One-Dimensional Consolidation Properties of Soft Clay under Multi-Stage Loading
The consolidation characteristics of soft clay under multi-stage loading and single-stage loading exhibit significant differences. In order to investigate the consolidation behavior of soft clay under multi-stage loading, one-dimensional oedometer tests were conducted on marine sedimentary soft clay...
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MDPI AG
2023-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/18/10340 |
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| author | Jiangfeng Wang Wei Yuan Xuexuan Yin Wenjie Li Xinya Li |
| author_facet | Jiangfeng Wang Wei Yuan Xuexuan Yin Wenjie Li Xinya Li |
| author_sort | Jiangfeng Wang |
| collection | DOAJ |
| description | The consolidation characteristics of soft clay under multi-stage loading and single-stage loading exhibit significant differences. In order to investigate the consolidation behavior of soft clay under multi-stage loading, one-dimensional oedometer tests were conducted on marine sedimentary soft clay from northern China. The results indicate that the overall time-deformation pattern of multi-stage loading is a cyclic nonlinear extension of that of single-stage loading. The final deformation between multi-stage loading and single-stage loading is approximately equal; however, the consolidation rate of single-stage loading is four times that of multi-stage loading. Furthermore, the coefficient of consolidation (<i>C<sub>v</sub></i>) decreases with increasing stress. Subsequently, the traditional Terzaghi one-dimensional consolidation equation was modified and a consolidation equation suitable for multi-stage loading is proposed in this study. The analysis of engineering applications demonstrates that the traditional theory provides more accurate predictions of consolidation rate and settlement when the load is small. However, when the load is large, the settlement predicted using the Terzaghi one-dimensional consolidation equation may have an error of 0–25% compared to that using the modified equation. The modified Terzaghi one-dimensional consolidation equation provides a more accurate representation of the actual consolidation of soft soil. |
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| id | doaj.art-9fb506851e5045569076cf77ef4bcfb2 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T23:04:31Z |
| publishDate | 2023-09-01 |
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| spelling | doaj.art-9fb506851e5045569076cf77ef4bcfb22023-11-19T09:26:22ZengMDPI AGApplied Sciences2076-34172023-09-0113181034010.3390/app131810340One-Dimensional Consolidation Properties of Soft Clay under Multi-Stage LoadingJiangfeng Wang0Wei Yuan1Xuexuan Yin2Wenjie Li3Xinya Li4School of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Transportation, Southeast University, Nanjing 211189, ChinaSchool of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaSchool of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, ChinaThe consolidation characteristics of soft clay under multi-stage loading and single-stage loading exhibit significant differences. In order to investigate the consolidation behavior of soft clay under multi-stage loading, one-dimensional oedometer tests were conducted on marine sedimentary soft clay from northern China. The results indicate that the overall time-deformation pattern of multi-stage loading is a cyclic nonlinear extension of that of single-stage loading. The final deformation between multi-stage loading and single-stage loading is approximately equal; however, the consolidation rate of single-stage loading is four times that of multi-stage loading. Furthermore, the coefficient of consolidation (<i>C<sub>v</sub></i>) decreases with increasing stress. Subsequently, the traditional Terzaghi one-dimensional consolidation equation was modified and a consolidation equation suitable for multi-stage loading is proposed in this study. The analysis of engineering applications demonstrates that the traditional theory provides more accurate predictions of consolidation rate and settlement when the load is small. However, when the load is large, the settlement predicted using the Terzaghi one-dimensional consolidation equation may have an error of 0–25% compared to that using the modified equation. The modified Terzaghi one-dimensional consolidation equation provides a more accurate representation of the actual consolidation of soft soil.https://www.mdpi.com/2076-3417/13/18/10340surcharge preloadingmulti-stage loadingconsolidation coefficientfoundation settlementconsolidation rate |
| spellingShingle | Jiangfeng Wang Wei Yuan Xuexuan Yin Wenjie Li Xinya Li One-Dimensional Consolidation Properties of Soft Clay under Multi-Stage Loading Applied Sciences surcharge preloading multi-stage loading consolidation coefficient foundation settlement consolidation rate |
| title | One-Dimensional Consolidation Properties of Soft Clay under Multi-Stage Loading |
| title_full | One-Dimensional Consolidation Properties of Soft Clay under Multi-Stage Loading |
| title_fullStr | One-Dimensional Consolidation Properties of Soft Clay under Multi-Stage Loading |
| title_full_unstemmed | One-Dimensional Consolidation Properties of Soft Clay under Multi-Stage Loading |
| title_short | One-Dimensional Consolidation Properties of Soft Clay under Multi-Stage Loading |
| title_sort | one dimensional consolidation properties of soft clay under multi stage loading |
| topic | surcharge preloading multi-stage loading consolidation coefficient foundation settlement consolidation rate |
| url | https://www.mdpi.com/2076-3417/13/18/10340 |
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