A coupling method for simulating tunnel excavation with block, particle and bar elements
Excavation of tunnel in rock mass refers to complex continuum-discontinuous processes. For capturing the damages of side walls and the supports of bolts/cables, different types of elements shall be used in the same framework. In this work, a novel method is proposed which couples block, particle, an...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2021-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/24/e3sconf_caes2021_03042.pdf |
| _version_ | 1819121358921007104 |
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| author | Li Xiaoguang Li Changhong Feng Chun |
| author_facet | Li Xiaoguang Li Changhong Feng Chun |
| author_sort | Li Xiaoguang |
| collection | DOAJ |
| description | Excavation of tunnel in rock mass refers to complex continuum-discontinuous processes. For capturing the damages of side walls and the supports of bolts/cables, different types of elements shall be used in the same framework. In this work, a novel method is proposed which couples block, particle, and bar elements for simulating the intact rock mass, the broken rock mass, and the supporting system respectively during tunnel excavation. Brittle Mohr-Coulomb fracture constitutive law and tensile fracture constitutive law are introduced for describing the contact behavior between different parts. Penalty springs are adopted for accounting the pre-stresses effects. Moreover, for assuring the proper transitions of forces and displacements between different types of elements, an interpolation coupling approach is presented. Cases considering different tunnel sections and supporting strategies are numerically studied, indicating the reliability of the method. |
| first_indexed | 2024-12-22T06:35:18Z |
| format | Article |
| id | doaj.art-0b35017519a74e55aa1f850afd5ab0e3 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-22T06:35:18Z |
| publishDate | 2021-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-0b35017519a74e55aa1f850afd5ab0e32022-12-21T18:35:36ZengEDP SciencesE3S Web of Conferences2267-12422021-01-012480304210.1051/e3sconf/202124803042e3sconf_caes2021_03042A coupling method for simulating tunnel excavation with block, particle and bar elementsLi XiaoguangLi Changhong0Feng Chun1Department of Civil Engineering, University of Science and Technology BeijingInstitute of Mechanics, Chinese Academy of SciencesExcavation of tunnel in rock mass refers to complex continuum-discontinuous processes. For capturing the damages of side walls and the supports of bolts/cables, different types of elements shall be used in the same framework. In this work, a novel method is proposed which couples block, particle, and bar elements for simulating the intact rock mass, the broken rock mass, and the supporting system respectively during tunnel excavation. Brittle Mohr-Coulomb fracture constitutive law and tensile fracture constitutive law are introduced for describing the contact behavior between different parts. Penalty springs are adopted for accounting the pre-stresses effects. Moreover, for assuring the proper transitions of forces and displacements between different types of elements, an interpolation coupling approach is presented. Cases considering different tunnel sections and supporting strategies are numerically studied, indicating the reliability of the method.https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/24/e3sconf_caes2021_03042.pdf |
| spellingShingle | Li Xiaoguang Li Changhong Feng Chun A coupling method for simulating tunnel excavation with block, particle and bar elements E3S Web of Conferences |
| title | A coupling method for simulating tunnel excavation with block, particle and bar elements |
| title_full | A coupling method for simulating tunnel excavation with block, particle and bar elements |
| title_fullStr | A coupling method for simulating tunnel excavation with block, particle and bar elements |
| title_full_unstemmed | A coupling method for simulating tunnel excavation with block, particle and bar elements |
| title_short | A coupling method for simulating tunnel excavation with block, particle and bar elements |
| title_sort | coupling method for simulating tunnel excavation with block particle and bar elements |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/24/e3sconf_caes2021_03042.pdf |
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