Experimental study on interference of Beijing—Shanghai high-speed railway in geoelectric field observation
-
摘要: 现有地震观测国家标准分别给出了地磁、地电场、地电阻率对电气化铁路运输系统的有效避让距离，是在牵引功率不超过6 000 kVA的条件下[
1 ]，而京沪高铁的最高牵引功率为19 200 kVA，并且京沪高铁系统与普通电气化铁路系统存在着诸多不同，且已有标准也是很多年前测试的结果，当时所用仪器精度和测试的场地背景噪声，和当前监测使用仪器的精度和观测背景噪声，因仪器制造技术的进步和国家经济的快速发展，也是有很大的不同，故已有实验标准，虽仍具有参照意义，但无法完全按照这个标准选择场地和建设。本研究选择京沪高铁作为测试对象，通过野外场地观测实验，取得高铁对地电场观测的影响数据，通过专业数据软件分析、计算，获取京沪高铁运行对地电场观测所造成影响的范围、干扰形态及幅度，并通过FFT分析其频谱特征。Abstract: Under the condition that the traction power does not exceed 6 000 kVA, the effective avoidance distances of geomagnetism, geoelectric field and georesistivity for electrified railway transportation system are given respectively in the current 2004 edition of the national standards for seismic observation. The maximum traction power of Beijing—Shanghai high-speed railway is 19 200 kVA and there are many differences between the operation system of Beijing—Shanghai high-speed railway and the general electrified railway. Due to the progress of instrument manufacturing technology and the rapid development of national economy, the precision of instruments used and the background noise of testing sites have also changed greatly. Although the experimental criteria tested many years ago is of reference significance, it is difficult to select and construct sites according to this criterion. In this study, the Beijing—Shanghai high-speed railway is selected as the test object to carry out field observation experiments. Through analysis and calculation, the influence of Beijing—Shanghai high-speed railway operation on geoelectric field observation with respect of effective distance, interference pattern and spectrum characteristics is obtained. -
表 1 实验结果统计（沧州西站）
测向 400 m （max） 600 m （max） 800 m （max） 1 000 m （max） 1 200 m （max） 干扰形态 NS 0.285 0.087 0.032 0.0 0.0 尖峰 EW 0.556 0.380 0.154 0.0 0.0 NE 0.815 0.191 0.179 0.0 0.0 
下载: 导出CSV
-
[1] 中国地震局. 地震及前兆数字观测技术规范（电磁观测）[M]. 北京: 地震出版社, 2001 [2] 陈志刚,田山,徐学恭,等. 地电场观测漏电干扰的排查一例[J]. 华北地震科学,2012,30(4):44-48 [3] 陈志刚,邵永新,张磊,等. 唐山M4.8级和宝坻M4.0级地震前的地电场异常变化[J]. 高原地震,2013,25(3):25-30 doi: 10.3969/j.issn.1005-586X.2013.03.006 [4] 张明东,吴博洋,李宁,等. 轨道交通对电磁场叠加影响的特征分析[J]. 微波学报,2016,32(S2):583-585 [5] 张明东,何康,廖晓峰,等. 基于伪魏格纳-维勒分布的地磁场时频分析研究−以中国大陆东部地区为例[J]. 地震,2018,38(1):61-73 doi: 10.3969/j.issn.1000-3274.2018.01.006 -
点击查看大图
图(9) / 表(1)
计量
- 文章访问数: 339
- HTML全文浏览量: 140
- PDF下载量: 11
