A new installation technology of large diameter deeply-buried caissons: Practical application and observed performance

Lai, Fachun; Liu, Songyu; Li, Yaoliang; Sun, Yanxiao

doi:10.1016/j.tust.2022.104507

Cited by 14 publications

(4 citation statements)

References 44 publications

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“…CEL approach for large deformation problems 3D large deformation finite-element (LDFE) problems have been widely studied using the Coupled-Eulerian-Lagrangian approach incorporated in the commercial finite element program ABAQUS/Explicit. The feasibility and applicability of the CEL approach have been also proven for various geotechnical penetration problems such as the installations of piles (Fan et al, 2021;Li et al, 2021), caissons (Lai et al, 2020(Lai et al, , 2021(Lai et al, , 2022a(Lai et al, , 2022bHarireche et al, 2021), spudcans (Li et al, 2018) and CPTs (Wang et al, 2019;Gavin et al, 2021), etc.…”

Section: Numerical Modeling Detailsmentioning

confidence: 99%

Numerical analyses of energy balance and installation mechanisms of large-diameter tapered monopiles by impact driving

et al. 2022

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Section: Numerical Modeling Detailsmentioning

confidence: 99%

Numerical analyses of energy balance and installation mechanisms of large-diameter tapered monopiles by impact driving

et al. 2022

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“…This technique minimizes disturbances to surrounding structures and buildings. Many projects opt for this type of foundation, including underground storage and attenuation tanks, pumping stations, bridge piers as well as launch and reception shafts for tunnel boring machines [2][3][4][5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

Spatial monitoring of open caissons via computervision approach

Wang,

Li,

Zhang

2024

Preprint

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Monitoring of the open caissons during the sinking process is a crucial aspect in construction projects. Traditional methods such as Electric Level have limitations in providing continuous monitoring throughout the sinking process. To address this challenge, this paper introduces a novel approach utilizing computer vision and linear intensity change model for 3D reconstruction of open caissons and real-time monitoring of the caisson sinking. In this proposed approach, RGB-D camera was firstly calibrated for the intrinsic and extrinsic parameters. Then 3D coordinates of the open caisson were obtained via the calibrated IR sensors of RGB-D camera. Subsequently, the spatial visual image of the open caisson for display was calculated using RGB sensors and the 3D coordinates. During sinking, multiple RGB sensors combined with a linear intensity change model were used for monitoring settlement displacement. The spatial visual image of the open caisson was updated with the data of the settlement and out-plane displacement. The feasibility and effectiveness of the proposed approach are validated by examples. This innovative monitoring solution has the potential to revolutionize the construction process in open caisson, ensuring timely detection of any deviations and facilitating proactive decision-making for optimal project outcomes.

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“…A fundamental and indispensable postulation for both theories is that a triangular thrust wedge would be developed in semi-infinite frictional backfills. However, when retaining walls are constructed near rock faces (Frydman and Keissar 1987;Fan and Fang 2010;Xie et al 2020) or existing stable structures [piles (Ni et al 2018;Shakeel and Ng 2018), basements (Lai et al 2022b, c), diaphragm walls (Chen et al 2017;Li et al 2017;Lai et al 2020bLai et al , 2021Lai et al , 2022a, etc. ], the width of retained backfills is limited (termed narrow backfills) (Fig.…”

Section: Introductionmentioning

confidence: 99%

Passive Earth Pressure in Narrow Cohesive-Frictional Backfills

Lai

Shiau

et al. 2023

Int. J. Geomech.

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A narrow backfill zone is formed when retaining walls are built near existing stabilized structures (e.g., rock faces). In such circumstances, the classical passive earth pressure coefficient is no longer applicable, and a correction factor is required for the design. This paper aims to develop analytical solutions for estimating the passive earth pressure problem of narrow cohesive-frictional backfills behind retaining walls. The novel arched differential element method considers both effects of the horizontal shear stress in backfills and the soil arching, and it is employed to estimate the passive earth pressure distribution along with wall depth. The solutions are compared against those published experimental data, analytical approaches, and finite-element limit analysis solutions. The factors influencing the distribution of passive earth pressure are also undertaken using a series of parametric studies. To implement the derived solutions into a routine design, a modified practical design equation is presented following the standard Coulomb's solutions. This work provides a theoretical guideline for the initial design of retaining walls with narrow soils, and it should be of great interest to practitioners.

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A new installation technology of large diameter deeply-buried caissons: Practical application and observed performance

Cited by 14 publications

References 44 publications

Numerical analyses of energy balance and installation mechanisms of large-diameter tapered monopiles by impact driving

Numerical analyses of energy balance and installation mechanisms of large-diameter tapered monopiles by impact driving

Spatial monitoring of open caissons via computervision approach

Passive Earth Pressure in Narrow Cohesive-Frictional Backfills

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