Kolhapur, Maharashtra, India | PMGSY, Maharashtra Rural Road Development Association (MRRDA) Kolhapur
Road from SH to Kandalgaon Road ODR- 90Km 0/000 to 4/300, Tal-Karveer passes through rich black cotton soil having a very low CBR value and erosion occurred due to cross-drain & pond. The road was subjected to heavy vehicular traffic intensity because of State Highway and was also surrounded by the irrigable land on both sides. With the onset of monsoon the road got heavily water logged and due to the existence of the black cotton soil and high traffic intensity certain stretches of road got heavily distressed with significant settlement, unevenness & fatigue cracks.
Black cotton soil contains montmorillonite mineral, because of which the soil becomes very slushy when in contact with water and gets brittle on drying. These alternate cycles of wetting and drying makes the highly unsuitable for any type of construction. Flexible pavement designed over this type of soil requires very high crust thickness, which makes it uneconomical.
TechFab (India) Industries Ltd suggested the use of TFI – 5300 Type-I for the sub grade stabilization of the existing road stretches comprising of black cotton soil, high traffic intensity & water logging.
TFI – 5300 Type-I are polypropylene woven geotextiles with slit-film (tape) yarns in the warp and fibrillated tape yarns in the weft direction. These engineered geotextiles are stabilized to resist degradation due to ultraviolet exposure and are resistant to commonly encountered to commonly encountered soil chemicals, mildew & insects, & are non-biodegradable. Road has been left for traffic after completion of WBM. There is no settlement seen from last one month.
The road passed through black cotton soil with very low CBR value, making it highly unstable under waterlogged conditions. Heavy traffic intensity and monsoon rains caused settlement, unevenness, and fatigue cracks, necessitating stabilization.
Black cotton soil with montmorillonite mineral, which becomes slushy when wet and brittle when dry.
Alternate cycles of wetting and drying leading to pavement distress.
Requirement of very thick pavement crusts, making conventional designs uneconomical.
Heavy vehicular traffic and waterlogging from cross-drains and ponds.
TechFab India proposed TFI–5300 Type-I woven geotextile for subgrade stabilization:
Polypropylene woven geotextile with slit-film yarns in warp and fibrillated tape yarns in weft.
UV stabilized and resistant to soil chemicals, mildew, and insects.
Non-biodegradable, ensuring long-term durability.
Installed beneath the pavement layers to improve stability and reduce settlement.
Provides reinforcement and separation between weak soil and aggregates.
Enhances load distribution, reducing rutting and deformation.
Prevents mixing of soil and aggregates, maintaining pavement integrity.
Reduces requirement of thick pavement crust, making construction cost-effective.
Road was opened to traffic after completion of WBM.
No settlement observed for over a month post-construction.
Improved durability and performance under heavy traffic and monsoon conditions.
Client satisfaction with stabilization results and material quality.
TFI–5300 Type-I Woven Geotextile
TechFab Metal Gabion (for drainage/structural support where required)
TechGeo PP Nonwoven Geotextile (for filtration and separation functions)
