State-of-the-art review on shotcrete

NOTES 19.KEY WORDS (Cont/nu• on rerar•• •Id• II n•c•Hcy .,dIdentity by block number) New Austrian Tunneling Method Shotcrete State-of-the-art studies Tunnel linings 20.ABST'FIACT (Coaflaue -,..,..r .. ., .ft,,__..,,.8ad.ldenllfr by block number)Thi.s report contains the results of four studies pertaining to shotcrete technology.The first part of the report is an overview of American practices in shotcrete.The second part is a discussion of the development and practice of shotcrete technology in Europe, including a description of the New Austrian Tunneling Method (NATM).The third part describes the experiences of the U. s.Bureau of Reclamation in using shotcrete for tunnel linings and their design and construction concepts.The final part of the report is a discussion of instrumentation currently employed for obtaining the data used in (Continued)