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Ultimate grout-to-soil bond strength of micropiles in glacial deposits
https://orcid.org/http://orcid.org/0000-0002-0777-2818
https://orcid.org/http://orcid.org/0000-0003-0488-0263
This paper analyzed the ultimate grout-to-soil bond strength based on a database of 40 full-scale static load tests conducted on micropiles in glacial deposits in the province of Ontario, Canada. The Décourt extrapolation method was used to extrapolate the field load–settlement curves to identify the ultimate limit state. The elastic length method was modified by considering the shear stress influence to more accurately predict the failure loads of micropiles. A set of the ultimate bond strengths were correlated with the field standard penetration test blow count for different types of micropiles in different soil conditions. The results were compared with existing design values recommended by the Federal Highway Administration manual. The findings will help to improve the design of micropiles in similar soil conditions and the development of a reliability-based design method for soil-bonded micropiles.
Ultimate grout-to-soil bond strength of micropiles in glacial deposits
https://orcid.org/http://orcid.org/0000-0002-0777-2818
https://orcid.org/http://orcid.org/0000-0003-0488-0263
This paper analyzed the ultimate grout-to-soil bond strength based on a database of 40 full-scale static load tests conducted on micropiles in glacial deposits in the province of Ontario, Canada. The Décourt extrapolation method was used to extrapolate the field load–settlement curves to identify the ultimate limit state. The elastic length method was modified by considering the shear stress influence to more accurately predict the failure loads of micropiles. A set of the ultimate bond strengths were correlated with the field standard penetration test blow count for different types of micropiles in different soil conditions. The results were compared with existing design values recommended by the Federal Highway Administration manual. The findings will help to improve the design of micropiles in similar soil conditions and the development of a reliability-based design method for soil-bonded micropiles.
Ultimate grout-to-soil bond strength of micropiles in glacial deposits
https://orcid.org/http://orcid.org/0000-0002-0777-2818
https://orcid.org/http://orcid.org/0000-0003-0488-0263
This paper analyzed the ultimate grout-to-soil bond strength based on a database of 40 full-scale static load tests conducted on micropiles in glacial deposits in the province of Ontario, Canada. The Décourt extrapolation method was used to extrapolate the field load–settlement curves to identify the ultimate limit state. The elastic length method was modified by considering the shear stress influence to more accurately predict the failure loads of micropiles. A set of the ultimate bond strengths were correlated with the field standard penetration test blow count for different types of micropiles in different soil conditions. The results were compared with existing design values recommended by the Federal Highway Administration manual. The findings will help to improve the design of micropiles in similar soil conditions and the development of a reliability-based design method for soil-bonded micropiles.
Ultimate grout-to-soil bond strength of micropiles in glacial deposits
Acta Geotech.
Almeida, Alexandre P. R. P. (author) / Liu, Jinyuan (author) / Gurpersaud, Naresh (author) / Bruce, Jim (author)
Acta Geotechnica ; 17 ; 577-600
2022-02-01
24 pages
Article (Journal)
Electronic Resource
English
Micropile , Static load test , Axial capacity , Glacial deposits , Grout-to-soil bond strength Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
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