A comparative study of trenchless technologies versus traditional open trenching for the replacement of ageing potable water pipelines

  title={A comparative study of trenchless technologies versus traditional open trenching for the replacement of ageing potable water pipelines},
  author={S. Hay},
  • S. Hay
  • Published 13 June 2014
  • Engineering
The urgent need to rehabilitate or replace ageing deteriorated buried potable water pipeline networks is one of the many critical service utility provision challenges faced within the municipalities in South Africa. The majority of these unreliable deteriorated pipeline networks consist of un-dipped (not coated with bitumen) AC piping which have long passed their planned economic and technical lifespan. Traditionally, the open trenching method has been utilised for the replacement of aged and… Expand
Underground pipelines and railway infrastructure – failure consequences and restrictions
Abstract Underground pipelines are an essential part of the transportation infrastructure. The structural deterioration of pipelines crossing railways and their subsequent failures can entailExpand


Advancement of condition assessment techniques for large diameter pipelines
Condition assessment of ageing pipelines is a continual challenge in South Africa and around the world. Owners of large diameter water and wastewater pipelines face particular difficulties due toExpand
Laboratory testing of pipe splitting operations
Abstract Pipeline replacement ‘on line’ has been practised for many years using pipe bursting technologies, which typically involve multiple fracture and outward displacement of fragments of theExpand
Fluid migration into lined pipelines
Abstract Lining of a pipe with a polymeric liner is a viable trenchless technology for rehabilitating sewer pipelines. Polymeric liners are typically installed within the deteriorated segments of aExpand
Development of the trenchless rehabilitation process for underground pipes based on RTM
Abstract In order to overcome the disadvantages of conventional excavation technology for repairing and replacing worn-out underground pipes, various trenchless technologies have been developed andExpand
User cost savings in eliminating pavement excavations through employing trenchless technologies
When a pipeline is installed under flexible pavement structures using open excavation and fill methods, the excavation can result in premature pavement deterioration due to difficulties associatedExpand
Underground asset location and condition assessment technologies
There is no single technology which can locate all underground utility services with complete certainty or that can provide a means of condition assessment that is generally applicable, and the development of multi-sensor tools is advocated both for the location and condition assessment of pipelines. Expand
A risk management approach to safety assessment of trenchless technologies for culvert rehabilitation
Proper functioning of culverts is not only critical to protecting the transportation system from flooding but also critical to maintaining the expected service life of the overall transportationExpand
Design and reliability of pipeline rehabilitation liners
Abstract Tight fitting liners are routinely used to rehabilitate deteriorated pipelines. In the United States, these liners are designed using the equation given by ASTM F1216. For the partiallyExpand
Current trends in pipe bursting for renewal of underground infrastructure systems in North America
Abstract As municipalities seek innovative technologies that can provide cost savings in addressing their underground infrastructure needs, trenchless pipe replacement, or pipe bursting, has become aExpand
Decision aids for the selection of installation technology for underground municipal infrastructure systems
Sewer systems for a vital component of the municipal infrastructure in the US. Many of the municipal utility systems in the US were constructed during the turn of the 20th century and are reachingExpand