Laboratory and numerical based analysis of floating sand columns in clayey soil

Naseer, Sohaib; Faiz, M. Sarfraz; Iqbal, Sajid; Jamil, S. Muhammad

doi:10.1186/s40703-019-0106-6

Cited by 15 publications

(6 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Naseer et al ( 2019) [17] , the sand column technique is more appropriate in clay with a higher shear strength. For instance, when the shear strength of clay (su) was 32 kPa, the composite ground showed little improvement in ultimate loading capacity and no improvement when su = 14 kPa.…”

Section: Figure 1 Stone Columnmentioning

confidence: 99%

Improving bearing capacity of weak soils: A review

Saleh

2021

j. of constr. res.

View full text Add to dashboard Cite

Weak soils, such as soft clay and loose sand, have a poor bearing capacity, making them incapable of bearing the load of superstructures that will be imposed on them. As a result, engineers must have a solution to the issue of poor bearing capacity in weak soils before embanking into building on them. This paper reviewed the use of stone columns, piled rafts, and geogrids for improving the bearing capability of weak soils. Important findings from recent research are also discussed. From the review of the previous researcher’s findings, it was found that modelling approaches such as physical modelling (full scale, centrifuge, laboratory scale) and numerical modelling are used to study bearing capacity improvement.

show abstract

Section: Figure 1 Stone Columnmentioning

confidence: 99%

Improving bearing capacity of weak soils: A review

Saleh

2021

j. of constr. res.

View full text Add to dashboard Cite

show abstract

“…Mohr-Coulomb constitutive models of soils have commonly been used for FE modeling of Fig. 1 Representative finite element mesh used in the analysis: a typical 3D FE mesh; and b cross-section view and boundary conditions geotechnical structures [3,4,7,9]. To simplify the analysis process, constant material parameters for the soil and anchorage were adopted with reference to literature [6,10,11].…”

Section: Finite Element Modelingmentioning

confidence: 99%

Analysis of the passive earth pressure on a gravity-type anchorage for a suspension bridge

et al. 2020

View full text Add to dashboard Cite

In this study, numerical analyses have been performed for a reasonable gravity-type anchorage design. The emphasis is on evaluating the effect of the passive earth pressure for gravity-type anchorages under pullout loading. Three-dimensional FE analyses were performed for different types of bedrock and embedded depths. Based on this study, it is found that the displacement of the gravity-type anchorage decreased with increasing embedded depth due to the increase in the passive resistance in front of the anchorage. It is also found that the resistance due to passive earth pressure in front of the anchorage accounts for approximately 10-30% of the total resistance and thus represents a significant improvement in the prediction of the realistic resistance for gravity-type anchorages subjected to pullout loads.

show abstract

“…Many researchers have investigated the performance of stone columns under raft, concluding that increases in raft thickness, the diameter of stone columns, and the angle of shearing resistance of stone and decreased spacing in the stone columns can improve settlement and bearing capacity significantly. They also deduced that the length of stone columns has a slight effect on the performance of their foundation systems (e.g., Das and Deb, 2014;Ghazavi and Ashraf, 2013;Nazari and Ghazavi, 2014;Naseer et al, 2019;Nehab et al, 2017;Remadna et al, 2020;Sexton et al, 2014). Similarly, many researchers have studied piled raft foundation systems.…”

Section: Introductionmentioning

confidence: 99%

Geotechnical performance of combined stone columns and piles capped with reinforced concrete raft foundation in soft clay soil

Ahmed¹

2022

Acta Geodynamica Et Geomaterialia

View full text Add to dashboard Cite

Stone columns consist of granular material compacted in long cylindrical holes. They are used for improving the strength and consolidation characteristics of compressible soils. However, they are still less effective at supporting heavy loads, since they still cannot transfer applied stresses to deeper layers of soil. The main objective of this numerical study was to investigate the geotechnical performance of a combined foundation system composed of stone columns and piles grouped together under a rigid raft foundation in compressible soil. The failure mechanism of this hybrid foundation system was examined, and configurations optimizing the performance of the combined foundation system were explored. An analytical model was developed for predicting the ultimate carrying capacity of the combined system in compressible soils. It was deduced that combining stone columns and piles in one foundation system improved considerably the system’s carrying capacity. Moreover, the uppermost improvement was observed when the piles were installed on the periphery or edge of the raft foundation, while stones columns were placed at the center area of the raft. The failure of the combined foundation system started from the center of the raft and noticeably extended to its edges. Due to the presence of stone columns in the combined foundation system, the piles did not interact. The areas affected or influenced by the soil–pile interaction also did not overlap.

show abstract

Laboratory and numerical based analysis of floating sand columns in clayey soil

Cited by 15 publications

References 26 publications

Improving bearing capacity of weak soils: A review

Improving bearing capacity of weak soils: A review

Analysis of the passive earth pressure on a gravity-type anchorage for a suspension bridge

Geotechnical performance of combined stone columns and piles capped with reinforced concrete raft foundation in soft clay soil

Contact Info

Product

Resources

About