... Abstract Because of large temperature difference between inside and outside of tunnel lining in high ground temperature environment, thermal stress is easy to occur in the structure, which affects the stability of tunnel lining. In this paper, a three-dimensional thermo-mechanical coupled...

... and the shield-machine. In this paper, the designs of shield-machine empty-pushing and shield-machine attitude were numerically analyzed and optimized based on the actual excavation process of Guangdong Rail Transit Line 21 in China. The conclusions are as follows: (1) during the tunneling process of the shield...

... to the surrounding environment. A long-span three-lane quasi-ellipse shield tunnel was proposed and the inner contour was sketched according to the functional requirements of its internal space. To ensure the enough the bearing capacity and the anti-deform ability of the segmental lining, the structural design...

... geologist reservoir geomechanics excavation lining tunnel geology reservoir characterization society iop publishing iop conf deformation evolution conference wellbore design geological subdiscipline environmental science 861 tensor unrecoverable time-dependent deformation time...

... geologist reservoir geomechanics ventilation shaft tunnel loading wellbore design geological subdiscipline environmental science 861 lining society iop publishing iop conf time history vibration characteristic explosion geology simulation reservoir characterization conference...

... 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...

... right above the water table, and above the base level of karstification, in the transfer zone. During time, the concrete lining suffered deterioration mainly due to cavitation processes that led to pierce the lin-ing and the water flowing from the tunnel into the surrounding rock-mass. The water...

... by the surrounding rock mass because of the drainage effects. While the pore pressure differences between the inner and outer edges of the lining are dramatically reduced, which greatly reduces the load borne by the lining and ensures the stability of the lining structure. In general, the surrounding rock...

...11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science 861 (2021) 042113 doi:10.1088/1755-1315/861/4/042113 Study on cracking behavior of tunnel linings with the diseases of void and lining insufficient thickness Wei Han1, Yujing Jiang1...

... construction conference frost heave jilin beishan lining ski resort prevention 11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science 861 (2021) 042023 doi:10.1088/1755-1315/861/4/042023 Prevention of Frost Heave in the Surrounding Rocks...

... recovery mudstone engineering lining thermal diffusivity efficiency 11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science 861 (2021) 072129 doi:10.1088/1755-1315/861/7/072129 Study on Heat Transfer Model and Applicability of Energy Piles...

... Abstract Prestressed lining with unbonded annular anchors is a new type of lining used in hydraulic pressure tunnels. First, the key points of numerical modeling are analyzed based on the stress characteristics of the lining. Thus, the corresponding modeling methods are proposed: the contact...

... of voids and lining insufficient thickness on the mechanical and deformation behavior of concrete linings. At first, the lining model with the diseases of void and lining insufficient thickness was established in the frame structure analysis platform. Subsequently, the lining inner force (taking...

... to a gap between research and engineering practice. geologist structural geology mathematics of computing environmental science 861 tunnel lining society iop publishing iop conf plate tectonics reservoir characterization fault-crossing tunnel conference mountain tunnel university...

... Abstract Some vertical wells are excavated in the horizontal rock layers with different thicknesses and permeability coefficients, and have concentric rings such as lining and grouting circle. The exiting formulas, which are derived for the unlined wells in homogeneous body, are inapplicable...

... Abstract As the development of underground engineering, shield tunnels in single-pipe and double-deck type have been widely used and promoted to improve the utilization rate of the effective space. For this complex structure, fire may trigger tunnel lining structure damage or even the failure...

...-structure can ensure the surrounding rock under triaxial compression from beginning to end to boost its strength. There be two possible technical routes to achieve a pre-structure in this preliminary study. One is to construct lining in advance of excavating, the other is to reinforce the surrounding rock...

... and the rock were assumed to be elastic. The lining was simplified into segmental equivalent rings by the principle of stiffness equivalence. Beam elements were used to imitate bolts placed between adjacent segments. Nanjing synthetic earthquake motion was inputted from the bottom of the model, and the shaking...

...11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science 861 (2021) 052089 doi:10.1088/1755-1315/861/5/052089 Tunnel shape optimization method considering the interaction between lining and soil Qiangqiang Bai1,2, Jian Chen1,2,3,4,5,6,* 1...

... Abstract The new prestressed reinforced concrete lining with multi-layer (up to 2) multi-hoop (up to 2) un-bonded annular anchors (hereinafter referred to as MUAA lining) is a new type of structure suitable for hydraulic pressure tunnel. The structural characteristics and design concept...