Nowadays, the need for subway tunnels has increased considerably with urbanization and population growth in order to facilitate movements. In urban areas, are excavated shallow depths under densely populated areas soft ground. Its associated hazards include poor ground conditions surface settlement induced by tunneling. Various sophisticated variables influence of caused The shield machine's op...

The research on the dynamic response and influencing factors of shield tunnel lining under earthquake demonstrates significant engineering value in guiding design antiseismic tunnels. In this paper, a nonlinear finite element model soil-tunnel interaction is established based FLAC difference software, then Mohr–Coulomb elastoplastic plastic damage are used to simulate characteristics soil tunne...

As a result of China’s urbanization, it has been common phenomenon that adjacent deep excavations were constructed near underground structures, which can have series detrimental effects on existing tunnels. Thus, is crucial to assess the tunnel response induced by overlying excavation, with aim maintaining safety and serviceability operating The shield idealized as an infinite beam lying upon t...

In this study, the seismic interaction of surface foundations and underground cavities was investigated. For this purpose, a parametric study of geometric dimensions of the foundation and cavity, their location, and the effect of the interaction between surface foundations and underground cavities was evaluated. The variable parameters include the ratio of the overburden height to the foundatio...

high speed wind tunnels are widely used in the study of fluid flow behavior around various objects. the air flow in the starting step of supersonic wind tunnels is transient including strong shock waves caused by the interaction of the tunnel main stream and the boundary layer at walls. to arrive in running step, the tunnel must be designed so as these waves leave immediately the test section. ...


 Based on the utility tunnel project of Chengbei Road in Suzhou, experimental study mechanical and deformation properties pipe soil rectangular jacking construction with controllable cement grouting drag reduction technology is carried out. monitoring analysis stress joints during jacking, relevant theoretical model established finite element simulation out to experimentally compare techn...

In order to solve the water sealing problem of soil between pipes of long distance curved pipe-jacked technology, Freeze-Sealing Pipe Roof (FSPR) as an innovative pre-supporting method in tunnel engineering is being applied to the Gongbei Tunnel in the Hong Kong-Zhuhai-Macau Bridge. The definition of FSPR is that large diameter steel pipes are laid out in a circle around the cross section of tu...

Isolation piles are widely used to control the influence of shield tunnelling on adjacent buildings as an effective protective measure. However, restraint effect isolation pile surface settlement trough is rarely explored from internal mechanism. Firstly, mechanism investigated pile-soil-tunnel interaction Secondly, based Melan solution and Loganathan formula, analytical under derived. Thirdly,...