动车车底和高铁线路损坏案件的现场勘查和技术鉴定

The Investigation and Technical Appraisal for the Cases of Damaging MU Train Floor and High-speed Railway

动车车底和高铁线路损坏案件的特点有发现时间与发生时间相隔长、勘查难度大、痕迹容易形成和异物容易发现等。动车车底痕迹有单条状擦划痕、多条状擦划痕、片状不规则裂痕等类型,线路损坏痕迹有轨道电线、电缆被砸坏,应答器等设备损坏和水泥枕、扣件等被损坏等类型。此类案件的勘查分两个部分:一是宏观勘查。在掌握受损动车的运营情况、发生发现经过等基本情况后,要对整列动车的前后机车、所有车厢进行全面的检查,确定哪些机车、车厢有破损、破损部位等情况,再把破损部位全面纳入微观勘查范围。二是微观勘查。对所有受损部位进行全面细致的勘查,从动车的一侧向另一侧详细记录受损的方向、位置、形态、大小,再进行全面的分析判断。

The cases of damaging MU train floor and high-speed railway have such characteristics as： there＇s a long time between the case＇s happening and being found;it is difficult to investigate;tracks are easy to form;foreign matters are easy to be found;etc.MU train floor tracks have some types,like single-strip scrapes,multiple-strip scrapes,sheeted irregular cracks,etc.High-speed railway damage tracks may happen on railway wire,cable,equipment,cement sleeper,etc.The investigation of these cases can be divided into two parts： one is macroscopic investigation,ie,to exam thoroughly the two end engins and all cars after learning of the basic information of the damage so as to decide the damage positions;another part is microscopic investigation,ie,to exam intensively all damage positions and write down a detailed record about the direction,place,form,and size of the damage,and then make a comprehensive analysis.