Dynamic Simulation of the Effects of Design Parameters of Overlapped Tunnels on the Stability of Existing Tunnels
(1 Department of Resources and Civil Engineering, Shandong University of Science and Technology, Tai′an 271019; 2 Department of Building Engineering, Taishan Polytecnnic, Tai′an 271000)
Abstract：
Regarding construction of a new tunnel underneath an existing one, reasonable spacing and crossing an?
gle are the important design parameters that affect stability. To study the influence of different spacings and crossing angles on an existing tunnel, a parametric model was set up that simulates the dynamic changes of spacing and crossing angle based on the ABAQUS platform and programming with Python language, and the influence of different spacings and crossing angles on deformations at key points of the existing tunnel were analyzed. A finite element optimization analysis and calculaton program was compiled based on Matlab language, and a calculation for a dynamic model was conducted by taking the minimization of deformation at key points of the existing tunnel as the optimization goal, then an optimal combination of spacing and crossing angle suitable for the tunnel was put forward.Through a comparison between optimization calculation results and field monitoring data, the validity of the calculation results was verified. This research enriches the simulation calculation method for studying the influence of overlapped tunnel construction.
WANG Hui- 1 Zhao-Wen-Juan- 2
.Dynamic Simulation of the Effects of Design Parameters of Overlapped Tunnels on the Stability of Existing Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(1): 116-122
2017, Vol. 54 