Modelling of surface heave contributing factors in directional boring operations

Jason S. Lueke, Samuel Ariaratnam

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

As the utilization of horizontal directional drilling increases in urban areas, damage resulting from surface heave during pullback is becoming a greater concern for municipalities, regulatory agencies and contractors alike. The magnitude and extent of surface deformations are influenced by several factors including; borehole pressure, depth of cover, soil density, back ream rate, soil composition, annular space, reamer type and diameter. With any complex system, understanding how these factors relate to each other in the development of surface deformations is beneficial in the planning of future installations. This paper outlines the development of a model to understand how the aforementioned factors contribute to surface heave during the back ream phase of a horizontal directionally drilled installation. Initial identification and selection of factors to be utilized in the model were facilitated using a panel of experts and the Analytical Hierarchy Procedure (AHP). Using the ranking identified by the AHP, a full factorial experiment was designed and implemented under actual field conditions with ground movements measured at various stages along four uniquely designed borepaths. Results from this experiment are utilized in the development of a model to further understand how these factors relate to each other in the propagation of surface displacements. With a better understanding of the factors associated with directionally drilled installations, contractors and engineers may better select tooling and techniques to minimize the magnitude and extent of surface heave.

Original languageEnglish (US)
Title of host publicationCSCE 30th Annual Conference Proceedings
Subtitle of host publication2002 Challenges Ahead - 4th Structural Specialty Conference, 4th Transportation Specialty Conference and 2nd material Specialty Conference
Pages631-640
Number of pages10
StatePublished - Dec 1 2002
EventCanadian Society for Civil Engineering - 30th Annual Conference: 2002 Chellenges Ahead - Montreal, QB, Canada
Duration: Jun 5 2002Jun 8 2002

Publication series

NameProceedings, Annual Conference - Canadian Society for Civil Engineering
Volume2002

Other

OtherCanadian Society for Civil Engineering - 30th Annual Conference: 2002 Chellenges Ahead
CountryCanada
CityMontreal, QB
Period6/5/026/8/02

    Fingerprint

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Lueke, J. S., & Ariaratnam, S. (2002). Modelling of surface heave contributing factors in directional boring operations. In CSCE 30th Annual Conference Proceedings: 2002 Challenges Ahead - 4th Structural Specialty Conference, 4th Transportation Specialty Conference and 2nd material Specialty Conference (pp. 631-640). (Proceedings, Annual Conference - Canadian Society for Civil Engineering; Vol. 2002).