【摘 要】
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Lining crack is the most common defect in road tunnel,and it is difficult for tunnel engineers to evaluate the safety status of lining structure with cracks accurately.In accordance with mechanical an
【机 构】
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Chongqing Jiaotong University Chongqing,China 招商局
论文部分内容阅读
Lining crack is the most common defect in road tunnel,and it is difficult for tunnel engineers to evaluate the safety status of lining structure with cracks accurately.In accordance with mechanical and geometrical characteristics of tunnel cracks,a calculating model for tunnel with longitudinal cracks is proposed in this paper.At the same time,contact friction effect between crack surfaces is taken into consideration in the evaluation methods for safety assessment of tunnels lining structure with cracks,Then the influence of crack angles on the safety of lining structure is analyzed based on the calculating model and evaluation methods.Calculation results show that the crack angle is an important parameter to determine the frictional contact states of the fractured surfaces and also important to determine the propagation of cracks and the stability of lining structure.The conclusions are helpful for further understanding and analyzing the loading mechanism of crack surfaces,and can be used as references for similar projects.
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