Slowly but surely, specification by performance is becoming a more accepted method for construction by highways agencies both internationally and in the UK. The results promise much-needed innovation and significant economic and environmental benefits.
Tensar International is a worldwide leader in the manufacture and provision of soil reinforcement and ground stabilisation solutions. Our expertise and experience has been accumulated over several decades of successful collaboration in international project design and implementation. Supported by our team of qualified civil engineers, we offer proven, practical and best value answers to an extensive range of requirements.
Tensar geogrids: practical ground stabilisation solutions
Tensar Technology provides proven practical solutions and the know-how to get them built. Based on the unique properties of Tensar geogrids, Tensar Technology is widely adopted for ground stabilisation and soil reinforcement problems, delivering real savings in both cost and time. We can help you apply Tensar Technology to deliver the best value on your project.
Railway track ballast reinforcement
Expensive, disruptive and frequent maintenance is often required on railway track that overlies a soft subgrade due to the problem of settlement. Because of this, a simple and economical method of reinforcing track ballast is required.
Tensar geogrids provide an extremely cost-effective solution for the reinforcement of ballast over a soft subgrade bringing significant benefits to the railway engineer.
Tensar has extensive experience in upgrading European railway corridors. This has resulted in innovative and cost-effective solutions in railway engineering.
Reducing ballast settlement over soft subgrades
Independent research has confirmed that Tensar geogrids are an effective way of reducing the rate of ballast settlement over soft subgrades. An extensive, full-scale, independent research programme was carried out by British Rail and clearly demonstrated it:
- Tensar geogrids can help extend maintenance intervals by minimising settlement
- When using Tensar geogrids in ballast, the rate of settlement approaches that of track on a firm foundation
- The Tensar geogrid has a stiffening effect and will reduce the elastic deflections
- Unreinforced track will experience more rapid settlement and will require additional maintenance
- The use of grids with high-profile ribs can limit the lateral creep of ballast particles, reducing settlement and, therefore, the rate of deterioration of the vertical track geometry
Railway applications of Tensar geogrids
There are two major application areas for the use of Tensar geogrids – within and beneath railway track ballast:
- Direct ballast reinforcement to reduce the rate of track settlement and hence reduce maintenance cycle frequency
- Reinforcement of a granular sub-base layer beneath the railway ballast to increase the bearing capacity of the track foundation
Other benefits of the Tensar geogrid solution include:
- An alternative to increasing depth of ballast, or chemical stabilisation
- Reduction of the rate of permanent settlement
- Improved rail ballast performance allows consistent high speeds to be achieved
- Avoids excavation and replacement with thick layers of imported fill
Tensar TriAx – a revolution in geogrid technology
Tensar International has almost 30 years of experience in analysing and optimising the performance of geogrids. Drawing on this technical knowledge and expertise, Tensar has radically re-engineered the fundamental structure of geogrids to create a revolutionary new product. The TriAx geogrid is the culmination of this research and represents the future of geogrid technology, using one of the most stable forms – the triangular structure.
The unique TriAx structure incorporates several characteristics which combine to create an optimised structure that outperforms conventional biaxial geogrids in trafficking applications. When combined with a suitable aggregate TriAx produces a mechanically stabilised layer with exceptional performance.
Tensar International has announced the completion of its acquisition of Mulch and Seed Innovations. The combination of Tensar International and MSI supplements an industry-leading portfolio in soil reinforcement, stabilisation and, now, hydraulic erosion control and vegetation establish
Tensar International to Assume CONTECH Construction Products’ Distribution Business for Tensar® Biaxial and TriAx® Geogrid Products
After 25 years of successful collaboration, Tensar International and CONTECH Construction Products have mutually agreed that Tensar will take on distribution responsibility for geogrid products in the US. Under the terms of the agreement and effective 2 May 2011, Tensar International wi
Tensar International Corporation's innovative TriAx™ geogrid, and the technical developments it represents, has won one of civil engineering’s most prestigious awards, from the International Geosynthetics Society. Tim Oliver, Tensar International vice president marketing, explains
Tensar International’s newly developed RE500 series of uniaxial geogrids have been awarded British Board of Agrément certificates 99/R109/1, 99/R109/2 and 99/R113/1 for roads, bridge abutments, retaining walls, slopes and embankments in UK highway construction. RE500 uniaxial geogrids show
Prominent landscape features for Nottingham's new high-sustainability Castle College Technology Park and Number 1 Science and Technology Park are the surrounding green embankments. By using a Tensartech earth-retaining solution from Tensar International, construction company Morgan Ashurst wa
A call for industry and universities to drive forward key opportunities for research into polymer geogrid applications has been made following a successful symposium to mark 25 years of technological advancement in the field. More than 150 people attended the Jubilee Symposium on Pol
Vegetated embankments and steep slopes are favoured methods of construction for infrastructure projects, including roads, bridges and railways. Tensar International's Tensartech NaturalGreen and GreenSlope systems, for reinforced earth retaining slopes up to 45° and 70° respectiv
A year since its launch, Tensar International’s innovative TriAx geogrid has won a hat trick of awards. Adding to its UK triumph at Civils 2007, where it was awarded the prestigious accolade of ‘Product of the Year’, TriAx has now scooped two further European wins just six month
Tensar International has won the prestigious Civils 2007 'Product of the Year' award with its innovative new TriAx at Civils 2007 (20-22 November, Earls Court 2, London). Unlike conventional geogrids – comprising square or rectangular apetures – TriAx has a unique triangular stru
Tensar International, the global market leader in the supply and manufacture of geogrid solutions for soil reinforcement and ground stabilisation, has announced the launch of TriAx geogrid - the most significant advance in ground stablisation technology for 25 years. Tensar, the o
The International Symposium on The Technologies for Improving the Performance of Rail Tracks was held December 13th and 14th in Prague, Czech Republic. The symposium was organised by Tensar International s.r.o. in cooperation with Czech Railway Infrastructure Administration and in conjunction wit
On an 8km section of the railway between Èortanovci and Petrovaradin, in Serbia, Tensar International's geogrid technology enabled essential track reconstruction by Serbian Railways to be completed over low load bearing capacity ground. As well as saving 30% in fill-material costs compared to con
A new Pendolino train was successfully tested by Czech Railways at up to 237km/h (147mph) on a trackbed with the sub-grade stabilised by Tensar bi-axial geogrids, and laid over soft ground with low bearing capacity. Although the normal maximum speed for the Czech Railways is 160km/h, in November
Tensar International reveals new data proving the ballast reinforcing benefits of its stiff polymer geogrids at RailTex 2007. The recent research conducted by Nottingham University and Network Rail examined the influence of different grid properties, such as stiffness and aperture siz