Shear Strength and Re-Failure Characteristics of Intact Red Sandstone and Grouting-Reinforced Body of Fractured Red Sandstone under Different Shear Angles
To reveal the strengthening mechanism and re-failure mechanism of grouting on fractured rock, the variable-angle shear tests, real-time acoustic emission (AE) tests and VIC-3D (non-contact full field strain measurement system) tests were carried out on intact red sandstone (IRS) and grouting-reinfor...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-12-01
|
| Series: | Minerals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-163X/12/12/1580 |
| _version_ | 1797456125722886144 |
|---|---|
| author | Yaoguang Huang Wanxia Yang Aining Zhao Weibin Guo |
| author_facet | Yaoguang Huang Wanxia Yang Aining Zhao Weibin Guo |
| author_sort | Yaoguang Huang |
| collection | DOAJ |
| description | To reveal the strengthening mechanism and re-failure mechanism of grouting on fractured rock, the variable-angle shear tests, real-time acoustic emission (AE) tests and VIC-3D (non-contact full field strain measurement system) tests were carried out on intact red sandstone (IRS) and grouting-reinforced body of fractured red sandstone (GRBFRS). The results show that the peak shear strength of IRS and GRBFRS decreases with the increase of shear angle. Grouting reinforcement mainly increases the cohesion of GRBFRS to improve its shear strength, but its reconstructability decreases with the increase of shear angle. In the whole process of shear deformation, the shear micro damage and shear fracture of GRBFRS are more than those of IRS. Although the shear re-failure before and after the peak stress stage is the most notable, its intensity or degree is reduced. When the shear angle is 45°, both IRS and GRBFRS undergo shear-splitting failure. However, when the shear angle is large, the IRS and GRBFRS only occurs shear failure. Moreover, the larger the shear angle, the more likely IRS and GRBFRS is to produce secondary shear cracks. The low strength of the rock–grout interface in GRBFRS is the main inducer of shear re-failure. |
| first_indexed | 2024-03-09T16:03:53Z |
| format | Article |
| id | doaj.art-121b9f933b274755a50bdc309482bf3a |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T16:03:53Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-121b9f933b274755a50bdc309482bf3a2023-11-24T16:52:12ZengMDPI AGMinerals2075-163X2022-12-011212158010.3390/min12121580Shear Strength and Re-Failure Characteristics of Intact Red Sandstone and Grouting-Reinforced Body of Fractured Red Sandstone under Different Shear AnglesYaoguang Huang0Wanxia Yang1Aining Zhao2Weibin Guo3College of Sciences, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Sciences, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Sciences, Xi’an University of Science and Technology, Xi’an 710054, ChinaSchool of Energy, Xi’an University of Science and Technology, Xi’an 710054, ChinaTo reveal the strengthening mechanism and re-failure mechanism of grouting on fractured rock, the variable-angle shear tests, real-time acoustic emission (AE) tests and VIC-3D (non-contact full field strain measurement system) tests were carried out on intact red sandstone (IRS) and grouting-reinforced body of fractured red sandstone (GRBFRS). The results show that the peak shear strength of IRS and GRBFRS decreases with the increase of shear angle. Grouting reinforcement mainly increases the cohesion of GRBFRS to improve its shear strength, but its reconstructability decreases with the increase of shear angle. In the whole process of shear deformation, the shear micro damage and shear fracture of GRBFRS are more than those of IRS. Although the shear re-failure before and after the peak stress stage is the most notable, its intensity or degree is reduced. When the shear angle is 45°, both IRS and GRBFRS undergo shear-splitting failure. However, when the shear angle is large, the IRS and GRBFRS only occurs shear failure. Moreover, the larger the shear angle, the more likely IRS and GRBFRS is to produce secondary shear cracks. The low strength of the rock–grout interface in GRBFRS is the main inducer of shear re-failure.https://www.mdpi.com/2075-163X/12/12/1580grouting-reinforced bodyshear behaviorshear failurestrength predictionstrain evolutionrock–grout interface |
| spellingShingle | Yaoguang Huang Wanxia Yang Aining Zhao Weibin Guo Shear Strength and Re-Failure Characteristics of Intact Red Sandstone and Grouting-Reinforced Body of Fractured Red Sandstone under Different Shear Angles Minerals grouting-reinforced body shear behavior shear failure strength prediction strain evolution rock–grout interface |
| title | Shear Strength and Re-Failure Characteristics of Intact Red Sandstone and Grouting-Reinforced Body of Fractured Red Sandstone under Different Shear Angles |
| title_full | Shear Strength and Re-Failure Characteristics of Intact Red Sandstone and Grouting-Reinforced Body of Fractured Red Sandstone under Different Shear Angles |
| title_fullStr | Shear Strength and Re-Failure Characteristics of Intact Red Sandstone and Grouting-Reinforced Body of Fractured Red Sandstone under Different Shear Angles |
| title_full_unstemmed | Shear Strength and Re-Failure Characteristics of Intact Red Sandstone and Grouting-Reinforced Body of Fractured Red Sandstone under Different Shear Angles |
| title_short | Shear Strength and Re-Failure Characteristics of Intact Red Sandstone and Grouting-Reinforced Body of Fractured Red Sandstone under Different Shear Angles |
| title_sort | shear strength and re failure characteristics of intact red sandstone and grouting reinforced body of fractured red sandstone under different shear angles |
| topic | grouting-reinforced body shear behavior shear failure strength prediction strain evolution rock–grout interface |
| url | https://www.mdpi.com/2075-163X/12/12/1580 |
| work_keys_str_mv | AT yaoguanghuang shearstrengthandrefailurecharacteristicsofintactredsandstoneandgroutingreinforcedbodyoffracturedredsandstoneunderdifferentshearangles AT wanxiayang shearstrengthandrefailurecharacteristicsofintactredsandstoneandgroutingreinforcedbodyoffracturedredsandstoneunderdifferentshearangles AT ainingzhao shearstrengthandrefailurecharacteristicsofintactredsandstoneandgroutingreinforcedbodyoffracturedredsandstoneunderdifferentshearangles AT weibinguo shearstrengthandrefailurecharacteristicsofintactredsandstoneandgroutingreinforcedbodyoffracturedredsandstoneunderdifferentshearangles |