00738871

Component

https://doi.org/10.3141/1569-04

http://scholar.google.com...umas&publication_year=1997

Geotechnical analyses of bridge foundations are complex because of the difficulties in addressing the highly nonlinear and anisotropic stress-strain-strength-time behavior of soils, from the nondestructive small-strain range region through to failure conditions. Often engineering practice overrelies on a single test value from soil borings [the standard penetration test (SPT) N-value] for the evaluation of all necessary geotechnical parameters, which is unrealistic. There exists, in fact, a variety of in situ measurement devices for the better definition of soil engineering properties, particularly hybrid devices such as the seismic piezocone and seismic flat dilatometer, as related to foundation applications. The importance of small-strain field stiffness measurements (i.e., shear wave velocity) is discussed and illustrated with two case studies involving the axial response of drilled shaft and driven pile foundations. The examples are reviewed within the context of elastic continuum theory but may be applied similarly for use in site-specific determinations of nonlinear spring constants and well-known t-z, p-y, or q-z curves, or all three.

This paper appears in Transportation Research Record No. 1569, Design and Analysis of Foundations and Sand Liquefaction.

English

p. 26-35

1997

Transportation Research Record

0309059720

Figures (8) ; References (50) ; Tables (1)

Axial loads; Bridge foundations; Case studies; Dilatometers; Engineering soils; Field tests; Geotechnical engineering; Properties of materials; S waves; Shear rate; Soil penetration test; Soils; Structural analysis; Structural mechanics; Support piles

Drilled shafts; Driven piles; Shear wave velocity; Soil properties; Structural response

Bridges and other structures; Design; Geotechnology; Highways; Materials; I24: Design of Bridges and Retaining Walls; I42: Soil Mechanics

TRIS, TRB

Jul 11 1997 12:00AM

• CENTRIFUGE TESTING OF PLUMB AND BATTERED PILE GROUPS IN SAND
• INNOVATIVE LOAD TESTING OF DEEP FOUNDATIONS
• PEAK UNDRAINED RESISTANCE OF LOOSE SANDS
• PREDICTION OF LATERAL LOAD RESPONSE FOR A PILE GROUP
• RESISTANCE FACTORS FOR SINGLE DRIVEN PILES FROM EXPERIMENTS
• SOIL-PILE-SUPERSTRUCTURE INTERACTION IN LIQUEFIABLE SAND
• THE FLORIDA PIER ANALYSIS PROGRAM: METHODS AND MODELS FOR PIER ANALYSIS AND DESIGN