【判断题】
切割钢轨时要用电锯全断面锯轨,并使轨顶面与轨头断面垂直,钻眼时要倒棱
A. 对
B. 错
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换轨段为混凝土枕时,应按规定拆卸扣件及接头夹板。拆卸完应整体摆放到相应位置
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【判断题】
换轨时,轨下大胶垫不得缺少,压溃或缺损的不用换掉
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【判断题】
换轨段为混凝土枕时,应按规定拆卸扣件及接头夹板
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【判断题】
钢轨接头错牙不得超过2㎜
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轨道线路的三大薄弱环节为:道岔、曲线、接头
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接头通常面临的问题是:错牙,松动,轨缝过大,瞎缝,螺栓用力不均等
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普通钢轨接头鱼尾板安装作业时应在施工区域前后50m设置红闪灯,进行线路封锁
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B. 错
【判断题】
普通钢轨接头鱼尾板安装前应将润滑油脂涂在钢轨接头和轨头表面
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1安装鱼尾板时应逐个的拧紧单个螺栓
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普通钢轨接头鱼尾板螺栓扭一般需要达到400-500N.m
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更换铁垫板时,不同轨底坡的铁垫板可混合使用
A. 对
B. 错
【判断题】
更换铁垫板时,更换的铁垫板要与既有的钢轨类型一致
A. 对
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【判断题】
测量轨距时,将轨距尺的固定端紧贴一条钢轨的工作边,另一端放置在另一股钢轨工作边上,并左右移动,直至到最小间距,此时刻度就是准确轨距值
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轨距尺垂直线路中心线架设在钢轨顶面,读取水平尺的气泡靠近末端相对应的值则为准确水平值
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轨道巡视的最终目标为维持一个既安全又可靠的地铁列车服务
A. 对
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正线开通初期3个月内每24小时巡查一遍
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人工巡道的周期间隔不应超过72小时
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车辆段、停车场所有线路每周巡查2遍
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巡道时应以3km/h左右的速度全面查看线路、道岔
A. 对
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【判断题】
巡查时如线路、道岔发生影响行车故障,应立即排查处理并按汇报制度规定向上汇报
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轨道伤损检查作业的目的为钢轨伤损检查提供指导
A. 对
B. 错
【判断题】
当钢轨伤损被发现,检查及评估对地铁列车行驶安全的影响后,会帮助及时更换、临时维修、定期检查伤损情况以便日后做出更换的决定
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线路巡查人员巡经伤损钢轨时,要小心检视,比对伤损的资料,如发现有伤损发展情况,根据钢轨伤损现场标记规定用油漆进行标记,且必须立即通知线路工班长
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【判断题】
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【判断题】
起道地段要有足够的道砟,全面起道,起道量超过40mm时一般应用仪器测量并设置起道标桩,按标桩起道
A. 对
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【判断题】
道岔全面起道时,按计划标好起道量,看道与指挥起道,起道可分为转辙部分、连接部分、辙叉部分、叉后长轨部分
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道岔改道作业可以按照转辙部分,连接部分,辙叉部分分段进行
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测量曲线正矢时,弦线不用拉紧,弦线的两端位置和量尺位置要正确
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正矢用20m弦在钢轨踏面下16mm处测量
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起道是将线路低洼处所起高,以找平轨面、改善道床弹性
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起道分重起和全起两种,是养路工作中技术要求较高的作业
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起道时看道者俯身在标准股上,距起道机20~30m处,看轨头外侧下颚水平线,找出坑洼,指挥起道机放置位置和起道高度
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拿起道机的人,要密切注视看道者的指挥,正确的放置起道机,动作要敏捷
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拨道时直线地段如两股方向误差不大时,一般以顺里程方向的左股为基准股;如一股方向好,则以方向较好的一股为基准股,曲线地段应以上股为基准股
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拨道量大或道床特别坚实时,应在拨道前将轨枕头外的道砟挖开一些,当拨量大于20mm时还需要先进行荒拨
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拨道量不大时,用镐尖将轨枕头外的道砟刨松即可。曲线上有鹅头时,应先将鹅头消除
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曲线拨道,一般应由曲线两端向中间拨
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