深埋隧道围岩压力分布特点

Characteristic of Rock Pressure Distribution in Deeply Buried Tunnel

总结了深埋隧道围岩压力类型及产生机理,分析了深埋隧道的判定方法及规范法、数值分析法在深埋隧道围岩压力计算中的具体应用。同时,以某高速公路软岩隧道为研究对象,利用有限元软件Midas/GTS探讨了隧道埋深、围岩弹性模量等对深埋隧道围岩压力的影响规律,结果表明:深埋隧道的围岩压力会隧道埋深和围岩弹性模型的增加不断增加,但增加速率并不固定。

The types and generation mechanisms of surrounding rock pressure in deep buried tunnels are summarized,and the specific applications of the judgment methods,specification methods,and numerical analysis methods in the calculation of surrounding rock pressure in deep buried tunnels are analyzed.At the same time,taking a highway soft rock tunnel as the research object,using the finite element software Midas/GTS,the influence of tunnel burial depth and elasticmodulus of surrounding rock on the surrounding rock pressure of deep buried tunnels was discussed.The results showed that the surrounding rock pressure of deep buried tunnels increased continuously with the increase of tunnel burial depth and elastic model of surrounding rock,but the rate of increase was not fixed.