Introduction
In many construction projects, the issue isn’t necessarily what you are building, but what you are building it on. Weak subgrades, slopes susceptible to erosion, and excessively heavy traffic loads can turn a seemingly properly designed project into a maintenance nightmare. And here’s where the geocell systems come into play.
A geocell, or cellular confinement system, is a three-dimensional honeycomb structure often constructed of high density polyethylene (HDPE) that is expanded and filled with soil, gravel or sand. Such a material functions to form a stable layer. The loads can be distributed across the cell structure and the material movement minimised. In other words, it confines, stabilises and protects. In many practical instances, it offers a ground engineering solution.
Key Explanation
In a broad sense, the main function of the inclusion of geocell in construction is that it seeks to improve the mechanical performance of weak or unstable ground. This is particularly the case when infill material is placed inside the geocell.
Such is the nature of the cell structure that it effectively becomes a small container; the lateral resistance essentially means it cannot simply spread. And because of this confinement:
- The load is distributed over a larger area
- The vertical deformation of that infill is limited
- The material has a higher shear strength
- A stabilized surface to a degree is promoted
Where a thicker aggregate layer may have been required with conventional methods, the confinement process offered by the geocell systems allows the engineer to reduce the amount of material yet provide the required performance levels.
Control of erosion is another of its functions. On slopes or channels they hold the soil in place and are protected from being washed away by water or blown away by the wind.
Applications / Use Cases
Applications of Geocells. The Geocells are used most, obviously enough, in the area of civil engineering works. Here are just some of the most familiar applications of the Geocells:
Base Stabilization. Particularly for road construction over soft subgrades. The Geocells create a reinforced base with, in turn, make the base rut resistant and increases the life span of the pavement.
Load Support Systems. For temporary, but also permanent access roads, circulated areas, and industrial yards and new developments. Geocells form a much cheaper alternative than a thick aggregate base.
Slope Protection. To hold back soil movement on hemmed up embankments and steep slopes; frequently, but not always, trained with grass.
Channel Protection. In drainage channels or banks along streams to create a nonerosive boundary to hold back the soil from moving away from the slipping effect of the current.
Retaining Structures. Creating a flexible wall by stacking Geocells and fill to hold back soil from a sloping effect. An alternative to a rigid wall of concrete.
Driveways or light load area. Securing Domestic Driveway or area from Sunken Loads. Keeping the top surface intact without holes at a low/ medium loaded area from pushing down into the subgrade to making voids .Condition. Such as, in a lot inclusion area of lots that exceeds the load-bearing capability. Spilling infostone with the lifting of Geocells. Letting the infill degrade should that wear out the Geocells. The void moves is the pouring lot starts sinking. Getting ‘blown’ and moves.
Comparison or Benefits
Comparison or advantages of Geocell: To that of regular Construction
Another favorable aspect of using the Geocell to that of regular construction is the lack of material and workforce. In that, it requires less building material since the cells receiving the weight compress at a lower impact; therefore, do not require a thick layer of load-bearing base.
“Inevitably, a Geocell system results in a more practical road construction technique that utilizes less material and reaps benefits such as longevity, adaptability, low-cost outlay and aesthetics of placement in any area of soft ground, slope, and area with high rainfall.”
Ease of Installation
Lightweight and easy to install with basic equipment, which facilitates speedier construction.
Environmental Factors
The reduced use of material, as well as the ability to use local fill, reduces environmental hassle. In slope applications, they also encourage natural vegetative growth.
Compared to geogrids or traditional methods of compaction, geocells provide true three-dimensional confinement, which is advantageous in weak soil conditions.
How to Choose / Buy
Choosing the right geocell would depend on your intended use.
Considerations
Cell Height
The taller the cell typically the better the confinement, and heavier load or steeper slope, it is designed for. The lower the height, the more light duty it shall be.
Type of Material
HDPE is common construction material for geocells as it’s flexible and durable. Check the specified material to make sure it meets the project’s requirements.
Perforated
Best to have a perforated geogcell for slope protection where drainage through is suitable, or where penetration of root systems should improve the vegetative cover. Choose a non perforated if holding water is the aim.
Welding
Ultrasonic welding is generally preferred, it’s a tighter joint with little voids.
Surface Texture
Some geocells have a texture added which improves friction between the cell wall and fill material. They’re designed to provide better stability.
Supplier Reliability
Go for a reliable manufacturer who shall be able to consistently supply the same units, second to that assess the firm’s ability to provide technical support for use of and orders for, clear specifications, compatibility with your preferred materials, delivery, and bulk pricing/ per square meter, especially for major projects.
FAQ
What is this?
Try asking yourself that. Geocell is a three dimensional geometric ‘honeycombed’ structure used to confine soil or aggregate, it’s an effective method for stabilizing the earth.
How does it work?
It restricts lateral movement of the fill present inside the cell, thus making it stronger, pressures are distributed thereon through the surface.
Cost or lifespan?
Varies with cell height, thickness, material quality, and so on as gotten from various suppliers. But it’s better by way of the costs than the other alternatives, even at the massive cost of installing, simply because it utilizes far less material. At a bare minimum you should get decades from it if installed of HDPE, estimate 10–20 more years, depending on other conditions of operation/maintenance.
What’s the best option?
There’s hardly a best one, but one sufficiently suitable for the requirements. Any construction related geocell type designer/installer would be required, factoring in the load upon it, soil, environmental conditions, etc. Some reliably textured, perforated HDPE products with a firm weld is generally, fine for most infrastructure.
A few typical problems?
Poor installations as well as insufficient compaction of fill around the cells. And laid with the wrong cell shall create a few problems too. You know the types, performance is affected so you’re going to need reliable help from the manufacturers, that’s for sure. And proper installation shall be observed.