Multi-parameter evaluation method of noise pollution based on ratio analysis

Abstract

The present invention provides a noise pollution multi-parameter evaluation method based on ratio analysis method, comprising the following steps: S1, a calculation method for constructing a noise pollution propagation attenuation model; S2, screening the type of noise attenuation parameters; S3, determining the calculation formula and coefficient in formula (1) by detection; S4, transforming the noise attenuation parameters, and verifying formula (2) by comparing the actual sound level value with the calculated sound level value; S5, based on the calculation result of formula (2), and evaluating the category of noise pollution source by ratio analysis method. The present invention combines a plurality of parameters that have an impact on noise attenuation to construct a noise pollution propagation model, can quickly evaluate the level of noise pollution source, has high calculation accuracy, provides technical support for the evaluation of noise pollution source category, and is particularly instructive for the prediction and avoidance of construction site noise.

Description

Technical Field

[0001] The invention relates to a noise pollution multi-parameter evaluation method based on a ratio analysis method. Background Art

[0002] At present, although my country's Ministry of Ecology and Environment has issued a series of acoustic environmental impact assessment standards, the acoustic environmental impact assessment methods provided by the relevant standards have problems such as complex operation, unreasonable selection of noise impact parameters, difficulty in calculation, small scope of application, and calculation results that cannot directly reflect the level of noise pollution sources. In particular, it is extremely inapplicable to the calculation of noise attenuation models, thus increasing the workload of on-site management personnel. Therefore, it is necessary to directly construct the attenuation model of noise pollution sources by screening environmental parameters that have a greater impact on noise attenuation according to the actual working conditions of the construction site, and then combine it with the sound functional area to construct a prediction and evaluation model to complete the evaluation of Class I and Class II noise pollution sources. Summary of the invention

[0003] The purpose of the present invention is to provide a noise pollution multi-parameter evaluation method based on the ratio analysis method, which combines a variety of parameters that affect noise attenuation to construct a noise pollution propagation model, can quickly evaluate the level of noise pollution sources, has high calculation accuracy, and provides technical support for the evaluation of noise pollution source categories. It is particularly helpful for predicting and avoiding construction site noise, and reduces the workload of construction site managers.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is to adopt a noise pollution multi-parameter evaluation method based on ratio analysis method, and the method comprises the following steps:

[0005] S1. The calculation method for constructing the noise pollution propagation attenuation model is:

[0006] L A =-C0×f(A1,A2,...,A n )+C (1)

[0007] Among them, L A is the sound level value at any point around the noise pollution source, A1, A2, ..., A n is the noise attenuation parameter, C is the sound level value at 1m away from the noise pollution source, and C0 is the function coefficient of the noise attenuation parameter;

[0008] S2. Screening the types of noise attenuation parameters;

[0009] S3. Conduct multiple experiments by detecting actual sound level values ​​to determine the calculation formula and coefficients of each noise attenuation parameter in formula (1); the specific experimental method is to continuously adjust the value of one of the noise attenuation parameters while fixing the values ​​of other noise attenuation parameters to determine the law of the influence of each noise attenuation parameter on the attenuation of the sound level value; substitute the calculation formula and coefficient into formula (1) to obtain formula (2);

[0010] S4, changing the noise attenuation parameter, and verifying formula (2) by comparing the actual sound level value with the calculated sound level value;

[0011] S5. Based on the calculation results of formula (2), the category of noise pollution source is evaluated by ratio analysis method.

[0012] Preferably, the noise attenuation parameters include the noise propagation distance, the angle between the line connecting the noise source and the upper edge of the barrier and the horizontal plane, and the wind speed.

[0013] 3. Preferably, formula (2) in step S3 is:

[0014]

[0015] Among them, L A is the sound level value at any point around the noise pollution source, x is the noise propagation distance, ranging from 1 to 500 m, α is the slope angle, ranging from 0 to 60°, V wind is the wind speed, β is the angle between the wind direction and the noise propagation direction, and C is the sound level value 1m away from the noise pollution source.

[0016] Preferably, the specific method of evaluating the noise pollution source category by the ratio analysis method is: the sound level value L of the sensitive point closest to the noise propagation distance calculated by formula (2) is A The corresponding environmental noise limit L lim The ratio is calculated by formula (3) to obtain η, which is as follows:

[0017]

[0018] Wherein, η is the noise level. When η≥1, it is determined to be a Class I noise source, and when η<1, it is determined to be a Class II noise source.

[0019] Beneficial effects: The present invention combines a variety of parameters that affect noise attenuation to construct a noise pollution propagation model, which can quickly evaluate the level of noise pollution sources with high calculation accuracy, providing technical support for the evaluation of noise pollution source categories, and is particularly instructive for the prediction and avoidance of construction site noise. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application are described clearly and completely below. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0021] The noise pollution multi-parameter evaluation method based on ratio analysis method includes the following steps:

[0022] S1. The calculation method for constructing the noise pollution propagation attenuation model is:

[0023] L A =-C0×f(A1,A2,...,A n )+C (1)

[0024] Among them, L A is the sound level value at any point around the noise pollution source, A1, A2, ..., A n is the noise attenuation parameter, C is the sound level value at 1m away from the noise pollution source, and C0 is the function coefficient of the noise attenuation parameter. The technical idea of ​​constructing formula (1) is to use C as the base number, fit the parameters that may affect the noise attenuation, and conduct an exploration test on the influence of the parameters on the noise attenuation, so as to make the model more in line with the actual working conditions.

[0025] S2. Screen the types of noise attenuation parameters, which include noise propagation distance, angle between the line connecting the noise source and the upper edge of the barrier and the horizontal plane, and wind speed. The screening method uses the single comparative test in step S3 to determine the parameter with the most obvious effect on noise attenuation.

[0026] S3. By testing the actual sound level value and conducting multiple experiments, the calculation formula and coefficient of each noise attenuation parameter in formula (1) are determined; the specific experimental method is to continuously adjust the value of one of the noise attenuation parameters, while fixing the values ​​of other noise attenuation parameters, and determine the law of the influence of each noise attenuation parameter on the attenuation of the sound level value; the calculation formula and coefficient are substituted into formula (1) to obtain formula (2):

[0027]

[0028] Among them, L A is the sound level value at any point around the noise pollution source, x is the noise propagation distance, the value range is 1-500m, α is the slope angle, V wind is the wind speed, β is the angle between the wind direction and the noise propagation direction, and C is the sound level value at 1m away from the noise pollution source.

[0029] S4. Change the noise attenuation parameters and verify formula (2) by comparing the actual sound level value with the calculated sound level value. After verifying the actual sound level values ​​of noise sources such as electric saws, electric hammers, concrete pumps, angle grinders, grinders, cutters, impact drills, and excavators, the error between the calculation result of formula (2) and the actual sound level value is within 3%.

[0030] S5. Based on the calculation result of formula (2), the category of noise pollution source is evaluated by ratio analysis method. The specific method is: the sound level value L of the sensitive point closest to the noise propagation distance calculated by formula (2) is A The corresponding environmental noise limit L lim The ratio is calculated by formula (3) to obtain η, which is as follows:

[0031]

[0032] Wherein, η is the noise level. When η≥1, it is determined to be a Class I noise source, and when η<1, it is determined to be a Class II noise source.

[0033] For Class I noise sources with an evaluation value > 1, engineering and technical measures need to be adopted to manage the pollution sources, such as: sound insulation barriers, replacement of low-noise operating equipment; for Class II noise sources with an evaluation value < 1, only management and technical measures need to be adopted on site to manage the pollution sources, such as: operation time management, operation cycle management, etc.

[0034] Although this specification has shown and described a plurality of embodiments of the present invention, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many changes, modifications and alternatives without departing from the thought and spirit of the present invention. It should be understood that in the process of practicing the present invention, various alternatives to the embodiments of the present invention described herein may be adopted. The attached claims are intended to define the scope of protection of the present invention, and therefore cover the modular composition, equivalent or alternatives within the scope of protection of these claims.

Claims

1. A noise pollution multi-parameter evaluation method based on ratio analysis, characterized in that: The following steps are involved: S1. The calculation method for constructing the noise pollution propagation attenuation model is: L A =-C0×f(A1,A2,...,A n )+C (1) Among them, L A is the sound level value at any point around the noise pollution source, A1, A2, ..., A n is the noise attenuation parameter, C is the sound level value at 1m away from the noise pollution source, and C0 is the function coefficient of the noise attenuation parameter; S2. Screening the types of noise attenuation parameters; S3. Conduct multiple experiments by detecting actual sound level values ​​to determine the calculation formula and coefficients of each noise attenuation parameter in formula (1); the specific experimental method is to continuously adjust the value of one of the noise attenuation parameters while fixing the values ​​of other noise attenuation parameters to determine the law of the influence of each noise attenuation parameter on the attenuation of the sound level value; substitute the calculation formula and coefficient into formula (1) to obtain formula (2); S4, changing the noise attenuation parameter, and verifying formula (2) by comparing the actual sound level value with the calculated sound level value; S5. Based on the calculation results of formula (2), the category of noise pollution source is evaluated by ratio analysis method; The noise attenuation parameters in step S1 include the noise propagation distance, the angle between the line connecting the noise source and the upper edge of the barrier and the horizontal plane, and the wind speed; Formula (2) in step S3 is: Among them, L A is the sound level value at any point around the noise pollution source, x is the noise propagation distance, ranging from 1 to 500 m, α is the slope angle, ranging from 0 to 60°, V wind is the wind speed, β is the angle between the wind direction and the noise propagation direction, and C is the sound level value 1m away from the noise pollution source.

2. The noise pollution multi-parameter evaluation method based on ratio analysis method according to any one of claim 1, characterized in that: The specific method of evaluating the noise pollution source category by ratio analysis is: the sound level value L of the sensitive point closest to the noise propagation distance calculated by formula (2) is A The corresponding environmental noise limit L lim The ratio is calculated by formula (3) to obtain η, which is as follows: Wherein, η is the noise level. When η≥1, it is determined to be a Class I noise source, and when η<1, it is determined to be a Class II noise source.

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