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Study on Reservoir and Water Inrush Characteristic in Nibashan Tunnel, Sichuan Province, China

  • Sixiang Ling
  • Yong Ren
  • Xiyong WuEmail author
  • Siyuan Zhao
  • Limao Qin
Conference paper

Abstract

The Nibashan tunnel is a major project mountain tunnel on Ya’an to Lugu lake expressway in Sichuan province. The tunnel relative elevation of about 2,100 m and the maximum depth of 1,701 m, belongs to the deep buried and extra-long tunnel. The tunnel’s strata are mainly igneous rock of Suxiong Formation, Lower Sinian. The rock type belongs to rhyolite (69 %), andesite (21 %) and a small amount of pyroclastic rocks, dykes and terrigenous clastic rocks. Based on the field investigation and drilling data of Nibashan tunnel, analysis of igneous rock reservoir space and performance factor by the lithology, lithofacies, fractures, structure and diagenesis of igneous rock. It considered that the igneous rock reservoir water storability was mainly affected by tectonism, and the reservoir site is located in the tectonic fracture zone. Finally, through the high pressure water pressure test and pumping test of drilling on Nibashan tunnel, obtaining the water reservoir and water inrush characteristic of igneous rock and geological flaws in tunnel, and providing a theoretical basis to construct safely and smoothly the tunnel.

Keywords

Nibashan tunnel Igneous rock Reservoir Water inrush characteristic 

Notes

Acknowledgements

This work was supported by research funds awarded by the National Natural Science Foundation of China (Grant No. 41172261) and the Key Technology Research and Development Program of Sichuan Province, China (Grant No. 2012SZ0051).

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Sixiang Ling
    • 1
  • Yong Ren
    • 1
  • Xiyong Wu
    • 1
    • 2
    Email author
  • Siyuan Zhao
    • 1
  • Limao Qin
    • 1
  1. 1.Department of Geological EngineeringSouthwest Jiaotong UniversityChengduPeople’s Republic of China
  2. 2.Key Laboratory of High-Speed Railway EngineeringMinistry of EducationChengduPeople’s Republic of China

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