Study on the Deformation of Loose Sand under Cyclic Loading by DEM Simulation

Hu, Minyun; O’Sullivan, Catherine; Jardine, Richard; Jiang, Mingjing

doi:10.1061/41101(374)32

Cited by 1 publication

(1 citation statement)

References 11 publications

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“…Yimsiri [19] studied the effect of soil structure on soil mechanical behavior by numerical simulations using the discrete element method. Hu et al [20] and Nguyen et al [21] simulated and discussed the effect of the interaction between particles on the stress-strain behavior of materials by the discrete element method. Jiang et al [22] researched the microstructural evolution of sandy soil by studying the coordination number and contact structure using the discrete element method.…”

Section: Introductionmentioning

confidence: 99%

Deformation Mechanism of Underlying Sandy Soil Induced by Subway Traffic Vibrations

Sun,

He,

Sun

et al. 2024

Sustainability

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The safety of the geotechnical environment around subways is vitally important for their sustainability. Ground settlement is a very common threat to the safe operation of subways and is related to subway traffic vibrations. Taking Nanjing subway line 10 as an example, field tests, discrete element simulations, and a grey relational analysis are carried out to study the deformation mechanism of the underlying sandy soil induced by vibrations. The results show that the vibration load of Nanjing subway Line 10 is mainly concentrated in the vertical direction. The particles’ coordination number below the subway increases under the vibration load, while the coordination number on the side of the tunnel decreases, which may cause a shear dilatancy effect. Among the five microscopic indexes, the local porosity and the coordination number are closely related to the deformation. Although the deformation of the underlying sandy soil is quite small under the subway traffic load, it will accumulate under frequent loading and then lead to urban engineering geological disasters.

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