Research on settlement analysis and control measures: a case study of the Nanjing Heyan road river-crossing shield tunnel passing under the Yangtze #br#
River embankment
(1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092，China；2. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China；3. Shanghai SMI Highway(Group) Co.，Ltd.，Shanghai 200092，China)
Abstract：Nanjing Heyan Road cross-river tunnel is constructed with a super-large-diameter slurry shield (excavation diameter 15.07 m)，which needs to pass through the Nanjing Baguazhou embankment. With this project as the background，the finite element analysis software is employed to establish a three-dimensional numerical model of the super-large shield tunnel crossing the Yangtze River embankment. Taking into account construction factors such as soil excavation，slurry support，segment lining，grouting behind the lining，and ground loss，a detailed numerical simulation of the construction process is carried out. The numerical solution is compared with the monitoring data to verify the rationality of the model，and then to study the variation of the embankment settlement when the slurry shield passes through the embankment，and analyze the influence of different grouting pressures on the embankment settlement. At last，this paper summarizes the settlement control measures of the slurry shield passing through the embankment from seven aspects. The measured maximum settlement of the embankment is 21.7 mm，which is controlled within 0.5% of the height of the embankment，and a good control effect has been achieved，which can provide a reference for similar projects.
谢雄耀1，2，杨昌植1，2，王 强1，2，曾 里1，2，侯剑锋3，周 彪1，2. 南京和燕路过江通道盾构穿越长江大堤的沉降分析及控制研究[J]. 岩石力学与工程学报, 2021, 40(S2): 3313-3322.
XIE Xiongyao1，2，YANG Changzhi1，2，WANG Qiang1，2，ZENG Li1，2，HOU Jianfeng3，ZHOU Biao1，2. Research on settlement analysis and control measures: a case study of the Nanjing Heyan road river-crossing shield tunnel passing under the Yangtze #br#
River embankment. , 2021, 40(S2): 3313-3322.
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2021, Vol. 40 
