Influence of disturbance degree on the propped excavation stability in sandy soil in Shenyang, China
The stability of deep excavation is often investigated through numerical simulation. However, most constitutive models cannot take into account the influence of disturbance on soil response, especially for excavations in sandy soils. In this study, the conventional Duncan–Chang constitutive model is...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-06-01
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| Series: | Underground Space |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467967423000053 |
| _version_ | 1827829675286593536 |
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| author | Jiachao Dong Chen Chen Manman Dong Bo Lu Yongping Guan Wen Zhao |
| author_facet | Jiachao Dong Chen Chen Manman Dong Bo Lu Yongping Guan Wen Zhao |
| author_sort | Jiachao Dong |
| collection | DOAJ |
| description | The stability of deep excavation is often investigated through numerical simulation. However, most constitutive models cannot take into account the influence of disturbance on soil response, especially for excavations in sandy soils. In this study, the conventional Duncan–Chang constitutive model is modified based on the data obtained from a series of triaxial consolidated drained tests on medium coarse sand with different relative densities, where all input parameters in the model are correlated with the changes in relative density due to disturbance. The modified hyperbolic model is then implemented in the general-purpose finite element code, ABAQUS. The efficiency of the proposed constitutive mode is demonstrated by comparing with the experimental data. Furthermore, a case study of a large-scale propped excavation for a subway station in Shenyang is analyzed through numerical calculations with the conventional Mohr–Coulomb model and the proposed hyperbolic model, and theoretical derivations based on the current technical code in China. It is found that the proposed approach can provide reasonable estimations compared with field measurements with a maximum error of 28% for maximum horizontal displacement of the solider pile and of 8% for maximum ground surface settlement, whereas the other techniques overestimate the behaviour of deep excavation significantly by more than 90%. |
| first_indexed | 2024-03-12T04:08:51Z |
| format | Article |
| id | doaj.art-5d3435ff48e544188b7200c4052764f7 |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-12T04:08:51Z |
| publishDate | 2023-06-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-5d3435ff48e544188b7200c4052764f72023-09-03T11:09:43ZengKeAi Communications Co., Ltd.Underground Space2467-96742023-06-0110150165Influence of disturbance degree on the propped excavation stability in sandy soil in Shenyang, ChinaJiachao Dong0Chen Chen1Manman Dong2Bo Lu3Yongping Guan4Wen Zhao5School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, ChinaNortheast Architectural Design & Research Institute Co. Ltd, Shenyang 110003, ChinaDepartment of Engineering Management, Changshu Institute of Technology, Changshu 215500, ChinaSchool of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China; Corresponding author.Taizhou Transportation Investment Group, Taizhou 318000, ChinaSchool of Resources and Civil Engineering, Northeastern University, Shenyang 110819, ChinaThe stability of deep excavation is often investigated through numerical simulation. However, most constitutive models cannot take into account the influence of disturbance on soil response, especially for excavations in sandy soils. In this study, the conventional Duncan–Chang constitutive model is modified based on the data obtained from a series of triaxial consolidated drained tests on medium coarse sand with different relative densities, where all input parameters in the model are correlated with the changes in relative density due to disturbance. The modified hyperbolic model is then implemented in the general-purpose finite element code, ABAQUS. The efficiency of the proposed constitutive mode is demonstrated by comparing with the experimental data. Furthermore, a case study of a large-scale propped excavation for a subway station in Shenyang is analyzed through numerical calculations with the conventional Mohr–Coulomb model and the proposed hyperbolic model, and theoretical derivations based on the current technical code in China. It is found that the proposed approach can provide reasonable estimations compared with field measurements with a maximum error of 28% for maximum horizontal displacement of the solider pile and of 8% for maximum ground surface settlement, whereas the other techniques overestimate the behaviour of deep excavation significantly by more than 90%.http://www.sciencedirect.com/science/article/pii/S2467967423000053Propped excavationTriaxial testsConstitutive modelDisturbance degreeNumerical analysis |
| spellingShingle | Jiachao Dong Chen Chen Manman Dong Bo Lu Yongping Guan Wen Zhao Influence of disturbance degree on the propped excavation stability in sandy soil in Shenyang, China Underground Space Propped excavation Triaxial tests Constitutive model Disturbance degree Numerical analysis |
| title | Influence of disturbance degree on the propped excavation stability in sandy soil in Shenyang, China |
| title_full | Influence of disturbance degree on the propped excavation stability in sandy soil in Shenyang, China |
| title_fullStr | Influence of disturbance degree on the propped excavation stability in sandy soil in Shenyang, China |
| title_full_unstemmed | Influence of disturbance degree on the propped excavation stability in sandy soil in Shenyang, China |
| title_short | Influence of disturbance degree on the propped excavation stability in sandy soil in Shenyang, China |
| title_sort | influence of disturbance degree on the propped excavation stability in sandy soil in shenyang china |
| topic | Propped excavation Triaxial tests Constitutive model Disturbance degree Numerical analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2467967423000053 |
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