WANG Chao, ZHANG Sherong, LI Hongbi, YU Mao. 2015: MEASURE OF SUPPORT CONTROL FOR FROZEN METHOD CONSTRUCTED ZONE OF WATER CONVEYANCE TUNNEL UNDER COMPLEX GEOLOGICAL CONDITIONS. JOURNAL OF ENGINEERING GEOLOGY, 23(2): 311-319. DOI: 10.13544/j.cnki.jeg.2015.02.016
    Citation: WANG Chao, ZHANG Sherong, LI Hongbi, YU Mao. 2015: MEASURE OF SUPPORT CONTROL FOR FROZEN METHOD CONSTRUCTED ZONE OF WATER CONVEYANCE TUNNEL UNDER COMPLEX GEOLOGICAL CONDITIONS. JOURNAL OF ENGINEERING GEOLOGY, 23(2): 311-319. DOI: 10.13544/j.cnki.jeg.2015.02.016

    MEASURE OF SUPPORT CONTROL FOR FROZEN METHOD CONSTRUCTED ZONE OF WATER CONVEYANCE TUNNEL UNDER COMPLEX GEOLOGICAL CONDITIONS

    • The stability analysis of surrounding rock and the measure of support control for the part of the loose sandstones layer in the water conveyance tunnel are difficult problems, because there is no perfect excavation and supporting control method. The evolution of the mechanical properties of the loose sandstones and the supporting force mechanism is analyzed under the engineering background of a domestic water conveyance tunnel. Sub-step supporting method and optimized supporting method for the frozen construction part across the loose sandstones layer are raised through theoretic and finite element simulation. The study shows that step by step combined support method can get ideal supporting effect. The disturbance attenuation should be considered during freezing and thawing process in carrying on the supporting structure stiffness design and numerical analysis. Supporting methods should consider geological conditions and make all of the supporting measures to achieve effective integration so as to make the supporting mechanism clear.
    • loading

    Catalog

      /

      DownLoad:  Full-Size Img  PowerPoint
      Return
      Return