Three Dimensional Finite Element Analysis of Subway Shield Tunnel under Exsisting Bridge

Abstract:

One city subway shield tunnel under-passing an existing bridge is analyzed, using the method of the three dimensional finite element analysis to simulate the process of excavating the left and right tunnel to get the data of the subsidence, lateral, stress of the bridge, besides the reaction of the upper structure of the bridge when the shield machine thrusting ahead. The results of the study show that the overall settlement value of the pier is not big, but around piers on both sides, the maximum lateral come to 2.6 mm, and the maximum tension, compression stress of the bridge foundation increased by 1.07MPa and 0.4MPa, and arch structure in construction process stress adverse, it is suggested that we should reinforce the soil around the tunnel treatment to control the bridge foundation of uneven settlement, and at the same time, the process of closely monitor the situation of arch bridge.

• Periodical: Applied Mechanics and Materials (Volume 310)
• Pages: 206-209
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.310.206
• Online since: February 2013
• Authors: Yu Lin Zou, Chuan He, Zheng Zhang, Wei Wang
• Keywords: Finite Element, Metro Shield Tunnel, Shield Thrusting, Under the Existing Bridge

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