冬奥会保障项目井下地电阻率观测专用电缆设计与测试

Special Cable Design and Test for Underground Earth Resistivity Observation of Winter Olympic Games Support Project

根据冬奥会保障晋冀蒙监测能力提升项目的设计方案,在晋冀蒙交界及附近区域的宝昌、集宁、阳原、大同、代县、临汾、通州和平谷等8个地电阻率台站原观测场地建设井下小极距全空间地电阻率观测装置系统。参照该项目对井下地电阻率观测的技术要求,设计了井下地电阻率专用电缆,在项目实施过程中对专用电缆的导体直流电阻、线间绝缘电阻等主要指标进行了技术测试。测试结果表明,该专用电缆适用于本项目井下地电阻率观测,可保障井下地电阻率观测装置的长期稳定性。

According to the design scheme of the 2022 Winter Olympics support project,apparent resistivity measurement in short electrode spacing wells will be installed at 8 stations,(i.e.,Baochang,Jining,Yangyuan,Datong,Daixian,Linfen,Tongzhou and Pinggu station),around vicinity of Shanxi-Hebei-inner Mongolia area.Following the observation requirements of well apparent resistivity measurement,the underground special cable is designed.During the implementation of the project,the main indexes such as cable DC resistance and line to line insulation resistance are tested.The results show that the special cable of this project is suitable for underground earth resistivity observation and can guarantee the long-term stability of underground earth resistivity observation device.