›› 2012, Vol. 33 ›› Issue (11): 3503-3508.

• Numerical Analysis • Previous Articles     Next Articles

Simulation of opening displacement of brittle rockmass at point of energy dissipation

ZHENG Wen-hua1，ZHU Wei-shen2，LIU De-jun3   

  1. 1. State Key Laboratory of Building Safety and Built Environment, China Academy of Building Research, Beijing 100013, China; 2. Geotechnical and Structural Engineering Research Center，Shandong University, Jinan 250061, China; 3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
  • Received:2011-10-12 Online:2012-11-12 Published:2012-11-14

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Abstract: The stability of large underground caverns in high geostress area has always been the hot topics of many rock mechanics professors’ attention. Based on the happening mechanism of opening displacements and considering the theory of energy dissipation, this paper makes a preliminary study of the constitutive equation of brittle rockmass in high geostress zone and their engineering application. First, a variational-modulus model has been received during the unloading course from the point of energy dissipation and this aspect is considered in the constitutive equation. Dissipation of energy can be gained from the theory of crack growth. Second, taking advantage of FLAC3D, we compile the above constitutive equation model on the Microsoft Visual C++ environment, and realize the secondary further development of FLAC3D. Third, the stability of surrounding rock and the excavation step in the large underground caverns of Jinping hydropower station are simulated by the developed program. The results indicate that this variational-modulus model is closer to real excavation. It offers some instructions to similar projects.

Key words: high geostress, brittle rockmass, dissipation of energy, FLAC3D, opening displacement, elastic-brittle constitutive equation

CLC Number: 

  • O 242
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