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一、问题的产生关于道岔前后与曲线间插入直线段的长度是为了递减其相连接曲线的加宽。现行《铁路工程技术规范》第1—211条规定:“曲线轨距加宽的递减,应在缓和曲线全长范围内进行,递减率不得大于1‰;道岔附带曲线递减率不得大于3‰”。而现行《铁路工务规则》第34条却规定:“附带曲线头至辙叉跟端的直线段长度不得短于6米”。
First, the problem arises About the length of the insert straight line segment before and after the turnout and curve is to reduce the widening of its connection curve. Article 1-211 of the current “Technical Specifications for Railway Engineering” states: “The decrement of curve gauge widening shall be carried out within the full length of the mild curve, and the decreasing rate shall not be greater than 1 ‰; the decreasing rate of the incidental curve of the switch shall not exceed 3 ‰” . However, Article 34 of the existing Railway Works Rules stipulates: “The length of the straight line from the head of the curve to the frog point shall not be shorter than 6 meters.”