<<
[an error occurred while processing this directive] | [an error occurred while processing this directive] >>
Dynamic Response Analysis of Blasting Excavation for a Tunnel Passing through Faults
(1 School of Civil Engineering and Architecture, Changsha University of Science and Technology, Changsha 410114;
2 Key Laboratory of Bridge Engineering of Hunan Provincial Universities, Changsha University of Science and Technology, Changsha 410114;3 School of Construction Engineering, Xinyu University, Xinyu 338004)
Abstract Considering that fault zones are key areas in tunnel construction due to poor stability of rock masses, and based on ANSYS/LS-DYNA software, a 3D numerical simulation under the blasting load is performed for a tunnel passing through faults；the influences of faults at different locations on the dynamic responses of the surrounding rock are analyzed; the distribution characteristics of the peak values of the rock’s vertical displacements, vertical vibration velocities and maximum principal stresses are summarized; the most unfavorable locations and working conditions, as well as the safe distance between the sidewall and fault, are presented for such a tunnel.
Abstract：
Considering that fault zones are key areas in tunnel construction due to poor stability of rock masses, and based on ANSYS/LS-DYNA software, a 3D numerical simulation under the blasting load is performed for a tunnel passing through faults；the influences of faults at different locations on the dynamic responses of the surrounding rock are analyzed; the distribution characteristics of the peak values of the rock’s vertical displacements, vertical vibration velocities and maximum principal stresses are summarized; the most unfavorable locations and working conditions, as well as the safe distance between the sidewall and fault, are presented for such a tunnel.
2016, Vol. 53 