The roof box

Development of the Push-Pull Type Removable Roof Box Cars

推拉式活顶棚车的研制

Force characteristics of the basement roof using thin-walled box of cast high-rise buildings and hollow plate embedded solid parts of the upper structure of great significance .

因此，对地下室顶板采用薄壁箱体现浇混凝土空心板的高层建筑的受力特性以及空心板作为上部结构嵌固部位的研究就具有重大的意义。

The tunnel of Shanghai Middle Ring Line is carried out by the pipe roof culvert box advancing scheme .

上海市中环线北虹路地道工程，采用管幕&箱涵推进工法施工。

Expounded in this paper are the development process , main technical parameters , structure , performance features and testing of the removable roof box cars .

阐述了活顶棚车的研制过程、主要技术参数、结构性能及试验情况。

In the actual operation process , the phenomenon that the box subjected to eccentric load cracks is very common , especially for the roof box , longitudinal cracking is very common .

在实际运营过程当中，箱梁受偏心荷载作用而产生开裂的现象非常普遍，特别对于箱梁顶板，纵向开裂的现象十分常见。