隧道围岩渗透系数反馈分析

为了给渗透系数反演分析提供依据,该文首先分析了温度场与渗流场的基本理论、微分方程、边界条件的相似性,然后利用ANSYS的优化设计模块,以八台山隧道为背景,反演分析渗透系数。其中采用循环迭代的方法解决了自由面的求解问题。最终结果表明,ANSYS热分析模块可以较好地模拟渗透场,反演的参数也可以客观真实地反映真实情况,对于实际工程而言具有一定的指导意义。但是值得强调的是,反演分析仅仅只是野外勘测工作的一个延续而已,它可以减少野外作业的耗费,但是却不能替代野外作业。

Analysis on Permeability Coefficient Feedback of Tunnel Wall Rock

In order to provide the date for the inversion analysis of permeability coefficient,the article firstly analyzes the comparability of basic theory,the differential equation and boundary condition of the temperature filed and seepage field,and then utilizes ANSYS optimization design module to carry out the inversion analysis of permeability coefficient by Bataishan Tunnel,in which the use of circulation iterative algorithm solves the problem of free surface.Finally the result shows that ANSYS thermal analysis model can better simulate the permeability field.The inversion analysis of parameter can also objectively factually reflect the reality,and has some guiding meaning for the practical engineering.But it is worth emphasizing that the inversion analysis is only a continuity of field survey,and can decrease the consumption of the field work,but can not replace the fieldwork.