In light of engineering practice, a round steel sheet pile cofferdam was used in the main tower caps and the construction of pile cap was successfully completed.
结合工程实际，主塔承台采用圆形钢板桩围堰施工，圆满完成了承台的施工。
During cantilever construction of CCTV main building, high frequency, high precision and multi-point dynamic monitoring is used in tower crane displacement installation and usage.
CCTV主楼悬臂施工阶段，对塔式起重机在移位安装至悬臂部位过程中和使用状态下进行高频次、高精度、多点位动态监测。
The observation results show that the building up of the beam model provided exact data for the construction control, which can ensure that the main tower construction finished successfully.
监测结果表明，该模型的建立为桥塔的施工监控提供了准确的数据，保证了主塔施工的顺利完成。
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