I . Tunnel and Underground works Branch of China Civil Engineering Societyis a unofficial academic organization, and is subordinate to the China Civil Engineering Society, the predecessor of which is the Chinese Institute of Engineers set up by our outstanding modern engineer Zhan Tianyou. Under the command of this society, there are many branches like the Bridge and Structure, the Tunneling and Underground Engineering, the Soil Mechanics and Foundation, the Concrete and Stress Concrete, the Port Engineering, the Municipal Engineering, the Urban Public Traffic, the Urban Coal Gas, the Water Supply and Drainage, the Protection Engineering, the Computer Application, the Construction Market and Bidding and the Research of the Project Method Construction, etc.

　　At the beginning of the Tunneling and Underground engineering branch, there are 7 specialized committees subordinate to it, namely, the Rock Tunneling Construction, the Combined bolting and Shotcrete and the New Austrian Method of Tunneling, the Tunneling Mechanics, the Underground Railway, the Waterproof and Drainage, the Utilization of the Underground Space and the Tunneling Engineering Contents. It is also the representative of China to the International Tunneling Association. The aim of the branch is to encourage the utilization and development of the underground space, to promote the development of design, construction, management and maintaining technology in tunneling engineering. Its primary tasks lie in conducting domestic and foreign academic exchanges, editing and publishing technological books and periodicals, providing consultation on many significant issues in national technological policy and economic construction, receiving commissions, providing technological service and continuing education for its members, popularizing knowledge of science and technology and promulgating advanced technology. The branch will reflect views and requirements of its members and hold many activities for them. At present, it is the 6 th Council of the Tunneling and Underground engineering branch, which is affiliated to the China Railway Tunnel Group CO., LTD.

　　In recent years, centering on the construction and developing of various underground projects such as railway and highway tunnel, hydraulic engineering tunnel, underground railway, utilization of urban underground space, mine and hollow, many famous enterprises, schools, academies and well-known academicians, experts, professors, researchers and technological staff around the society, have conducted large amount of consultation on scientific research and academic exchanges home and abroad in the fields of project planning, design, construction and scientific research, etc, and have made a great contribution to the promotion of the comprehensive technology of the underground engineering in China. Presently, there are three academicians of Chinese Academy of Engineering who are the directors of the Executive Council of Tunneling and　Underground Engineering. They are Qian Qihu, Zheng Yingren and Wang Mengshu. Among other academicians, Shi Zhongheng, Sun Jun and Liu Jianhang have once acted as directors in the council. Other directors are all experts in construction, scientific research, design and programming such as Xuanyuan Xiaowen, Wang Zhenxin, Guan Baoshu, Zhang Min, Wang Jianyu and Hou Xueyuan. The chairman of the executive council is Guo Shanyun, and the secretary-general is Wan Jianglin. In addition to holding annual meetings and attending ITA General Assembly on time, the executive council preside academic exchanges between Chinese Mainland, Hong Kong, Macao and Taiwan for several times, and provide proof and consultation for all levels of governments and departments on key projects, for example, the proof of the Yangtze River Tunnel Layout on Jinghu Railway by the Ministry of Railway, the proof of the Changda Tunnel Layout on many railways, the proof of Taiwan Strait Tunnel, Bohai Tunnel and Wuhan Cross River Tunnel Layout in Fujian, Shandong and Hubei, and the consultation on railway projects in Beijing, Nanjing, Shanghai, Guangzhou, Shenzhen and Shenyang. In the above mentioned projects , the society has played an important role.
　　In the near future, the theory and technology of underground engineering will gather a strong momentum. The 6 th executive council of the Tunneling and Underground engineering branch will continuously make great efforts to promote the advancement of the underground engineering technology, and to provide excellent service for all social circles.