Model Test of the Impact of Active Ground Fissures on Metro Tunnel

Abstract:

A model test was performed to investigate the impact of active ground fissure on metro tunnel. The test results show that under the action of active ground fissure, the metro tunnel behaviors as a cantilever elastic foundation beam, and the top is in tension and its bottom is in compression. The tensile parts are located in the foot-wall with the range 0.75～2.33D（D is tunnel diameter） distance from active ground fissure and the compressive parts are mainly located in the foot-wall with the range 3D distance from the fissure. When the settlement of hanging wall of ground fissure reaches 1cm（25cm in prototype）, the tunnel bottom appear cavity in the hanging wall and cracks in the foot-wall. With the settlement development of the hanging wall of active ground fissure the vertical soil pressure on the top of tunnel greatly increases and reduces at the bottom of tunnel in the hanging wall.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 1334-1339
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.1334
• Online since: September 2013
• Authors: Yi Yuan*, Qiang Bing Huang, Jie Han, Ming Li Li
• Keywords: Active Ground Fissure, Metro Tunnel, Model Test, Soil Pressure, Strain of Lining

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