Study on Surrounding Rock Deformation Discipline of Extra-Large Section Super-Shallow-Buried Tunnel

Abstract:

The type B section of Hongqihegou station is cross section and its excavation section area is about 730 m2. This section is located in rail transit line 3 at the center of Chongqing. For this reason, the heavy traffic, large amount buildings and pipelines surrounding, super-shallow-buried depth and small cross-cover ratio (only 0.4) become the determinant factor in tunnel construction. By using a new method—the up-down sidewall drift method combined with first-wall-and-then-arch method, the Hongqihegou station was successfully completed. Through the analysis of the monitoring measurement data, the discipline of surrounding rock deformation during construction is revealed.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 2318-2322
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.2318
• Online since: September 2011
• Authors: Ming Li Huang, Ke Zhi Chen, Zhong Sheng Tan, Jian Qiang Zhang
• Keywords: Extra-Large Section, First-Wall-and-then-Arch Method, Monitoring Measurement, Super-Shallow-Buried, Up-down Sidewall Drift Method

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