州支线工程,以混凝土管下穿京哈高速公路工程为实例,从施工环境特点与顶管机械选型进行分析,采取控制土仓压力、土体流塑化改造、加强路面监测控制等技术措施,降低施工时对高速公路变形的影响,顺利完成下穿施工任务,为类似工程提供了成功经验。 Combined with the project of Tongzhou branch, an important ancillary project of Beijing South-to-North Water Diversion Project, taking the concrete pipe passing through Jingha Expressway as an example, the paper analyzes the characteristics of construction environment and the selection of pipe jacking machinery, , Strengthening the monitoring and control of pavement and other technical measures to reduce the impact on the highway deformation during construction and successfully completed the construction tasks under the pass and provided successful experiences for similar projects.