1、毕业论文题目:曲线的整治方法姓名: 工作单位:信阳工务段日 期: 2013年10月概述 本人所在工区是一个多弯道,小半径曲线居多的的工区,由于钢轨磨耗较大,造成圆曲线正矢偏差较大,几何尺寸出现超限的情况。而随着铁路不断向着科学化管理的迈进,安全成为铁路运输的首要,为全面提高线路设备质量管理,确保列车安全平稳的运行,就必须对线路病害进行分析,而曲线是铁路线路的薄弱环节,由于受到离心力的作用,致使两股钢轨受力不均。而产生非正常磨耗,同时曲线又是病害集中,轨道几何尺寸易超限,设备状态不易控制,养护维修工作量相对较大,病害达到一定值时,对列车的运行将会造成很大的影响,针对现埸的实际情况,只有想尽一切办
2、法,对小半径曲线进行着各种各样的加强防范措施,千方百计的控制小半径曲线的状态,延长小半径曲线维修周期,降低小半径曲线维修成本。经常摸索自己管内曲线变化规律,做好曲线苗头性病害的预防工作,可起到事半功倍的效果,日常养护中注意摸索每条曲线及曲线各部分变化周期,有计划的进行预防性修理,可减少维修工作量,而且可以避免曲线状态的恶化。而要做到这一点,就必须学会分析病害形成的原因,懂得去整治病害。找到预防病害的方法。 曲线病害形成的原因主要有很多方面,而针对工区的实际养护情况来说,有如下几点: 一, 由于养护维修不当和不及时,容易造成路基积水,翻浆冒泥,下沉等级现象,引起线路路基变化,造成曲线正矢,水平,
3、高低也相应发生变化。 二, 拔道方法不当,由于现埸一般采用目测拔道法。不结合水平高低的整治而采取单纯拨道的办法,拨正时强压使轨缝顶密后发生弹性恢复;拨正前没有扒开拨正前方的道碴,拨正后没有及时捣实另一边轨枕的间隙;以及不及时回填夯拍道床,同时为了减小拔道量而长期向曲线上股拔道,使用简易方法计算拨道,由曲线中间向两边拨道;破坏曲线头尾的正确位置,造成曲线头尾出现“鹅头”。 三, 养护不当不及时。没有结合水平高低的整治而采用单纯拔道方法,起拔道时,在放置压机时,位置不当也会引起方向不良使曲线不能保持圆顺状态或造成高低水平的变化。在平时的养护中。对扣件,轨道加强设备养护不到位而失效都有可能导致曲线的
4、变化。同时道床的不洁也会造成方向水良与轨距普遍性的病害。 四,线路养护不当。超高或轨底坡不合适;轨距变化率较大;容易造成钢轨的非正常磨耗,同样,线路养护不当。超高或轨底坡不合适;轨距变化率较大;容易造成钢轨的非正常磨耗。养护不良造成钢轨磨耗。曲线不圆顺、方向不良、使列车通过时加剧蛇行运动,这也会加速钢轨磨耗。轨距超限、轨距不顺,使车轮与钢轨的内接情况不好,增加行车阻力与摇晃,加速钢轨磨耗。缓和曲线超高的递减距离不够,引起列车在通过缓和曲线时产生剧烈振动,加速摇晃和冲击,造成钢轨非正常磨耗。曲线地段的暗坑,吊板,翻浆冒泥,引起列车通过时产生不正常的轮轨冲击,产生不正常的磨耗。而钢轨的非正常磨耗加
5、剧轮轨的振动同样对线路几何尺寸的超限,轨枕,扣件及设备的养护形成很大的破坏。造成越来越大的恶性循环 。 曲线病害的预防法 一, 保持曲线正矢不超限,定期调查现场正矢,细心计算,全面拨正。特别是保持曲线头尾的圆顺。对于曲线“鹅头”、等病害要及时整治。要做好和缓和曲线超高顺坡和正矢的递减等量进行,不要忽大忽小。 二.合理设置曲线外轨的超高。超高过大会加剧外股钢轨的侧面磨耗和内股钢轨的垂直磨耗。相反如超高过小,对外股钢轨磨耗也不利。 三 .加强养护,保证线路排水畅通,道床清洁饱满。经常保持曲线状态良好,保持方向圆顺,轨面平,轨距水平不超限是减少列车的摇晃,减少车轮冲击力的有效措施之一。因此,应定期拨
6、道,经常养护,预防病害的发生。 四 .同时在养护工作中,调整轨底坡, 更换和补充失效零部件。加强轨距整改,轨距变化率达标。改道与曲线正矢整治相结合,以曲线上股为基准股,曲线正矢与计划正矢的误差控 制在2mm范围内,在保证曲线正矢及上股曲线圆顺的基础上改曲线下股轨距。对曲线内焊缝结合打磨作用边改正轨距,对硬弯轨道进行全面直轨。 对拨道后方向易发生变化所, 加强曲线扣件复紧,使扣压力符合要求。 总的来说,曲线是铁路的薄弱环节,必须坚持预防为主,防治结合的原则,提高人的素质,坚持各单项作业标准化是必备的主要条件,提高认识,在思想上必须重视它,采取各种预防措施,尽最大可能地延缓病害的发生,及时有效地实
7、施综合整手段,才能使病害得到控制。我们的预防和整治工作,只有靠平时作业中的认认真真,定期进行绳正法拨道,认真总结经验,努力学习,坚持终身学习,才能把曲线病害的预防和整治工作做好,也才能真正的使列车安全、高速、平稳和不间断地运行 9JWKffwvG#tYM*Jg&6a*CZ7H$dq8KqqfHVZFedswSyXTy#&QA9wkxFyeQ!djs#XuyUP2kNXpRWXmA&UE9aQGn8xp$R#͑GxGjqv$UE9wEwZ#QcUE%&qYpEh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3tnGK8!z89AmYWpazadNu#KN&MuWFA
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