CENTRIFUGAL MODEL EXPERIMENT AND NUMERICAL SIMULATION OF IMMERSED TUBE TUNNEL

Yue Xiabing; Xie Yongli; Zhang Hongguang; Hu Zhinan

doi:10.13204/j.gyjz201306018

Volume 43 Issue 6

Dec. 2014

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Yue Xiabing, Xie Yongli, Zhang Hongguang, Hu Zhinan. CENTRIFUGAL MODEL EXPERIMENT AND NUMERICAL SIMULATION OF IMMERSED TUBE TUNNEL[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(6): 84-89. doi: 10.13204/j.gyjz201306018

Citation:

Yue Xiabing, Xie Yongli, Zhang Hongguang, Hu Zhinan. CENTRIFUGAL MODEL EXPERIMENT AND NUMERICAL SIMULATION OF IMMERSED TUBE TUNNEL[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(6): 84-89. doi: 10.13204/j.gyjz201306018

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CENTRIFUGAL MODEL EXPERIMENT AND NUMERICAL SIMULATION OF IMMERSED TUBE TUNNEL

doi: 10.13204/j.gyjz201306018

1.
College of Highway,Chang'an University,Xi'an 710064,China

Received Date: 2012-10-25
Publish Date: 2013-06-20

Abstract

Abstract

Base stress distribution characteristics and the deformation characteristics of immersed tube tunnel in excavation and backfilling process of tunnel engineering occupy an important position.Taking one cross-section of the natural foundation in Hong Kong-Zhuhai-Macao immersed tube tunnel as research object, centrifugal model test and finite element simulation of the whole construction process with different cushion layer thickness were carried out.When excavation rebound and backfilling compression in the immersed tube tunnel, stress distribution and deformation characters of natural foundation, the strain characteristics of immersed tube structure and the influence of cushion layer thickness were revealed, which provided the design basis for the construction of immersed tube tunnel and scheme of ground treatment.The results showed that excavation unloading made basement produce arch distribution rebound.Basal stress distribution was the shape of a saddle after backfill, and only the stress in the middle of base was increasing with time and silting.The strain distribution of immersed tube plate was the shape of a saddle and strain had little change after construction.The thinning of the cushion layer thickness led to a poor smoothing effect on basal stress distribution, and recompression quantity and foundation settlement after construction become large.
- immersed tube tunnel,
- centrifugal model test,
- finite element simulation,
- rebound recompression

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References(14)

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