Compaction Grout: A Case History of Seismic Retrofit

Ivanetich, Kenneth; Gularte, Francis B.; Dees, Becky

doi:10.1061/40516(292)6

Cited by 5 publications

(2 citation statements)

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“…Therefore, Boulanger and Hayden (1995) reported that the more compressible the soil, the lower the rate of improvement with a SA . Similar observations were also reported by Ivanetich et al (2000) and Miller and Roycroft (2004). These observations on the effect of soil type and compressibility on the improvement rate with a SA are consistent with the correlations presented previously [ Fig.…”

Section: Effect Of Soil Propertiessupporting

confidence: 93%

“…Compaction grouting is usually considered ineffective in the treatment of relatively shallow soils (e.g., Graf 1969;Brown and Warner 1973;Ivanetich et al 2000). However, for some problems, compaction grouting provides very appropriate solutions that may necessitate extending the grouting zone to a few meters from the ground surface (e.g., Donovan 1984;Ivanetich et al 2000;El-Kelesh et al 2002). Effective planning of these shallow treatments requires a better understanding of the improvement versus depth and effectiveness controlling factors.…”

Section: Introductionmentioning

confidence: 99%

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Field Investigation into Effectiveness of Compaction Grouting

El-Kelesh

Matsui

Tokida

2012

J. Geotech. Geoenviron. Eng.

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The common design approach of compaction grouting for ground improvement works is oversimplified and does not account for the effects of soil properties and grouting variables. The obtained improvements therefore appear inconsistent with the predicted ones. This paper presents the results of a field test conducted at Tokyo International Airport to evaluate the effectiveness of compaction grouting under well-controlled conditions. The test consisted of 87 compaction grout piles injected in three cases of different pile diameters and spacings. The paper also discusses the effects of soil properties, replacement ratio, and injection sequence on the effectiveness that is evaluated in terms of the standard penetration test N-value and cone penetration test tip resistance, and the variation of effectiveness with depth. A new design procedure that accounts for the effects of initial soil properties is introduced. It has been found that the injection sequence has a significant effect on the grouting mechanisms and effectiveness; this effect is discussed for both high and low compressibility soils. Significant observations are also made on relatively shallow treatments, the associated ground surface heave, and the corresponding improvement.

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Section: Effect Of Soil Propertiessupporting

confidence: 93%