新恩铁路风沙路基平面防护工程试验研究  

Experimental study on wind-drift-sand subgrade protection project in Xinjie-Enge’alou railway

作　　者：马旭东 Ma Xudong(China Railway Engineering Design and Consulting Group Co.,Ltd.,Beijing 100055,China)

机构地区：[1]中铁工程设计咨询集团有限公司,北京100055

出　　处：《铁道勘察》2020年第3期53-57,共5页Railway Investigation and Surveying

摘　　要：新恩铁路穿越毛乌素沙漠的活动沙丘和半固定沙丘。为防止铁路路基在风季遭受沙埋,需在路基两侧设置平面防护工程。根据气象风沙监测的结果,选取有代表性的路基地段,分别进行机械固沙辅以植物防护及栽种树枝沙障固沙的现场试验研究。试验结果表明:在流动沙丘段设置规格为1 m×1 m、高度为0.25 m的经编防风固沙网格,网格内种植灌木,并于迎风侧最外侧设置2排高度为1.5 m的高立式沙障;在半固定沙丘试验段选择直径不小于10 mm、长度为55 cm的沙柳树枝沙障固沙(沙柳不小于70%的成活率),并于迎风侧最外侧设高立式沙障。经现场监测,两种措施均能有效降低风速,减少输沙量,达到防沙治沙效果。通过试验,制定了本线风沙路基平面防护的主要措施并推广应用。现铁路已通车多年,防沙效果良好。Xinjie-Enge’alou railway traverses the active and semi-fixed dunes of Maowusu desert.In order to prevent the railway being buried during the wind season,plane protection works shall be set up on both sides of the subgrade.According to the meteorological monitoring results of wind-drift sand,representative subgrade sections were selected to carry out field experiments respectively on mechanical sand fixation with plant protection and sand fixation by sand barriers with planted branches.In active dune sections,a windproof and sand fixing warp-knitted grid with a specification of 1 m×1 m and a height of 0.25 m was set.Shrubs were planted in the grid and two rows of 1.5 m high stand sand barriers were set on the outermost side of the windward side.In semi-fixed dunes,a sand barrier of salix mongolica branches with a diameter of no less than10 mm and a length of 55 cm was selected to fix sand(with a survival rate of no less than 70%),and a high stand sand barrier was set on the outmost side of the windward side.The monitoring result shows that both measures can effectively reduce the wind speed and the sand transporting quantity and achieve the effect of sand control.Through the field test,main measures of plane protection in wind-drift-sand subgrade are developed and popularized in application.Now the railway has been open to traffic for many years with a good effect on sand protection.

关 键 词：风沙路基 平面防护 试验 经编防风固沙网格 树枝沙障 

分 类 号：U213.1[交通运输工程—道路与铁道工程]