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| Control of Destablization Disaster of Typical Cutting Slope in Permafrost Region |
| ZHAO X iang-qing1, XIONG Zhi-wen1, HAN Long-wu2, YANG Yong-peng2 |
| 1.ChinaAcademy ofRailway Sciences, Beijing 100081, China; 2.NorthwestResearch Institute ofCREC, Lanzhou,Gansu 730000, China |
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Abstract Research purposes:W ith the developmentof thewestern China, theQinghai-TibetRailway has been built onQinghai-TibetPlateau, and the Qinghai-TibetHighway is now under reconstruction. They all cross the 550 km long permafrostregion. Based on the investigation, thispaperanalyzes the problems related to the subgrade ofQinghai- TibetRailway built in 2001~2002, especially the road cutting problem.
Research conclusions:Focusing on the seriously default sections of K 1 115 and K 1 128 judged as the artificial permafrost table, the analyses of the stability of the cutting slope is made in combination with the investigated hydrogeology information made in Apri,l 2008 and the special environment in permafrost region, the reasons for the subgrade problems are pointed outand the protectionmeasures are presented based on the lab tests and testequations for frozen soi.l
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Received: 12 June 2008
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2009, Vol. 26 
