太中银铁路典型路段防沙体系及其防护效果试验研究  

Research on the Construction and Effect of Sand-Prevention System in Typical Section of Taiyuan-Zhongwei-Yinchuan Railway

作　　者：杨有海[1,2] 刘文晓[2] 刘辉[2] 刘永河[3] 

机构地区：[1]甘肃省道路桥梁与地下工程重点实验室,甘肃兰州730070 [2]兰州交通大学土木工程学院,甘肃兰州730070 [3]兰州交通大学铁道技术学院,甘肃兰州730000

出　　处：《中国铁道科学》2014年第1期13-20,共8页China Railway Science

基　　金：铁道部科技研究开发计划项目(2011G023-C);长江学者和创新团队发展计划项目(IRT1139)

摘　　要：针对太中银铁路受风沙危害日益严重的情况,根据因地制宜、因害设防等原则,以其中沙害最严重的定银线上K1 563＋500—K1 566＋850区段为试验段,在该区段内开展先设立复式阻沙栅栏、草方格及尼龙格状固沙网等工程治沙措施,后种植树（草）的防沙体系及其防护效果的试验研究.结果表明：阻沙栅栏的阻沙率随风速的增大而降低,平均阻沙率为81.1％;采取阻沙栅栏与尼龙格状固沙网相结合的综合阻沙固沙措施,不但能进一步提高阻沙率（平均为92.8％）,还能扩大积沙沉积的范围,且延长阻沙栅栏的使用寿命;采用草方格沙障措施可使地表粗糙度增加109倍,近地表风速降低45％～60％,流动沙面被固定;在工程治沙措施的保护下,区段内植被覆盖度提高了10～15倍,形成植物防沙体系,有效治理了铁路沙害.In view of the increasingly serious situation of blown sand hazards of Taiyuan-Zhongwei-Yin-chuan Railway,the most severely damaged section of K1 563＋500—K1 566＋850 on Dingbian-Yinchuan Railway was taken as the test section based on the rules of controlling and preventing the sand disasters according to local conditions.The sand control measures,such as compound sand break palisade,straw and nylon checkerboard sand barriers were first taken to prevent the blown sand,then trees （grasses） were planted to form the sand-prevention system,and the protection effects were tested and studied.The results indicate that the sand trapping ratio of sand break palisade decreases with the increase of the wind velocity,and the mean sand trapping ratio is 81.1％.The integrated sand prevention and fixation measures of sand break palisade and nylon checkerboard sand barriers can not only further improve sand trapping ratio （an average of 92.8 ％） and enlarge the deposition scope of blown sand,but also prolong the service life of the sand break palisade.The straw checkerboard sand barriers can increase the roughness of ground surface by 109 times and lower the near surface wind velocity by 45％～60％,thus the flowing sand surface can be fixed.With these sand protection measures,the vegetation coverage in this area has increased by 10 ～15 times and the vegetation sand prevention systems are formed,so the sand damage to railway has been effectively controlled.

关 键 词：铁路沙害 防沙体系 阻沙栅栏 草方格沙障 尼龙格状固沙网 防护效果 

分 类 号：U216.41[交通运输工程—道路与铁道工程]