摘要
沙漠公路交通安全受到风沙流的显著影响,因此,采取有效的治沙措施至关重要。文章通过倾斜摄影技术对沙漠公路的防沙设施进行了详细观测,并对其失效性进行了深入分析。研究结果表明:(1)风力作用是导致防沙设施失效的主要原因,一方面,沙丘移动导致草方格、阻沙栅栏等防沙设施被全埋或半埋;另一方面,风力的影响导致防沙设施被掏蚀或倾覆。在老化失效方面,草方格在短期内比尼龙网更易老化,从而失效。(2)沙丘地形的防沙设施比平坦地形更易失效,其主要原因为部分气流在迎风坡抬升,至沙丘顶加速并达到最大值,背风坡气流扩散,附面层分离形成涡旋,风速大幅降低。沙丘顶部以侵蚀为主,背风侧草方格破坏以沙埋为主,养护维修时应重点考虑。
Desert roads are significantly affected by sandstorms,therefore,it is crucial to take effective control measures.Hence,in the article,the desertification control facilities in deserts are observed and their failure was analyzed through oblique photography.The research findings indicate that:(1)wind is the main reason for the failure of desertification control facilities.On the one hand,sand dune movement causes grass grid and sand blocking fences to be fully or partially buried;On the other hand,wind causes erosion or overturning of desertification control facilities.In terms of aging speed,grass grid is more prone to aging and failure in the short term than nylon mesh.(2)Desertification control facilities in sand dune terrain are more prone to failure than in flat terrain.The main reason is that some airflow lifts up on the windward slope,accelerates to the top of the sand dune and reaches its maximum value,while airflow on the leeward slope diffuses,and the boundary layer separates to form vortices,resulting in a significant decrease in wind speed.In addition,the top of the sand dune is mainly eroded,while the damage to the grass grid on the leeward side is caused by sand burial,which should be given special consideration in maintenance and repair.
作者
陶智忠
张强
Tao Zhizhong;Zhang Qiang(Ningxia Communications Construction Transportation Technology Research Institute Co.,Ltd.,Yinchuan 750004;Ningxia Communications Construction Co.,Ltd.,Yinchuan 750021)
出处
《中阿科技论坛(中英文)》
2025年第2期70-74,共5页
China-Arab States Science and Technology Forum
基金
宁夏回族自治区交通运输厅科技项目(202000176)。
关键词
沙漠公路
防沙措施
倾斜摄影
失效分析
Desert roads
Desertification control measures
Oblique photography
Failure analysis
