Study On Adaptive Characteristics And Settlement Of Undisturbed Silty Soil In Foshan

In view of the engineering characteristics of soft soil,the settlement of soft soil has been a hot topic in continuous research.There are many factors that affect the deformation and settlement of soft soil foundation,and there is mutual coupling effect,as a result,there are many methods for calculating the settlement of soft soil foundation which have their own advantages and disadvantages.Adaptive stress and adaptive shear stress are new concepts proposed by Professor Liu Jianjian from Chang'an University,and the relevant experimental analysis has been carried out in loess and red clay,which has great advantages in calculating the deformation of remolded soil,but it has not been tried in the original clay silt.Based on this,the subsidence deformation of saturated undisturbed soil and saturated remolded soil under K₀ condition is studied and discussed in this paper through uniaxial lateral confinement compression test combined with theory.The main research work is as follows:1.In this paper,the basic physical properties test,laser particle size distribution test,limit moisture content test and permeability coefficient test of unmodified silty soil were carried out,and the particle size distribution and state of the soil were determined.According to the regulations,the soil studied in this paper was defined as"clayey silt".2.Through K₀ uniaxial lateral confining consolidation compression test of unmodified soil mass,the diachronic measured data of stress,strain and pore pressure are studied,and the influence of loading rate on the test is analyzed.According to the actual project,the stress-strain analysis and the adaptive characteristic analysis of the whole process of saturated unfractured soil under K₀ condition are carried out from two aspects of the loading consolidation section and the dead load consolidation section.3.Based on the measured data of the remolded soil and the unmodified soil in uniaxial lateral confinement and compression tests,a comparative analysis of the soil in the two states is made from the perspectives of microstructure,load rate,stress path and stress duration,etc.,and the similarities and differences of the adaptive characteristics of the soil in the two states are discussed.4.Through to the two states of soil adaptive shear stress and axial strain curve for data fitting,get the function between the two met hyperbola change law of A₂ and test parameters can be said of undisturbed soil mechanics properties,stress history,structural and 1/B₂ can be expressed in uniaxial confining undisturbed soil consolidation test,the adaptive when shear stress for q's ultimate dependent variable.