Horizontal sampling: A new direction in site characterization

Erez N. Allouche, Samuel T. Ariaratnam, Kevin W. Biggar, Judd Mah

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Traditionally, sampling and monitoring of potentially contaminated soils and ground water has been achieved using vertical drilling technology. However, vertical drilling presents several technical limitations, including the need to position the drilling rig directly above the target zone and the risk of cross-contaminating laterally stacked aquifers. These limitations may be overcome using horizontal directional drilling technology. This paper gives a short introduction to horizontal directional drilling equipment and installation techniques, followed by an overview of existing horizontal sampling tools. Details for the development of a horizontal multiple port soil sampler are outlined and the future role of horizontal sampling in site investigation is discussed. It is concluded that horizontal directional drilling technology has many applications in site investigation, offering an efficient and cost-effective method of collecting geotechnical and geo-environmental data, both as an alternative and as a complement to vertical drilling and sampling technologies.

Original languageEnglish (US)
Pages (from-to)17-25
Number of pages9
JournalTunnelling and Underground Space Technology
Issue numberSUPPL. 1
StatePublished - Jan 1 1997
Externally publishedYes

ASJC Scopus subject areas

  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


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