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Dilatometer Tests in Sand

by Suzanne Lacasse, Norwegian Geotechnical Inst, Oslo, Norway,
Tom Lunne, Norwegian Geotechnical Inst, Oslo, Norway,



Document Type: Proceeding Paper

Part of: Use of In Situ Tests in Geotechnical Engineering

Abstract:

The paper presents two applications of the dilatometer test in sands: control of compaction and determination of constrained modulus. Twelve dilatometer tests were carried out before and after compaction of a 15 m high sand deposit. The tests were run as a method for compaction control and to determine the strength and compressibility characteristics of the sand. The results suggest that the compaction was effective over at least a 14 meter depth. The compaction resulted in increases in in situ horizontal stress, resistance to compression and effective friction angle. Constrained moduli derived from dilatometer tests on a loose sand compared very well with moduli determined from backcalculations of the settlement of silos and from screw plate tests.

Subject Headings: Compacted soils | Soil modulus | Soil properties | Soil dilatancy | Soil compression | Soil settlement | Measuring instruments

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