Influence of structural parameter included in nonlocal rock mass model on stress concentration around circular tunnel

Geodynamics and Stress State of the Earth's Interior 2017

Lavrikov, S.V.^1 ; Mikenina, O.A.^1 ; Revuzhenko, A.F.^1

Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia^1

关键词: Circular cross-sections;    Circular tunnels;    Deformation of rock mass;    Differential approximations;    Elementary volume;    Influence zones;    Stress concentration factors;    Structural parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/134/1/012037/pdf
DOI  :  10.1088/1755-1315/134/1/012037

来源: IOP

【 摘 要 】

A model of elastic body, including local curvature of elementary volume, is matched with a nonlocal model with a linear structural parameter in the differential approximation. The problem on deformation of rock mass around a circular cross section tunnel is solved numerically. The contours of the calculated stresses are plotted. It is shown that inclusion of local bends in the model results in expansion of influence zone of the tunnel and reduces stress concentration factor at the tunnel boundary.