Dynamic load is an important factor affecting the safety and stability of subway tunnel structures. To obtain the variation law of shield tunnel structure dynamic response under aircraft taxiing load, a three-dimensional numerical simulation of such tunnel under the action of aircraft taxiing load is performed on the basis of a project involving a shield tunnel orthogonal underpass taxiway. The effects of sliding speed and tunnel depth on the structure of the shield tunnel are also analyzed. The results show that the transverse displacement and acceleration response of tunnel segment exhibit evident time-space effect under the action of aircraft taxiing load. The transverse displacement and arch waist acceleration of the shield segment increase first and then decrease. The transverse displacement of the arch waist reaches its maximum when the aircraft taxis directly above the tunnel. The sliding speed exhibits an evident influence on the dynamic response of shield tunnel structure. The vertical and convergence displacements of tunnel segments increase with the increase in sliding speed. The dynamic response of tunnel structure is significantly affected by the factors of tunnel buried depth. The vertical and convergence displacements of tunnel segments decrease with the increase in tunnel buried depth. Therefore, the safety of the shield tunnel structure can be ensured by controlling the taxiing speed when the aircraft taxis directly above the tunnel. The measures of increasing the buried depth of the tunnel or strengthening the tunnel structure need to be considered when the taxiing speed is large.

中文翻译：

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飞机滑行载荷作用下盾构隧道结构动力响应

动荷载是影响地铁隧道结构安全稳定的重要因素。为获得飞机滑行载荷作用下盾构隧道结构动力响应的变化规律，以盾构隧道正交地下通道滑行道工程为基础，对该隧道在飞机滑行载荷作用下进行三维数值模拟。还分析了滑动速度和隧道深度对盾构隧道结构的影响。结果表明，在飞机滑行载荷作用下，隧道管片横向位移和加速度响应表现出明显的时空效应。盾构段横向位移和拱腰加速度先增大后减小。当飞机在隧道正上方滑行时，拱腰的横向位移达到最大值。滑动速度对盾构隧道结构的动力响应有明显的影响。隧道管片的垂向位移和收敛位移随着滑动速度的增加而增大。隧道结构的动力响应受隧道埋深因素的影响显着。隧道段的垂向位移和收敛位移随着隧道埋深的增加而减小。因此，当飞机在隧道正上方滑行时，可以通过控制滑行速度来保证盾构隧道结构的安全。滑行速度较大时，需考虑增加隧道埋深或加强隧道结构等措施。