400m大跨度轴线精度控制方法

ACCURACY CONTROL METHOD FOR 400M LARGE-SPAN AXIAL LINE

国家会议中心二期主体结构南北长达456m,施工中保证大跨度轴线的测量精度十分重要,为此通过将大跨度轴线分段,应用后方交会的方法进轴线投测,保证了轴线的测设精度。

The main structure of China National Conference Center Phase Ⅱ is as long as 456 m from south to north,so it is very important to guarantee the large-span axial measurement accuracy.Therefore,the large-span axial line was divided and backward intersection method was adopted for the axial line measurement,to guarantee the measurement accuracy of the axial line.