论文部分内容阅读
三角坑是线路上存在的主要病害之一。本文从三角坑的定义出发,详细地闸述了一般情况下如何分析三角坑,在特殊情况下如何分析三角坑。一般情况是指在标准轨线路上检查时,标准股没有变更的情况下,按照三角坑的定义,即在18米范围内有三点水平误差符号交替变化,出现“正负正”或“负正负”的情况下出现的三角坑。在特殊情况下,一是指非标准轨地段除分析三点三角坑外,还要分析四点三角坑;二是指在检查中变更基本股时,在变更点前后三点水平误差出现的“正正负”或“负负正”情况下出现的三角坑;三是指在道岔上检查时出现的三角坑,这种情况比较复杂,即使定出分析方法,也不易被掌握。本文认为在道岔上不分析三角坑,但应将道岔水平允许误差值定在±3毫米,这样如果水平误差不超限,三角坑也就不存在了。
Triangle pit is one of the major diseases on the line. Based on the definition of triangular pits, this article elaborates on how to analyze the triangular pits in general and how to analyze the triangular pits under special circumstances. Generally refers to the standard track line inspection, the standard unit has not changed circumstances, in accordance with the definition of triangular pit, that is, within 18 meters range of three horizontal error symbols alternately change, there are “positive and negative positive” or “negative Triangle pit appeared in the case of ”negative“. In exceptional circumstances, one refers to the non-standard sections in addition to the analysis of the triangular pits, but also analysis of the triangular pits; the second refers to the change in the inspection of the basic unit, the change point before and after the three-point horizontal error of ” Triangle pits in the case of “positive and negative” or “negative and negative positive”; third refers to the triangular pits that appear on the turnout during inspection; this situation is rather complicated and difficult to grasp even if the analytical method is set. This paper argues that the triangle pit is not analyzed on the turnout, but the allowable error of the turnout level should be set at ± 3 mm so that the triangular pits do not exist if the horizontal error does not exceed the limit.