Numerical Investigation On The Effects Of Nailing Parameters On Soil Nailed Inclined Face

Abstract

The Stability Of Nailed Slopes Is Depending Upon The Mechanism By Which Resisting Tensile Forces, Induced By The Nails, Are Transferred Into The Ground Via Friction Or Adhesion Mobilized At The Interface. Despite The Widespread Use Of Soil Nailing, There Is A Lack Of Comprehensive Understanding Of The Effects Of Nailing Parameters On The Behavior Of The Structures. The Present Investigation Aimed To Explore The Impact Of Various Nailing Parameters, Including Length, Inclination, Diameter, And Spacing Of The Nails, On The Performance Of Soil-Nailed Inclined Face Utilizing Numerical Analysis With Plaxis Software. This Investigation Employed Finite Element Analysis To Replicate The Behavior Of Soil-Nailed Face Under Static Loading Conditions While Varying The Nailing Parameters. A Total Of Five Distinct Models Were Developed For Each Parameter To Examine The Influence Of Each Soil Nail Parameter On An Inclined Face By Systematically Adjusting Their Values. One Model Was Constructed Based On The Parameter Values Recommended By The Federal Highway Administration, While The Remaining Four Models Were Developed Through Increments And Decrements Of The Recommended Values. In Total, 22 Models Were Developed And Analyzed. The Factor Of Safety Was Computed Both Before And After The Construction Of The Soil Nail Within The Model, To Ensuring The Stability Of The Soil Nailing And Safeguarding The Model's Integrity. This Study Determined That The Factor Of Safety Computed From The Model Developed Using The Recommended Parameters Values Was 1.694. The Calculated Value For A Nail Length Of 1.5m Was 1.435; This Value Increased To 1.567, 1.694, 1.725, And 1.743 For Nail Lengths Of 2.5m, 3.5m, 5.25m, And 7m, Respectively. The Remaining Parameters Were Analyzed In A Similar Fashion; Generally, As The Length Of The Nail Increased, The Factor Of Safety Also Exhibited An Increase; However, Beyond A Certain Point, Approximately 3.5m, The Rate Of Increment Began To Decline. A Similar Trend Was Observed For Diameter; Moreover, As The Spacing Of The Nails Increased, The Factor Of Safety Correspondingly Decreased. However, Beyond A Certain Point, Around 1.5 Meters, The Rate Of Increment Began To Diminish. This Suggests That Decreasing The Space Between Nails Less Than 1.5m Might Not Significantly Increase Stability And Could Be Less Cost-Effective. Similarly, As The Angle Of Nail Inclination Increased To 15 Degrees, The Factor Of Safety Also Exhibited An Increase, Yet The Factor Of Safety Began To Decline When The Angle Of Inclination Was Further Increased. This Study Contributed To The Advancement Of Numerical Modeling Techniques For Geotechnical Engineering Applications And Established A Foundation For Future Experimental Investigations To Substantiate The Numerical Findings.