Physical model test on the support characteristic for quasi-NPR bolt under asymmetric stress
With the continuous increase in tunnel construction, the significant deformation of the surrounding tunnel rock is often difficult to predict and control. In addition, the lithology, structure, and various asymmetric large deformation of surrounding rock mass during operation and maintenance severel...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2023-08-01
|
| Series: | Underground Space |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S246796742300020X |
| _version_ | 1797797209871220736 |
|---|---|
| author | Wei Ming Xiaojie Yang Yadong Mao Xiang Wang Manchao He Zhigang Tao |
| author_facet | Wei Ming Xiaojie Yang Yadong Mao Xiang Wang Manchao He Zhigang Tao |
| author_sort | Wei Ming |
| collection | DOAJ |
| description | With the continuous increase in tunnel construction, the significant deformation of the surrounding tunnel rock is often difficult to predict and control. In addition, the lithology, structure, and various asymmetric large deformation of surrounding rock mass during operation and maintenance severely affect the ultimate bearing and stability of the tunnel. To explore the deformation mechanisms and failure modes of surrounding rock under large asymmetric stress and complex geological conditions, a physical model of a tunnel through granite was constructed based on the similarity theory. The model had 30° dip lithology under asymmetric stress and was emplaced a new quasi-negative Poisson’s ratio (NPR) bolt. By analyzing the variation law of displacement and axial force of the bolt under an asymmetric load, the asymmetric deformation and failure mechanism of the granite tunnel and the support effect of the quasi-NPR bolt were determined. The energy absorbed by the surrounding rock was analyzed, and the influence mechanism and control countermeasures of asymmetric stress on the granite tunnel were explored. This work provides a reference for the design of asymmetric support of tunnels with similar engineering backgrounds. |
| first_indexed | 2024-03-13T03:44:46Z |
| format | Article |
| id | doaj.art-94a9965eaef042e8805ac9c29ffe5a61 |
| institution | Directory Open Access Journal |
| issn | 2467-9674 |
| language | English |
| last_indexed | 2024-03-13T03:44:46Z |
| publishDate | 2023-08-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Underground Space |
| spelling | doaj.art-94a9965eaef042e8805ac9c29ffe5a612023-06-23T04:43:25ZengKeAi Communications Co., Ltd.Underground Space2467-96742023-08-01114662Physical model test on the support characteristic for quasi-NPR bolt under asymmetric stressWei Ming0Xiaojie Yang1Yadong Mao2Xiang Wang3Manchao He4Zhigang Tao5State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China; School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China; School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China; School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China; School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China; School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaCorresponding author at: State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China.; State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China; School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaWith the continuous increase in tunnel construction, the significant deformation of the surrounding tunnel rock is often difficult to predict and control. In addition, the lithology, structure, and various asymmetric large deformation of surrounding rock mass during operation and maintenance severely affect the ultimate bearing and stability of the tunnel. To explore the deformation mechanisms and failure modes of surrounding rock under large asymmetric stress and complex geological conditions, a physical model of a tunnel through granite was constructed based on the similarity theory. The model had 30° dip lithology under asymmetric stress and was emplaced a new quasi-negative Poisson’s ratio (NPR) bolt. By analyzing the variation law of displacement and axial force of the bolt under an asymmetric load, the asymmetric deformation and failure mechanism of the granite tunnel and the support effect of the quasi-NPR bolt were determined. The energy absorbed by the surrounding rock was analyzed, and the influence mechanism and control countermeasures of asymmetric stress on the granite tunnel were explored. This work provides a reference for the design of asymmetric support of tunnels with similar engineering backgrounds.http://www.sciencedirect.com/science/article/pii/S246796742300020XAsymmetric stressPhysical model testQuasi-NPR boltSupport characteristic |
| spellingShingle | Wei Ming Xiaojie Yang Yadong Mao Xiang Wang Manchao He Zhigang Tao Physical model test on the support characteristic for quasi-NPR bolt under asymmetric stress Underground Space Asymmetric stress Physical model test Quasi-NPR bolt Support characteristic |
| title | Physical model test on the support characteristic for quasi-NPR bolt under asymmetric stress |
| title_full | Physical model test on the support characteristic for quasi-NPR bolt under asymmetric stress |
| title_fullStr | Physical model test on the support characteristic for quasi-NPR bolt under asymmetric stress |
| title_full_unstemmed | Physical model test on the support characteristic for quasi-NPR bolt under asymmetric stress |
| title_short | Physical model test on the support characteristic for quasi-NPR bolt under asymmetric stress |
| title_sort | physical model test on the support characteristic for quasi npr bolt under asymmetric stress |
| topic | Asymmetric stress Physical model test Quasi-NPR bolt Support characteristic |
| url | http://www.sciencedirect.com/science/article/pii/S246796742300020X |
| work_keys_str_mv | AT weiming physicalmodeltestonthesupportcharacteristicforquasinprboltunderasymmetricstress AT xiaojieyang physicalmodeltestonthesupportcharacteristicforquasinprboltunderasymmetricstress AT yadongmao physicalmodeltestonthesupportcharacteristicforquasinprboltunderasymmetricstress AT xiangwang physicalmodeltestonthesupportcharacteristicforquasinprboltunderasymmetricstress AT manchaohe physicalmodeltestonthesupportcharacteristicforquasinprboltunderasymmetricstress AT zhigangtao physicalmodeltestonthesupportcharacteristicforquasinprboltunderasymmetricstress |