›› 2010, Vol. 31 ›› Issue (7): 2179-2187.

• Geotechnical Engineering • Previous Articles     Next Articles

Dynamical analysis model for frozen embankment and seismic hazard assessment of Qinghai-Tibet Railway

LI Shuang-yang1, ZHANG Shu-juan1, ZHAO De-an2, YANG Yu-gui1   

  1. 1. State Key Laboratory of Frozen Soil Engineering, CAREERI, Chinese Academy of Sciences, Lanzhou 730000, China; 2. School of Civil Engineering, Northwest University for Nationalities, Lanzhou 730030, China
  • Received:2009-01-07 Online:2010-07-10 Published:2010-07-19

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Abstract:

Based on lots of experimental studies, a moisture, thermal and dynamic coupled model for frozen embankment is deduced by using fundamental principles of physics of frozen soil, mechanics of frozen soil, numerical heat transfer, advanced soil mechanics and soil dynamics; and then, its corresponding numerical program is written. Lastly, taking a typical section of Qinghai-Tibet Railway for example, the seismic response of frozen embankment is analyzed in detail; and safety stability of the embankment is assessed under the EI Centro earthquake loading. By this study, it is found that the dynamical model for frozen embankment proposed is reasonable and can well simulate the seismic problem of frozen embankment. In addition, the Qinghai-Tibet Railway will not be destroyed heavily under the seismic loading, of which the intensity is less than design value; and it can be immediately put into operation after simple repair.

Key words: permafrost region, embankment, temperature field, dynamical analysis, seismic response

CLC Number: 

  • TU 445
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