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在桥墩台施工中,由于测量仪器少,又不能用中綫法直接丈量出墩位的情况下;在多墩台同时施工,全桥开工前已有精确的定位测量,墩台基础已多个做好,准备继續向上灌注的立模定位中,仅用一台經緯仪,采用后方交会解析法定位是极便利的。我们曾用此法解决了仪器不足的困难,使大量桥梁同时开工。其测設方法介紹如下。一、如何将仪器放在桥梁中綫上在某个墩上,大致找出顶面結构的中心,将經緯仪安放在此点上(仪器不一定在桥梁中綫上),瞄准己有的桥中心綫上两点(或两点以上,并已知两点間的精确
In the construction of piers and piers, due to the small measuring instruments, but also can not be measured directly by the median method of the pier position; in the simultaneous construction of multiple piers, the bridge has been accurate before the start of the positioning measurement, the pier has been more than one foundation to do Well, ready to continue upward perfusion of the vertical mold positioning, using only one theodolite, using the rear intersection resolution method is extremely convenient. We have used this method to solve the problem of insufficient equipment, so that a large number of bridges are started simultaneously. The measurement method described below. First, how to put the instrument on the middle of the bridge On a certain pier, roughly find the center of the top structure, place the theodolite at this point (the instrument does not have to be on the middle of the bridge), and aim at the existing bridge centerline On the two points (or more than two points, and known between the exact point