Abstract
In the process of urban subway shield construction, how to ensure the safety of the newly built tunnel and surrounding buildings is the key issue in the construction. Aiming at the overlapping shield tunneling in soft soil layer, this paper takes overlapped shield tunneling using the overlapping shield tunneling method in a subway section of Kunming Line 6 as the research object, and uses the finite element software ABAQUS to simulate the overlapping shield tunneling. The results are compared with the monitoring data of site construction. The results show that the construction sequence of constructing the lower tunnel first and then the upper tunnel and the condition of grouting and strengthening the soil around the overlapping tunnels can control the settlement of the ground to a large extent.
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