Uniformity of lime-cement columns for deep mixing: a field study

Larsson, Stefan; Dahlström, Marcus; Nilsson, Bengt

doi:10.1680/grim.9.1.1.58541

Cited by 12 publications

(4 citation statements)

References 9 publications

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“…Ground improvement by soil mixing has highly variable results, and this has a nonlinear impact on reliability analyses for soil foundation supported structures [5]. It is possible to study the influence of several factors affecting the mixing process simultaneously [6]. Deep soil mixing is an extremely valuable and competitive ground engineering technology if applied correctly, designed properly, and constructed efficiently [7].…”

Section: Resultsmentioning

confidence: 99%

Bearing capacity of mixed soil model

Namdar

Pelkoo

2009

Frattura Ed Integrità Strutturale

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ABSTRACT. The main objective of this research is the improvement of red soil by the addition of construction materials. This method could provide a scientific way to create a soil foundation with sufficient stability against geo-technical problems or instabilities. Laboratory tests have been conducted to characterize the behavior of red soil when amended with different types of gravels, soils and sand under compacted conditions with Optimum Moisture Content (OMC). Safe bearing capacity of all models have been calculated to identify the best and worst soil mixed model.

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Section: Resultsmentioning

confidence: 99%

Bearing capacity of mixed soil model

Namdar

Pelkoo

2009

Frattura Ed Integrità Strutturale

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“…Among deep improvement methods, the DSM method with different slurry and additive like cement, microsilica, fly ash, lime and etc. has received much attention from geotechnics and geology researchers [14][15][16][17][18][19][20][21][22][23]. For instance, the effect of salt in loose soil was studied on soil improvement adopting deep soil mixing method with cement slurry.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Investigation on the Effect of Microsilica Additive on the Mechanical Behavior of Deep Soil Mixing Columns in Saline Dry Sand

Esmaeili

Astaraki

Yaghouti

et al. 2021

Period. Polytech. Civil Eng.

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Since loose and salty subgrades consider as problematic barriers while constructing new transportation infrastructures such as railway tracks and roads are required, the current study aims to find a solution to stabilize these kinds of subgrades using the deep soil mixing (DSM) technique and micro silica additive. In the present study a series of experimental DSM columns were executed in a salty sand-filled chamber utilizing a laboratory scale DSM apparatuses. In the first step, by adding three salt percentages of 5, 10 and 20 into the original sand, four different sandy subgrades with a relative density of 70% were prepared. Considering three percentages of 10, 15 and 20 for micro silica additive, the water-to-cement ratio of 1, salt percentages of 0, 5, 10 and 20 totally 150 sand-cement columns were constructed in the lab environment. In continuation, unconfined compression strength (UCS) and elasticity modulus of all capped DSM columns have been determined and interpreted using scanning electron microscope (SEM) images at three ages of 7,14 and 28 days. The results indicated that increasing the salinity of subgrade soil from 0 to 20% resulted in a falling UCS and Young module by 28 and 21% for 28-days specimens. Furthermore, as a solution, adding micro silica in cement-water grout up to 15% resulted in enhancing mechanical characteristics of the DSM columns. So that adding 15% microsilica caused a 21 and 42% increase in UCS and elasticity modulus of 28-days samples respectively, executed in subgrade with 20% salt.

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“…Additionally, some of the research work is related to the study of the factors which affect the installation of DMC in the field (number of mixing blades, rotational speed, etc.) in terms of the main properties of the soil-binder mixture, establishing a comparison with the properties obtained in the laboratory (Van Impe, 2006, Larson et al, 2005Shen et al, 2008;Larsson et al, 2005). The numerical analyses that have been published about the behaviour of embankments (or building foundations) built on soft soil reinforced with DMC are in general back analyses of case studies, using numerical analysis with commercial software (PLAXIS, FLAC, ANSYS, etc.…”

Section: Introdutionmentioning

confidence: 99%

Applicability of Deep Soil Mixing for Use in Embankments and Foundation Support

Tajabadi¹,

Dehghani²,

Foroughi³

et al. 2017

IJSRK

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Abstract.Problematic soils present a difficult challenge for geotechnical engineering due to the high settlement of the soil structure and the often associated high water table and moisture content. The Deep Soil Mixing (DSM) method, which is a soil stabilization technique, has been commonly applied to improve Different parameters of soil. The application covers on-land and in-water constructions ranging from strengthening the foundation ground of buildings, embankment supports, earth retaining structures, retrofit and renovation of urban infrastructures, liquefaction hazards mitigation, man-made island constructions and seepage control. In this paper important parameters that effect in performance of deep soil mixing (DSM) and different design steps of DSM is examined. In this regard embankment investigates when use of DSM with finite element method. the results shows by increase of diameter and height of columns safety factor and settlement decrease but this parameters effects Up to a certain amount Then it is negligible Effect.

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Uniformity of lime-cement columns for deep mixing: a field study

Cited by 12 publications

References 9 publications

Bearing capacity of mixed soil model

Bearing capacity of mixed soil model

Laboratory Investigation on the Effect of Microsilica Additive on the Mechanical Behavior of Deep Soil Mixing Columns in Saline Dry Sand

Applicability of Deep Soil Mixing for Use in Embankments and Foundation Support

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