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| WORK OUT CONSTRUCTION TECHNOLOGY SCHEMES FOR MULTI-YEAR TUNDRA OF QING-ZANG RAILWAY |
| WANG Jin-kuan |
| China Railway Fifth Engineering Bureau Group Company |
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Abstract The Qing-Zang Railway should be constructed passing through 550 km multi-year tundra ,including the Kunlunshan Tunnel which is the longest tunnel with frozen soil in the whole railway line. Due to the wide range of the tundra，the construction works arc very difficult and the construction technologies are very complex. Different design principles may be adopted according to different degree of stability of the tundre. The paper expounds several design principles，research and work out several construction schemes concerned with the construction of subgrade，bridge and culvert，tunnel, etc.
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Received: 26 May 2002
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2002, Vol. 19 
