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The blown sand disaster to the Tarim Desert highway in Xinjiang, China

Science China Earth Sciences 2002年第Z1期45卷 165-173页

作者：雷加强王雪芹王德周长海夏训诚 Cold and Arid Region Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China

The Tarim Desert highway in Xinjiang, China, the longest one in the world, has a lengthof 562 km, about 80% of which runs across, from north to south, the Taklimakan Desert. Obviously,the main problem of the road maintenance is the blown sand disaster. The research resultsshowed: (1) the physical environment along thedesert highway is characterized by strong winds,fine and loose ground materials, different dunes and so on, which provides the dynamical conditionand material source for the formation of blown sand disaster to the road and its shelter ***, the trend and cross-section of the road and the structure of the shelter system, asdamage objects, play important roles in the formation process of blown sand disaster; (2) theblown sand disaster to the shelter system is original from the intrusion of the drift sands and mobiledunes outside the shelter system, and the wind erosion and sand deposit caused by the air streamchanges on the ground in the shelter system. The main damage object in the Tarim Desert High-way is the shelter system presently. The damage forms include wind erosion, sand burying anddune covering; and (3) the damaged length of the blocking sand fences is 83.7%, 88.4%, 72.4%,72.8% and 40.3% and the damaged area of the straw checkerboard belts is 73.1%, 58.2%, 44.5%,35.4% and 36.6%, in turn, in 5 different landform units from north to south, and, the disasters tofences and the straw checkerboard belts are 79.5% and 57.6% in the compound dunes while theyare 64.6% and 37.7% in the interdunes respectively.

关键词： desert highway, blown sand disaster, shelter system.

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Structures of subgrade/pavement and construction techniques for the Taklimakan Desert highway

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Science China Earth Sciences 2002年第Z1期45卷 115-124页

作者：李志农金昌宁 Xinjiang High Grade highway Administration Bureau Urumqi 830001 China Xinjiang Communication Scientific Research Institute Urumqi 830000 China

With lots of indoor and outdoor experiments, several key technical issues in construc-tion of the Desert highway have been solved satisfactorily, on the basis of great achievements ofthe studies in respects of dry compaction on sand base, design parameters, structure combinationof subgrade and pavement, stabilization analysis of sand base strengthened with geotextile and acomplete set of construction techniques. It is the first time the achievements of the study weresuccessfully applied in the Taklimakan Desert where the natural condition is extremely harsh. Ithas been proved that it is economic and reasonable with reliable techniques and simple construc-tion methods. The Desert highway constructed with the achievements is the first-grade highwayrunning through huge migratory desert for long distance in the world.

关键词： Desert highway, anemoarenyte, geotextile, dry compaction, subgrade/pavement, Taklimakan.

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