In this paper, the structure feature and principle of this special drill has been introduced. Its special design is very useful for drilling thin-wallpipe.
本文介绍了薄壁管专用钻头的结构特点及工作原理,其结构设计新颖,对薄壁管的钻削有实用价值。
2
Thin-wallPipe Pile Using Cast-in-situ Concrete (named PCC) technology and the application in soil improvement of Shanghai Beihuan express way are introduced.
本文介绍了现浇混凝土薄壁管桩技术及其在上海北环高速公路软基加固中应用。
3
The three-dimensional effects of pile head and applicability of plane-section assumption are main problems in low strain dynamic tests on cast-in-situ concrete thin-wallpipe piles.