敦煌-格尔木铁路高大沙丘区的风沙环境特征及风沙危害综合防护体系

新建敦煌-格尔木铁路途经库姆塔格沙漠东部的沙山沟,沟内沙源非常丰富,高大沙丘广布,其风沙危害对铁路造成了严重威胁。本研究选择党河上游流动沙丘和黑山嘴流动沙丘两个具有代表性的高大沙丘区域,系统调查与观测了该区域高大沙丘土壤水分、植被、风沙环境和风沙危害,在掌握和分析两试验区环境特征的基础上,在党河上游流动沙丘区建立以工程措施为主的风沙防治试验示范区,在黑山嘴流动沙丘区建立工程与生物相结合的风沙防治试验示范区。研究旨在取得敦煌-格尔木铁路途经高大沙丘区风沙防护的相关工程经验,合理确定风沙防治措施,为铁路通过该区的风沙防护提供了理论依据和实践参考,对保证敦煌-格尔木铁路安全畅通运营具有重要意义。

The Blown Sand Characteristics and Sand Hazards Comprehensive Protective System at the Sand Dune Areas along the Dun-Ge Railway

The new Dun-Ge railway passes through sand valley in the east of the Kumtag Desert, the sand source is very rich at the sand valley, the tall dunes are widespread distribution, the hazards of blown sand have caused a serious threat for railway. This study chose DangHe upstream flow sand dunes and Montenegro mouth flow sand dunes as two typical sand dune areas, the system of investigation and observation were carried out concerning the dune water content, vegetation, blown sand environment and hazard. Two sand control demonstration zones were set up in the Danghe River upstream and Montenegro Mouth flow sand dune area respectively on the basis of analyzing the environment characteristic of the two experimental zones. Research was aimed at obtaining the related engineering experience about blown sand protection at sand dune area of railway passing through, confirming reasonable sand prevention and control measures, and providing a theoretical basis and practical reference for the blown sand protection of the railway through the tall dunes area. This research is great significance to ensure railway safety operation.