Dynamic compaction of a thick soil-stone fill: Dynamic response and strengthening mechanisms

Wu, Shuaifeng; Wei, Yingqi; Zhang, Yinqiu; Cai, Hong; Du, Jifang; Wang, Di; Yan, Jie; Xiao, Jun

doi:10.1016/j.soildyn.2019.105944

Cited by 34 publications

(11 citation statements)

References 21 publications

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“…Compaction. According to the previous research results, the mechanism of dynamic compaction is as follows: the shock wave produced by compaction breaks the connection between soil particles, and with the increase of compaction energy, the pore and a particle shape of the pit subsoil develop from a pore shrinkage stage to a particle deformation stage to a particle inlay stage, thus changing the distribution state of all kinds of pores in the soil and their relative content [10]. at is to say, compaction destroys the original loose structure of the soil, changes the connecting mode between the skeleton particles, and makes the soil particles rearrange into a dense structure.…”

Section: Mechanism Analysis Of Consolidation By Dynamicmentioning

confidence: 98%

“…It has the advantages of a short construction period, low cost, low pollution, and high safety. However, due to the large vibration during the dynamic compaction construction, it is necessary to consider whether the surrounding environment of the proposed building is allowed before construction [10]. Vibroflotation is a method of compacting the soil by vibration or compaction in order to improve the bearing capacity of the foundation and reduce settlement.…”

Section: Introductionmentioning

confidence: 99%

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Comparison and Cost Analysis of Soft Soil Foundation Treatment Schemes in Port Construction

Ren

2022

Advances in Civil Engineering

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Due to the characteristics of soft soil foundations in port engineering construction, there is a problem of insufficient bearing capacity, which needs to be treated. This paper analyzes the construction process and key points of the dynamic compaction method, vacuum preloading method, and vibroflotation method, and expounds on the advantages and disadvantages. The cost of different methods is compared. It can be seen that compared with other methods, the vibration impact method has a simple construction process and low cost.

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Section: Mechanism Analysis Of Consolidation By Dynamicmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Comparison and Cost Analysis of Soft Soil Foundation Treatment Schemes in Port Construction

Ren

2022

Advances in Civil Engineering

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“…Since Menard and Broise [1] first proposed the DC method in the 1970s, many researchers have investigated the ground vibrations induced by DC from various perspectives, such as the mechanism of ground improvement and influencing factors, evaluation of reinforcement performance, monitoring of the compaction process, and the impact of vibrations on surrounding areas. Regarding the mechanism of ground improvement and influencing factors, Wu et al [15] studied the compaction behavior of soil aggregate mixed ground and divided the soil into three zones based on the distribution of stress waves, namely an impact strengthened zone, a plastic stress wave strengthened zone, and an elastic zone in which the strength of the soil is not reinforced. Jia et al [16] elucidated the mechanism of loose granular soil reinforcement from the particle scale.…”

Section: Introductionmentioning

confidence: 99%

Field Testing and Numerical Simulation of the Effectiveness of Trench Isolation for Reducing Vibration Due to Dynamic Compaction

Zheng,

Lan,

Pan

et al. 2023

Applied Sciences

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Dynamic compaction is a widely used method to strengthen the foundation, which can cause significant impacts on surrounding structures, making vibration control measures necessary. This study investigates the effectiveness of isolation trenches in reducing ground vibration caused by dynamic compaction in a typical multi-layered alluvial soil foundation adjacent to the Yangtze River. A combination of field testing and numerical simulation was employed to evaluate the vibration isolation effect of trenches at different depths and locations. The results show that trenches have a significant vibration isolation effect on the side away from the tamping point, but they can have an amplifying effect between the trench and tamping point. The effectiveness of the isolation trenches increases with deeper trenches and distance from the tamping point, but the amplification effect decreases with increasing depth. Therefore, when employing trenches, reinforcement measures must be adopted, and a suitable trench depth should be selected. The closer the isolation trench to the dike, the better the protection will be. The study provides effective guidance for designing isolation trenches in similar dynamic compaction processes, emphasizing the importance of considering spatial attenuation characteristics and selecting appropriate trench depths and locations.

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“…The foundation treatment method of dynamic compaction (DC) mainly involves a free-falling heavy tamper to impact the soil foundation. Compared with a dynamic roller, jet grouting, and a pile foundation, DC has outstanding advantages in reinforcement depth, efficiency, and cost [1][2][3]. Therefore, DC has been widely adopted all over the world to strengthen soil foundations, especially in high-fill engineering projects such as earth dams, mountainous airports, and the fill subgrade of roads [4,5].…”

Section: Introductionmentioning

confidence: 99%

Time-Domain Analysis of Tamper Displacement during Dynamic Compaction Based on Automatic Control

Yang

Zhang

et al. 2021

Coatings

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Crater depth is a vital issue in dynamic compaction (DC) because it is a controlling parameter in DC and a characterization index of soil properties. A continuous mathematical model capturing the time-domain process of tamper displacement is presented in this paper. The model is simple and the parameters involved are easy to obtain. It was found that the accumulated crater depth increases but its increment in the crater depth decreases with multiple impacts. Three groups of large-scale DC tests with 10,000 kN∙m were conducted to evaluate the performance of the proposed model. The results showed that the proposed model captures the typical trends in the tamper displacement of single and multiple impacts. In addition, a concept of the crater depth ratio is proposed based on the proposed model, and the concept is used to evaluate the efficiency of DC and to predict the optimum tamping number of DCs.

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Dynamic compaction of a thick soil-stone fill: Dynamic response and strengthening mechanisms

Cited by 34 publications

References 21 publications

Comparison and Cost Analysis of Soft Soil Foundation Treatment Schemes in Port Construction

Comparison and Cost Analysis of Soft Soil Foundation Treatment Schemes in Port Construction

Field Testing and Numerical Simulation of the Effectiveness of Trench Isolation for Reducing Vibration Due to Dynamic Compaction

Time-Domain Analysis of Tamper Displacement during Dynamic Compaction Based on Automatic Control

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