Probabilistic investigations on the elastic stiffness coefficients for suction caisson considering spatially varying soils

Cheng, Po; Hu, Yao; Yao, Kai; Fu, Yong; Liu, Yong

doi:10.1016/j.oceaneng.2023.116273

Cited by 9 publications

(1 citation statement)

References 46 publications

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“…Finite element analysis is widely used in geotechnical engineering [25][26][27][28][29][30], and the commercial finite element software COMSOL is used in this study. When conducting the three-dimensional modeling of the new pipe curtain freezing method, the width and height of the excavation area within the pipe curtain freezing pipe are 18.8 m × 21 m. The odd-numbered pipes are solid top pipes filled with concrete and arranged with circular freezing pipes; the even-numbered pipes are freezing pipes with irregular freezing pipes arranged inside.…”

Section: Geometric Model Mesh Division and Observation Path Layoutmentioning

confidence: 99%

Sensitivity Analysis of Different Factors in the New Pipe Curtain Freezing Method under Seepage Conditions

Hu,

Li,

Wang

et al. 2024

Applied Sciences

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This paper takes the freezing project of the North Arch Tunnel of the Hong Kong–Zhuhai–Macao Bridge as an example. Based on Darcy’s law and the theory of heat transfer in porous media, using the coupled module of the temperature field and seepage field in the COMSOL Multiphysics software, numerical simulations of the freezing reinforcement of the new pipe curtain freezing method are conducted to study the influence of different factors on this method under seepage conditions. The research shows that an increase in the groundwater flow velocity will affect the development of frozen soil curtains, prolonging the formation time of frozen soil curtains. A rise in the initial ground temperature will increase the time required for the formation of frozen soil curtains during the freezing process, resulting in a slight increase in the temperature of the final frozen soil curtains. With an increase in the salinity of the groundwater, the temperature at the temperature measurement point upstream of the freezing pipe increases, while the temperature at the temperature measurement point downstream of the freezing pipe decreases. The average temperature of the frozen soil curtain also increases with an increase in the salinity of the groundwater. This study is expected to provide a valuable reference for similar projects in the future.

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Section: Geometric Model Mesh Division and Observation Path Layoutmentioning

confidence: 99%

Sensitivity Analysis of Different Factors in the New Pipe Curtain Freezing Method under Seepage Conditions

Hu,

Li,

Wang

et al. 2024

Applied Sciences

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Refined implicit characterization of engineering geology with uncertainties: a divide-and-conquer tactic-based approach

Li,

Chen,

Liang

et al. 2024

Bull Eng Geol Environ

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In engineering geology, a reasonable assessment of the spatial distribution of uncertainty in a region is vital in guiding research, saving money, and shortening the period. However, the traditional modeling process requires a lot of manual interaction, and the uncertainty of the geological model cannot be accurately quantified and utilized. This paper proposes a novel implicit geological modeling and uncertainty analysis approach based on the triangular prism blocks, which is divided into data point acquisition, ensemble model with divide-and-conquer tactic (EMDCT), uncertainty analysis, and post-processing. By employing machine learning algorithms, the EMDCT gives superior results for implicit modeling. The sensitivity analysis of the prediction results is further evaluated via information entropy. According to the distribution of uncertainty, supplementary boreholes are selected as additional knowledge to retrain the local components of the model to enhance their performances. The implicit modeling method is applied to real hydraulic engineering problems by employing the EMDCT, and the proposed model has obvious advantages in the implicit geological characterization. The overall accuracy in the working area with sparse boreholes reaches 0.922, which is 0.013 higher than the traditional method. By evaluating the distribution of uncertainty, an accuracy of 0.962 can be achieved, which is equivalent to reducing 10 boreholes.

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Large-deformation study of T-bar penetration in spatially variable sediments

Liu,

Cheng,

Luo

et al. 2024

Applied Ocean Research

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Probabilistic investigations on the elastic stiffness coefficients for suction caisson considering spatially varying soils

Cited by 9 publications

References 46 publications

Sensitivity Analysis of Different Factors in the New Pipe Curtain Freezing Method under Seepage Conditions

Sensitivity Analysis of Different Factors in the New Pipe Curtain Freezing Method under Seepage Conditions

Refined implicit characterization of engineering geology with uncertainties: a divide-and-conquer tactic-based approach

Large-deformation study of T-bar penetration in spatially variable sediments

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