Soil Investigation of Fly Ash Deposit Improved by Heavy Compaction Method

• Published in: Journal of Geotechnical and Geoenvironmental Engineering Vol. 138; no. 6; pp. 738 - 746
• Main Authors: Kokusho, T, Nakashima, S, Kubo, A, Ikeda, K
• Format: Journal Article
• Language: English
• Published: Reston, VA American Society of Civil Engineers 01.06.2012; American Society of Civil Engineers (ASCE)
• Subjects: Applied sciences; Buildings. Public works; Deposits; Exact sciences and technology; Fly ash; Geoenvironmental engineering; Geotechnics; Grounds; Nonuniformity; Sandy soils; Soil (material); Soil investigations. Testing; Technical Papers; Test procedures; Cone penetration tests; Liquefaction; In situ test; Property of soil; Penetration test; Compaction; Soil investigation; Soil liquefaction; Characterization; Soil settlement; Fly ash; Heavy compaction; Particle size distribution; Fly ash deposit; Soil test; Pore pressure; Cone penetration test
• ISSN: 1090-0241; 1943-5606
• DOI: 10.1061/(ASCE)GT.1943-5606.0000644

AbstractAn in situ test program was undertaken to systematically investigate the effectiveness of the heavy compaction method (HCM) normally used for sandy soils for compacting fly ash deposit. Measurements of soil performance and cone penetration tests before and after the compaction were carried out, indicating obvious effects on soil properties and strength increase in the improved ground. It has been found that HCM introduces three-dimensional (3D) nonuniformity in the upper part versus horizontally uniform layers in the lower part of the improved ground. Also found is that the HCM-induced vertical soil strain is almost proportional to the ratio of cone resistance increment to the prior-treatment cone resistance in the uniform zones.