Mechanical Properties And Consolidation Characteristics Of Dredged Sludge With High Water Contents

With the whole society pay more attention to environmental quality, various environmental improvement and protective measure be put in practice in succession. At present, during our country renovating the polluted landlocked lake and river and coastal port channel, a large amount of contaminated sludge is produced. How to handle these contaminated sludge to prevent it from leading to the secondary pollution to environment becoming a problem which the academia and the project care about together. At the same time the investigation of the mechanical properties and consolidation characteristics of contaminated dredged sludge is the base work of deciding what kind of methods to deal with contaminated sludge and further studying the rationality of various treatments and handle methods. So this dissertation aiming at contaminated sludge of Qinhuai River carrying out following several researches mainly:1, Aiming at sludge of Qinhuai River carrying out the conventional soil test to mensurate the routine mechanical parameter, the result of test has revealed that the sludge have the properties of high water content, high compression properties, high pollution matter content, low intensity, low density and low permeability.2, According to the soil test result ——the physical and mechanical characteristic ofsludge, relation between the law of change of every physics mechanics characteristicindex , every index ,etc have been analyzed and studied utilizing data that testmeasured. Especially to the compress test result, this dissertation studies theconsolidation characteristic and second consolidation characteristic of sludge.3, Study three resulting classical consolidation theories according to forefathers ,based on analyzing and studying soil consolidation mechanism and sludgeconsolidation characteristic of Qinhuai River, appraising and studying theconsolidation theory that should be adopted when similar soil was to be researchedlike this text research object to fine describing the actual soil consolidationcharacteristic.4, On the basis of research result of forefathers, this dissertation analyzing andstudying several kinds of confined disposal facility that was used in the world atpresent, and utilizing popular ADINA finite element analyzing software to analyzetwo kind of model , simulation the process of consolidation of sludge and study thechange of pore pressure and effective stress of sludge during consolidation.