基于信号精度分析的高速铁路沿线测震井地震动力反应研究  

A Study on Seismic Dynamic Response of Seismometer Wells along High-speed Railways based on Signal Accuracy Analysis

作　　者：王强 袁成 习博[3] 杜广宇[3] 刘洋[4] WANG Qiang;YUAN Cheng;XI Bo;DU Guangyu;LIU Yang(China Railway,Beijing 100844,China;Southwest Jiaotong University,Chengdu 610031,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中国国家铁路集团有限公司,北京100844 [2]西南交通大学,成都610031 [3]中铁第四勘察设计院集团有限公司,武汉430063 [4]中铁二院工程集团有限责任公司,成都610031

出　　处：《高速铁路技术》2022年第2期1-5,共5页High Speed Railway Technology

基　　金：四川省科技支撑计划应用基础研究计划重点项目(20YYJC0720)。

摘　　要：地震是对高速列车安全运营威胁最大的自然灾害之一。地震预警技术是当前减轻或避免地震对高速铁路危害的重要措施,日本、法国及中国相继建立了高速铁路地震预警系统。现阶段高速铁路地震预警系统测震井问题仍然突出。然而以往的研究很少有对测震井自身参数对监测精度的影响进行研究。随着运行速度的增加,将会对测震井的关键设计参数提出更加严格的标准,因此需要测震井关键设计参数开展系统研究。本文通过建立数值仿真分析模型,输入不同类型,不同强度的地震波研究测震井的动力特征以及对监测精度的影响。通过研究发现,地震波在传递至测震井时具有放大效应,综合不同工况的计算结果,提出了建议测震井尺寸。Earthquake is one of the natural disasters that pose the greatest threat to the operation safety of high-speed trains.Japan,France,and China have successively established earthquake early-warning systems for high-speed railways,since it is recognized as a currently important measure to reduce or avoid the damage of earthquakes to high-speed railways.At present,the problem of seismometer wells in high-speed railway seismic early warning systems is still prominent.However,few previous studies focused on the influence of seismometer well parameters on monitoring accuracy.As the operation speed increases,more stringent standards will be proposed for the key design parameters of seismometer wells,therefore it is necessary to study the key design parameters of seismometer wells in a systematic manner.In this paper,a numerical simulation analysis model was established,and different types of seismic waves with different intensities were input to study the dynamic characteristics of seismometer wells and the impact on monitoring accuracy.The results show that the seismic wave has an amplification effect when transmitted to the seismometer well.Based on the calculation results of different cases,the suggested size of the seismometer well is proposed.

关 键 词：测震井 地震预警 高速铁路 动力响应 信号分析 

分 类 号：U238[交通运输工程—道路与铁道工程]