Settlement Analysis Of Composite Ground With Cement-mixed Columns Under The Airport

The settlement of composite ground after construction has been received more and more atentions.In this thesis,a detailed study is made on the settlement of composite ground with cement-mixed columns after construction of airport through theoretical and numerical as well as case analysis and comparisons.Firstly,the development history of composite ground is reviewed,and the status of study and application of composite foundation with cement-mixed columns introduced.Then available methods for the computation of settlement of composite ground are listed.On this basis,the applications of FEM computer software ABAQUS in consolidation and settlement analyses are illustrated by comparing the FEM resuls with the analytical ones for one dimensional consolidation problems.Further more, the computer software ABAQUS is used to analyze the consolidation process of composite ground with cement-mixed columns under an airport,and the principle of the developments of the settlement in these composite ground is revealed.Finally,the FEM results are compared with the ones obtained from traditional method,Asaoka's method and field observation,and the feasibility of using ABAQUS to calculate the settlement of composite ground with cement-mixed columns after construction of airport is discussed.It has been shown that it is very important to estimate and control the settlement of composite ground with cement-mixed columns after construction of airport,and FEM computer software ABAQUS has provide an efective way for the computation of the settlement of such composite ground.