Selected papers from the Fourth Geo-China International Conference, held in Shandong, China, July 25–27, 2016. Sponsored by Shandong University, Shandong Department of Transportation, University of Oklahoma, Chinese National Science Foundation, and the Geo-Institute of ASCE. This Geotechnical Special Publication contains 34 peer-reviewed papers on tunneling and deep excavations. Topics include: monitoring and settlement control; tunnel construction, repair, and rehabilitation; tunnel vulnerability and security; modeling and tunnel design; and deep excavations and urban tunneling. GSP 260 will be valuable to engineers and researchers involved in all aspects of tunneling and deep excavations.