Field and Centrifuge Model Test on Heavy Tamping

Takada, Naotoshi; Oshima, Akihiko; Watanabe, Atsushi; Ikeda, Michiharu

doi:10.2208/jscej.1993.469_127

Cited by 5 publications

(4 citation statements)

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“…As for eld and laboratory tests, many researchers had done plenty of outstanding work (Mayne et al 1984;Takada and Oshima 1994;Feng et al 2000;Hu et al 2001;Hwang and Tu 2006;Jia et al 2009). Mayne et al (1984) studied the relationship between the size of the craters, ground vibration levels and depth of in uence and the level of energy per blow according to the data from more than 120 eld tests.…”

Section: Introductionmentioning

confidence: 99%

“…Through laboratory DC tests, the in uence of pounder base shape on the e ciency of DC (Feng et al 2000) and the variation of microstructural variation of soils (Hu et al 2001;Jia et al 2009) were analyzed. Furthermore, the centrifuge test of DC was also used to simulate an actual foundation treatment project (Takada and Oshima 1994).…”

Section: Introductionmentioning

confidence: 99%

“…Apart from those investigations mentioned above, a lot of studies were focused on the numerical modeling of DC (Poran and Rodriguez 1992;Chow et al 1992 and a centrifuge test of dry sand under DC (Takada and Oshima 1994) was modeled in order to investigate the microscopic characteristics of sand under DC at a particle level (Li et al 2018(Li et al , 2021.…”

Section: Introductionmentioning

confidence: 99%

“…Microscopic parameters of numerical modelIn order to analyze the effect of grain gradation on the DC of dry sand, the models with different grain size were established. According to the eld test compared with Takada & Oshima's centrifuge model test(Takada and Oshima 1994), the compression modulus of 5.05 MPa for the sand can be obtained(Li et al 2018(Li et al , 2021. The Poisson's ratio of dry sand was assumed to be 0.3.…”

mentioning

confidence: 99%

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A Microscopic Insight into Effect of Particle Gradation on Dynamic Compaction of Dry Sand

Li,

Xu,

Yang

2023

Preprint

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Particle gradation is an important feature of granular materials, which has a significant influence on the mechanical properties of soil. Several dynamic compaction (DC) tests for mono-sized dry sand samples and a well-graded dry sand sample were modeled using discrete element method. The effect of particle gradation on crater depth was analyzed as well as coordination number, porosity and contact stress from a microscopic view. It is indicated that the change rates of dynamic stress, coordination number and porosity of the well-graded sample were greater than the results from the mono-size samples. For the mono-sized samples and the well-graded sample, the differences of dynamic contact stress, coordination number and porosity became larger as the distance of measurement point from ground surface increased. The results also demonstrate from a microscopic view that the well-graded soil and the soil sample with small particle size were more prone to become dense under DC. This study at a grain level is helpful to understand the microscopic mechanism of DC and has certain guiding significance to the construction of DC.

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