Comparative Analysis of the Influence of Different Construction Technology for Excavation on Adjacent Tunnels

Abstract:

Based on the project of a foundation pit engineering adjacent to existing tunnel of Kunming metro line 1, a 3D calculation model is established in consideration the interaction of foundation pit support structures, tunnel structure and soil. In this paper, the authors have simulated the foundation pit excavation process in three conditions, and analyzed the changing laws of the lateral displacement and internal force of the tunnel induced by adjacent excavation under different conditions. Calculation results show that the distributions and the values of the displacement and internal force of the tunnel are obviously different under three different construction technologies, and the “jump dig” is the optimum excavation scheme due to the restriction in the excavation of foundation pit, and the lateral deformation of tunnel structure is smallest in this condition. The conclusion can provide a theoretical basis for similar excavation engineering construction.

• Periodical: Applied Mechanics and Materials (Volumes 638-640)
• Pages: 884-887
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.638-640.884
• Online since: September 2014
• Authors: Yong Gang Du*, Jing Cao, Zu De Ding
• Keywords: Construction Technology, Excavation, Existing Tunnel, Numerical Analysis

References

[1] GAO. G. Y, GAO. M, YAN. C. B, YU. Z. S: Influence of Deep Excavation on Deformation of Operating Metro Tunnels and Countermeasures. Chinese Journal of Geotechnical Engineering(in Chinese), 32(3): 453-459. (2010).

[2] HOU. X. Y, LIU. G. B, HUANG. Y. X. Several Views on the Development of Urban Foundation Work. Construction Technology(in Chinese), 29 (1): 5-7. (2010).

[3] WEI. G, CAI. L. L, ZHAO. C. L. The Review of Influence Research of Excavation Beside the Shield Tunnel. Cryogenic Architectural Technology(in Chinese), (2): 124-127. (2014).

[4] DU. J. L, YANG. M. Influence Analsis of Excavation of Deep Pit on Adjacent Buried Pipelines. Chinese Journal of Rock Mechanics and Engineering(in Chinese), 28: 3015-3020. (2009).

[5] YAO. W. H, LIAO. X. G, MA. H. L, WEI. G. Review of the Impact of Foundation Pit Excavation Passing below Existing Shield Tunnel. Foundation&Structure Engineering(in Chinese), 2(31): 105– 110. (2013).

[6] LIU. J. G, ZENG. Y. W. Application of FLAC3D to Simulation of Foundation Excavation and Support. Rock and Soil Mechanics(in Chinese), 3(27): 505-508. (2006).