Field evaluation and behavior of the soil improved using dynamic replacement

Tarawneh, Bashar; Bodour, Wassel Al; Shatnawi, Anis; Ajmi, Khaled Al

doi:10.1016/j.cscm.2018.e00214

Cited by 9 publications

(6 citation statements)

References 10 publications

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“…Some authors have observed the strengthening of the surrounding soil [ 6 , 7 ]. The dynamic replacement method increases the bearing capacity, reduces settlement and speeds up the consolidation process of improved soil [ 3 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…The basis of the analysis is the FEM numerical model, calibrated on the basis of field load tests and laboratory test. A similar approach is used in practice [ 8 ]. It facilitated the definition of four material zones in the form of a column, weak soil surrounding the column, high-strength and stiff soil lying under the column, and the loading plate.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Load Plates Diameters, Shapes of Columns and Columns Spacing on Results of Load Plate Tests of Columns Formed by Dynamic Replacement

Kwiecień

2021

Sensors

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The dynamic replacement method is used to strengthen the subgrade of objects, usually up to 5 to 6 m thick. After the improvement process, acceptance tests in the form of load testing are carried out. Interpretation of the test results can cause some difficulties. Dynamic replacement results in a situation where columns of different shapes, loaded with plates of diameters usually smaller than the head diameter and in the vicinity of adjacent columns, are subjected to load tests. In order to demonstrate the influence of these factors, a spatial model of soil strengthened by dynamic replacement, comprising four material zones, was calibrated on the basis of load testing. The following models were used in the analysis: linear-elastic, elastic–perfectly plastic (Coulomb–Mohr) and elastic–plastic with isotropic hardening (Modified Cam-Clay). This formed the basis for 105 numerical models, which took into account the actual shapes of the columns made at various spacings, subjected to load tests with plates of various diameters. The analyses of the settlements, calculated moduli and stress distribution in the loaded system showed how the results were significantly influenced by mentioned factors. This implies that the interpretation of the results of load tests should be based on advanced spatial numerical analyses, using appropriate constitutive models and including the considered factors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Load Plates Diameters, Shapes of Columns and Columns Spacing on Results of Load Plate Tests of Columns Formed by Dynamic Replacement

Kwiecień

2021

Sensors

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“…Many studies have investigated soil replacement technique. Most of these studies focused on increasing soil bearing capacity and / or decreasing the expected soil settlement [4], [5], [6], [7], [8]. On the other hand, there is a lack of studies that consider the cost of foundation works as one of the governing factors when selecting the replacement layer thickness.…”

Section: Introductionmentioning

confidence: 99%

“…This cost of foundation works is very important factor as well as increasing the soil bearing capacity and decreasing settlement. For example, a major cost burden was reported in the La Rosita power plant in Mexico due to the unnecessary increase in soil replacement thickness by 1 m [8]. Therefore, the objective of this paper is to investigate the main factors affecting the required thickness of replacement layer through developing a computer model that determine the optimal replacement layer thickness and the most suitable type of replacement layer's material.…”

Section: Introductionmentioning

confidence: 99%

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Factors Affecting the Thickness of Replacement Layer on Medium Clay

Elhamid

Abdelaziz²,

Bassioni

2021

AEJ

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Soil replacement is a common technique that can be used to increase the soil bearing capacity and reduce the expected settlement. The thickness of replacement layer depends on many factors such as: the applied stress, original soil properties, material of replacement layer and the cost of foundation works. However, until now the practical thickness of replacement is usually selected based on soil experts’ experience. This study proposed an optimization model to assist geotechnical engineers in predicting the optimum thickness and material type of replacement layer that satisfy the main design requirements, i.e. bearing capacity, consolidation settlement and cost considerations at the same time. The Evolutionary solving method that uses a variety of genetic algorithm and local search methods was used to solve the research problem. Furthermore, the effect of the thickness and properties of clay layer and the depth of ground water table on determining optimum type and thickness of replacement soil were investigated. The study evaluated the relationship between the replacement layer thickness and the total direct cost of foundation works and found that, the notion of increasing replacement thickness to decrease cost limitlessly was not viable and an optimal thickness was usually achieved.

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Experimental and analytical study on the reinforcement mechanism of in-pipe deep dynamic compaction in loose sandy soil

Li,

Sun,

et al. 2024

Acta Geotech.

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Field evaluation and behavior of the soil improved using dynamic replacement

Cited by 9 publications

References 10 publications

Influence of Load Plates Diameters, Shapes of Columns and Columns Spacing on Results of Load Plate Tests of Columns Formed by Dynamic Replacement

Influence of Load Plates Diameters, Shapes of Columns and Columns Spacing on Results of Load Plate Tests of Columns Formed by Dynamic Replacement

Factors Affecting the Thickness of Replacement Layer on Medium Clay

Experimental and analytical study on the reinforcement mechanism of in-pipe deep dynamic compaction in loose sandy soil

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