Numerical modeling of interaction between dip-slip fault and shallow foundation

Baziar, Mohammad Hassan; Nabizadeh, Ali; Jabbary, Masoud

doi:10.1007/s10518-014-9690-1

Cited by 30 publications

(4 citation statements)

References 21 publications

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“…Zhang et al [13] used numerical simulation methods, combined with on-site measured data, to systematically study the deformation and stress characteristics of steel sheet piles during the construction of deep foundation pit cofferdams for a large-span railway arch bridge project in an earthquake fault zone. Baziar et al [14] studied the interaction between shallow foundations and reinforced soil under normal and reverse faults, and verified the accuracy of numerical simulation results through experiments conducted at the University of Dundee and Waseda University. Liu et al [15][16][17] studied the deformation of the strata, tunnel strain, and failure characteristics caused by a 75° reverse fault through model tests.…”

Section: Introductionmentioning

confidence: 88%

Study on the Deformation Effects of Foundation Pit Retaining Piles in the Influence Zone of the Footwall Affected by Reverse Fault

Niu,

Wang,

2023

Preprint

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In order to investigate the deformation characteristics of the retaining piles in the footwall affected by reverse fault, this study focuses on a case study of a foundation pit project in Shenzhen City, using numerical simulation methods. By analyzing the deformation characteristics of the retaining piles under reverse fault and investigating the influence of different fault slip amounts, dip angles, and positions on the pile deformation, sensitivity analysis and orthogonal experiments of fault parameters were conducted. The research results show that the deformation of the retaining piles under reverse fault exhibits an increasing trend, with the center of gravity shifting upward. Regarding the deformation impact, the upper part of the pile shows significantly larger deformation than the lower part, especially at the pile top. The overall deformation of the pile exhibits an approximate spoon-shaped curve, with the maximum deformation occurring in the middle to upper part of the foundation pit. The deformation of the pile is directly proportional to the fault slip amount and dip angle, while it is inversely proportional to the distance from the fault to the pit. Furthermore, the maximum deformation rate r(ΔZmax/Δ) increases non-linearly with increasing fault slip amount and dip angle, and decreases non-linearly with increasing distance from the fault to the foundation pit. Through sensitivity analysis of fault slip amount, dip angle, and position on the maximum deformation of the retaining pile, it is found that the dip angle has the greatest influence on deformation, followed by the slip amount, while the fault position has the least influence. By fitting the data from 64 orthogonal experiments, a good linear relationship is established between the maximum deformation Uhm of the retaining pile and the index η($\frac{{\theta \pi T}}{{{{180}^^\circ }S}}$ ). Furthermore, a predictive model is developed for the maximum deformation of the retaining pile in the influence zone of the footwall affected by reverse fault. This study provides valuable references for controlling deformations in foundation pit projects in reverse fault areas and holds significant importance for rational design and construction. The research findings contribute to reducing geological hazards, ensuring engineering safety, and promoting the sustainable development of foundation pit projects. Moreover, these contributions play a positive role in minimizing environmental impacts, resource consumption, and advancing the sustainability of engineering practices.

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Section: Introductionmentioning

confidence: 88%

Study on the Deformation Effects of Foundation Pit Retaining Piles in the Influence Zone of the Footwall Affected by Reverse Fault

Niu,

Wang,

2023

Preprint

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“…Lei et al 15 conducted a numerical simulation of fault slip instability under the influence of horizontal structural stress using the 21,221 working face in the Yima Coalfield as the engineering background. They studied the evolution characteristics of the displacement field of a fault structure with a dip angle of 75° under mining disturbance.Baziar et al 16 studied the interaction between shallow foundations and reinforced soil under normal and reverse faults, and verified the accuracy of numerical simulation results through experiments conducted at the University of Dundee and Waseda University. Liu et al [17][18][19] studied the deformation of the strata, tunnel strain, and failure characteristics caused by a 75° reverse fault through model tests.…”

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confidence: 88%

Study on the influence of reverse faulting on deformation of foundation pit retaining piles

Niu,

Wang,

2023

Sci Rep

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The mechanical properties of soil in fault-fracture zone areas are diverse and complex. Deep excavation projects often encounter adverse geological conditions such as reverse faulting, which can lead to surface subsidence and collapses, posing significant challenges to excavation safety. Currently, there is limited research in the field of deep excavation engineering that analyzes the influence of reverse faulting on the deformation of retaining piles, and the existing research methods are not systematic enough. Therefore, this study aims to investigate the characteristics of how reverse faulting affects the deformation of retaining piles in deep excavation projects. Various research methods were employed, including numerical simulation, on-site monitoring, and orthogonal experiments, using a deep excavation project in Shenzhen as a case study. The results of the study indicate that reverse faulting exacerbates the deformation of retaining piles, causing the trend of increased deformation to shift upward. The upper part of the pile is significantly more affected than the lower part, and the overall deformation of the pile exhibits an approximate spoon-shaped curve distribution, with the maximum deformation occurring in the upper-middle section of the excavation. Under the influence of reverse faulting, the deformation of retaining piles is positively correlated with fault slip distance and fault dip angle, while it is negatively correlated with fault position. The growth rate of the maximum deformation of retaining piles, denoted as r(ΔZmax/Δ), increases approximately logarithmically with increasing fault slip distance and exponentially with increasing fault dip angle, but decreases approximately logarithmically with increasing distance from the fault to the excavation. An analysis of the sensitivity of fault slip distance, fault dip angle, and fault position to the maximum deformation of retaining piles was conducted. It was determined that the fault dip angle has the highest sensitivity, followed by fault slip distance, while fault position has the lowest sensitivity. Based on the fitting of 64 sets of orthogonal experimental data, a good linear relationship was established between the maximum deformation of retaining piles (Uhm) and the indicator η($$\theta \pi T/180^{^\circ } S$$ θ π T / 180 ∘ S ), leading to the development of a predictive model for the maximum deformation of retaining piles under the influence of reverse faulting. These research findings provide valuable insights and references for similar engineering projects.

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“…Johansson & Konagai, 2004, 2007Bransby et al, 2008a, b;Ahmed & Bransby, 2009;Loli et al, 2012;Rasouli & Fatahi, 2019;Agalianos et al 2020;Tsatsis et al, 2019) along with numerical modeling tests (e.g. Yilmaz & Paolucci, 2007;Lin et al, 2007;Anastasopoulos et al, 2007;Loukidis et al, 2009;Baziar et al, 2012;Anastasopoulos et al, 2013;Oettle & Bray, 2013;Lee et al, 2012;Baziar et al, 2015;Tsai et al, 2015;Mortazavi Zanjani & Soroush, 2019;Thebian et al, 2018;Ghadimi Chermahini & Tahghighi, 2019). General findings include the realization that both normal and reverse fault propagations through soil is a progressive event, and the final surface emergence of the fault rupture is dependent on soil layer depth, soil properties, dip angle and fault mode.…”

Section: Introductionmentioning

confidence: 99%

Centrifuge modeling of normal faulting and underground tunnel in sandy soil deposit

Nabizadeh¹,

Mojtahedi²

2021

S&R

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Earthquakes of large magnitudes cause fault ruptures propagation in soil layers and lead to interactions with subsurface and surface structures. The emergence of fault ruptures on or adjacent to the position of existing tunnels cause significant damage to the tunnels. The objective of this paper is to study the interaction of an embedded tunnel within a soil layer and the soil deformations imposed upon by normal faulting. A centrifuge modeling under 80-g acceleration was conducted to investigate the rupture propagation pattern for different relative tunnel positions. Compared with the free field condition, due to tunnel and normal fault rupture interactions, focused on soil relative density and tunnel rigidity in this research, found that they can dramatically modify the rupture path depending on the tunnel position relative to the fault tip. The tunnel diverts the rupture path to its sides. This study presents the normal fault-tunnel interaction with the tunnel axis parallel to the normal fault line, to examine the changes that take place in fault rupture plane locations, the vertical displacement of the ground surface with tunnel presence and the effect of tunnel rigidity and soil density on fault tunnel interaction.

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Numerical modeling of interaction between dip-slip fault and shallow foundation

Cited by 30 publications

References 21 publications

Study on the Deformation Effects of Foundation Pit Retaining Piles in the Influence Zone of the Footwall Affected by Reverse Fault

Study on the Deformation Effects of Foundation Pit Retaining Piles in the Influence Zone of the Footwall Affected by Reverse Fault

Study on the influence of reverse faulting on deformation of foundation pit retaining piles

Centrifuge modeling of normal faulting and underground tunnel in sandy soil deposit

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