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在高速公路改扩建过程中,侧向净宽的大小有很大的影响,主要影响着工程的价格、施工的质量、施工与运营的安全以及通行能力,其中,对通行能力的影响尤为明显。基于侧向净宽修正系数与通行能力正相关的原理,得到侧向净宽和通行能力的关系曲线图,根据曲线斜率变化的规律判断侧向净宽的合理大小。以昌樟高速公路改扩建工程作为具体实例,对胡家坊互通到樟树南段不同侧向净宽条件下的通行能力进行分析研究。结果表明,侧向净宽大小的合理范围应在0.5m~0.75m,具体大小需要结合改扩建实际情况进行论证分析。
In the process of highway reconstruction and expansion, the width of the lateral width has a great impact, mainly affecting the price of the project, the quality of the construction, the safety of the construction and operation, and the capacity of traffic. Among them, the impact on traffic capacity is particularly obvious. Based on the positive correlation between the lateral net width correction coefficient and the traffic capacity, the relationship between the lateral net width and the traffic capacity is obtained, and the reasonable size of the lateral net width is judged according to the law of the curve slope change. Taking Changzhang Expressway Reconstruction and Extension Project as a concrete example, this paper analyzes and studies the traffic capacity under the condition of different lateral clear width of the south section of Hujiazhang interchange. The results show that the reasonable range of lateral clear width should be 0.5m ~ 0.75m, the specific size needs to be combined with the actual situation of reconstruction and expansion for demonstration analysis.