›› 2006, Vol. 27 ›› Issue (S1): 22-26.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Numerical analysis of construction scheme of loess tunnel

NI Yu-shan, ZHANG Hua-bing   

  1. Department of Mechanics and Engineering Science, Fudan University, Shanghai 200433, China
  • Received:2006-07-20 Published:2006-12-15

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Abstract: The variations of five mechanical conditions such as the surface settlements, the displacement at vault of tunnels, the distribution of plastic zone of surrounding loess, the moment distribution of lining element and the total strain energy of surrounding loess are studied under three kinds of lining procedure with two different tunnel constructions, which is sequential excavation with a central heading and with a lateral heading. The results show that the sequential excavation with a lateral heading, which can decrease the amount of displacement at the vault of tunnels and of the maximal surface settlement and of the plastic zone of surrounding loess, is more preferable than that with a central heading. The tunnel lining in delayed construction compared with that in immediate construction is more favorable to enhance the stability of loess tunnel. It is shown that the analytical results are helpful for the design and construction of loess tunnels.

Key words: loess tunnel, design and construction, excavation, simulation

CLC Number: 

  • TU 457
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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