基于海绵城市地块内排涝泵站改扩建的设计探讨

摘要:

在新的暴雨强度公式下现状排涝泵站无法满足现行排涝标准下防洪要求，需要对泵站的规模进行重新核算。在排涝泵站前端内河设置下凹式绿地等海绵城市措施，将大幅度增加地块的调蓄能力，从而削减排涝模数，降低泵站的设计规模，从而降低改扩建成本。二埠泵站原设计规模为8m3/s，根据南京市新的暴雨强度公式，该排涝泵站规模应达到16m3/s，由于安江河周边设置了下凹式绿地，增加了其蓄水量，使得排涝模数降低，经过计算泵站改扩建规模为10m3/s，在现状土建不变的情况下更换其中两台轴流泵实现泵站排涝能力的提升。

Abstract:

Under the new Rainstorm Intensity formula, The current drainage pump station cannot meet the control requirements in the standards of flood control. The sponge city measure such as sunken green space will be setted up in the front of the drainage pump station, which will greatly increase the regulation and storage capacity of the plot, so as to reduce the drainage modulus and the design scale of the pump station, and then reduce the cost of reconstruction and expansion. The original design scale of ErBu pump station is 8m3/s，according to the new rainstorm intensity formula in Nanjing, the scale of the drainage pump station should reach 16m3/s. due to the concave green space around Anjiang River, its water storage capacity is increased, which reduces the drainage modulus. After calculation, the reconstruction and expansion scale of the pump station is 10m3/s. Under the condition that the current civil engineering remains unchanged, replace two axial-flow pumps to improve the drainage capacity of the pump station.