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.
Benefit of Wind-Blown Sand Prevention System in the Beiluhe Section of the Qinghai-Tibet Railway
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.
NETL
NSTL
万方数据
维普
