Consolidation and deformation around stone columns: Comparison of theoretical and laboratory results

Castro, José Villaverde; Cimentada, A.; Costa, Almudena Da; Cañizal, Jorge; Sagaseta, C.

doi:10.1016/j.compgeo.2012.09.004

Cited by 44 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The structures are subjected to excessive settlement, leading to stability issues, due to very low strength and high compressibility of soft clay. Granular piles (also known as stone columns) are constructed in soft clays by partial replacement of unsuitable native soil with dense and highly permeable granular material to improve the bearing capacity, to reduce settlements and to increase the rate of consolidation [1][2][3]. Under compressive load, granular piles fail in bulging, sliding and general shear [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Analysis of Geosynthetic-Reinforced Floating Granular Piles in Soft Clays

Hasan

Samadhiya

2016

Int. J. of Geosynth. and Ground Eng.

View full text Add to dashboard Cite

The installation of reinforced granular piles is a commonly adopted technique to improve load carrying capacity and reduce settlements in very soft clayey soils. This paper presents results of a series of laboratory model tests and numerical analysis carried on geosynthetic reinforced granular pile under short term loading. Unit cell concept has been adopted. Laboratory model tests were conducted on unreinforced, vertical encased, reinforced with horizontal strips and combined vertical-horizontal reinforced granular piles. The loading was applied either over the entire cylindrical tank area or only over the area of granular piles. The effects of various parameters such as reinforcement, encasement stiffness, shear strength of clay, length and diameter of granular piles have been studied. Experimental results in the form of vertical load intensitysettlement relationship have been compared with that obtained from PLAXIS 3D. The results of laboratory model tests indicated significant influence of reinforcement on the ultimate load intensity of granular piles and ultimate bearing capacity of treated ground. Lateral bulging in reinforced granular piles has also been controlled by incorporating geosynthetic materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Analysis of Geosynthetic-Reinforced Floating Granular Piles in Soft Clays

Hasan

Samadhiya

2016

Int. J. of Geosynth. and Ground Eng.

View full text Add to dashboard Cite

show abstract

“…The Young’s modulus of the columns is usually between 25 and 100 MPa ( Table 3 ) and it also varies with the confining pressure. A hyperbolic power law is sometimes used to reproduce the stress dependent stiffness of the gravel of the columns (e.g., [ 58 , 95 , 96 ]). The common value of the exponent of the power law is around 0.3 ( Table 3 ).…”

Section: Properties Of the Columnsmentioning

confidence: 99%

Modeling Stone Columns

Castro

2017

Materials

Self Cite

View full text Add to dashboard Cite

This paper reviews the main modeling techniques for stone columns, both ordinary stone columns and geosynthetic-encased stone columns. The paper tries to encompass the more recent advances and recommendations in the topic. Regarding the geometrical model, the main options are the “unit cell”, longitudinal gravel trenches in plane strain conditions, cylindrical rings of gravel in axial symmetry conditions, equivalent homogeneous soil with improved properties and three-dimensional models, either a full three-dimensional model or just a three-dimensional row or slice of columns. Some guidelines for obtaining these simplified geometrical models are provided and the particular case of groups of columns under footings is also analyzed. For the latter case, there is a column critical length that is around twice the footing width for non-encased columns in a homogeneous soft soil. In the literature, the column critical length is sometimes given as a function of the column length, which leads to some disparities in its value. Here it is shown that the column critical length mainly depends on the footing dimensions. Some other features related with column modeling are also briefly presented, such as the influence of column installation. Finally, some guidance and recommendations are provided on parameter selection for the study of stone columns.

show abstract

“…In regard to the analytical studies, Pulko et al [6] developed a design procedure based on analytical closed-form solution for non-encased and encased stone columns, taking into account the encasement stiffness, column arrangements and load levels. Castro et al [7] compared the stress distribution and the settlement reduction of end-bearing columns from analytical solutions with those from Abstract: Soft cohesive soils containing much silt or clay content with low bearing capacity are not suitable for deep vibratory compaction. To improve the bearing behavior of these types of soils to withstand against heavy building loads, the surrounding soil mass must be reinforced with any stiff physical or chemical admixture.…”

Section: Introductionmentioning

confidence: 99%

Machinery/Service system Scheduled Replacement time determination: A combine Weighted Aggregated Sum Product Assessment, Additive Ratio Assessment and Age Replacement Model approach

Emovon¹,

Mgbemena²

2018

IJIE

View full text Add to dashboard Cite

Consolidation and deformation around stone columns: Comparison of theoretical and laboratory results

Cited by 44 publications

References 11 publications

Experimental and Numerical Analysis of Geosynthetic-Reinforced Floating Granular Piles in Soft Clays

Experimental and Numerical Analysis of Geosynthetic-Reinforced Floating Granular Piles in Soft Clays

Modeling Stone Columns

Machinery/Service system Scheduled Replacement time determination: A combine Weighted Aggregated Sum Product Assessment, Additive Ratio Assessment and Age Replacement Model approach

Contact Info

Product

Resources

About