南昌大学前湖校区体育馆施工测量控制技术

Construction Survey Control Technology of Qianhu Campus'S tadium of Nanchang University

江西省南昌大学前湖校区体育馆拥有国内最大跨度的非预应力混凝土桁架。针对该桁架跨度大,呈弧形、V形布置,并且标高变化多等特点,施工过程中首层采用在桁架内侧作轴线借一米线处布设内控点的内控法、首层以上采用激光垂准仪内控接力的传递法进行桁架四个面的平面控制定位;通过采用弦距法进行大跨度弧形桁架下弦杆拱高计算所得到的数据,对体育馆桁架下弦模板支护进行标高控制测量定位,取得了较好的施工精度和效果。

Nanchang University Qianhu Campus＇ Stadium in Jiangxi province has the longest span of non-prestress concrote truss, which has features of arc shape, V-shape layout and changeable elevation. The inner-controlling method and chord distance method are used to control the position of axes and the arch height in Nanchang University Qianhu Campus＇ Staditun. During construction, inner-controlling points are set on the Ira-distance inner side of truss axes on the first floor, while using chord distance method the height of segment of miss is calculated to help controlling elevation of stadium tress on the other floor. All of these methods are pragmatic to control the axes and the height.