SEVERAL ISSUES ON SIMPLY-CONSTRUCTED WELL OF ELECTRIC TUNNEL WHEN TUNNELS FOLLOWED BY WELL EXCAVATION
MO Haihong1，2，YANG Chunshan1，2，CHEN Junsheng1，2，BAO Shufeng1，2
(1. School of Civil Engineering and Transportation，South China University of Technology，Guangzhou，Guangdong 510641，China； 2. State Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou，Guangdong 510641，China)
Abstract：The simply-constructed well which is no inner supporting，efficient and circular was proposed. The comparison between simply-constructed well and conventional scheme was conducted and parameters sensitivity analysis of the well to segment deformation was conducted with finite element method as well as the key technology of structures design was explored. The results show that the construction technology，feasibility and influence on surrounding environment of simply-constructed well are superior to conventional one. The project cost of simply-well is only 7% of the conventional scheme，so it greatly saves the cost. It will form unstable structure when local segments were broken and segment deformations greatly increase. The influencing scope of the deformation is manifested on the snap rings and two segment rings on both sides，so it should add temporary supports for spilt ring and four segment rings which are obviously affected to ensure structures safety. The effect of well thickness and soft soil on segment deformation is significant，while the effect of the diameter and spilt rings is very small. It suggests that the size of working well should not be big on the premise of meeting the requirements of global stiffness and clearance.
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MO Haihong1，2，YANG Chunshan1，2，CHEN Junsheng1，2，BAO Shufeng1，2. SEVERAL ISSUES ON SIMPLY-CONSTRUCTED WELL OF ELECTRIC TUNNEL WHEN TUNNELS FOLLOWED BY WELL EXCAVATION. , 2014, 33(S2): 3817-3824.
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2014, Vol. 33 
