Calculation model of shotcrete support thickness based on elastic thin plate theory
In order to accurately calculate the thickness of shotcrete in tunnel, the support load, inter-anchor row distance and concrete mechanical properties are selected as influencing factors, and a mechanical model of shotcrete support thickness is established based on the elastic thin plate theory to de...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522003643 |
| _version_ | 1811238761079504896 |
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| author | CAO Yong WU Ai-xiang HOU Yong-qiang WANG Shao-yong |
| author_facet | CAO Yong WU Ai-xiang HOU Yong-qiang WANG Shao-yong |
| author_sort | CAO Yong |
| collection | DOAJ |
| description | In order to accurately calculate the thickness of shotcrete in tunnel, the support load, inter-anchor row distance and concrete mechanical properties are selected as influencing factors, and a mechanical model of shotcrete support thickness is established based on the elastic thin plate theory to derive the relationship between support load, inter-anchor row distance, concrete mechanical properties and concrete thickness. The controlled variable method (CVM) was used to study the variation law of support load and inter-anchor row distance with concrete thickness. The results show that: the mechanical properties of the concrete slurry remain unchanged, the required thickness of the concrete support increases with the increase of the support load, in a power of 1/2 relationship, with the increasing thickness of the shotcrete, the concrete is prone to shear damage to tensile damage until the thickness meets the engineering requirements; the support load remains unchanged, the thickness of the concrete support is linearly related to the anchor rod spacing, with the increase of the anchor rod spacing As the anchor spacing increases, the required thickness of concrete support also increases linearly. This paper successfully defines the relationship between the required concrete support thickness, support load and anchor rod parameters for shear and tensile damage, and through the analysis of the anchor spraying case, it is believed that the calculation model is reasonable and the results can provide a theoretical basis for the quantitative design of the support system. |
| first_indexed | 2024-04-12T12:47:54Z |
| format | Article |
| id | doaj.art-18cede4f7aad48398084f496e35b3745 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-12T12:47:54Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-18cede4f7aad48398084f496e35b37452022-12-22T03:32:33ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01232Calculation model of shotcrete support thickness based on elastic thin plate theoryCAO Yong0WU Ai-xiang1HOU Yong-qiang2WANG Shao-yong3School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of the Ministry of Education of China for High-efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China; Correspondence to: Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China.School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of the Ministry of Education of China for High-efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of the Ministry of Education of China for High-efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; Key Laboratory of the Ministry of Education of China for High-efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, ChinaIn order to accurately calculate the thickness of shotcrete in tunnel, the support load, inter-anchor row distance and concrete mechanical properties are selected as influencing factors, and a mechanical model of shotcrete support thickness is established based on the elastic thin plate theory to derive the relationship between support load, inter-anchor row distance, concrete mechanical properties and concrete thickness. The controlled variable method (CVM) was used to study the variation law of support load and inter-anchor row distance with concrete thickness. The results show that: the mechanical properties of the concrete slurry remain unchanged, the required thickness of the concrete support increases with the increase of the support load, in a power of 1/2 relationship, with the increasing thickness of the shotcrete, the concrete is prone to shear damage to tensile damage until the thickness meets the engineering requirements; the support load remains unchanged, the thickness of the concrete support is linearly related to the anchor rod spacing, with the increase of the anchor rod spacing As the anchor spacing increases, the required thickness of concrete support also increases linearly. This paper successfully defines the relationship between the required concrete support thickness, support load and anchor rod parameters for shear and tensile damage, and through the analysis of the anchor spraying case, it is believed that the calculation model is reasonable and the results can provide a theoretical basis for the quantitative design of the support system.http://www.sciencedirect.com/science/article/pii/S2214509522003643Concrete thicknessMechanical modelElastic thin plate theoryQuantitative design |
| spellingShingle | CAO Yong WU Ai-xiang HOU Yong-qiang WANG Shao-yong Calculation model of shotcrete support thickness based on elastic thin plate theory Case Studies in Construction Materials Concrete thickness Mechanical model Elastic thin plate theory Quantitative design |
| title | Calculation model of shotcrete support thickness based on elastic thin plate theory |
| title_full | Calculation model of shotcrete support thickness based on elastic thin plate theory |
| title_fullStr | Calculation model of shotcrete support thickness based on elastic thin plate theory |
| title_full_unstemmed | Calculation model of shotcrete support thickness based on elastic thin plate theory |
| title_short | Calculation model of shotcrete support thickness based on elastic thin plate theory |
| title_sort | calculation model of shotcrete support thickness based on elastic thin plate theory |
| topic | Concrete thickness Mechanical model Elastic thin plate theory Quantitative design |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522003643 |
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