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Abstract

To explore the collaborative deformation and interaction mechanism between two existing lines during tunnel crossing, this paper built a three-dimensional numerical model simulating the entire crossing process based on a water-conveyance tunnel crossing an existing subway section in Shenzhen. Based on actual measured data, it verified the effectiveness of the model and discussed the soil-structure interaction mechanism between two existing lines. The results show that there is a collaborative deformation effect between two existing lines, and crossing two lines is an unfavorable situation compared to crossing a single line. The influence of the upgoing line on the downgoing line after crossing is relatively little, mainly during the crossing period. The downgoing line that is crossed first has a significant effect on the upgoing line, and affects the entire process of crossing the upgoing line. Compared with crossing a single line, crossing two lines also has a significant influence on the deformation trend and surface sedimentation of existing tunnels.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.039

First Page

247

Last Page

252

Submission Date

March 2025

Reference

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