Lateral behavior of high-speed railway bridge pile foundation in soft soils under adjacent surcharge loads considering time-dependent characteristics
The adjacent surcharge caused by improper soil dumping and irregular backfilling poses a huge threat to the safe service of high-speed railway bridge pile foundations in soft soils. In this study, multiple-case field prototype tests including different surcharge distances and loading values and a nu...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016824012006 |
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| author | Shuanglong Li Zhiping Deng Limin Wei Qiaoxiong Chen Yang Zhang Feifei He |
| author_facet | Shuanglong Li Zhiping Deng Limin Wei Qiaoxiong Chen Yang Zhang Feifei He |
| author_sort | Shuanglong Li |
| collection | DOAJ |
| description | The adjacent surcharge caused by improper soil dumping and irregular backfilling poses a huge threat to the safe service of high-speed railway bridge pile foundations in soft soils. In this study, multiple-case field prototype tests including different surcharge distances and loading values and a numerical model embedded with a soft soil material subroutine were carried out to investigate the time-dependent lateral behavior of bridge piles. The time-dependent mechanism of pile-soil interaction was revealed by characterizing the variations of the additional lateral load acting on the pile shaft, the soil-arching stress between piles, and the plastic deformation in the soil around piles. The results show that with increasing load duration, the bending moment and deflection of the pile increase gradually, and their distribution is closely related to the thickness and location of the soft soil layer. Furthermore, the horizontal soil-arching between piles underwent the stages of stabilization, local damage, and plastic flow, in which the passive load acting on the pile side continued to increase until it stabilized, resulting in time-dependent lateral deflection of the pile foundation. Consolidation parameters and pile-soil stiffness ratios also have a significant effect on the time-dependent behavior of pile responses. The conclusions obtained can provide a valuable reference for engineering applications to predict the long-term behavior of bridge piles. |
| format | Article |
| id | doaj-art-f1377955041940899348c7888a7e91b0 |
| institution | Kabale University |
| issn | 1110-0168 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj-art-f1377955041940899348c7888a7e91b02025-01-09T06:13:25ZengElsevierAlexandria Engineering Journal1110-01682025-01-01110451467Lateral behavior of high-speed railway bridge pile foundation in soft soils under adjacent surcharge loads considering time-dependent characteristicsShuanglong Li0Zhiping Deng1Limin Wei2Qiaoxiong Chen3Yang Zhang4Feifei He5School of Hydraulic Engineering, Nanchang Institute of Technology, Nanchang 330099, ChinaSchool of Hydraulic Engineering, Nanchang Institute of Technology, Nanchang 330099, China; Correspondence to: Nanchang Institute of Technology, Tianxiang Road, Nanchang 330099, China.School of Civil Engineering, Central South University, Changsha 410075, ChinaTeacher Development Center, Nanchang Institute of Technology, Nanchang 330099, ChinaSchool of Hydraulic Engineering, Nanchang Institute of Technology, Nanchang 330099, ChinaSchool of Hydraulic Engineering, Nanchang Institute of Technology, Nanchang 330099, ChinaThe adjacent surcharge caused by improper soil dumping and irregular backfilling poses a huge threat to the safe service of high-speed railway bridge pile foundations in soft soils. In this study, multiple-case field prototype tests including different surcharge distances and loading values and a numerical model embedded with a soft soil material subroutine were carried out to investigate the time-dependent lateral behavior of bridge piles. The time-dependent mechanism of pile-soil interaction was revealed by characterizing the variations of the additional lateral load acting on the pile shaft, the soil-arching stress between piles, and the plastic deformation in the soil around piles. The results show that with increasing load duration, the bending moment and deflection of the pile increase gradually, and their distribution is closely related to the thickness and location of the soft soil layer. Furthermore, the horizontal soil-arching between piles underwent the stages of stabilization, local damage, and plastic flow, in which the passive load acting on the pile side continued to increase until it stabilized, resulting in time-dependent lateral deflection of the pile foundation. Consolidation parameters and pile-soil stiffness ratios also have a significant effect on the time-dependent behavior of pile responses. The conclusions obtained can provide a valuable reference for engineering applications to predict the long-term behavior of bridge piles.http://www.sciencedirect.com/science/article/pii/S1110016824012006Bridge pile foundationSoft soilPassive loadTime-dependent responseSoil-arching stress |
| spellingShingle | Shuanglong Li Zhiping Deng Limin Wei Qiaoxiong Chen Yang Zhang Feifei He Lateral behavior of high-speed railway bridge pile foundation in soft soils under adjacent surcharge loads considering time-dependent characteristics Alexandria Engineering Journal Bridge pile foundation Soft soil Passive load Time-dependent response Soil-arching stress |
| title | Lateral behavior of high-speed railway bridge pile foundation in soft soils under adjacent surcharge loads considering time-dependent characteristics |
| title_full | Lateral behavior of high-speed railway bridge pile foundation in soft soils under adjacent surcharge loads considering time-dependent characteristics |
| title_fullStr | Lateral behavior of high-speed railway bridge pile foundation in soft soils under adjacent surcharge loads considering time-dependent characteristics |
| title_full_unstemmed | Lateral behavior of high-speed railway bridge pile foundation in soft soils under adjacent surcharge loads considering time-dependent characteristics |
| title_short | Lateral behavior of high-speed railway bridge pile foundation in soft soils under adjacent surcharge loads considering time-dependent characteristics |
| title_sort | lateral behavior of high speed railway bridge pile foundation in soft soils under adjacent surcharge loads considering time dependent characteristics |
| topic | Bridge pile foundation Soft soil Passive load Time-dependent response Soil-arching stress |
| url | http://www.sciencedirect.com/science/article/pii/S1110016824012006 |
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