Physical modeling of the long-term behavior of integral abutment bridge backfill reinforced with tire-rubber

Zadehmohamad, Mehdi; Bazaz, Jafar Bolouri; Riahipour, Ramin; Farhangi, Visar

doi:10.1186/s40703-021-00163-2

Cited by 15 publications

(9 citation statements)

References 53 publications

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“…The effective length was defined as the pile length below the excavation surface. The soil used in the model test is sandy silt with a dry density of 1.53 g/cm 3 . The soil mechanical and physical properties are summarized in Table 3.…”

Section: Case Fourmentioning

confidence: 99%

“…The pile uplift capacity before and after excavation was 17,000 kN and 12,000 kN, respectively, showing a 29% capacity loss caused by the excavation. The soil used in the model test is sandy silt with a dry density of 1.53 g/cm 3 . The soil mechanical and physical properties are summarized in Table 3.…”

Section: Case Fourmentioning

confidence: 99%

“…With the development of urbanization around the world, the demand for extensive underground space utilization has increased dramatically in recent years. To meet these demands, deep excavations are widely used for the construction of geotechnical infrastructures such as tunnels [1], basements [2], bridge foundations [3], and launch shafts for piping [4]. Piles are often installed beneath these infrastructures to bear the uplift or compression loads.…”

Section: Introductionmentioning

confidence: 99%

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Analysis on Response of a Single Pile Subjected to Tension Load Considering Excavation Effects

Liu

et al. 2022

Applied Sciences

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With the development of urbanization, numerous excavations are carried out to facilitate the development of underground space. As a support for tunnel structures, uplift piles are often installed prior to tunnel excavation. The excavation inevitably causes disturbance to the soil below the excavation surface, changing the soil’s mechanical behavior and stress state significantly. However, there is still a lack of a method to evaluate the change in pile capacity due to excavation. This paper proposes a semi-analytical approach for estimating the change in load-settlement behavior of an uplift pile considering the effects of excavation. A hyperbolic model was adopted to simulate the nonlinear interaction of the pile–soil interface. The nonlinear shear-induced soil displacement outside the pile–soil interface is introduced to obtain a more realistic load-displacement behavior of the uplift pile. An effective iterative program was implemented based on the proposed semi-analytical approach. The comparisons between the results from the proposed methods, well-documented field tests, centrifuge tests, and other analytical methods showed that the proposed approach is suitable for analyzing an uplift pile considering excavation effects. A parametric study was conducted to investigate the effects of main soil properties on the pile capacity loss caused by excavation. The results showed that the soil friction angle and the ratio of the excavation depth to the pile effective length have a great influence on the loss in pile uplift capacity caused by excavation. However, the loss of pile uplift capacity caused by excavation is not affected by the soil’s shear modulus or Poisson’s ratio.

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Section: Case Fourmentioning

confidence: 99%

Section: Case Fourmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis on Response of a Single Pile Subjected to Tension Load Considering Excavation Effects

Liu

et al. 2022

Applied Sciences

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“…Frontiers in Built Environment frontiersin.org inclusion (e.g., EPS foam, tire shred, or tire-derived aggregates) has been placed between the abutment and the backfill to reduce the horizontal earth pressures behind the abutment and the pile moment (Hoppe, 2005;Caristo et al, 2018;Duda and Siwowski, 2020;Liu et al, 2021a;Zadehmohamad et al, 2021). Arsoy (2000) indicated that flexible piles were beneficial to prevent damages of pileabutment connections.…”

Section: Figurementioning

confidence: 99%

Integral bridge abutments in response to seasonal temperature changes: State of knowledge and recent advances

Líu

Han

Parsons

2022

Front. Built Environ.

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Expansion and contraction of integral abutment bridges due to temperature changes force integral bridge abutments (IBAs) to move toward and away from the backfill, thus increasing horizontal earth pressures behind the abutments and inducing bending moments on pile foundations. This paper presents the state of knowledge and recent advances in understanding the behavior of IBAs in response to temperature changes including abutment movement, pile response, and horizontal earth pressure behind the abutment, examines the effect of bridge skew on the behavior, and discusses possible measures to mitigate temperature change-induced problems for IBAs. Field data show that both bending moments of piles near the bottom of abutments and axial loads of piles fluctuated with temperature. Redistribution of dead loads among bridge components due to planar temperature gradients and earth pressure changes behind the abutment contributed to axial load fluctuations in piles. Magnitude and distribution of horizontal earth pressures behind the abutment depend on factors such as abutment movement and abutment movement mode. Most of the current design methods overestimated the horizontal earth pressures at the bottom of the abutment during bridge expansion. Compressible inclusions placed behind the abutment, geosynthetic-reinforced backfill, and lightweight backfill in place of typical aggregate backfill are helpful to reduce horizontal earth pressures behind the abutment at high temperatures and temperature change-induced backfill settlements.

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“…If bridges are regularly inspected and repaired, disasters can be avoided. The use of renewable materials such as tire rubber [2] in bridge damage can effectively improve its performance. Therefore, bridge damage detection and assessment have gradually become a popular research direction.…”

Section: Introductionmentioning

confidence: 99%

Damage Detection of Continuous Beam Bridge Based on Maximum Successful Approximation Approach of Wavelet Coefficients of Vehicle Response

Sun

2022

Applied Sciences

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In view of problems such as closed traffic, the large number of sensors required, and the labor-intensive and time-consuming nature of previous bridge detection, this paper analyzes the dynamic response of the vehicle body of the continuous girder bridge under the action of vehicle load. Based on theoretical analysis and formula derivation, a new method of bridge damage detection based on coupled vehicle–bridge vibration is conceived. This method can accurately identify the location of bridge damage and approximately estimate the degree of bridge damage. The method is as follows: Taking the continuous beam bridge as an example, first, use the tractor inspection vehicle model to drive over the continuous beam bridge before and after the damage, and collect the acceleration response of the vehicle body. Then, the acceleration response difference is transformed by wavelet transform. Furthermore, perform the innovative use of the maximum successive approximation approach to process wavelet transform coefficients, which can identify the location of the bridge damage. Additionally, study the impact of vehicle speed, vehicle weight, road surface roughness, and noise on this damage detection method. In addition, a method for judging bridge damage degree based on wavelet transform coefficients is proposed, and the judgment error basically meets the requirements.

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Physical modeling of the long-term behavior of integral abutment bridge backfill reinforced with tire-rubber

Cited by 15 publications

References 53 publications

Analysis on Response of a Single Pile Subjected to Tension Load Considering Excavation Effects

Analysis on Response of a Single Pile Subjected to Tension Load Considering Excavation Effects

Integral bridge abutments in response to seasonal temperature changes: State of knowledge and recent advances

Damage Detection of Continuous Beam Bridge Based on Maximum Successful Approximation Approach of Wavelet Coefficients of Vehicle Response

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