Study on the Stability of Surrounding Rock of Underground Circular Cavern Based on the Anchor Reinforcement Effect
Achieving a comprehensive and accurate understanding of the anchor reinforcement mechanism and a quantitative evaluation of the surrounding rock’s stability for an anchored underground cavern can provide an important theoretical basis for supporting and excavating the cavern. First, the composite be...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/4185070 |
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| author | Shuancheng Gu Pan Zhou Wei Sun Chunhui Hu Zhi Li Chao Wang |
| author_facet | Shuancheng Gu Pan Zhou Wei Sun Chunhui Hu Zhi Li Chao Wang |
| author_sort | Shuancheng Gu |
| collection | DOAJ |
| description | Achieving a comprehensive and accurate understanding of the anchor reinforcement mechanism and a quantitative evaluation of the surrounding rock’s stability for an anchored underground cavern can provide an important theoretical basis for supporting and excavating the cavern. First, the composite bearing structure composed of the anchor and surrounding rock was defined as the surrounding rock reinforcement body by using the homogenization method, and a new method for evaluating the stability of surrounding rock by the surrounding rock reinforcement body deformation and damage degree was proposed. Second, based on the anchor reinforcement effect, the expression of the physical-mechanical parameters of the surrounding rock reinforcement body was deduced, and the analytical solution of stress and displacement of the surrounding rock reinforcement body was obtained. Finally, the stability coefficient of surrounding rock indicating the degree of the surrounding rock reinforcement body damage was defined. The research showed that the theoretical solution agreed well with the results of the numerical simulation, and the difference between the theoretical solution and the monitoring value was less than 10%, which verified the reliability of the method and the results of this paper. The design of the length and spacing of the anchor followed the principle of long but sparse and short but dense, and the pretightening force of the anchor and the stability coefficient of surrounding rock varied linearly. The analytical solution of this paper provides a theoretical reference for understanding the mechanism of anchor support and provides a quantitative evaluation method for the stability of surrounding rock. Compared with the traditional support design, the theory of this paper gives full play to the self-stability of the surrounding rock and the strength of the anchor, which is conducive to saving support costs and avoiding the construction limitations in some projects. |
| format | Article |
| id | doaj-art-654ebcbb7bde4f90a1b93f31476826c3 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-654ebcbb7bde4f90a1b93f31476826c32025-08-20T03:34:36ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/41850704185070Study on the Stability of Surrounding Rock of Underground Circular Cavern Based on the Anchor Reinforcement EffectShuancheng Gu0Pan Zhou1Wei Sun2Chunhui Hu3Zhi Li4Chao Wang5School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaAchieving a comprehensive and accurate understanding of the anchor reinforcement mechanism and a quantitative evaluation of the surrounding rock’s stability for an anchored underground cavern can provide an important theoretical basis for supporting and excavating the cavern. First, the composite bearing structure composed of the anchor and surrounding rock was defined as the surrounding rock reinforcement body by using the homogenization method, and a new method for evaluating the stability of surrounding rock by the surrounding rock reinforcement body deformation and damage degree was proposed. Second, based on the anchor reinforcement effect, the expression of the physical-mechanical parameters of the surrounding rock reinforcement body was deduced, and the analytical solution of stress and displacement of the surrounding rock reinforcement body was obtained. Finally, the stability coefficient of surrounding rock indicating the degree of the surrounding rock reinforcement body damage was defined. The research showed that the theoretical solution agreed well with the results of the numerical simulation, and the difference between the theoretical solution and the monitoring value was less than 10%, which verified the reliability of the method and the results of this paper. The design of the length and spacing of the anchor followed the principle of long but sparse and short but dense, and the pretightening force of the anchor and the stability coefficient of surrounding rock varied linearly. The analytical solution of this paper provides a theoretical reference for understanding the mechanism of anchor support and provides a quantitative evaluation method for the stability of surrounding rock. Compared with the traditional support design, the theory of this paper gives full play to the self-stability of the surrounding rock and the strength of the anchor, which is conducive to saving support costs and avoiding the construction limitations in some projects.http://dx.doi.org/10.1155/2018/4185070 |
| spellingShingle | Shuancheng Gu Pan Zhou Wei Sun Chunhui Hu Zhi Li Chao Wang Study on the Stability of Surrounding Rock of Underground Circular Cavern Based on the Anchor Reinforcement Effect Advances in Civil Engineering |
| title | Study on the Stability of Surrounding Rock of Underground Circular Cavern Based on the Anchor Reinforcement Effect |
| title_full | Study on the Stability of Surrounding Rock of Underground Circular Cavern Based on the Anchor Reinforcement Effect |
| title_fullStr | Study on the Stability of Surrounding Rock of Underground Circular Cavern Based on the Anchor Reinforcement Effect |
| title_full_unstemmed | Study on the Stability of Surrounding Rock of Underground Circular Cavern Based on the Anchor Reinforcement Effect |
| title_short | Study on the Stability of Surrounding Rock of Underground Circular Cavern Based on the Anchor Reinforcement Effect |
| title_sort | study on the stability of surrounding rock of underground circular cavern based on the anchor reinforcement effect |
| url | http://dx.doi.org/10.1155/2018/4185070 |
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