T/SHJX 055-2023 The basic conditions for the operation of the signal system update and renovation of Shanghai urban rail transit

Scope

Main Technical Content: The overhaul cycle of urban rail transit control systems is generally around 15 to 20 years. In recent years, many signal system overhaul and renovation projects have been carried out on early-built rail transit lines in China. According to the different characteristics of the construction cycle, passenger flow demand, and existing system standards of these lines, the overhaul and renovation solutions include maintaining the original system standard, replacing and upgrading the system standard, and upgrading the system compatible with the existing standard. After the renovation, the performance requirements of the new system should be the same as those of the new line. However, due to the actual conditions of the existing rail transit infrastructure and daily operations, the system renovation needs to be carried out under limited conditions. In current technical renovation projects, there are many professional fields involved, a long renovation period, and high validation difficulties. It is necessary to ensure the normal operation of the existing system while taking into account the impact of repeated switching and testing on the normal operation of the existing line during the renovation period, to ensure a smooth transition of line operation, and to make the upgraded system meet the expected goals, which is very different from the safety assessment process and standards for new line construction. To clarify the basic requirements for the functional, performance, and operational management of facilities and equipment systems before the system cutover operation of urban rail transit overhaul and renovation projects, it is necessary to study the cutover conditions of the system before its operation and simultaneously formulate pre-operation safety assessment technical specifications. Therefore, led by Shanghai Metro Maintenance and Protection Co., Ltd., Tunnel and Rail Transit Design Research Center of Shanghai Rail Transit Group Co., Ltd., C

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