裂隙巖體中隧道變形破壞的節(jié)理有限元模擬計(jì)算
[Abstract]:Fracture rock mass is a kind of rock mass often encountered in underground engineering construction, and the study of its deformation and failure mechanism is the guarantee of engineering safety construction. Taking Guanshan Tunnel Project of Tianping Line as an example, the joint network finite element method based on modified Goodman element is adopted to regard the fracture rock mass as a binary structure composed of rock block, joint and fracture, in which the linear Mohr-Coulomb strength criterion and nonlinear Barton-Bandis shear strength criterion are adopted for rock block and joint and fracture, respectively. The deformation and failure characteristics of cracked rock mass during tunnel excavation and the settlement of tunnel arch roof under different working conditions are simulated and analyzed by finite element software Phase~2, and the influence of joint roughness (J _ (RC) in Barton-Bandis criterion on the stability of surrounding rock is discussed. The research method provides a new method for the numerical calculation of fracture rock mass, and the inversion results of joint roughness (J _ (RC) can provide a reference for support design and reinforcement measures.
【作者單位】: 太原理工大學(xué)礦業(yè)工程學(xué)院;
【基金】:山西省回國(guó)留學(xué)人員科研項(xiàng)目(2013-050) 2012年高等學(xué)校博士學(xué)科點(diǎn)專(zhuān)項(xiàng)科研基金(20121402110013)資助
【分類(lèi)號(hào)】:U452
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