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The Reaction of CPT to Excavation Unloading and Its Effect on Laterally Loaded Piles
With the increase of high-rise building construction and the development of underground space, the failures of pile foundations caused by soil excavations are also on the increase. This paper presents the results from field tests which were conducted to investigate the effects of excavation unloading on the performance of CPT cone resistance and laterally loaded piles in Jiangsu deposits of eastern China. The reaction of cone resistance to various excavation types (overall excavation and adjacent excavation) was obtained, and can be used as a direct and reliable evaluation approach to understand the characteristics of the excavation unloading. Based on the cone resistance profiles, the effect of the excavation on the lateral bearing capacity of single piles was analysed using a CPT-based p-y method. In addition, the lateral behavior of the single piles after excavation and its difference from the piles in the free field were presented. The predicted results from CPT profiles were in reasonable agreement with those from the lateral load tests.
The Reaction of CPT to Excavation Unloading and Its Effect on Laterally Loaded Piles
With the increase of high-rise building construction and the development of underground space, the failures of pile foundations caused by soil excavations are also on the increase. This paper presents the results from field tests which were conducted to investigate the effects of excavation unloading on the performance of CPT cone resistance and laterally loaded piles in Jiangsu deposits of eastern China. The reaction of cone resistance to various excavation types (overall excavation and adjacent excavation) was obtained, and can be used as a direct and reliable evaluation approach to understand the characteristics of the excavation unloading. Based on the cone resistance profiles, the effect of the excavation on the lateral bearing capacity of single piles was analysed using a CPT-based p-y method. In addition, the lateral behavior of the single piles after excavation and its difference from the piles in the free field were presented. The predicted results from CPT profiles were in reasonable agreement with those from the lateral load tests.
The Reaction of CPT to Excavation Unloading and Its Effect on Laterally Loaded Piles
Li, Hongjiang (author) / Liu, Songyu (author) / Tong, Liyuan (author) / Yang, Tao (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 10-19
2019-03-21
Conference paper
Electronic Resource
English
The Reaction of CPT to Excavation Unloading and Its Effect on Laterally Loaded Piles
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