总结我国隧道及地下工程近两年的发展情况。1）铁路、公路、地铁、水工等主要领域的隧道总数和总长度快速增长。2）重难点隧道及地下工程建设进展顺利： 青藏铁路关角隧道、兰新高铁祁连山隧道、兰渝铁路木寨岭隧道、烟台地下水封LPG洞库、渝黔高铁天坪隧道等相继完工；港珠澳大桥沉管隧道、引松供水隧洞、引汉济渭输水隧洞、武汉三阳路长江隧道、大瑞铁路高黎贡山隧道、京张高铁八达岭地下车站、惠州地下水封油库、湛江地下水封油库、珠海横琴地下综合管廊等在如期建设中。3）特长山岭隧道建设技术、软岩隧道大变形控制技术、高瓦斯隧道建设技术、岩爆隧道建设技术、大断面矩形顶管及矩形盾构设计与应用技术、隧道机械化施工水平等方面取得了进一步的突破。我国隧道及地下工程修建技术整体处于国际先进水平。国家新型城镇化建设、新一轮西部大开发、“一带一路”、海绵城市、城市地下综合管廊、城市轨道交通、京津冀协同发展、长江经济带、珠三角经济区等战略规划，为我国隧道及地下工程领域技术发展带来了前所未有的契机。最后，基于隧道及地下工程发展方向，指出超长隧道技术，高地应力软岩大变形控制技术，高水压、大断面水下隧道建设技术，高地温、高地热隧道建设技术，高地震烈度与构造活跃带的隧道建设技术，隧道运营维护管理技术，新材料研发与应用的开发等是今后需要深入研究的关键课题。

The development of tunnel and underground works in China in recent two years is summarized as follows: 1) The quantity and total length of railway tunnel, highway tunnel, Metro tunnel and water supply tunnel increase rapidly. 2) Some of the key and difficult tunnels and underground works, i.e. Guanjiao Tunnel on QinghaiTibet Railway, Qilianshan Tunnel on LanzhouXinjiang Highspeed Railway, Muzhailing Tunnel on LanzhouChongqing Railway, Underground Watersealed LPG Cavern in Yantai and Tianping Tunnel on LanzhouGuiyang Highspeed Railway, have been completed; and some, i.e. immersed tunnel of Hong KongZhuhaiMacao Bridge, Songhua River Water Conveyance Tunnel, Hanjiang RiverWeihe River Water Conveyance Tunnel, Yangtze Rivercrossing Tunnel on Sanyang Road in Wuhan, Gaoligongshan Tunnel on DaliRuili Railway, Badaling Underground Station of BeijingZhangjiakou Highspeed Railway, underground watersealed oilstorage cavern in Huizhou, underground watersealed oilstorage cavern in Zhanjiang and underground utility tunnel in Hengqin District in Zhuhai, are under construction. Technologies, i.e. construction technologies for superlong mountaincrossing tunnel, control technologies for large deformation of soft rock tunnel, construction technologies for tunnel with high gas concentration, countermeasures for rockburst and design and application of large crosssection rectangular pipe jacking and shield, and mechanized construction level have reached great achievement. The construction technologies for tunnels and underground works in China are advanced 〖HJ2.1mm〗internationally. New requirements have been proposed by new urbanized construction, new round of Western Development, the Belt and Road, the Sponge City, urban underground utility tunnel, urban rail transit, coordination development of Beijing, Tianjing and Hebei, the Yangtze River Economic Zone and the Pearl River Delta Economic Zone. Finally, the author provides the developing directions of tunnels and underground works in China, which are construction technologies for superlong tunnel, control technologies for large deformation of high ground stress and soft rock tunnel, construction technologies for high water stress and large crosssection underwater tunnel, construction technologies for tunnels with high ground temperature and high geothermy, construction technologies for tunnels in sections with high seismic intensity and active tectonic zone, operation, maintaining and management technologies for tunnels and development and application of new materials.