| Land reclamation has a long history in the coastal provinces of China.Reclamation provides reserved land resource for development of coastal area,ease conflict between human and land.With the accelerated development of economic construction,more land is needed,which results in larger scale of reclamation project and more advanced technology.Reclamation technology is simple and inefficient in the past,while now technology is diverse and efficient.However,it remains many problems should be solve.Based on features of reclamation in intertidal zone,this thesis focuses on the study of major problems and key technologies in reclamation project.Main content include:(1)Comparing the advantages of different dredger,get grab dredger is the most adaptive for obtaining seabeach clay by controlling the water content,which can reduce the work of foundation treatment.(2)Chemical stabilization is an effective means to consolidate clay.a number of tests were conducted to study the mechanism and factors affecting the short-term strength of the stabilized seabeach clay.Test results show that an increase in over-burden pressure led to increasing short-term penetration resistance under good drainage conditions.However,the influence of overburden pressure diminished with prolonged loading time.The tests also show that the water-retaining property of the CSCN-stabilized clay is better than that of the cement-stabilized clay.Generally,the CSCN is a better stabilizer than cement at initial water content between 90% and 150%.(3)Explore the stabilization effect of seabeach clay stabilized by CSCN and fly ash.Find the addition of fly ash can effectively improve the unconfined compressive strength of CSCN-stabilized seabeach sludge.(4)Come up with a set of reclamation and embankment technology,including grab dredger and CSCN stabilizer,which would be verified in practice for further investigation. |
