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应用动光弹实验技术，按相似理论模拟隧道衬砌横断面，研究了隧道开挖中爆破产生的应力波对衬砌的影响。得出爆炸应为波在衬砌中的传播过程以及在爆炸应力波作用下衬砌中裂纹产生与扩展的规律。取得与工程实际较为吻合的实验结果，为探索隧道衬砌裂损产生的原因及防止措施提供了实验依据。（本课题系
Applying the theory of dynamic photoelastic test, the cross-section of tunnel lining is simulated according to the similar theory, and the influence of the stress wave generated by blasting on the lining is studied. It is concluded that the explosion should be the propagation process of the wave in the lining and the law of crack initiation and propagation in the lining under the action of the explosion stress wave. The experimental results that are in good agreement with the engineering practice are obtained, which provide the experimental basis for exploring the causes of tunnel lining cracks and preventing measures. (Department of this topic