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Experimental Study on Anti-frost Jacking of Belled Pile in Seasonally Frozen Ground Regions
Abstract In seasonally frozen ground regions, the pile foundation embedded in frost-susceptible soils can be subjected to tangential frost-heave force, which is defined as an uplift force that acts along the pile-frozen soil interface. The belled pile in seasonally frozen ground regions was designed to produce a self-anchoring force so as to enhance bearing capacity against to frost-heave force. In order to reveal the function of anti-frost jacking of belled pile and the effect of different base angles belled pile embedded in seasonally frozen ground area, one-dimensional freezing test was conducted for three different base angel belled piles and a uniform-section pile. Freezing process, displacements of piles and soil surface, and soil pressure were monitored respectively. The results showed that the ultimate displacement of three belled piles were approximately 1/5 of uniform-section pile. The frost heave of ground surface beside the pile presented a funnel-shaped state, which illustrated that the pile restricted the free frost heave of the soil. The soil pressure beside the enlarged base presented different patterns with the change of frost depth and base angle. On this basis, the function of anti-frost jacking of belled pile embedded in frost-susceptible soils could be put forward ultimately.
Experimental Study on Anti-frost Jacking of Belled Pile in Seasonally Frozen Ground Regions
Abstract In seasonally frozen ground regions, the pile foundation embedded in frost-susceptible soils can be subjected to tangential frost-heave force, which is defined as an uplift force that acts along the pile-frozen soil interface. The belled pile in seasonally frozen ground regions was designed to produce a self-anchoring force so as to enhance bearing capacity against to frost-heave force. In order to reveal the function of anti-frost jacking of belled pile and the effect of different base angles belled pile embedded in seasonally frozen ground area, one-dimensional freezing test was conducted for three different base angel belled piles and a uniform-section pile. Freezing process, displacements of piles and soil surface, and soil pressure were monitored respectively. The results showed that the ultimate displacement of three belled piles were approximately 1/5 of uniform-section pile. The frost heave of ground surface beside the pile presented a funnel-shaped state, which illustrated that the pile restricted the free frost heave of the soil. The soil pressure beside the enlarged base presented different patterns with the change of frost depth and base angle. On this basis, the function of anti-frost jacking of belled pile embedded in frost-susceptible soils could be put forward ultimately.
Experimental Study on Anti-frost Jacking of Belled Pile in Seasonally Frozen Ground Regions
Huang, Xubin (author) / Sheng, Yu (author)
2018-01-01
4 pages
Article/Chapter (Book)
Electronic Resource
English
Frost jacking of piles in seasonally and perennially frozen ground
| Elsevier | 2022
| British Library Online Contents | 2017
| British Library Online Contents | 2017