Analysis of Mechanical Behavior of Shield Tunnel Openings Based on ShellContact Model
(1 Shanghai Tunnel Engineering & Rail Transit Design and Research Institute, Shanghai 200235; 2 Department of Geotechnical Engineering,Tongji University,Shanghai 200092)
Abstract：
Taking the mined metro staion constructed with large-diameter shield tunnel as background, and based on the shell-contact numerical calculation model, this paper makes a numerical analysis on the whole process of large-size opening of shield tunnel under the protection of internal support system,using the shell element to simulate the lining segement, the yielding spring to simulate longitudinal and circumferential bolts, and considering the coupling of compression and shearing of longitudinal and circumferential bolts. The aimes of this paper are to analyze the mechanical behavior of shield tunnel segement lining in the whole process of tunnel opening, to study the structural force transfer mechanism of lining structure when tunnel opening and internal supports removing, to determine the effect law of the longitudinal joint position on the segement lining response when the tunnel opening, and the importance of the internal support system, providing design suggestions for relevant shield tunnel opening.
GUAN Panfeng1 GUO Zhenkun2 WU Pengli2 LIU Xian2
.Analysis of Mechanical Behavior of Shield Tunnel Openings Based on ShellContact Model[J] MODERN TUNNELLING TECHNOLOGY, 2020,V57(5): 143-153
2020, Vol. 57 