Urban three-dimensional greening is an important part of urban greening. On the premise of basically not occupying land, it can play various functions such as greening space of maple huan, reducing dust and noise pollution, improving air quality, relieving heat island effect and reducing building energy consumption.
With the development of urban construction, three-dimensional greening has gradually become an effective measure to increase the amount of urban green and improve the urban ecological environment. All major cities in China have started to develop three-dimensional greening from a horizontal perspective, and introduced a variety of policies to support the further development of three-dimensional greening.
Zhejiang provincial department of housing and urban-rural development recently issued guidelines on urban three-dimensional greening, suggesting that new buildings should carry out roof greening and existing buildings should carry out roof greening, and that the construction requirements of three-dimensional greening should be incorporated into land transfer conditions, planning conditions and construction conditions.
According to the requirements, the new public building (government organs, schools, hospitals, cultural sports venues, etc.) suitable conditions of the roof should be implemented greening, the implementation area should not be less than 60% of the roof greening area. In other new buildings, the number of middle layer is less than 12 (including 12 floors), the height is less than 40 meters (including 40 meters), the property right is clear, and the roof slope is less than 15 degrees, the roof greening should be implemented. The provincial housing and urban-rural development department, together with relevant departments, will incorporate the construction requirements of three-dimensional greening into the land transfer conditions, planning conditions and construction conditions, and encourage the implementation of projects such as the renovation of existing buildings to carry out roof greening for buildings with the completion age of less than 20 years and in line with the building safety requirements.
New urban Bridges and other facilities will be supporting three-dimensional greening
In the wall, vertical greening, guidance in addition to the confidentiality, security and other special requirements of the unit, urban main road, the city street entities such as walls, city parks, scenic spots, tourist attractions, and other important nodes of public building, wall, appropriate planting parthenocissus tricuspidata, dedicated, wisteria climbing plants such as the implementation of vertical greening. New permeable railing and other appropriate synchronous implementation of three-dimensional greening. On the premise of ensuring safety, three-dimensional greening of walls and balconies of public buildings and residential buildings is encouraged. The modular wall vertical greening system can be extended as appropriate to expand the green as far as possible.
In the aspect of three-dimensional greening of municipal facilities, it is advisable to include three-dimensional greening in supporting greening projects for newly built or rebuilt municipal Bridges and other municipal infrastructure, and design, construction and acceptance of three-dimensional greening should be synchronized with the main project. The completed Bridges and other municipal projects should be carried out gradually on the premise of conforming to the standards and meeting the safety requirements. In urban expressway, it is advisable to implement the greening of wall, bridge column, fence and mouth (viaduct and footbridge) for the retaining wall, outer bridge column, sound barrier, urban road fence and other municipal facilities.
All localities should actively carry out urban three-dimensional greening construction, build a number of high-quality demonstration projects, and form a model of three-dimensional greening construction management. The provincial housing and urban-rural development department organized and carried out the evaluation of provincial urban three-dimensional greening demonstration projects, and included the urban three-dimensional greening demonstration projects as additional points in the "guidelines for credit evaluation of construction market subjects in shandong province", as the reference basis for the credit evaluation and bidding of professional enterprises related to landscape architecture in the province. All localities should actively carry out technical training and scientific research on urban roof greening and vertical greening, and promote new technologies, new materials and new varieties. To actively cultivate the roof greening, vertical greening professional backbone enterprises, promote industrial development.
In terms of incentive policies, the guidance requires that in the evaluation and dynamic management of provincial garden city (county), the three-dimensional greening work should be regarded as an important evaluation index and awarded additional points according to the situation, and at the same time, it should be regarded as an important basis for the selection of garden unit (community). If the roof greening and vertical greening are implemented in the new civil building, the ancillary greening area shall be converted into according to relevant regulations. New and rebuilt buildings with better three-dimensional greening will be awarded extra points in the selection of one or two star green buildings. We will encourage local governments to introduce incentive policies to subsidize rooftop greening construction funds with awards, and allocate special funds from urban construction funds for three-dimensional greening construction and management.
According to the measures, urban public facilities such as urban gateways and important traffic nodes, viaducts, pedestrian overpasses, three-dimensional traffic and sanitation facilities should be mandatory.
According to the interpretation of the measures by hangzhou municipal administration of urban management and comprehensive law enforcement, the measures regulate the greening index, and the actual greening area of new public buildings (structures) should not be less than 60% of the greening area of the roof or the overhead layer. The actual greening area should not be less than 20% of the greening area of the external facade of the carrier.
In addition, the municipal and district greening administrative departments shall incorporate three-dimensional greening task indicators into the evaluation and assessment system, regularly organize special assessment, and carry out assessment and acceptance of the completion of indicators of municipal units and districts according to the requirements of indicators.
New project roof greening overlaying soil, 3 meters above the 9 percent deduction
The measures specify specific conversion standards. First, the upper limit of conversion standards is stipulated: the proportion of three-dimensional green area of new construction projects converted into the total area of supporting green land shall not exceed 50% for commercial services and 20% for other categories.
At the same time, "method" stipulated the conversion standard of roof greening and overhead layer greening, covering soil thickness in 3 meters and above, according to 90% conversion of supporting green land area; If the thickness of overburden is 1.5 meters or less than 3 meters, the supporting green land area shall be converted to 80%; If the overburden thickness is 1 meter or more than 1.5 meters, the supporting green land area shall be converted to 60%; If the thickness of overburden is 0.5 meters or less than 1 meter, the supporting green land area shall be converted to 50%. If the thickness of overburden is 0.3 meters or less than 0.5 meters, the area of supporting green land shall be converted to 30%. If the thickness of overburden is 0.1m or less than 0.3m, the area of supporting green land shall be converted to 10%.
To encourage the social from all walks of life to jointly promote the stereo virescence, "method", points out that the social organization, enterprise, individual investment of the construction of the new building, material, municipal facilities stereo virescence in supporting green land area and green area, and the reconstruction of stereo virescence, content of municipal facilities, funds allowance should be given reward.