JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2017, Vol. 47 ›› Issue (1): 59-67.doi: 10.6040/j.issn.1672-3961.0.2016.232

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The control mechanism for super section tunnel on weak surrounding rock and its application

WAN Li1, WANG Chunhe2, WANG Qi3*, LI Shucai3, SHAO Xing1, JIANG Bei3,4, SUN Huibin3, QIN Qian3   

  1. 1.Shandong Provincial Communications Planning and Design Institute, Jinan 250031, Shandong, China;
    2. China State Construction Shandong Investment Company Limited, Jinan 250101, Shandong, China;
    3. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, Shandong, China;
    4. School of Civil Engineering and Architecture, Jinan University, Jinan 250022, Shandong, China
  • Received:2016-06-27 Online:2017-02-20 Published:2016-06-27

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Abstract: For making clear the failure control mechanism of super section tunnel, numerical experiments of weak rock control mechanism applied to super section tunnel were systematically carried out by the excavation methods that included CRD and double side wall drift methods. The change laws of tunnel surrounding rock deformation and supporting components force were compared and analyzed under four types of supporting schemes and different excavation methods, which included excavation without support, bolt support, H-beam arch support and H-beam-bolt support. The control mechanism of super section tunnel with weak surrounding rock was acquired. Field experiments of H type steel and anchor net shot rete combined support section tunnel were carried out by the excavation methods that including CRD and double side wall drift methods, and the vault settlement were 27.2 mm and 18.7 mm. The results showed that this support system had great effect on the stability control of surrounding rock and could ensure the safety of the site.

Key words: weak surrounding rock, numerical experiment, control mechanism, super large section, tunnel, field tests

CLC Number: 

  • TU45
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