It reduces the construction difficult, releases the dead load of pulling bar and steel suspension box and saves material.
降低了施工难度，又减轻了拉杆及钢吊箱的自重，节约材料。
The author also introduces the arrangement rules of pulling bar, checking computations of shell and pulling bar system at the construction stage and assembly...
重点介绍了拔杆的布置原则，施工阶段网壳和拔杆系统的验算及网壳的拼装与提升等过程。
The invention uses the matching of telescopic drawer-bracket and the pulling bar, achieves the purpose of swift installation of steel suspension box pulling bar;
本发明采用可伸缩抽屉式牛腿及拉杆相配合使用，实现了钢吊箱拉杆快 速安装的目的；
Based on the structural characteristics and site conditions, low level spread assembly and pulling bar group relay lifting method is adopted to install the shell.
施工中针对网壳结构特点及现场施工条件，采用低空外扩拼装、拔杆群接力提升的方法完成了安装。
The pressure safety devices can help to retain the draw bar pulling force in the event of a breakdown of the hydraulic system.
安全阀可以防止因液压系统故障等原因而引起的油缸输出推（拉）力急骤下降，可确保加工安全。
For the thin-walled pier and the vase pier, the paper proposed a model of Y-shaped pier with a bar on the pier-top and put forward a simplified formula for the pulling force on the pier-top.
针对薄壁墩、花瓶墩等结构，提出墩顶带拉杆的Y形墩模型，给出了墩顶拉力的简化计算公式。
For the thin-walled pier and the vase pier, the paper proposed a model of Y-shaped pier with a bar on the pier-top and put forward a simplified formula for the pulling force on the pier-top.
针对薄壁墩、花瓶墩等结构，提出墩顶带拉杆的Y形墩模型，给出了墩顶拉力的简化计算公式。
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