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基于动视觉特性的高速公路景观敏感区划分

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Keywords: 道路工程,高速公路景观,敏感区划分,动视觉特性

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Abstract:

分析了驾驶人动视觉特性,研究了驾驶人的水平视野角度、前景视图、注意力集中点与最深视野随着车速的变化规律,构建了基于驾驶人动视觉特性的高速公路景观敏感区模型,并推导了景观敏感区函数。运用景观敏感区模型计算了双向四车道高速公路在不同限速条件下的景观敏感区尺度,运用景观敏感区函数获得分级结果,并阐述了不同景观敏感区的属性与景观要素设计要点。通过对比试验,研究了边坡宽度与一级景观敏感区尺度之间的关系。研究结果表明双向四车道高速公路景观敏感区尺度为545m,一~三级敏感区尺度分别为55、260、230m,其中一级景观敏感区属于最敏感区域;进行边坡景观设计时可通过修正坡度的方法改变边坡宽度占高速公路景观敏感区的比重,坡度越缓,景观敏感性越高。

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