岩石介质中地铁列车运行引起的环境振动响应研究

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Abstract The visco-elastic artificial boundary was analyzed to be suitable for the layer rock. Taking the Qingdao metro line #3 as the studying subject，the computation model was constructed to study the effects of rock elastic modulus，tunnel depth as well as tunnel lining thickness on the rock environmental vibration response induced by the metro train. The results show that the variations of rock elastic modulus at different depths generate different effects on the rock environmental vibration response. There is only one amplification zone of vertical acceleration at the free surface of rock environment with great elastic modulus，where the acceleration amplification zone is at the tunnel upward of free surface. The vibration effects of metro trains on free surface increase with the decrease of tunnel depth. The tunnel lining thickness has few effects on the rock environmental vibration response induced by the metro train.

Key words： rock mechanics metro train train vibration environmental vibration response rock media

Received: 24 February 2011

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http://www.rockmech.org/EN/Y2011/V30/IS1/3341

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