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Estimation of Long-Term Tensile Strength of Roof in No.1 Cave of Niuchang Ancient Underground Caverns, Longyou, Zhejiang Province

GUO Gai-mei1, YANG Zhi-fa1, TAO Bo2,GAO Bing-li3   

  1. 1.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2.Institute of Resource and Information, China University of Petroleum, Beijing 102249, China;3.Institute of Construction and Civil Engineering,Xi’an University of Science and Technology, Xi’an 710054，China
  • Received:2006-08-23 Revised:1900-01-01 Online:2007-07-26 Published:2007-07-26
  • Contact: GUO Gai-mei

Abstract: The authors present a new method to estimate long-term tensile strength according to tensile cracks on roof of No.1 cave in Niuchang ancient underground caverns. Firstly, a model based on true initial and boundary conditions of Niuchang ancient underground caverns is established by Ansys, and then the range of tensile stress in cracked elements and perpendicular to cracks is obtained by FLAC-3D calculation, as 0.037-0.469 MPa. Because cracks in the roof occur after long time stress, and according to theory of strength I of material mechanics, such range can be regarded as roof long-term tensile strength in No.1 cave of Niuchang ancient underground caverns.

Key words: Niuchang ancient underground caverns, long-term tensile strength, numerical simulation

CLC Number: 

  • P642.2
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