弱膨胀性夹层位置对隧道稳定性的影响

The Influence of Different Location of Weak Swelling Rock Layer on the Stability of Tunnel

本文简述了塑性剪胀模型的原理，并提出了“薄型混合单元”，以此来分析具有弱膨胀性软弱夹层处于不同位置时对隧道稳定的影响。最后得出当软弱夹层处于上拱区时，对隧道的稳定性最为不利。

In this paper the principle of shear-swelling model is introduced and the thin slice mixing element is proposed for analysing the influence of different location of weak swelling rock layer on stability of the tunnel. The finite element analysis is carried out and the results show that the most unfavorable for the stability of the tunnel is the location of swelling rock layer in the arch ring.