Project Overview
The My An – Cao Lanh Expressway Project (Dong Thap Province) spans approximately 26.6 km, serving as a vital national transport link along the western corridor of the Mekong Delta. The route traverses complex geological formations characterized by thick layers of soft alluvial soil, low bearing capacity, and prolonged consolidation settlement. Implementing advanced subgrade stabilization measures is crucial to ensure overall structural stability, control post-construction settlement, and extend the service life of the expressway.
Application of An Thai Fiber Geosynthetic Solutions
To meet the rigorous technical specifications of the project, An Thai Fiber supplied a comprehensive system of geosynthetic materials optimized for specific structural functions:
1. Prefabricated Vertical Drains (PVD) & Prefabricated Horizontal Drains (PHD)
Vertical Drainage (PVD): Installed deep into the compressible soil layer to shorten drainage paths, accelerate pore-water dissipation, and expedite subgrade soil consolidation.
Horizontal Drainage (PHD): Acts as a horizontal drainage channel, collecting discharge water from vertical drains and channeling it outside the embankment footprint under surcharge preloading pressure.
Engineering Evaluation: The PVD/PHD system combined with preloading typically requires significant surcharge embankment heights (3–5 m). Amid natural sand shortages, An Thai Fiber’s high-efficiency drainage system optimizes flow capacity and significantly reduces preloading duration, easing project schedule constraints.
2. High-Tensile Woven Polyester (PET) Geotextiles
Subgrade Reinforcement: Functioning as a high-tensile basal reinforcement layer at the embankment foundation, resisting lateral displacement and preventing deep-seated rotational shear failure.
Load Distribution: Uniformly distributes embankment structural stresses onto the underlying foundation soil or pile caps, minimizing differential settlement.
Structural Enhancement: Enhances the overall bearing capacity and long-term mechanical stability of the roadway embankment.
3. An Thai Fiber Non-Woven Geotextiles
Subgrade Separation: Functions as a separation barrier between soft subgrade soil and the initial sand fill layer, preserving structural integrity during early-stage filling.
Pavement Structure Separation: Separates the embankment sand core from the aggregate base/subbase course, preventing intermixing of dissimilar materials that could degrade load-carrying capacity.
Filtration Layer: Operates as a technical reverse filter, permitting free pore-water flow while retaining fine soil particles, preventing internal erosion and piping.
An Thai Fiber Manufacturing Plant
An Thai Fiber is a leading manufacturer of high-quality synthetic fibers and geosynthetics in Vietnam. All vertical/horizontal prefabricated drains, high-tensile woven geotextiles, and non-woven geotextiles supplied to the My An – Cao Lanh Expressway Project undergo strict quality assurance and control processes, fully complying with international engineering standards (ISO, ASTM) and national transportation specifications.
