Described hereby is the drilling trace design and construction method thereof with the example of laying the new sewer line in Puchuan Rd, Shanghai.

Optimization design for sewage pipe network system using genetic algorithm;

Applying EXCEL to the hydraulic calculation of the sewage pipe;

Integrated with a pratical example in Weitang Town of Suzhou,this pa-per introduces its design and construction process for strengthening muddy loam foundation under sewage pipeline The result shows that this kind of technology can reinforce the soft soil under sewage pipeline effectively.