中文摘要：

高速铁路隧道大多为双线隧道，跨度大、建设速度快，形成的裂纹情况复杂。以厦深铁路照镜山隧道为例，叙述了该隧道裂纹的具体情况，分析了大跨度无配筋隧道在没有外力作用下裂纹形成的原因，介绍了此种情况下裂纹的处理原则与方法。

英文摘要：

In general, the high-speed railway tunnel was a tunnel, the design of large span, and construction speed was very quick,tunnel crack formation complex.Taking Xiamen-Shenzhen railway in mountain tunnel as an example,described the tunnel crack situation,analyzed of large span tunnel without reinforcement in the absence o fany extemal forced crack formation reason,introduced the case of crack processing principle and method.