Study On The Optimum Design Of Sewage Networks

Water is the essential substance of our daily life. It turns to be living sewage after being used by people, and becomes as waste water after being used by industry and enterprise. The basic task of sewage pipe net is to ingather and transport waste water to sewage managing equipment in due course, security and without any block.The optimization of sewage pipe networks is one of the engineering optimization. It includes two aspects in content: one is the best choice for plane disposal of pipeline, and its methods follows as decision-making plot, simple trapeziform and optimizing trunkform etc; the other one is optimizing pipe parameter when the plane disposal of pipeline has been fixed, and the methods of which are linear programming, unlinear programming, dynamic optimizing, direct optimizing, hereditary arithmetic and so on. This thesis will mainly study the second aspect.The essay adopts direct optimization since various limits on sewage pipe net, occasional change on topography, and direct, easy-looking, and effortless examing characteristic on direct optimization,.Dual optimization is one of the direct and it mainly focuses on optimizing sewage pipe net from two aspects, namely to choose velocity of flow as slow as possible and speed of filling as fast as possible with the precondition of meeting various limits on sewage pipe net. By adapting the optimization thought and using Visual Basic language to workout a thorough designing program, the thesis designs the sewage pipe net perfectly by using man-machine conversation during designing program.The thesis also makes a full illustration on the optimization of sewage pipe net which consists of the optimization on pipe connection in examing well.An important task of drainage networks optimizing is the expense of drainage networks. Through analyzing main factors on the parameter of drainage networks expanse, this thesis ascertains a new parameter form ofdrainage networks expense and regressively analyses each parameter of drainage networks expanse by statistical software SPSS, approving that the new drainage networks expanse is a better parameter compared with other parameters of drainpipe net expense.