Teico Overseas LLC

Project We Are Proud Of

Slope Protection Works for the Wadi Adai – Al Amerat Road (Phase 2)

Delivering Advanced Slope Protection Along One of Muscat's Steepest Mountain Corridors

Phase 2 of the Wadi Adai – Al Amerat Road development involved deep rock cutting through rugged, high-gradient terrain. These newly formed slopes presented varying levels of instability—from surface raveling to potential high-energy rockfall events—requiring a multi-system protection strategy.

TEICO deployed a combination of mesh containment and energy-rated rockfall barriers to secure the mountain face and ensure safe passage for motorists along this critical transport link.

Project Overview

This phase of the road expansion introduced fresh cut slopes with highly variable rock quality. To ensure stability across the corridor, surface protection and high-energy interception systems were installed according to detailed geotechnical mapping and risk zoning.

Project Details

Project: Wadi Adai – Al Amerat Road (Phase 2)
Location: Wadi Adai – Al Amerat Corridor, Muscat, Sultanate of Oman
Client: Muscat Municipality – Sultanate of Oman
Scope: Slope Protection
Quantities Delivered:
- 80,000 m² Mesh
- 320 m² Rockfall Barrier – 1,000 kJ
- 750 m² Rockfall Barrier – 3,000 kJ
- 210 m² Rockfall Barrier – 5,000 kJ

Challenges Identified

Fresh Rock Cuts with Significant Surface InstabilityWeathered layers and loose blocks required immediate containment to prevent raveling onto the road.
High-Energy Rockfall ExposureSteep slope geometry created the potential for rock blocks to accelerate and reach high-impact energies.
Variable Geology Along the AlignmentChanging rock mass conditions demanded adaptive solutions suited to each risk zone.
Long Slope Sections Adjacent to Active TrafficSafety and precision were essential during installation to avoid disruption to road users.

Solution Implemented:

1. Mesh Surface Containment System

•Installed 80,000 m² of mesh across exposed slope faces to restrain loose material and control surface degradation.
•Provided close-contact stabilization across long and irregular slope profiles.

2. Multi-Energy Rockfall Barrier Systems

•Installed three levels of energy-rated barriers based on site-specific hazard assessments:
•1,000 kJ Barrier (320 m²): For moderate rockfall zones requiring reliable interception and controlled energy absorption.
•3,000 kJ Barrier (750 m²): For high-risk areas where larger blocks and longer fall heights were identified.
•5,000 kJ Barrier (210 m²): For extreme-energy zones, providing maximum impact capacity along the corridor.

3. Targeted Stabilization & Coordination

•Carried out scaling, clearing, and anchoring works prior to barrier installation.
•Integrated edge treatments ensured continuity between mesh-covered sections and barrier systems.