| 摘要 |
<p>The hollow structure is of large cross-section e.g. a conduit or silo, which rests on the ground. The optimum shape of cross-section is calculated, taking into account the site conditions, the operational conditions and the intrinsic properties of the conduit material. The shape of cross-section is roughly semi-circular with rounded corners, having a width (L) and a height (H). The shape is constructed from separate pieces (3-5) which are welded together to form lengths of conduit which are then joined end to end.</p> |
