Soft Soil Consolidation Settlement Characteristics

Through abnormally testing the foundation soft clay from a high-way in Sichuan province, the paper researches the reason that volumetric strain, deformation and lateral force coefficient of saturated clay change with changing of degree of consolidation and time. Firstly, the paper puts out the formulas used to calculate displacement by secant modulus, which think about the influence on lateral displacement. Based on the test data, it corrects the showed way of coefficient of consolidation, which simultaneously reflects each relation among load, displacement and time.Secondly, the paper proposes two kind of theoretical models used to calculate the displacement of consolidation of normal foundations of saturated soft clay by the way that Terzaghi thinks about the influence of multistep constant loading on the average degree of foundation and the way of superimposing displacement of consolidation. The two models reflect the influence of load, displacement and time on displacement of consolidation.After calculating displacement with imitation in laboratory and in place by two theoretical models and contrasting them, the paper thinks the theoretical model proposed by the paper more adapts to calculate the displacement of consolidation of normal saturated weak foundation, which makes use of the way of superimposing displacement of consolidation.