Study Of Drainage Characteristics In Drainage Pipe System In High-rising Building

In the domestic and foreign high-rise building drainage system, drainage water often over ability, can cause drainage pipe water seal damage. causing odor into indoor drainage pipelines, which brings great danger for indoor environment safety. The study of drainage characteristics in high-rise building drainage system, not only can solve the drainage pipe discharge capacity and water seal damage, but also to provide technical parameters for <design of building water supply and drainage standard>.This experiment used the highest proportion of real building experimental tower, using constant flow drainage detection method, drainage from the top floor and lower layer by layer of the drainage way, study common UPVC single riser drainage system and doublestack drainage system drainage capacity and pressure variation, make clear the correlation between drainage system height, air pressure and discharge capacity, compare the condition of constant flow and instantaneous flow detection methods of drainage drainage discharge capacity and water seal damage, analyzes the influence on the slope of drainage pipe pressure drainage system and drainage pipe elbow.The results show that, common UPVC single pipe and double pipe drainage system with constant flow drainage method, pipeline pressure fluctuation and flow of drainage and drainage system are closely related to height, adding ventilation tube can significantly increase the carrying capacity of each floor of the drainage system. When the drainage flow, with the lower floor drain, double vertical pipe drainage system in positive pressure decreased significantly more than the single pipe system, can effectively reduce the damage of seal damage.No matter constant flow nor instantaneous flow drainage detection method, pressure is increased with increasing the height of the floor, pressure when use constant flow detection influenced obviously, negative pressure change on the discharge capacity of single pipe system more significant; the maximum negative pressure occurs in the drainage layer under the layer with constant flow drainage method, the maximum negative pressure occurs in the drainage layer under the layer with constant flow drainage method, the instantaneous flow detection method when the maximum negative pressure drainage in four layer drainage layer below, reproducibility of constant flow is higher than instantaneous flow, and change drainage parameters more regularity, however instantaneous flow close to the real the drainage process.Connecting pipe type has significant influence on the pressure, positive pressure is less than 90 degrees swan neck by 45 degrees swan neck, but the two will not have a significant effect on the maximum negtive pressure; drainage slope of the single riser drainage system can influenced negtive pressure and positive pressure, reducing slope can reduce the pressure amplitude of drainage system.