Research methods: According to verify the structure size of the tunnel the feasible catenary projects would be confirmed; According to the comparison of technique and investment the most suitable project would be chosen.
Research results: The whole main line of this engineering project is underground. Every technique capabilities of the rigid suspension can meet requires of this engineering project. And the rigid suspension is comparatively suitable than the others in some respects of suspension structure, power wastage, the quantity of maintenance and the investment. The superiority that simple structure and little quantity of maintenance of rigid suspension can be exerted in this engineering project.
Research conclusions: According to the research results, the DC 1500 V rigid suspension overhead catenary system is recommended for the first metro line of Haerbin. Along with the development of the technology of metro line, the suspension type of the catenary system would be ameliorated and consummated continually. According to the practice and condition of the engineering project choosing the most reasonable suspension structure is the key to improve the quality and to reduce the investment of the engineering project.
2006, Vol. 23 
