| 摘要 |
<p>Tubbing element (10) for lining excavations of circular shape, constituted by one or more structural steel(s) whose flanges (12) are provided with slots (13) of long shape in order to connect adjacent elements. In the transverse direction, stiffening elements (14) are provided which, in case the tubbing is accomplished by coupling a plurality of structural steels, also perform the function of connection and fastening.</p> |
