Simplified Analytical Solutions for Tunnel Settlement Induced by Axially Loading Single Pile and Pile Group

Wang, Yixian; Liu, Jian; Guo, Panpan; Zhang, Wei; Lin, Hang; Zhao, Yanlin; Ou, Qiang

doi:10.1061/(asce)em.1943-7889.0002035

Cited by 17 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The numerical models in the three-dimensional DEM-FEM simulations had the same pipe size, slope angle, and pulling direction as the model tests conducted by Gao et al [3]. Granular soil is suited for simulation using DEM, while solid structures are suited for continuous numerical simulations [40][41][42][43][44][45]. As in previous DEM-FEM coupling research [33], commercial DEM-FEM softwares were used in this study.…”

Section: Methodology Of Coupled Dem-femmentioning

confidence: 99%

Micromechanical Analysis of Lateral Pipe–Soil Interaction Instability on Sloping Sandy Seabeds

Peng,

2024

JMSE

View full text Add to dashboard Cite

The micromechanical mechanism of pipe instability under lateral force actions on sloping sandy seabeds is unclear. This study investigated the effects of slope angle and instability direction (upslope or downslope) on pipe–soil interaction instability for freely laid and anti-rolling pipes using coupled discrete element method and finite element method (DEM–FEM) simulations. The numerical results were analyzed at both macro- and microscales and compared with the experimental results. The findings revealed that the ultimate drag force on anti-rolling pipes increased with slope angle and was significantly larger than that on freely laid pipes for both downslope and upslope instabilities. Additionally, the rotation-induced upward traction force was proved to be the essential reason for the smaller soil deformation around freely laid pipes. Moreover, the shape differences in the motion trajectories of pipes were successfully explained by variations in the soil supporting force distributions under different slope conditions. Additionally, synchronous movement between the pipe and adjacent particles was identified as the underlying mechanism for the reduced particle collision and shear wear on pipe surfaces under a high interface coefficient. Furthermore, an investigation of particle-scale behaviors revealed conclusive mechanistic patterns of pipe–soil interaction instability under different slope conditions. This study could be useful for the design of pipelines in marine pipeline engineering.

show abstract

Section: Methodology Of Coupled Dem-femmentioning

confidence: 99%

Micromechanical Analysis of Lateral Pipe–Soil Interaction Instability on Sloping Sandy Seabeds

Peng,

2024

JMSE

View full text Add to dashboard Cite

show abstract

“…Engineers have been facing intractable settlement behaviors [35]. Wang et al [36] established a mechanical model and solved it analytically, and in order to obtain the analytical solution, some unnecessary assumptions had to be made, thus rendering the model to be mainly of mathematical interest. Pichler, et al [37] gave a thermo-chemomechanical assessment to improve the tunneling process.…”

Section: Dimensional Analysis Methodsmentioning

confidence: 99%

Fractal Space Based Dimensionless Analysis of the Surface Settlement Induced by the Shield Tunneling

Mei,

Tian,

et al. 2023

FU Mech Eng

View full text Add to dashboard Cite

The surface settlement during the tunneling process is becoming increasingly difficult to forecast as its surroundings become more and more erratic, and the maximal surface settlement raises risks posed suddenly by various uncertain factors. This paper proposes a novel approach to prediction of the surface settlement and analyzes the stability of tunnel construction. The dimensionless analysis and Buckingham’s π-theorem are adopted for this purpose, and some useful dimensionless quantities are found, which can be used to determine the surface settlement’s main properties. In this manner, the paper offers new ways of predicting surface settlement in various cases, and it sheds a new light on the tunnel’s design and safety monitoring.

show abstract

“…In the site, there is a 6-meter tunnel in diameter passing through the whole site along the length direction. At present, spray anchor support is widely used in tunnel support [24][25][26], the change of the axial force of the anchor rod can reflect the stability of the tunnel. In order to accurately analyze the influence of pit excavation on adjacent existing tunnels, it is necessary to have a statistical analysis about the change of the axial force of the anchor rod [27,28].…”

Section: Establishment Of Numerical Calculation Modelmentioning

confidence: 99%

Interactions of Foundation Pit on the Underlying Adjacent Existing Underground Structures

Liu

Liu³

et al. 2022

Geofluids

View full text Add to dashboard Cite

The influence of foundation pit excavation on deformation and stability of the supporting structure of underlying adjacent existing tunnel is a comprehensive geotechnical engineering problem, including unloading effect of foundation pit excavation and the coupling effect of deformation of the tunnel surrounding rock and supporting structure. Using numerical calculation methods, this paper changes the different excavation depths and widths of foundation pit and discusses the evolution law about force and deformation of tunnel supporting structure, and the changing relationship of the axial force of tunnel anchor with the distance between foundation pit and tunnel is obtained and compares the influence of different excavation way of foundation pit on the axial force of anchor rod near the existing tunnel. It is found that with the increase of distance between foundation pit and tunnel, the axial force of anchor rod at the top of tunnel under the foundation pit entirely symbolizes a trend of increases first and then decreases, the axial force of the leftmost anchor rod changes from pressure to tension, then decreases gradually. When the foundation pit depth increases, the axial force of the anchor rod at the top of the tunnel increases, the axial force of the leftmost anchor rod decreases, and the width of foundation pit absolutely has little effect on the axial force of the leftmost and the top tunnel.

show abstract

Simplified Analytical Solutions for Tunnel Settlement Induced by Axially Loading Single Pile and Pile Group

Cited by 17 publications

References 23 publications

Micromechanical Analysis of Lateral Pipe–Soil Interaction Instability on Sloping Sandy Seabeds

Micromechanical Analysis of Lateral Pipe–Soil Interaction Instability on Sloping Sandy Seabeds

Fractal Space Based Dimensionless Analysis of the Surface Settlement Induced by the Shield Tunneling

Interactions of Foundation Pit on the Underlying Adjacent Existing Underground Structures

Contact Info

Product

Resources

About