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高速公路改扩建交通组织仿真

, PP. 38-43

Keywords: 道路工程,高速公路改扩建,通行能力,交通组织,仿真模型

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Abstract:

为保证高速公路改扩建期间的通行能力,进行了交通组织方案研究。基于仿真模型的建模流程,分析了交通组织的影响因素,剔除了对结果影响微弱的因素,并对仿真模型中的道路条件和交通条件提出了基本假定。以东港(东营―海港)高速公路改扩建工程为例,建立了单向封闭的交通组织仿真模型,通过对比车速的仿真值和实测值,进行了模型有效性验证。仿真结果表明相邻2个施工路段之间的最小间隔应大于6km;上游渐变段长度推荐最少为30m,缓冲段长度推荐为300~500m;下游渐变段长度推荐最少为30m,缓冲段长度为100~200m;考虑到施工现状和交通设施的利用状况,中央分隔带开口长度建议取80~100m;随着限速标志与上游合流点的距离增加,行程车速先增加,后逐渐降低,限速标志设置位置推荐为作业区前800m。

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