Abstract: The signaling system design scheme of Lingzhuang block post at the newly built Huang-Da railway proves that by flexibly using the existing cut points of sectional track circuit, the influence of inserting branching turnout on the sectional signal distribution point can be effectively reduced, the wide range of relocation of trackside signal equipment can be avoided, thus the investment costs can be significantly saved. Based on the train operation and railway line mode, the advantages and disadvantages of the three interlocking control modes for block post, which are independent interlocking control, directly controlled by adjacent station and regional interlocking control, are analyzed from the aspects of technical difficulties, personnel allocation and engineering investment.

Key words: signaling system, reconstruction of existing railway line, untwining line, block post, connecting station, regional interlocking, automatic blocking

摘要： 新建黄大线岭庄线路所的信号设计方案证明通过灵活利用既有区间的轨道电路分割点，可以有效减少插入分歧道岔对该区间信号布点的广泛影响，避免轨旁信号设备的大范围迁改，进而显著节省投资成本。依托该行车和线路模式，从技术难点、人员配置和工程投资等方面分析独立联锁控制、纳入邻站直接控制、区域联锁控制这3种线路所联锁控制方式的优缺点。

关键词: 信号系统, 既有线改造, 疏解线, 线路所, 接轨站, 区域联锁, 自动闭塞