CAJ | 학술논문

青藏铁路红梁河路段沙害严重,目前致灾机理尚不明确,防沙措施效果有限。为系统认识青藏铁路的沙害规律,通过野外观测和室内分析、计算等方法,对红梁河路段的沙物质来源、风沙动力环境、防沙措施进行研究。发现红梁河路段沙物质主要来自铁路西侧沙山,颗粒组成以细沙为主；年起沙风以 W 和 NNE 两组风向为主,分别占全年总量的18.43%和17.21%,实际造成沙害的为 W 风；年输沙势为315.50 VU,年合成输沙势为204.97 VU,年方向变率指数为0.65,合成输沙方向为102.41°；在大风干燥季节(主要为1~3月),风吹扬沙物质自西向东搬运,遇到近似南北走向的铁路路基阻挡产生堆积而致灾。本文提出以阻(沙)、固(沙)为主,远阻近固(外阻内固),输导为辅的防沙模式,对类似地区防沙有借鉴意义。
청장철로홍량하로단사해엄중,목전치재궤리상불명학,방사조시효과유한。위계통인식청장철로적사해규률,통과야외관측화실내분석、계산등방법,대홍량하로단적사물질래원、풍사동력배경、방사조시진행연구。발현홍량하로단사물질주요래자철로서측사산,과립조성이세사위주；년기사풍이 W 화 NNE 량조풍향위주,분별점전년총량적18.43%화17.21%,실제조성사해적위 W 풍；년수사세위315.50 VU,년합성수사세위204.97 VU,년방향변솔지수위0.65,합성수사방향위102.41°；재대풍간조계절(주요위1~3월),풍취양사물질자서향동반운,우도근사남북주향적철로로기조당산생퇴적이치재。본문제출이조(사)、고(사)위주,원조근고(외조내고),수도위보적방사모식,대유사지구방사유차감의의。
Sand hazards in the Honglianghe Section of the Qinghai-Tibet Railway are serious,and the effect of current controlling measures is limited due to the fact that the causes remains unclear.In order to further un-derstand systematically the laws of sand hazards along the Qinghai-Tibet Railway,the source of sandy materi-als,sand blowing environment and sand storm protection measures were studied for the Honglianghe Section through field observation and indoor analysis.The results were discovered as follows:Sandy materials are mainly blown from the sandy hill west of the railway line and composed of fine sand grains;yearly sand-moving winds are dominated by two groups of wind directions of W and NNE,accounted for 18.43% and 17.21% re-spectively,and it is the W wind which actually causes sand hazards;the yearly drift potential is 315.50 VU,the resultant drift potential is 204.97 VU and the yearly direction variability rate is 0.65 with the resultant drift di-rection being 102.41°;in the windy dry season (mainly for 1 ~ 3 months),sandy materials were blown and moved from west to east and were accumulated to cause disasters when coming to the barriered of the north to south railway subgrade.This paper put forward the sand control mode,i.e.,relying mainly on sand blocking and fixing while making sand transport and diversion supplementary and adhereing to the principle of far and outer sand blocking and near and inner sand fixing.The mode has reference significance to control of sand haz-ards in other similar zones.