Journal of Jilin University(Engineering and Technology Edition) ›› 2018, Vol. 48 ›› Issue (5): 1411-1417.doi: 10.13229/j.cnki.jdxbgxb20170331

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Surface subsidence law of double-line shield tunnel based on Peck formula

GONG Ya-feng, WANG Bo, WEI Hai-bin, HE Zi-heng, HE Yu-long, SHEN Yang-fan   

  1. College of Transportation, Jilin University, Changchun 130022,China
  • Received:2017-04-10 Online:2018-09-20 Published:2018-12-11

Abstract: Based on the Peck formula and the double-line superposition principle, the concept of the variation coefficient C of the surface subsidence of double-line shield tunnel is proposed. The shape of the double-line tunnel settlement curve gradually changes from the V-type into W-type, and then into two independent V-types. C=2 and C=7, are respectively the critical points of the “single peak” becoming “double peak”, then becoming two independent “single peaks”. The three-dimensional finite element model was established according to the different influence factors. The effects of different influence factors on the surface subsidence of the double-line shield tunnel were obtained. The measured data of Changchun Metro Line 2 were collected and reliability of the finite element method was verified.

Key words: tunnel engineering, double-line shield, surface subsidence, Peck formula, numerical simulation

CLC Number: 

  • U459.3
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