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Research on the Deposition in Box Culvert Near the Industrial Port of WISCO

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Tutor: LiZuo
School: Wuhan University of Technology
Course: Environmental Engineering
Keywords: box culvert,sedimentation,sediment,induration,slag,desilting
CLC: U653.99
Type: Master's thesis
Year:  2009
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The box culvert constructed in the industrial port of WISCO cost high.It mainly serves for the industrial drainage of WlSCO,SINOPEC of WUHAN and QIANGSHAN thermal power plant,with farraginous property.During the construction of new box culvert,severe siltation of old box culvert was found when the coping was uncovered,only "woodpecker" can weed out,hardened sediment caused a bad influence to the old box culvert use,yet the box culvert has long route and the drainage can not be stopped,thus desilting will be very difficult.For preventing desiliting of new box culvert,comprehensive research for drainage of new box culvert is very indispensable.Because of the lack of research on siltation in box culver presently,and the complexity of its drainage,we can only simulat prism channel to study its hydraulics parameter,rivers and open channel¡¯s sediment movement to study its sedimentation.This article mainly begins with pollutant research,hydraulics parameter test,water quality investigation,and modern testing technique for the composition,to calculate sediment equilibrium;examine its erosion and sedimentation,estimate the quantity of sedimentation,thus we can analyse the reason of composition¡¯s induration, give reasonable advice to pollution source controlling and the box culvert desilting,to increase the new box culvert¡¯s service time limit.This article gets such conclusions:(1) The box culvert has large flow rate with 54,003m~3/h in flood season,and little flow rate with 20,649m~3/h in low water season,its main resourses are puddling plant in WISCO and QIANGSHAN thermal power plant.(2) The bad water quality is mainly caused by coke plant,coke biochemistry and SINOPEC of WUHAN,the sediment mainly comes from puddling plant in WISCO.(3) Erosion occurs during low water season,sedimentation occurs during flood season,it is not certain during other time.The average rate of sedimentation is 3.3 cm/month in flood season,and 4.55cm/month in low water season.The actual thickness of sediment increases with 4.1 cm every year.(4) The composition is constituted by slag,quartz,ferri mineral debris, cementation¡¯s compositions are calcite and calcium hydroxide mainly,and the reason of induration is caused by the hydration of slag.
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