Abstract：Research purposes: Control of the safety risks of shield machine launching and gong out of the tnnel is a critical process in construction of shield tunnel． For construction of the river － crossing slurry shield tunnel of the Line 2 of Wuhan metro，this paper presents the safety control system for the shield machine launching and going out of the tunnel and analyzes the application effect of the risk control so as to provide the reference to the similar works．
Research conclusions:The rapid，effective and reliable balance between the environment and shield construction parameters can be established by conducting the risk control of the whole process，including the beforehead control，matter control and subsequent control in the construction phrase． In the launching process of the shield machine，the monitoring points should be installed along the vertical axial cord position of tunnel according to the relative standards．During the tunneling of the shield machine，the tracing monitoring should be conducted and the dynamic analysis，the advanced alarm and the feedback should be conducted with the security alarm system for metro construction in order to provide the decision － making basis for adjusting the construction parameters of the launching tunneling section．
周 诚;李勇军;王承山. 越江地铁盾构隧道始发安全风险控制研究[J]. 铁道工程学报, 2012, 29(11): 87-93.
ZHOU Cheng，LI Yong－jun，WANG Cheng－shan. Research on Launching Safety Risk Control in Construction of Metro River －crossing Shield Tunnel. 铁道工程学报, 2012, 29(11): 87-93.
Xin Zhenxing，Wang Jinan，Ma Haitao，etc．Study on Rational Scope of Pre－Reiforcement at Starting Position for Shield Excavation［J］Chinese Journal of Underground Space and Engineering，2007 ( 6) : 513－518．
［2］唐忠．泥水盾构深井下组装始发与到达施工技术［J］．隧道建设，2006( 4) :37－41．
Tang Zhong．Erection，Launching and Arrival Technology of Slurry Shield Machine in Deep Shafts ［J］．Tunnel Construction，2006( 4) :37－41．
Xie Rengen，Ma Xiaoting．Decision for Launching Plan of Long＆Thin Mud－shield with Small Diameter under Different Geological Conditions［J］．Tunnel Construction，2007( 8) : 397－401．
Ding Haiming，Liu Yanhui，Li Zhong，etc．Discussion on Small Radius Curve Launching Point and Launching Direction in Shield Construction ［J］． Architecture Technology，2009(11) : 1025－1028．
Zhao Xiangping．Risk Control on the Slurry Shield Initiation of Shi ziyang Tunnel ［J］．Railway Construction Technology，2009(11) : 137－140．
［6］刘兵科，石萌．盾构250 m 半径曲线始发段管片姿态控制技术［J］．地下空间与工程学报，2009(11) :137－140．
Liu Bingke，Shi Meng．State Control Technique of Shield 250 m Radius Curve Lauching Segment Pipe［J］． Architecture Technology，2009(11) : 970－975．
［7］周诚．地铁工程建设安全控制系统设计与应用研究［D］．武汉: 华中科技大学，2007:1－5．
Cheng Zhou．Study on the Design and Application for Safety Control System in Metro Construction Project ［D］．Wuhan: Huazhong University of Science ＆ Technology，2007: 1－5．
Qian Qihu，Rong Xiaoli．State，Issues and Relevant Recommendations for Security Risk Management of China ’s Underground Engineering［J］．Chinese Journal of Rock Mechanics and Engineering，2007(2) : 195－197．
Wang Mengshu，Zhang Chengping．Analysis of Accident Induced by Urban Underground Project Construction and Its Control Measures［J］．Journal of Architecture and Civil Engineering，2008( 2) : 1－3．
Zhou Ying，Ding Lieyun，Zhou Cheng，etc． Analysis of Adaptability of Slurry Shield for Construction of River － crossing Tunnel［J］．Journal of Railway Engineering Society，2010(11) :68－73.
2012, Vol. 29 
版权所有 © 2014 《铁道工程学报》编辑部