Horizontal capacity of single piles: an extension of Broms’ theory for c-ϕ soils

Cecconi, Manuela; Pane, Vincenzo; Vecchietti, Alessia; Bellavita, Diego

doi:10.1016/j.sandf.2019.01.007

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…is the passive earth pressure coefficient where the factor of 3 accounts for threedimensional effects. Following Cecconi et al [13], the three-dimensional passive earth pressure coefficient for the cohesive term is taken equal to 9 √ 𝐾 𝑝 .…”

Section: Including Apparent Cohesion Into Broms Methodsmentioning

confidence: 99%

An analytical method to evaluate the capacity of laterally loaded piles in unsaturated soils

2023

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The growing pressures of climate change, increased usage and unprecedented geo-hazards impose a modification in the way civil engineering structures are designed and constructed. This isparticularly true for geotechnical works, which are very sensitive to changes of environmental conditions. For instance, the response of a pile under lateral loading is strongly influenced by the stiffness and strength of the first few metres of soil below the surface, which are often partly saturated. To consider this effect, the present paper describes an analytical method, which extends the well-known Broms approach to predict thelateral capacity of piles in unsaturated soils. More specifically, the proposed method considers the combined effects of the position of the ground water table and the extra strength of the partially saturated soil above it. Compared to Broms approach, the solution introduces four additional non-dimensional parameters that relate the soil-water retention behaviour to the geometry of the pile. The method provides a direct evaluation of the lateral pile capacity in partly saturated soils, which can be used as a basis for more accurate design.

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Section: Including Apparent Cohesion Into Broms Methodsmentioning

confidence: 99%

An analytical method to evaluate the capacity of laterally loaded piles in unsaturated soils

2023

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“…Designing methods for IAB assume that soil spring exhibits equal linear response despite the widely-known fact that it is nonlinear and hysteretic. Current soil resistance methods to predict soil resistance is, API methods, Hansen's and Broms approaches offer varying predictions of soil resistance for the similar earth environments [88][89][90][91]. Of these ways, the foremost refined square measure API ways utilized by the industry in nonlinear soil modeling for lateral pile loading.…”

Section: Api Design Methodsmentioning

confidence: 99%

A Review: Study of Integral Abutment Bridge with Consideration of Soil-Structure Interaction

Naji¹,

Firoozi

Firoozi³

2020

Lat. Am. j. solids struct.

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Bridges are one of the most critical parts of transportation networks that may suffer damages against earthquakes. Also, seismic responses of most bridges are significantly influenced by soil-structure interaction effects. Taking out expansion joints in the bridges may cause many difficulties in design and analysis due to the complexity of soil-structure interaction and nonlinear behavior. The secondary loads on an IAB include seismic load, temperature variation, creep, shrinkage, backfill pressure on back wall and abutment, all of which cause superstructure length and stress variations in girder changes. The purpose of this study is to recognize the most effective parameters of analysis IABs. Findings show that the backfill material behind the IABs has a significant effect on the performance of IABs. Using a compressible material behind the abutments would enhance the in-service performance of IABs. Finally, behaviour of abutment may be greatly affected by thermal load and soil pressure. Thermal expansion coefficient significantly influences girder axial force, girder bending moment, and pile head/abutment displacement.

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“…Up to now, a number of experimental and theoretical researches on the horizontal bearing characteristics of piles in silica sand (Guo 2006(Guo , 2013Lin et al 2015;Matlock 1970;Reese et al 1974) and clay (Cecconi et al 2019;Ding et al 2020b;Hong et al 2017;Huang et al 2017) have been conducted, but the data concerning the coral materials is very limited (Dyson and Randolph 2001;Guo and Zhu 2005;Novello 1999;Wesselink et al 1988;Williams et al 1988). Nevertheless, the unique mechanical properties of coral sand have not been taken into account, and the derived load-transfer curves are not cast in a general form that would allow an extension to different conditions.…”

Section: Introductionmentioning

confidence: 99%

Study on horizontal bearing characteristics of pile foundations in coral sand

et al. 2021

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This paper presents the horizontal bearing characteristics of piles in coral sand and silica sand from comparative experimental studies. A total of 6 model piles with different diameters are tested. The horizontal bearing capacity, deformation characteristic, bending moment, p-y curve, the change in soil horizontal pressure, as well as the particle breakage behaviour of coral sand are investigated. The results show that, in coral sand foundation, the horizontal bearing capacities of piles and the increments of soil horizontal pressures are obviously greater than those in silica sand. Accordingly, the lateral displacement, the rotation of pile head, the bending moment and the corresponding distribution depth in coral sand are significantly smaller than that in silica sand. The p-y curves indicate that the horizontal stiffness of coral sand is greater than that of silica sand. Remarkably, the breakage behaviour of coral sand is mainly distributed in the range of 10 times pile diameter depth and 5 times pile diameter width on the side where the sand is squeezed by pile. Furthermore, in coral sand, the influence of pile size is more pronounced, the squeezing force generated by pile spread farther and its influence range is larger compared to those in silica sand.

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Horizontal capacity of single piles: an extension of Broms’ theory for c-ϕ soils

Cited by 8 publications

References 14 publications

An analytical method to evaluate the capacity of laterally loaded piles in unsaturated soils

An analytical method to evaluate the capacity of laterally loaded piles in unsaturated soils

A Review: Study of Integral Abutment Bridge with Consideration of Soil-Structure Interaction

Study on horizontal bearing characteristics of pile foundations in coral sand

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