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104952

Evaluation of Bored Piles Load Capacity in Rock Bearing.

Article

Last updated: 22 Jan 2023

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Subjects

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Tags

Civil Engineering

Abstract

Rock socketed bored piles are particularly advantageous for conditions in which rock is near the ground surface underlying weak layers. This paper aims to predicate the ultimate capacity of bored piles supported in rock using analytical and mathematically based graphical approaches. Data-base of pile load tests from three projects constructed in Abu-Dhabi city in UAE were used, and Finite Element Analysis using 2-D Plaxis axisymmetric model has been developed to simulate the behaviour of such piles. The ultimate load predicted from the FEM method is compared with that estimated from the theoretical approaches. The pile working load with the corresponding settlements estimated from the theoretical approaches based on reasonable factor of safety were evaluated based on the results of pile load tests.
 From this study it was found that, the results of pile ultimate load estimated from the static formula were closer to those predicted by the FEM, compared with those calculated by modified Chin and Hansen methods. Under the ultimate load settlement was about 2.3% of pile diameter. While the socket length of a pile into rock is an important factor, the strength and R.Q.D. of rock seem to be the most significant parameters even for lesser socket length. The limiting displacement, after which the applied axial load is shared between the side resistance and the base resistance, has found to vary between 0.3% to 1.1% of rock socketed pile length, depending on the rock strength and R.Q.D.

DOI

10.21608/bfemu.2020.104952

Keywords

Bored Pile, carrying capacity, Pile load tests, theoretical and Finite Element Analyses

Authors

First Name

M.

Last Name

Tarek

MiddleName

F.

Affiliation

Professor of Soil Mechanics and Foundation Engineering, Al-Azhar University, Cairo, Egypt

Email

tarek_fouadeg@yahoo.com

City

-

Orcid

-

First Name

M.

Last Name

Bahr

MiddleName

A.

Affiliation

Professor of Soil Mechanics and Foundation Engineering, Al-Azhar University, Cairo, Egypt.

Email

mbahr_eg@yahoo.com

City

-

Orcid

-

First Name

S.

Last Name

Gad

MiddleName

A.

Affiliation

Professor of Soil Mechanics and Foundation Engineering, Al-Azhar University, Cairo, Egypt

Email

drsamirgad@yahoo.com

City

-

Orcid

-

First Name

A.

Last Name

Zaki

MiddleName

H.

Affiliation

M.Sc. Student, AL Azhar University, Cairo, Egypt

Email

eng_zaki3010@yahoo.com

City

-

Orcid

-

Volume

40

Article Issue

6

Related Issue

15885

Issue Date

2015-12-01

Receive Date

2015-09-26

Publish Date

2015-12-01

Page Start

64

Page End

73

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 40_Issue 6_Pages 64-73.pdf

PDF . 553.1kB

Link

https://bfemu.journals.ekb.eg/article_104952.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=104952

Order

8

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

-

Details

Type

Article

Created At

22 Jan 2023