The Research Of Deformation Of Soft Soil Under Low Frequency Cyclic Loading

In this paper, the research for the study of the theory of the soft soil deformation mechanism and construction practice has very important reference value and guiding significance.Deformation of soft soil foundation under circulating load is one of the important mechanical properties of soft soil foundation, how to determine the foundation soil under long-term cyclic loading mechanism of deformation of is one of the important research subject in geotechnical engineering field. In real life, due to the needs of the development of practical, will be established in the coastal developed areas such as oil drilling platform, large airports, storage tanks, high-speed railway, highway, high-rise buildings and other buildings or other structures granary, etc. The regional distribution of the deep soft clay sediments, with low permeability, high compressibility, large natural void ratio, high natural moisture content, etc. It’s on the soft soil foundation consolidation and the stability of the challenge, in a large number of production practice has produced sand. Mainly for the following work:(1)This article first summarizes the deformation characteristics of soft soil foundation under repeated loading and the research status quo and the main types of silos in China and its influence on the foundation, this paper introduces the soft soil foundation of the existing mechanism, repeated loading test results and calculation methods, and summarizes its research methods, and the definition of soft soil, the source, distribution and engineering characteristics are analyzed, at the same time, through the experimental study on the degeneration characteristic of soft soil under cyclic loading, for correct understanding and research on deformation mechanism of soft soil foundation under cyclic loading basis;(2)The interior of repeated loading and consolidation test, the qualitative analysis under repeated load under different loading ways of the pressure and the coefficient of consolidation, compression coefficient and void ratio and the change rule of basic parameters, such as the change in void ratio with load, the relations of the iterations.(3) The secondary consolidation test of soft soil foundation are studied, and on the secondary consolidation coefficient and load were analyzed, the relationship between the consolidation pressure, and the main factors influencing the secondary consolidation coefficient. At the same time, according to the research of this paper puts forward the deformation mechanism of soft soil foundation under cyclic loading the main conclusion.