Study on Parameters of Modified Mohr–Coulomb Model for Water-rich Soft Soil in Tianjin, China
Abstract Foundation pit excavation through the soft layer has great technical challenges and potential safety risks, especially in soft soil area. In this study, we use a 3D numerical model of Foundation pit to simulate the excavation process. Based on the simulation, the sensitivity analysis of the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Springer
2023-06-01
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| Series: | SN Applied Sciences |
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| Online Access: | https://doi.org/10.1007/s42452-023-05411-x |
| _version_ | 1797801330467667968 |
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| author | Huanfa Ma Xin Hao Yongpeng Yang Hui Li Lixin Yi |
| author_facet | Huanfa Ma Xin Hao Yongpeng Yang Hui Li Lixin Yi |
| author_sort | Huanfa Ma |
| collection | DOAJ |
| description | Abstract Foundation pit excavation through the soft layer has great technical challenges and potential safety risks, especially in soft soil area. In this study, we use a 3D numerical model of Foundation pit to simulate the excavation process. Based on the simulation, the sensitivity analysis of the three stiffness parameters ( $${\mathrm{E}}_{\mathrm{ur}}^{\mathrm{ref}}$$ E ur ref , $${\mathrm{E}}_{50}^{\mathrm{ref}}$$ E 50 ref and $${\mathrm{E}}_{\mathrm{oed}}^{\mathrm{ref}}$$ E oed ref ) of the Modified Mohr–Coulomb model was carried out by using the Latin hypercube-one factor at a time method. During the simulation, the three stiffness parameters are changed with the perturbation amplitude of (± 20%) and (± 40%). In addition, the sensitivity of three stiffness parameters was calculated by taking the horizontal displacement of diaphragm wall as the observation index. Furthermore, by comparing the results of simulation with the measured data, the stiffness ratio relationship suitable for foundation pit simulation in Tianjin water-rich soft soil area are obtained. Our findings present that $${\mathrm{E}}_{\mathrm{ur}}^{\mathrm{ref}}$$ E ur ref is the parameter that has the largest influence on the uncertainty in the MMC model, while $${\mathrm{E}}_{\mathrm{oed}}^{\mathrm{ref}}$$ E oed ref is the least sensitive to horizontal displacement of diaphragm wall. The proportion rates of $${\mathrm{E}}_{\mathrm{oed}}^{\mathrm{ref}}$$ E oed ref / $${\mathrm{E}}_{50}^{\mathrm{ref}}$$ E 50 ref and $${\mathrm{E}}_{\mathrm{ur}}^{\mathrm{ref}}{/\mathrm{E}}_{50}^{\mathrm{ref}}$$ E ur ref / E 50 ref provide a promising reference for simulating the foundation pit excavation in Tianjin water-rich soft soil area. |
| first_indexed | 2024-03-13T04:48:49Z |
| format | Article |
| id | doaj.art-c5882057d6c44b7fbefc52189ccc0154 |
| institution | Directory Open Access Journal |
| issn | 2523-3963 2523-3971 |
| language | English |
| last_indexed | 2024-03-13T04:48:49Z |
| publishDate | 2023-06-01 |
| publisher | Springer |
| record_format | Article |
| series | SN Applied Sciences |
| spelling | doaj.art-c5882057d6c44b7fbefc52189ccc01542023-06-18T11:22:00ZengSpringerSN Applied Sciences2523-39632523-39712023-06-015711110.1007/s42452-023-05411-xStudy on Parameters of Modified Mohr–Coulomb Model for Water-rich Soft Soil in Tianjin, ChinaHuanfa Ma0Xin Hao1Yongpeng Yang2Hui Li3Lixin Yi4China Communications Construction Company Tunnel Engineering Bureau Co. LtdCollege of Environmental Science and Engineering, Nankai UniversityCollege of Environmental Science and Engineering, Nankai UniversityChina Communications Construction Company Tunnel Engineering Bureau Co. LtdCollege of Environmental Science and Engineering, Nankai UniversityAbstract Foundation pit excavation through the soft layer has great technical challenges and potential safety risks, especially in soft soil area. In this study, we use a 3D numerical model of Foundation pit to simulate the excavation process. Based on the simulation, the sensitivity analysis of the three stiffness parameters ( $${\mathrm{E}}_{\mathrm{ur}}^{\mathrm{ref}}$$ E ur ref , $${\mathrm{E}}_{50}^{\mathrm{ref}}$$ E 50 ref and $${\mathrm{E}}_{\mathrm{oed}}^{\mathrm{ref}}$$ E oed ref ) of the Modified Mohr–Coulomb model was carried out by using the Latin hypercube-one factor at a time method. During the simulation, the three stiffness parameters are changed with the perturbation amplitude of (± 20%) and (± 40%). In addition, the sensitivity of three stiffness parameters was calculated by taking the horizontal displacement of diaphragm wall as the observation index. Furthermore, by comparing the results of simulation with the measured data, the stiffness ratio relationship suitable for foundation pit simulation in Tianjin water-rich soft soil area are obtained. Our findings present that $${\mathrm{E}}_{\mathrm{ur}}^{\mathrm{ref}}$$ E ur ref is the parameter that has the largest influence on the uncertainty in the MMC model, while $${\mathrm{E}}_{\mathrm{oed}}^{\mathrm{ref}}$$ E oed ref is the least sensitive to horizontal displacement of diaphragm wall. The proportion rates of $${\mathrm{E}}_{\mathrm{oed}}^{\mathrm{ref}}$$ E oed ref / $${\mathrm{E}}_{50}^{\mathrm{ref}}$$ E 50 ref and $${\mathrm{E}}_{\mathrm{ur}}^{\mathrm{ref}}{/\mathrm{E}}_{50}^{\mathrm{ref}}$$ E ur ref / E 50 ref provide a promising reference for simulating the foundation pit excavation in Tianjin water-rich soft soil area.https://doi.org/10.1007/s42452-023-05411-xModified Mohr–Coulomb Model (MMC model)Water-rich soft soilLatin Hypercube One factor at a Time (LH-OAT) methodSensitivity analysis |
| spellingShingle | Huanfa Ma Xin Hao Yongpeng Yang Hui Li Lixin Yi Study on Parameters of Modified Mohr–Coulomb Model for Water-rich Soft Soil in Tianjin, China SN Applied Sciences Modified Mohr–Coulomb Model (MMC model) Water-rich soft soil Latin Hypercube One factor at a Time (LH-OAT) method Sensitivity analysis |
| title | Study on Parameters of Modified Mohr–Coulomb Model for Water-rich Soft Soil in Tianjin, China |
| title_full | Study on Parameters of Modified Mohr–Coulomb Model for Water-rich Soft Soil in Tianjin, China |
| title_fullStr | Study on Parameters of Modified Mohr–Coulomb Model for Water-rich Soft Soil in Tianjin, China |
| title_full_unstemmed | Study on Parameters of Modified Mohr–Coulomb Model for Water-rich Soft Soil in Tianjin, China |
| title_short | Study on Parameters of Modified Mohr–Coulomb Model for Water-rich Soft Soil in Tianjin, China |
| title_sort | study on parameters of modified mohr coulomb model for water rich soft soil in tianjin china |
| topic | Modified Mohr–Coulomb Model (MMC model) Water-rich soft soil Latin Hypercube One factor at a Time (LH-OAT) method Sensitivity analysis |
| url | https://doi.org/10.1007/s42452-023-05411-x |
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