Culvert Lining and Flood Defence

The current status of the nation’s infrastructure is such that many of our flood defence and culvert structures are in need of serious repair or replacement.

Unfortunately, the lack of adequate funding combined with the impact on the public produced by closing such structures to traffic often make total replacement or even significant repairs to these structures impractical.
Sprayed concrete application to soffit of culvert - dry spray method over a distance of 150.00 lin metres – Coatbridge, Scotland.

However, there are other options available to restore structural capacity and add years of satisfactory performance to many culvert structures while keeping them open to traffic or at least minimizing the impact on the public.

Sprayed concrete has a wide application range due to its adaptability, flexibility versatility of application, high structural integrity, physical properties and favourable economics. Sprayed concrete is particularly suited to working within confined spaces as a method capable of reinstating failing structures such as culvert linings, scour damage, water retaining structures and other infrastructure impacted by flooding events.

 

Sprayed concrete repair is commonly used for:
  • Refurbishment of existing concrete or brick culverts
  • Emergency and permanent flood alleviation works
  • Reinstatement of retaining walls to watercourses
  • Concrete repair of defective, scoured, impact damaged or spalled concrete structures
  • Strengthening and upgrading of existing culverts
Typical culvert rehabilitation works – hydro-demolition of defective soffit - preparation of steel work and setting guide levels.
Sprayed concrete reinforcement to existing concrete embankment - Flood defences, Sale Water Park, Manchester
The advantages of sprayed concrete in culvert or flood defence construction:
  • Enables working in confined space environments
  • Use of high performance materials with chemical resisting and waterproofing qualities
  • Rapid initial set times to allow early strength gain
  • Application of sprayed concrete repair without any formwork/shuttering
  • High impact bonds to existing substrates
  • Higher daily outputs compared to hand applied concrete repair mortar
  • Increased depth of repair and fewer layers offers a monolithic concrete repair or overlayment
  • Superior encapsulation of steel reinforcement

Successful sprayed concrete work requires the combination of many aspects of modern concrete technology particularly concrete admixture chemistry, combined with modern materials handling technology.

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The increasing demands for cost-effectiveness and the protection of health and the environment mean that sprayed concrete has been in continuous development for the last few decades with a proven track record.
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