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目的了解高架轻轨噪声对周围环境的影响。方法对南京市地铁一号线高架轻轨运行时对周边南京医科大学教学楼及办公楼、明德医院门诊及住院部和商店的噪声影响情况进行测定。结果 (1)学校教学楼1、3、5楼在列车通过时(开窗状态)测得的噪声值分别为57.0、57.4、56.3 d B(A),均超标〔>55 d B(A)〕;办公楼1、3、5楼在列车通过时(开窗状态)测得的噪声值分别为58.9、63.8、63.9 d B(A),均超标。(2)医院病房楼1、3楼在列车通过时(开窗状态)测得的噪声值分别为66.7、61.5 d B(A),均超标;病房楼1、3、6、9楼在列车通过时(开窗状态)测得的噪声值分别为60.3、55.5、57.1、56.9 d B(A),均超标。(3)商场1、2、3楼在列车通过时测得的噪声值分别为67.2、65.8、68.1 d B(A),亦超标〔>60 d B(A)〕。(4)列车通过时关窗与开窗相比能平均降低噪声10.6 d B(A),关窗时噪声基本不超标。结论列车通过时,周边学校、医院、商场测得噪声值(开窗状态)均高于声环境质量标准规定的限值;关窗能明显降低高架轻轨噪声。同时应采取有效措施降低高架轻轨噪声。
Objective To understand the impact of elevated light rail noise on the surrounding environment. Methods The noise impact on the teaching building and office building of Nanjing Medical University and outpatient department and inpatient department and shops of Nanjing Mingde Hospital were determined during the operation of the elevated light rail of Nanjing Metro Line 1. Results (1) The noise values measured on the first, the fifth and fifth floors of the school teaching building were 57.0, 57.4 and 56.3 d B (A) ]; The noise values measured on the 1st, 3rd, 5th floor of the office building when the train passes (the window is opened) are respectively 58.9, 63.8 and 63.9 d B (A), exceeding the standard. (2) The noise values measured at the first and third floors of the hospital ward building at the time of passing by the train (window opening status) were 66.7 and 61.5 d B (A) The noise values measured at the time of passing through (windowed state) were 60.3, 55.5, 57.1 and 56.9 d B (A), respectively. (3) The noise levels of the shopping centers 1, 2, 3, and 6 measured at the passing of the train are 67.2,65.8,68.1 d B (A) respectively, exceeding the standard of> 60 d B (A). (4) When the train passes the window, the average noise can be reduced by 10.6 d B (A) compared with the window opening, and the noise is basically not exceeded when the window is closed. Conclusion When the train passes, the noise (window opening state) measured by surrounding schools, hospitals and shopping malls are higher than the limits specified by the acoustic environmental quality standard; the window clearance can obviously reduce the noise of overhead light rail. At the same time, effective measures should be taken to reduce the overhead light rail noise.