Use of Micropiles for Foundations of Transportation Structures Final Report

Seo, Hoyoung; Prezzi, Mônica

doi:10.5703/1288284314318

Cited by 10 publications

(2 citation statements)

References 37 publications

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“…The contact behaviors at the pile-soil surface include load transfer mechanisms both in the normal and tangent direction. In this research a surface-to-surface contact with finite-sliding formulation was used to define the interaction between the micropile sides and the surrounding soil, the soil is assumed to be slave surface and the pile is master surface [13]. The friction along the pile shaft was found using Coulomb's friction law, [9], and [14].…”

Section: Interaction Between Micropiles and Soilsmentioning

confidence: 99%

Favorable of grouted micropiles for the load transfer in weak sandy soils

Al-Obaidi

Al-Karawi

2018

MATEC Web Conf.

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Micropiles are defined as small diameter piles, implemented as a cast-in-place replacement or injected grout. Generally assumed with a diameter less than 300 mm. The axial capacity of micropiles develops primarily through the bond between gravity grouted (Type A) or post grouted (Type B, C or D) and soil in bonded zone of the micropile. Because of this, micropiles are useful in a variety of applications. Micropiles (Type D) indicate a two-step process of grouting, neat cement grout is placed under gravity head, then, additional grout is injected via a sleeved grout pipe at a specified pressure. In this research, a numerical model was developed to simulate the properties of the micropile (Type D), in addition to micropile (Type A). A general finite element program ABAQUS was selected for the numerical analysis method and for generating the solution. The parameters that affect the load transfer and ultimate capacity of the micropile foundation, which includes micropile length, diameter, grouted length and weak soil type, were investigated. The main results show that the pressure grouting micropile provides better load transfer mechanism as it makes surrounding soil strength to be fully mobilized upon axial loading. Micropiles (Type D)show more favorable in a capacity where the increment range is up to 50% as compared with groundgrouted micropiles (Type A). In addition, the results indicate that the ultimate capacity of micropile increases as the grouted length increases.

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Section: Interaction Between Micropiles and Soilsmentioning

confidence: 99%

Favorable of grouted micropiles for the load transfer in weak sandy soils

Al-Obaidi

Al-Karawi

2018

MATEC Web Conf.

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“…The project location was in a karstic saline zone, which has been the reason for chosen the solution foundations on micropiles, with anticorrosion protection of the elements [1]. Having the in situ tests result, obtained for micropiles in Slanic, the author tried to validate the mathematical model created through an easy spread-sheet obtained as the results of the research by Seo and Prezzi (2008) [2]. Then it was made a comparasion between the micropiles executed in Slanic and the similar one executed in Puerto-Rico.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modelling for Micropiles Embedded in Salt Rock

Rădan

Radulescu

Oancea³

2016

Mathematical Modelling in Civil Engineering

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This study presents the results of the mathematical modelling for the micropiles foundation of an investement objective located in Slanic, Prahova county. Three computing models were created and analyzed with software, based on Finite Element Method. With Plaxis 2D model was analyzed the isolated micropile and the three-dimensional analysis was made with Plaxis 3D model, for group of micropiles. For the micropiles foundation was used Midas GTS-NX model. The mathematical models were calibrated based with the in-situ tests results for axially loaded micropiles, embedded in salt rock. The paper presents the results obtained with the three software, the calibration and validation models.

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On the Use and Interpretation of In Situ Load Tests in Weak Rock Masses

Asem

Gardoni

2021

Rock Mech Rock Eng

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Use of Micropiles for Foundations of Transportation Structures Final Report

Cited by 10 publications

References 37 publications

Favorable of grouted micropiles for the load transfer in weak sandy soils

Favorable of grouted micropiles for the load transfer in weak sandy soils

Mathematical Modelling for Micropiles Embedded in Salt Rock

On the Use and Interpretation of In Situ Load Tests in Weak Rock Masses

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