Research on the Difficulties and Solutions of Construction Technology of Extra-Long Tunnel

With the rapid development of social economy,the requirement of tunnel construction technology is raised.Especially for the construction of extra-long tunnel with the thick overburden,complicated geological conditions and harsh construction environment,people put forward higher requirements.Therefore,on the basis of elaborating the technical difficulties in the construction of extra-long tunnel,this paper analyzes the technical difficulties in the construction of extra-long tunnel in combination with the actual situation,in order to better promote the construction and development of extra-long tunnel.