📋 Case Study

Landfill Final Cover Anchored Wall System

12 m high waste face with 3H:1V slope requiring permanent stabilization without excavation

🏗️ Project Overview

Closed municipal landfill slope stabilization, Georgia

🎯 Challenge

12 m high waste face with 3H:1V slope requiring permanent stabilization without excavation

🔧 Design Approach

Soil nail wall with corrosion-resistant grouted nails, shotcrete facing, and HDPE drainage mat

📐 Design Diagram

_ult=245 kN Global Stability FS = 1.58 12 m High Waste Face • No Excavation 12 m 3H:1V Wall Structure Soil Nail Drainage Mat

AI-generated project design illustration

📐 Key Calculations

Nail Pullout Resistance

T_ult = π·d·Σ(α·τ_f·L_i)

Result: 245 kN/nail

Exceeded design load by 2.1×

Global Stability with Nails

FS_global = Σ(R_i)/Σ(D_i)

Result: 1.58

Met EPA RCRA Subtitle D requirement

📊 Results

Achieved 100-year design life certification; no nail corrosion observed at 5-year inspection

💡 Lessons Learned

• •Grout chemistry must match leachate pH profile
• •Shotcrete thickness must accommodate nail head embedment and drainage mat compression

✅ Key Takeaways

• 1Grout chemistry must match leachate pH profile
• 2Shotcrete thickness must accommodate nail head embedment and drainage mat compression