What is the function of wall greening?

With the progress of greening technology and the increasingly strong requirements of eco-city, there are more and more forms of wall greening, and the methods are more and more advanced and diverse. This is because wall greening is of great significance to the city: beautifying the environment and returning to nature; Energy saving and environmental protection, making the building warm in winter and cool in summer; Create a healthy and natural living environment; Improve the urban heat island effect and reduce the urban drainage load; Vacuum, reduce noise and so on. The measured results of wall greening and building energy saving show that when the outdoor temperature is 38℃, the maximum temperature of the outer surface (dark gray exterior paint) of non-green buildings can reach 50℃, while the temperature of the outer wall with building greening is 27℃, especially for the wall facing west. According to the measurement, where there are plants, the light intensity is only a few tenths to one percent of the direct sunlight, and the dense branches and leaves are like a thick layer of cashmere. At the same time, the relative humidity of air can be increased by 10-20% after wall covering, which is of great benefit to people to eliminate fatigue in hot summer. The indoor air temperature of buildings with wall greening is about 3~5℃ higher than that of buildings without greening, and the cooling effect is obvious. Wall greening refers to planting plants (mainly herbs and shrubs) on the wall. Usually, the angle between the wall and the horizontal plane is between 75 degrees and 120 degrees. Wall plants can survive for 5-30 years or even longer under the necessary maintenance similar to ground plants. With the advent of the low-carbon era, it is a high-tech that is booming all over the world.

Due to the limited urban land, the cost of urban land greening is relatively high. Therefore, it is necessary to make full use of urban space and afforest the external walls, fences, bridge columns, balconies and window sills of buildings to improve the urban living environment. Composition of greening system of Anyou city wall. Generally, it can be divided into wire drawing type, segmented wire drawing type, oblique insertion type, segmented oblique insertion type, block assembly type and liquid matrix type, and basically consists of structural layer, plant layer, matrix layer, plant bearing container and supply system. Plant selection. Different plants choose in different ways. Climbing plants are commonly used for wire drawing and sectional wire drawing. Block type uses herbs with beautiful color and appearance and strong covering ability. Small shrubs, flowers, ferns and herbs with bright colors and strong covering ability are selected for oblique insertion.