Column Group Analyses for Stone Column Reinforced Foundation

Tan, Siong Kiat; Ng, Kok Shien; Sun, Ju

doi:10.1061/9780784413265.048

Cited by 14 publications

(11 citation statements)

References 10 publications

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“…1 Failure mechanisms of group columns (adapted from Wood [16]) us that the column length should surpass this failure depth for optimal design of the floating stone column. On one hand, Tan et al [15] demonstrated that in all the analyzed cases (4,9,16,25,36,49,64,81 and 100 numbers of columns), the L opt are ranging from 1.20D to 2.2D (higher than the wedge failure depth l c obtained above) for footprint replacement ratio from 0.2 to 0.7. In the authors' analysis, spread footings were placed upon a 0.5 m thick transfer layer (granular mat or crust) overlying soft soil.…”

Section: Optimum (Critical) Length Determinationmentioning

confidence: 79%

“…The finite element study by Tan et al [15] and Wood [16] showed the existence of the optimum length, L op for stone columns which is the column length where lengthening it will not significantly contribute to the reduction of settlement. The optimum length, L opt for stone columns are controlled by the dimension of the footing and somewhat influenced by the footprint replacement ratio, A F .…”

Section: Optimum (Critical) Length Determinationmentioning

confidence: 99%

“…It is possible that the design procedure of the equivalent raft method can be extended to stone column group with some modification to account for the inherent differences. Numerical modeling by Tan et al [15] was adopted as reference during the development of this design approach. In the study, 2D axisymmetric models were used.…”

Section: Design Conceptmentioning

confidence: 99%

“…Hence, a method with above attributes was developed to predict the settlements for foundation supported by a group of stone columns. This method is extended from the Tan et al's [15] work where FEM drained (long term with no excess pore pressure built up) analyses was performed on the small floating columns group in soft ground subjected to a typical working loading range of 0-150 kPa. The idea of optimum length is incorporated into this method.…”

Section: Introductionmentioning

confidence: 99%

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Settlement Prediction of Stone Column Group

Tan²

2015

Int. J. of Geosynth. and Ground Eng.

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Stone columns can be designed to bear on the hard stratum or as a floating system where the toe is embedded in the soft layer. Most of the existing design methods for stone columns adopt unit cell idealization which is not applicable to spread footing. From the view of settlement analyses, current available methods to evaluate the settlement performance of a footing on a limited number of stone columns are more or less rough approximations derived from the elastic theory or using simple empirical approach. None of these methods incorporate the idea of optimum length and the yielding effect in the plastic zone. This paper introduces a new mechanical method to account for these. This method works for homogenous and non-homogenous ground condition. The settlement predictions made by the proposed method are compared with the finite elements results and field measurement. Good agreements are obtained not only for load settlement response but also the displacement profile.

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Section: Optimum (Critical) Length Determinationmentioning

confidence: 79%

Section: Optimum (Critical) Length Determinationmentioning

confidence: 99%

Section: Design Conceptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Settlement Prediction of Stone Column Group

Tan²

2015

Int. J. of Geosynth. and Ground Eng.

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“…This value is influenced by the area replacement ratio together with the length ratio and those are the important factors in determining the stone column performance. A previous study by Tan et al (2014) suggested that the optimum length can be computed as: …”

Section: Simplified Design Approachmentioning

confidence: 99%

Prediction of Drained Settlement and Ultimate Bearing Capacity for Stone Columns Supported Foundation

2017

Soil Testing, Soil Stability and Ground Improvement

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Abstract. This paper presents a validation of simplified design approach against a field study and a laboratory test. The design approach has been developed to predict drained settlement and the ultimate bearing capacity of stone columns supported foundation adopting a hyperbolic relationship to simulate the strain hardening behavior. The result of a plain footing load test is required to give two curve fitting parameters and then adapted them by introducing a reduction factor which take into account the length ratio and the area replacement ratio to predict the stress-strain characteristic of a stone column supported foundation. Good agreements are found when the predictions using the simplified approach are compared with the laboratory testing and field case study.

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Practical Design of Stone Column in Predicting Settlement Performance

Chew

2021

Lecture Notes in Civil Engineering

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Column Group Analyses for Stone Column Reinforced Foundation

Cited by 14 publications

References 10 publications

Settlement Prediction of Stone Column Group

Settlement Prediction of Stone Column Group

Prediction of Drained Settlement and Ultimate Bearing Capacity for Stone Columns Supported Foundation

Practical Design of Stone Column in Predicting Settlement Performance

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