Study on Interaction between Soil and U-Shaped Subway Tunnel in the Environment of Ground Fissures

Abstract:

The interaction mechanism, between soil and U-shaped Subway tunnel, is studied by numerical simulation in the environment of ground fissures. The Subway Line 2 through the ground fissures in Xi’an. The analysis results show that the soil mass influenced by the relative displacement and the vertical displacement gradually increases with the relative displacement increasing of ground fissures movement. The deformation area of tunnel lies in the two sides of presupposed ground fissure, and the area enlarge with vertical relative displacement increasing. The tunnel structure damages at the ground fissures when the relative displacement reaches to 100mm. The footwall part is in tension and the hanging wall part is under pressure on the top of tunnel structure at the ground fissure. The footwall part is under pressure and the hanging wall part is in tension on the bottom of tunnel structure at the ground fissure. In the practical projects, the sectional type tunnel should be employed when the Subway tunnel through the ground fissures.

• Periodical: Advanced Materials Research (Volumes 250-253)
• Pages: 2342-2345
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.250-253.2342
• Online since: May 2011
• Authors: Yang Liu, Kai Ling Li, Yu Ming Men, Guang Yuan Weng, Hong Jia Liu
• Keywords: Ground Fissure, Interaction Mechanism, Relative Displacement, U-Shaped Subway Tunnel

References

[1] Huang Q B, Pend J B, Fan W. ESTIMATION OF THE MAXIMUM DISPLACEMENT OF GROUND FISSURES ALONG XI'AN SUBWAY LINE 2 AND ITS ENGINEERING CLASSIFICATION [J], Journal of Engineering Geology, 2007, 15 (4): 469-474.

[2] Huang Q B, Pend J B, Men Y M, etal. MODEL TEST STUDY ON EFFECT OF GROUND FISSURE ON OPEN-CUT SUBWAY TUNNEL WITH INTEGRAL LINING[J], Chinese Journal of Rock Mechanics and Engineering, 2008, 27（11）: 2324-2331.

[3] Li K L, ZHang Y, Liu N N. MODEL TEST OF SOIL-SUBWAY TUNNEL DYNAMIC INTERACTION [J], Journal of Engineering Geology, 2007, 15 (4): 534-538

[4] Huang Q B, Peng J B, Shi Y L, etal. Experimental study on effect of active ground fissures on stress and displacement change laws of strata near Subway tunnels[J]. Chinese Journal of Geotechnical Engineering, 2009, 31（10）: 1525-1532.

[5] Liu N N, Men Y M, Peng J B. Dynamic response of shield Subway tunnel in earthquake load[J]. Hydrogeology & Engineering Geology, 2010, 37 （4）: 58-62.

[6] Fan W, Xiong W, Peng J B. Model tests on segmental subway tunnel crossing ground fissure belt[J]. Chinese Journal of Geotechnical Engineering, 2010, 32 （1）: 138-143.