Building And Residential Rainwater "Infiltration-drainage Integration" Technology Performance And Applied Research

With urban development, housing construction and road area increased rapidly, urban non-permeable surface area also increased. The result is the total runoff coefficient increased and stormwater runoff flow surge in cities. If still using the traditional drainage system to exclude rainwater quickly, it will be bound to increase the burden of flood control greatly in the city of water downstream, and caused enormous pressure on urban drainage and river flood, at the same time, this also caused a huge loss of rainwater resources. Therefore, the new ways and techniques of rainwater use and drainage appeared, and gradually turn to the rainwater utilization and ecological drainage system of initiative acceptance-based currently.Rainwater in building and sub-district is the origin of rainwater, using rainwater utilization and ecological drainage system can change waterdrainage to rainwater utilization, in order to reduce runoff coefficient and slow down the pressure on municipal discharge, so that the loss of rainwater utilization, water-saving, and increasing the soil moisture of underground plot, improving the ecological environment.National "Eleventh Five-Year"Technology Development Plan, "Building Business and Technology Policy Framework, " And so so do enough attention to the urban rainwater utilization. National Standard " Engineering technical code for rain utilization in building and sub-district" have been executed in April 1, 2007, technology and equipment has also been applied in practical engineering. However, in the process of specification preparation and operations of practical engineering, leaving behind a more technical and difficult issues; In addition, the study of rainwater direct use is enough at home and abroad , the research of ecological drainage system is less, Does not have a comprehensive evaluation about eco-friendly rainwater drainage system.To this end, this thesis as a new type of eco-friendly drainage system of starting point, first of all to do the basic summarize of rainwater utilization at home and abroad, a brief introduction on various new technologies of indirect rainwater utlizition currently, followed by focusing on the "infiltration - discharge system" to research, including: testing the system drainage performance, and the largest discharge flow; Research the performance of the system rainwater infiltration and summed up the experience of the current study of rainwater infiltration and calculated the maximum osmolality and storage capacity; According to the catchment area and storm intensity formula in Beijing area, checking the system maximum load and maximum design rainfall return period under different initial conditions, From the properties of both research and applied to make an comprehensive comparison to the traditional stormwater drainage system, and to make an overall assessment of the eco-friendly drainage system.Some key issues in this thesis can do some contribution to supply the current gaps of ecological drainage system, to provide optimizition for technologies and products, to provide technical reference and support for Engineering technical design and implementation of rain utilization in building and sub-district.