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Geomechanics and Engineering
  Volume 12, Number 2, February 2017, pages 185-195
DOI: http://dx.doi.org/10.12989/gae.2017.12.2.185
 


Prediction methods on tunnel-excavation induced surface settlement around adjacent building
Zhi Ding, Xin-jiang Wei and Gang Wei

 
Abstract
    With the rapid development of urban underground traffic, the study of soil deformation induced by subway tunnel construction and its settlement prediction are gradually of general concern in engineering circles. The law of soil displacement caused by shield tunnel construction of adjacent buildings is analyzed in this paper. The author holds that ground surface settlement based on the Gauss curve or Peck formula induced by tunnel excavation of adjacent buildings is not reasonable. Integrating existing research accomplishments, the paper proposed that surface settlement presents cork distribution curve characters, skewed distribution curve characteristics and normal distribution curve characteristics when the tunnel is respectively under buildings, within the scope of the disturbance and outside the scope of the disturbance. Calculation formulas and parameters on cork distribution curve and skewed distribution curve were put forward. The numerical simulation, experimental comparison and model test analysis show that it is reasonable for surface settlement to present cork distribution curve characters, skewed distribution curve characteristics and normal distribution curve characteristics within a certain range. The research findings can be used to make effective prediction of ground surface settlement caused by tunnel construction of adjacent buildings, and to provide theoretical guidance for the design and shield tunnelling.
 
Key Words
    shield tunnel; adjacent structure; surface settlement; cork distribution; skewed
 
Address
Department of Civil Engineering, Zhejiang University City College, Hangzhou, China.
 

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