【摘要】 为保证大断面隧道的稳定性和快速掘进,常采用台阶法施工。采用数值方法模拟了正台阶法与反台阶法隧道开挖,并以压力拱的参数变化为依据,对其进行稳定性分析。分析结果表明,在适用条件下采用正台阶法开挖更利于隧道的稳定性。更多还原

【Abstract】 In order to maintain the stability of the tunnel and ensure the speed of digging,the step method is commonly selected to excavate. In this text,the authors use the numerical method to simulate the front step method and reverse step method,together with parametric variation of the pressure arch to make an analysis on its stability. The experiment result indicates that it’s much more favorable for the front step method to maintain the tunnel’s stability when excavate under the suitable condition.更多还原