ABSTRACT

The theme of my graduation design is the Sewage Project in Tuojiang City. The design consists two parts ,the Drainage Pipeline System and the Municipal Sewage Treatment Plant(PSTP). Tuojiang City is located in the south of Sichuan Basin ,with a temperate and humid climate. There are some confluent pipelines ,but most of them are worn down by the years without repair ,and some even blocked up or broken. In the city ,there isn’t the drainage pipeline net , so the waste water in the city proper has to be discharged into the water without treatment ,which seriously pollutes the River A. In the design ,I take complete separate sewage system as Tuojiang’s drainage pipeline system. According to the design, the waster water in the district of Jiangbei Ⅱ is collected by main pipe, flows together with the waste water from the district of Jiangnan Ⅰ through Daohong pipe, and then is carried to Sewage Treatment Plant through gravity. For rain, I design it to be discharged nearby. Along the River A, there are several emission entrances, which discharge the rain into the river. The industrial waste water can be drained to the sewer only after it is partly treated and meets the Grade Ⅲ of 《Comprehensive Standard For Waste Water Drainage》 (GB8978-96). Considering the request for denitrification and dephosphorization, the Sewage Treatment Plant takes A/A/O technology, and its process is : the medium screen→the pumping station→fine screen→grit pool→anaerobic pool→anoxic pool→oxic pool→the secondary sedimentation tank→the disinfection tank→parshell flum→discharged into River A。And the process for sludge treatment is sludge → grawity thickening tank → sludge dewatering room. After the treatment, the waste water will meet the 《Comprehensive Standard For Waste Water Drainage》 (GB8978-96) and then is discharged into River A.




Designer :arlex
June,1998

本毕业设计为时代广场商住楼给水排水设计，建筑总面积20000余m2，建筑总高度46.55m。主体建筑为15层（地下两层），裙楼6层。地下两层为小型停车库，地上一层为商铺，二层至十五层为住宅。
本设计针对建筑主体、裙楼及地下室进行给水排水设计。设计内容包括室内给水系统、消防系统、排水系统、屋面雨水排水系统以及地下车库的给水排水及消防系统。给水系统设计中采用了变频调速恒压供水设备，屋顶不设水箱；排水系统废污分流；消防不分区；雨水采用内排水系统。通过设计计算，本设计对各系统所需水泵、管材等进行了选型。通过设计计算绘制出各平面图、系统图及大样图。


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