6 桩号 弧长 li?HZ里程-桩点里程21 偏角 1?li???i???0 ??3?LS?220 方位角 ?c??32??ii06 弦长 ci?li?li590R2L2S480 Xi .018 Yi （4）第二缓和段坐标计算 ?0?7?38?22??
(左转) YH: 2 32 261 39.9640457.91359.K2+2640 47 03 24 8 480 018 3.998 +280 23.998 0 55 259 223.9940459.91374.00 5 37 6 290 911 0 01 258 40462.91394.+300 3.998 32 30 37 3.998 897 582 ? HZ K2+30 258 40463.693 91398.500 3.998 30 37 32 Xi?XHZ?cicos?ci Yi?YHZ?cisin?ci
方法二：切线支距法（坐标系转换）
（2）第一缓和段坐标计算
?12?160?48?03??
Xi?XZH?xcos?12?ysin?12
Yi?YZH?xsin?12?ycos?12（本题为左转曲线）
l3l7 y??336RLS336RLS桩号 l5 li?桩点里程-ZY里程 x?l?40R2L2sXi Yi ZH: 0 K2+048.562 11.438 11.438 +060 31.438 31.417 +080 HY 39.929 40 K2+088.562 （3）圆曲线段坐标计算
0.042 0.863 1.778 40576.543 91200.2 91204.040565.755 40547.156 92211.440539.419 91215.1
?0?7?38?22?? p = 0.444m q = 19.988m ?12?160?48?03?? ZH（40576.543 , 91200.296）
Xi?XZH?xcos?12?ysin?12桩号 HY: K2+088.562 +100 li?桩点里程-HY里程 Y?Y?xsin? ??? x?Rsin??q iZH12?ycos?12?180?li?R0PyP?R?1?cos??p ? Xi 11.438 40539.419 912+120 31.438 +140 51.438 +160 71.438 QZ: K2+176.280 87.718 +180 +200 +220 +240 +260 91.438 111.438 131.438 151.438 171.438 12 00 51.196 3.726 40529.419 91230 19 38 70.424 9.177 40513.052 91252 27 17 14 34 55 36 41 08 118.684 37.487 40476.788 91243 42 33 58
YH:K2+263.998 74 175.436 39 164.638 110.740 40457.479 91304
（4）第二缓和段坐标计算
?12?78?30?37??
Xi?XHZ?xcos?23?ysin?23
Yi?YHZ?xsin?23?ycos?23（本题为左转曲
l3l7 y??336RLS336RLS线）
桩号 l5 li?桩点里程-ZY里程 x?l?40R2L2sXi Yi YH: K2+263.998 40 39.929 +280 23.998 23.992 +300 3.998 3.998 HZ K2+303.998
1.778 0.384 0.002 40457.482 91359.0140459.290 91374.9140462.898 91394.5840463.693 91398.500
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