| 摘要 |
<p>A tunnel lining comprises a plurality of arcuate segments (10a, 10b, 10c) connected to one another by connecting elements (18-21). Each connecting element protrudes from one segment and engages in a recess defined by an adjacent segment. Each recess is considerably larger than the connecting element and contains means (31) for clamping the connecting element to one wall of the recess. </p> |
