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Analysis of Mechanical Behaviors during Shield Launching Shaft CrossPassage Construction in Soil/Rock Mixed Ground

Publication ,  Journal Article
Wang, Z; Li, L; Wang, G; Zhang, H
Published in: Modern Tunnelling Technology
June 1, 2017

Facing the special "soil/rock" mixed ground condition in the Changchun area, the monitoring data of ground surface settlement and the convergence deformation during cross-passage construction were analyzed, and the settlement and deformation laws were obtained during the construction process using the CRD method. Then, a numerical simulation was conducted using MIDAS/GTS finite-element software to study the settlement, deformation and mechanical behaviors of the support structure and buried pipelines during cross-passage excavation. After a comparison with the measured data, some results were determined: 1) ground surface subsidence induced by the excavation of pilot tunnels 1~4 accounts for 74% of the total settlement; 2) the influence scope caused by tunnel face excavation is around 15 m ahead of and behind the face; 3) the Mises stress in the vault and invert of the primary support structure is high, and the stress concentration emerges at the junction of the primary support structure; and 4) the maximum Mises stress is in the middle of the pipelines with the lowest stress point being about 10 m away from the axis of the pipeline.

Duke Scholars

Published In

Modern Tunnelling Technology

DOI

ISSN

1009-6582

Publication Date

June 1, 2017

Volume

54

Issue

3
 

Citation

APA
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Wang, Z., Li, L., Wang, G., & Zhang, H. (2017). Analysis of Mechanical Behaviors during Shield Launching Shaft CrossPassage Construction in Soil/Rock Mixed Ground. Modern Tunnelling Technology, 54(3). https://doi.org/10.13807/j.cnki.mtt.2017.03.012
Wang, Z., L. Li, G. Wang, and H. Zhang. “Analysis of Mechanical Behaviors during Shield Launching Shaft CrossPassage Construction in Soil/Rock Mixed Ground.” Modern Tunnelling Technology 54, no. 3 (June 1, 2017). https://doi.org/10.13807/j.cnki.mtt.2017.03.012.
Wang Z, Li L, Wang G, Zhang H. Analysis of Mechanical Behaviors during Shield Launching Shaft CrossPassage Construction in Soil/Rock Mixed Ground. Modern Tunnelling Technology. 2017 Jun 1;54(3).
Wang, Z., et al. “Analysis of Mechanical Behaviors during Shield Launching Shaft CrossPassage Construction in Soil/Rock Mixed Ground.” Modern Tunnelling Technology, vol. 54, no. 3, June 2017. Scopus, doi:10.13807/j.cnki.mtt.2017.03.012.
Wang Z, Li L, Wang G, Zhang H. Analysis of Mechanical Behaviors during Shield Launching Shaft CrossPassage Construction in Soil/Rock Mixed Ground. Modern Tunnelling Technology. 2017 Jun 1;54(3).

Published In

Modern Tunnelling Technology

DOI

ISSN

1009-6582

Publication Date

June 1, 2017

Volume

54

Issue

3