Geosynthetics for port and reclamation in Malaysia.
Malaysian reclamation projects sit on soft marine clay (typical sᵤ 5-15 kPa, depth 5-30 m). The highest-impact geosynthetic is StrataTex HSR woven PET basal mat in the 200-1000 kN/m range, laid below the dredged-sand fill to resist lateral spreading. Combined with PVD and staged loading, this enables high-fill reclamation that would otherwise fail by mud-wave bearing failure.
Five distinct port and reclamation scenarios.
1. Basal reinforcement mat
StrataTex HSR 200-1000 kN/m laid horizontally below the dredged-sand fill. Resists lateral spreading at the embankment toe, prevents bearing failure on soft marine clay. Typical sequence: prepare seabed, lay HSR (often as multiple sheet panels seamed), place initial drainage blanket of granular fill, then bulk-fill in controlled lifts with settlement monitoring.
2. Containment dike geotextile
Heavy nonwoven PP 400-800 gsm wrap on the dike core, or as filter under riprap armor on the dike face. Stops core fines from washing out during tidal action and storm events.
3. PVD + basal mat combination
PVD (prefabricated vertical drains) installed through the soft clay accelerate consolidation; basal HSR mat manages lateral spread during the loading phase. Standard combination on most Malaysian reclamation projects of any scale.
4. Sand separation and bunding
Nonwoven PP geotextile sock and tube systems for hydraulic dredge-pipe inlet protection, dewatering bags, and sand-loss reduction at the perimeter of working zones.
5. Drainage and de-watering
StrataDrain geocomposite at the dike toe and within fill to accelerate drainage; nonwoven wrap around perforated pipe drainage networks within the reclaimed area.
6. Permanent erosion-control armor
StrataWeb HDPE geocell filled with concrete or rock as permanent armor on dike crests and tidal slopes. Replaces interlocking-block revetments in cost-sensitive contexts.
Why 1000 kN/m is sometimes required.
The required wide-width tensile of a basal mat is driven by (1) lateral thrust from the fill column on the soft layer and (2) the bearing-capacity reserve available from the soft layer. For Malaysian reclamation typical inputs (fill 8 m, γ 18 kN/m³, sᵤ 10 kPa, marine clay 15 m thick), the calculation routinely yields T_req in the 400-800 kN/m range. Federal-scale port projects (large container yards or runway-grade reclamation) can require 1000 kN/m or higher when sᵤ drops below 8 kPa. STRATA's HSR series covers this full range; we hold the project-specific datasheet matching to your borehole through Starwall.
Sequence that controls risk.
- Seabed preparation: remove ultra-soft surface mud, level. Sometimes preceded by toe-key dredge.
- HSR sheet lay: roll-out perpendicular to design tensile direction. Overlap or seam per design (overlap 1.0-2.0 m for unsewn; prayer-seam stitching for tensioned applications).
- Granular drainage blanket: 0.3-0.5 m of clean sand or fine gravel above HSR. Protects HSR from puncture during PVD installation.
- PVD installation (if required): driven through the drainage blanket and HSR into the soft layer at 1.0-1.5 m spacing.
- Staged bulk fill: in lifts of 0.5-1.0 m with settlement-monitoring plates between lifts. Loading rate controlled by undrained-strength gain monitored via field vane.
- Surcharge if required: overload by 1.5-3.0 m to accelerate settlement under designed loading.
- Surcharge removal and dike completion: final crest level + armor + drainage.
Combined reclamation scope.
Port or reclamation project spec or quote?
WhatsApp the borehole + reclamation extent. We size HSR + PVD + staging same day from PJ HQ.