Soil nailing in Malaysia.
Passive slope reinforcement using high-yield steel bar drilled and grouted into the slope face. Designed per BS 8006-2 + FHWA-NHI-14-007 + BS EN 14490 + JKR Slope Engineering Manual 2010. BS 8081 five-test acceptance programme delivered in-house. Infraconcrete Construction Sdn Bhd has delivered soil nailing across federal corridor (EKVE 450,000 m2 protected, ECRL Section 3 across 42 km + 64 km of alignment in Pahang/Terengganu/Kelantan, Lingkaran Tengah Utama Kelantan) plus hillside township developments and distressed slope rectification. CIDB G7 + ISO 9001:2015 + Professional Indemnity insurance. RM 280-650 per square metre finished face indicative.
Where soil nailing is the right answer.
| Application | Typical configuration | Indicative cost |
|---|---|---|
| Hillside cut slopes (residential, township, commercial) | Soil nail + shotcrete facing + horizontal drains | RM 320-650 per m² face |
| Distressed slope rectification (post-failure, crack remediation) | Soil nail + mesh + shotcrete + drainage | RM 450-900 per m² (emergency premium) |
| Top-down basement excavation (tight-site construction) | Temporary soil nail with mesh + shotcrete | RM 380-580 per m² (temporary), RM 480-720 (permanent) |
| Road widening at toe of cut (federal corridor) | Soil nail + DCP corrosion protection + shotcrete + drainage | RM 420-720 per m² (federal corridor premium) |
| Bridge abutment soil nail walls (new bridges, wing wall retention) | Permanent soil nail + DCP + architectural facing | RM 580-950 per m² |
BS 8006-2 + FHWA-NHI-14-007 + JKR Manual.
| Design variable | Typical range | Reference |
|---|---|---|
| Bar diameter (solid) | Y20-Y32 high-yield 460 MPa | BS 4449 |
| Bar diameter (hollow self-drilling) | R32-R76 self-drilling system | BS EN 14490 |
| Bore diameter | 100-150 mm | BS 8006-2 |
| Nail length | 6-15 m, penetrate beyond critical failure surface | FHWA-NHI-14-007 |
| Inclination | 10-15 degrees below horizontal | JKR Slope Engineering Manual |
| Grid spacing | 1.5-2.5 m horizontal x vertical | BS 8006-2 |
| Grout | Neat cement w/c 0.4-0.45, 28-day cube 25-40 MPa | BS EN 445/446/447 |
| Shotcrete facing | 75-150 mm thickness with A8-A10 welded mesh | BS EN 14487 |
| Corrosion protection (permanent) | Galvanised hot-dip or DCP (Double Corrosion Protection) | BS 8006-2 |
| Indicative ultimate bond stress (Malaysian residual soil) | Granitic 80-150 kPa; meta-sedimentary 120-200 kPa | Verified by BS 8081 suitability test |
Nine-step site sequence.
- Set-out. Nail positions transferred from approved design drawings. Surveyor sets reference pins. Pre-drilling photo record for QA.
- Platform construction. Drilling platform (rig pad for track-mounted, mast pad for hand-held, anchor system for rope-access).
- Drilling. Dry or wet drilling per ground condition. 100-150 mm bore. Production 8-15 nails per shift per crew typical.
- Bore inspection. Depth check, visual, water test where required. Re-drilling if collapse before bar insertion.
- Bar insertion. Bar with centralisers and spacer rings to ensure grout cover. Primary grout tube to base of bore.
- Grouting. Pumped from base of bore upward to expel air. w/c per spec. Cube specimens cast at intervals for strength verification.
- Facing. A8-A10 welded mesh installed. Shotcrete 75-150 mm in two layers (wet or dry mix). Curing monitored.
- BS 8081 testing. Suitability, acceptance, proof, investigation, creep tests with calibrated load cells. Pass/fail recorded per nail.
- Handover. As-built drawings, drilling log per nail, grouting log, test certificate, photo record per JKR Slope Engineering Manual handover requirements.
Where we have done this before.
- EKVE (East Klang Valley Expressway). 450,000 m² of slope face protected via soil nailing integrated with shotcrete, rockfall netting, and horizontal drains. Federal toll expressway with live-traffic phasing.
- ECRL Section 3 (East Coast Rail Link). Slope and geotechnical scope across 42 km and 64 km of alignment in Pahang, Terengganu, and Kelantan including soil nailing on cut slopes plus portal-area support.
- Lingkaran Tengah Utama Kelantan. Federal road soil nail cut slopes. Kuala Krai to Sungai Lakit, Kg Laloh to FT66.
- Hillside township developments. Across Selangor, KL, Negeri Sembilan. Class III JPBD hillside scope with documented geotechnical study.
- Distressed slope rectification. Klang Valley emergency response and remediation programme, including JKR-directed rectification projects.
Test it. Document it.
Soil nailing without BS 8081 testing cannot be relied on for permanent works. Infraconcrete operates BS 8081 testing as standard scope on every soil nail project with categories selected by consequence class per the contract requirements.
| Test category | Purpose | Typical frequency |
|---|---|---|
| Suitability | Pre-contract testing on sacrificial nails to verify design bond capacity | Minimum 3 nails per geotechnical unit |
| Acceptance | Programme-wide testing of working nails to verify design capacity | 10-25 percent depending on consequence class |
| Proof | Routine testing at lower frequency to verify installation quality | 5-10 percent |
| Investigation | Forensic testing of suspect nails | As required |
| Creep | Time-dependent displacement under sustained load (permanent works) | Selected nails on permanent installations |
Test results compiled into a pull-out test register: nail ID, position, design working load, test load applied, hold time, peak displacement, residual displacement on unload, pass/fail per BS 8081 acceptance criteria. The register is handover documentation retained for the slope dossier.
STRATA products we pair with soil nail systems.
A soil nail wall is more than the nails. The full system includes the facing, the drainage path behind the facing, and the transition to adjacent retaining structures or fill. On many sites we package the soil nail programme with proven STRATA geosynthetic products distributed locally through Starwall Sdn Bhd (sole STRATA Geosystems Malaysia distributor). Four integration patterns we use across federal corridor and township work.
| STRATA product | Function alongside soil nails | Where it changes the design |
|---|---|---|
| StrataDrain geocomposite | Wall-face drainage panel installed behind shotcrete, intercepts seepage before it builds hydrostatic pressure on the facing | Replaces traditional granular drainage blanket plus weep holes; consistent flow capacity across the full wall face, faster install, lower long-term maintenance load |
| StrataTex ST non-woven | Filter and separation layer at drainage interfaces, behind facing, and at the toe drain to prevent fines migration | Extends design life of the drainage system, particularly important in residual soil with high silt content and in zones with seasonal groundwater rise |
| StrataGrid uniaxial geogrid | Tensile reinforcement in adjacent RE wall sections where the nailed cut slope transitions to a reinforced fill structure | Allows seamless transition between cut-side (nailed) and fill-side (reinforced) of the same wall line, single design responsibility, no engineering boundary discontinuity |
| StrataWall EC RE wall | Earth-Concrete reinforced wall facing system for fill embankment sections, integrates with StrataGrid reinforcement | Engineered precast facing for tall fills adjacent to nailed cut slopes; shear-strength connection, no rebar in facing panels, IIT-tested durability |
For the full STRATA product family (geogrids, geotextiles, geocells, geocomposites, MSE wall systems) see the STRATA product catalog with brochure downloads. Soil nailing and geosynthetic scope is packaged into a single bill of quantities and supervised by the same site engineer, removing the typical interface risk between nail subcontractor and wall subcontractor.
How to engage.
| Route | Scope | Typical fee |
|---|---|---|
| Design only | Geotechnical assessment, slope stability analysis, soil nail design per BS 8006-2 + FHWA + JKR, drawings, BoQ | RM 25,000-120,000 design fee |
| Design and build | Above plus drilling, supply, grouting, shotcrete facing, BS 8081 testing, commissioning | Per-project; nail rates per pricing breakdown |
| Specialist sub-contract | Drilling, testing, supply only under main contractor coordination | Per-project schedule of rates |
Related references.
Visit us.
Infraconcrete Construction Sdn Bhd
8B, Jalan SS22/25, Damansara Jaya
47400 Petaling Jaya, Selangor, Malaysia