Construction site dust raising control level evaluation method based on multi-source data

Abstract

The invention discloses a construction site dust control level evaluation method based on multi-source data, and the method comprises the steps: obtaining a construction stage of a construction site and a construction site dust control measure implementation condition, and obtaining a first evaluation result; obtaining an average extinction coefficient of the construction site area in combination with the light quantum radar to obtain a second evaluation result; carrying out particulate matter concentration monitoring over the construction site in combination with unmanned aerial vehicle cruise with a particulate matter sensor to obtain a third evaluation result; road dust accumulation load data of roads outside the construction site are monitored in combination with road dust accumulation sailing, and a fourth evaluation result is obtained; and combining the first evaluation result, the second evaluation result, the third evaluation result and the fourth evaluation result to comprehensively evaluate the dust raising control level of the construction site. According to the method, a scientific and reasonable evaluation index system is established based on multi-source data, multiple indexes in a three-dimensional space of the construction site are comprehensively considered, and limitation caused by single-index evaluation is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of dust monitoring and evaluation, and particularly relates to a method for comprehensively evaluating the dust control level of a construction site based on multi-source data (including field investigation, radar response, high-altitude pollution and road dust data, etc.). BACKGROUND

[0002] Construction site dust is one of the important sources of urban air pollution, which has a serious impact on human health and environmental quality. According to statistics, urban dust pollution accounts for 30% to 40% of the total suspended particulate matter emissions, and construction site dust accounts for 50% to 60% of the total dust emissions. Construction site dust not only leads to a decrease in air quality, but also causes respiratory diseases, cardiovascular diseases, lung cancer and other health problems.

[0003] At present, the evaluation of construction sites is usually only for whether the control measures are implemented, and the existing evaluation methods often lack comprehensiveness and accuracy of construction site dust control, making it difficult to evaluate the actual control level and dust control effect of the construction site.

[0004] After searching, the following prior art is found: The patent specification with publication number CN109358163A discloses a construction site big data dust evaluation method based on big data, which includes the following steps: S1: obtaining particulate matter concentration data and meteorological data of the construction site through a dust monitoring and video monitoring system; S2: combining the dust condition monitored by the dust monitoring and video monitoring system and the on-site air quality, performing real-time over-standard early warning and control point data comparison; S3: using the air quality index calculation method in the standard, formulating a specific dust particulate matter quality monitoring index model, and calculating the monitoring data; S4: according to the calculation result, classifying the management of the concentration of dust particulate matter in the monitoring site; S5: starting the automatic spraying equipment of the construction site to reduce dust, and notifying the on-site supervision personnel through the network to take timely rectification measures; S6: combining the rectification implementation, evaluating and classifying whether the dust condition of the construction site is timely handled.

[0005] The patent specification with publication number CN118351459A discloses a method for evaluating the effectiveness of urban construction site and bare land dust control based on satellite remote sensing. The method includes the following steps: obtaining basic information data of dust sources as construction sites and bare land; obtaining dust control results of the target area; calculating the dust emission reduction amount of the target area under the control condition to evaluate the effectiveness of urban construction site and bare land dust control. The patent technology uses field photo data and satellite remote sensing prior knowledge data to obtain basic information data of dust sources as construction sites and bare land. It uses basic geographic information data of the target area, satellite remote sensing data and basic information data of dust sources as construction sites and bare land to obtain the dust control results of the target area. According to the basic information data of dust sources as construction sites and bare land and the dust control results of the target area, the dust emission reduction amount of the target area under the control condition is calculated, thereby realizing the evaluation of the effectiveness of urban construction site and bare land dust control. SUMMARY

[0006] The present application provides a method for evaluating the dust control level of construction sites based on multi-source data. A scientific and reasonable evaluation index system is established based on multi-source data, considering multiple indicators in the three-dimensional space of the construction site to avoid the limitations of single indicator evaluation. At the same time, the method supports regular updates, and the evaluation results can be visualized on the map, making it easy to understand the dust control status and changes of the dust control level of each construction site.

[0007] The specific technical solutions are as follows: A method for evaluating the dust control level of construction sites based on multi-source data, comprising: obtaining the construction stage of the construction site and the implementation of the dust control measures, to obtain the first evaluation result; combining the light quantum radar to obtain the average extinction coefficient of the construction site area, to obtain the second evaluation result; combining the unmanned aerial vehicle with particle sensors to monitor the particle concentration above the construction site, to obtain the third evaluation result; combining the road dust walking to monitor the road dust load data of the external road of the construction site, to obtain the fourth evaluation result; combining the first evaluation result, the second evaluation result, the third evaluation result and the fourth evaluation result to comprehensively evaluate the dust control level of the construction site.

[0008] The construction stage can be further subdivided according to the needs, and the dust control measure implementation index can be appropriately increased according to the local dust control requirements.

[0009] Further, the method for evaluating the dust control level of construction sites based on multi-source data, the construction stage includes the earthwork stage, the foundation engineering stage, the main engineering stage and the decoration engineering stage. The site dust control measures include construction enclosure, pavement hardening, dust cover, vehicle washing, wet operation and spoil transportation sealing; The calculation formula of the first evaluation result is:

[0010] Among them: is the site label; is the site first evaluation result; and represent the weight; , , , , , , The site construction stage, construction enclosure, pavement hardening, dust cover, vehicle washing, wet operation, and spoil transportation sealing of the site are respectively assigned results.

[0011] Further, the site dust control level evaluation method based on multi-source data is based on the extinction coefficient of the scanning area of the light quantum radar system, combined with the meteorological conditions of the site area, to obtain a second evaluation result. The light quantum radar system completes a circle of scanning in 8 minutes, and there are about 7 radar scan maps in 1 hour, and the data is representative.

[0012] The calculation formula of the second evaluation result is:

[0013]

[0014]

[0015] Among them: is the site label; is the total number of radar scan maps scanned by the light quantum radar system; , indicates the radar scan map label; is the second evaluation result of the site ; , indicates the grid label used to calculate the extinction coefficient. The 9 grids are the grid where the site center is located and the 3x3 grid centered on the grid; is the normalized extinction coefficient of the radar scan map in the grid , when is negative or the grid is not in the scanning area of the light quantum radar system, 0 is taken. Radar scan image Grid The extinction coefficient at ; Radar scan image The average extinction coefficient of Radar scan image Maximum value of the medium extinction coefficient; Radar scan image Minimum value of medium extinction coefficient; For the construction site based on An evaluation matrix of radar scan images; For the corresponding grid The coefficient is related to wind speed and direction. For example: the 9 grids used to calculate the extinction coefficient are numbered 1 to 9 in order from west to east and from north to south. That is, the northwest corner grid is numbered 1, the southeast corner grid is numbered 9, and the grid numbered 5 is the center grid of the 3×3 grid. The coefficients of the 3 grids opposite to the wind direction are 0. For example, in the case of northwest wind, 、 and The value of is 0, in the case of westerly wind, 、 and The value of is 0. If the wind speed is less than or equal to 2 m / s and it is a westerly wind, The value is 1 / 3, and The value is 1 / 12, and The value is 1 / 6, The value is 1 / 6. If the wind speed is greater than 2 m / s and less than or equal to 6 m / s, and in the case of westerly wind, The value is 1 / 4, and The value is 1 / 16, and The value is 3 / 16, The value is 1 / 4. If the wind speed is greater than 6 m / s and it is a westerly wind, The value is 1 / 5, and The value is 1 / 20, and The value is 3 / 20, The value is 2 / 5. The value of k in other wind directions is similar. Specifically, when the wind direction changes, the coefficient distribution can be adaptively changed according to the above rules. For example, in the case of east wind, south wind, and north wind, the numerical settings can refer to the above values, but the coefficient assignment of each grid is changed according to the relative position change.

[0016] Further, the third evaluation result is based on the horizontal and vertical meteorological correction PMs over the construction site 10 concentration is obtained.

[0017] Further, the third evaluation result is based on the horizontal and vertical meteorological correction PMs over the construction site 10 concentration is obtained based on the particulate matter concentration monitoring data at 40-70 meters (for example, 55 meters) above the ground over the construction site; vertical meteorological correction PMs over the construction site 10 concentration is obtained based on the particulate matter concentration monitoring data at 40-70 meters (for example, 55 meters) above the ground over the construction site;

[0018] Further, the third evaluation result is based on the horizontal and vertical meteorological correction PMs over the construction site

[0019]

[0020]

[0021]

[0022]

[0023]

[0024] wherein: is the construction site label; takes the value of 1 or 2; is the third evaluation result of the construction site ; and represent the weight; is the PM concentration score result in the horizontal direction over the construction site 10 ; is the PM concentration score result in the vertical direction over the construction site 10 ; is the horizontal meteorological correction PM concentration over the construction site 10 ; is the vertical meteorological correction PM concentration over the construction site 10 ; Data sequence number after starting to have monitoring data in the horizontal direction; Sequence number Corresponding horizontal direction weather correction PM 10 Concentration; Sequence number Corresponding horizontal direction PM 10 Concentration; Construction site Upwind background point PM 10 Concentration; Wind direction-wind speed correction function, wherein The angle between the connecting line of the background point and the unmanned aerial vehicle position and the wind direction at the background point, 0° represents the direct upwind direction, Wind speed, unit m / s; Wind direction fluctuation standard deviation; Reference wind speed; Constant for preventing zero division; , , , The PM in the vertical direction of the four end points (i.e. vertical measurement points) on the unmanned aerial vehicle cruise path respectively 10 Average concentration; , , , Weight coefficient; Reference PM 10 Concentration standard value.

[0025] Further, the construction site dust management and control level evaluation method based on multi-source data is designed to cover the grid area above the construction site, select all grids containing the area above the construction site, take the boundary and / or center connecting line of the selected grid as the unmanned aerial vehicle cruise path, and the unmanned aerial vehicle cruise path under the overhead perspective is a non-repeating snake-shaped closed loop path, so that the coverage area is more comprehensive, and the data is more accurate., considering the meteorological data to correct the monitoring data to obtain a third evaluation result.

[0026] The third evaluation result of the present application considers three-dimensional space, so that the construction site coverage is more comprehensive, and by reasonably planning the path, the flight time can be reduced, and the efficiency of the construction site dust management and control level evaluation is improved.

[0027] The road dust load data is mainly based on the road dust load monitoring equipment meeting the requirements of “Road Dust Load Vehicle Mobile Monitoring and Evaluation Technical Specification” (DB11 / T 1926-2021), and the monitoring work is carried out on the external road of the main construction site exit.

[0028] Further, the fourth evaluation result is obtained based on the average dust load of the external road 50 m away from the main entrance and exit of the construction site and the average dust load of the four roads of the construction site.

[0029] Further, the fourth evaluation result is obtained based on the average dust load of the external road 50 m away from the main entrance and exit of the construction site and the average dust load of the four roads of the construction site.

[0030]

[0031] Wherein: is the construction site label; is 1 or 2; is the fourth evaluation result of the construction site . and represent the weight; is the dust score result of the external road 50 m away from the main entrance and exit of the construction site . is the road dust score result of the four roads of the construction site . is the average dust load of the external road 50 m away from the main entrance and exit of the construction site . is the average dust load of the four roads of the construction site .

[0032] Further, the comprehensive evaluation result is calculated according to the following formula:

[0033] Wherein: is the construction site label; is the comprehensive evaluation result of the construction site . , , and represent the weight; is the first evaluation result of the construction site . is the second evaluation result of the construction site . is the third evaluation result of the construction site . is the fourth evaluation result of the construction site .

[0034] Further, the comprehensive evaluation result can be calculated according to the following formula: Size, all construction sites are visualized by color division through mapping software (such as ArcGIS, etc.).

[0035] The present application aims to improve the accuracy and comprehensiveness of the evaluation. The method of the present application comprehensively uses field investigation, particulate matter radar identification, unmanned aerial vehicle cruising monitoring and road dust walking, etc. to obtain data such as construction stage of construction site, implementation of dust control measures, radar scanning extinction coefficient, overlying particulate matter concentration and surrounding road dust load, etc. At the same time, the field investigation results of the construction site, the ground and high-altitude data are considered to construct a scientific and reasonable evaluation index system.

[0036] The present application adopts a weight distribution scoring mechanism, reasonably allocates weight coefficients according to the importance of each index, ensures the scientificity and fairness of the evaluation results, and effectively avoids the limitations that may be caused by single index evaluation.

[0037] In addition, the present application supports regular updating and visual display of the dust control level of the construction site, which facilitates intuitive understanding of the current situation and changing trend of the dust control of the construction site, provides solid data support for formulating effective dust control strategies, and helps environmental protection departments or law enforcement agencies to more effectively perform their duties.

[0038] Compared with the prior art, the present application has the following beneficial effects: The present application evaluates the construction stage and dust control measure implementation of the construction site through field investigation, and comprehensively evaluates the dust control level of the construction site through the extinction coefficient of the light quantum radar scanned area, the overlying unmanned aerial vehicle monitoring data and the road dust data of the road outside the construction site. Based on multi-source data, the dust control level of the construction site can be more reasonably fed back. Through rapid updating of data (the light quantum radar system can complete a circle of scanning in about 8 minutes), the dust control level and difference of the construction site can be compared in time and space, and the dust control difference of different construction sites in the same construction stage can also be compared, which facilitates the environmental protection department or law enforcement agency to master the dust control status and change of the construction site in the region. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A multi-source data-based construction site dust control level evaluation method provided in the specific embodiment.

[0040] Figure 2 A grid method for radar scanning of a construction site provided in the specific embodiment.

[0041] Figure 3 A route planning diagram for unmanned aerial vehicle cruising of a construction site provided in the specific embodiment.

[0042] Figure 4A multi-source data-based construction site dust control level evaluation result case graph is provided in the specific embodiment. DETAILED DESCRIPTION

[0043] The application will be further described below in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the application and not to limit the scope of the application.

[0044] The multi-source data mentioned in the application can be investigated and monitored according to different orders according to actual conditions. In order to avoid large data deviation, it is recommended that the unmanned aerial vehicle monitoring and road dust load monitoring be completed as much as possible in the same period. A multi-source data-based construction site dust control level evaluation method provided by the application is described in detail below.

[0045] As shown in Figure 1 A multi-source data-based construction site dust control level evaluation method, including the acquisition of field investigation, radar response, high-altitude pollution and road dust data, evaluating the construction site dust control level through multi-source data, specifically including the following steps: S1: Investigate the site, including the construction site construction stage and the implementation of the construction site dust control measures, and obtain the first evaluation result.

[0046] Further, the construction site construction stage includes four main construction stages of earthwork stage, foundation engineering stage, main engineering stage and decoration engineering stage. According to the type of construction stage, 0, 0.2, 0.5 and 1 points are respectively given.

[0047] Further, the implementation of the construction site dust control measures, including investigation of the construction site, including checking whether the construction site construction fence, pavement hardening, dust covering, vehicle washing, wet operation, and slag transportation are up to standard. ① The construction site construction fence requires that the height of the construction fence on the main road section shall not be less than 2.5 m, and the height of the construction fence on the general road section shall not be less than 1.8 m. If it meets the requirements and 100% of the fence, 1 point is given; if part of the fence (more than 50%), 0.3 points are given; otherwise, 0 points are given. ② The pavement hardening requires that 100% of the main road is hardened, and 1 point is given if it meets the requirements; if part of the road is hardened (more than 50%), 0.3 points are given; otherwise, 0 points are given. ③ The dust covering requires that the dust covering is up to standard, and 1 point is given if it meets the requirements; if part of the material is covered (more than 50%), 0.3 points are given; otherwise, 0 points are given. ④ The vehicle washing requires that the vehicle is washed before leaving the site, and 1 point is given if the vehicle body is clean; otherwise, 0 points are given. ⑤ The wet operation requires that the wet operation is used for the dust raising operation such as earth excavation, transportation and loading, and 1 point is given if it meets the requirements; otherwise, 0 points are given; if it does not involve the dust raising operation such as earth excavation, transportation and loading, 1 point is given. ⑥ The slag transportation requires that the slag transportation is 100% sealed, and 1 point is given if it meets the requirements; otherwise, 0 points are given; if it does not involve the slag transportation, 1 point is given.

[0048] Table 1 is a score table for the implementation of the construction site dust control measures.

[0049] Table 1

[0050] Further, the construction site construction phase and the construction site dust control measures are scored, and the calculation formula is:

[0051] wherein: is the construction site label; is the first evaluation result of the construction site ; and represent the weight, which is 0.2 and 0.8, respectively; , , , , , , are the score results of the construction site construction phase, construction fence, pavement hardening, dust covering, vehicle washing, wet operation, and slag transportation.

[0052] S2: Radar response situation, statistics of the average extinction coefficient of each construction site light quantum radar scan map, the second evaluation result is obtained, and the light quantum radar system completes a circle scan in 8 minutes, and there are about 7 radar scan maps in 1 hour, the data is representative.

[0053] Based on the light quantum particulate matter radar, the average extinction coefficient of the nine grids in the area above the construction site in different radar scan maps is calculated, and the grid distribution is as shown in Figure 2 At the same time, different wind directions and wind speeds are considered, and different coefficients are given to different grids. If the wind direction is west wind, select 2, 3, 5, 6, 8, 9 grids under the diffusion of wind direction as the grid for calculation, and the rest of the grid number corresponds to the coefficient of 0; If the wind direction is northwest wind, select 3, 5, 6, 7, 8, 9 grids under the diffusion of wind direction as the grid for calculation, and the rest of the grid number corresponds to the coefficient of 0.

[0054] For the coefficient value that is not zero, if the wind speed is less than or equal to 2 m / s, and in the case of west wind, The value is 1 / 3, And The value is 1 / 12, And The value is 1 / 6, The value is 1 / 6, if the wind speed is greater than 2 m / s and less than or equal to 6 m / s, and in the case of west wind, The value is 1 / 4, And The value is 1 / 16, And The value is 3 / 16, The value is 1 / 4, if the wind speed is greater than 6 m / s, and in the case of west wind, The value is 1 / 5, And The value is 1 / 20, And The value is 3 / 20, The value is 2 / 5. The coefficient value is similar in other wind directions.

[0055] The calculation formula of the second evaluation result is:

[0056]

[0057]

[0058] Among them: is the construction site label; Total number of radar scan maps scanned by the light quantum radar system; , indicates the label of the radar scan map; is the second evaluation result of the construction site ; , indicates the grid label for calculating the extinction coefficient, the 9 grids are the grid where the construction site center is located and the 3x3 grid centered on the grid; is the extinction coefficient of the radar scan map after standardization in the grid , when is negative or the grid is not within the scanning area of the light quantum radar system, 0 is taken; is the extinction coefficient of the grid of the radar scan map ; is the average extinction coefficient of the radar scan map ; is the maximum extinction coefficient in the radar scan map ; is the minimum extinction coefficient in the radar scan map ; is the evaluation matrix of the construction site based on radar scan maps; is the coefficient corresponding to the grid , which is related to wind speed and direction.

[0059] S3: High-altitude pollution, statistics and calculation of meteorological correction PM 10 concentration data in the horizontal and vertical directions above each construction site, to obtain the third evaluation result.

[0060] Mainly based on unmanned aerial vehicles carrying particulate matter sensors. For example, the unmanned aerial vehicle uses DJI Mavic 3E unmanned aerial vehicle, equipped with Lingxian Mini2 unmanned aerial vehicle-mounted multi-gas monitoring sensor. First, select national or provincial air quality stations in urban areas, and calibrate sensor data through station air quality data. Second, according to the area and range characteristics of the construction site, plan the unmanned aerial vehicle route, cover the entire construction site in the grid, and conduct unmanned aerial vehicle patrol in the 55 m area above the construction site, and monitor the PM 10 concentration in the air at the same time.

[0061] If the construction site is an irregular block, take the longest side of the construction site as the reference line, and the side along the horizontal center line of the lowest grid (40 m x 40 m, which can be adjusted according to the size of the specific construction site, and the grid size of all construction sites is uniform), to ensure that all grids can completely cover the entire construction site, such as Figure 3as shown.

[0062] If the number of the lowest grids is even, take the leftmost grid as the starting point, and gradually move along the grid midpoint to the rightmost grid, and finally return to the initial grid midpoint. Figure 3 (a) The reference patrol route in the horizontal direction, taking the midpoint of the bottom edge of the leftmost grid as the starting point, gradually conducting patrol along the grid midpoint, and finally returning to the initial grid midpoint.

[0063] If the number of the lowest grids is odd, take the leftmost grid as the starting point, and gradually move along the grid midpoint to the rightmost grid, and finally return to the initial grid midpoint. Figure 3 (b) The reference patrol route in the horizontal direction, taking the left bottom endpoint of the first column grid as the starting point, moving along the left edge of the grid to the left top endpoint of the uppermost grid, then to the left top endpoint of the uppermost grid of the second column, then to the left top endpoint of the lowermost grid of the second column, then gradually to the right bottom endpoint of the lowermost grid of the last column, and finally returning to the initial position.

[0064] For the vertical direction route, refer to Figure 3 (c) For the endpoints A, B, C, and D on the horizontal patrol route, conduct vertical flight (the takeoff process at point A is completed monitoring), and the other three points need to be lowered to a certain height and then raised to the corresponding point. Horizontal and vertical flight are carried out simultaneously in one flight mission.

[0065] After the sensor data is stable, start the flight mission, rise to the upper air of the construction site, the height is 55 m (uniform height can be used, recommended 40-70 m), control the horizontal flight speed to be 5 m / s (recommended 4-6 m / s), keep the height unchanged. After reaching the corresponding endpoint, lower by 25 m and then raise by 25 m to the initial position of lowering. If higher buildings are encountered in the actual process, adjust the patrol route according to the actual situation.

[0066] According to the PM 10 concentration data on the patrol route in the upper air of the construction site, comprehensive score is carried out, and the calculation formula is:

[0067]

[0068]

[0069]

[0070]

[0071]

[0072] Among them: is the construction site label; the value is 1, 2; is the third evaluation result of the construction site ; and weight; for the work site PM in the horizontal direction in the upper air 10 concentration score result; for the work site PM in the vertical direction in the upper air 10 concentration score result; for the work site weather-corrected PM in the horizontal direction in the upper air 10 concentration; for the work site weather-corrected PM in the vertical direction in the upper air 10 concentration; data sequence number after which there is monitoring data in the horizontal direction; sequence number corresponding weather-corrected PM in the horizontal direction 10 concentration; sequence number corresponding PM in the horizontal direction 10 concentration; for the work site upwind background point PM 10 concentration, which can be taken as the PM at the horizontal flight height of the four end points (for example, A, B, C, and D) on the UAV cruise path 10 concentration value, for example, if the route of the two end points A and B on the west side is northward, the background point is the midpoint of the two end points A and B on the west side under the condition of west wind, and the value is the PM at the horizontal flight height of the two end points 10 average concentration, if it is northwest wind, the background point is the PM at the horizontal flight height of the end point B in the northwest 10 concentration value; wind direction-wind speed correction function, wherein is the included angle between the line connecting the background point and the UAV position and the wind direction at the background point (0° represents the direct upwind direction), is the wind speed, in m / s; is the wind direction fluctuation standard deviation (characterizing diffusion stability, such as 15° for stable atmosphere (night / inverse temperature), 25° for neutral atmosphere (overcast day), and 35° for unstable atmosphere (sunny afternoon)); is the reference wind speed, for example, 2 m / s; is a constant for preventing division by zero, for example, 0.1 m / s; , , , are respectively the PM in the vertical direction of the four end points (i.e., vertical measurement point positions) on the UAV cruise path 10 average concentration; , , , is a weight coefficient, the value is related to the wind direction, for example, if the route of the two endpoints AB on the west side is north, the value of the west wind is 0, 0, 1 / 2, 1 / 2 respectively, and the value of the northwest wind is 0, 0, 0, 1 respectively. 、 、 、 is a reference PM 10 concentration standard value, for example, based on the local standard “Construction site dust emission standard” (DB 13 / 2934-2019) of Hebei Province, the hourly PM 10 concentration of construction site dust emission is not higher than 80 μg / m 3 .The evaluation method of the embodiment may be 80.

[0073] S4: Road dust condition, statistics of road dust load data of each construction site external road, to obtain the fourth evaluation result.

[0074] The road dust load monitoring equipment needs to meet the requirements of “Road dust load vehicle-mounted mobile monitoring and evaluation technical specification” (DB11 / T 1926-2021), and the monitoring work is carried out on the external roads of the main entrances and exits of the construction site. After completing the walk-by monitoring, the average value of the dust load of the external roads of each 50 m on both sides of the construction site entrance and exit (if there are multiple entrances and exits, take the average value) and the average value of the dust load of the roads of the four directions of the construction site (only consider the roads convenient for vehicles to enter) are calculated.

[0075] According to the average value of the dust load of the external roads, the calculation formula is:

[0076]

[0077] Among them: is the construction site label; the value is 1, 2; is the fourth evaluation result of the construction site ; and represent the weight, which are 0.8 and 0.2 respectively; is the dust score result of the external roads of each 50 m on both sides of the main entrance and exit of the construction site ; is the road dust score result of the roads of the four directions of the construction site ; is the average value of the dust load of the external roads of each 50 m on both sides of the main entrance and exit of the construction site ; is the average value of the dust load of the roads of the four directions of the construction site .

[0078] S5: The comprehensive evaluation level value (i.e. the comprehensive evaluation result) of the construction site is calculated according to the following formula:

[0079] Wherein: is the construction site label; is the comprehensive evaluation result of the construction site; indicate the weights, which are 0.4, 0.2, 0.2 and 0.2 respectively; is the first evaluation result of the construction site; is the second evaluation result of the construction site; is the third evaluation result of the construction site; is the fourth evaluation result of the construction site. In summary, the value is 0-1. The closer the value is to 1, the higher the construction site dust control level and the better the dust control effect. According to the value size, the construction site is divided by color, and the construction site marked in red needs to strengthen the construction site dust control. At the same time, all construction sites can be marked in ArcGIS or other map software to realize the visual display of the construction site dust control situation (Fig. 6). Or directly based on the comprehensive evaluation level value, without using the color division table in Table 2, using hierarchical color mapping, according to the color depth to evaluate the construction site dust control level in the region.

[0080] Table 2 is a color division table of the construction site dust control level. Table 2 Figure 4

[0081]

[0082] Table 2

[0083] After the initial assessment of the three-color control level of the construction site, the implementation of the rectification of each construction site can be regularly evaluated, the data can be updated through the evaluation method of the present application (wherein the light quantum radar system completes a circle scanning in 8 minutes, which can realize the rapid updating of the evaluation data), the dust control level of the construction site is re-evaluated and graded, and the change of the dust control level of different construction sites is analyzed through the comparison of the evaluation results.

[0084] The above provides a detailed introduction to the construction site dust control level evaluation method based on multi-source data. The weight coefficient provided in the method can be selected again according to the actual situation and the importance level, or the weight can be determined by expert scoring method. ​​​​​​​​

[0085] It is to be understood that while the application has been described above with reference to particular embodiments, the application can be implemented differently. It is therefore desired that the present application be limited only by the scope of the appended claims, each example given only to illustrate a specific embodiment of the application.

Claims

1. A method for evaluating construction site dust control levels based on multi-source data, characterized in that: include: Obtain the status of the construction phase and implementation of dust control measures at the construction site to obtain the first assessment results; Combined with the optical quantum radar, the average extinction coefficient of the construction site area is obtained to obtain the second evaluation result; The third assessment result was obtained by using drones equipped with particle sensors to monitor particle concentrations above the construction site. Combined with the road dust navigation, the road dust load data of the roads outside the construction site is monitored to obtain the fourth assessment result; Based on the first, second, third and fourth assessment results, a comprehensive assessment of the dust control level at the construction site is conducted.

2. The method for evaluating construction site dust control level based on multi-source data according to claim 1 is characterized in that: The construction phases of the construction site include earthwork phase, foundation phase, main body phase and decoration and renovation phase; Dust control measures at construction sites include construction fencing, road hardening, dust-proof covering, vehicle washing, wet working, and sealed transportation of waste soil; The calculation formula for the first evaluation result is: ； in: For construction site labels; For the construction site First assessment results; and represents weight; 、 、 、 、 、 、 Construction sites The scoring results for the construction stage of the construction site, construction fencing, road hardening, dust-proof covering, vehicle washing, wet operations, and closed transportation of waste soil.

3. The construction site dust control level assessment method based on multi-source data according to claim 1 is characterized in that: The second assessment result is obtained based on the extinction coefficient of the optical quantum radar system in the scanning area and the meteorological conditions of the construction site area; The calculation formula for the second evaluation result is: ； ； ； in: For construction site labels; The total number of radar scan images obtained by the optical quantum radar system; , represents the radar scan image label; For the construction site The second assessment results; , which represents the grid label used to calculate the extinction coefficient. These 9 grids are the construction site The grid where the center is located and the 3×3 grid centered on the grid; Radar scan image In the grid The normalized extinction coefficient is Negative value or grid When not in the scanning area of ​​the optical quantum radar system, Take 0; Radar scan image Grid The extinction coefficient at ; Radar scan image The average extinction coefficient of Radar scan image Maximum value of the medium extinction coefficient; Radar scan image Minimum value of medium extinction coefficient; For the construction site based on An evaluation matrix of radar scan images; For the corresponding grid The coefficient is related to wind speed and direction.

4. The method for evaluating construction site dust control level based on multi-source data according to claim 1, characterized in that: The third assessment result is based on the meteorologically corrected PM2.5 in the horizontal and vertical directions above the construction site. 10 Concentration obtained.

5. The method for evaluating construction site dust control level based on multi-source data according to claim 4 is characterized in that: Meteorologically corrected PM in the horizontal direction above the construction site 10 The concentration is calculated based on the particle concentration monitoring data at 40 to 70 meters above the construction site; Weather-corrected PM in the vertical direction above the construction site 10 The concentration is calculated using the particle concentration monitoring data from multiple vertical measurement points. The particle concentration monitoring data from the vertical measurement points is obtained by the drone cruising to the set vertical measurement point and then descending and / or ascending a certain distance.

6. The method for assessing construction site dust control levels based on multi-source data according to claim 4 or 5, characterized in that: The calculation formula for the third evaluation result is: ； ； ； ； ； ； in: For construction site labels; The value is 1 or 2; For the construction site The third assessment results; and represents weight; For the construction site PM in the horizontal direction above 10 Concentration score results; For the construction site PM in the vertical direction above 10 Concentration score results; For the construction site Horizontal weather correction PM 10 concentration; For the construction site Vertical weather correction PM 10 concentration; It is the data sequence number after the monitoring data starts in the horizontal direction; For serial number Corresponding horizontal weather correction PM 10 concentration; For serial number Corresponding horizontal PM 10 concentration; For the construction site Upwind background point PM 10 concentration; is the wind direction-speed correction function, where It is the angle between the line connecting the background point and the UAV position and the wind direction at the background point. 0° means the upwind direction. is the wind speed, in m / s; is the standard deviation of wind direction fluctuation; is the reference wind speed; A constant used to prevent division by zero; 、 、 、 They are the PM in the vertical direction of the four endpoints on the UAV cruising path. 10 average concentration; 、 、 、 is the weight coefficient; PM for reference 10 Concentration standard value.

7. The method for evaluating construction site dust control level based on multi-source data according to claim 1, characterized in that: The design can cover the grid area above the construction site. All grids including the area above the construction site are selected, and the boundaries and / or center lines of the selected grids are used as the drone cruising path. The drone cruising path is a non-repeating serpentine closed-loop path from a bird's-eye view. At the same time, the monitoring data is corrected considering meteorological data to obtain the third evaluation result.

8. The method for evaluating construction site dust control level based on multi-source data according to claim 1, characterized in that: The fourth evaluation result is obtained based on the average dust load of the external roads 50 m on both sides of the main entrance and exit of the construction site and the average dust load of the roads around the construction site.

9. The method for assessing construction site dust control levels based on multi-source data according to claim 8, characterized in that: The calculation formula for the fourth evaluation result is: ； ； in: For construction site labels; The value is 1 or 2; For the construction site The fourth assessment results; and represents weight; For the construction site Dust accumulation scoring results of the 50 m external roads on both sides of the main entrances and exits; For the construction site Road dust score results for the four roads; For the construction site Average dust load of the external roads 50 m on both sides of the main entrances and exits; For the construction site The average dust load of the four roads.

10. The method for evaluating construction site dust control level based on multi-source data according to claim 1, characterized in that: The calculation formula for the comprehensive evaluation results is: ； in: For construction site labels; For the construction site Comprehensive evaluation results of 、 、 and represents weight; For the construction site First assessment results; For the construction site The second assessment results; For the construction site The third assessment results; For the construction site The fourth assessment results; according to Size, all construction sites are visually displayed on the map software through color division.

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