Shahrokh Bagli
Shahrokh Bagli, Chief Technology Officer Strata Geosystems (India) Pvt. Ltd.
Roads are essential for the economic growth of the country, and unlike the railway network, various classes of roads-from expressways to rural road, assure last mile connectivity. India’s growing economy requires expansion of existing carriageways into multi-lane expressways, new road routes and development of rural roads for motorised vehicles instead of animal-drawn carts. However, difficult subsoil conditions, high economic and social cost of diversions, dearth of good construction material and environmental constraints pose major challenges for road development.

Scarcity of good material often requires flexible pavements to be constructed from marginal materials. Pavements supported on weak soils with low California Bearing Ratio (CBR) would require further engineering beyond the established standardised norms. There are instances where marginal material is required to be used even where the CBR is very low. Such conditions require a paradigm change in the design of the pavement section using geosynthetics.

Geocell to the rescue

At Strata Geosystems, we have used geosynthetics like geocells (StrataWeb®) and geogrid (StrataGrid™) for ground improvement, reinforced soil walls, embankment protection etc. We rehabilitated a damaged stretch of a National Highway NH-44 connecting the North-Eastern states with the rest of the country. It became operational in a record time of 15 days and was acknowledged by the Assam PW (Buildings and NH) Department in the following words: “The NH-44 at Churaibari once infamous for mud and slush is now transformed beautifully, and this has been made possible by the use of Geocell in its construction.”

Strata

NH-44 near the Assam-Tripura border traverses forested undulating terrain. The sub-grade is highly plastic, with weak, clayey soil of low permeability. This region experienced very heavy rainfall from March to September 2016 and completely damaged about 500m of the stretch, reducing it to a swamp (Fig.1). Conventional repairs were unsuccessful and traffic disruption created a crisis with commodities becoming scarce and expensive in Tripura.

Strata Geosystems designed the pavement using StrataWeb® geocells within the pavement section (Fig. 2). The CBR was as low as 0.5% and the traffic intensity considered was 20msa. A Modulus Improvement Factor (MIF) of 2 was conservatively considered. Granular material was available within reasonable lead and used as infill, ensuring drainage of ingressed water.

The pavement section was completed up to the granular base by August 15, 2016 in a record 15 days. Traffic was allowed to ply immediately over the granular base component because of the following reasons:
  • The social crisis did not merit any further delay of normal traffic flow
  • It was not prudent to lay the top bitumen components during the continuous rainfall
  • The work was done under trying conditions and behaviour of the road left unpaved was monitored for a short period.
Strata

The procedure proved successful. Fig. 3 illustrates heavy vehicular traffic plying the unpaved pavement without distress, notwithstanding the wet conditions. After being paved, the stretch has further withstood the heavy brunt of the 2017 monsoons (Fig. 4).

Geosynthetics are an important facet of geotechnical engineering. Geocells can be utilised for rapid construction of emergency roads as well as roads over difficult subgrades and terrain even where the CBR value of the subgrade may be as low as 1%. Where life cycle costs are concerned, earth structures and pavements with geosynthetic reinforcement score well over conventional designs.
Click Here
To Know More or to Contact the Manufacturer
Please let us know your name.
Invalid Input
Please let us know your Designation.
Please let us know your Contact Number.
Please let us know your email address.
Please brief your query.
Our other Value-Added Services:

To receive updates through e-mail on Products, New Technologies & Equipment, please select the Product Category(s) you are interested in and click 'Submit'. This will help you save time plus you will get the best price quotations from many manufacturers, which you can then evaluate and negotiate.

Invalid Input
Invalid Input
Invalid Input
There are many challenges being faced by the highway sector such as ensuring availability of construction materials and machinery, timely completion of projects, availability of trained human resources

Read more ...

Practical Recommendations for Construction of Longitudinal Joints in Hot Mix Asphalt (HMA) Pavements Rajib B. Mallick, Ralph White Family Distinguished Professor, Civil and Environmental Engineering, Worcester Polytechnic Institute (WPI), Massachusetts, USA, and Veeraragavan

Read more ...

Plant and Equipment Determine Quality of Road Construction Road Infrastructure projects are time constrained; early completion of project entitles rewards while delays attract penalties. The plants and equipment being used determines the quality of the road

Read more ...

New Road Technologies & Smart Roads The exponential increase in the number of vehicles on roads has led to multiple traffic problems and associated risks, traffic congestions, etc., yet the roads, despite being arteries of modern

Read more ...

Designing roads and highways efficiently with the right materials will help achieve optimum construction cost, lower maintenance, and reduce life cycle costs. Ash from coal-fired thermal power

Read more ...

Rodic Consultants has emerged as a leader in the infrastructure consulting space with state-of-the-art engineering solutions, and a proven track record of timely completion of projects across sectors

Read more ...

Readymade Kandhal Pothole Patching Mix was adopted as Indian Roads Congress (IRC) Standard Specification IRC: 116-2014 for Readymade Bituminous Pothole Patching Mix Using Cut-Back Bitumen. All concerned

Read more ...

The Bundelkhand Expressway is a 296-km long, 4-lane wide (expandable to 6 lanes) access-controlled expressway in the state of Uttar Pradesh. It will connect Gonda village in Chitrakoot district with Agra–Lucknow

Read more ...

This case study briefly discusses the planning, design and construction of Package 3 of the Purvanchal Expressway. Package-3 of the Purvanchal Expressway is a 41.7km long section of the 340.82km long

Read more ...

Since the 1980’s billions of dollars have been invested in developing methods to make pavement design and construction more sustainable through the re-use of existing resources. This includes insitu recycling and

Read more ...

India has the second largest road network in the world, spanning a total of 5.89 million km, transporting 64.5% of all goods in the country. Nearly 90% of India's total passenger traffic uses the road network to commute

Read more ...

India generates nearly 26,000 tonnes of plastic waste every day, making it the 15th biggest plastic polluter globally. Discarded plastic waste litter the country’s roads, rivers and also form huge mounds in garbage

Read more ...

According to Vipula Sharma, Director – Ratings, Brickwork Ratings, with the recent tweaking in the HAM model, the share of the projects awarded under HAM model is expected to increase. “Overall, there should be a

Read more ...

After creating a world record for laying Pavement Quality Concrete (PQC) for a four-lane highway of 2,580 meters length within 24 hours, NHAI has made yet another record by completing a single lane of the four-lane

Read more ...

Ashoka Buildcon, a leading highway player in India, has an impressive portfolio of 39 PPP projects, which is the largest in number in the country. With 40 years of experience in the core business of Highway Construction

Read more ...

Patel Infrastructure, an established construction, development, and maintenance service company and a NHAI contractor, has created a world record in the Infrastructure sector by laying Pavement Quality Concrete (PQC) for

Read more ...

Macro synthetic polymeric fibres have the potential to enhance the post cracking properties of hardened cement-based materials, besides bringing improvements in other properties such as durability. This article disseminates

Read more ...

High altitude areas which are subjected to heavy snowfall and frost action necessitate special consideration for design and construction of pavements. U.K.Guruvittal, Chief Scientist & Dr G Bharath, Scientist, CSIR-Central

Read more ...

Flexible pavements are the most common type of pavement systems in the country. In addition to being convenient to construct, they are also cost-effective and easy to maintain. These pavements constitute the surface

Read more ...

Roller Compacted Concrete is an innovative technology gaining popularity in the recent past due to some of the positive points like low cost of construction, speed in construction, and the possibility of using mineral

Read more ...

×
Sign-up for Free Subscription
'India Construction Week'
Weekly e-Newsletter on Construction Industry
Get the latest news, product launches, projects announced / awarded, government policies, investments, and expert views.