Research On Behaviour Of Cast-in-situ Concrete Thin Wall Pipe Pile Under Lateral Load

Nowadays,The PCC pile have been widely used for soft ground improvement and application of foundation Engineering .The behavior of PCC pile ,that subjected to lateral load has been studied in this paper. The behavior of the PCC pile has involved moment and horizontal displacement and load of PCC pile.They are studied by in the physical model experimen,field test Finite element numerical analysis, and exponential progression solution. In additional, the comparatively computal analysis are carried out among PCC pile, cast-in-situ concrete circular pile, prefabricate concrete square pile, and obtain some signification conclusion. For details. The main contents are as follow:1.. developing a physical model experiment can simulate the behavior of the PCC under lateral load,the curve of p-y and curve of moment distribution and load against soils are obtained .the results indicated that performance of the PCC pile under lateral load is very fine .2, Finite element theory is applied to research of PCC pile under lateral load. On the basis of predecessor work, the thesis developed FEM program of the pile under lateral load, which is based on Winker ground model ,and m method is introduced into FEM program. The calculation values is closed to the results of field and laboratory model experiment ,the finite elment method is verified.3 Elastic exponential progression solution which is widely recognized by the field of civil engineering are applied to analysis of the PCC pile under lateral load, and the results are compared with that of finite elment method. Accordingly, the validation of program is once more proved.4 Main parameters of the PCC pile such as length of pile, diameter of pile , rigidity of pile ,wall thickness of pile are analyzed by the method of the thesis. The calculation results indicates that most markedly factor is pile diameter, in the next place pile length and property of ground soils, the impact of rigidity and wall thickness of pile are relatively little.5, Comparatively computation analysis is carried out among PCC pile and cast-in-situ concrete circular pile and prefabricate concrete square pile by program which is develop in the paper .Two angles such as the same diameter and transect area of the pile are analysed .The advantages of the PCC pile have been proven on the aspects of technique and economy in the paper.