电力线路跨越电气化铁路倒塔范围计算方法--以津兴铁路为例

A Coverage Calculation Method Pour Tower Dumping with Electrified Railway across Power Lines:Taking Tianjin-Daxing Railway as an example

电气化铁路快速发展过程与输电走廊不可避免地出现交叉跨越,极端环境条件下输电走廊杆塔会出现倒塔及断塔头等情况,当杆塔侵入到电气化铁路时,会影响电气化铁路的安全运输。针对该问题开展研究,建立典型电力杆塔模型,分析最大导线拉断力条件下杆塔应力及应变情况,结合电气化铁路与电力线路交叉跨越情况,提出基于倒塔特性的电气化铁路与电力线路交叉跨越情况安全防护范围计算方法。研究表明,杆塔初始最大变形量在碰撞位置与杆塔基座之间,约为第二塔头位置,最大变形量约为米级。当单侧三相导线及地线总拉力超过拉断力时,杆塔距离地面约高2/3处出现应力过大的情况;杆塔向电气化铁路防护棚洞倒塔时,可获基于杆塔弯折点、杆塔与铁路间距的倒塔影响范围。研究成果可为电力线路防护棚洞修建长度提供数据支持。

Electrified railway rapid development process and transmission corridor inevitably appear cross.Extreme environmental conditions transmission corridor tower will be fall and break the tower top,and when the tower in electrified railway,it will affect the safety of electrified railway transportation.Aiming at the problem of research and the establishment of a typical power tower model,the largest wire tensile force under the condition of tower stress and strain of the cross combination of electrified railway and power lines is analyzed.The proposed electrified railway and electric power line intersection across the safety protection range calculation method,studies have shown that tower initial maximum deformation in the collision between location and tower base,which is about the second tower head position,maximum deformation of about m level.When single phase conductor and earth always pull over tensile force,the tower about call high from the ground stress too much about two-thirds happen.When the tower to electrified railway protective casing hole pour tower,can calculate pour tower fulcrum to the distance between the protective casing hole.The research results can be to build power line protection shed hole length to provide data support.