Model Test of Anchoring Effect on Zonal Disintegration in Deep Surrounding Rock Masses
The deep rock masses show a different mechanical behavior compared with the shallow rock masses. They are classified into alternating fractured and intact zones during the excavation, which is known as zonal disintegration. Such phenomenon is a great disaster and will induce the different excavation...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2013/935148 |
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| author | Xu-Guang Chen Qiang-Yong Zhang Yuan Wang De-Jun Liu Ning Zhang |
| author_facet | Xu-Guang Chen Qiang-Yong Zhang Yuan Wang De-Jun Liu Ning Zhang |
| author_sort | Xu-Guang Chen |
| collection | DOAJ |
| description | The deep rock masses show a different mechanical behavior compared with the shallow rock masses. They are classified into alternating fractured and intact zones during the excavation, which is known as zonal disintegration. Such phenomenon is a great disaster and will induce the different excavation and anchoring methodology. In this study, a 3D geomechanics model test was conducted to research the anchoring effect of zonal disintegration. The model was constructed with anchoring in a half and nonanchoring in the other half, to compare with each other. The optical extensometer and optical sensor were adopted to measure the displacement and strain changing law in the model test. The displacement laws of the deep surrounding rocks were obtained and found to be nonmonotonic versus the distance to the periphery. Zonal disintegration occurs in the area without anchoring and did not occur in the model under anchoring condition. By contrasting the phenomenon, the anchor effect of restraining zonal disintegration was revealed. And the formation condition of zonal disintegration was decided. In the procedure of tunnel excavation, the anchor strain was found to be alternation in tension and compression. It indicates that anchor will show the nonmonotonic law during suppressing the zonal disintegration. |
| format | Article |
| id | doaj-art-20dd3e8e6c894b1bb9bcd3e941f1f44a |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-20dd3e8e6c894b1bb9bcd3e941f1f44a2025-08-20T03:54:47ZengWileyThe Scientific World Journal1537-744X2013-01-01201310.1155/2013/935148935148Model Test of Anchoring Effect on Zonal Disintegration in Deep Surrounding Rock MassesXu-Guang Chen0Qiang-Yong Zhang1Yuan Wang2De-Jun Liu3Ning Zhang4Institute of Tunnel and Urban Railway Engineering, Hohai University, Nanjing 210098, Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai Univ., Nanjing 210098, ChinaResearch Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, ChinaInstitute of Tunnel and Urban Railway Engineering, Hohai University, Nanjing 210098, Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai Univ., Nanjing 210098, ChinaResearch Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, ChinaResearch Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, ChinaThe deep rock masses show a different mechanical behavior compared with the shallow rock masses. They are classified into alternating fractured and intact zones during the excavation, which is known as zonal disintegration. Such phenomenon is a great disaster and will induce the different excavation and anchoring methodology. In this study, a 3D geomechanics model test was conducted to research the anchoring effect of zonal disintegration. The model was constructed with anchoring in a half and nonanchoring in the other half, to compare with each other. The optical extensometer and optical sensor were adopted to measure the displacement and strain changing law in the model test. The displacement laws of the deep surrounding rocks were obtained and found to be nonmonotonic versus the distance to the periphery. Zonal disintegration occurs in the area without anchoring and did not occur in the model under anchoring condition. By contrasting the phenomenon, the anchor effect of restraining zonal disintegration was revealed. And the formation condition of zonal disintegration was decided. In the procedure of tunnel excavation, the anchor strain was found to be alternation in tension and compression. It indicates that anchor will show the nonmonotonic law during suppressing the zonal disintegration.http://dx.doi.org/10.1155/2013/935148 |
| spellingShingle | Xu-Guang Chen Qiang-Yong Zhang Yuan Wang De-Jun Liu Ning Zhang Model Test of Anchoring Effect on Zonal Disintegration in Deep Surrounding Rock Masses The Scientific World Journal |
| title | Model Test of Anchoring Effect on Zonal Disintegration in Deep Surrounding Rock Masses |
| title_full | Model Test of Anchoring Effect on Zonal Disintegration in Deep Surrounding Rock Masses |
| title_fullStr | Model Test of Anchoring Effect on Zonal Disintegration in Deep Surrounding Rock Masses |
| title_full_unstemmed | Model Test of Anchoring Effect on Zonal Disintegration in Deep Surrounding Rock Masses |
| title_short | Model Test of Anchoring Effect on Zonal Disintegration in Deep Surrounding Rock Masses |
| title_sort | model test of anchoring effect on zonal disintegration in deep surrounding rock masses |
| url | http://dx.doi.org/10.1155/2013/935148 |
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