Sanhaizi Country Park

The construction of sanhaizi country park is an important measure taken by Beijing Municipal Party committee and government to promote the development of regional economy and realize the overall planning of urban and rural areas. As the first major ecological project of Beijing's "south city action" plan, sanhaizi country park in Daxing District, covering an area of 11800 mu, is one of the four major country parks in Beijing. The park will take ecological construction as the breakthrough point, royal culture as the foundation, and natural leisure as the concept to form a characteristic country park integrating "wild, interesting, harmonious, rhyme and inheritance".

Sanhaizi Country Park

Daxing sanhaizi country park, the largest country park in the south of Beijing, officially started construction. In three years, the south of the city reappeared rippling green waves, green shade and luxuriant grass, echoing the Olympic Forest Park in the North Fifth Ring Road, becoming another pearl running through the "dragon vein" of Beijing. After the completion of the park, it will play a positive role in promoting the comprehensive development of ecological, social and economic benefits of Nancheng and its surrounding areas, and lay a firm ecological foundation for Beijing to build a world city.

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Jingnan development

"Ecology benefits the people" -- help urban and rural construction, drive the development of southern Beijing

The construction of sanhaizi country park is an important measure taken by Beijing Municipal Party committee and government to promote the development of regional economy and realize the overall planning of urban and rural areas. As the first major ecological project of Beijing's "south city action" plan, sanhaizi country park in Daxing District, covering an area of 11800 mu, is one of the four major country parks in Beijing. The park will take ecological construction as the breakthrough point, royal culture as the foundation, and natural leisure as the concept to form a characteristic country park integrating "wild, interesting, harmonious, rhyme and inheritance".

After the completion of sanhaizi country park, it will play an important role in improving the ecological environment, carrying forward the history and culture, building the city image and promoting the economic development; it will become a large-scale, characteristic, rich connotation, landscape, multi-functional and sustainable country park in the south of Beijing; through the planning and construction of the park, it will realize the strategic concept of the overall urban planning and promote the regional economy, society and culture The comprehensive development of urbanization.

The construction of the park follows the principle of "giving priority to protection, actively managing, strengthening the protection and restoration of natural ecosystem, and maintaining regional ecological function". It takes advantage of the original resources of royal garden, elk reserve, natural wetland in sanhaizi area, fully explores its cultural connotation, and focuses on the construction of wetland landscape, royal culture, elk protection, ecological leisure, and farming experience The five functional areas will build a platform for carrying the traditional culture and modern urban civilization of the area, making it echo the northern Olympic culture and the history and culture of the central city, and enriching the cultural connotation of the capital Beijing.

Daxing District of Beijing will also speed up the construction of sanhaizi country park, continuously improve the construction of surrounding public service facilities and infrastructure, create a better living environment for the surrounding urban residents, and accelerate the construction of urban-rural integration. Continuously optimize the ecological environment of Nancheng and the southern region, enhance the competitiveness of regional development, create good conditions for the major layout and adjustment of industrial structure, create conditions for Daxing new town and Yizhuang new town to undertake the industrial transfer and industrial upgrading of the main urban area, realize mutual promotion and integration, and drive the development of high-end industries.

project

"Removing mountains and diverting water" -- restoring ten thousand mu of wetland, crushing garbage

"The best is like water, which benefits all things without dispute." After the construction of sanhaizi country park, the largest wetland in southern Beijing will be restored. It will build a "big kidney" for the water shortage and drought in Beijing. Sanhaizi country park will take Milu garden as the core, and carry out wetland restoration around it. In the next three years, with Milu garden as the center, in sanhaizi area, where Yizhuang, Jiugong and Yinghai towns intersect, 12000 Mu wetland will be constructed and restored, of which water surface accounts for one fifth. The reclaimed water of Xiaohongmen sewage treatment plant after strict filtration treatment will make it reappear the rippling landscape.

There are also a large number of landfills in the area. After a large amount of garbage is dug out from the pit, the treated reclaimed water will be introduced, and then various aquatic animals such as fish will be raised in the water body, and emergent, floating and submerged aquatic plants such as cattail, reed and lotus will be planted in different waters to attract wild animals to inhabit here, forming a complete ecosystem.

The overall ecological planning, green industry system development strategy and overall integration planning of sanhaizi country park, jointly designed by Beijing urban planning and Design Institute, Beilin landscape planning and Design Institute and School of architecture of Tsinghua University, highlight the characteristics of improving ecological conservation, ecological regulation and ecological service function optimization of sanhaizi country park, and strengthen the ecological protection of natural ecosystem The characteristics of ecological restoration and restoration, ecological economy and ecological protection, and efficient utilization of ecological local resources are analyzed from the perspectives of sanhaizi wetland restoration, garbage harmless and resource-based treatment, flood discharge and detention, and ecological near natural countryside landscape restoration.

After sanhaizi wetland is restored, it is like a natural filter. When water containing poisons and impurities, such as domestic sewage and industrial emissions, passes through the wetland, the poisons and impurities will be precipitated and removed, so as to ensure the safety of downstream water.

At the same time, a large area of water in sanhaizi wetland is evaporated into steam, and then it will drop to the surrounding areas in the form of precipitation, increasing the humidity and rainfall in the nearby areas, which is of great significance for Beijing, which is short of water, and Daxing, which is developed in agriculture.

Daxing is located in the South Beijing plain. However, the flourishing without mountains will soon become history. In the construction of sanhaizi country park, Daxing will make use of crushed construction waste to "build mountains" and turn the former place name "Santai mountain" into a real scene.

The previously dry ponds in sanhaizi area have been filled with garbage, and the total amount of landfill has reached 22 million cubic meters, which has polluted the soil and groundwater quality, and affected the local atmosphere and water environment. The construction of wetland landscape will also dig out a lot of earth and stone. How to use these construction wastes without causing secondary pollution? The planner decided to use the construction waste to "build a mountain".

Construction waste will be broken and sorted according to various specifications. According to different specifications, they are used separately. As filling materials, the broken garbage can be divided into three grades: Grade I, which is more than 20 cm in diameter, is used for mountain filling materials; grade II, which is 10 cm to 20 cm in diameter, is used for park subgrade construction; grade III, which is less than 10 cm in diameter, is used for park road filling materials, Greenland Yong Road, sidewalk stones, etc.

Domestic waste will also be used. Due to the long-term landfill, a lot of domestic waste, grass and leaf residues have already become humus. This project will excavate these wastes and mix them with the soil to increase soil fertility and facilitate the growth of plants.

According to the plan, three scientific and technological "hollow mountains" with heights of 30 meters, 20 meters and 8 meters will stand in sanhaizi area before May Day. A total of 14000 structural frames will be arranged in this project, and more than 3000 have been completed.

The reason why these three mountains are "hollow mountains" of science and technology is not only that they "turn construction waste into magic", but also that in the built mountains, the huge internal space will become Exhibition Center, park and other facilities, as well as sightseeing elevator.

According to Sun Kang, the chief engineer of the project, there will be 80000 square meters of space inside the three "hollow mountains". "After the completion of sanhaizi country park, these mountains will assume the functions of exhibition center, park supporting facilities and other development and utilization." In order to facilitate the public to play, elevators and other facilities will also be loaded inside the mountain, "hollow mountain" has all five internal organs, "and a more detailed utilization plan is still being formulated."

In addition to all the facilities inside, the three "hollow mountains" of science and technology also use a lot of environmental protection technologies for heating and cooling. According to reports, the mountain will make full use of shallow geothermal, through the installation of energy collection compression pump and other devices in the underground, the scattered underground heat will be collected, and directly provided to the "hollow mountain" through the pipeline. "In winter, use this to maintain the internal temperature, provide hot water, and no other heating methods are needed." Sun Kang said. In summer, the energy collection compression pump will also collect the cold air from the nearby lakes and send it to the mountains for refrigeration. "After calculation, the energy collected in each season is completely enough."

Cultural connotation

"Three palaces and five seas" -- reappearing the Royal Garden and enriching the cultural connotation

Sanhaizi area in the Qing Dynasty Shunzhi to Qianlong years built a number of palaces, temples, royal gardens, water supply, lakes and marshes such as mirror, vibrant. The water system of rivers and lakes in the South China Sea is divided into the north and the south, which is the product of the change of Yongding River.

Originally, there were 25 lakes in Nanhaizi. In the Ming Dynasty, there was a royal garden, which was the "autumn wind in the South" of the "ten sceneries of Yanjing". However, after several generations of changes, the wetland in Nanyuan area has become paddy field and cultivated land, and then abandoned. There used to be the saying of "three palaces and five seas". The "five seas" refers to the five larger lakes in Nanyuan area, with rippling green waves and abundant water and grass. It is estimated that these five lakes in Nanyuan, together with several other lakes, have a total water area of 2573.45 mu. By the 1980s, the upper reaches of the Yongding River had been cut off, and lakes and waterways were gradually dried up. Once, the Jingnan water system had only become a legend and memory.

The construction of sanhaizi country park will revive the "five seas" and recreate the water system in southern Beijing

Chinese PinYin : San Hai Zi Jiao Ye Gong Yuan