1、将全站仪架设在便于观测墩柱的位置,对好后视。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/4e4a20a4462309f72dc2e8157d0e0cf3d7cad60c?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、用棱镜十字丝的竖直线卡墩柱的两侧边缘,取得两个方位角读数a和b
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/0d338744ebf81a4c9fdeb6ced82a6059242da6cd?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、将两个方位角读数取平均数c=(a+b)/2,然后将全站仪方位角拨到读数为c的位置,用免棱镜测出距离d。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/faedab64034f78f0813edef476310a55b3191cfb?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、查阅立柱设计文件,得到立柱半径e(立柱模板一般都是定制钢模,截面误差可以忽略不计),e+d得到测站点到立柱中心的距离
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/63d0f703918fa0ecb8c8210a299759ee3d6ddbae?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
5、现在有测站坐标、e+d、方位角c三个已知条件,就可以推算出立柱的实际中心坐标了 X=COS C *(E+D)+X测站;Y=SIN C*(E+D)+Y测站;当然用cad图解也可以。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/a686c9177f3e6709f6ee1ff834c79f3df9dc55ce?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)