《道路勘测设计》课件-3-10CAD绘制道路纵断面图

道路勘测设计CAD绘制道路纵断面图道路纵断面图绘图步骤测量数据准备与处理CAD绘制道路纵断面图演示测量数据准备桩号地面高程平曲线交点桩号曲线长度偏角K1+000639.7JD136K12+31.3230左20640.3JD137K12+9135右31.32640.59JD138K12+143.2726左47.18641.39JD139K12+197.3540右60642JD140K12+30030左73.5642.55JD141K12+387.9845左91642.93

100642.93

已知：桩号和对应的地面高程，相应的平曲线要素，请绘制纵断面图，按交通四级重丘区标准设计该段线路的纵断面图。横向比例1：2000，纵向比例1：200。用A3图纸出图。108.5642.93130.12642.57143.27642.32156.42642.69177.57643.79187.61644.42197.35645207.69645.64217.73646.08240647.48260648.26285.63648.2300648.27312.45648.35330648.37350647.04365646.3377.87645.62387.98645.07400644.41408.2643.86430642.45450642.18470642.27K1+490642.54一、测量数据准备道路纵断面图设计的地面高程测量数据准备和平曲线要素准备，如右图所示。数据分析：该段路线从桩号K1+000到K1+490，长度为490m。地面高程的最大值为648.37m，最小值为639.7m，高差为8.67m。每20米一个桩号。按照横向比例1：2000，纵向比例1：200的比例尺，该段路线长度应为245mm，高差为43.35mm。每20m的路线长度为10mm，高差1m的高度为5mm。平曲线的交点有6个，说明有6个弯道。道路等级为：四级（重丘区），对应的设计速度为20Km/h。纵坡设计时应选择对应的参数。测量数据处理二、测量数据处理通过Excel把测量数据进行处理。1、将桩号按1：2000的比例尺进行换算，如20m桩换算成距离起点10mm；100m桩换算成距离起点50mm。2、将地面高程按1：200的比例尺进行换算。如642m换算成20mm。【（642-638）/200=0.02m，638m为标尺的起始值。】3、通过坐标公式得到换算坐标，就可以进行地面线的绘制。桩号桩号换算值（mm）地面高程（m）起始值（m）高差（m）换算值（mm）换算坐标00639.76381.78.50,8.52010640.36382.311.510,11.531.3215.66640.596382.5912.9515.66,12.9547.1823.59641.396383.3916.9523.59,16.95603064263842030,2073.536.75642.556384.5522.7536.75,22.759145.5642.936384.9324.6545.5,24.6510050642.936384.9324.6550,24.65108.554.25642.936384.9324.6554.25,24.65130.1265.06642.576384.5722.8565.06,22.85143.2771.635642.326384.3221.671.635,21.6156.4278.21642.696384.6923.4578.21,23.45177.5788.785643.796385.7928.9588.785,28.95187.6193.805644.426386.4232.193.805,32.1197.3598.67564563873598.675,35207.69103.845645.646387.6438.2103.845,38.2217.73108.865646.086388.0840.4108.865,40.4240120647.486389.4847.4120,47.4260130648.2663810.2651.3130,51.3285.63142.815648.263810.251142.815,51300150648.2763810.2751.35150,51.35312.45156.225648.3563810.3551.75156.225,51.75330165648.3763810.3751.85165,51.85350175647.046389.0445.2175,45.2365182.5646.36388.341.5182.5,41.5377.87188.935645.626387.6238.1188.935,38.1387.98193.99645.076387.0735.35193.99,35.35400200644.416386.4132.05200,32.05408.2204.1643.866385.8629.3204.1,29.3430215642.456384.4522.25215,22.25450225642.186384.1820.9225,20.9470235642.276384.2721.35235,21.35490245642.