高速铁路引起季冻区场地环境振动实测分析
FIELD MEASUREMENT AND ANALYSIS OF ENVIRONMENTAL VIBRATION CAUSED BY HIGH-SPEED RAILWAY IN SEASONAL FROZEN AREA
赵杞超 1郑鑫 1解恒燕1
作者信息
- 1. 黑龙江八一农垦大学土木水利学院,黑龙江大庆 163319
- 折叠
摘要
为研究冬、夏两季高速铁路引起季冻区场地环境振动评价方法的适用性,文中分别于冬、夏两季在哈—齐高速铁路龙凤湿地段开展现场观测,并将数据进行时域和频域分析.结果表明随着距桥墩中心距离的增加,冬、夏两季各测点加速度时程均呈现出先急剧衰减后缓慢衰减的趋势,0～15m夏季加速度幅值要比冬季衰减的快;近轨道处冬季峰值频率为58Hz,夏季峰值频率为47Hz.研究为季冻区土场地的道路、桥梁等的选址提供参考.
Abstract
In order to study the applicability of the evaluation method of environmental vibration in seasonal frozen area caused by high-speed railway in winter and summer,field observation in Longfeng wetland section of Har-bin-Qiqihar high-speed railway in winter and summer is carried out,and the data in time domain and frequency do-main is analyzed.The results show that the acceleration time history of each measuring point in winter and summer shows a trend of rapid attenuation first and then slow attenuation with the increase of the distance from the center of the pier,and the acceleration amplitude of 0～15m in summer is faster than that in winter.The peak frequency of the near-orbit is 58 Hz in winter and 47 Hz in summer.This study may provide the reference for the site selection of roads and bridges in seasonal frozen soil sites.
关键词
高速铁路/季冻区/环境振动/现场观测Key words
high-speed railway/seasonal frozen region/environmental vibration/on-site observation引用本文复制引用
基金项目
黑龙江省自然科学基金联合引导项目(LH2019E072)
出版年
2024
NETL
NSTL
万方数据