How can geosynthetics enhance the sustainability and resilience of infrastructure projects?

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Geosynthetics are synthetic materials that are used to improve the performance and durability of soil and rock in civil engineering applications. They can provide various functions, such as reinforcement, drainage, filtration, separation, protection, and barrier. Geosynthetics can enhance the sustainability and resilience of infrastructure projects by reducing the environmental impact, increasing the service life, and improving the adaptability of the structures. In this article, you will learn about some of the benefits and challenges of using geosynthetics in different types of infrastructure projects, such as roads, railways, dams, landfills, and coastal protection.

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David Ohene Adjei Opoku

Civil Engineer | Researcher | Leader | Strategist
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Dave Woods

Technical Manager at HUESKER Group

1 Benefits of geosynthetics

Geosynthetics can offer several advantages for infrastructure projects, such as conserving natural resources and energy, reducing greenhouse gas emissions and waste generation, enhancing the strength and stability of the soil and rock, increasing the drainage and filtration capacity of the soil and rock, protecting the soil and rock from physical, chemical, and biological damage, and extending the service life of the infrastructure while decreasing maintenance costs.

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Geosynthetics, endorsed by AI and the LinkedIn community, elevate infrastructure sustainability. Benefits include enhanced soil stability, prolonged structure life, and reduced environmental impact. They bolster resilience by fortifying against disasters and curbing erosion. Challenges involve proper installation and ongoing monitoring. Geosynthetics are pivotal in road construction, retaining walls, and landfill liners, preventing erosion and reinforcing structures. Trends incorporate AI for real-time monitoring, while innovations focus on biodegradables and smart materials. Resources for learning include conferences and publications from entities like the International Geosynthetics Society.

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David Ohene Adjei Opoku

Civil Engineer | Researcher | Leader | Strategist
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Geosynthetics enhance sustainability by reducing the need for natural resources like sand and gravel, thus minimizing environmental impact. For example, in road construction, geogrids improve soil stabilization, allowing thinner layers of materials, cutting costs, and lowering carbon emissions. They also extend infrastructure lifespan by improving durability, such as in landfills where geomembranes protect against leachate contamination. Their lightweight nature leads to reduced transportation energy, further enhancing their sustainability in infrastructure projects like highways and landfills.

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2 Challenges of geosynthetics

Geosynthetics can present challenges when used in infrastructure projects, such as selecting the right type and design for specific site conditions and loading scenarios. Also, ensuring quality and durability during manufacturing, installation, and operation. As well as, assessing long-term performance under environmental and climatic factors, managing potential risks and liabilities associated with their use, and developing technical standards and regulations for their use in different countries and regions.

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David Ohene Adjei Opoku

Civil Engineer | Researcher | Leader | Strategist
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Despite their advantages, geosynthetics face challenges such as material degradation due to UV exposure or chemical interactions, which can reduce their effectiveness in long-term applications like coastal protection. Installation errors are another issue, as improper placement can lead to performance failures, such as in slope stabilization, where poorly installed geotextiles may not effectively prevent erosion. Addressing these challenges requires careful material selection and skilled labor for installation to ensure their long-term performance in demanding environments.

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Dave Woods

Technical Manager at HUESKER Group
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The number of different geosynthetics may appear daunting but with ISO controlled production and CE marking the and an understanding of what you want the material to achieve proper specifications can be made. The Declaration of Performance stamped on the packaging and summarised on the datasheets of all geosynthetics will tell you the base polymers, the durability and the applicable functions of each material (separation, filtration, reinforcement, drainage, barrier, protection, stress relief, erosion control, stabilisation) and give you the key design parameters such as strength, pore size, flow rate, permeability, puncture resistance, CBR etc. Independent BBA certificates or similar offer additional partial factors for reinforcement.

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3 Examples of geosynthetic applications

Geosynthetics can be used in various types of infrastructure projects, such as roads and railways, dams and reservoirs, landfills and waste management, and coastal and marine protection. For roads and railways, geosynthetics can improve the bearing capacity and deformation resistance of the subgrade and subbase layers, reduce the thickness and cost of the pavement layers, and prevent cracking and rutting. Additionally, they can provide drainage and filtration functions to prevent water infiltration and frost heave. In dams and reservoirs, geosynthetics can provide reinforcement and stabilization for the embankment and foundation, prevent seepage and piping through the core and base, as well as protect the upstream and downstream slopes from erosion and scour. For landfills and waste management, geosynthetics can provide separation and barrier functions to isolate the waste from the surrounding soil and groundwater, prevent leachate generation and migration, as well as collect and control gas emissions. In coastal and marine protection, geosynthetics can provide reinforcement and stabilization for shorelines and slopes to prevent erosion and scour by waves or currents. They also act as a barrier to protect habitats from damage by preventing saltwater intrusion or contamination.

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4 Trends and innovations in geosynthetics

Geosynthetics are continually evolving and innovating to meet the changing needs of infrastructure projects. For instance, new materials and products with enhanced properties and functions, such as biodegradable and smart geosynthetics, are being developed. Additionally, testing and monitoring methods for evaluating the performance and durability of geosynthetics are being improved. Furthermore, geosynthetics are being integrated with other technologies and systems to create hybrid energy solutions. Lastly, the applications and markets of geosynthetics are being expanded to new sectors, such as mining and agriculture.

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Dave Woods

Technical Manager at HUESKER Group
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On HS2 C1 a 100m stretch of the main route under a road bridge at Tile House Lane cutting geogrid reinforcement incorporating fibre optic cables at 0.5m centres was installed to provide an early warning system and against sink holes. The chalk cutting exposed numerous dissolution features which threatened the bridge structure if one of the vehicles carrying the 400T Colne valley deck segments were to topple. By monitoring microstrains in the fibre optic cables in real time the sensorgrid would provide advanced warning of movement at milimetric scales if a sinkhole does open up whilst the high strength grid will temporarily span any void preventing catastrophic failure.

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5 Resources for learning more about geosynthetics

If you are interested in learning more about geosynthetics, there are several resources available. The International Geosynthetics Society (IGS) is a professional organization that promotes knowledge on geosynthetics, and offers journals, books, newsletters, webinars, conferences, workshops, and courses. The Geosynthetic Institute (GSI) is a research and education center that provides research, testing, certification and training on geosynthetics. Additionally, the Geosynthetica website provides news, articles, videos, podcasts and events about topics such as design, installation, performance, innovation and regulation of geosynthetics.

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6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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How can geosynthetics enhance the sustainability and resilience of infrastructure projects?

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1 Benefits of geosynthetics

2 Challenges of geosynthetics

3 Examples of geosynthetic applications

4 Trends and innovations in geosynthetics

5 Resources for learning more about geosynthetics

6 Here’s what else to consider

Geotechnical Engineering

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