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本文通过对高速列车运行时引起地面振动进行实测,研究地面振动的特点和衰减规律。实测数据表明,地面竖向振动随着距轨道中心线距离的增大而减小;地面的横向振动随距离的衰减规律是先增大后减小,在距轨道中心线距离5m处出现振动反弹放大区。利用ANSYS建立地基土~通信塔三维有限元模型,依据规范对此通信塔进行了静力分析,并采用时程分析方法计算通信塔在静力荷载和地面振动共同作用下的响应。分析数据表明,随着距轨道中心线距离的增大,地面振动对通信塔的影响逐渐减小。
In this paper, the ground vibration caused by high-speed train running is measured to study the characteristics and attenuation law of ground vibration. The measured data show that the vertical vibration of the ground surface decreases with the increase of the distance from the centerline of the track. The attenuation of the lateral vibration of the ground first increases and then decreases with the distance, and the vibration rebound occurs 5m away from the centerline of the track Enlarge the area. The three-dimensional finite element model of the foundation soil ~ communication tower was established by ANSYS. According to the code, the static analysis of the tower was carried out and the response of the tower under static load and ground vibration was calculated by using the time history analysis method. Analysis of the data shows that as the distance from the centerline increases, the influence of ground vibration on the communication tower decreases.