隧道衬砌裂拱机理分析及整治

Analysis of Failure Mechanism at Crown of Tunnel and Reinforcement Measures

对隧道衬砌出现裂拱事故的原因进行了分析 ,认为隧道裂拱是泥岩中的粘土矿物遇水膨胀产生巨大的水平侧压力作用在隧道拱部两侧导致的。提出了截断地表水渗入与树脂锚杆加固相结合的整治措施 。

After the analysis of failure at crown of a railway tu nnel,it is believed that large swelling pressure at crown produced by mudstone w hen meeting water leads to the failure The maintaining measures have been taken to reinforce cracking lining,including cutting off the path of ground water int o the mudstone,epoxy resin bolts reinforcement The reinforcement effect has pro ved to be very well after the test of another rain season