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安西至嘉峪关一级公路建于河西走廊西部的戈壁地区。为了预测和防止公路建成后风沙活动对公路本身以及对行车安全带来的危害,基于野外调查、风况资料的整理分析和实地风沙观测,对公路沿线的风沙危害程度进行了评价。研究结果表明:①研究区绝大部分区域地貌为沙砾质戈壁,在戈壁面保持稳定的情况下不易起沙,而已退化的灌丛沙堆是造成公路风沙危害的直接沙源;②起沙风的风向在安西县主要为东风,而在玉门市西风为优势风。研究区沙源和优势风向的确定为安嘉公路风沙危害防护体系的建立奠定了基础。
Anxi to Jiayuguan highway was built in the western Hexi Corridor Gobi area. In order to predict and prevent the harm of sand-blown activities on the highway itself and the traffic safety after the completion of the highway, the hazard degree of wind and sand along the highway was evaluated based on the field investigation, the wind and wind data analysis and the field wind and sand observation. The results show that: ① The geomorphology of gravel in most of the study area is not gritty when the Gobi is stable, while the degraded shrubbery sand is the direct source of sand damage caused by highway wind and sand; The wind direction in Anxi County is mainly the east wind, while the west wind in Yumen City is the dominant wind. The determination of sand source and dominant wind direction in the study area laid the foundation for the establishment of wind and sand hazard protection system in Anjia Highway.