Fuzhou World Bank Financed Projects Nanjiang Binlu, Phase-ii project of the Third Ring Road and Kuiqi Bridge environmental impact report
Analysis of noise impact during construction period and mitigation measures
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- 5.2.2 Investigation on noise intensity of construction equipment
- 5.2.3 Forecasting result of noise
- 5.2.4 Assessment of noise during construction period
5.2 Analysis of noise impact during construction period and mitigation measures5.2.1 Range and standard of assessmentIn accordance with Specification for Environment Impact Assessment of Highway, range of assessment of road construction’s noise impact refers to the range of 50m on the two sides of proposal items of road construction. Because the Project has been constructed as district, there are many sensitive points of noise environment within the range of 50m on the two sides of the road; therefore, key point of assessment on noise in construction period is the impact of noise in the construction period on noise environment. Its standard of assessment adopts Noise Standard on Construction Site (GB12523—90) , which provides noise limits on construction site in construction period as the following Table 5.2-1. Table 5.2-1 Noise Standard on Construction Site (GB12523—90) Unit: dB(A)
5.2.2 Investigation on noise intensity of construction equipmentThere are various mechanical equipments used in road construction. According to actual investigation and comparative analysis, main mechanical equipments used in construction include excavator, bulldozer, grader, concrete mixer, road roller, pay loader and spreader etc. Noise values produced by construction mechanical equipments in operating period are listed in table 5.2-2. Table 5.2-2 Noise values of various construction mechanical equipments Unit: dB(A)
5.2.3 Forecasting result of noiseNoise sources of construction of the Project can be disposed as point noise source appreciatively. According to damping mode of noise from point noise source, noise values within different distance from noise source in construction period can be estimated, as the following forecasting mode: 
In the arithmetic formula :  --Reference noise level [dB(A) ]within the distance of  m from noise source
According to noise value of various construction machineries, forecasting noise value of different construction machineries within different distances can be calculated. See the following Table 5.2-3. Table 5.2-3 Forecasting noise value of different construction machinery within different distances
According to forecasting results in Table 5.2-3, in construction period of the Project, noise exceeds 3～9dB(A) over the standard regulated Noise Standard on Construction Site (GB12523—90) in the daytime; in the nighttime, it also exceeds 1～23dB(A) over the standard. It is obvious that noise produced by construction will bring about impact within the range of 50m around the construction site, especially in nighttime. 5.2.4 Assessment of noise during construction periodAccording to forecasting result of **, during construction period of the Project, noise exceeds 3～9dB(A) over the standard regulated Noise Standard on Construction Site (GB12523—90) in the daytime; in the nighttime, it also exceeds 1～23dB(A) over the standard. It is obvious that noise produced by construction will impact within the range of 50m around the construction site, especially in nighttime. Therefore, strict measures must be taken to relieve impact caused by noise on surrounding environment in construction of the above-mentioned regions. Directory: curated curated -> Concept stage curated -> Concept stage curated -> Republic of Côte d'Ivoire Urbanization Review curated -> Report No: aus11011 Central America curated -> Report No. 94474-pk fiscal Disaster Risk Assessment Options for Consideration curated -> Environmental and Social Management Framework for the Costa Rica Telecommunications Sector Modernization Project curated -> Environment Impact Assessment For Jiangxi Shangrao Sanqingshan Airport Beijing Guohuantiandi Environmental Technology Development Center. Ltd. Oct. 2012 Content curated -> Growth through Innovation An Industrial Strategy for Shanghai By Shahid Yusuf Kaoru Nabeshima April 22nd, 2009 curated -> Report No: 70178. People's Republic of China Download 3.93 Mb. Share with your friends:
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-- Forecasting value [dB(A) ] of construction noise within the distance of r m from noise source;