基于FLAC-3D的特长隧道围岩锚索加固稳定性分析

OWING TO THE FLAC-3D SPECIALITY TUNNEL SURRONDING ROCK ANCHORAGE CABLE CONSOLIDATES THE STABILITY ANALYSIS

特长隧道施工控制的难点是围岩变形的预测分析与加固,锚索加固是目前设计和施工单位技术人员较为关注的方法,但其理论分析尚未成熟,很难用传统的方法准确地对隧道锚索加固后进行数值模拟计算。采用专门进行土质、岩石和其他材料的三维结构受力特性模拟和塑性流动分析的 FLAC-3D 软件对隧道开挖后的暴露岩体建立基于三维有限差分数值模型,模拟开挖、支护过程,计算分析加长锚索前后开挖岩体的稳定性,得到较为精确的解。

The forecast being Surronding rock deformation analyses and consolidates the difficuh point that speciality tunnel construction controls, anchorage cable consolidates the method being that design and the unit in charge of construction technician pay close attention to at present comparatively , whose theoretical analysis is not yet mature but , the digital analog being in progress secretly schemes against after anchorage cable consolidates the tunnel very difficult to use accurate suiting of the tradition method. Adopt the rock mass carrying out soil property , rock and other material 3 - D structure on revealing of the tunnel excavation queen specially accepting the force characteristic property simulation and the analytical FLAC-3D of plasticity flow software to build the process simulating working , the shoring owing to three-dimensional limited difference numerical value model , at one＇s own post, the front and back calculating analysis lengthening anchorage cable excavates the rock mass stability , get the comparatively accurate solution.