Traction substation which obtains power from power system supplies power for overhead contact system by feeders.
牵引变电所从电网取得电能，经馈线向接触网供电。
Among the four electrical power system mentioned before, the most economical and reasonable one is the overhead contact voltage power supply which is supplied by the overhead contact directly.
在所设置的四种供电系统中，由接触网电压直接供电的网压电源是最经济、最合理的供电系统。
The overhead bridge in electric railway is an important factor for the contact system to operate in a safely and reliably.
电气化铁道跨线桥是影响接触网安全可靠运行的一个重要因素。
Research methods:The analysis is made for the present situation of catenary of overhead contact wire system and main measures against wear of it.
研究方法：通过对接触网承力索的现状和主要防磨损措施的研究来进行分析。
Research results: The basic calculation method for foundation of rock anchor rod for overhead contact wire system, (foundation) structure and its construction method are put forward.
研究结果：提出接触网支柱岩石锚杆基础计算方法，基础构造及施工做法。
Research results: The basic calculation method for foundation of rock anchor rod for overhead contact wire system, (foundation) structure and its construction method are put forward.
研究结果：提出接触网支柱岩石锚杆基础计算方法，基础构造及施工做法。
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