Research On The Influencing Factors And Their Interrelationship On The Mechanical Properties Of Clay With Different Sand Content In Rheological And Solid States

At present,the research on the rheological-solid state mechanical properties of general soils from clayey soils to sandy soils and studies on their interrelationships are relatively few.In this paper,kaolin and fine sand are used as basic materials,and 5kinds of soil samples from clay to sandy soil are prepared according to different proportions.Through experimental research,the rheological and solid state mechanical properties and influencing factors are explored,based on the test results.The relationship between the rheological state and the solid state is analyzed based on the concept of particle matter confinement,and the relationship between rheological-solid state mechanical properties of soil and its influencing factors and slope stability is explored,and based on this,some suggestions are made.Improve the rationality of slope stability.In this paper,creep properties and unconfined compressive strength tests are used to study the mechanical properties and relationships of five different soils in rheological and solid state.The relationship between the influencing factors such as clay content,water content,loading rate,compactness,and soil rheological-solid mechanical properties was studied.The tests show that the non-decay critical stress of the soil under rheological conditions and the compressive strength under solid state all increase first and then decrease with increasing soil clay content.When the clay content accounts for60% of the total mass of the soil,it reaches its maximum.The creep deformation of soil under rheological conditions increases with the increase of water content.The critical stress of non-attenuation creep decreases with the increase of water content.The compressive strength of soil in the solid state has the tendency of increasing first and then decreasing with the increase of water content.The maximum compressive strength of various soils appears at the water content of about 60% of the plastic limit water content.Based on the concept of particulate matter constraints,the paper analyzes the mechanism of the transition relations between discrete states,rheological states,and solid states.The change of the restraint state of the particulate matter determines the transition of its mechanical state.The ODI constraint is the general constraint form of the particulate matter.Under certain conditions,it can be transformed into a consolidation constraint and a contact constraint.The four constraints andcorresponding degrees of freedom of ODI constraints change and combine to form a transition from rheological state to discrete state and solid state.In this paper,through the study of the relationship between soil rheology-solid properties,the effects of clay content and water content on slope stability are analyzed.When the clay content is 60% of the total mass of the soil,the soil has the strongest resistance to damage in the rheological state and the solid state.The soil with 60% clay content can be considered in the selection of the slope filling.Sandy soil has good drainage performance,but its strength is low.On slopes with smaller slopes,sandy soils are more suitable for filling materials.For slopes with high clay content,drainage performance is poor,and the influence of moisture content on slope stability should be considered.The higher soil moisture content,the ability to resist destruction in the rheological-solid state is significantly reduced,and the creep deformation value of soil increases with the increase of moisture content.Creep is an important cause of slope failure,and Along with the entire process of slope failure,therefore,the damage of the water content change to the slope should be reduced as much as possible,and the change of the moisture content should be paid more attention to the slope with high clay content.