Beijing Jianzhu University realizes many technological breakthroughs in urban rainwater system

Professor Li Junqi, Beijing Jianzhu University

Urban rainwater system and water environment research team development process and landmark achievements

Dr. Li Junqi, Professor, Doctoral Supervisor, Dean of the School of Environmental Engineering, Beijing Jianzhu University, Director of the Key Laboratory of the Ministry of Education, Ministry of Education, Urban Rainwater System and Water Environment, Head of Urban Rainwater System and Water Environment Academic Innovation Team, International Water Association (IWA) registered member, member of the International Rainwater Utilization Association, editorial board member of the "Water Supply and Drainage" magazine, member of the Expert Committee of the Sponge City Construction of the Ministry of Housing and Urban-Rural Development. In recent years, he has presided over more than 40 scientific research projects, published more than 120 academic papers, won 5 provincial and ministerial awards, 6 cooperation monographs (textbooks), 15 invention patents, and 6 national standards. He presided over the design and implementation of more than 50 demonstration projects of rainwater and water environment, and applied a number of technical achievements in the demonstration, with significant economic and social benefits.

With the support of relevant state departments and Beijing, the laboratory research conditions have been greatly improved. The key laboratory has a laboratory area of ​​over 4,000 square meters and 62 fixed personnel, including 55 researchers and 7 technicians. At present, the total number of instruments and equipment is more than 2,400 pieces, with a total value of more than 40 million yuan. During the construction period, the following five experimental platforms will be built: rainfall simulation experimental system platform, water quality monitoring and analysis precision instrument experimental platform, numerical simulation and large-scale computing basic experimental platform, shallow groundwater seepage and pollution control experimental platform, wastewater biological treatment and sludge Reduce the experimental platform. The laboratory will also continue to implement the "open, mobile, joint, and competitive" operating mechanism, based in Beijing, facing the country, based on the current, future-oriented, focusing on the major needs of the country's rainwater and water environment, especially the capital and even the Beijing-Tianjin-Hebei region. Regional development needs, carry out innovative research, enhance innovation capabilities, increase social services, promote discipline development, and support high-quality personnel training with high-level scientific research.

On a global scale, flooding is one of the more prevalent environmental problems. In recent years, heavy rains in China's domestic cities have caused frequent occurrences of rain, flood, and runoff pollution. Among them, urban road water accumulation is one of the main sources of urban flooding and rainwater runoff pollution. At present, most cities in China still adopt the traditional “quick discharge” as the main target of “road impervious water surface—rainway – municipal pipeline – river and lake water system”, which is easy to cause excessive flood discharge pressure. Road surface runoff pollution, loss of rainwater resources and ecological environment damage. In order to meet the requirements of modern urban construction on the ecological environment, in the construction of sponge cities, it is necessary to explore urban road related design techniques suitable for Low Impact Development.

The Key Laboratory of Urban Rainwater System and Water Environment Ministry of Education of Beijing Jianzhu University took the lead in research and practice of urban green rainwater system, low impact development, integrated rain and flood management, and green building water system design. The laboratory focuses on the common problems in the control and comprehensive management of urban water environment pollution in China, taking the urban rainwater system as the entry point, taking the sustainable water cycle as the guide, and establishing a healthy urban water environment as the goal to reveal the urban water environment and water volume. Supported by the scientific mechanism of water quality protection, in urban stormwater control and utilization, water purification and environmental risk assessment, water resources recycling and water conservation, water resources optimization allocation and management, through environmental engineering, municipal engineering and environmental science Cross-disciplinary and infiltration of disciplines, focusing on the interdisciplinary innovative application of basic research.

After nearly 20 years of unremitting efforts and innovation, the laboratory has accumulated a series of theoretical and engineering applications in the research and engineering practice of urban rainwater systems and water environment. During the construction period, the laboratory has undertaken more than 150 projects, and the research service funds exceeded 100 million yuan. It has won the first prize of the Natural Science of the Ministry of Education, the first prize of the China Construction Science and Technology Department of the Ministry of Housing and Urban-Rural Development, and the second prize of the Beijing Science and Technology Progress Award. Research awards 11 items. In 2015, the laboratory was awarded the honorary title of “Capital Environmental Protection Advanced Collective” by the Beijing Municipal Government.

In the research direction of rainwater control utilization, the laboratory edited the first national technical guide for rainwater control and utilization in China--the "Sponge City Construction Technical Guide", and participated in the compilation of several national standards related to urban drainage. Since 2015, the team has assisted Jinan, Baicheng, Jiaxing, Dalian, Ningbo and many other places to successfully declare sponge city construction pilot cities. At present, the team is responsible for the overall consulting services for the construction of sponge cities in pilot cities such as Jinan, Chizhou, Dalian and Xixian New Area. At the same time, it has undertaken more than 100 projects including the design of some sponge city monitoring platforms and the design of engineering projects. The key technologies of urban rainwater control developed by the laboratory have been transformed into technologies and applied in the project. The key technologies of sponge cities developed by the laboratory As the main achievement of the national science and technology major project of “Water Pollution Control and Governance”, it participated in the “Urban Water Pollution Control” section of the National “12th Five-Year” Science and Technology Achievement Exhibition, which has received extensive attention and coverage from major news media.

In terms of urban roads with low impact development, the laboratory has carried out research on water special project “Urban Road and Open Space Low Impact Development Rainwater System and Demonstration Project (2010ZX07320-002)”. The project involves many majors such as water supply and drainage science and engineering, environmental science, environmental engineering, and municipal engineering. Through independent innovation, it has formed a number of innovative intellectual property rights and invention patents. During the research and development process, the project leader Li Junqi led the project team to carry out key technical research, focusing on the water environment problems such as the increased risk of internal disasters, the increasingly serious runoff pollution, and the loss of rainwater resources in the process of urbanization, surrounding urban roads and open spaces. The urban rainwater system based on the low-impact development model was studied, and the complete set of technical measures for low-impact development of urban roads and open spaces was constructed. At the same time, the series of low-impact development standards for rainwater were compiled and revised, the connotation of sponge city was interpreted, the core system of sponge city construction and its connection relationship were established, and the construction of national sponge city was systematically guided. Relying on the project research, 39 academic papers and more than 13 invention patents have been published, and the “Technical Guidelines for Low Impact Development of Urban Roads and Related Facilities” has been completed.

The innovation of the project in the technical field is embodied in the construction of the rainwater tertiary treatment technology system of “source reduction – process percolation retention and emission reduction – end ecological purification and reuse”; Design method of rainwater treatment and utilization facilities; research and development of urban roads, efficient and safe infiltration and emission reduction pavement technology, urban road composite medium bioretention and emission reduction technology, urban road efficient interception and over-flow purification technology, urban green space multi-purpose storage and storage - Retention and emission reduction - water quality assurance technology, cyclone sedimentation technology for rainwater pipelines, automatic percolation and dewatering and permeable permeable pavement integration technology, greenfield planting, maintenance and rapid restoration technology based on rainwater impact and changing water level Such as low-impact development of complete sets of technical measures; proposed the design method and process of low-impact development of urban roads, completed the construction drawing design of urban roads and related facilities low-impact development rainwater system demonstration project.

The innovation of the project in the field of new products, new materials, new equipment development and industrialization is reflected in the development of new artificial molecular sieves and ecological concrete materials, the preparation of ecological concrete based on adsorbent materials and methods for water purification, and the development of runoff rainwater N, P nutrient salt recovery bio-ecological recycling technology and multi-media rainwater percolation to replenish the groundwater system, and constructed a phytosanitary permeable ecological concrete bank-stable stable purification technology system, surface flow biological treatment system and treatment method, its products are in Beijing, Hebei, Jiangsu, Hunan and other regions have been applied and promoted; the combined multi-media percolation purification tree pool developed by the company can not only effectively control the initial rainwater pollution, but also use the internal filter media to further remove the dissolved pollutants in the stormwater runoff, construction, Simple maintenance and management, easy to modularize production, wide application range, more than 160 sets have been applied in the demonstration project of Shenzhen Guangming New District; research and development of temperature-mixed asphalt anti-slip wear layer (OGFC) and regeneration (OGFC) new materials, plastics Grid sand-based permeable brick paving system in Shenzhen bicycle lane project and Henan Provincial provincial road reconstruction projects have been applied to the project; the project has also developed typical low-impact development rainwater control and utilization technologies and products such as sewage interception and reclaimed water permeable pavement, and industrialized, and developed urban rainwater systems for low impact. The promotion and application of urban roads and open space professional fields will support the development of urban roads and green infrastructure, materials industry, chemical industry, landscape gardens and other related industries. Relevant research results won the second prize of 2016 Beijing Science and Technology Progress Award (mainly completed) People: Yuan Donghai, Li Junqi, Che Wu, etc.).

The innovation of the project in the construction of sponge city management standard specification is reflected in the laboratory preparation and revision of the series of low-impact development standards for rainwater, and the core system of sponge city and the core system of sponge city construction and its connection relationship. The research results of laboratory low-impact development rainwater system have been applied to the following national standards: "City Road Design Code" (CJJ37-90), "Park Design Specification" (51192-2016), "Urban Green Space Design Specification" (GB50420-2007) ), "Technical Guidelines for Low Impact Development of Urban Roads and Related Facilities", "Guidelines for Low-impact Development Planning and Design of Urban Open Space", "Technical Guide for Sponge City Construction - Construction of Low Impact Development Rainwater System" (Trial). At the same time, the series of equipment products are listed in the "Spoil City Construction Advanced Applicable Technology and Product Catalogue".

In addition, the project also designed and developed a comprehensive database of urban low-impact development rainwater systems, a river basin rainwater pipe network model, and urban low-impact development rainwater system planning and design tools. Based on the map data, tabular data and image data of the rainwater system in the Maozhou River Basin in Shenzhen, the comprehensive database of the rainwater system of the Maozhou River Basin in Shenzhen can provide data support for the management and model integration of urban low-impact development rainwater systems. Based on GIS technology, the SWMM hydrological analysis model, low-impact development simulation model and low-impact development planning and design procedures are integrated to develop low-impact development rainwater system hydrological analysis tools, which can accurately simulate the operation effects of various low-impact development measures and assist low Influencing the planning, design and optimization of development, simulating the production and convergence of rainwater on the surface of the rainfall process, accumulating pollutants, scouring and changes in hydraulic and water quality in the rainwater pipeline, so as to master the operation law of the urban stormwater system. feature.

In recent years, the laboratory has developed a complete set of technologies through research and development of low-impact pollution reduction and sewerage purification at the source to ensure that the sponge city planning and design program can effectively control urban rainwater risks, control urban floods, and reduce urban river surface source pollution. Great promotion; laboratory prepared and revised a series of low-impact development standards for rainwater, providing scientific basis and support for the planning and design of sponge city, improving the scientific and standardization of sponge city construction; laboratory based on the project development low-impact development The complete set of technical, compiled and revised series of low-impact development standards for rainwater has effectively supported the construction of the national sponge city and won praises from relevant departments, local governments and residents.

Washing supplies

Suzhou Longliqi Imp.&Exp. Co.,Ltd , https://www.longliqiexp.com