All
Construction
Vehicles
Construction vehicles
The construction waste generated per 10,000 square meters of construction in construction projects is as high as 500t to 600t. The statistical results of China Construction Waste Resource Industrial Technology Innovation Strategic Alliance show that in recent years, the total annual construction waste generated in my country is about 1.55 billion tons. ~2.4 billion tons, accounting for about 40% of the total urban waste. It is conservatively estimated that in the next 10 years, the average annual output of construction waste in my country will exceed 1.5 billion tons.
The phenomenon of "siege" of construction waste has become more and more serious, and it has gradually become the pain of urban progress. The resource utilization of construction waste is imperative, and a scientific and reasonable site selection of construction waste treatment plants is the basis of construction waste recycling.
1. Current status of site selection for construction waste treatment plants
Issues related to address selection of construction waste treatment plant:
(1) The selected plant site cannot continue to be constructed due to high land prices or protests from surrounding residents;
(2) Unscientific and suitable plant sites have caused a sharp increase in the transportation costs of construction waste, and there has been a phenomenon that construction waste is arbitrarily stacked and the treatment plant cannot handle construction waste.
(3) The construction waste treatment plant is far away from the place where the recycled products are consumed or the building materials market, transportation costs, product sales and other issues prevent the recycled construction waste from returning to construction activities for recycling.
(4) Improper selection of the plant site poses a huge safety threat to the lives and property of surrounding people.
It is not uncommon for construction waste treatment plants in my country to cause various problems due to unreasonable site selection. The more serious one is the 12·20 Shenzhen landslide, which not only caused a large number of casualties, but also brought huge economic losses, and also caused Has an immeasurable social impact. This bloody lesson needs to be taken as a warning, and attention should be paid to the site selection of construction waste treatment plants.
2. Factors affecting the site selection of construction waste treatment plants
To reduce or avoid conflicts between neighbors and avoidance, the site selection of construction waste treatment plants must fully consider various factors, which are mainly divided into the following five categories: social factors, economic factors, environmental factors, municipal factors, and legal factors.
2.1 Social factors
It mainly contains the following contents:
1) Noise pollution.
2) The residents' awareness of risks.
People have different risk perceptions of various types of facilities. The higher the risk perception of a certain facility, the more people reject the facility.
3) Asymmetry of information.
Since the construction waste treatment plant is a neighbouring facility, the government does not disclose relevant information to the public during its site selection process, and the public usually does not know the specific location until the site has been selected.
Therefore, the following reality has emerged: Even though many construction waste treatment plants have obtained the review and approval of relevant departments and have gone through various related procedures, due to insufficient considerations, they have neglected the adverse effects of the treatment plants on the surrounding environment. When the plant was built and put into operation, its adverse effects seriously affected the lives or work of the nearby people, causing a large number of people to protest and complain from time to time, and more negative impacts followed.
Then, the above points can be considered as “population density”. If the site is selected in a place with a small population density, the number of residents affected by the construction waste treatment plant will be small, and the rejection rate of its site selection Naturally, it will be lowered, which will facilitate the development of government site selection.
2.2 Economic factors
1) Factory construction costs.
One is the land acquisition cost for the construction of the treatment plant. The second is the scale of the plant, which directly affects the cost of building the plant. However, if you blindly pursue cost reduction and choose a smaller-scale solution, its processing capacity may not meet the needs of the site. Therefore, it is necessary to choose a reasonable scale. .
2) Transportation costs.
One is the cost of transporting construction waste from various construction sites to the waste treatment plant. The second is the transportation distance from the processing plant to the building materials market. The distance often directly affects the sales of recycled products. The quality of road conditions will also have a certain impact on transportation costs.
3) Fixed expenses.
That is, the cost of purchasing construction waste treatment equipment and related equipment.
4) Operating expenses.
That is, expenses such as employee salaries, management operations, equipment operation processing and routine maintenance.
5) Compensation costs.
The government should provide appropriate compensation for the adverse effects caused by the construction or operation of the treatment plant to surrounding residents, but it is easy to ignore in general.
2.3 Environmental factors
1) Climatic conditions.
The construction waste treatment plant needs to be located in the downwind direction of the prevailing summer wind in the area, and it is also required to be far away from the nearby residential areas more than 500 meters in a straight line.
2) Water protection.
The construction and operation of construction waste treatment plants will inevitably produce a large amount of harmful waste water and waste liquid, which should be kept away from water sources.
3) Terrain slope.
Construction waste treatment plants need to pile up a large amount of construction waste, so they usually occupy a large area, and the flat terrain is good for stacking and transportation operations. The higher terrain is not easy to cause rainwater accumulation and is good for drainage.
4) Geological conditions.
The construction waste treatment plant needs to pile up a large amount of construction waste, and its density and gravity are much higher than that of all kinds of muck. Therefore, the foundation bearing capacity is very high. It is necessary to avoid silt, soft soil, sandy soil, etc. to ensure safety Durability.
2.4 Municipal factors
The construction waste treatment plant has a relatively large investment, and relatively complete municipal facilities will greatly reduce the construction cost of the treatment plant. Including: power supply conditions; convenient information and communication; water supply and drainage facilities; land use planning; traffic conditions.
2.5 Legal factors
The site selection of construction waste treatment plants needs to comply with relevant national laws and regulations and construction waste management regulations. The "Regulations on the Management of Urban Construction Waste and Engineering Dregs" stipulate that the construction of various construction waste treatment facilities must meet the requirements of urban planning and city appearance. Environmental sanitation, environmental protection and other relevant regulations;
The "Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by Solid Wastes" stipulates that the construction of a comprehensive utilization and treatment of construction waste must undergo an environmental impact assessment and comply with the relevant national regulations on the environmental protection management of construction projects;
The "Regulations on the Management of Urban Construction Waste" stipulates that the construction of construction waste-related treatment facilities should be assigned to the urban appearance and environmental sanitation professional for planning.
Since the construction waste treatment plant is a neighbouring facility, once the address selection is not suitable, various problems are prone to appear. The site selection of construction waste treatment plants requires comprehensive consideration of many factors.
