As early as in the 1970 of the 20th century, the "Flower City" in Guangzhou Dong Fang hotel, Guangzhou set up China's first large roof garden. But compared to other cities, slow pace of development of roof garden in Guangzhou.
In 2012, the finance and the Housing Ministry jointly issued the Declaration on accelerating the development of green building ① opinions put forward by 2015, new green construction area reached more than 1 billion by 2020 green building as a percentage for new construction will be over 30%. In October 2014, Guangzhou City, Guangzhou Municipal People's Government is in the green building made in the implementation of action II, to develop green building, speeding up energy-saving renovation of existing buildings, actively promoting green roofs, vertical greening.
Ecological energy-saving roof gardens as an important component of green building, can improve the effectiveness of the roof garden in Guangzhou City, improve the ecological environment, promoting livable brand index, create a sustainable development and harmonious society. Therefore, the study on the application of energy-saving technology of urban roof garden of Guangzhou is very necessary. Ecological and energy-efficient technology is to achieve ecological and energy-efficient, environment-friendly space, and created and developed tools, methods and skills combined. Ecological energy-saving roof garden is on the roof to form a conservation and efficient use of natural resources and energy, can be self-sustaining and improve the eco-system, to provide a comfortable, healthy and pollution-free green space, it is mainly reflected in sections, saving water, saving energy and raw materials in four aspects. Eco-energy-saving design based on spring garden office building roof garden, for example, exploring urban ecological and energy-efficient design of roof garden in the practical design concepts and technology applications. Spring Garden rooftop garden project completion has been close to a year, many eco-effect of the use of energy-saving technologies to be validated, has some significance.
1 project overview and landscaping ideas
The project is located in the Headquarters economic zone A5 building, the roof Science City, Guangzhou development zone, North Siam gang mountain overlooking the South overlooking the splendid new Guangzhou Branch of the eight city.
Covered with project sites around the world 500 strong enterprises, more Wanda Plaza and gold sink, commercial complex, is the core area of development zone, convenient transportation and has a strong show and promotional value. The building sits Southwest toward the Northeast, the overall design of load capacity for 3.5KN/m2. Roof is nearly square, with a total area of about 943m2, which covers air conditioning machines of about 170m2, the engine room covers an area of about 148m2, three surface drainage, slope of 2%. The project uses a "three lives" – win-win ecology and life, production design. Ecology: by collecting renewable energy such as solar, wind, rain, provide pollution-free energy for buildings, city water pressure.
While the garden can be thermal insulation, noise reduction, clean water and improve the urban ecological environment, ease the heat island effect, creating a self-sustaining and improve the eco-system to achieve harmony between man and nature, green roofs and geographical environment symbiosis. Life: to create a beautiful environment for enterprise employees to provide more leisure and recreation of natural spaces, through participation in the process of construction and maintenance, to enrich their life experience, ease the work of intense fatigue.
Production: building agriculture, efficient agriculture and increase economic benefits. Meanwhile, through the integration of landscape and leisure products, realized the commercial and leisure balance. "Ecology, life and production" the perfect combination of the Trinity meets eco-section energy-saving roof garden, saving water, saving energy and raw materials demand. A less than 1000 m2 area how to satisfy both leisure, party entertainment, products, culture, agricultural production, energy collection and many other needs, reflect the "three" concept, landscape designer is a great test. Projects adapted to local conditions to set the 7 districts: entrance area, the central area, rest area, lookout area, product display area and air conditioners drop zone (Figure 1). 2 ecological energy saving technology application
Concrete design, the project used eco-plant wall, micro-farms and eco-composting, water conservation and dripping irrigation, waste recycling, energy conservation and green energy use, and other ecological and energy-efficient technologies, following a variety of technical problems to be resolved and functional characteristics, specific practices for details.
2.1 eco-plant wall
Ecological plant can utilize the limited elevation of the wall space, increase the amount of green, optimization-Habitat environment, improvement of the urban heat island effect, dust and noise reduction, improved air quality, and energy consumption, indoor warm in winter and cool in summer. Eco wall there are a variety of practices, roughly divided into towed, trough, modular, bag, PVC pipes, paving, eco bag pattern. According to the characteristic sites of the project were selected a different pattern (Figure 2). Vertical green wall here used to beautify the parapet has 3 modes: traction, plate slot, and bag. Decorating or parapet, and present their products.
Traction type can on climbing real of growth direction for guide, usually auxiliary framework and buildings Zhijian to keep must of spacing, such plant not damaged building wall surface material, and simple, and cost lower, and light breathable sex good; Board slot type replaced plant convenient, applies Yu temporary plant flower set, owners can according to different Festival replaced plant to change composition, addition using automatically watering convenient conservation; bag type due to no fixed shape container of hinder, soil ball not by limited, can for select of plant varieties more, Bag store water and nutrients to the entire wall surface and the root of all, convenient maintenance, low cost.
2) block of vertical green wall air conditioner a PVC pipe is used here as a container for the plant, not only saves materials costs, also reflects the low carbon and environmental protection features. Long tubular container is suitable for growing uninterrupted, composition maps of complete plants, will show at the bottom of the PVC pipe, for a closer look. Stainless steel frame decorated with green ice cracks on the surface of the wall, the modern Chinese taste, the overall effect is simple and beautiful. Selection of vertical green wall plants mainly include herbal of Chlorophytum Chlorophytumcomosum, hanging zhumei Tradescantiazebrina, of Phnom Penh fruit taro Syngoniumpodophyllum, green Epipremnumaureum, Boston fern Nephrolepisexaltata, small clams blue Tradescantiaspathacea' Compacta', variegated shrub cucumber vines Schef fl eraarboricola'Variegata', loropetalum chinense Loropet-alumchinensevar.rubrum yellow leaves, purple-cigar flower Cupheaarticulata, Durantaerecta'GoldenLeaves', Hypericum perforatum, vine type of color-leaf Ivy Hederahelix, Firecracker flower Pyrostegiavenusta, garlic vine Mansoaalliacea, fragrant vine Mandevillasanderi, Wisteria Wisteriasinensis, etc.
2.2 micro farms and eco-composting
Micro-farm construction as the basis, the use of land for crop cultivation in the form of non-traditional cultivation. In addition to thermal insulation, air purification, mitigation of urban heat island effect, and full use of urban space characteristics, but also landscape and practical, is a beautiful and delicious edible landscapes, reflecting the high quality level to pursue life. Project all kinds of vegetables and fruit trees with conventional plant mix Gallery frame, roads, landscaping, water features, Garden space, both economic and environmental and landscape is unique, just like Tao Yuan-ming's ideal state: "the land pingkuang, houses like, Liang Tian Mei Chi Sangzhu is. Criss traffic convenience. "
There are 4 main planting patterns: three-dimensional planting and traditional agricultural land, move a container planting, the climbing Gallery frame plant (Figure 3). Stereo planting styling beautiful, and save space, through drops arrows irrigation intelligent control watering, save water, and installation and demolition also simple; traditional farmland planting form construction simple, and cost low, combined has gardening made Park technique, selection different leaves shaped and leaves color of vegetables varieties, build out has ornamental strong, and full natural wild of garden; mobile container planting flexible changeable, can free assembled into different styling, efficient using various corner space, selection waste of barrels, and basin, and tank, as planting container, reflected environmental concept, Also plays a decorative role climbing Gallery frame to save space, easy to mix with other landscape, where full use of the entrance to the Garden District Gallery frame rest growing climbing plants, landscaping and shade effect.
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