超大断面山岭隧道初期支护参数合理性分析

Rationality Analysis of Initial Support Parameters of Super Large Section Mountain Tunnel

以广东省深圳市的莲塘隧道为案例,讨论了超大断面山岭隧道初期支护参数的合理性,应用有限元数值模拟计算,对其采用的初期支护参数、钢格栅拱架、锚杆长度、环向间距布置进行了合理化分析。通过计算机分析验证了该分析方法的可行性,解决了在没有相应的设计、施工技术规范、标准的情况下分析超大断面隧道设计的合理性问题,为类似工程提供了参考实例。

Taking Liantang tunnel as an example,the rationality of the initial support parameters of mountain tunnels with super lager section is analyzed.The rationality of initial support parameters,grid-steel arch frame,bolt length and circumferential space arrangement are analyzed by the finite element numerical simulation.The computer analysis proved that the analysis method is not only feasible but also solve the problem that the rationality of design of mountain tunnel with super large section can be analyzed without corresponding design,construction technical specification and standard.It provides reference for similar projects.