Numerical Analysis on the Behavior of Floating Geogrid-Encased Stone Column Improved Foundation

Cheng, Ya; Cai, Xiaocong; Mo, Haizhao; Gu, M.

doi:10.3390/buildings13071609

Cited by 3 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Researchers have conducted extensive theoretical and experimental work in this field and have found that the use of geosynthetics effectively improves bearing capacity and deformation [24][25][26]. Cheng et al [27] conducted a numerical simulation of a floating geogrid-encased stone column to analyze the failure mode and load transfer law of such composite foundations and found that the long column was more prone to generate bulging deformation. Ou Yang et al [28] investigated the effects of geosynthetic-encased and ordinary stone columns on acceleration amplitude and frequency based on model tests.…”

Section: Introductionmentioning

confidence: 99%

Bearing Capacity and Deformation of the Tandem Compound Piles Improved Foundation: A Parametric Study

Guo,

Cai,

2023

Materials

Self Cite

View full text Add to dashboard Cite

The tandem compound piles are a combination of a granular column in the deep section and a concrete pile in the shallow section. This method effectively utilizes the consolidation and densification effects of the granular column, as well as the cementation strength of the concrete material. The granular column acts as a consolidation path, aiding in the densification of the surrounding soil. On the other hand, the concrete pile prevents the bulging deformation that commonly happens in granular columns during field construction. To study the bearing capacity and deformation of the improved foundation with tandem compound piles, a coupled continuum-discrete numerical model was developed in this study. The accuracy of the model was confirmed by comparing its results with experimental measurements. Additionally, a parametric study was conducted, considering three influential factors: (1) cushion thickness and modulus, (2) length, modulus, diameter, and spacing of the tandem compound pile, and (3) soil modulus. The results indicated that reducing the cushion thickness and increasing the cushion modulus allowed the pile to bear more loads. Moreover, increasing the length and modulus of the deep section of the pile reduced deformation and improved the bearing capacity. The pile modulus, however, had a limited effect on enhancing the bearing capacity. It is important to maintain a critical pile spacing of at least twice the pile diameter. Finally, a high modulus of the underlying stratum led to higher vertical and radial stresses in the pile.

show abstract

Section: Introductionmentioning

confidence: 99%

Bearing Capacity and Deformation of the Tandem Compound Piles Improved Foundation: A Parametric Study

Guo,

Cai,

2023

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…In terms of facilitating PVD-assisted ground treatment, model testing, in situ monitoring, and numerical simulation are frequently used in evaluation by research and industrial communities [12,13]. Bo (2016) [10] demonstrated that current model-testing techniques for evaluating the optimal performance of PVD were limited.…”

Section: Introductionmentioning

confidence: 99%

Deformation and Strength Characteristics of Marine Soft Soil Treated by Prefabricated Vertical Drain-Assisted Staged Riprap under Seawall Construction

Wu,

Liu,

Xie

2023

Buildings

View full text Add to dashboard Cite

Prefabricated vertical drains (PVDs) with staged riprap preloading have been widely used in soft soil ground improvement and embankment construction. However, ground treatment effectiveness evaluation is still a difficult problem due to multiple factors. Considering this, in situ monitoring and numerical simulation were conducted to study the deformation and strength characteristics of marine soft soil ground treated by PVD-assisted staged riprap under the Lingni Seawall construction in China. Monitoring and analysis of results showed that use of PVD-assisted staged riprap resulted in a good improvement effect. In particular, in the PVD-treated zone within 10 m in depth, corresponding to a half-length of the PVD, the average radial degree of consolidation reached up to 75–100%, and the soil strength increased significantly by 200–700%. Moreover, numerical simulation showed that the linear 1-dimensional drain element of PVD closely met the engineering accuracy requirements with good consistency with the monitoring data. Compared with a totally solid element model, the numbers of elements and nodes were reduced and the calculating efficiency and model accuracy were increased by using a PVD linear element, which provides a basis for building large complex finite element models.

show abstract

Evaluating the Impact of Mudstone Swelling on Railway Heave of Ballastless Tracks in the Transition Section Using the DEM-FDM Coupling Method

Wang,

Yan,

Ding

et al. 2024

Int. J. Geomech.

View full text Add to dashboard Cite

Numerical Analysis on the Behavior of Floating Geogrid-Encased Stone Column Improved Foundation

Cited by 3 publications

References 32 publications

Bearing Capacity and Deformation of the Tandem Compound Piles Improved Foundation: A Parametric Study

Bearing Capacity and Deformation of the Tandem Compound Piles Improved Foundation: A Parametric Study

Deformation and Strength Characteristics of Marine Soft Soil Treated by Prefabricated Vertical Drain-Assisted Staged Riprap under Seawall Construction

Evaluating the Impact of Mudstone Swelling on Railway Heave of Ballastless Tracks in the Transition Section Using the DEM-FDM Coupling Method

Contact Info

Product

Resources

About