With the development trend of my country's economy, the continuous expansion of urban planning and construction scope and the improvement of people's daily living standards, the amount of urban garbage will increase.

The key hazards of construction waste involve the following six aspects:

The first is the occupation of land resources. At present, most of my country's urban garbage is not solved and is immediately transported to the suburbs for accumulation. According to the relative height of sedimentation of 3 meters, every 10,000 tons of urban garbage occupies about 2,500 square meters. The suburbs of many large cities are usually the accumulation places of urban garbage. The accumulation of large-scale production, manufacturing and commercial land has further aggravated the population disparity in my country.

Second, environmental pollution The harmful substances contained in the soil layer, urban garbage and water treatment process water will pollute the soil layer. It includes changing the physical structure and physical properties of the soil layer, endangering the adsorption and growth of plant nutrients, endangering the vitality of Vibrio cholerae in the soil environment, and destroying the diversity of organisms in the soil layer. Harmful substances accumulate in the soil environment, resulting in excessive harmful substances in the soil, hindering plant growth, and even causing the death of plants. Harmful substances will also migrate into the fruit body according to the digestion and absorption of plants, endangering health and livestock. In addition, bacteria on the urban garbage belt will continue to spread diseases and cause biological invasion of the natural environment.

3. Environmental pollution of water quality. After the urban garbage is soaked in the yard, the waste cement mortar and concrete pad contain a large amount of hydrated calcium sulfate and sodium carbonate, the waste gypsum contains a large amount of sulfate, and the waste metal raw materials contain a large amount of heavy metal ions. The anaerobic fermentation and dissolution of waste cardboard and waste wood itself leads to wood cellulose and tannin, which dissolves organic matter. The biological fluidized bed water caused by urban garbage in the dump is generally a strong alkali, containing a large amount of heavy metal ions, hydrogen chloride and a certain amount of organic compounds. After water pollution, it will endanger and damage the life of aquatic organisms and the use of water sources at the same time.

4. Air pollution. The key to gas environmental pollution comes from the conversion of many sulfates in waste gypsum into hydrogen sulfide gas under anaerobic fermentation standards. Under anaerobic fermentation standards, waste cardboard, wood cellulose and tannin dissolve to produce volatile organic matter.

5. The public environmental sanitation and natural environment deteriorates.

6. Some construction waste stations are opened immediately to a large extent, and there are many safety risks around the construction site, which becomes a temporary accumulation place for urban garbage. Due to the consideration of the convenience of construction and the lack of due safeguards, under the direct influence of external factors, urban garbage often collapses, blocks roads, and even rushes to other construction sites.