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高速交通路堤地基长期力学行为盾构隧道与地下工程土的特性与测试技术土的分子动力学研究

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盾构隧道与地下工程

Ø  盾构隧道开挖面稳定性及沉降控制技术

通过大型物理模型试验发现了开挖面局部失稳现象,基于大主应力土拱理论获得了非渗流及渗流条件下开挖面主动失稳极限支护力表达式,发现渗流条件下极限支护力为无渗流时的10-20 倍,提出了保证开挖面稳定性的掘进载荷域;建立了掘进过程中盾构-管片-地层相互作用模型,获得了不同支护压力、注浆率下软土地层扰动范围和程度,提出了减小软土地层扰动控制沉降的掘进参数,研发了钢套管注浆加固控制隧道沉降技术

Ø  软土地层盾构隧道变形机理及控制研究

基于大量的现场实测数据分析揭示软土地层盾构隧道全寿命周期结构病害发展规律,采用理论分析、数值模拟、经验分析相结合方法揭示区域地面沉降、结构渗漏水、列车荷载等不同因素诱发隧道沉降的内在机制。针对隧道环间剪切错台为主的纵向结构变形模式,基于铁木辛柯梁理论建立考虑隧道接缝剪切错台和弯曲张开耦合变形的纵向结构计算模型,打破传统模型中隧道为纯弯变形的假定误区。在提出的纵向结构模型基础上,结合弹性地基双参数模型提出考虑隧道环间剪切错台的土-隧道相互作用解析模型,为隧道纵向结构设计、运营期间的结构保护提供理论支撑。

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    代表性论文:

    Wu, H.N.Shen, S.L. Yang, J.Zhou A.N.Soil-tunnel interaction modelling for shield tunnels considering shearing dislocation in longitudinal jointsTunnelling and Underground Space Technology78(2018)pp 168-1772018/4/8

   Wu, H.N., Shen, S.L., Liao, S.M., Yin, Z.Y. Longitudinal structural modelling of shield tunnels considering shearing dislocation between segmental rings. Tunnelling and Underground pace Technology. 2015, 50: 317-323.

  Shen, S.L., Wu, H.N., Cui, Y.J., and Yin, Z.Y. Long-term settlement behavior of the metro tunnel in the soft deposits of Shanghai. Tunneling and Underground Space Technology, 2014, 40: 309-323.

  Wu, H.N., Shen, S.L., Chai, J.C., Zhang, D.M., and Xu, Y.S. Evaluation of the train-load-induced settlement of metro tunnels in Shanghai. Geotechnical Engineering, ICE Proceedings, 2015, 165(5): 396-406.

  Wu, H.N., Shen, S.L., Yang, J., Identification of Tunnel Settlement Caused by Land Subsidence in Soft Deposit of Shanghai, Journal of Performance of Constructed Facilities, ASCE, 2017, 31(6): 04017092.

 Wu, H.N., Huang, R.Q., Sun, W.J., and Shen, S.L. Leaking behaviour of shield tunnels under the Huangpu River of Shanghai with induced hazards. Natural Hazards, 2014, 70(2): 1115-1132.