| 沙漠路基边坡抗风蚀能力现场试验研究 |
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| 引用本文： | 李驰,黄浩,孙兵兵,高利平,刘霖.沙漠路基边坡抗风蚀能力现场试验研究[J].土木工程学报,2011(Z2). |
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| 作者姓名： | 李驰 黄浩 孙兵兵 高利平 刘霖 |
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| 作者单位： | 内蒙古工业大学; |
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| 基金项目： | 国家自然科学基金(50868010,51168035); 内蒙自然科学基金(2009BS0704) |
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| 摘 要： | 将路基边坡土体抗剪强度的变化作为其抗风蚀能力的表征。通过现场原位十字板剪切试验,以土体抗剪强度变化率为参数,确定沙漠路基边坡风蚀影响区域的临界边界,考虑环境风场强度、路基断面形式、路线走向与风向间关系、由边坡向路基内部方向水平延伸深度等因素的影响。建立路基边坡风蚀影响深度的预测模型,分析风蚀影响区域内土体抗剪强度的变化规律。试验结果表明:路基边坡风蚀影响区域临界线纵、横坐标呈幂函数变化形式,就该试验路段测试结果来看,风蚀影响区域水平延伸深度为0.37～0.67m。同时,风蚀影响区域内土体抗风蚀能力呈现出由坡面向路基内部方向逐渐增强、由坡脚向路肩方向逐渐减弱的趋势,且当路线走向与风向夹角为90°时路基抗风蚀能力较弱,常年主导风向作用下路基迎风坡抗风蚀能力小于其背风坡。对沙漠路基边坡抗风蚀能力进行定量分析,揭示沙漠路基边坡的风蚀机理。
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| 关 键 词： | 环境岩土工程 沙漠路基 抗风蚀能力 抗剪强度变化率 风蚀定量分析 |
Field test study on the anti-wind erosion ability for desert roadbed slope |
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| Li Chi Huang Hao Sun Bingbing Gao Liping Liu Lin.Field test study on the anti-wind erosion ability for desert roadbed slope[J].China Civil Engineering Journal,2011(Z2). |
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| Authors: | Li Chi Huang Hao Sun Bingbing Gao Liping Liu Lin |
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| Affiliation: | Li Chi Huang Hao Sun Bingbing Gao Liping Liu Lin (Inner Mongolia University of Technology,Huhhot 010051,China) |
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| Abstract: | Variation of shearing strength is regarded as the characteristics of the anti-wind erosion ability for roadbed slope soil.In order to ascertain critical boundary of wind erosion areas of desert roadbed slope,the variation rate of shearing strength is used as a parameter based on field vane shear test.Considering these impact factors including the environment wind strength,roadbed section types,the angle between roadbed route and wind direction,and horizontal depth from the surface of roadbed slope to roadbe... |
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| Keywords: | geoenvironmental engineering desert roadbed anti-wind erosion ability variation rate of shearing strength quantitative analysis on wind erosion |
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