1. The concept of green community

When mankind has entered the threshold of 2 1 century, the concept of green, environmental protection and sustainable development has long been deeply rooted in people's hearts and has become a popular theme in this century. Harmony with nature has become people's concern and expectation. In such an era of calling for environmental protection, green community refers to a living community that conforms to the principle of sustainable development, is based on green building materials and green technology, and has a beautiful environment, advanced facilities and complete facilities. Green is a sign of being harmless to the environment. As the basic element of eco-city, green community has rich contents, including energy saving, land saving, water saving and resource reuse. It embodies a brand-new awareness of architectural culture and a strong sense of responsibility for improving the ecological environment and quality of life. It embodies the concept of sustainable development and is an ideal living environment for human beings to live in harmony with nature by means of science and technology in the 2 1 century.

2. Principles of building a green community

Green community belongs to sustainable development community and is a part of the whole earth ecosystem, and its planning and construction should follow certain principles.

(1) site selection principle

First of all, residential areas should be located in a healthy environment. Residential areas should be far away from industrial areas that produce sewage, garbage and noise. The less, the better. Houses should be built in the center of a big city suitable for business. It is advisable to build more houses in wasteland, sloping land and hilly areas, occupy less or no cultivated land, give full play to the role of underground space, and appropriately encourage high-rise and medium-high-rise buildings. Secondly, in order to ensure the cleanliness of the residential area, we should consult the relevant land use management files to understand the geological characteristics of its foundation, so as to verify whether the selected land has original pollution and whether it is a high radiation area of radioactive elements. For example, in the north of China, a residential area was built on land seriously polluted by chemical plants. When the chemical plant moved out, the ground and foundation were not completely cleaned up, which led to a high incidence of cancer among the residents who moved in. Finally, the location of residential areas should also conform to the national land planning, regional planning, urban master planning and so on. And pay attention to the convenience of traffic inside and outside the community.

(2) Respect for natural principles

The purpose of building a green community is to live in harmony with nature. Therefore, in the process of building a community, we should establish a correct relationship between man and nature, respect and protect nature, and minimize changes to the original natural environment. Therefore, we should be familiar with the vegetation, tree species, water system and rocks in the construction site, strictly protect the local natural and cultural heritage, protect the original landscape features and local characteristics of the construction site, maintain biodiversity and protect a benign ecological cycle.

(3) Advocating the 4R principle

The construction of green residential area should fully embody land saving, energy saving and water saving, so the 4R principle should be advocated in residential area construction, that is, reducing use, recycling, reuse and recycling. In other words, after the residential area is completed, it is necessary to reduce non-renewable resources such as water, coal and electricity as much as possible and make efficient use of them, and make full use of renewable energy such as solar energy, wind energy, hydropower, geothermal energy, bioenergy and biogas.

(4) planning and design principles according to local conditions

Because the design of green residential area is a complex systematic project, it is necessary to fully understand the local climate, hydrology, topography, landforms and vegetation, pay attention to economic, cultural, historical and customs conditions, and design a scientific and reasonable scheme in combination with local building materials and construction technology.

(5) the principle of reducing environmental pollution in residential areas

The main body of the house should use green building materials to ensure the indoor environment is clean and harmless. The noise of the community is controlled at ≤45dB during the day and ≤40dB at night. Outdoor noise should be controlled at ≤50dB during the day and ≤45dB at night. Environmental protection pipes should be used for water supply in residential areas to avoid water pollution caused by secondary water supply system.

(6) the principle of "turning harm into benefit and turning waste into treasure"

The construction of green residential areas should pay attention to the treatment and recycling of wastewater and solid waste. For example, a rainwater collection system and a reclaimed water reuse system are established. Rainwater can be collected and used in the reclaimed water system after being treated to meet the standard, and reclaimed water can be used for watering green spaces, washing cars and flushing toilets. , thus forming a multi-level utilization and recycling of water resources. For another example, it is necessary to build a garbage sorting and collection system in the community, and pay attention to the recycling and reuse of garbage in the treatment of community garbage.

In a word, the green community should provide people with a healthy, comfortable, beautiful, convenient and pleasant living environment.