... Abstract Three-dimensional numerical simulation was conducted to investigate the influence of shield directly cutting the pile foundation of surface settlements using the Hangzhou Metro Line 4 shield passing through a power tunnel. The thrust force of the tunnel working face and grouting...

... Abstract The design and manufacture of the traditional shield machine not only does not strictly consider the various influencing factors of the shield tunneling but also directly selects the existing shield machine or carries on the adaptive transformation to the existing shield machine...

... Abstract Herein, we propose synchronous technology combing shield tunneling and segment assembly based on the active closed-loop control of shield propulsion systems to solve the problem of the too-long construction periods for long-distance shield tunnel projects associated with conventional...

... the time-dependent response of soils in front of the excavation face as well as the soil– cutterhead interaction. This study presents a novel FE method to simulate the dynamic and continuous shield-tunneling process. In this method, the state variables are calculated based on either the stress or strain...

... reservoir geomechanics tunnel conference geologist geological subdiscipline society iop publishing iop conf excavation stiffness geology displacement environmental science 861 lining asian rock mechanic society reservoir characterization calculation deformation shield rheology...

... Abstract Current underground space development features ever-increasing scales. More and more planned tunnel lines have alignments that are characterized by varying passing depths. Both conditions make it more frequent that the shield tunnel face is exposed to heterogeneous ground consisting...

... Abstract It's essential to identify the soil distribution for shield tunneling construction, especially in mixed ground conditions. Machine learning models have been conducted to infer the stratigraphic heterogeneity, but mostly relying on the geological survey report. The sparse borehole data...

.... In this case, some operators of shield machines and large pipe jacking machines in China have begun to use a new method, through which the earth pressure balance state can be controlled by the cutter head torque, instead of the slurry pressure in the head chamber. In this study, we investigate the formation...

... shield construction materials water conveyance tunnel steel bar isrm international symposium sabzkouh water conveyance tunnel water pressure rock mass concrete lining tunnel asian rock mechanics symposium 29 tunnel lining Thickness kazhdomi formation lining Evaluation of Induced Forces...

... are investigated. According to these results, if three and ten cm overcutting were performed in the most and least favorable geotechnical condition respectively, double shield TBMs could be used in the 29030-31600 and the 34900-37490 Km of the tunnel. In the 31600-34900 Km, utilization of single and double shield...

.... The Gripper TBMs are used in solid rock conditions and the Shielded TBMs (Single or Double Shielded TBMs) are used in stable and unstable rock conditions. The success of each tunnelling system depends on the excavation process, the rock support concept and the mucking system and logistical system...