00603608

Component

http://onlinepubs.trb.org...trr/1990/1277/1277-009.pdf

https://scholar.google.co...ison&publication_year=1990

A portion of the proposed location of the Metropolitan Atlanta Rapid Transit Authority (MARTA) Chamblee Station was underlain by uncontrolled fill and soft sandy alluvial soils atop residual Piedmont soils. Due to high groundwater conditions and adjacent railroad tracks, it was not considered viable to excavate and replace these soils. Since this area was to support a Reinforced Earth (TM) wall and the station platform, deep foundations were considered unacceptable due to concerns over differential settlements between the wall, trackway, and platform. The original design called for dewatering, placement of fill, and a surcharge load to preconsolidate the soils. The area was to be monitored with settlement platforms and observation wells that were to be extended as fill was placed. The authors jointly devised a plan to utilize vibrating wire settlement transducers and piezometers to monitor pore pressure dissipation and consolidation. These instruments were used in conjunction with consolidation tests to evaluate the rate of consolidation. Predicted magnitudes and rates of settlement are presented and compared to field measurements.

This paper appears in Transportation Research Record No. 1277, Modern Geotechnical Methods: Instrumentation and Vibratory Hammers 1990. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

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p. 61-70

1990

Transportation Research Record

030905057X

Figures (6) ; Photos (5) ; Tables (4)

Alternatives analysis; Consolidation; Field tests; Fills; Forecasting; Monitoring; Piezometers; Pore pressure; Rail transit stations; Residual soils; Sandy soils; Settlement (Structures); Soft soils; Soil consolidation test; Soils; Transducers; Vibrating wire transducers

Metropolitan Atlanta Rapid Transit Authority

Field measurements; Soil consolidation; Surcharge

Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB

Feb 28 1991 12:00AM

• AXIAL CAPACITY OF VIBRATORY-DRIVEN PILES VERSUS IMPACT-DRIVEN PILES
• AXIAL RESPONSE OF THREE VIBRATORY- AND THREE IMPACT-DRIVEN H PILES IN SAND
• BEARING CAPACITY PREDICTION FROM PILE DYNAMICS
• CONSTRUCTION AND DESIGN OF DRILLED SHAFTS IN HARD PINNACLE LIMESTONES
• CONSTRUCTION CONTROL TESTING OF SLURRY-ASSISTED SOLDIER WALL CAISSONS WITH INCLINOMETER AND NUCLEAR DENSITY PROBES
• DEVELOPMENT OF AN EXPERT SYSTEM FOR PRELIMINARY SELECTION OF PILE FOUNDATION
• EVALUATION OF BEARING CAPACITY OF VIBRO-DRIVEN PILES FROM LABORATORY EXPERIMENTS
• FIELD MONITORING OF EXPANSIVE SOIL BEHAVIOR
• FIELD PERFORMANCE OF A GEOGRID-REINFORCED EMBANKMENT
• FIELD TEST OF A GEOTEXTILE-REINFORCED LEVEE
• INSTRUMENTATION FOR MEASURING EARTH PRESSURES DUE TO COMPACTION
• INSTRUMENTATION OF CUMBERLAND GAP PILOT TUNNEL
• INSTRUMENTATION OF DEEP CORRUGATED STEEL BOX CULVERTS
• INSTRUMENTATION OF GEOGRID-REINFORCED SOIL WALLS
• ON THE CHARACTERIZATION OF SUCTION IN SWELLING CLAY
• STUDY OF FLOW IN COMPACTED COLUMNS OF SWELLING CLAY
• TECHNIQUES OF BACKFIGURING CONSOLIDATION PARAMETERS FROM FIELD DATA
• USE OF DUAL TUBE NUCLEAR GAUGE FOR CRACK DETECTION IN EXPANSIVE CLAY SOILS