The air quality of urban environment is an important factor to improve the happiness index of residents. The implementation of dust control in construction sites is not only a key step to win the blue sky defense war, but also closely related to the lives of ordinary people. The number of construction sites 100%, we should pay special attention to the prevention and control of dust pollution in construction sites.

A, the construction site 100% enclosure.

(1) General provisions on fences

1. Before the construction site starts, a compound wall (construction enclosure) must be continuously set around the construction site, and hard raw materials such as colored steel tiles and filler walls shall be used for erection, and the safety of construction workers and nearby passers-by shall be ensured. It is planned to use continuous and closed prefabricated light steel structural members to assemble the construction enclosure for building theme activities, so as to reduce urban garbage and protect the ecological environment.

2. The surrounding raw materials are durable, and the appearance design is beautiful and generous; The courtyard wall (entrance and exit of the site gate) is marked with the project name, infrastructure (agent construction), construction, project supervision, survey and design scheme enterprises and regulatory agencies, and is equipped with the words related to quality, safety and civilized behavior construction publicity. Construction signs are generally hung on the wall on the right side of the gate of the construction site, with a height of1.8m..

3. Carry out the publicity system of dust pollution control information content on construction sites. All construction enterprises should publicize the general situation of the project, the countermeasures for dust pollution control, the details of off-road mobile machinery and equipment, the name of the multi-obligation company for capital construction and the name of the project manager, and the complaint telephone number of the company and the competent authorities in relevant fields in the city where the project is located on the fence of the construction site.

4. For projects with a construction period of more than half a year, a continuous closed courtyard wall must be selected. The wall is made of 20 cm thick bricks, and the enclosure height is not less than 2.5 meters or the enclosure is made of prefabricated building materials; During the construction period, the continuous closed construction enclosure with a height of not less than 2.5 meters shall be selected for the project after the rectification period 15 days, and the baffle shall be supported by angle steel, and the distance between the C-shaped steel column and the soil and steel beam on the pavement shall not exceed 3.3 meters; The construction period is less than 15 days, and the standard fastening steel guardrail (MOS rail) is selected for enclosure; It is stipulated in the crosswalk construction of municipal engineering that the enclosure should adopt transparent enclosure raw materials.

(ii) Practical provisions on enclosure

1. Provisions for the enclosure of prefabricated building raw materials: (1) The enclosure raw materials are durable and the design is beautiful and generous; (2) Use standard plates to erect poles, and the spacing between steel beams shall not exceed 3.3m(3 (3) Choose a brick wall with a height of 20cm and a thickness of 20cm to enclose footstones to prevent sludge and dirt from leaking from the baffle; (4) The top of the column is equipped with _LED lighting, about 6m/lamp; (5) An automatic sprinkler system shall be set above the courtyard wall.

2. Provisions for the setting of the infilled wall-type solid-line courtyard wall: (1) build a corner and a column wall, the height of the corner is not less than 50 cm, and tiles are pasted on both sides of the corner and the column wall, and the spacing between the column walls is not more than 3 meters. Install round led energy-saving lamps at the top of column caps every 6 meters, and the working voltage should be less than 36V, and take certain effective measures to ensure the safety of electricity consumption, and polish and clean the external wall tiles; (2) The wall thickness shall not be less than 180mm. When the length of one side of the wall exceeds 50m, deformation joints should be set at 20-30m, and pilasters should be set every 3-5m along the wall. (3) An automatic sprinkler system is set above the courtyard wall.

3. Safety appraisal. (1) Signs of "Pay attention to deceleration in pavement construction" and "Speed limit of XX kilometers" shall be set according to the direction of traffic flow. When occupying roads, signs should also be set to correctly guide vehicles to change lanes. Warning zone, upstream and downstream junction zone, upstream and downstream buffer zone, construction zone, middle and lower buffer zone and middle and lower junction zone shall be set in the construction enclosure zone, front, rear, left and right, and occupied construction zone, and "construction vehicles should slow down" shall be set in the warning zone. (2) The walls and boards adjacent to the carriageway shall be affixed with reflective stickers at the top, middle and bottom of the walls. Considering that the city stipulates that advertising signs should be posted on the wall, reflective stickers and advertising signs can be set at intervals; (3) Set warning lights for construction at night at intervals of about10 ~15m between the retaining wall and the top of the slab; (4) Occupy the closed area of pavement construction, and set yellow lights and anti-collision piers at the beginning and end of the car-facing surface; (5) On both sides of the fence and the wall adjacent to the carriageway, steel crash barriers shall be set at intervals of no more than one meter.

4. Exterior wall decoration regulations. According to the unified regulations of the municipal government supervision room (subject to this), post public service advertising videos or slogans. , can be properly posted in the enterprise poster newspaper. The proportion of the total area of public service advertising videos to the building enclosure area is not less than 30%. The public service advertisement video of the construction enclosure shall be cleaned, maintained and maintained on time, and the damaged video shall be removed and replaced immediately.

5. Enclose the intersection along the coast, and set a transparent partition within 30 meters of the edge according to the regulations of the traffic control department (refer to the figure below).

(3) Maintenance and replacement

1. If the facade of the courtyard wall is damaged, it shall be replaced or repaired immediately. If the posters or advertisements outside the courtyard walls are worn out, they should be renovated. The facade and advertising posters of the baffle building should be maintained, cleaned and replaced to keep the facade of the baffle building clean, tidy and fresh.

2. At ordinary times, it is necessary to assign full-time personnel to patrol and maintain closed raw materials that are easy to move, such as iron horses, water horses and steel guardrails, and carry out rectification anytime and anywhere; Iron shell raw materials should be maintained at least once every six months, coated with antirust paint, and some brittle raw materials such as plastics should be removed and replaced immediately.

(4) Deep foundation pit enclosure

1. Deep foundation pit enclosure has strict specifications and refinement. Generally, a customized protective fence should be applied, instead of seamless steel pipe and emerald safety net, it should be closed with seamless steel pipe and emerald safety net as standard.

2. The enclosure adopts standardized steel guardrail, and the height is not less than 1. 2m, guardrail column spacing shall not exceed 2 m.. Guardrail column should be anchored by foundation reinforcement, and foundation line (20cm high) should be set.

3. The spacing between the bars of Geshan fence shall not exceed 15cm.

Second, the ground 100% hard foundation.

(1) concrete with a thickness of not less than 20cm and a compressive strength of not less than C 15 should be poured for hardening in the safe passage outside the gate, the pavement between temporary equipment rooms, the raw material storage yard, the building steel processing factory and the pavement of the warehouse, and the total width of the safe passage for motor vehicles should be not less than 3.5m ..

(2) Precast concrete members or thick steel plates that can be reused for many times are used in the construction site for paving technology, and all-round hardening is carried out.

(3) Within the high-speed service area of daily life, strictly follow the relevant requirements of civilized behavior construction management measures on the engineering construction site, and take all-round ground hardening countermeasures to improve sprinkling and dust suppression.

(four) the construction surface of the traffic category (including natural foundation, subgrade engineering, deep foundation pit surface, slope protection, construction access road, etc.). ). In the foundation pit of the construction site, the construction access road should be filled with gravel, thick steel plate or other raw materials immediately to avoid dust. When the construction reaches 0.00, the construction pavement must be hardened. When implementing the hardening standard of cement concrete in the construction site, the ground hardening countermeasures should be selected as far as possible. When the hard bottoming countermeasure cannot be applied, the following technical measures should be selected to control dust:

1. If the construction delay is within 15 days, water spraying and pollution prevention measures should be taken;

2. If the delay time of the construction operation is 15 to 3 months, the surface layer should be sprayed with clear moisturizing emulsion or other surface layer dry solid raw materials, and the pollution prevention countermeasures of spraying water should be improved;

3. If the delay time of construction operation exceeds 3 months, anti-pollution measures should be taken to improve the soil (the mixture should be spread and rolled on site after centralized mixing or sprayed with moisturizing emulsion, and mixed and rolled on site with mechanical equipment); The paving thickness and the amount of moisturizing emulsion are determined according to the construction working space, the size and total number of construction vehicles.

III. Gravel soil of the site, covered with raw materials 100%.

(a) the residual soil and urban garbage should be concentrated, classified and piled up, and should be covered tightly. The construction site should be equipped with a closed garbage pool, and it is forbidden to throw it at high places; If the exposed soil on the non-construction operation surface or the mound temporarily stored is not used for 3 months, dust suppression measures such as covering, tamping and sprinkling should be taken.

(two) the temporary coverage of urban garbage such as waste soil and waste materials can be covered with woven bags or nets. (3) After the excavation of the foundation pit of the engineering building, it should be backfilled as soon as possible. If it cannot be backfilled immediately, countermeasures such as covering or dry consolidation should be taken.

(4) For the exposed gravel soil, you can choose to cover or close the silo with a full net.

IV. Construction Project 100% Sprinkling (Project Demolition 100% Sprinkling for Dust Removal)

(a) the demolition project must take the countermeasures of sprinkling and dust removal. When the weather reaches level 5, the demolition of the project should be terminated. The residual soil shall be removed or covered immediately, and the garbage shall be removed within 3 days from the effective date of the demolition construction, and shall be implemented in accordance with the relevant requirements of the Management Measures for Project Demolition.

(2) Automatic sprinkler system setting (the key lies in the setting of new projects)

1. Location: above the courtyard wall of the construction site; Foundation construction and earthwork backfilling near deep foundation pit; When it comes to foundation pit construction, an automatic sprinkler system should be set on each concrete support point; The behavior of straight grid and lifting steel pipe scaffold in the main building; The automatic spraying system should be set in the position where dust is easy to produce, such as crane; Urban road construction asphalt pavement engineering; Demolition engineering, blasting engineering, ready-mixed dry powder mortar construction; Building envelope of buildings and municipal engineering; The dust pollution control measures such as sprayers, self-spraying or sprinkling water should be taken in the key roads or construction links of the construction site.

2. Provisions on the setting of automatic sprinkler system: the layout spacing of deep foundation pit backfilled by earthwork is 1.5m, the nozzle size is 4cm, and the layout category is close to the deep foundation pit; There is a straight grid structure, and an automatic spraying system is set every 3 meters, and the nozzle size is 4 cm. The standard first line is set at15-20m, and then a line is set every 25m; The distance between the outfield of the site fence and the key road surface of the site is 3m, and the nozzle size is set in a circle of 4cm; Other construction operations prone to dust should be equipped with corresponding spray cooling equipment or sprinkling water for dust removal according to the pollution degree of dust environment.

3. Open the automatic sprinkler system or sprinkling and dust removal program. According to the dust situation in the construction site, water shall be sprinkled at least four times a day, and the sprinkling time along the construction pavement is: 7:30-8:00 am, afternoon11:00-12: 00, afternoon14: 30-/kloc-0. When there is more dust and air pollution, it should be distributed more than 6 times from June 65438 to February of the following year; Press this button to turn on the automatic sprinkler system _ _ _ _ _ _ _ _ _ The total traffic volume of the infield road surface is higher than the ground, with 4 passengers every 30 minutes, and the whole road surface is kept wet.

4. Responsibility implementation. Daily sprinkling, opening automatic sprinkler system and spray cooling equipment shall be the responsibility of full-time personnel, and a professional register shall be established, which shall be recorded and signed by the responsible person.

(3) Equipment setting of fog gun. During earthwork backfilling, add 1 fog gun mechanical equipment at a distance of 30-50m from the deep foundation pit. Regulations on qualified dust: During earthwork backfilling, the dust height in the operation area is expected to be lower than 1.5m, and it will not spread outside the province; In the structural construction and safety building decoration, the estimated dust height in the working area is less than 0.5m; Provisions on estimating no dust in non-working area of construction site. Outside this specification, the fog gun equipment and automatic spraying system are designated as open.

(4) Air index monitoring equipment such as PM2.5 monitoring instruments should be installed on the construction site, which can be connected to the video monitoring system of the competent department in a standard way, and the data monitoring should be submitted to the municipal dust monitoring platform (built in the Environmental Protection Bureau). When the concentration of PM 10 exceeds 200mg/ m3 or the concentration of PM2.5 exceeds 100mg/ m3, the fog gun equipment and automatic spraying system should be turned on.

5. 100% of vehicles leaving the construction site washed the wheel body.

(1) Full-time personnel shall be assigned to clean and file vehicles at the entrance and exit of the construction site, and the tires and body surfaces of vehicles entering and leaving the construction site shall be thoroughly cleaned and kept clean before entering and leaving the construction site.

1. Specification for vehicle cleaning cleanliness: The tires and body surfaces of transport vehicles entering and leaving the construction site should be thoroughly desliming to ensure that there is no yellow sand when the vehicles leave the construction site.

2. Establish a ledger for the management measures of dump trucks, and record the information content of vehicle certificates, information content of entry and exit, cleaning status and sealing status in detail. Every time the vehicle is cleaned, the license plate number, driver's name, room access and other information of vehicles entering and leaving the site should be recorded. After the vehicle is cleaned, the driver and the cleaner shall sign, and the person in charge of the construction unit shall check the vehicle cleaning condition at any time.

3. In the process of transporting surplus mud at the construction site, the construction enterprise shall assign professional management personnel to be responsible for transporting construction waste, and undertake the loading inspection of surplus mud and "no entry, no going out" ("no entry" means resolutely prohibiting vehicles without Guangzhou Construction Waste Transport Certificate from entering the construction site; "Three prohibitions" refers to the implementation of relevant rules and regulations such as overweight, uncovered, unwashed and clean wheeled vehicles, and resolutely prohibits them from leaving the construction site.

4. Some effective measures must be taken to transport the vehicles with residual mud from engineering construction, so as to ensure the cleanliness of the vehicles. The loading height of earthwork backfilling shall not exceed the standard height of the outer wall of the transport vehicle; The steel rear cover plate of the vehicle must be parallel to the chassis, and the viewing angle shall not be skewed; Car body and wheels shall be backfilled without scattered earthwork; When the vehicle left the gate of the construction site after passing the car wash shop, there was no sludge dripping from the vehicle body.

(2) Set the provisions of the car wash tank. In the entrance and exit of vehicles on the construction site, the equipment of cast-in-place concrete car wash shop should be equipped, and rectangular frames with a width of 3 meters and a length of 5 meters should be adopted, and grooves with a width of 30 cm and a depth of 40 cm should be arranged. Vehicle cleaning equipment should be equipped with drainage pipes and mortar precipitation equipment as required; On-site machines, mechanical equipment and vehicles must be equipped with circulating system tap water equipment for cleaning tap water, and designated full-time personnel management measures.

(3) Vehicle cleaning equipment configuration specification. Should be equipped with _ pressure cleaning high-pressure water gun or safety _ automatic car washing equipment; For municipal engineering and pipeline engineering projects that do not have car wash shop equipment, construction enterprises should choose portable water washing machinery and equipment to clean on-site vehicles, and assign cleaning service personnel after the project supervision agency is willing to do so.

(4) Provisions on loading construction waste. The transport vehicles of residual soil and powdery raw materials leaving the construction site shall be installed in a flat, and shall not be higher than the trunk guardrail, with a coverage rate of 100%. Dump trucks or building decoration materials (sand, lime powder or residual mud) are used to transport vehicles at the construction site. It is forbidden to cover the carriage with white canvas or safety net. All the fully automatic compartments on both sides are sealed to avoid the flying, scattering and leakage of building decoration materials, project wastes and residual soil.

(5) Install the drawing monitoring system in all directions.

1. When the housing project starts, a drawing monitoring system must be installed at the entrance and exit of the new project on site to ensure that the cleaning status of vehicles and the license plate number of transport vehicles are clearly supervised; During the earthwork backfilling operation of new projects, a map monitoring system should be installed near the earthwork backfilling operation area, and the monitoring video should be kept on site for at least 30 days.

2. Within the urban built-up area, the newly-built project of land resources foundation pit excavation and leveling with a total construction area of 50,000 square meters must be equipped with dust video monitoring system machinery and equipment, which can be connected with the video monitoring system management center of the local supervision unit in a standard way to monitor the dust management mode of the system construction site and the cleaning status of vehicles on site in real time.

Six, long-term bare soil 100% coverage or beautification.

(a) the land resources exposed to the construction site for more than 3 months should be landscaped; Land resources exposed for less than 3 months should be covered, compacted and sprinkled with water to suppress dust.

(2) Residual soil and piles that must be accumulated for more than 3 months should be covered with sunshade nets, watered, moisturized and replenished to cultivate natural plant communities; Or planting woody plants with low cost, strong adhesion and rapid growth and development, and implementing temporary beautification. If it is impossible to implement spatial layout greening according to the overall planning in a short time, temporary greening can be implemented by green ecological spraying. The greening rate of the exposed land resource community on the construction site is not less than 95%.

(3) The edge of the mound should be built with diamonds in various ways to solve the problem. The mound should be covered with sunshade net in all directions and watered frequently to avoid dust. To plant lawn seeds and potted flowers, plant seeds should be closely combined with the surface soil layer, then sprayed with water to moisturize and replenish water, and maintained frequently until all green plants grow and develop normally. The stacking area of the construction site should be equipped with simple sprinkler irrigation equipment, and the water should be moderately sprinkled to moisturize and replenish water.

VII. Responsibilities of capital construction, construction and engineering supervision companies in implementing the "six 100%" regulations.

(1) Job responsibilities of the construction unit

1. Fully responsible for the prevention and control of construction dust pollution. Reasonably include the cost of dust pollution prevention and control of construction projects in the project budget, establish the obligation of dust pollution prevention and control of construction units in the construction contract agreement, and urge the construction units to prepare key plans for dust pollution prevention and control of construction projects.

2. It is reasonable to apply for emergency disposal procedures for centralized treatment of residual soil in the project.

3. The land that has not been used for more than 3 months should be landscaped, paved or covered with bare sand; Idle for less than 3 months, it should be covered with pollution prevention.

(2) Job responsibilities of the construction unit

1. In the practical work of dust pollution prevention and control in engineering construction, various dust prevention and control measures in the construction site have been implemented, and rules and regulations for dust pollution prevention and control inspection have been established.

2. The construction unit shall formulate practical implementation opinions and application plans for the prevention and control of construction dust pollution; Publicize information such as dust pollution prevention measures, telephone numbers of responsible persons and dust supervision institutions at the construction site.

3. We should sign an emergency disposal agreement with relatively qualified transportation enterprises and construction emergency disposal sites, and immediately remove loose raw materials such as earthwork backfilling of garbage engineering construction, residual soil of engineering projects and urban garbage.

4. For the project with general contracting management mode, the general construction unit shall take overall responsibility for the dust pollution prevention and control work of subcontractors, and sign relevant management mode agreements with subcontractors to urge subcontractors to implement dust pollution prevention and control countermeasures.

(three) the responsibilities of the construction unit

1. Incorporate the prevention and control of construction dust pollution into the scope of project supervision, clearly put forward targeted project supervision countermeasures in supervision planning, promote the inspection of dust pollution prevention and control of construction units, and urge construction units to implement dust prevention and control countermeasures.

2. In the whole process of project supervision, it is found that the construction unit fails to implement the personal behavior of dust pollution prevention and control countermeasures, and the construction unit should be required to make rectification. If the circumstances are bad, the construction unit shall be required to temporarily terminate the construction and report to the construction unit immediately. If the construction unit refuses to rectify or terminate the construction, the construction unit shall report to the competent department of relevant fields in the city where the project is located.

Eight, the housing construction units and management agencies management and control obligations.

(a) the housing and urban-rural construction departments, the (quality) safety management agencies should incorporate the prevention and control of dust pollution in engineering construction into the daily control category. In accordance with the "who issues the certificate, who bears it" and territorial standards, we will create detailed management measures for project construction and establish management obligation enterprises and responsible persons.

(2) Strict control and lean management.

1. Strengthen the control of new project construction. New projects with imperfect countermeasures and untimely management methods may not start construction; Improve the supervision of construction projects that start capital construction without construction approval and report to urban management units.

2. Implement detailed management methods. Create new construction project details and focus on controlling new project details, establish prevention obligation enterprises and responsible persons, supervision institutions and responsible persons, improve corresponding measures, implement ledger, and immediately upgrade and refine management measures.

3. Handle cases according to law and supervise the implementation of corresponding measures. During the normal supervision and inspection of civilized construction, all supervision institutions should urge the obligatory company to strictly follow the relevant documents of dust prevention measures. Construction sites such as earthwork backfilling, municipal road engineering, traffic and travel municipal road engineering, and gas filling stations will be included in the key control list for key supervision and inspection. For the construction site where the dust environmental pollution found is not implemented in time, it is necessary to establish a ledger, urge the rectification, and report it in time. Personal credit punishment and administrative license should be adopted to urge the construction site to implement the "six 100%" management method.

4. Increase the exposure range. All housing and construction departments should urge construction units to establish rules and regulations for complaints and information disclosure of construction dust environmental pollution, improve rules and regulations for key supervision and tracking, and immediately release voluntary enterprises with inadequate dust environmental protection, small black spots rectification and follow-up solutions to the public according to mainstream media or unit websites.

(3) The relevant industry associations of government agencies should include the prevention and control of dust pollution in the evaluation of civilized, safe and green construction demonstration projects.

Legal basis:

People's Republic of China (PRC) Air Pollution Prevention and Control Law

Article 2 The prevention and control of air pollution should aim at improving the quality of the atmospheric environment, adhere to source control, give priority to planning, change the mode of economic development, optimize the industrial structure and layout, and adjust the energy structure.

To prevent and control air pollution, it is necessary to strengthen the comprehensive prevention and control of air pollution such as coal burning, industry, motor vehicles and ships, dust and agriculture, carry out joint prevention and control of regional air pollution, and implement coordinated control of atmospheric pollutants such as particulate matter, sulfur dioxide, nitrogen oxides, volatile organic compounds and ammonia and greenhouse gases.

Article 3 The people's governments at or above the county level shall incorporate the prevention and control of air pollution into the national economic and social development plan and increase financial investment in the prevention and control of air pollution.

Local people's governments at various levels shall be responsible for the atmospheric environmental quality in their respective administrative areas, formulate plans and take measures to control or gradually reduce the emission of atmospheric pollutants, so that the atmospheric environmental quality can meet the prescribed standards and gradually improve.

Article 4 The competent department of ecological environment of the State Council, together with the relevant departments of the State Council, shall, in accordance with the provisions of the State Council, assess the completion of the objectives of improving atmospheric environmental quality and the key tasks of air pollution prevention and control in provinces, autonomous regions and municipalities directly under the Central Government. The people's governments of provinces, autonomous regions and municipalities directly under the Central Government shall formulate assessment methods to assess the completion of local atmospheric environmental quality improvement targets and key tasks of air pollution prevention and control within their respective administrative areas. The evaluation results should be made public.

Article 5 The competent department of ecological environment of the people's government at or above the county level shall exercise unified supervision and management over the prevention and control of air pollution.

Other relevant departments of the people's governments at or above the county level shall supervise and manage the prevention and control of air pollution within their respective functions and duties.

Article 6 The State encourages and supports scientific and technological research on the prevention and control of air pollution, analyzes the sources and changing trends of air pollution, popularizes advanced and applicable technologies and equipment for the prevention and control of air pollution, promotes the transformation of scientific and technological achievements, and gives full play to the supporting role of science and technology in the prevention and control of air pollution.

Article 7 Enterprises, institutions and other producers and operators shall take effective measures to prevent and reduce air pollution, and shall be liable for the damage caused according to law.

Citizens should enhance their awareness of atmospheric environmental protection, adopt a low-carbon and frugal lifestyle, and consciously fulfill their obligations of atmospheric environmental protection.