Volume 46 Issue 6
Dec.  2018
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ZHENG Wen, LIU Naifei, LIU Xiaoping. Mechanical characteristics of supporting structures for high geo-temperature tunnel[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(6): 138-143,149. DOI: 10.3969/j.issn.1001-1986.2018.06.020
Citation: ZHENG Wen, LIU Naifei, LIU Xiaoping. Mechanical characteristics of supporting structures for high geo-temperature tunnel[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(6): 138-143,149. DOI: 10.3969/j.issn.1001-1986.2018.06.020
shu

Mechanical characteristics of supporting structures for high geo-temperature tunnel

  • 1. School of Civil Engineering, Yulin University, Yulin 719000, China;

  • 2. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;

  • 3. Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China

Funds: 

National Science Foundation of Shaanxi Province(17JK0905)

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  • Received Date: March 07, 2018
  • Published Date: December 24, 2018
    Graphical Abstract
    • Abstract
  • High geo-temperature is a serious constraint to the construction and safe operation of underground engineering, will be studied based on a diversion tunnel in Xinjiang. According to the geological data, six different temperature boundaries were chosen. The deformation and stress characteristics of the surrounding rock and supporting structures were studied under four operating conditions such as spraying shotcrete, pouring concrete and flowing water. The research shows that the high geo-temperature has a marked impact on tunnel's stability, the axial force of bolt was 294 times as those which did not consider temperature, while the circumferential tensile stress was about 2.13 times; the insulating layer worked dramatically well, the axial force of bolt and circumferential tensile stress of lining were bigger if without insulating layer; the cold water had big impact on the lining stress, circumferential tensile stress of lining was 2.65 times as that without water flowing. The research results provide reference for the design and construction of similar project.
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    • References (15)
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