›› 2010, Vol. 31 ›› Issue (S1): 349-356.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Numerical simulation analysis of influence of blasting construction of foundation trench of immersed tunnel on stability of embankment

ZHANG Yu-cheng 1, 2, 3, YANG Guang-hua 1, 2, JIANG Yan2, YAO Jie1, SHI Yong-sheng2   

  1. 1. School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China; 2. Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China; 3. The Third Chinese Bureau of Construction Wuhan 430070, China
  • Received:2010-04-13 Online:2010-08-10 Published:2010-09-09

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Abstract:

The characteristics of load application and the demands of blasting vibration are analyzed; and the equivalent load application method is proposed based on Saint-Venant principle, that is getting blasting loads equivalent first, then applying the equivalent loads to the line or area of centers of the same blast hole row, in order to simulate blasting load[8]. The results of numerical calculation show that the equivalent method has differences in the vicinity but better fit in further zone. With this equivalent method, the influence of blasting construction of foundation trench of immersed tunnel on the stability of embankment is calculated and analyzed by three-dimensional solid numerical model; the vibratory responses of different positions and different depths are calculated; and based on this, vibration reducing measures are also researched in order to reduce the influence of blasting vibration on existing constructions, so as to provide a reference for similar projects.

Key words: blast, equivalent load, existing foundation trench, stability, simulation blast, equivalent load, existing foundation trench, stability, simulation

CLC Number: 

  • O 241
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