according to the characteristics of engineering geology and supporting design in weak rock tunnel is simulated, in this paper, the influence of system anchoring bolt during construction of large cross-section tunnel in weak rock by three-dimension finite element analysis 摘要结合软弱围岩隧道工程地质和支护设计特点,应用三维数值方法模拟研究了软弱围岩隧道系统锚杆在一次支护中的作用效果。
the result shows that system anchoring bolt not only reduces the internal force of primary support and secondary support, hence improves safety of the supporting structure; but also effectively restricts relaxation of surrounding rock, reinforces the surrounding rock, improves safety of the construction 研究结果表明,系统锚杆不仅可以大大降低一次支护和二次支护结构的内力,提高结构的安全度,而且可以有效抑止隧道周边围岩的应力松弛,改善周边围岩的受力特性,提高施工的安全性。