Stability analysis of soil slope based on a water-soil-coupled and parallelized Smoothed Particle Hydrodynamics model

Zhang, Weijie; Zheng, Hu; Jiang, Fuyu; Wang, Zhanbin; Gao, Yufeng

doi:10.1016/j.compgeo.2018.12.025

Cited by 32 publications

(15 citation statements)

References 21 publications

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“…The meshless characteristics of SPH make it easier to deal with the large deformation problem, sequentially eliminating the mesh distortion problems compared with the traditional Lagrange method [26][27][28][29][30]. The cores of this method are the field function approximation and the particle approximation, respectively [31]. The field function approximation refers to the integral expression of the macroscopic variables (such as density, pressure, and acceleration) and the particle approximate means that the weighted summation of motion information is calculated from particles within the influence radius ( Figure 2).…”

Section: Water-soil Coupled Sph Numerical Frameworkmentioning

confidence: 99%

“…Therefore, artificial compressibility is introduced and the pore water is assumed as a kind of compressible fluid that can obtain large pressure changes through small density changes. In addition, the coefficient of viscosity is also considered to acquire the revised formula of pore water pressure (details in [31]). The interaction force between pore water and soil or structure is calculated as [33]…”

Section: Mixture Theory For the Two-phase Coupled Soilmentioning

confidence: 99%

“…The above soil constitutive model requires five soil parameters: cohesion ( ), friction angle ( ), elastic Young's modulus ( ), Poisson's ratio ( ), and soil density ( ). The detailed information can be found in literature [31].…”

Section: =̇+̇(11)mentioning

confidence: 99%

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SPH Simulation on the Coupled Failure of Slope‐Building Adjacent to Water Triggered by the Rapid Drawdown of Water Level

Zhou

Zhang

et al. 2019

Mathematical Problems in Engineering

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With the development of economy, more and more buildings are constructed on both sides of rivers. The rapid drawdown of water level may induce the change of groundwater seepage in the river bank, thus affecting the stability of buildings on the bank. In this study, the right bank of Qinhuai river with its ancillary building from the Dinghuai Gate to the Qingliang Gate in Nanjing City is analyzed to reveal the failure mechanism and coupled failure mode of slope and building adjacent to water. The soil-water coupled SPH program considering the interaction between soil and structure has been proposed. Then this model is used to study the evolutionary deformation mechanism of slope and building under the rapid drawdown of water level. The results indicate that the potential slip surface of slope and the asymmetrical distribution of plastic zone in the foundation of building become more obvious under the rapid drawdown of water level. Besides, the differential settlement of building induced by the rapid drawdown causes the building tilt. When the sliding surface of the slope passes the building, the differential settlement will become larger. This study is conducive to reveal the coupled failure mechanism of slope and building and also to provide scientific basis for the prevention of such disasters.

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Section: Water-soil Coupled Sph Numerical Frameworkmentioning

confidence: 99%

Section: Mixture Theory For the Two-phase Coupled Soilmentioning

confidence: 99%

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SPH Simulation on the Coupled Failure of Slope‐Building Adjacent to Water Triggered by the Rapid Drawdown of Water Level

Zhou

Zhang

et al. 2019

Mathematical Problems in Engineering

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“…e main contents of the tunnel muck are gravel, sand, and clay with different amount of water. e instability of these geomaterials might trigger dreadful disasters [4,[8][9][10][11][12]. Hence, an efficient way to deposit or even to recycle the tunnel muck is of great significance to the environment.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Tunnel Muck with Fly‐Ash Geopolymer

Yang¹,

Xi²,

Chen

et al. 2020

Advances in Civil Engineering

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The tunnel muck has a great potential to be used as a recyclable engineering material in transit and other civil work projects instead of being deposited as construction waste. In this work, the geopolymer is generated by alkali-activated fly ashes, which act as cementitious materials to strengthen the tunnel muck. The tunnel muck has to be dehydrated, grinded, and screened before being treated by alkali-activated fly ash. The effect of the mass ratio between fly ash and tunnel muck (Mfa/Mtm), the mass ratio between Na2SiO3 solution and NaOH solution (MNa2SiO3/MNaOH), the ratio between liquid and solid (Mliquid/Msolid), and molarity of NaOH on the strength of geopolymer were systematically studied by conducting the uniaxial compression experiments. The experimental results indicate that the liquid-to-solid ratio is the most important parameter to the geopolymer strength after the alkali-activated fly ash treatment. On the contrary, molarity of NaOH is less effective on the geopolymer strength. Moreover, the optimum scheme is concluded according to the experimental results as follows: the mass ratio between tunnel muck and fly ash, the mass ratio between Na2SiO3 solution and NaOH solution, the ratio between liquid and solid, and molarity of NaOH are 1 : 2, 1.8, 0.18, and 10 mol/L, respectively. Meanwhile, the SEM images indicate that flocculence from the active substance in fly ash is a crucial component as the cementing material.

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“…e functional forms of the D-P yield failure criterion are shown in equations (1)- (3). is model not only has few parameters and simple calculation but also considers the influence of hydrostatic pressure on the yield and strength of materials and the dilatancy of geomaterials [20]. In this article, the constitutive model of the ABAQUS modified Drucker-Prager model is used.…”

Section: Introduction To Workingmentioning

confidence: 99%

Influence of Water Inrush from Excavation Surface on the Stress and Deformation of Tunnel‐Forming Structure at the Launching‐Arrival Stage of Subway Shield

Wen

Zhai

et al. 2019

Advances in Civil Engineering

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The launching-arrival stage of the shield is the most dangerous construction stage in subway construction. During the conversion process of the soil and air medium in the shield machine, water inrush at the excavation surface often occurs because of the effect of groundwater. Previous research has focused on the overall stress and deformation of existing tunnels caused by water inrush from the excavation face of the shield machine excavation stage. However, the stress and deformation states of the segments and anchors at different assembly locations of the tunnel, as well as the interaction between the soil reinforcement region and the segments and anchors in the launching-arrival stage have not been considered in previous studies. In this study, the inrush model of the launching-arrival stage of the subway shield was established by utilizing the equivalent refinement modeling technology and ABAQUS simulation analysis with consideration of the fluid-solid coupling effect of water and soil to study the influences of different water head differences on the mechanical and deformation properties of segments and anchors in shield construction under the conditions of water inrush on the excavation surface. The results showed that the water inflow from the tunnel excavation surface caused significant surface subsidence at the tunnel portal, vertical convergence at the cross section of the shield tunnel, and significant increases in the axial and shear forces on the bolt. In addition, based on the existing subway regulation, combined with the simulation results of soil reinforcement measures at different depths, the emergency control criterion for controlling water inrush on the excavation surface was established by using the depth of soil reinforcement. The minimum depth of the reinforced soil from the ground surface at 15 m is recommended to ensure construction safety of the subway shield at the launching-arrival stage.

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Stability analysis of soil slope based on a water-soil-coupled and parallelized Smoothed Particle Hydrodynamics model

Cited by 32 publications

References 21 publications

SPH Simulation on the Coupled Failure of Slope‐Building Adjacent to Water Triggered by the Rapid Drawdown of Water Level

SPH Simulation on the Coupled Failure of Slope‐Building Adjacent to Water Triggered by the Rapid Drawdown of Water Level

Mechanical Properties of Tunnel Muck with Fly‐Ash Geopolymer

Influence of Water Inrush from Excavation Surface on the Stress and Deformation of Tunnel‐Forming Structure at the Launching‐Arrival Stage of Subway Shield

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