Specializing in the production of wire mesh fence and sound barriers
Applicability of highway noise barriers
2022-04-11
The construction and operation of expressways have driven rapid regional economic development, but have also brought noise pollution to sensitive areas such as residents, schools, and hospitals along the route. Noise barriers, due to their small space occupation and significant noise reduction, have been widely used on expressways. However, most designs are extremely unreasonable, and the design, selection, and material construction of noise barriers are rather arbitrary and blind.
Abroad, relatively complete design and selection standards have been formed; however, in China, because the research on expressway noise barriers has just begun, the research on applicability is still blank, so it is necessary to study the applicability of expressway noise barriers in China.
Based on the absorption of domestic and foreign research results and the summary of existing expressway environmental protection practices, this paper, through extensive investigations, classifies and summarizes expressway noise barriers according to their form, materials, structure, and location, provides examples of noise barrier structures, draws noise barrier structure diagrams, and provides a database with practical application value for noise barrier design in China; it also summarizes domestic and foreign experience in noise barrier selection and design, provides standards and methods for expert evaluation systems, researches and develops a selection and evaluation system for noise barriers, making the design of noise barriers more standardized and scientific, and maximizing the technical efficiency of noise barrier design.
Based on the sound wave pressure formula and diffraction theory, the diffraction loss theory of highway noise barriers is derived, a calculation formula for finite-length noise barriers is derived, and computerized calculation is realized. Compared with the standard algorithm, although the difference between the two is not large, the formula calculation is simpler and more accurate. The feasibility of using the calculation formula for highway noise barriers is verified by the actual measurement of the single-sided noise barrier on the Hexu Expressway embankment. Finally, based on the above content, an engineering example is given, which has practical significance for the design of highway noise barriers in China.
This paper provides calculation formulas for the acoustic design of highway noise barriers and establishes a comprehensive evaluation system for highway noise barriers. The geometric shape and location of the highway noise barrier are determined through acoustic design. Through a comprehensive evaluation system, suitable materials and structures for the noise barrier are selected, making the designed highway noise barrier more reasonable and applicable.
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