Put most simply, dredging involves little more than pulling or rolling the wet food through the dry material to provide an even coating. In simple terms, dredging means removal of material from the bottom of a water body. Dredging is the process by which a water body is deepened. Also the design should determine the required thickness of the fill, considering the final surface level of the area, construction settlements and post construction, that is, residual settlements. Dredging is a cooking technique used to coat wet or moist foods with a dry ingredient prior to cooking. Underwater excavation is called dredging. to prediction the strength increases of compressible, natural soil layers as a result of consolidation.Ī design of a reclamation area should include predictions of expected deformations to determine if they are acceptable or if soil improvement is necessary.to predict the differential settlements that can occur between different zones of the reclaimed area, which can be more problematical than absolute settlements.to predict the residual settlement that the reclamation area will undergo after area has been handed over to the client and when construction of superstructures takes place.to predict the volume of the fill material need to guarantee a reclamation level during construction and/or in the long term as stipulated by the client.The deformation and consolidation behaviours of a reclamation site should be examined and estimated for several reasons: In certain areas, like earthquake zones, this should be taken into consideration. Multiple loading cycles can cause degradation of the soil strength. The stiffness of soil at a virgin loading is lower than the stiffness at unloading and reloading conditions. Stiffness also depends on the stress history or on the over-consolidation ratio. Short-term undrained stiffness of saturated fine-grained soils will be higher than the long-term stiffness. These deformations can adversely affect anything built upon the reclamation area. ![]() In particular the presence of a soft, cohesive subsoil below the fill may cause both long-term consolidation settlements of the fill surface as well as horizontal deformations near the edges of the fill mass. ![]() A failure is the occurrence of large and uncontrolled deformations.ĭefining the stiffness of the subsoil and of the fill material are both important and yet at the same time estimating the stiffness of subsoils and hydraulic fill material are quite different matters. The strength of a soil is linked to its deformation, that is, its peak and residual shear strength. Stiffness is defined as the resistance of the fill material to stress-induced deformation.
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