| The dredged spoils outlet of Pearl River delta port groups will be the bottleneckrestricting the development of port channels and coastal engineering for a long time.According to the current disposal situations of dredged spoils, the technical principles,advantages and disadvantages and the applicability of various disposal methods wereintroduced, simultaneously, the problems and countermeasures were discussedtentatively. On the base of knowing the properties and production of the dredgedspoils, integrated with the space-time distribution data of the dredged spoils from2004to2010, the factors influencing the production and change were discussed. Inaddition, we investigated the current disposal and utilization situations of dredgedspoils in Pearl River estuary port channel during2004-2010. According to the naturalconditions and the properties of dredged spoils of Pearl River estuary port channel,the best disposal scheme was selected considering the technical, economic, social andenvironmental factors.(1) In Guangzhou port, for the contaminated heavily dredged spoils which couldnot be suitable for ocean dumping and reclamation by pumping filling, the burningmethod or landfill method should be selected; for the contaminated slightly or cleandredged spoils, ocean dumping and pumping filling could be selected, and thepumping filling should be the prior method for the aim of resource utilizing.(2) In Shenzhen port, for the majority of contaminated slightly or clean dredgedspoils, offshore dumping and restricted dumping could be adopted as the preferredmethods; for large quantity of dredged spoils, reclamation by pumping filling shouldbe considered firstly, and appropriate solidification technology and resource utilizingschemes could also be chosen.(3) In Zhuhai port, the reclamation by pumping filling has been the preferreddisposal method for the dredged spoils, which could fulfill the constructiondevelopment and ease the land scarcity of Zhuhai port. For small amout of clean dredged spoils, the ocean dumping could be chosen considering the cost andtechnology.The optimum mixing proportion of the dredged spoils solidification andtransforming dredged spoils into Light Weight Aggregate by using sinteringtechnology at laboratory conditions has also been studied in this thesis. The marketprospect of dredged spoils utilization as resources was anayzed according toeconomic benefit,environmental benefit and social benefit.This thesis was expected to instruct the disposal and resource utilizing ofdredged spoils in Pearl River estuary port and promote simultaneous development ofmarine environmental protection and resource exploration and mutual benefits ofenvironment and economics. |
