Field Tests of Super-Long and Large-Diameter Drilled Shaft Pile Foundations
This study investigated the compressive behaviour of super-long pile foundations with large diameters. Three 52 m, 73 m, and 83 m long piles with a diameter of 1500 mm, 1500 mm, and 1800 mm were cast and tested, respectively. Given that large loading was required, an improved compressive static load...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8814257 |
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| author | Peisen Wang Hongyan Ding Jialin Zhou Wenjun Hu Xuechen Gu Erwin Oh |
| author_facet | Peisen Wang Hongyan Ding Jialin Zhou Wenjun Hu Xuechen Gu Erwin Oh |
| author_sort | Peisen Wang |
| collection | DOAJ |
| description | This study investigated the compressive behaviour of super-long pile foundations with large diameters. Three 52 m, 73 m, and 83 m long piles with a diameter of 1500 mm, 1500 mm, and 1800 mm were cast and tested, respectively. Given that large loading was required, an improved compressive static load test was introduced, and the load transfer mechanism, shaft resistance development, and distribution were analysed. This study found that the transferred load decreased along the pile during each applied load, but the gradients were different. For most layers, when increasing the load, the shaft resistance developed in the upper layers first, while the shaft resistance from the lower part did not always fully develop. Moreover, the “mutual compensation” phenomenon was discovered, which was when the shaft softening occurred from one soil layer, the shaft hardening of the other soil would occur simultaneously. Under consideration of the soil layer differences around these piles, it was recommended that shaft and base grouting should be applied on 52 m and 73 m piles, while only shaft grouting should be applied on the 83 m pile. For this longest pile design, whose toe resistance was discovered to be very small, increasing the pile length was not appropriate; thus, it was preferable to increase the pile diameter to increase the ultimate bearing capacity. |
| format | Article |
| id | doaj-art-baa1af1bf1374b869ece72179dc044fa |
| institution | OA Journals |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-baa1af1bf1374b869ece72179dc044fa2025-08-20T02:19:22ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88142578814257Field Tests of Super-Long and Large-Diameter Drilled Shaft Pile FoundationsPeisen Wang0Hongyan Ding1Jialin Zhou2Wenjun Hu3Xuechen Gu4Erwin Oh5State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, ChinaState Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, ChinaSchool of Engineering and Build Environment, Griffith University, 58 Parklands Dr, Southport, Queensland 4215, AustraliaSchool of Civil Engineering, Shandong Jianzhu University, No. 1000 Fengming Road, Jinan 250101, ChinaSchool of Engineering and Build Environment, Griffith University, 58 Parklands Dr, Southport, Queensland 4215, AustraliaSchool of Engineering and Build Environment, Griffith University, 58 Parklands Dr, Southport, Queensland 4215, AustraliaThis study investigated the compressive behaviour of super-long pile foundations with large diameters. Three 52 m, 73 m, and 83 m long piles with a diameter of 1500 mm, 1500 mm, and 1800 mm were cast and tested, respectively. Given that large loading was required, an improved compressive static load test was introduced, and the load transfer mechanism, shaft resistance development, and distribution were analysed. This study found that the transferred load decreased along the pile during each applied load, but the gradients were different. For most layers, when increasing the load, the shaft resistance developed in the upper layers first, while the shaft resistance from the lower part did not always fully develop. Moreover, the “mutual compensation” phenomenon was discovered, which was when the shaft softening occurred from one soil layer, the shaft hardening of the other soil would occur simultaneously. Under consideration of the soil layer differences around these piles, it was recommended that shaft and base grouting should be applied on 52 m and 73 m piles, while only shaft grouting should be applied on the 83 m pile. For this longest pile design, whose toe resistance was discovered to be very small, increasing the pile length was not appropriate; thus, it was preferable to increase the pile diameter to increase the ultimate bearing capacity.http://dx.doi.org/10.1155/2020/8814257 |
| spellingShingle | Peisen Wang Hongyan Ding Jialin Zhou Wenjun Hu Xuechen Gu Erwin Oh Field Tests of Super-Long and Large-Diameter Drilled Shaft Pile Foundations Advances in Civil Engineering |
| title | Field Tests of Super-Long and Large-Diameter Drilled Shaft Pile Foundations |
| title_full | Field Tests of Super-Long and Large-Diameter Drilled Shaft Pile Foundations |
| title_fullStr | Field Tests of Super-Long and Large-Diameter Drilled Shaft Pile Foundations |
| title_full_unstemmed | Field Tests of Super-Long and Large-Diameter Drilled Shaft Pile Foundations |
| title_short | Field Tests of Super-Long and Large-Diameter Drilled Shaft Pile Foundations |
| title_sort | field tests of super long and large diameter drilled shaft pile foundations |
| url | http://dx.doi.org/10.1155/2020/8814257 |
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