A Hybrid Regional Model for Predicting Ground Deformation Induced by Large-Section Tunnel Excavation  

作　　者：Shengjun Deng Yang He XiaonanGong Jiajin Zhou Xiangdong Hu 

机构地区：[1]Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing,210009,China [2]Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou,310058,China [3]Department of Civil and Environmental Engineering,Princeton University,Princeton,08544,USA [4]Key Laboratory of Geotechnical and Engineering of Ministry of Education,Department of Geotechnical Engineering,Tongji University,Shanghai,200092,China

出　　处：《Computer Modeling in Engineering & Sciences》2023年第1期495-516,共22页工程与科学中的计算机建模（英文）

基　　金：supported by the financial support from National Natural Sci-ence Foundation of China(No.51478340);Natural Science Foundation of Jiangsu Province(No.BK20200707);Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.20KJB560029);China Postdoctoral Science Foundation(No.2020M671670);Key Laboratory of Soft Soils and Geoenvironmental Engineering(Zhejiang University),Ministry of Education(No.2020P04).

摘　　要：Due to the large number of finite element mesh generated,it is difficult to use full-scale model to simulate largesection underground engineering,especially considering the coupling effect.A regional model is attempted to achieve this simulation.A variable boundary condition method for hybrid regional model is proposed to realize the numerical simulation of large-section tunnel construction.Accordingly,the balance of initial ground stress under asymmetric boundary conditions achieves by applying boundary conditions step by step with secondary development ofDynaflowscripts,which is the key issue of variable boundary conditionmethod implementation.In this paper,Gongbei tunnel based on hybrid regional model involvingmulti-field coupling is simulated.Meanwhile,the variable boundary condition method for regional model is verified against model initialization and the ground deformation due to tunnel excavation is predicted via the proposed hybrid regional model.Compared with the monitoring data of actual engineering,the results indicated that the hybrid regional model has a good prediction effect.

关 键 词：Freeze-sealing pipe roof method frozen soil TUNNEL regional model dynaflow 

分 类 号：U455[建筑科学—桥梁与隧道工程]