--- title: "Enhancing Infrastructure Stability: A Case Study on Ocean Geogrid-40 Kn Implementation in the Numaligarh Refinery Project" date: 2024-04-30 author: "Sales Team" url: https://oceangeosynthetics.com/ocean-geogrid-40-kn-implementation-in-the-numaligarh-refinery-project/ --- April 30, 2024 | [Case Studies](https://oceangeosynthetics.com/category/case-studies/) # Enhancing Infrastructure Stability: A Case Study on Ocean Geogrid-40 Kn Implementation in the Numaligarh Refinery Project Ocean Non Wovens supplied 4000 square metres of Ocean Geogrid-40 Kn for an expansion project at the Numaligarh Refinery in Assam, where the geogrid was used to reinforce soil and spread loads on ground of variable quality. ## Project overview Numaligarh Refinery, in Golaghat district of Assam, undertook a large expansion to raise its operating capacity and upgrade its infrastructure. The expansion aimed to improve production efficiency and make the refinery’s structures more resilient to the region’s environmental conditions, which include heavy monsoon rainfall on the Brahmaputra plains. ## Challenges The project faced challenges typical of refinery expansions: unstable soil, foundations that needed reinforcement, and the need for good drainage. Soil composition varied across the site, and exposed ground was susceptible to erosion. Heavy plant, cranes and construction traffic needed working platforms and roads that would not rut or settle on this ground. ## Solution The Ocean Non Wovens team proposed Ocean Geogrid-40 Kn, a [geogrid](https://oceangeosynthetics.com/products/geogrid-manufacturers/) designed for soil reinforcement, with a tensile strength of 40 Kn/m. The geogrid stabilises the soil, distributes loads and reduces the risks associated with ground movement. ### How a geogrid reinforces soil A geogrid is a polymer mesh with large apertures. When it is laid within compacted aggregate or fill, the stone particles lock into the apertures. That interlock restrains the aggregate from moving sideways under load, so the layer stays stiffer and spreads wheel and foundation loads over a wider area of the weaker soil below. The tensile strength of the grid, here 40 kN/m, is what resists that lateral spreading. Geogrid tensile strength is measured by the wide-width test of ASTM D6637 or ISO 10319. Typical uses at an industrial site like a refinery include reinforcing the granular base of internal roads and hardstands, working platforms for cranes and piling rigs, reinforced embankments and slopes, and load transfer platforms over soft ground. ## Implementation Work started with a site assessment and engineering analysis to decide where the geogrid should go and in what configuration. The Ocean Non Wovens team then worked with the project engineers to integrate the geogrid into the refinery’s works. Geogrid installation generally follows the same steps: prepare and grade the subgrade, roll out the geogrid in the specified direction, overlap adjacent rolls as the design requires, pin or hold the grid flat, then place and compact the fill on top without driving tracked plant directly on the exposed grid. ## Benefits - **Soil stability:** the geogrid improves the load-bearing performance of the reinforced layer and reduces settlement and subsidence risk. - **Structural integrity:** a reinforced base gives foundations and pavements a more uniform support. - **Drainage:** the open apertures of the grid do not block water, so the free-draining granular layer it reinforces continues to drain. - **Cost and time:** a geogrid can reduce the thickness of aggregate needed, or the depth of soft soil to be excavated and replaced, compared with unreinforced construction. ## Monitoring The geogrid’s performance was monitored and assessed through the project. ## About Ocean Non Wovens Ocean Non Wovens Pvt. Ltd. manufactures and supplies [geosynthetics](https://oceangeosynthetics.com/category/geosynthetics/), including geogrids, geotextiles and geocells, for industrial and infrastructure projects. See the [biaxial geogrid](https://oceangeosynthetics.com/products/geogrid-manufacturers/biaxial-geogrid/) range or more [case studies](https://oceangeosynthetics.com/case-studies/). 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The liner forms the barrier between stored waste… [See More](https://oceangeosynthetics.com/landfill-project-at-karnataka-case-study/) [![Use of Geotextile in Railway Project at Satara](https://oceangeosynthetics.com/wp-content/uploads/2023/06/Use-of-Geotextile-Railway-at-Project-at-Satara-300x169.png) *Use of Geotextile Railway at Project at Satara*](https://oceangeosynthetics.com/use-of-geotextile-in-railway-project-at-satara/) [Case Studies](https://oceangeosynthetics.com/category/case-studies/) [Ocean Geotextile for a Railway Project at Satara, Maharashtra](https://oceangeosynthetics.com/use-of-geotextile-in-railway-project-at-satara/) Introduction Ocean Non Wovens supplied 100,000 square metres of Ocean Geotextile for a railway project at Satara, Maharashtra. 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