Geomechanics and Engineering

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Grouting effects evaluation of water-rich faults and its engineering application in Qingdao Jiaozhou Bay Subsea Tunnel, China

  • Zhang, Jian (Geotechnical and Structural Engineering Research Center, Shandong University) ;
  • Li, Shucai (Geotechnical and Structural Engineering Research Center, Shandong University) ;
  • Li, Liping (Geotechnical and Structural Engineering Research Center, Shandong University) ;
  • Zhang, Qianqing (Geotechnical and Structural Engineering Research Center, Shandong University) ;
  • Xu, Zhenhao (Geotechnical and Structural Engineering Research Center, Shandong University) ;
  • Wu, Jing (Geotechnical and Structural Engineering Research Center, Shandong University) ;
  • He, Peng (Geotechnical and Structural Engineering Research Center, Shandong University)
  • Received : 2015.12.15
  • Accepted : 2016.09.10
  • Published : 2017.01.25
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Abstract

In order to evaluate the grouting effects of water-rich fault in tunnels systematically, a feasible and scientific method is introduced based on the extension theory. First, eight main influencing factors are chosen as evaluation indexes by analyzing the changes of permeability, mechanical properties and deformation of surrounding rocks. The model of evaluating grouting effects based on the extension theory is established following this. According to four quality grades of grouting effects, normalization of evaluation indexes is carried out, aiming to meet the requirement of extension theory on data format. The index weight is allocated by adopting the entropy method. Finally, the model is applied to the grouting effects evaluation in water-rich fault F4-4 of Qingdao Jiaozhou Bay Subsea Tunnel, China. The evaluation results are in good agreement with the test results on the site, which shows that the evaluation model is feasible in this field, providing a powerful tool for systematically evaluating the grouting effects of water-rich fault in tunnels.

Keywords

Acknowledgement

Supported by : National Basic Research Program of China, National Natural Science Foundation of China

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