某大直径污水干管受到76根超近距离桥梁桩基的施工影响,管道保护的难度极大。在方案比选的基础上,对传统的套筒跟进方法进行了工艺优化改进,提出了钢套筒法保护污水干管的技术方案,并阐述了其主要工艺要点。现场实施结果与管道监测数据表明,采用钢套筒法对污水干管进行保护是安全、可行的,经验值得推广。 A large diameter of the sewage pipe is subject to the construction of 76 super-long-distance bridge pile foundation, pipe protection is extremely difficult. Based on the comparison and selection of the schemes, the optimization and improvement of the traditional sleeve follow-up method was carried out. The technical scheme of the steel sleeve method for the protection of the sewage main pipe was put forward and the main technical points were described. Field implementation results and pipeline monitoring data show that the use of steel sleeve method of sewage pipe protection is safe and feasible, the experience is worth promoting.