关键词: 长冲隧道, 台阶分部法, CD工法, 数值模拟

Abstract: Based on engineering geological feature of tunnel setting, a finite element of entrance of Changchong tunnel is established, which can simulate the construction process under the bench method and CD method. Displacement, stress, characteristics of yield degree of surrounding rock and the force of supports structure are analyzed. Construction process and stress of these two methods are compared so as to optimize the practical construction scheme. The result indicates that bench method is better than CD method.

Key words: Changchong tunnel, bench method, CD method, numerical modeling