Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock
Grouting can effectively seal and reinforce broken rock masses in deep geotechnical engineering, which have an important impact on groundwater-related disaster prevention and control. Based on multi-field coupling mechanics and rotational viscosity experiments, an advance grouting migration model of...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/4/661 |
| _version_ | 1797475865497436160 |
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| author | Zhixiong Jiang Dongjiang Pan Shuhao Zhang Zhiqiang Yin Jianjun Zhou |
| author_facet | Zhixiong Jiang Dongjiang Pan Shuhao Zhang Zhiqiang Yin Jianjun Zhou |
| author_sort | Zhixiong Jiang |
| collection | DOAJ |
| description | Grouting can effectively seal and reinforce broken rock masses in deep geotechnical engineering, which have an important impact on groundwater-related disaster prevention and control. Based on multi-field coupling mechanics and rotational viscosity experiments, an advance grouting migration model of cement slurry in tunnels with high-stress broken surrounding rock is built against the background of the Xianglushan Tunnel for water diversion in central Yunnan Province. The influence characteristics of water–cement ratio, grouting pressure, and initial permeability on the process of grouting material migration are analyzed by combining classical column theory and spherical theory. The results show the following: Overall, the growth rate of grouting radius is fast during the earlier 5 min and slows down later. At the fifth minute, the normal grouting ranges are 22 cm, 51 cm, and 58 cm, at water–cement ratios 0.6, 0.8, and 1.0, respectively, while the normal grouting ranges are 58 cm, 51 cm, and 36 cm at grouting pressures 2 MPa, 1 MPa, and 0.5 MPa, respectively; the normal grouting ranges are 58 cm, 24 cm, and 11 cm at initial permeabilities 5D, 0.5D, and 0.05D, respectively. At the 60th minute, the normal grouting ranges are 47 cm, 133 cm, and 155 cm at water–cement ratios 0.6, 0.8, and 1.0, respectively; the normal grouting ranges are 155 cm, 131 cm, and 96 cm at grouting pressures 2 MPa, 1 MPa, and 0.5 MPa, respectively; meanwhile, the normal grouting ranges are 155 cm, 63 cm, and 29 cm at initial permeabilities 5D, 0.5D, and 0.05D, respectively. This study can provide theoretical guidance for on-site grouting design in unfavorable geological treatment projects. |
| first_indexed | 2024-03-09T20:50:50Z |
| format | Article |
| id | doaj.art-a05dbc980d984116aec96b2aa8870dd1 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T20:50:50Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-a05dbc980d984116aec96b2aa8870dd12023-11-23T22:35:25ZengMDPI AGWater2073-44412022-02-0114466110.3390/w14040661Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding RockZhixiong Jiang0Dongjiang Pan1Shuhao Zhang2Zhiqiang Yin3Jianjun Zhou4School of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaState Key Laboratory of Shield Machine and Boring Technology, Zhengzhou 450001, ChinaChina Railway Development Investment Group Co., Ltd., Kunming 650200, ChinaSchool of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaState Key Laboratory of Shield Machine and Boring Technology, Zhengzhou 450001, ChinaGrouting can effectively seal and reinforce broken rock masses in deep geotechnical engineering, which have an important impact on groundwater-related disaster prevention and control. Based on multi-field coupling mechanics and rotational viscosity experiments, an advance grouting migration model of cement slurry in tunnels with high-stress broken surrounding rock is built against the background of the Xianglushan Tunnel for water diversion in central Yunnan Province. The influence characteristics of water–cement ratio, grouting pressure, and initial permeability on the process of grouting material migration are analyzed by combining classical column theory and spherical theory. The results show the following: Overall, the growth rate of grouting radius is fast during the earlier 5 min and slows down later. At the fifth minute, the normal grouting ranges are 22 cm, 51 cm, and 58 cm, at water–cement ratios 0.6, 0.8, and 1.0, respectively, while the normal grouting ranges are 58 cm, 51 cm, and 36 cm at grouting pressures 2 MPa, 1 MPa, and 0.5 MPa, respectively; the normal grouting ranges are 58 cm, 24 cm, and 11 cm at initial permeabilities 5D, 0.5D, and 0.05D, respectively. At the 60th minute, the normal grouting ranges are 47 cm, 133 cm, and 155 cm at water–cement ratios 0.6, 0.8, and 1.0, respectively; the normal grouting ranges are 155 cm, 131 cm, and 96 cm at grouting pressures 2 MPa, 1 MPa, and 0.5 MPa, respectively; meanwhile, the normal grouting ranges are 155 cm, 63 cm, and 29 cm at initial permeabilities 5D, 0.5D, and 0.05D, respectively. This study can provide theoretical guidance for on-site grouting design in unfavorable geological treatment projects.https://www.mdpi.com/2073-4441/14/4/661broken surrounding rock with high stressadvanced groutinggrouting migrationmulti-field coupling mechanicsnumerical simulation |
| spellingShingle | Zhixiong Jiang Dongjiang Pan Shuhao Zhang Zhiqiang Yin Jianjun Zhou Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock Water broken surrounding rock with high stress advanced grouting grouting migration multi-field coupling mechanics numerical simulation |
| title | Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock |
| title_full | Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock |
| title_fullStr | Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock |
| title_full_unstemmed | Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock |
| title_short | Advanced Grouting Model and Influencing Factors Analysis of Tunnels with High Stress and Broken Surrounding Rock |
| title_sort | advanced grouting model and influencing factors analysis of tunnels with high stress and broken surrounding rock |
| topic | broken surrounding rock with high stress advanced grouting grouting migration multi-field coupling mechanics numerical simulation |
| url | https://www.mdpi.com/2073-4441/14/4/661 |
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