曲线养护作业讲解.ppt

Evaluation only. Created with Aspose.Slides for .NET 4.0 Client Profile 17.1. Copyright 2004-2017Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 4.0 Client Profile 17.1. Copyright 2004-2017Aspose Pty Ltd. 、曲线轨道方向整正 常用整正曲线的方法有矢距法、偏角法和绳正 法 ()绳正法 即是利用曲线上正矢与曲线之间的关系,改正正矢 ,使之恢复原有的设计曲率,并通过相应的拨量,把 它拨正到原来的设计位置。 Evaluation only. ith Aspose slides for NET 4o client P Evaluation only. Created with Aspose Slides for NET 4.0 Client Profile 171 Copyright 2004 -2017 Aspose Pty Ltd  Evaluation only. Created with Aspose.Slides for .NET 4.0 Client Profile 17.1. Copyright 2004-2017Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 4.0 Client Profile 17.1. Copyright 2004-2017Aspose Pty Ltd. 1、整正计算前的准备工作一外业测量,量取现场 正矢 (1)一般10m一点划好标记和编出测点号测点应尽 量与直缓、缓圆、圆缓、缓直点重合 (2)弦线必须拉紧 (3)尺在下,弦在上,尺不要顶弦也不要离开。 (4)先整好直线后再量 (5)要注意线路两旁建筑物的限界要求 Evaluation only. ith Aspose slides for NET 4o client P Evaluation only. Created with Aspose Slides for NET 4.0 Client Profile 171 Copyright 2004 -2017 Aspose Pty Ltd  Evaluation only. Created with Aspose.Slides for .NET 4.0 Client Profile 17.1. Copyright 2004-2017Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 4.0 Client Profile 17.1. Copyright 2004-2017Aspose Pty Ltd. 在曲线上两点连一条直线,这条直线叫弦。弦 上任一点到曲线上的垂直距离叫做矢距,在中 央点的矢距叫做正矢 正矢 伦多 曲线正矢测量 Evaluation only. ith Aspose slides for NET 4o client P Evaluation only. Created with Aspose Slides for NET 4.0 Client Profile 171 Copyright 2004 -2017 Aspose Pty Ltd  Evaluation only. Created with Aspose.Slides for .NET 4.0 Client Profile 17.1. Copyright 2004-2017Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 4.0 Client Profile 17.1. Copyright 2004-2017Aspose Pty Ltd. 当实测正矢与计划正矢之间的差值超过下表 所列的数值时,应及时整正 曲线正矢经常保养容许偏差规定值 缓和曲线的正矢与圆曲线正矢连续差圆曲线正矢最大 曲线径R[计算正矢差mm 最小值差(mm) 正线及其他正线及其他 线及其他 到发线站线到发线站线到发线站线 250R350 350R450 7654 450R≤800 765 12 R800 Evaluation only. ith Aspose slides for NET 4o client P Evaluatio