ISSN 2096-4498
CN 44-1745/U
ISSN 2096-4498
CN 44-1745/U
Research on Primary Support Load Bearing Ratio of Deep Tunnels in Softweak Rock
Received date: 2017-01-16
Revised date: 2017-04-19
Online published: 2017-05-27
The surrounding rock load bearing ratio under 3 kinds of support method, i.e. grouting reinforcement ring, shotcreting and shapedsteel, are analyzed by finite difference numerical calculation software, taking Baoxing Hydropower Station water diversion tunnel for example. Three support schemes are designed and the load bearing ratios of every support structure are obtained. The study results show that: 1) The shapedsteel support, plays support strengthening timely effect, can control surrounding rock deformation effectively. 2) The shotcrete becomes main load bearing structure after reaches a certain strength, and the surface of shotcrete bears more releasing loads followed by grouting reinforcement ring. The load bearing ratio of shapedsteel support, grouting reinforcement ring and shotcrete is 1∶1.25∶1.6 as showed in calculation results.
XU Bangshu , CUI Yupeng , YAN Qin , LI Junyuan , ZHANG Mingwei , XIA Peng . Research on Primary Support Load Bearing Ratio of Deep Tunnels in Softweak Rock[J]. Tunnel Construction, 2017 , 37(S1) : 1 -6 . DOI: 10.3973/j.issn.1672-741X.2017.S1.001
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