宁杭城际铁路列车运行引起的地面振动现场测试

摘要

The paper undertakes the site measurement for the vertical acceleration of ground vibration at the viaduct bridges caused by Nanjing-Hangzhou Inter-city Railway trains, analyzes the vibration law and its attenuation laws of its transmission, proves by the result that peak velocity and acceleration of the ground vibration reduces along with its distance from the viaducts, and the attenuation ranges of the vibration within 20 meters is bigger;indicates the ground vibration peak increases with the improved train speed, points out the ground vibration near the piers can be activated by the periodic wheelset force and the ground vibration far away from the piers can be transmitted by the ground vibration wave near the piers with little influence by the wheelset.%对宁杭城际铁路列车运行引起的高架桥段地面振动竖向加速度进行了现场测试,分析了振动特征及其传播的衰减规律,结果表明：地面振动峰值速度和加速度随着离高架桥距离的增大而减小,20 m以内时地面振动衰减幅度较大；地面振动峰值随列车时速的提高而增大；靠近桥墩处的地表振动主要是由列车周期性的轮轴力作用而激发,远离桥墩处的地表振动主要是从靠近桥墩处的地表振动波传播而来,受轮轴力作用的影响程度轻。