Determination Of Using Standard Penetration Test In Predicting Index Properties And Shear Strength Parameters Of Fine-Grained Soils: In Case Of Kombolcha Bypass Road

Abstract

Soil Properties Can Be Determined Through Field And Laboratory Tests, With Special Techniques Like Undisturbed Samples And Initial Overburden Pressures Needed. Field Tests, Like Spt, Are Conducted In Original Field Soil, And Soil Strength And Compressibility Are Crucial Issues. Correlation Between Soil Characteristics And Load Tests Is Essential For Selecting Appropriate Tests. The Prediction Of Index Characteristics And Shear Strength Parameters Of Fine-Grained Soils For The Kombolcha Bypass Road Using The Standard Penetration Test Is Presented In This Study. Soil Properties Are Important For A Variety Of Geotechnical Engineering Tasks. To Determine These Characteristics' Values, Certain Techniques Should Be Applied, Such As Using Undisturbed Samples And Taking The Original Overburden Pressures Into Account. It Is Difficult To Get Completely Undisturbed Samples Due To Handling, Shipping, Overburden Pressure Release, And Poor Laboratory Conditions. Consequently, Without The Need For Further Laboratory Testing, The Standard Penetration Test (Spt) Provides An Excellent Method To Estimate Some Characteristics, Such As The Shear Strength Parameters (C & ??), For Dry Silty Clay With Sand Soil. Standard Penetration Tests Provide A General Estimate Of The Soil's Strength. The Inexpensiveness And Simplicity Of Use Of This Test Is Its Biggest Advantages And The Main Reasons It Is So Widely Used. When Appropriate-Quality Borehole Samples Are Hard To Come By, Such Those With Clay And Sand Or Gravel, The Estimated Shear Strength Parameters That May Be Calculated Can Come In Handy. The Main Objective Of This Study Is To Determine The Use Of Standard Penetration Test In Estimating The Shear Strength Parameters (C & ??) And Index Properties (Ll, Pl, Pi) Of Silty Clay With Sand Soil. The Relationship Between The Soils' Shear Strength Characteristics And Index Properties In The Research Region Is Ascertained Using Linear Regression Analysis. To Find The Correlation Required The Standard Penetration Test (Spt) Was Corrected For Field And Dilatancy Effect. The Results Of The Study Showed That The Spt Number Is A Good Estimator Of The Shear Strength Parameters Of Soil. This Suggests That The Sptn-Values Can Be Used As Indicator Of The Strength Characteristics Of Fine-Grained Soils.