Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improvement of Pile Load Capacity in Warm Frozen Soils
Adfreeze piles have been widely used to transfer the structural loads to the ground in permafrost region mainly due to their high load carrying capacity in frozen ground. These foundations are often designed based on the strength characteristics of frozen ground materials and the adfreeze bond at the pile–soil interface. However, pile foundations located in frozen grounds may experience significant reduction in their load carrying capacity when exposed to higher ambient temperature. This paper attempts to examine the possibility of circulating a freezing liquid within and around existing pile foundations to maintain the frozen state of pile–soil adfreeze bonding around the piles. A model pile load test setup was developed using steel pipe piles embedded in cohesionless ice-poor soils to examine the possibility of adfreeze bond formation induced by circulation of freezing liquid in the pile. The experimental results showed that local freezing is capable of decreasing temperature in the pile surrounding soil and developing adfreeze bond at the pile–soil interface. The pile shaft capacity significantly increased up to twice its initial strength when the pile was exposed to circulation of antifreeze liquid for only 25 min. A finite element model was also developed using ABAQUS software and calibrated by the test results to investigate the effect of controlling parameters on load carrying capacity of the piles.
Improvement of Pile Load Capacity in Warm Frozen Soils
Adfreeze piles have been widely used to transfer the structural loads to the ground in permafrost region mainly due to their high load carrying capacity in frozen ground. These foundations are often designed based on the strength characteristics of frozen ground materials and the adfreeze bond at the pile–soil interface. However, pile foundations located in frozen grounds may experience significant reduction in their load carrying capacity when exposed to higher ambient temperature. This paper attempts to examine the possibility of circulating a freezing liquid within and around existing pile foundations to maintain the frozen state of pile–soil adfreeze bonding around the piles. A model pile load test setup was developed using steel pipe piles embedded in cohesionless ice-poor soils to examine the possibility of adfreeze bond formation induced by circulation of freezing liquid in the pile. The experimental results showed that local freezing is capable of decreasing temperature in the pile surrounding soil and developing adfreeze bond at the pile–soil interface. The pile shaft capacity significantly increased up to twice its initial strength when the pile was exposed to circulation of antifreeze liquid for only 25 min. A finite element model was also developed using ABAQUS software and calibrated by the test results to investigate the effect of controlling parameters on load carrying capacity of the piles.
Improvement of Pile Load Capacity in Warm Frozen Soils
Lecture Notes in Civil Engineering
Desjardins, Serge (Herausgeber:in) / Poitras, Gérard J. (Herausgeber:in) / Amanzadeh, Amirhossein (Autor:in) / Rayhani, Mohammad (Autor:in)
Canadian Society of Civil Engineering Annual Conference ; 2023 ; Moncton, NB, Canada
Proceedings of the Canadian Society for Civil Engineering Annual Conference 2023, Volume 1 ; Kapitel: 24 ; 321-328
01.10.2024
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Pile foundations in frozen soils
| Tema Archiv | 1977
Pile Foundations in Thermally Fragile Frozen Soils
| NTIS | 1970
Determination of the Pile Load Capacity of Collapsible Soils
| Online Contents | 2020
Method of pile driving in plastic-frozen soils
| Online Contents | 1976
Investigation of the Pore-Water Pressure of Saturated Warm Frozen Soils Under a Constant Load
| Online Contents | 2016