Abstract：Research purposes: According to the difficulties in construction of weak enriched water surrounding rock grade VI Jiangmen Tunnel，the suitable advance reinforcement mode and tunnel excavation method were chosen． in order to ensure construction safety and road operation safety．
Research conclusions: ( 1) The horizontal churning jet pile was used for the advance reinforcement，and the large pipe roof in advance and CRD method were used for excavation to safeguard the tunnel under － passing the road． ( 2) With the finite element calculation software，the numerical simulation was made for the whole process of the tunnel excavation，the analysis was made for change trends of the stress and displacement of the surrounding rocks during excavation to decide the key points of the construction control and monitoring ground deformation． ( 3) The steel frame needed to be enclosed in time for a loop to prevent appearance of large displacement and floor swell．
Zhang Jianru． Grouting Technology for Construction of Water － rich Fault Fracture Zone Mountain Tunnel in High － pressure［J］． Journal of Railway Engineering Society，2010( 5) : 58 － 62．
Zheng Baocai，Meng Qingming，Wei Jiajun，etc．Research and Application on Construction Technology for Governing High － pressure Strand Cranny Water in Enriched Water Tunnel ［J］． Journal of Railway Engineering Society，2011( 1) : 66 － 69．
Shi Xiaoquan， Zhang Zhiqiang， Li Huayun．Experimental Study of Pre － reinforcement Technology for Weak Surrounding Rock of Tunnel ［J］． Chinese Journal of Rock Mechanics and Engineering，2011( 9) :1803 － 1809．
Zhao Yong，Liu Jianyou，Tian Siming． Experimental Study of Mechanical Characteristics of Support System for Weak Surrounding Rock of Deep Tunnels ［J］．Chinese Journal of Rock Mechanics and Engineering，2011( 8) : 1663 － 1670．
Zhang Peng，Li Xiaohong，Lu Yiyu． Application of Pipe Grouting Technology in Shallow Buried Aqueous Karst Tunnel ［J］． Chinese Journal of Underground Space and Engineering，2008( 3) : 517 － 522．
2012, Vol. 29 
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