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A Case Study on the Bearing Capacity of Large Diameter Bored Piles Plugged in Weathered Limestone for Cable-Stayed Bridge
https://orcid.org/http://orcid.org/0000-0003-2249-4163
https://orcid.org/http://orcid.org/0000-0002-3853-5727
For bridge projects, load testing for large-diameter bored piles in the middle of a river is a challenge for traditional static load testing methods. The Bi-directional Static Axial Compressive Load—BSACL (ASTM D8169-18) solution is a reasonable method with the advantages of not using weight load and faster progress. This article presents the results of BSACL for a 1500 mm diameter bored pile, 45.5 m long, with the pile tip embedded in a weathered limestone layer. This is a case study of the Hieu River cable-stayed bridge in the center of Vietnam with a 200 m length span. The maximum load reached 17,250 kN applied through a Load Box placed at a depth of −37.4 m, with a movement of the Load Box approximately 11.9 mm upward, 9.8 mm downward, and 6.3 mm at the pile head. The side resistance in the slightly weathered limestone layer (RQD = 30%) achieved 350 kPa, and in the highly weathered limestone layer reached 175 kPa (RQD = 0%). The side resistance of the soil layers above the Load Box is also analyzed through strain gages simultaneously. The research results could help engineers to understand the load distribution along the bored piles.
A Case Study on the Bearing Capacity of Large Diameter Bored Piles Plugged in Weathered Limestone for Cable-Stayed Bridge
https://orcid.org/http://orcid.org/0000-0003-2249-4163
https://orcid.org/http://orcid.org/0000-0002-3853-5727
For bridge projects, load testing for large-diameter bored piles in the middle of a river is a challenge for traditional static load testing methods. The Bi-directional Static Axial Compressive Load—BSACL (ASTM D8169-18) solution is a reasonable method with the advantages of not using weight load and faster progress. This article presents the results of BSACL for a 1500 mm diameter bored pile, 45.5 m long, with the pile tip embedded in a weathered limestone layer. This is a case study of the Hieu River cable-stayed bridge in the center of Vietnam with a 200 m length span. The maximum load reached 17,250 kN applied through a Load Box placed at a depth of −37.4 m, with a movement of the Load Box approximately 11.9 mm upward, 9.8 mm downward, and 6.3 mm at the pile head. The side resistance in the slightly weathered limestone layer (RQD = 30%) achieved 350 kPa, and in the highly weathered limestone layer reached 175 kPa (RQD = 0%). The side resistance of the soil layers above the Load Box is also analyzed through strain gages simultaneously. The research results could help engineers to understand the load distribution along the bored piles.
A Case Study on the Bearing Capacity of Large Diameter Bored Piles Plugged in Weathered Limestone for Cable-Stayed Bridge
https://orcid.org/http://orcid.org/0000-0003-2249-4163
https://orcid.org/http://orcid.org/0000-0002-3853-5727
For bridge projects, load testing for large-diameter bored piles in the middle of a river is a challenge for traditional static load testing methods. The Bi-directional Static Axial Compressive Load—BSACL (ASTM D8169-18) solution is a reasonable method with the advantages of not using weight load and faster progress. This article presents the results of BSACL for a 1500 mm diameter bored pile, 45.5 m long, with the pile tip embedded in a weathered limestone layer. This is a case study of the Hieu River cable-stayed bridge in the center of Vietnam with a 200 m length span. The maximum load reached 17,250 kN applied through a Load Box placed at a depth of −37.4 m, with a movement of the Load Box approximately 11.9 mm upward, 9.8 mm downward, and 6.3 mm at the pile head. The side resistance in the slightly weathered limestone layer (RQD = 30%) achieved 350 kPa, and in the highly weathered limestone layer reached 175 kPa (RQD = 0%). The side resistance of the soil layers above the Load Box is also analyzed through strain gages simultaneously. The research results could help engineers to understand the load distribution along the bored piles.
A Case Study on the Bearing Capacity of Large Diameter Bored Piles Plugged in Weathered Limestone for Cable-Stayed Bridge
Lecture Notes in Civil Engineering
Rujikiatkamjorn, Cholachat (editor) / Xue, Jianfeng (editor) / Indraratna, Buddhima (editor) / Dao, Do Huu (author) / Van Ngoc, Pham (author) / Nam, Huynh Phuong (author) / Minh, Ho Dac Khanh (author)
International Conference on Transportation Geotechnics ; 2024 ; Sydney, NSW, Australia
2024-10-22
9 pages
Article/Chapter (Book)
Electronic Resource
English
Large diameter bored pile , Pile axial bearing capacity , Side resistance , Toe resistance , Cable-stayed bridge , Weathered Limestone , Bi-directional Static Axial Compressive Load—BSACL Engineering , Geoengineering, Foundations, Hydraulics , Geotechnical Engineering & Applied Earth Sciences , Transportation Technology and Traffic Engineering
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