【摘要】 在风洞实验、野外观测的基础上,采用系统仿真方法,对沙坡头铁路风沙防护体系防护效益、结构配置、防护宽度进行了研究.风洞实验测定了流沙输沙率、栅栏阻沙率、草方格阻沙率、植被阻沙率.与风洞实验模型相似的野外观测,确定了风洞实验数据与野外观测数据转换系数.以风洞实验、野外观测数据为基础,对防护体系三种不同配置结构的防护宽度,进行了系统仿真研究.阻沙栅栏+草方格+植被的防护体系结构防护宽度90—95m,阻沙栅栏+草方格的防护体系结构防护宽度100—105m,2道阻沙栅栏+草方格+植被的防护体系结构防护宽度50—55m,可以达到流沙输沙与防护系统阻沙量理论平衡.研究所得结论对风沙区交通线路防护体系设计具有借鉴意义,所采用的方法,对风沙工程研究有普遍适用意义.更多还原

【Abstract】 The efficiency, structure scheme and protection width of wind and sand protection system for railway in Shapotou are studied with the method of system simulation on the basis of wind tunnel experiment and field measurement. The ratio of moving sand transportation, ratio of stop sand by fence, ratio of stop sand by straw checkerboard, ratio of stop sand by vegetation are measured by wind tunnel experiment. Then the transformation coefficient from the data in wind tunnel experiment to the data in field observation is determined. Based on the wind tunnel experiment and field observation, the system simulation is applied to determine the protection width of three different structure scheme. System of the pattern of fence+straw chessboard+vegetation with 90—95m wide, system of the pattern of fence+straw chessboard with 100—105m wide, system of the pattern of 2fence+straw chessboard+vegetation with 50—55m wide, is enough to keep the sand transpot quantity and the sand arresting quantity in theoretic balance.The result from the study can help design the protection system of traffic roads in wind and sand region, and the methods used in the paper can be used universally to make the protection project of wind and sand.更多还原