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414337

COMPARATIVE STUDY ON THE PERFORMANCE OF TYPE A AND TYPE B MICROPILED SYSTEMS IN SANDY SOIL UNDER VERTICAL LOADS FOR OPTIMIZING BEARING CAPACITIES

Article

Last updated: 09 Mar 2025

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Abstract

Micropiles are small-diameter drilled grouted piles. The grouting technique affects the connection between the grout and the surrounding earth. According to FHWA 2005, the most popular varieties of these techniques are Types A and B. For experimental work, these methods are the most appropriate. With an emphasis on the impact of the water-to-cement (W/C) and slenderness ratios (L/D) on performance, this study compares the bear-ing capacity behavior of Type A and Type B micropiles in sandy soil under compression loads. Also, a mathematical model was developed to predict pile load capacity based on settlement (δ), L/D ratio, and W/C ratio, providing a practical tool for optimizing pile de-sign. This research emphasizes the importance of geometric properties and grout compo-sition in enhancing micropile efficiency under various loading conditions. Based on the present study on Type A, experimental results show a load capacity (Q) reaching 6082 N at settlement (δ) of 5.08 mm for L/D=14 and W/C=0.3. Type B demonstrates higher ca-pacities, reaching up to 7848 N at a settlement of 3.8 mm under similar conditions. These findings indicate that Type A exhibits complex behavior influenced by slenderness and W/C ratios, while Type B shows a more direct relationship with settlement. The results provide valuable insights for optimizing micropile design and performance prediction.

DOI

10.21608/erj.2025.347167.1175

Keywords

Micropile, Single Pile, Pile capacity, Grout injection, Cohesionless Soil

Authors

First Name

Eslam

Last Name

Hassan

MiddleName

Ahmed

Affiliation

Civil, faculty of engineering - mataria branch , helwan university , Egypt, cairo

Email

eslam_treaka20008@yahoo.com

City

cairo

Orcid

-

First Name

Hussein

Last Name

Mostafa

MiddleName

-

Affiliation

Civil Engineering Department, Faculty of Engineering, Helwan University, Cairo, Egypt.

Email

hussain_moustafa@m-eng.helwan.edu.eg

City

-

Orcid

-

First Name

Wagdy

Last Name

Elbanna

MiddleName

Mohammed

Affiliation

Lecturer of Geotechnical Engineering, 15 May Institute in Cairo, Egypt.

Email

wagdyelbanna@icloud.com

City

Cairo

Orcid

-

First Name

Mohammed

Last Name

Rabie

MiddleName

Hasanin

Affiliation

Professor of Geotechnical Engineering, Helwan University, Cairo, Egypt.

Email

m.rabie@talk21.com

City

cairo

Orcid

-

Volume

184

Article Issue

2

Related Issue

54116

Issue Date

2025-03-01

Receive Date

2025-01-01

Publish Date

2025-03-01

Page Start

257

Page End

275

Print ISSN

1110-5615

Online ISSN

3062-5408

Link

https://erj.journals.ekb.eg/article_414337.html

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http://journals.ekb.eg?_action=service&article_code=414337

Order

414,337

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Original Article

Type Code

998

Publication Type

Journal

Publication Title

Engineering Research Journal

Publication Link

https://erj.journals.ekb.eg/

MainTitle

COMPARATIVE STUDY ON THE PERFORMANCE OF TYPE A AND TYPE B MICROPILED SYSTEMS IN SANDY SOIL UNDER VERTICAL LOADS FOR OPTIMIZING BEARING CAPACITIES

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Article

Created At

09 Mar 2025