Axial capacity evaluation of rock-socketed cast-in-situ concrete piles

Mutjaba, H., Javed, M.T., Farooq, Khalid, Sivakugan, N., and Das, B.M. (2021) Axial capacity evaluation of rock-socketed cast-in-situ concrete piles. Soil Mechanics and Foundation Engineering, 58 (2). pp. 152-158.

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Abstract

Axial compressive capacity estimations determined from pile load tests (PLTs) are compared with theoretical methods for 13 rock-socketed cast-in-situ concrete piles constructed for different projects in Pakistan. Rock strata encountered at the project sites were mostly shale, siltstone, and sandstone. Rock quality designation (RQD) values fall within 20% to 50%, indicating that the rock mass is in fair to good condition, whereas the rock mass rating system yields a classification of poor to fair. The unconfined compressive strength of the rock cores ranges from 1.5 to 18 MPa. The PLT results show the axial compressive capacities are within 2 and 6 MPa. Axial compressive capacities were also calculated using theoretical methods. An equation is presented to determine the relationship between ultimate capacity and RQD using multiple linear regression analyses. The findings provide useful guidelines for selecting suitable and economical methods for the axial compressive capacities of rock-socketed cast-in-situ concrete piles.

Item ID: 68268
Item Type: Article (Research - C1)
ISSN: 1573-9279
Copyright Information: © 2021 Springer Science + Business Media, LLC
Additional Information:

Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 2, p. 19, March-April, 2021.

Date Deposited: 15 Jun 2021 01:21
FoR Codes: 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering @ 100%
SEO Codes: 12 CONSTRUCTION > 1202 Construction design > 120201 Civil construction design @ 100%
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