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Weak Soil Stabilization |
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Due to the unique features of stiff monolithic geogrids, soil reinforcement as a method to address the soil stabilisation issues has been adopted worldwide.
The function of biaxial monolithic geogrids, where the junctions are executed monolithically and without gluing, stitching or knitting has long since been recognized. The biaxial geogrids have been successfully applied in thousands of construction projects for addressing a wide range of geotechnical issues and several hundreds of millions of square meters of geogrids have been successfully applied worldwide, in all climates and in all types of specific soil conditions. This success is the result of the unique efficiency in the soil (the so-called ‘interlock mechanism’), of the comprehensive research conducted in numerous universities and institutes worldwide and of proven references on geotechnical applications over the past two decades.
There are several applications of stiff geogrids in the soil stabilisation. Each of them includes significant advantages that often result in reduced costs:
1. Reducing layer thickness – reduction of the thickness of fill layer on the geogrid up to 40% (depending on the bearing capacity of foundation soil).
2. Extended lifespan - road rehabilitation, especially if the reconstruction includes the courses down to the road structure – is a major expense for investors. Expert analyses show that when the soil is mechanically stabilized with geogrids, the service life of the pavement is significantly extended (there is evidence that the rehabilitated pavement can take three times more axial passages for the same deformation). This results in savings in annual road maintenance budgets.
3. Increased bearing capacity – sometimes working platforms for large loads need to be executed on a soil of poor bearing capacity. The load spreading capability of geogrids increases the bearing capacity of working platforms.
4. Controlling differential settlement - the stiffness of the base contributes to reduction of both differential and total settlement, as due to the interlock mechanism the active force is spread over a larger surface, resulting in lower loads and therefore lower total settlement.
5. Weak soil coverage - geogrids enable safe construction and compacting of embankments on weak soil.
The use of stiff monolithic geogrids for weak soil stabilization results both in increased bearing capacity on the surface and longer service life due to the interlock mechanism, which provides for better load distribution to lower courses. In addition, the application of geogrids contributes to obtaining required bearing capacity with smaller layer thickness, which results in savings in the use of expensive or scarce materials. |
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Technical guidelines (PDF)
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STIFF MONOLYTHIC GEOGRIDS
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Due to the unique features of stiff monolithic geogrids for soil reinforcement, this method to address the soil stabilisation issues has been adopted worldwide.
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