单立管排水系统通水能力的试验研究

研究单立管排水系统的通水能力和气压波动情况,考察底部排出横管管径和排出横管连接弯头等因素对立管压力波动的影响.结果表明,当公称外径dn110的排水立管底部采用2个45.弯头连接dn110的排出横管时,单立管伸项通气系统的通水能力约为4.8 L/s;放大底部排出横管管径并不能有效提高单立管系统的通水能力;设置2个45°弯头连接排出横管稍微改善了立管底部排出的水力条件;本试验测出单立管不伸顶通气系统的通水能力约为3.2 L/s.

Study on flux capacity of single stack drainage system

Water passing capacity and air pressure fluctuation inside the single stack sewer were studied. The influencing factors on air pressure fluctuation in stack, such as the size and the connection bend of outlet horizontal pipe etc were investigated. The results showed that for vertical sewer pipe of nominal diameter of 110 mm with roof ventilation at the top and connected to outlet horizontal pipe of same diameter at the bottom by two 45-degree bends, the flux capacity will be about 4.8 L/s. To enlarge the size of the horizontal pipe did not enhance the water passing capacity effectively. However, the setup of two bends improved slightly the hydraulic conditions in the bottom of discharge stack. According to this test, the water passing capacity of the single stack system without top ventilation was about 3.2 L/s.