某河道清淤与截污综合整治工程初步设计探讨

Analysis on Preliminary Design of a River Dredging and Sewage Interception Comprehensive Improvement Project

由于排水体制的不完善性，某市T河道水质已达不到地表水V类水质标准，城市地域的整体形象和商业价值也大幅降低。该市政府计划投资8617．9万元，对T河道开展清淤与截污综合整治工程，拟对整段T河道进行清淤处理，淤泥量约75．32×10^4m^3，并沿T河道南北两岸敷设DN600—1000截污干管，将沿线排污口的污水截流至截污干管中。从清淤方式选择、淤泥土方量计算、截污干管管位设计及管材等方面，对T河道的清淤和截污工程初步设计进行了探讨与分析。

Due to the imperfect drainage system, the water quality of a river called T in a city failed to meet the V class water quality standard, the whole image of the city area and the commercial value were also greatly reduced. The city government planned to invest 86. 179 million yuan for T river dredging and sewage interception comprehensive improvement project. The T river would be dredged with a volume of about 753 200 m^3, and DN600 to DN1 000 sewage pipes would be laid along north and south sides of the T fiver to intercept sewage from the outfalls. The preliminary design of T fiver dredging and sewage interception c project was discussed and analyzed in terms of selection of dredging mode, calcula- tion of sediment volume, location and materials of intercepting sewer.