Measured and predicted response of a new jetted and grouted precast pile with membranes in cohesionless soils

Sudheesh Thiyyakkandi, Michael McVay, David Bloomquist, Peter Lai

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

With increased urbanization, deep foundation (bridges, signage, walls, etc.) selection is moving toward the minimization of disturbance and installation time, as well as addressing quality control and assurance issues. Unfortunately, many types of deep foundations involve noise and vibration during installation (e.g., driven piles) or integrity and reduced resistance issues (e.g., drilled shafts, both conventional and post grouted tip, continuous flight auger piles). This paper presents a new foundation type, a jetted and grouted precast pile, which uses the advantages of several proven deep foundation installation techniques. The installation of the new pile is comprised of three distinct phases: (1) pressurized water-jetting of a precast pile into the ground; (2) side grouting of the pile; and (3) tip grouting. The pile has two separate side grouting zones, each with its own grout delivery system. Each grout zone is covered with a semirigid membrane, which results in radial expansion of the soil during side grouting and horizontal orientation of the major principal stress. Small-scale testing revealed excellent bonding between the pile and the grout, as well as improved mobilized pile-soil skin and tip resistance. Both experimental and FEM modeling of the grouting and axial loading were performed on various sized jetted and grouted precast piles in cohesionless soil. On the basis of this study, a methodology that predicts expected grout pressures during grouting, unit side and tip resistance, and the load-displacement response of a pile in cohesionless soil is proposed. Further testing and research is required to validate the proposed methodology before it can be implemented in practical situations.

Original languageEnglish
Pages (from-to)1334-1345
Number of pages12
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume139
Issue number8
DOIs
Publication statusPublished - Aug 13 2013

Keywords

  • Chamber test
  • Deep foundations
  • Finite-element analysis
  • Jetted and grouted precast pile
  • Pile grouting
  • Skin and tip resistance
  • Soil-structure interactions

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Environmental Science(all)

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