| When analyzing and evaluating the stability and deformation characteristics of the various types of Engineering on soft foundation, if using the conventional design method which only considers the static balance, would not only cause unnecessary waste of basis stifiness, but lead to underestimation the stress of the structure, and threat to the security of the structure. Therefore, using the interaction design method which considers the stress balance and deformation compatibility condition is an important means to ensure the rationality of the result and safety of the project.In this paper, the deformation of the foundation which is under the action of sluice has been investigated through the theory of interaction. The experimental observation and numerical analysisi results show:1ã€The direct shear test and ring shear test for the soft soil which was taken from the reclamation project in eastern Shantou were carried out. The test results show that, the strength of soft soil is related to the degree of consolidation of soft soil, and changes along with the development of shear displacement and vertical displacement, under the influence of the shear displacement and vertical displacement of the soil, the strength of the soft soil tends to a stable value which can be used as strength parameters in the numerical simulation.2ã€Through the establishment of the interaction control equation of the foundation, base and superstructure, then using the finite element software ABAQUS, the numerical analysis is carried out. The calculation results show that:1) The deformation of the ground meets the requirement of design specification for sluice whih requires that the maximum settlement is less than 15 cm and the maximum differential settlement is less than 5cm.2) The change of superstructure stiffness have a greart affect on the deformation of the ground while have a little affect on the local deformation of the ground, but the average settlement of foundation is unchanged. The effct of the stress of basis is small, but have a great influence on the stress of superstructure, when the superstructure stiffness is bigger the superstrcure stress is bigger.3)The change of the base stiffness has a great effect on the stress of the superstructure. When the base stiffness is bigger the superstrcure stress is smaller. The increasement of the base stiffness can effectively reduce the local deformation of the ground, and make base force distribution more uniform, but has little effect on the overall deformation of foundation and the average settlement of foundation is unchanged.4) The change of composite foundation stiffness has a little effect on the structure stress and has a great influence of the ground overall deformation, but the influence of the local deformation of the ground is small. |
