EFFECTS OF SOIL CONSOLIDATION ON INTERACTION MECHANICS FOR MULTI-LINE OVERLAPPED TUNNELS AND EXISTING BURIED STRUCTURES
Large scale and intensive metro construction in the soft clay increases greatly the impaction on risk control and environment protection.Much more attentions are paid to the effects of tunneling excavation on existing buried structures during the construction process.However,current researches give little investigations on the effects of soil consolidation on existing structures during the service process.Based on the tunneling case for Shanghai Railway Transportation Line 11,the interaction mechanics for multi-line overlapped tunnels and existing service tunnels are proposed considering soil consolidation by 3D consolidation finite element numerical simulation method.The deformation behaviours for service Line 4 are obtained under several typical cases of soil consolidation,including one month later,two months later,four months later,half a year later,one year later,five years later,ten years later,and thirty years later.Comparisons between numerical simulation results and the field data are conducted according to site investigations.It is concluded that the soil consolidation has a significant influence on the deformation behaviour of existing tunnels during the service process.The stringent stipulations on controlling the deformation for existing buried structures and strengthened monitoring measures are necessary and substantial for reducing potential service risks.
multi-line overlapped runnels existing structures interaction mechanics soil consolidation numerical model
Z.G.ZHANG M.X.ZHANG H.M.WU X.XIAO
School of Environment and Architecture,University of Shanghai for Science and Technology,516 Jungong Department of Civil Engineering,Shanghai University,Shanghai,200072,China TBM Construction Branch,Shanghai Tunnel Engineering Co.Ltd.,Shanghai,200062,China Department of Civil Engineering.Shanghai University,Shanghai.200072,China
国际会议
5th China-Japan Geotechnical Symposium(第五届中日岩土工程学术会议)
成都
英文
411-417
2013-05-18（万方平台首次上网日期，不代表论文的发表时间）