Research Of Applicable And Durable Configurations Of Concrete Bridge

United determination soil liquid and plastic limit determination, found that for some soilsamples and cone penetration depth of the point C is small, cone penetration depth andmoisture content in the double logarithmic coordinates is not a good linear relationship, inaccordance with existing geotechnical procedures joint determination Determination of liquidand plastic limit, and can not obtain a valid test data. JTG E40-2007road soil test rules oforder in the united determination of the determination of soil liquid and plastic limit, C pointcone depth for100g cone control5mm or less through the clay, slag, fly ash, sand class liquidand plastic limit moisture content of the soil material cone penetration depth correlationregression analysis, found that the the clay cone penetration depth showed a good linearrelationship with moisture content greater than3mm; slag and fly ash cone penetration depthis greater than4mm when water content showed a good linear relationship; specification forpoint C cone depth (5mm) is not enough scientific requirements, some materials C conepenetration depth below3mm or4mm impossible with A, B two even in a straight line, thetest can not be solved. From the results of this study, it is recommended that the point C conepenetration depth between4~5mm is appropriate.When the soil is less than0.075mm smaller particle content cone penetration depth andmoisture content in the poor correlation between the number of coordinates in linear, whenthe cone penetration depth of about18mm,"bleeding" and "deflection basin" phenomenon,leading to The test can not be carried out. The existing geotextile specification requires testsoil samples over0.5mm sieve is not enough scientific content should be limited to particlessmaller than0.075mm. Through this research, come less than0.075mm content should not beless than36%of additional joint determination of the scope of application of the law: that isapplicable to a particle size of not more than0.5mm and less than0.075mm particle contentis not less than36%organic matter content of not more than5%of the total mass of thesample soil.Liquid and plastic limit results by the numerical solution for solving the soil, accurately,quickly, reducing human error trouble drawing processing test data, and provide an importanttool for the exact solution of liquid and plastic limit.Consider increasing Sheng soil cup diameter will improve the work efficiency of20±0.2mm from the test results,5cm diameter the Sheng soil Cup twice cone penetration testsuccess rate of32%, diameter7cm Sheng the soil Cup twice, cone penetration test the successrate was34%, increase to Sheng soil cup diameter is of little significance, can not beconsidered.