--- title: "The Role of Geosynthetics in Bharatmala Pariyojana Highway Projects" date: 2026-07-19 author: "Sales Team" url: https://oceangeosynthetics.com/geosynthetics-in-bharatmala-pariyojana/ --- July 19, 2026 | [Geosynthetics](https://oceangeosynthetics.com/category/geosynthetics/) # The Role of Geosynthetics in Bharatmala Pariyojana Highway Projects India is building highways at a pace the country has never seen before, and beneath almost every kilometre of that new road lies a quiet layer of engineering that most travellers never notice. Geosynthetics, the family of engineered fabrics, grids and cells that reinforce and protect the ground, have become one of the unsung heroes of the Bharatmala Pariyojana. As the programme pushes national corridors across soft deltas, black-cotton soils, flood plains and hill slopes, geosynthetics are what allow those roads to be built faster, last longer, and cost less over their lifetime. This article looks at how geogrids, geotextiles and geocells fit into Bharatmala, and why the right geosynthetic partner matters. ## Table of Contents ## What Is Bharatmala Pariyojana? Bharatmala Pariyojana is the Government of India’s flagship highway development programme, launched in 2017 to build a modern, connected national road network. Its first phase alone targets around 34,800 kilometres of highways, and the wider vision covers well over 65,000 kilometres of economic corridors, feeder routes and expressways designed to move freight and people more efficiently across the country. The programme is deliberately data-driven, prioritising routes that carry the most goods and connect the most people, rather than simply widening what already exists. By early 2025, more than 20,378 kilometres had been completed, with construction continuing across every region of India. That scale is exactly why material and design choices matter so much. When you are building tens of thousands of kilometres across wildly different soils and climates, small improvements in how the ground is treated add up to enormous savings in money, time and carbon. ## Phases and Components at a Glance Bharatmala is structured around several corridor types rather than simple stages. Economic corridors form the backbone, carrying the heaviest freight movements. Inter-corridor and feeder routes stitch the network together so goods can move between the main arteries. National corridor efficiency improvements decongest existing highways, while border and international connectivity roads, coastal and port connectivity roads, and greenfield expressways complete the picture. Each of these road types crosses difficult terrain at some point, and each throws up ground conditions that conventional construction struggles to handle economically. This is where geosynthetics earn their place. ## Why Geosynthetics Matter for Highway Construction in India The core problem in Indian highway construction is that good ground is rare and good aggregate is expensive. Vast stretches of the country sit on weak, compressible or expansive soils that cannot support a heavy pavement without help. The traditional fix, excavating and importing thick layers of granular material, is slow, costly and environmentally heavy. Geosynthetics offer a smarter route. By reinforcing, separating, filtering, draining or confining the soil, they let engineers build stronger road sections with thinner layers and less imported material. Indian design practice has fully embraced this. The Indian Roads Congress guideline IRC:SP:59, “Guidelines for Use of Geosynthetics in Road Pavements and Associated Works,” along with IRC:113 for reinforced embankments on soft soils and the MoRTH Specifications for Road and Bridge Works, all provide the framework for using these materials. International bodies including the International Geosynthetics Society (IGS), the Geosynthetic Institute (GSI), the FHWA and ASTM supply the test standards that give engineers confidence in the products. For anyone involved in soil stabilization in road construction, this is now mainstream engineering, not an experiment. ## Geogrids for Subgrade Stabilization and Base Reinforcement A geogrid is a polymer grid with apertures sized to interlock with aggregate particles. When placed at the subgrade or within the granular base, it grips the stone and stops it spreading sideways under traffic, a mechanism engineers call lateral restraint. The result is a stiffer, stronger road platform that distributes wheel loads over a wider area and resists rutting. For Bharatmala corridors crossing weak subgrades, a geogrid for road construction delivers two headline benefits. It raises the effective bearing capacity of poor ground, and it allows a genuine reduction in aggregate thickness for the same design life, which IRC:SP:59 recognises through the concept of layer-coefficient improvement. On a project measured in thousands of kilometres, cutting even a modest depth of imported stone per kilometre translates into a vast saving in quarrying, haulage and cost. Geogrid tensile performance is verified to standards such as ASTM D6637, giving designers a dependable input for pavement design. ## Geotextiles for Separation and Filtration If geogrids do the reinforcing, geotextiles do the housekeeping, and it is work that quietly decides whether a road survives its design life. A geotextile placed between the subgrade and the granular layer acts as a separator, stopping soft subgrade soil from pumping up into the expensive aggregate and stopping the aggregate from punching down into the mud. Without that separation, the two layers intermix, the base loses strength, and the pavement fails prematurely. The same fabric also performs filtration and drainage. It lets water pass through while holding soil particles back, relieving the pore-water pressure that weakens a subgrade and undermines a shoulder. For the geotextile in highway construction India relies on across its flood plains and high-rainfall corridors, this combination of separation and drainage is essential. Non-woven and woven geotextiles are specified by their opening size to ASTM D4751, their permittivity to ASTM D4491 and their tensile strength to ASTM D4632 and D4595, with IRC and BIS guidance governing their selection. ## Geocells for Slope Protection and Erosion Control Highway embankments, cut slopes and channel banks are constantly attacked by rain and runoff, and unprotected slopes erode, gully and eventually slump onto the carriageway. A geocell, the three-dimensional honeycomb of welded HDPE strips, solves this by cellular confinement. Filled with soil, aggregate or concrete and pinned to the slope, it locks the surface material in place, holds vegetation, and spreads any load across a wide flexible mattress. On Bharatmala projects, geocells are used for slope protection on high embankments, for the green armouring of cut faces, and for channel and drain lining. They keep slopes stable through the monsoon, cut long-term maintenance, and support the erosion control that a durable highway corridor demands. Because the confined layer behaves as a semi-rigid mattress, geocells also serve as load-support platforms over very weak ground, extending the same confinement principle from the slope to the road base. ## Geosynthetic Product Comparison The table below summarises where each product fits in a highway cross-section, and why an engineer would specify it. | Product | Primary Function | Where Used in a Highway | Key Benefit | Reference Standards | | --- | --- | --- | --- | --- | | Geogrid | Reinforcement / lateral restraint | Subgrade and granular base | Higher bearing capacity, reduced aggregate thickness, rut resistance | IRC:SP:59, ASTM D6637 | | Woven Geotextile | Separation and reinforcement | Subgrade / base interface, embankment base | Prevents layer intermixing, adds tensile support | IRC:SP:59, ASTM D4595, D4632 | | Non-woven Geotextile | Filtration and drainage | Drains, shoulders, subsurface drainage | Relieves pore pressure, retains soil, protects layers | ASTM D4751, D4491, D4355 | | Geocell | Confinement | Embankment and cut slopes, weak base | Slope stability, erosion control, load support | IRC:SP:59, ASTM D5397 | | Geocomposite Drain | Drainage | Behind retaining walls, edge drains | Rapid water removal, thinner drainage layers | ASTM D4716 | ## Application Case Studies The value of geosynthetics is easiest to see through the situations they solve. On corridors crossing soft alluvial or black-cotton soil, a layer of geogrid over the prepared subgrade has repeatedly turned an unbuildable platform into a firm working surface within days, letting construction proceed on schedule while cutting the depth of imported granular fill. On embankments raised over compressible ground, high-strength woven geotextiles and geogrids at the base spread the load and control settlement, allowing steeper, safer embankments to be built with less land acquisition. Along drainage-heavy stretches and river crossings, non-woven geotextile separators and filters have preserved base strength and kept subsurface drains flowing, protecting the pavement from the water damage that shortens road life in high-rainfall regions. And on the tall embankments and cut slopes that greenfield expressways demand, geocell confinement has held slope faces through successive monsoons, supporting vegetation and sharply reducing the erosion repair that would otherwise recur every year. These are the everyday scenarios that repeat across the Bharatmala network, and in each one the right geosynthetic converts a costly, slow, failure-prone problem into a fast and durable solution. ## Why Ocean Non Wovens for Bharatmala Projects Delivering geosynthetics at the scale Bharatmala demands calls for a manufacturer who can combine engineering quality with dependable supply, and that is exactly where Ocean Non Wovens fits. As a leading Indian manufacturer and supplier of geogrids, woven and non-woven geotextiles, geocells, HDPE liners and geobags, Ocean Non Wovens produces materials tested to Indian and international specifications and delivered on the timelines that large highway packages require. Ocean Non Wovens supports highway and expressway construction, embankment and slope stabilisation, drainage and erosion control, along with defence infrastructure, airports, railways, water resources and industrial developments across India. For contractors and consultants working on Bharatmala corridors, that means a single, reliable source for the full range of geosynthetics a modern highway needs, backed by technical support to help specify the right product for each ground condition. If your project involves soil stabilization in road construction, subgrade reinforcement, separation, drainage or slope protection, Ocean Non Wovens can help you build stronger roads that last longer and cost less over their life. Talk to Ocean Non Wovens and put engineered ground beneath India’s next great highway. 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