| With the quickly development and utilization of underground space, the anti-seismic performance of underground constructions is being paying close attention to increasingly. It has strategic meaning that how to assuring the tunnel working well during earthquake. In this paper the summary of worldwide typical instances of tunnels behavior during earthquake and research developments & methods is briefly described, the characteristics regarding the tunnel damages during earthquake and classification are summed up, the damage mechanism of action from earthquake is described too. Based on the data of Zhegushan tunnel which is situated on the north-east of West Sichuan plateau, the transient dynamic method of ANSYS compute software is used to study the mutual action principles of variety surrounding rock & tunnel construction systems, Such as the different lining material, different lining thickness, different earthquake intensity, the tunnel section where the area change sharply. etc., Results of the analysis reflects that SFRC and steel concrete are both good lining materials with high-practicability. There is a best lining thickness harmonizes the different changes of lining during earthquake. The less the shapes of the section, the better the performance of anti-seismic. It is positive to tunnel if build the invert arch in time. Discrimination shall be taken to double-arch tunnel as its two holes have difference performance during earthquake. The NATM principle shall be required to use in technical regulation for its advantage of anti-seismic. The contents of this paper may be used as a reference for formulate and modify earthquake resistant regulation, design and construction of tunnel.
|
PDF Full Text Request