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《Northern Communications》 2008-09
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Numerical Simulation of Determing Rational Clearance of Tunnel with Minor Clearance,Based on ANSYS

ZHANG Xiang-dong and others  
With application of tunnel with minor clearance in actual engineering,the determination of rational clearance of tunnel with minor clearance becomes already the first issue to need settling in engineering.By two dimensional elasticoplastic finite element method aiming at example of Dandong Dahuanggou Tunnel engineering,the paper simulates and analyzes the displacement,stress and palstic zone of surrounding rock of tunnel with minor clearance under different clearances and applies the strength reduction method to determine safety coefficient of tunnel under different clearances.Lastely,it determines a rational clearance of tunnel with minor clearance in terms of if the plastic zone of central rock of tunnel goes across and the safety coefficient is catastrophic.
【CateGory Index】: U452
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