| 摘要 |
<p>A concrete track (3) for release of a concrete tunnel body (2) is first made within a closable space of a graven dock lod (1). A sliding steel mold is put up and a first segment of the tunnel body (2) is concreted on the concrete track (3). The steel mold is then successively shifted along the concrete track (3) under simultaneous concreting other follow-up segments i.e. the tunnel body (2). The tunnel body (2) finished in the whole required length is then sealed at its both ends. The graven dock lod (1) space, on the side of the watercourse (16), is then gradually opened to thereby causing flooding of the graven dock lod (1) space until the tunnel body (2) submerges completely. Subsequently the tunnel body (2) is successively extended along the flooded concrete track (1), i.e. its front end reaches end position of the extension in the region of the watercourse (16) opposite shore. In this position, the tunnel body (2) is seated or secured. After opening and flooding the graven dock lod (1) space, the tunnel body (2) front portion rises above the concrete track (3) level while the rear portion thereof is then brought into sliding contact with the concrete track (3) in the direction of the watercourse (16) opposite shore. Prior closing both ends of the tunnel body (2), rectifiably balancing elements (4), such as water tanks, are put in the tunnel body (2) interior within the graven dock lod (1) space. Apparatus with a sliding steel mold comprises a towing attachment having a tow suspension (9) with cables having individually anchored their ends in towing units (14) in the region of the watercourse (16) opposite shore.</p> |
