Abstract: The running tunnel from Qilihe Station to “New Zhengzhou Railway Station” Station on Line 1 of Zhengzhou Metro crosses underneath and in proximity to a large sewage pipeline. The technology of shield boring underneath and in close proximity to the large sewage pipeline is presented. The boring parameters are determined on basis of numerical simulation, trial boring and simulated control before the boring. As guarantee measures, rational monitoring and secondary grouting are applied. In the end, the shields crossed underneath and in close proximity to the large sewage pipeline successfully. As conclusion, proposal is made on the control of the boring parameters for shield crossing underneath and in close proximity to large sewage pipelines. The paper can provide reference for similar projects in the future.

Key words: shield, boring underneath and in close proximity to sewage pipeline, disturbance, ground deformation, secondary grouting