快速高架复合道路噪声特点研究

A study on the characteristics of traffic noise of high-speed elevated combination roads

提出了等效声屏障模型，计算其不同车流量下的Ａ计权声插入损失；采用虚声源法预测双层高架复合道路（即典型的高架复合道路）两侧的声场分布，得出这一复杂声场的特点，结果表明，地面道路噪声对上半空间声场的影响大于上层道路噪声对下半空间声场的影响，从而指出，必须对高架上层和地面采取包括声屏障在内的综合防治措施，才能收到良好效果。

In this paper an equivalent sound barrier model is proposed and its A-weighted sound insertion loss under different traffic volumes is computed. The sound field of an elevated combination road is predicted by using the virtual source method and the characteristics of this complex sound field are obtained. The computations indicate that the contribution of the ground road noise to the sound field in the upper half-space is greater than the contribution of the upper road noise to the sound field in the upper half-space. Hence it is pointed out that better results can be achieved only by taking comprehensive measures including the installation of sound barriers on both the upper road and the ground road.