Study On Mechanism And Improvement Of Engineering Degradation Of Detected Soil

In this paper,the physical and mechanical properties of the contaminated soils of detergent powder and biological enzyme modified detergent powder were studied by indoor experiment.The results showed that the bio-enzymatic modified detergent powder Compression characteristics.On the basis of literature research,this paper studies the contents of three aspects through laboratory experiment.Firstly,the influence of different mass fraction of detergent on soil physical and mechanical properties was studied experimentally.Secondly,the changes of the physical and mechanical properties of the polluted soils under different biological enzyme contents were studied by using the biological enzyme as the modified material to improve the contaminated soil of the detergent powder.Thirdly,based on the two-logarithmic curve method and the normalization method,the effects of the consolidation yield stress and the pore index were used to study the effects of the biological enzyme on the modified soil Compression properties.The research is as follows:1,washing powder pollution soil physical and mechanical properties.The mass fraction of the washed powder was 0g/kg,3.0g/kg,6.0g/kg,12g/kg and 24g/kg respectively.The relationship between the mass fraction of the detergent powder and the mass fraction of the detergent powder was studied by the liquid-plastic limit test.The maximum dry density of the contaminated soil was studied by the heavy-duty standard compaction test.And the optimum moisture content was changed with the mass fraction of the detergent powder.The relationship between the shear strength of the contaminated soil and the detergent powder was studied by the rapid shear test.The compressibility of the contaminated soil was studied by the consolidation test And the relationship between the compressive modulus and the mass fraction of the detergent powder.2,biological enzyme modified detergent powder physical and mechanical properties of contaminated soil.he results showed that the ratio of the enzyme was 0,1:100,1:200,1:300 and 1,respectively.:400,the ratio of the ratio of biological enzyme to dry soil.The relationship between the mass fraction of the detergent powder and the mass fraction of the detergent powder was studied by the combination test of the liquid and plastic limit.The mechanical properties of the modified soil were improved with the mass fraction of the detergent powder.The maximum dry density and the optimum moisture content of the contaminated soil were changed with the mass fraction of the detergent powder.The shear strength of the modified soil was improved by the rapid shear test.The shear strength of the modified soil was improved by the consolidation test The relationship between the compressive coefficient and the compressive modulus of the modified soil with modified detergent powder was studied.The results of the experimental study were compared with those of the untreated detergent powder.3,Study on Compressive Properties of Contaminated Soil by Modified Enzyme.Through the consolidation test,the three different detergent powder content(Og/kg,6.0g/kg,24g/kg),five different biological enzyme ratio of the compression characteristics(0,1:100,1:200,1:300,1:400).The sample moisture content is controlled at 50%and the overlying load is 12.5 kPa,25 kPa,50 kPa,100 kPa,200 kPa,300 kPa,400 kPa,800 kPa and 1200 kPa,respectively.In order to obtain the influence of biological enzyme content on the compression characteristics,and the optimum amount of biological enzyme was obtained.The article adopted two theoretical methods to study the following:(1)Using the Butterfield double logarithmic curve method to determine the consolidation yield stress py 'of the sample,the relationship between the consolidation yield stress py' and the biological enzyme content was studied.(2)Introducing the normalized parameter Pore index IV to evaluate the biological characteristics of the modified aerosol modified detergent,and to study the relationship between the pore index IV and the biological enzyme content.