Analysis of Dalian Subway Tunnel Shield Construction Impact with Engineering Materials and Engineering Mechanics on Existing Bridge Pier

Abstract:

In the 202 section of subway shield Dalian interval in close proximity to existing bridge as the basis, the surface settlement and bridge pier settlement observation station are established. By the 62 day of the crossing construction monitoring, the monitoring data are analyzed in detail. When surface subsidence induced by shield tunnel construction, above the measuring point start speed is faster than settling startup speed measuring points on both sides, about 2-2.5 times, subsidence range higher about 8 to 10 m ahead of time. Away from the pier side first started, and start faster than the side near the pier ,is about 1.2 times , settlement of shield construction are mainly concentrated in the distance before and after the excavation of shield machine 10 m, accounting for 80.72%-81.6% of the total settlement . At highest risk for shield construction area, we should strengthen monitoring and make contingency plans in a timely manner.

• Periodical: Advanced Materials Research (Volume 848)
• Pages: 96-99
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.848.96
• Online since: November 2013
• Authors: Jin Kui Li, Qing Hao Hou, Wen Jing Liang
• Keywords: Existing Bridge, Pier Settlement, Shield Construction, Surface Subsidence

References

[1] yongmao Hou etc. the site monitoring study of large diameter earth pressure balance shield construction impact on environmental. Rock Mechanics, 2013 (01): PP. 235-242.

[2] Jinkui Li, Fei Sun , CRD Shallow Cross -Channel Construction Method of Subsidence Monitoring and Analysis under Artificial Plain Fill. Modern Tunneling Technology, 2012 (01): PP. 148-151.

[3] Hui ren Bai, Jinkui Li, FeiFei Wang, analysis of subsidence with shallow subway tunnel construction. Journal of Wuhan Institute of Technology, 2012 (10): 58-61.