Editorial Note - Vol. 11, No. 1, 2017-Article

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This issue of the <em>Journal of the Deep Foundations Institute</em> presents research and reviews on four geotechnical topics:

- <strong>Battered piles supporting levee T-walls:</strong> Numerical simulations examine how batter angle and structural head fixity affect pile bending moments under settlement-induced loading. For the conditions studied, bending moment increased linearly with batter angle and decreased as piles were oriented closer to vertical.
- <strong>Cased and uncased drilled shafts:</strong> Tests on four full-scale instrumented shafts show that uncased shafts developed significantly greater axial shaft resistance than cased shafts. The study details load–displacement behaviour, load transfer, and shaft resistance relationships.
- <strong>Soil nails for slope stabilisation:</strong> Three-dimensional parametric analyses investigate how nail length and orientation, slope height, and surcharge affect performance. The authors recommend nail geometries for the upper, middle, and lower portions of slopes.
- <strong>Seismic behaviour of helical piles:</strong> A review surveys available seismic testing, current design standards, and research needs related to using helical piles for earthquake mitigation and seismic retrofits.

The editors highlight the practical value of these studies and encourage contributions that advance geotechnical engineering practice.

Keywords

geotechnical engineering

battered piles

levee T-walls

drilled shafts

axial shaft resistance

load-displacement behavior

soil nails

slope stabilization

helical piles

seismic behaviour