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Abstract

The underground pit courtyard tunnel of the southward relocation project on National Trunk Way 310 was delayed by 258 m from the left line due to the influence of terrain and geology during the construction stage. The 8# transverse pedestrian passageway was changed to a transverse carriage passageway, and a working face was added to the main tunnel of the right line to ensure timely completion of the project. This paper first discussed the risks and existing problems of propping construction, and then elaborated on the construction process and support parameters of the transverse propping of the underground pit courtyard tunnels from several aspects, including strengthening the transverse carriage tunnel at the intersection, propping of the guide tunnel in the main tunnel, and construction of the three-bench construction method in the main tunnel. Furthermore, the key points of the construction process were discussed.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.042

First Page

267

Last Page

272

Submission Date

March 2025

Reference

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