Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pullout Behaviour of Micropiles Stabilized with Fly Ash
https://orcid.org/http://orcid.org/0000-0002-9515-4568
Micropiles have been used in numerous ground improvement applications effectively to increase the bearing capacity and reduce the settlements in general and strengthen the existing foundations in general and other geotechnical facilities in particular. Frictional resistance between the pile surface and soil and the accompanying group effects of micropiles are considered as the possible improvement mechanism. Literature review reveals that a limited research is available on micropiles regarding field testing and use of alternate material mix for concrete for casting micropile. In this connection, the present study deals with the field testing of micropiles stabilized with fly ash for their pullout load–displacement behavior. Here, micropiles of 178 mm in diameter and 530 mm in length were installed and tested with varying percentage of cement replacement with fly ash. The study attempts to understand the effect of fly ash on pullout load–displacement behavior of micropile by replacing the cement with fly ash in varying percentages viz. 0%, 5%, 10%, 15%, 20%, 25%, and 30% while casting micropiles. Ultimate pullout load increases with fly ash percentage from 5 to 20% and then decreases. Micropile displacements were marginally reduced for a given pullout load, with increase in percentage of fly ash. From the results, it is evident that the pullout load–displacement behaviour clearly considers the micropile–soil interaction i.e., bond strength is influenced by fly ash presence.
Pullout Behaviour of Micropiles Stabilized with Fly Ash
https://orcid.org/http://orcid.org/0000-0002-9515-4568
Micropiles have been used in numerous ground improvement applications effectively to increase the bearing capacity and reduce the settlements in general and strengthen the existing foundations in general and other geotechnical facilities in particular. Frictional resistance between the pile surface and soil and the accompanying group effects of micropiles are considered as the possible improvement mechanism. Literature review reveals that a limited research is available on micropiles regarding field testing and use of alternate material mix for concrete for casting micropile. In this connection, the present study deals with the field testing of micropiles stabilized with fly ash for their pullout load–displacement behavior. Here, micropiles of 178 mm in diameter and 530 mm in length were installed and tested with varying percentage of cement replacement with fly ash. The study attempts to understand the effect of fly ash on pullout load–displacement behavior of micropile by replacing the cement with fly ash in varying percentages viz. 0%, 5%, 10%, 15%, 20%, 25%, and 30% while casting micropiles. Ultimate pullout load increases with fly ash percentage from 5 to 20% and then decreases. Micropile displacements were marginally reduced for a given pullout load, with increase in percentage of fly ash. From the results, it is evident that the pullout load–displacement behaviour clearly considers the micropile–soil interaction i.e., bond strength is influenced by fly ash presence.
Pullout Behaviour of Micropiles Stabilized with Fly Ash
https://orcid.org/http://orcid.org/0000-0002-9515-4568
Micropiles have been used in numerous ground improvement applications effectively to increase the bearing capacity and reduce the settlements in general and strengthen the existing foundations in general and other geotechnical facilities in particular. Frictional resistance between the pile surface and soil and the accompanying group effects of micropiles are considered as the possible improvement mechanism. Literature review reveals that a limited research is available on micropiles regarding field testing and use of alternate material mix for concrete for casting micropile. In this connection, the present study deals with the field testing of micropiles stabilized with fly ash for their pullout load–displacement behavior. Here, micropiles of 178 mm in diameter and 530 mm in length were installed and tested with varying percentage of cement replacement with fly ash. The study attempts to understand the effect of fly ash on pullout load–displacement behavior of micropile by replacing the cement with fly ash in varying percentages viz. 0%, 5%, 10%, 15%, 20%, 25%, and 30% while casting micropiles. Ultimate pullout load increases with fly ash percentage from 5 to 20% and then decreases. Micropile displacements were marginally reduced for a given pullout load, with increase in percentage of fly ash. From the results, it is evident that the pullout load–displacement behaviour clearly considers the micropile–soil interaction i.e., bond strength is influenced by fly ash presence.
Pullout Behaviour of Micropiles Stabilized with Fly Ash
Int. J. of Geosynth. and Ground Eng.
Orekanti, Eswara Reddy (Autor:in) / Puram, Rajasekhar (Autor:in)
01.12.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Experimental Study on Model Micropiles under Oblique Pullout Loads
| British Library Conference Proceedings | 2014
| NTIS | 2002
| British Library Conference Proceedings | 2019