Infrastructure & Sub-Grade Networks
Expansive sub-grade civil engineering, medium-voltage (MV) reinforced utility culverts, stormwater networks, water distribution pipelines, and mass rock earthworks executed for major Saudi developments.
Sub-grade utility corridors engineered for generational durability.
MV-Culverts & Duct Banks
Multi-way PVC/HDPE encased duct banks, monolithic reinforced concrete utility tunnels, SEC-compliant manholes, and cable joint bays built for 33kV distribution.
- SEC & Aramco specification compliance
- Mandrel proof testing for conduit alignment
Stormwater & Drainage Systems
High-capacity precast box culverts, cast-in-place open drainage channels, perforated sub-surface collector pipes, oil-water separators, and storm detention vaults.
- Laser gradient control within 0.1% fall
- Geotextile wrapped aggregate filter beds
Potable & Firefighting Mains
Ductile iron Class K9/C40 pipelines, high-density polyethylene (HDPE 100-RC) butt-fused mains, isolation valve chambers, air release assemblies, and hydrants.
- 16-bar hydrostatic pressure testing
- Civil Defense approved fire ring mains
Bulk Earthworks & Rock Trenching
Mass excavation in hard sedimentary limestone, ripper bulldozer leveling, bench cutting, engineered fill compaction in 250mm loose layers, and slope shoring.
- Plate load & nuclear density logging
- GPS-guided grading systems (CAT AccuGrade)
Roads, Sub-base & Paving
Crushed aggregate base course (Class A/B), asphalt concrete binder (Superpave SP-19), asphalt wearing course (SP-12.5), concrete interlock paving, and granite curbs.
- Marshal stability & flow analysis
- Straight-edge rideability tolerance (≤ 3mm)
Trench Waterproofing & Epoxy Protection
Sub-grade concrete waterproofing, hot-applied elastomer bitumens, protective heavy-duty polyurethane coatings, and chemical-resistant culvert floor toppings.
- DCP & Fosroc certified systems
- Spark holiday testing for pinhole absence
Earthwork & Pipeline Inspection Protocols
| Infrastructure Parameter | Standard Code | Inspection Method | Acceptance Specification |
|---|---|---|---|
| Sub-base & Backfill Compaction | ASTM D1557 / D6938 | Nuclear density gauge test every 250m² per lift | ≥ 98% Maximum Dry Density (MDD); moisture within ±2% OMC |
| Pressure Line Hydrostatic Test | AWWA C600 / ISO 10802 | Calibrated digital gauge hold for 4 hours continuous | Test pressure = 1.5x working pressure (min 15 bar); zero drop in gauge reading |
| Gravity Pipe Alignment & Deflection | ASTM F1216 / EN 1610 | CCTV robotic crawler inspection + 5% mandrel pull | Zero obstruction, full circularity within 5% internal diameter tolerance |
| Culvert Surface DFT Coating | SSPC-PA 2 / ASTM D4414 | PosiTector electromagnetic dry film gauge | DFT ≥ 600μm two-coat epoxy; 100% pinhole-free via holiday detection |
Delivered Infrastructure Projects
DG-II Infra, Package 1: MV-Culvert Infrastructure
Sub-grade medium voltage utility corridors, trench excavation, monolithic conduit casting, and high-performance certified epoxy sealing.
Petro-V Industrial Infrastructure & Earthworks
Mass earthworks, industrial utility pipe sleeves, deep drainage trenches, and heavy machinery access corridors.
Looking for an accredited infrastructure contractor in Riyadh?
We review geotechnical soil investigation reports, utility layout schematics, and longitudinal pipeline profiles. Contact our Riyadh technical division for competitive unit-rate BoQs.