在分析青藏铁路北麓河路段风沙灾害现状和风沙环境的基础上，将三维激光扫描技术应用于风沙工程防护体系的效益评价中，利用Leica C10三维激光扫描仪精确测量青藏铁路两侧典型防沙措施及防护体系积沙形态特征和风沙堆积量，评估防护效益。百叶窗条形阻沙栅栏单宽积沙体积最大，为18.31 m3，其次为不通风条形阻沙栅栏，单宽积沙体积为13.66 m3。阻沙栅栏最大防护距离为12 H，即上风向-3~0 H范围和下风向0~9 H范围内，双排结构的阻沙栅栏无论积沙范围或积沙量均较单排结构阻沙栅栏好。在栅栏上风向，沙粒自距栅栏5 m处开始沉降堆积，越靠近栅栏，积沙厚度越大。在阻沙栅栏的下风向，单排结构阻沙栅栏积沙范围为15 m，双排结构阻沙栅栏积沙范围可达20 m。
3 D laser scanning technique was used to evaluate the benefit of wind-blown sand prevention system in the Beiluhe section of the Qinghai-Tibet Railway. Morphological characteristics of sand-accumulation, wind erosion and deposition profiles of typical sand-control methods were measured accurately by the 3D Leica Scanner. Based on the present situation of sand damages, aeolian environment and the data from 3D Leica Scanner in the field, this paper aims to analyses the sand-defensive benefit of wind-blown sand prevention system in the Beiluhe Section of the Qinghai-Tibet Railway. The objective of this study is to provide technical support to the selection of sand-control measures, structure optimization and rational distribution of the integrative sand drift control system.
[1] 谢胜波,屈建军,刘冰,等.青藏铁路沙害及其防治研究进展[J].中国沙漠,2014,34(1):42-48.
[2] 祝广华,陶玲,任珺.青藏铁路工程迹地对植被的影响评价[J].草地学报,2006,14(2):160-164.
[3] Wu Q B,Shi B,Fang H Y.Engineering geological characteristics and processes of permafrost along the Qinghai Xizang (Tibet) Highway[J].Engineering Geology,2003,68:387-396.
[4] Yang M X,Wang S L,Yao T D,et al.Desertification and its relationship with permafrost degradation in Qinghai-Xizang (Tibet) Plateau[J].Cold Regions Science and Technology,2004,39:47-53.
[5] 牛清河,屈建军,张克存,等.青藏铁路典型路段风沙灾害现状与机械防沙效益估算[J].中国沙漠,2009,29(4):596-603.
[6] 张克存,屈建军,牛清河,等.青藏铁路沿线砾石方格固沙机理风洞模拟研究[J].地球科学进展,2010,25(3):284-289.
[7] 俎瑞平,贺志霖,宗玉梅,等.青藏高原风沙堆积对多年冻土影响研究进展[J].中国沙漠,2014,34(5):1208-1214.
[8] 唐玉龙.青藏铁路西格段戈壁风沙流防治体系研究[J].中国沙漠,2013,33(1):72-76.
[9] 肖建华.青藏铁路(格拉段)风沙危害及其防治研究[D].北京:中国科学院大学,2014:1-5.
[10] 姚正毅,屈建军.青藏铁路格尔木-拉萨路风成沙物源及其粒度特征[J].中国沙漠,2012,32(2):300-307.
[11] 张克存,屈建军,姚正毅,等.青藏铁路格拉段风沙危害及其防治[J].干旱区地理,2014,37(1):74-80.
[12] 殷代英,屈建军,韩庆杰,等.青藏铁路错那湖段风沙活动强度特征分析[J].中国沙漠,2013,33(1):9-15.
[13] 安志山,张克存,屈建军,等.青藏铁路沿线风沙灾害特点及成因分析[J].水土保持研究,2014,21(2):285-289.
[14] 王多青.青藏铁路格拉段风沙防治[J].铁道工程学报,2009,10:12-15.
[15] Zhang K C,Qu J J,Liao K T,et al.Damage by windblown sand and its control along Qinghai-Tibet Railway in China[J].Aeolian Research,2010,2:143-146.
[16] 李顺平,蒋富强,薛春晓,等.青藏铁路格拉段沙害现场调查及防治研究[J].铁道工程学报,2014,5:1-4.
[17] 杨印海,蒋富强,王锡来,等.青藏铁路错那湖段沙害防治措施研究[J].中国沙漠,2010,30(6):1256-1262.
[18] Zhang K C,Qu J J,Niu Q H,et al.Characteristics of wind-blown sand and dynamic environment in the section of Wudaoliang-Tuotuo River along the Qinghai-Tibet Railway[J].Environmental Earth Sciences,2011,64:2039-2046.
[19] 张克存,俎瑞平,方海燕.不同孔隙度尼龙网对风沙流减弱作用的风洞模拟[J].水土保持学报,2004,18(4):4-11.
[20] 屈建军,刘贤万,雷加强,等.尼龙网栅栏防沙效应的风洞模拟实验[J].中国沙漠,2001,21(3):276-280.
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