🌊 COASTAL HIGHWAY TUNNEL – KEY COMPONENTS

🏗️ Main Components

1️⃣ Overburden: Soil and rock above the tunnel.

2️⃣ Concrete Lining: Supports ground loads.

3️⃣ Waterproofing Membrane: Prevents water infiltration.

4️⃣ Carriageway: Provides space for vehicle traffic.

5️⃣ Base Slab: Forms the tunnel floor.

6️⃣ Emergency Passage: Provides an escape route.

7️⃣ Ventilation & Utilities: Ensure air circulation, lighting, and safety.

8️⃣ Drainage System: Collects and removes water.

9️⃣ Anchors/Piles: Provide additional support where required.

🪨 Ground Conditions

• Alluvial Sand
• Silty Clay
• Granitic Rock
• Competent Bedrock

✅ Key Engineering Considerations

• Geotechnical investigations
• Waterproofing and drainage
• Structural stability
• Ventilation and fire safety
• Emergency evacuation
• Corrosion protection

⚠️ Note: Actual design depends on site conditions, engineering analysis, and applicable standards.

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