Technical Geosynthetic
ABOUT LANDFILL ENGINEERING
Landfill base lining systems provide permanent protection of soils and groundwater from the pollutants in a waste mass. Lining system requirements are often specified in national regulations and geosynthetics have become common components of these systems.
BENTOFIX ® is often considered for Landfill base lining systems where project sites are compact, groundwater protection is sensitive, and a thinner mineral sealing layer is preferred over traditional compacted clay. In a Landfill built on reclaimed or low-lying coastal ground, BENTOFIX ® can be installed below or together with an HDPE geomembrane to create a composite barrier, helping Landfill base lining systems control leachate migration while supporting faster installation and more consistent material quality.
For new waste cells, extensions, or upgrade works at an existing Landfill, the key is to use BENTOFIX ® where proper subgrade preparation, overlap detailing, hydration control, and puncture protection can be maintained. Landfill base lining systems in Hong Kong and Macau are showing very high standards against settlement risk, side-slope stability, heavy rainfall during installation, and compatibility with drainage layers; in these conditions, BENTOFIX ® supports Landfill base lining systems as a practical geosynthetic clay liner for long-term Landfill containment.
ABOUT GEOGRIDS
Geogrids are polymeric products formed by joining intersecting ribs. They have large open spaces also known as "apertures". The directions of the ribs are referred to as machine direction (md), orientated in the direction of the manufacturing process or cross ma chine direction (cmd) perpendicular to the machine direction ribs. Geogrids are mainly made from polymeric materials, typically polypropylene (PP), high density polyethylene (HDPE) and polyester (PET).
Among these options, SECUGRID ® Geogrid is highly effective for soil reinforcement in demanding landscape challenging slope stabilization and retaining wall projects. When constructing steep reinforced soil slopes in areas with aggressive, acidic soils or high chemical exposure, using a high density polyethylene (HDPE) geogrid ensures long-term chemical resistance and structural integrity. Engineers should specify SECUGRID ® Geogrid in these high-stress environments because its rigid, flat bars provide excellent junction strength and immediate interlocking with backfill materials, making it ideal for stabilizing steep earth retaining walls.
For coastal reclamation and port infrastructure projects in Macau and Hong Kong, where foundations are often built over soft marine clay, SECUGRID ® Geogrid is crucial for subbase stabilization. Deploying this high density polyethylene (HDPE) geogrid at the subgrade level distributes heavy traffic and construction loads more evenly, preventing differential settlement over time. To maximize performance, SECUGRID ® Geogrid made of high density polyethylene (HDPE), polypropylene (PP) or polyester (PET) should be installed directly over a separation geotextile in waterlogged areas, ensuring the aperture structure remains clear to lock aggregate particles firmly in place.
For water ponds or other soft grounds foundation layers, a SECUGRID ® Geogrid additionally embeds a SECUTEX® non-woven geotextile within the stretched bars to form a Combigrid® which provides reinforcement stabilization, filtration, separation and drainage in a single product.
ABOUT SOFT ROCK
Secutex® Soft Rock are geotextile sand-fi lled bags, containers, or tubes that are manufactured from needle-punched Secutex® filter nonwoven geotextiles. For coastal structures, dune security and scour protection, Secutex® Soft Rock provides an alternative to conventional rock materials such as riprap, gravel filters and other hard armour and aggregate solutions.
In coastal reclamation and marine works across Hong Kong and Macau, SECUTEX ® Soft Rock is highly effective for scour protection around bridge piers and seawalls where traditional rock armor is difficult to source or install. These specialized sand bags (also called “geobags” or “geocontainers”) utilize a robust and engineered geotextile design that conforms to irregular seabed profiles, providing immediate stability against strong tidal currents. Because SECUTEX ® Soft Rock containers are manufactured from needle-punched filter nonwoven geotextiles, they allow water to flow freely while retaining the sand fill, preventing the loss of fine sediments and ensuring long-term structural integrity in dynamic marine environments.
For river training and canalization projects in Hong Kong and Macau, engineers specify SECUTEX ® Soft Rock to construct flexible, vegetated retaining walls and riverbanks. Unlike rigid concrete structures, these sand bags encourage natural ecological growth while the underlying geotextile fabric protects the slope from erosion during heavy rainfall. When designing these systems, it is critical to use filter nonwoven geotextiles that offer high puncture resistance and permeability; this ensures that the sand bags remain stable under hydraulic pressure, making SECUTEX ® Soft Rock an environmentally friendly and durable alternative to conventional concrete lining. To achieve optimal filtration, the outer geotextile layer must be selected based on the surrounding soil grain size, utilizing high-quality filter nonwoven geotextiles to prevent clogging and maintain drainage efficiency.
ABOUT SECUTEX
Secutex® is a single-layered, mechanically bonded, non woven geotextile. Some products are additionally calendered. Secutex® is used for the separation of soil layers with different grain sizes as well as to establish the missing filter stability.
In large-scale coastal reclamation and artificial island projects in Hong Kong and Macau, SECUTEX ® Geotextile separation is critical when placing heavy rock armor or granular fill over soft marine clay. Utilizing a high-quality non-woven geotextile prevents the intermixing of distinct soil layers, maintaining the structural integrity of the reclamation platform. Engineers specify SECUTEX ® heavy-duty separation nonwovens in these marine environments because their high-water permeability and robust puncture resistance allow pore water to dissipate rapidly under surcharge loads while retaining fine soil particles. Implementing SECUTEX ® Geotextile separation during the initial reclamation phase ensures long-term stability and prevents differential settlement of the subgrade.
For slope stabilization and deep basement drainage systems across steep terrain, SECUTEX ® filter nonwovens are essential to prevent soil erosion behind retaining structures. When heavy rainfall occurs, a reliable non-woven geotextile must be placed between the natural soil and the drainage aggregate to prevent clogging of the drainage path. Using SECUTEX ® filter nonwovens ensures that water drains freely without carrying fine sediments, which reduces hydrostatic pressure on the retaining walls. In these applications, combining filtration with SECUTEX ® Geotextile separation ensures that the drainage layers remain clean and functional over the structure's lifespan. Ultimately, selecting the appropriate grade of this non-woven geotextile is vital for civil works in Hong Kong and Macau, where SECUTEX ® Geotextile separation guarantees that filtration and soil stabilization work in harmony.
FAQ
Understand more about Technical Geosynthetic products and their usage
1. What is Secutex® High Strength Technical Reinforcement Fabrics used for?
Secutex® is a single-layered, mechanically bonded, non-woven geotextile. Some products are additionally calendered. Secutex® is used for separation of soil layers with different grain sizes as well as to establish the missing filter stability. Besides, Secutex® also provides high strength technical reinforcement fabrics which are used in soil stabilization, soil reinforcement and concrete structures protection, etc. It is suitable for roadworks, retaining structures, drainage works, and other civil engineering applications.
2. Where is Secugrid ® geogrid commonly applied?
Secugrid ® geogrid is commonly used for soil reinforcement in embankments, slopes, earth retaining walls, and pavement subgrades. In Hong Kong, it helps to improve load distribution and reduce settlement.
3. What is Secutex® Soft Rock and Sand Bag used for?
Secutex ® Soft Rock and Sand Bag is used for erosion control, slope protection, and temporary or permanent ballast applications. It is practical for coastal and river works, hydraulic protection, and site stabilization in Hong Kong.
4. What is Combigrid ® geogrid designed for?
Combigrid ® geogrid is a geocomposite reinforcement solution to embed a Secutex® non-woven geotextile within the stretched high strength bars. It is primarily applied in highway sub‑base reinforcement, railway subgrade stabilization, bridge abutment backfill reinforcement, approach embankment support, retaining wall structural stabilization, and pavement crack control.
5. Why is Secutex ® High Strength Technical Reinforcement Fabrics important in Hong Kong?
Secutex ® high strength technical reinforcement fabrics is important because Hong Kong sites often involve weak soft ground, high rainfall, and limited construction areas. It helps to maintain performance in difficult site conditions.
6. How does Secugrid ® geogrid improve construction performance?
"Secugrid ® geogrid improves construction performance not only for slope reinforcement and earth retaining walls, but also plays a vital role in road subgrade stabilization and embankment reinforcement over soft ground, ensuring long-term structural stability."
7. When should contractors use Secutex ® Soft Rock and Sand Bag?
Contractors should use Secutex ® Soft Rock sand bag for coastal infrastructure, dune stabilization, and scour protection, it provides a geotechnical alternative to conventional hard armour solutions such as riprap, gravel filter systems, and other aggregate‑based protection methods.
8. How do these products work together in Hong Kong projects?
Secutex ® high strength technical reinforcement fabrics, Secugrid ® Geogrid, Secutex ® Soft Rock sand bag, and Combigrid ® Geogrid can be combined to solve different ground engineering needs. Together, they support separation, reinforcement, filtration, and protection in Hong Kong construction.
.png)
.png)