摘要
针对铁路沿线列车振动造成的危害,对这种振动在铁路旁土层中产生的振波进行了实测及研究。通过实测,对这种振波的过程曲线特征进行了描述和分析,指出这种振波的振动频率,幅度范围及振动过程中的脉冲特征;并对振波在硬塑土层中的衰减特征,衰减系数等进行了论述。通过标定,研究了振波在土层中产生的周期性应力的大小及范围,对其在岩溶塌陷中的危害程度进行了论述。应用数值模拟的方法,对所研究的结论进行了验证。
From the actual measurement of the vibration wave induced from train with the geological condition of Karst collapse nearby railway,the vibration wave process and damping features of the wave are analyzed and discussed. The damping rule of vibration along railway is obtained and calculation is made for damping coefficient(0.2/m) in the hard plastic clay. From the distribution of damping coefficient,the safe depth of soil layer is presented for railway in given condition,which is about 7 meters. The damping coefficient may be impacted by precipitation,temperature,and the property of soil layer. In the research,the field measurement of vibration process from train is made,and the wave curve shows obviously a pulse feature in the process.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第12期2062-2066,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金重大研究计划项目(90102002)。
关键词
隧道工程
铁路振动
振波过程
衰减系数
岩溶塌陷
tunnel engineering,train-induced vibration,vibration wave process,damping coefficient,karst collapse
