论文部分内容阅读
在桥梁施工中，往往采用三角网控制，三角阿两条基线一般设在河流的一岸或者两岸，并要求基线设在易于丈量且通视的地方，如果两岸有房屋、树木密集或者地势高低悬殊，视线不通，采用一般的方法来布设三角网基线会带来很多困难，不仅增大工程费用，而且施工速度受影响，提出采用跨河基线布设三角网。通过象州大桥和柳城大桥采用跨河基线法作为大桥平面控制测量，测量结果，墩台位置误差均在１．０ｃｍ以下，达到了技术规范的要求。
Triangle network control is often used in bridge construction. The two triangles of the triangle are generally located on one bank or both banks of the river and require that the baseline be set at a place that is easy to measure and communicate with. If there are houses on both sides of the strait, the trees are dense or the topographic disparity , The line of sight barrier, using the general method of laying the triangle network will bring many difficulties, not only increase the project cost, but also affect the construction speed, the proposed deployment of triangular network across the river baseline. The Xiang River Bridge and Liucheng Bridge adopt the river crossing baseline method as the plane control measurement of the bridge. The measurement results show that the position error of the pier and the abutment is below 1.0 cm, which meets the technical specifications.