| 摘要 |
<p>Method of railway track renewal in an underground tube by replacing a long part of the track by a temporary auxiliary track or bridging construction (2) such that said auxiliary track becomes part of the course of the original track and the train traffic can remain its normal route. The bridge (2) comprises two parallel rigid longitudinal beams (3) between temporary rails (5) and in length adjustable cross beams (4), such that the mutual spacing between beams (3) and rails (5) can be adjusted. The bridge also has the (negative) conductor rail (6) and longitudinal beams (7) parallel to beams (3) and supports (8), having an adjustible length. Bridge(2) behaves like a unitary object.</p> |
