Evaluation of effect of insertion of casing by rotation on existing piles

Inazumi, Shinya; Tanaka, Shigeaki; Komaki, Takahiro; Kuwahara, Shuichi

doi:10.1680/jgere.20.00042

Cited by 15 publications

(9 citation statements)

References 14 publications

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“…Computer-aided engineering (CAE) [4][5][6][7][8] refers to the technology that helps to simulate and analyze large-scale construction experiments from the various stages using the prototypes on a computer. These prototypes are created by CAD (computeraided design) and others, considering the surrounding conditions [4][5][6][7][8].…”

Section: Cae and Mps Methodsmentioning

confidence: 99%

Soil Behavior Modeling by MPS-Cae Simulation

Shakya¹

2023

GEOMATE

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Many numerical simulation methods have been developed in the current research field. The authenticity of the simulation-based research depends on the accuracy of the model prepared. The modeling of the soil becomes challenging when there is the presence of water and the soil starts behaving like a fluid. This study focuses on the application of the MPS (moving particle semi-implicit) -CAE (computer-aided engineering) method to design the setup for the unconfined compression test to determine the correct parameters of the soil model. The soil material is assumed to be Bingham fluid and will be employed as a biviscosity model, where the soil particle exists at both rigid and fluid states depending upon the condition. The best-fitting soil model was designed for the primary parameters and is compared with the benchmark soil data to justify the claim. Furthermore, the authors endeavored to find the secondary governing factors that will affect the accuracy of the soil modeling. The results show that the values of the primary parameters are influenced by the values of the secondary parameters, resulting in a different model. The influence of the secondary parameters was studied, and the best-fitting soil model was designed by incorporating both primary and secondary parameters. The resultant soil model is expected to provide more accurate results if used as a reference in various construction simulations.

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Section: Cae and Mps Methodsmentioning

confidence: 99%

Soil Behavior Modeling by MPS-Cae Simulation

Shakya¹

2023

GEOMATE

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“…A computer-aided engineering system (CAES) is a type of alternative technology for running large-scale experiments, conducted in a room or in situ, using prototypes that have been prepared for a study as part of the development process of "manufacturing". In other words, CAES is a general term incorporating technology that simulates and analyzes prototypes on a computer created using computer-aided design (CAD), considering the site conditions [22][23][24][25]. At the same time, CAES may refer to computer-aided engineering work or its tools for the prior examination, design, manufacturing, and process design of construction methods and products.…”

Section: Computer-aided Engineering System (Caes)mentioning

confidence: 99%

“…Table 1 shows the physical characteristics of the water particles modeled by the MPSM, while Table 2 shows the physical characteristics of the sand particles modeled by the DEM. The MPSM parameters of water can be established by referring to the physical characteristics of water at a temperature of 20 • C [35], and the DEM parameters of the sand particles can be found by referring to the parameters used in previous studies [12,13,24,28,30,36,37]. Considering the time required for the calculation, the distance between the particles in the MPSM was set at 20 mm, and the particle size in the DEM was set at 20 mm.…”

Section: Mpsm-dem Coupled Caes Settingsmentioning

confidence: 99%

Numerical Simulation of the Liquefaction Phenomenon by MPSM-DEM Coupled CAES

Nakao

Inazumi

Takahashi³

et al. 2022

Sustainability

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The mechanism of liquefaction and the factors that cause liquefaction behavior have previously been examined and evaluated, both analytically and experimentally; construction including liquefaction countermeasures is being implemented, based on these findings. This study presents a theoretical visualization of the mechanism of liquefaction generation and evaluates the behavior of particles in the ground. Specifically, an MPSM-DEM coupled CAE system (CAES) is employed to view the events beneath the ground, modeled three-dimensionally when an external acceleration is applied to simulate seismic waves and reveals the behavior below the surface. The numerical simulation of the liquefaction phenomenon, as represented by an MPSM-DEM coupled CAES system, clearly showed the mechanism of liquefaction generation and contributed to the design and accountability of more economical and sustainable liquefaction countermeasures, regardless of the field of specialization.

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“…Computer-aided engineering (CAE) is an alternative technology for large-scale experiments, conducted in a room or in situ, using prototypes that have been prepared in a study as part of the development process of "manufacturing". In other words, CAE is a general term for technology that simulates and analyzes prototypes on a computer created by a computer-aided design (CAD) and so on, considering the site conditions [16][17][18][19]. At the same time, CAE may refer to computer-aided engineering work or its tools for the prior examination, design, manufacturing, and process design of construction methods and products.…”

Section: Computer-aided Engineering (Cae)mentioning

confidence: 99%

“…The possibility and validity of applying the MPS-CAE analysis to the ground and ground-improvement methods has been clarified by Inazumi et al [13,18,[20][21][22] and Nakao et al [23].…”

Section: Computer-aided Engineering (Cae)mentioning

confidence: 99%

Evaluation of Discharging Surplus Soils for Relative Stirred Deep Mixing Methods by MPS-CAE Analysis

Nakao

Inazumi

Takaue³

et al. 2021

Sustainability

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Most of the ground in Japan is soft, leading to great damage in the event of liquefaction. Various ground-improvement measures are being taken to suppress such damage. However, it is difficult to carry out ground-improvement work while checking the internal conditions of the ground during the construction. Therefore, a visible and measurable evaluation of the performance of the ground-improvement work was conducted in this study. The authors performed a simulation analysis of the relative stirred deep mixing method (RS-DMM), a kind of ground-improvement method, using a computer-aided engineering (CAE) analysis based on particle-based methods (PBMs). In the RS-DMM, the “displacement reduction type (DRT)” suppresses displacement during construction. Both the DRT and the normal type (NT) were simulated, and a visible and measurable evaluation was performed on the internal conditions during each construction, the quality of the improved body, and the displacement reduction performance. As an example of these results, it was possible to visually evaluate the discharge of surplus soil by the spiral rod attached to the stirring wing of the DRT. In addition, the authors succeeded in quantitatively showing that more surplus soil was discharged when the stirring wing of the DRT was used than when the stirring wing of the NT was used.

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Evaluation of effect of insertion of casing by rotation on existing piles

Cited by 15 publications

References 14 publications

Soil Behavior Modeling by MPS-Cae Simulation

Soil Behavior Modeling by MPS-Cae Simulation

Numerical Simulation of the Liquefaction Phenomenon by MPSM-DEM Coupled CAES

Evaluation of Discharging Surplus Soils for Relative Stirred Deep Mixing Methods by MPS-CAE Analysis

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