在铁路营业线改造中,信号工程施工除应符合新建铁路信号工程的要求外,还应不影响既有铁路的运营或将影响程度减至最小,并保证运输及施工安全。改建营业线的信号施工是在限定的时间内进行的,时间短、任务重,必须进行充分准备和精心组织,才能确保如期完成任务。1施工准备及要求1. In the reconstruction of railway operating lines, in addition to the signal engineering construction should meet the requirements of the new railway signal engineering, it should not affect the operation of existing railways or to minimize the impact, and to ensure the safety of transport and construction. Reconstruction of the signal line business is carried out within a limited time, time is short, heavy tasks, must be fully prepared and carefully organized to ensure that the task is completed on schedule. 1 Construction Preparation and Requirements 1.