GNSS技术在平安金融中心项目的应用

发布时间：2018-09-06 06:54

【摘要】：在超高建筑的施工过程中,测量基准传递和垂直度的控制是建筑施工质量控制的重点之一,其测量精度、可靠性直接影响着整体工程的施工质量。在现阶段,超高层建筑平面传递的方法主要有激光铅直仪投点法和精密天顶基准法等,但是这两种传递方法在超高建筑的传递过程中,一是随着建筑总高度的升高,需要分段传递,造成误差积累;二是超高建筑在高空受复杂多变的外界环境的影响,结构的柔性摆动也会对控制点的竖向传递造成影响。因此随着建筑高度的增加,垂直度控制的难度越来越大。本文中初步探讨利用GNSS静态技术对超高建筑物传递的控制点进行校核,目前已经进行了4次观测,通过GNSS静态观测点数据与塔楼待验层的测点的理论坐标进行比较,最大偏差为23 mm,表明现场采用的激光铅直仪完全满足施工精度要求,也表明了GNSS在超高建筑基准传递的可行性。
[Abstract]:In the construction process of ultra-high building, the transmission of measurement datum and the control of perpendicularity are the key points of construction quality control. Its measuring precision and reliability directly affect the construction quality of the whole project. At the present stage, the main methods of plane transmission in super high-rise buildings include laser leveling method and precision zenith reference method. However, in the transmission process of super-high buildings, one is with the increase of total building height. It is necessary to transfer in sections, resulting in the accumulation of errors. Secondly, the flexible swing of the structure will also affect the vertical transmission of the control points, which is influenced by the complex and changeable external environment in the high altitude. Therefore, with the increase of building height, it is more and more difficult to control perpendicularity. In this paper, we preliminarily discuss the use of GNSS static technology to check the control points transferred by super-high buildings. At present, four observations have been carried out, and the theoretical coordinates of the data of GNSS static observation points are compared with the theoretical coordinates of the measured points of the tower to be inspected. The maximum deviation of 23 mm, indicates that the laser straightener used in the field fully meets the requirements of construction accuracy, and also shows the feasibility of GNSS transmission in ultra-high building datum.
【作者单位】：北京中建华海测绘科技有限公司;
【分类号】：TU198

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