Numerical Analysis of Laterally Loaded Single Free-Headed Piles within Mechanically Stabilized Earth Walls

Jawad, Saif; Han, Jie

doi:10.1061/(asce)gm.1943-5622.0001989

Cited by 13 publications

(5 citation statements)

References 25 publications

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“…An elastic modulus of 25 MPa and a Poisson's ratio of 0.25 was used in accordance with the typical values and adjusted by numerical model calibration. The properties of the retained soil and bedrock used in the study by Jawad et al [10] are listed in Table 1.…”

Section: Constitutive Models and Interfacesmentioning

confidence: 99%

“…The elastic modulus of the geogrids was determined according to their strength at 2% strain, as the strain of the geogrids was less than 2% under the working conditions of the nonload-bearing MSE wall [5,11]. The tensile strength in the crossmachine direction was 1/10 that in the machine direction [10]. The thickness of the geotextile was assumed to be 1 mm, and the Poisson's ratio was assumed to be 0.33.…”

Section: Constitutive Models and Interfacesmentioning

confidence: 99%

“…An interaction coefficient C i of 0.6 (i.e., i = arctan (0.6•tan 38°) = 25.1°) was assigned to the geogridsoil interface [12], and a cohesion of 81 MPa was assigned to the geogrid-CMU interface to account for mechanical connection. Regarding the concrete-soil and concrete-bedrock interface, interaction coefficients Ci of 0.4 and 0.8 were used [10,13], respectively. The interface stiffness values used by Jawad et al [10] and Shen et al [13] are listed in Table 2.…”

Section: Constitutive Models and Interfacesmentioning

confidence: 99%

“…Regarding the concrete-soil and concrete-bedrock interface, interaction coefficients Ci of 0.4 and 0.8 were used [10,13], respectively. The interface stiffness values used by Jawad et al [10] and Shen et al [13] are listed in Table 2.…”

Section: Constitutive Models and Interfacesmentioning

confidence: 99%

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Numerical parametric study of embedded geosynthetic-reinforced soil abutment

Zuo,

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Three-dimensional numerical analysis was conducted to investigate the performance of embedded geosynthetic-reinforced soil abutments. The numerical model was validated using field-monitoring data. A parametric study was conducted to investigate the key factors affecting the performance of the embedded abutment under the working conditions, including the pile offset distance, pile diameter, pile spacing, and bridge load. The piles exhibited a retaining rather than a pushing effect in these cases due to the relatively high stiffness and negative skin friction of the piles, thus reducing the loads exerted on the facing wall. The lateral displacement of the facing wall significantly increased as the pile offset distance decreased mainly due to the reduced anchor length of the reinforcement and enhanced retaining effect of the piles. As the pile diameter increases, the deflection of the facing wall is constrained by factors such as increased bearing width, limited displacement, and enhanced retention effect of thepiles. This is an efficient way to increase the pile density near the abutment centerline to control thedeformation of the facing wall. An increase in the vertical bridge load resulted in a decrease in negative skin friction, leading to increased foundation settlement and lateral displacement of the facing wall.

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Section: Constitutive Models and Interfacesmentioning

confidence: 99%

Section: Constitutive Models and Interfacesmentioning

confidence: 99%

Section: Constitutive Models and Interfacesmentioning

confidence: 99%

Section: Constitutive Models and Interfacesmentioning

confidence: 99%

See 2 more Smart Citations

Numerical parametric study of embedded geosynthetic-reinforced soil abutment

Zuo,

2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…His results revealed that the increase of the stiffness in both directions increased the pile lateral load capacity and reduced the facing deflection. The numerical study conducted by Jawad and Han [33] investigated the effect of reinforcement stiffness on the lateral load capacities of various pile diameters. In his study, the piles were placed at the offset distance equal to two times the pile diameter behind the wall facing.…”

Section: Reinforcement Stiffnessmentioning

confidence: 99%

Recent Advances in Laterally-Loaded Piles within Mechanically-Stabilized Earth Walls

Jawad

Asce

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Pile foundations have been increasingly installed within mechanically-stabilized earth walls (MSE) on rocks or compressible soils to support structural loads. Integral abutment bridges, sound walls, and traffic signs are common examples of the structures supported by pile foundations installed within or behind MSE walls. These structures are often subjected to lateral loads resulting from earthquakes, traffic loads, wind loads, and/or thermal expansion and contraction of bridge girders. Typical approaches available to design MSE walls are limited to MSE walls without pile foundations present within reinforced fill. To minimize the interaction between piles and the MSE wall, designers often suggest to place the piles at a distance of six to eight times the pile diameter and/or isolate the piles from the MSE wall by using corrugated pipes. These suggested designs lead to increasing the cost of projects by increasing the length of bridge spans or the diameter of piles and requiring pile embedment. Recently, several studies have been conducted to understand the interaction between piles and MSE walls when the piles are constructed within and close to wall facing. This paper provides a literature review on full-scale tests, reduced-scale tests, and numerical studies of piles constructed within or behind MSE walls. The review will focus on the effects of three key influence factors on lateral capacities of laterally-loaded piles and facing deflections of MSE walls including the plie location behind the wall facing, the ratio of the reinforcement length to the wall height, and the stiffness of the reinforcement layer. This paper will also discuss the available approaches to estimate the forces in the reinforcement layers and the lateral earth pressures behind the MSE wall facing due to the laterally-loaded piles.

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A Bibliometric Review of Reinforced Soil Wall Research Topics

Malekmohammadi,

Damians

2024

Int. J. of Geosynth. and Ground Eng.

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Reinforced soil or mechanically stabilized earth (MSE) wall structures offer straightforward construction techniques as an alternative to conventional retaining earth walls. The benefits of MSE wall structures are their low cost, rapid construction, minimal ground occupation, and high tolerance for differential settlements. In the past, a vast amount of research has been conducted on this specific topic, but there is no state-of-the-art overview on the general reinforced soil walls subject. In this paper, a bibliometric review of MSE walls literature is carried out to provide multiple data points regarding the state-of-the-art in MSE wall publications. To present/demonstrate the main traditional applications, current utility, and last developments of MSE walls, a thematic/keyword cluster categorization is performed to catalog and organize the numerous applications analyzed and published in the last 4 decades. Furthermore, a discussion of MSE wall characteristics is conducted to assist researchers in expanding their understanding of potential future research areas.

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Numerical Analysis of Laterally Loaded Single Free-Headed Piles within Mechanically Stabilized Earth Walls

Cited by 13 publications

References 25 publications

Numerical parametric study of embedded geosynthetic-reinforced soil abutment

Numerical parametric study of embedded geosynthetic-reinforced soil abutment

Recent Advances in Laterally-Loaded Piles within Mechanically-Stabilized Earth Walls

A Bibliometric Review of Reinforced Soil Wall Research Topics

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